Apkarian, P & Hoang Duong Tuan 2000, 'Robust control via concave minimization local and global algorithms', IEEE Transactions on Automatic Control, vol. 45, no. 2, pp. 299-305.
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Apkarian, P & Tuan, HD 2000, 'Low nonconvexity-rank bilinear matrix inequalities: algorithms and applications in robust controller and structure designs', IEEE Transactions on Automatic Control, vol. 45, no. 11, pp. 2111-2117.
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Apkarian, P & Tuan, HD 2000, 'Parameterized LMIs in Control Theory', SIAM Journal on Control and Optimization, vol. 38, no. 4, pp. 1241-1264.
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Apkarian, P, Pellanda, PC & Tuan, HD 2000, 'Mixed H2/H∞ multi-channel linear parameter-varying control in discrete time', Systems & Control Letters, vol. 41, no. 5, pp. 333-346.
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Ayre, PJ, Vidakovic, SS, Tansley, GD, Watterson, PA & Lovell, NH 2000, 'Sensorless Flow and Head Estimation in the VentrAssist Rotary Blood Pump', Artificial Organs, vol. 24, no. 8, pp. 585-588.
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Bai, MR, Hsiao, I, Tsai, H & Lin, C 2000, 'Development of an on-line diagnosis system for rotor vibration via model-based intelligent inference', The Journal of the Acoustical Society of America, vol. 107, no. 1, pp. 315-323.
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Barton, IE & Kirby, R 2000, 'Finite difference scheme for the solution of fluid flow problems on non‐staggered grids', International Journal for Numerical Methods in Fluids, vol. 33, no. 7, pp. 939-959.
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Barton, IE & Kirby, R 2000, 'Finite difference scheme for the solution of fluid flow problems on non‐staggered grids', International Journal for Numerical Methods in Fluids, vol. 33, no. 7, pp. 939-959.
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Bell, J, Besong, AA, Tipper, JL, Ingham, E, Wroblewski, BM, Stone, MH & Fisher, J 2000, 'Influence of gelatin and bovine serum lubricants on ultra-high molecular weight polyethylene wear debris generated in in vitro simulations', Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, vol. 214, no. 5, pp. 513-518.
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Ultra-high molecular weight polyethylene (UHMWPE) wear debris induced osteolysis has a major role in the late aseptic loosening and ultimate failure of total hip replacements (THR). Clinically relevant in vitro simulations of wear are essential to predict the osteolytic potential of bearing surfaces in artificial hip joints. Newborn calf or bovine serum has been accepted as a boundary lubricant for such in vitro tests, but its biological stability has been questioned. This study compared the wear factors, number of wear particles and levels of microbial contamination produced in bovine serum and a gelatin-based lubricant. The wear factors produced by the two lubricants were not significantly different, however the wear debris morphology produced was substantially different. The bovine serum became contaminated with micro-organisms within 28 h, whereas the protein-based lubricant remained uncontaminated. The results showed that bovine serum was not a stable boundary lubricant. They also showed that although the wear factors for the two solutions were not significantly different, the protein-based lubricant was not a suitable alternative to bovine serum because the wear debris produced was not clinically relevant.
Beydoun, G & Hoffmann, A 2000, 'Incremental acquisition of search knowledge', INTERNATIONAL JOURNAL OF HUMAN-COMPUTER STUDIES, vol. 52, no. 3, pp. 493-530.
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Biacino, L, Gerla, G & Ying, MS 2000, 'Approximate reasoning based on similarity', MATHEMATICAL LOGIC QUARTERLY, vol. 46, no. 1, pp. 77-86.
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The connection between similarity logic and the theory of closure operators is examined. Indeed one proves that the consequence relation defined in [14] can be obtained by composing two closure operators and that the resulting operator is still a closure
Bishop, DW, Thomas, PS & Ray, AS 2000, 'Micro Raman characterization of nickel sulfide inclusions in toughened glass', MATERIALS RESEARCH BULLETIN, vol. 35, no. 7, pp. 1123-1128.
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Toughened glass panels used as glazing material in multistory buildings are subject to fracture when they contain nickel sulfide inclusions. The failure mechanism is generally attributed to the significant volume increase related to a polymorphic phase retransformation in nickel sulfide. This investigation exploits the ability of micro Raman spectroscopy to analyze minute inclusions. The technique is able to distinguish between different polymorphs and various stoichiometric forms of nickel sulfide and has the potential to satisfy the need for an in situ, nondestructive analytical technique for the characterization of nickel sulfide inclusions in glass.
Blunden, BG & Indraratna, B 2000, 'Evaluation of surface and groundwater management strategies for drained sulfidic soil using numerical simulation models', Soil Research, vol. 38, no. 3, pp. 569-569.
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The effective management of acid sulfate soils is a major issue for many
coastal regions in Australia. Simulations were conducted to evaluate 4
different water management strategies that could be applied to agricultural
land on the south coast of New South Wales, Australia, to minimise acid
generation from acid sulfate soils. The water management strategies are
compared with the existing extensively drained situation which generates and
discharges large quantities of acidic pyrite oxidation products. The 4 water
management strategies include elevated drain water levels using a weir, 25 mm
irrigation on a 7- or 14-day cycle, and elevated drain water levels with
irrigation. All of these strategies were designed to minimise the generation
of acid by reducing the transport of oxygen to the sulfidic soil. Simulations
were conducted for weather and site conditions experienced during a 12-month
period starting in July 1997.
Model simulations showed that maintenance of elevated drain water levels using
a weir in the drain significantly reduced the amount of acid generated by
75% and 57%, at 10 and 90 m distance from the drain,
respectively, by comparison with the existing drained state. The addition of
25 mm irrigation on a 14-day cycle to the weir simulation reduced the
oxidation of pyrite by a further 1–2%. Application of irrigation
only on a 7-day cycle also reduced the acid generated by 89% and
94% at 10 and 90 m distance from the drain, respectively, by comparison
with the existing drained state. Irrigation on a 14-day cycle was not as
successful in reducing pyrite oxidation as either the 7-day irrigation or weir
strategies. Evaluation of the 4 water management options showed that
significant improvements can be made with respect to the amount of acid
generated by relatively simple and cost-effective land management practices.
Braunerhjelm, P, Carlsson, B, Cetindamar, D & Johansson, D 2000, 'The old and the new: the evolution of polymer and biomedical clusters in Ohio and Sweden', Journal of Evolutionary Economics, vol. 10, no. 5, pp. 471-488.
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Callipo, A, Cucchiara, R & Piccardi, M 2000, 'Computational models for image processing for shared-memory multiprocessors', Integrated Computer-Aided Engineering, vol. 7, no. 1, pp. 39-52.
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Different tasks in image processing exhibit different computational requirements that should be considered with respect to the architecture. This is particularly critical in parallel machines where many parallelization techniques, as data partitioning an
Candy, L & Edmonds, EA 2000, 'Creativity Enhancement With Emerging Technologies - For The Creative Person, The Ability To Determine How The Creative Process Evolves Is Of Critical Importance.', Communications Of The Acm, vol. 43, no. 8, pp. 62-65.
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Castel, A, François, R & Arliguie, G 2000, 'Mechanical behaviour of corroded reinforced concrete beams—Part 1: Experimental study of corroded beams', Materials and Structures, vol. 33, no. 9, pp. 539-544.
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Castel, A, François, R & Arliguie, G 2000, 'Mechanical behaviour of corroded reinforced concrete beams—Part 2: Bond and notch effects', Materials and Structures, vol. 33, no. 9, pp. 545-551.
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CATCHPOOLE, D 2000, 'Mutation analysis of H19 and NAP1L4 (hNAP2) candidate genes and IGF2 DMR2 in Beckwith-Wiedemann syndrome', Journal of Medical Genetics, vol. 37, no. 3, pp. 212-215.
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Center, JR, Nguyen, TV, Sambrook, PN & Eisman, JA 2000, 'Hormonal and Biochemical Parameters and Osteoporotic Fractures in Elderly Men', Journal of Bone and Mineral Research, vol. 15, no. 7, pp. 1405-1411.
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Chia-Feng Juang, Jiann-Yow Lin & Chin-Teng Lin 2000, 'Genetic reinforcement learning through symbiotic evolution for fuzzy controller design', IEEE Transactions on Systems, Man and Cybernetics, Part B (Cybernetics), vol. 30, no. 2, pp. 290-302.
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Ching-Sung Shieh & Chin-Teng Lin 2000, 'Direction of arrival estimation based on phase differences using neural fuzzy network', IEEE Transactions on Antennas and Propagation, vol. 48, no. 7, pp. 1115-1124.
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Chin-Teng Lin & Chong-Ping Jou 2000, 'GA-based fuzzy reinforcement learning for control of a magnetic bearing system', IEEE Transactions on Systems, Man and Cybernetics, Part B (Cybernetics), vol. 30, no. 2, pp. 276-289.
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Chin-Teng Lin & Shinq-Jen Wu 2000, 'Optimal fuzzy controller design in continuous fuzzy system: global concept approach', IEEE Transactions on Fuzzy Systems, vol. 8, no. 6, pp. 713-729.
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Chin-Teng Lin, Hsi-Wen Nein & Jiing-Yuan Hwu 2000, 'GA-based noisy speech recognition using two-dimensional cepstrum', IEEE Transactions on Speech and Audio Processing, vol. 8, no. 6, pp. 664-675.
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Chin-Teng Lin, Yin-Cheung Lee & Her-Chang Pu 2000, 'Satellite sensor image classification using cascaded architecture of neural fuzzy network', IEEE Transactions on Geoscience and Remote Sensing, vol. 38, no. 2, pp. 1033-1043.
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Chong, NR, Burnett, IS & Chicharo, JF 2000, 'A new waveform interpolation coding scheme based on pitch synchronous wavelet transform decomposition', IEEE Transactions on Speech and Audio Processing, vol. 8, no. 3, pp. 345-348.
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Chong-White, NR & Burnett, IS 2000, 'Accurate, critically sampled characteristic waveform surface construction for waveform interpolation decomposition', Electronics Letters, vol. 36, no. 14, pp. 1245-1245.
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Chong-White, NR & Burnett, IS 2000, 'Improved signal analysis and time-synchronous reconstruction in waveform interpolation coding', 2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421), pp. 56-58.
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Chung, I-F, Lin, C-J & Lin, C-T 2000, 'A GA-based fuzzy adaptive learning control network', Fuzzy Sets and Systems, vol. 112, no. 1, pp. 65-84.
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Cranton, WM, Mastio, EA, Thomas, CB, Tsakonas, C & Stevens, R 2000, 'Laser processing for enhanced performance thin film electroluminescent devices', Electronics Letters, vol. 36, no. 8, pp. 754-754.
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Cronin, SJ, Manoharan, V, Hedley, MJ & Loganathan, P 2000, 'Fluoride: A review of its fate, bioavailability, and risks of fluorosis in grazed-pasture systems in New Zealand', NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH, vol. 43, no. 3, pp. 295-321.
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Fluoride (F) is an essential element for animal growth, not readily taken up by plants from soils, yet cases of acute fluorosis in grazing animals caused by ingestion of phosphatic fertilisers, volcanic ash, and industrial wastes remind us of its potential hazard. Fluoride concentrations in topsoils slowly increase where annual inputs through atmospheric pollution and phosphatic fertilisers exceed losses. This paper reviews information on the fate of F in grazed pasture systems with the aim of assessing the potential toxicity of accumulating soil F. A preliminary F-cycling model for grazed pastures, based on the review of international literature and F concentrations in selected New Zealand pasture soils, indicated that grazing sheep and cattle obtain over 50% of their dietary F (and this may be >80% during winter) from soil ingestion. The model suggests that at the extremes of the ranges of the measured winter soil ingestion (143–300 g d-1 for sheep and 900–1600 g d-1 for cattle) and dietary F absorptivity (bioavailability) of soil F (20–38%), total topsoil F concentrations in the range of 372–1461 μg F g-1 could cause chronic fluorosis in sheep and 326–1085 μg F g-1in cattle. We recommend that research is undertaken to measure F accumulation rates and soil F dietary absorptivity for a range of intensively managed New Zealand pasture soils. © 2000 Taylor & Francis Group, LLC.
Cucchiara, R, Grana, C, Piccardi, M & Prati, A 2000, 'Statistic and knowledge-based moving object detection in traffic scenes', ITSC2000. 2000 IEEE Intelligent Transportation Systems. Proceedings (Cat. No.00TH8493), pp. 27-32.
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Cucchiara, R, Piccardi, M & Mello, P 2000, 'Image analysis and rule-based reasoning for a traffic monitoring system', IEEE Transactions on Intelligent Transportation Systems, vol. 1, no. 2, pp. 119-130.
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The paper presents an approach for detecting vehicles in urban traffic scenes by means of rule-based reasoning on visual data. The strength of the approach is its formal separation between the low-level image processing modules (used for extracting visual data under various illumination conditions) and the high-level module, which provides a general-purpose knowledge-based framework for tracking vehicles in the scene. The image-processing modules extract visual data from the scene by spatio-temporal analysis during daytime, and by morphological analysis of headlights at night. The high-level module is designed as a forward chaining production rule system, working on symbolic data, i.e., vehicles and their attributes (area, pattern, direction, and others) and exploiting a set of heuristic rules tuned to urban traffic conditions. The synergy between the artificial intelligence techniques of the high-level and the low-level image analysis techniques provides the system with flexibility and robustness.
Dahlstrand, XSL & Cetindamar, D 2000, 'The dynamics of innovation financing in Sweden', Venture Capital, vol. 2, no. 3, pp. 203-221.
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A well functioning and dynamic system of innovation financing is
an important tool for the development of future growth sectors. This
analysis of the dynamics of innovation financing by using the case of
Sweden shows the importance of government and venture capital in financing
innovation. It highlights two further important features. First, the role
of acquisitions in innovation financing identifies 'competent acquirers'
as active actors in the financing system; this is in addition to the
public sector and the venture capital industry. Second, innovation
financing differs by firms' technology specialization and industrial
sectors. In particular, technology-based service firms have different
financing patterns to that of manufacturing firms. The paper concludes
with a discussion on the functions of three important actors in financing
systems, namely government, venture capital, and competent acquirers.
Dharmappa, HB, Corderoy, RM & Hagare, P 2000, 'Developing an interactive multimedia software package to enhance understanding of and learning outcomes in water treatment processes', Journal of Cleaner Production, vol. 8, no. 5, pp. 407-411.
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Teaching and learning environments which use multimedia based resources greatly improve the effectiveness and efficiency of learning by engaging students at a deeper level than may otherwise be possible. This is particularly so in situations where `real world' phenomena and processes are being taught. Using such a multimedia package in teaching pollution control processes is novel. This paper reports on the successful development of a multimedia package dealing with several pollution control processes and its evaluation. The pollution control processes illustrated in the multimedia software are physico-chemical processes which are widely used in both water and wastewater treatment. Teaching the design concepts for these processes in a conventional classroom setting is challenging because students have difficulty in visualizing the techniques and processes involved. This difficulty is compounded by the fact that many of the processes occur naturally over longer time periods and so cannot be easily be integrated into normal teaching environments. The software package incorporates several different media modes including text, drawings, photographs, animation, and simulation. The preliminary pilot evaluation of this package using third year engineering students indicated that it provided greater insight and understanding of the complex treatment processes being taught.
Faber, MH, Val, DV & Stewart, MG 2000, 'Proof load testing for bridge assessment and upgrading', Engineering Structures, vol. 22, no. 12, pp. 1677-1689.
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Bridge deterioration with time and ever increasing traffic loads raise concerns about reliability of aging bridges. One of the ways to check reliability of aging bridges is proof load testing. A successful proof load test demonstrates immediately that the resistance of a bridge is greater than the proof load. This reduces uncertainty in the bridge resistance and so increases the bridge reliability. The paper considers a reliability-based calibration of intensities of proof loads for aging bridges to verify either an existing or increased load rating taking into account possible bridge deterioration. Intensities of proof loads are calibrated based on a consistent target reliability index. The influence of test risk, dead to live load ratio, and uncertainties associated with dead and live loads and bridge resistance is considered. The results presented in the paper relate to short and medium span bridges. © 2000 Elsevier Science Ltd.
Fang, JQ, Li, QS, Liu, DK, Jeary, AP & Wong, CK 2000, 'Wind effects on a very tall building and wavelet analysis', Proceedings of the Institution of Civil Engineers - Structures and Buildings, vol. 140, no. 2, pp. 151-159.
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This paper describes the results obtained from full-scale measurements of wind effects on a 70-storey building which has a height of approximately 370 m and is the second tallest structure in Hong Kong. The field data presented include the wind speed, wind direction and wind-induced response, which were measured at the top of this building during the passage of Typhoon Sally in 1996. Application of a wavelet transform to analyse the field data of wind velocity and wind-induced response is presented and discussed. The variation in the local energy content, not accounted for in Fourier spectral analysis, is noted. The comparison of the Fourier spectrum and wavelet scalogram is made.
Foroughipour, SM & Esselle, KP 2000, 'Analysis of coupling between inclined microstrip patch antennas using enhanced FDTD technique', Electronics Letters, vol. 36, no. 9, pp. 795-795.
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Gabrys, B & Bargiela, A 2000, 'General fuzzy min-max neural network for clustering and classification', IEEE Transactions on Neural Networks, vol. 11, no. 3, pp. 769-783.
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Ge, Y & Esselle, KP 2000, 'Computation of the radiation patterns of a rectangular dielectric-resonator antenna using the method of moments', Microwave and Optical Technology Letters, vol. 27, no. 6, pp. 382-384.
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Gibson, T, Bogduk, N, Macpherson, J & McIntosh, A 2000, 'Crash Characteristics of Whiplash Associated Chronic Neck Pain', Journal of Musculoskeletal Pain, vol. 8, no. 1-2, pp. 87-95.
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Objective: To analyze the motor vehicle crash parameters associated with chronic neck pain outcomes associated with whiplash injury. Method: Police accident data were matched with a clinical database of 273 subjects with chronic neck pain as a result of a motor vehicle crash. These subjects had or were in the process of being objectively investigated for zygapophyseal [Z-joint] pain by means of controlled double-blind differential diagnostic anesthetic blocks. The combined database was analyzed to find the crash parameters. Results: For the 92 cases where the crash data was able to be matched with the clinical data, females [55%] had slightly higher representation than males [45%]; rear-end impacts were more common [40%] and few had injuries requiring hospitalization [6.5%]. Higher severity crashes appeared to be associated with these chronic neck pain sufferers than typically found for whiplash associated disorder. For this group of drivers and motorcycle riders, 68 [74%] were diagnosed to have objective Z-joint pain mostly at the C2/3 [34%] and C5/6 [32%] levels of the neck. More symptomatic joints were found on the right side [59%] than left side [43%]. Conclusion: In Australia, the characteristics of the motor vehicle crashes associated with subjects suffering chronic neck pain were investigated. In the 92 cases analyzed, 74% had objective evidence that the chronic neck pain was connected with the Z-joints and seemed to be associated with more severe rear-end rear impacts.
Gin-Der Wu & Chin-Teng Lin 2000, 'Word boundary detection with mel-scale frequency bank in noisy environment', IEEE Transactions on Speech and Audio Processing, vol. 8, no. 5, pp. 541-554.
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Gowripalan, N, Sirivivatnanon, V & Lim, CC 2000, 'Chloride diffusivity of concrete cracked in flexure', CEMENT AND CONCRETE RESEARCH, vol. 30, no. 5, pp. 725-730.
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Guo, Y, Wang, X, Zhu, J & Ramsden, VS 2000, 'Analysis of Circulating Currents among the Stator Bar Strands of Large Turbine-generators', Journal of Huazhong University of Science and Technology, vol. 28, no. 4, pp. 83-86.
Guo, Y, Wang, X, Zhu, J & Ramsden, VS 2000, 'Calculation of Parameters of Stator Hybrid Conductor in Large Turbo-generators', Journal of Huazhong University of Science and Technology, vol. 28, no. 4, pp. 80-82.
Guo, Y, Wang, X, Zhu, J & Ramsden, VS 2000, 'Simplified Calculation Model of Circulating Currents among the Stator Bar Strands of Electrical Machines', Journal of Huazhong University of Science and Technology, vol. 28, no. 5, pp. 89-91.
Guo, Y, Zhu, J & Ramsden, VS 2000, 'Calculation on Parameters and Performances of Claw Pole Permanent Magnet Synchronous Motors with Soft Magnetic Composite', Journal of Huazhong University of Science and Technology, vol. 28, no. 4, pp. 15-17.
Guo, Y, Zhu, J & Ramsden, VS 2000, 'Design Characteristics of Claw Pole Permanent Magnet Motors with Soft Magnetic Composite Core', Journal of Huazhong University of Science and Technology, vol. 28, no. 5, pp. 86-88.
Guo, Y, Zhu, J, Ramsden, VS & Wang, X 2000, 'Calculation of Cogging Torque in Claw Pole Permanent Magnet Synchronous Motors', Journal of Huazhong University of Science and Technology, vol. 28, no. 8, pp. 30-32.
Guo, Y, Zhu, J, Zhong, M & Ramsden, VS 2000, 'Measurement of Magnetic Properties of Soft Magnetic Composite under Rotating Magnetic Fields', Journal of Huazhong University of Science and Technology, vol. 28, no. 6, pp. 18-20.
Guo, YJ, Vadgama, S & Tanaka, Y 2000, 'Advanced base station technologies for UTRAN', Electronics & Communication Engineering Journal, vol. 12, no. 3, pp. 123-132.
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To achieve high capacity and to support high-data-rate services in the terrestrial access network (UTRAN) of the third generation Universal Mobile Telecommunications System (UMTS), it is essential to employ some advanced transceiver techniques at the base stations. In this paper, three such techniques are presented: adaptive antennas, multistage parallel interference cancellers and a new hybrid scheme. The operation principles and some simulation results of the techniques are given and some challenging implementation issues are discussed.
Ha, QP & Trinh, H 2000, 'A variable structure-based controller with fuzzy tuning for load-frequency control', International Journal of Power and Energy Systems, vol. 20, no. 3, pp. 146-154.
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This paper presents a variable structure-based approach to the load frequency control problem in electric power generation systems. This approach combines the salient features of both variable structure and fuzzy systems to achieve high-performance and robustness. Fuzzy tuning is proposed for this purpose to continuously adjust the controller parameters according to the area control error. Simulation results indicate that the control scheme is able to substantially enhance control performance in single-area and multi-area interconnected systems with non-reheat or reheat turbines. Furthermore, it is shown that the responses of the system employing the proposed controllers are quite insensitive to parameter changes and speed governor deadband, with or without generation rate constraints. The control strategy requires low computational cost and is amenable for practical implementation.
Ha, QP, Nguyen, QH, Rye, DC & Durrant-Whyte, HF 2000, 'Impedance control of a hydraulically actuated robotic excavator', AUTOMATION IN CONSTRUCTION, vol. 9, no. 5-6, pp. 421-435.
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In robotic excavation hybrid position/force control has been proposed for bucket digging trajectory following. In hybrid position/force control, the control mode is required to switch between position- and force-control depending on whether the bucket is in free space or in contact with the soil during the process. Alternatively, impedance control can be applied such that one control mode is employed in both free and constrained motion. This paper presents a robust sliding controller that implements impedance control for a backhoe excavator. The control law consists of three components: an equivalent control, a switching control and a tuning control. Given an excavation task in world space, inverse kinematic and dynamic models are used to convert the task into a desired digging trajectory in joint space. The proposed controller is applied to provide good tracking performance with attenuated vibration at bucket-soil contact points. From the control signals and the joint angles of the excavator, the piston position and ram force of each hydraulic cylinder for the axis control of the boom, arm, and bucket can be determined. The problem is then how to find the control voltage applied to each servovalve to achieve force and position tracking of each electrohydraulic system for the axis motion of the boom, arm, and bucket. With an observer-based compensation for disturbance force including hydraulic friction, tracking of the piston ram force and position is guaranteed using robust sliding control. High performance and strong robustness can be obtained as demonstrated by simulation and experiments performed on a hydraulically actuated robotic excavator. The results obtained suggest that the proposed control technique can provide robust performance when employed in autonomous excavation with soil contact considerations. (C) 2000 Elsevier Science B.V. All rights reserved.
Harmer, AR, McKenna, MJ, Sutton, JR, Snow, RJ, Ruell, PA, Booth, J, Thompson, MW, Mackay, NA, Stathis, CG, Crameri, RM, Carey, MF & Eager, DM 2000, 'Skeletal muscle metabolic and ionic adaptations during intense exercise following sprint training in humans', JOURNAL OF APPLIED PHYSIOLOGY, vol. 89, no. 5, pp. 1793-1803.
Heise, CE, O'Dowd, BF, Figueroa, DJ, Sawyer, N, Nguyen, T, Im, D-S, Stocco, R, Bellefeuille, JN, Abramovitz, M, Cheng, R, Williams, DL, Zeng, Z, Liu, Q, Ma, L, Clements, MK, Coulombe, N, Liu, Y, Austin, CP, George, SR, O'Neill, GP, Metters, KM, Lynch, KR & Evans, JF 2000, 'Characterization of the Human Cysteinyl Leukotriene 2 Receptor', Journal of Biological Chemistry, vol. 275, no. 39, pp. 30531-30536.
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The contractile and inflammatory actions of the cysteinyl leukotrienes (CysLTs), LTC4, LTD4, and LTE4, are thought to be mediated through at least two distinct but related CysLT G protein-coupled receptors. The human CysLT1 receptor has been recently cloned and characterized. We describe here the cloning and characterization of the second cysteinyl leukotriene receptor, CysLT2, a 346-amino acid protein with 38% amino acid identity to the CysLT1 receptor. The recombinant human CysLT2 receptor was expressed in Xenopus oocytes and HEK293T cells and shown to couple to elevation of intracellular calcium when activated by LTC4, LTD4, or LTE4. Analyses of radiolabeled LTD4 binding to the recombinant CysLT2 receptor demonstrated high affinity binding and a rank order of potency for competition of LTC4 = LTD4 >> LTE4. In contrast to the dual CysLT1/CysLT2 antagonist, BAY u9773, the CysLT1 receptor-selective antagonists MK-571, montelukast (Singulair(TM)), zafirlukast (Accolate(TM)), and pranlukast (Onon(TM)) exhibited low potency in competition for LTD4 binding and as antagonists of CysLT2 receptor signaling. CysLT2 receptor mRNA was detected in lung macrophages and airway smooth muscle, cardiac Purkinje cells, adrenal medulla cells, peripheral blood leukocytes, and brain, and the receptor gene was mapped to chromosome 13q14, a region linked to atopic asthma.
Hill, MJ, Ziolkowski, RW & Papapolymerou, J 2000, 'Simulated and measured results from a Duroid-based planar MBG cavity resonator filter', IEEE Microwave and Guided Wave Letters, vol. 10, no. 12, pp. 528-530.
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HUTVÁGNER, G, MLYNÁROVÁ, L & NAP, J-P 2000, 'Detailed characterization of the posttranscriptional gene-silencing-related small RNA in a GUS gene-silenced tobacco', RNA, vol. 6, no. 10, pp. 1445-1454.
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Posttranscriptional gene-silencing phenomena such as cosuppression and RNA interference are associated with the occurrence of small, about 21-23 nt short RNA species homologous to the silenced gene. We here show that the small RNA present in silenced tra
Indraratna, B & Redana, IW 2000, 'Numerical modeling of vertical drains with smear and well resistance installed in soft clay', CANADIAN GEOTECHNICAL JOURNAL, vol. 37, no. 1, pp. 132-145.
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Indraratna, B & Redana, IW 2000, 'Numerical modeling of vertical drains with smear and well resistance installed in soft clay', Canadian Geotechnical Journal, vol. 37, no. 1, pp. 132-145.
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This study describes the behavior of embankments stabilized with prefabricated vertical drains installed in soft clay foundations, based on several fully instrumented case histories selected from Thailand and Malaysia. A multidrain analysis is conducted based on an equivalent, plane strain model developed by the authors. The deformation of soft clay beneath an embankment (i.e., along and away from the centerline) is predicted and compared with the available field measurements. The effects of both smear and well resistance are incorporated in the analytical formulation, which is used in conjunction with the modified Cam-clay theory. It is demonstrated that the installation of vertical drains significantly increases the rate of settlement, improves the dissipation of pore-water pressure, and decreases the lateral deformation of the soft clay foundation. To obtain better predictions, especially of pore pressures and lateral displacements, the equivalent discharge capacity of the drains needs to be modeled appropriately. The inclusion of the effects of smear and well resistance in the analysis of vertical drains improves the accuracy of predictions significantly, in comparison with the field measurements.Key words: clay, consolidation, embankment, finite element method, settlement, smear zone, vertical drain.
Indraratna, B, Nemcik, JA & Gale, WJ 2000, 'Review and interpretation of primary floor failure mechanism at a longwall coal mining face based on numerical analysis', Géotechnique, vol. 50, no. 5, pp. 547-557.
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This paper describes the conceptual model of primary rock failure mechanisms in the floor ahead of the longwall coal mining face based on underground observations and numerical modelling. During longwall mining, the stress fields and displacements of strata are constantly changing. High stress concentrations ahead of the longwall face can initiate fractures in the rock floor that can, under unfavourable stress conditions, develop into secondary floor failure, where large displacements of strata can occur. Severely broken floor strata or floor heave can seriously interfere with mining operations. Underground observations indicate that the sub-vertical shear fractures and the shear failure along the bedding planes in stratified rock are the most common fracture types observed in the rock floor below the longwall face. To explain how these fractures occur, basic principles of rock failure mechanism are applied to an overstressed rock subject to stress concentrations typically found at the longwall face. The computational simulation of the progressive longwall mining operations was undertaken in stratified rock to model complex stress distributions ahead of the longwall face and to simulate the rock failure in the mining floor. The model indicates that the shear fractures and the bedding plane failure dominate the floor failure ahead of the moving longwall face, as was observed underground.
Jegatheesan, V 2000, 'Transient stage deposition of submicron particles in deep bed filtration under unfavorable conditions', Water Research, vol. 34, no. 7, pp. 2119-2131.
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Ji, JC & Hansen, CH 2000, 'Non-linear response of a post-buckled beam subjected to a harmonic axial excitation', JOURNAL OF SOUND AND VIBRATION, vol. 237, no. 2, pp. 303-318.
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An experimental investigation of the non-linear response of a clamped-sliding postbuckled beam subjected to a harmonic axial load is presented. Two types of resonances are considered: fundamental and subharmonic. The data demonstrate several non-linear phenomena including period-doubling sequence bifurcation, period-three, and chaotic motion. In addition, the effect of damping on the dynamic instability of the post-buckled beam is investigated. The regions of instability and chaotic response are shown for different damping levels. The resulting locus of instability of the periodic solutions in the amplitude-frequency parameter space provides valuable information on the overall dynamic behavior of the system. The qualitative changes can be observed when either the frequency or the amplitude of excitation is varied across a bifurcation curve. The measured data are illustrated through time histories, phase plots, Fourier spectra, and Poincare sections.
Ji, JC & Yu, L 2000, 'Drop dynamics of a high-speed unbalanced rotor in active magnetic bearing machinery', MECHANICS OF STRUCTURES AND MACHINES, vol. 28, no. 2-3, pp. 185-200.
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The transient nonlinear dynamics of a high-speed unbalanced rigid rotor dropping onto rigid sliding bearings is investigated. The equations of motion are formulated and solved numerically to examine dynamics of the rotor for different regimes of the touchdown process. The contribution of parameters such as unbalance, air gap, coefficient of friction, and coefficient of restitution to drop dynamics of the rotor are examined. When the unbalance is small, the resulting motion is also small. As the level of unbalance increases, the motion of the rotor becomes larger, so there is potential for damage to the rotor and the backup bearings. The orbits of the rotor in the backup bearings after the rotor drops, velocities, and power loss during sliding-whirling stages are presented for various initial conditions and system parameters. Finally, based on simulation results, some design guidelines and suggestions are given.
Ji, JC, Yu, L & Leung, AYT 2000, 'Bifurcation behavior of a rotor supported by active magnetic bearings', JOURNAL OF SOUND AND VIBRATION, vol. 235, no. 1, pp. 133-151.
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The non-linear dynamics of a rigid rotor levitated by active magnetic bearings is investigated. The vibrations in the horizontal and vertical directions are analyzed on the center manifold near the double-zero degenerate point by using normal-form method. The resulting normal forms in the horizontal and vertical directions are different due to the effect of rotor weight. It is shown that the vibratory behavior in the vertical direction can be reduced on the center manifold to the Bogdanov-Takens form. For the autonomous case, there exist saddle-node bifurcation and Hopf bifurcation for local analysis, and a saddle-connection bifurcation for global analysis. For non-autonomous case, the Melnikov technique is used to determine the critical parameter at which the homoclinic orbits intersect transversally. For the vibrations in the horizontal direction, the essential non-linear terms of the truncated normal form are third order. The behaviors of zero solutions are given. Finally, numerical simulations are performed to verify the analytical predictions.
Jia, D, Dutkiewicz, E & Chicharo, JF 2000, 'Performance analysis of QoS mechanisms in IP networks', Proceedings ISCC 2000. Fifth IEEE Symposium on Computers and Communications, pp. 359-363.
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Integrated services IP networks are expected to provide a variety of services with differentiated QoS. This requires the implementation of mechanisms that can discriminate service classes in terms of QoS. The IETF has recently proposed a Differentiated Services (Diffserv) framework for provision of QoS. In this paper we analyze performance of two Diffserv mechanisms: Threshold Dropping and Priority Scheduling in terms of packet loss and mean packet delay. A comparison of the two mechanisms is carried out with the requirement that both mechanisms provide the same level of packet loss for the preferred flow. This comparison extends the results reported in the literature for these two mechanisms. In particular, in this paper we determine the impact of buffer threshold and buffer size on packet loss and mean packet delay in these mechanisms.
Johnson, IR, Tellambura, C, Guo, YJ & Barton, SK 2000, 'HIPERLAN receiver design issues: noise performance and frequency offset compensation', International Journal of Wireless Information Networks, vol. 7, no. 1, pp. 29-41.
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This paper is concerned with some physical layer issues for HIPERLAN. First, the noise performance required of each class of receivers in HIPERLAN is determined. Secondly, the effect of frequency offset on the performance of equalisers is investigated and various techniques for joint equalisation and frequency offset compensation are studied. It is shown that by employing a decision feedback equaliser incorporating a second order phase locked loop, the effect of both the intersymbol interference and frequency offset can be significantly reduced. Using such a technique, the packet error ratio (PER) of a HIPERLAN radio link in a multipath channel is found by simulation.
Jones, G & Nguyen, TV 2000, 'Associations Between Maternal Peak Bone Mass and Bone Mass in Prepubertal Male and Female Children', Journal of Bone and Mineral Research, vol. 15, no. 10, pp. 1998-2004.
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Karaomerlioglu, DC & Jacobsson, S 2000, 'The Swedish venture capital industry: An infant, adolescent or grown-up?', Venture Capital, vol. 2, no. 1, pp. 61-88.
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This paper analyses the evolution of the Swedish venture capital (VC) industry. The institutional infrastructure in the form of legal access to available savings, the incentive structure and the exit possibilities for the VC firm initially blocked the evolution of the VC industry but institutional changes initiated a catch-up process in Sweden in the 1990s. The size of the Swedish VC industry is now substantial, among the four largest in the OECDset in relation to population. A distinct structural change in the Swedish VC industry in favour of diversity is also taking place but the industry is not yet mature with respect to its competence. The key policy issues are related not only to expanding the size of the industry, but also to increasing its competence. Further institutional change is, therefore, warranted, not only in terms of tax reforms and improving the access to pension funds and other savings, but also in terms of distinct policies aiming at increasing the flow of competence to the VC industry. © 2000 Taylor & Francis Ltd.
Khalili, N, Khabbaz, MH & Valliappan, S 2000, 'An effective stress based numerical model for hydro-mechanical analysis in unsaturated porous media', Computational Mechanics, vol. 26, no. 2, pp. 174-184.
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Kim, SK, Atanassov, KT & Shannon, AG 2000, 'Generalized nets in neurology: an example of mathematical modelling', International Journal of Mathematical Education in Science and Technology, vol. 31, no. 2, pp. 173-179.
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Kirkpatrick, D & McLaughlan, R 2000, 'Flexible lifelong learning in professional education', Educational Technology and Society, vol. 3, no. 1, pp. 24-31.
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Universities are continually seeking effective responses to the challenges created by the increased demand for continuing professional education from a diverse client group responding to the pressures for lifelong learning. The growth in information and communications technologies has created new environments in which learning can occur. New technologies open up possibilities for bringing together distributed learners and the opportunity to support interaction between learners from diverse geographical and life contexts. The challenge for educators is to develop teaching-learning approaches that support learners and develop the skills and knowledge necessary to perform more effectively in the workplace and to continue to learn. The professionally oriented subject Contaminated Sites Management was re-developed to incorporate electronically supported problem-oriented learning. The new subject integrated professional understanding and practice with existing subject content and incorporated flexibility into a subject that had traditionally been taught face-to-face. Subject design was based on principles of problem-oriented and experiential learning and included individual and team-work and a polluted sites simulation conducted within a webbased learning environment. The incorporation of computer mediated communications technologies provided flexible and responsive support for student interaction and communication. Students responded positively to these flexible teaching and learning approaches and the subject developed students' professional skills and knowledge successfully.
Kodagoda, KRS, Wijesoma, WS & Teoh, EK 2000, 'Stable fuzzy state space controllers for an AGV', Neural Networks for Signal Processing - Proceedings of the IEEE Workshop, vol. 2, pp. 672-681.
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The primary focus is on the development of an intelligent control scheme, which is insensitive to parametric uncertainty, load and parameter fluctuations and most importantly amenable for real time implementation. In this paper, we present a stable uncoupled direct fuzzy PD/PI control scheme for an outdoor AGV, which is a converted electrically powered golf-car. The controller performance was assessed both through simulations and experimental results. It was established that the fuzzy logic controller (FLC) yielded good performance even under uncertain and variable parameters in the model, unlike the computed torque technique (CTT) or conventional PID control. And in terms of real-time implementation the availability of custom fuzzy chips and the reduced computational complexity of the fuzzy controller as against the CTT, makes the fuzzy controller, an ideal choice amongst the two schemes.
Kwon, DY, Vigneswaran, S, Fane, AG & Ben Aim, R 2000, 'Experimental determination of critical flux in cross-flow microfiltration', SEPARATION AND PURIFICATION TECHNOLOGY, vol. 19, no. 3, pp. 169-181.
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Lal, SKL & Craig, A 2000, 'Psychophysiological effects associated with drowsiness: Driver fatigue and electroencephalography', INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY, vol. 35, no. 1, pp. 39-39.
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Landers, P, Kerr, KG, Rowbotham, TJ, Tipper, JL, Keig, PM, Ingham, E & Denton, M 2000, 'Survival and Growth of Burkholderia cepacia Within the Free-Living Amoeba Acanthamoeba polyphaga', European Journal of Clinical Microbiology & Infectious Diseases, vol. 19, no. 2, pp. 121-123.
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LAW, SS & ZHU, XQ 2000, 'STUDY ON DIFFERENT BEAM MODELS IN MOVING FORCE IDENTIFICATION', Journal of Sound and Vibration, vol. 234, no. 4, pp. 661-679.
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Lee, DK, Cheng, R, Nguyen, T, Fan, T, Kariyawasam, AP, Liu, Y, Osmond, DH, George, SR & O'Dowd, BF 2000, 'Characterization of Apelin, the Ligand for the APJ Receptor', Journal of Neurochemistry, vol. 74, no. 1, pp. 34-41.
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The apelin peptide was recently discovered and demonstrated to be the endogenous ligand for the G protein-coupled receptor, APJ. A search of the GenBank databases retrieved a rat ex pressed sequence tag partially encoding the preproapelin sequence. The GenBank search also revealed a human sequence on chromosome Xq25-26.1, containing the gene encoding preproapelin. We have used the rat sequence to screen a rat brain cDNA library to obtain a cDNA encoding the full-length open reading frame of rat preproapelin. This cDNA encoded a protein of 77 amino acids, sharing an identity of 82% with human preproapelin, Northern and in situ hybridization analyses revealed both human and rat apelin and APJ to be expressed in the brain and periphery. Both sequence and mRNA expression distribution analyses revealed similarities between apelin and angiotensin II, suggesting they that share related physiological roles. A synthetic apelin peptide was injected intravenously into male Wistar rats, resulting in immediate lowering of both systolic and diastolic blood pressure, which persisted for several minutes. Intraperitoneal apelin injections induced an increase in drinking behavior within the first 30 min after injection, with a return to baseline within 1 h.
Lee, DK, Lynch, KR, Nguyen, T, Im, D-S, Cheng, R, Saldivia, VR, Liu, Y, Liu, ISC, Heng, HHQ, Seeman, P, George, SR, O’Dowd, BF & Marchese, A 2000, 'Cloning and characterization of additional members of the G protein-coupled receptor family', Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression, vol. 1490, no. 3, pp. 311-323.
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A search of the expressed sequence tag (EST) database retrieved a human cDNA sequence which partially encoded a novel G protein-coupled receptor (GPCR) GPR26. A human genomic DNA fragment encoding a partial open reading frame (ORF) and a rat cDNA encoding the full length ORF of GPR26 were obtained by library screening. The rat GPR26 cDNA encoded a protein of 317 amino acids, most similar (albeit distantly related) to the serotonin 5- HT(5A) and gastrin releasing hormone BB2 receptors. GPR26 mRNA expression analysis revealed signals in the striatum, pons, cerebellum and cortex. HEK293 and Rh7777 cells transfected with GPR26 cDNA displayed high basal cAMP levels, slow growth rate of clonal populations and derangements of normal cell shape. We also used a sequence reported only in the patent literature encoding GPR57 (a.k.a. HNHCI32) to PCR amplify a DNA fragment which was used to screen a human genomic library. This resulted in the cloning of a genomic fragment containing a pseudogene, ψGPR57, with a 99.6% nucleotide identity to GPR57. Based on shared sequence identities, the receptor encoded by GPR57 was predicted to belong to a novel subfamily of GPCRs together with GPR58 (a.k.a. phBL5, reported only in the patent literature), putative neurotransmitter receptor (PNR) and a 5-HT4 pseudogene. Analysis of this subfamily revealed greatest identities (~56%) between the receptors encoded by GPR57 and GPR58, each with shared identities of ~40% with PNR. Furthermore, ψGPR57, GPR58, PNR and the 5-HT4 pseudogene were mapped in a cluster localized to chromosome 6q22-24. PNR and GPR58 were expressed in COS cells, however no specific binding was observed for various serotonin receptor-specific ligands. (C) 2000 Elsevier Science B.V.
Lee, S 2000, 'Oligomerization of Dopamine and Serotonin Receptors', Neuropsychopharmacology, vol. 23, no. 4, pp. S32-S40.
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Until recently, it has largely been assumed that G proteincoupled receptors (GPCRs) function as monomeric entities. However, over the past few years, we and others havedocumented that GPCRs can form dimers and oligomers, leading to a re-evaluation of the mechanisms thought tomediate GPCR function. Despite the growing number ofinvestigations into dimerization, little is known about thestructural basis of receptor-receptor interactions and thefunctional consequences of dimer formation. Here, wepresent a brief review of some insights we have gained intothe dimerization of dopamine and serotonin receptors. Wehave demonstrated that agonist-regulated trafficking isidentical for receptor monomers and dimers, however, agonist treatment appears to stabilise the receptor oligomers. An investigation of the structural assemblybetween receptors involved in dimerization showed thatthere are several sites of interaction including hydrophobictransmembrane domain interactions and intermoleculardisulphide bonds. We have also examined receptor hetero-oligomerization and demonstrated the potential for novelfunctions as a result of these associations. Finally, as aresult of these observations, we have been able to presentevidence that GPCRs function as oligomers in the cell. © 2000, American College of Neuropsychopharmacology.
Lee, SP, O'Dowd, BF, Ng, GYK, Varghese, G, Akil, H, Mansour, A, Nguyen, T & George, SR 2000, 'Inhibition of Cell Surface Expression by Mutant Receptors Demonstrates that D2 Dopamine Receptors Exist as Oligomers in the Cell', Molecular Pharmacology, vol. 58, no. 1, pp. 120-128.
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Numerous mutant G protein-coupled receptors with diminished or no function have been described that are naturally occurring or that are the product of gene manipulation. It has largely been assumed that receptor mutants do not affect the function of the wild-type receptor; however, the occurrence of G protein-coupled receptor dimerization suggests the possibility that an intermolecular interaction between mutant and wild-type receptors can occur. We have shown previously that the D2 dopamine receptor (D2DR) exists as dimers in cell lines and brain tissue. In this study, we demonstrated that mutant D2DR can modulate the function of the wild-type D2DR. While attempting to elucidate the structure of the D2DR dimer, we demonstrated that nonfunctional D2DR substitution and truncation mutants antagonized wild-type D2DR function. Furthermore, from analyses of this interaction between the receptor mutants and the D2DR, using photoaffinity labeling, we provide evidence that the D2DR is oligomeric in the cell.
Lei, QP, Shannon, AG, Heller, RK & Lamb, DH 2000, 'Quantification of free polysaccharide in meningococcal polysaccharide-diphtheria toxoid conjugate vaccines.', Dev Biol (Basel), vol. 103, pp. 259-264.
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A precipitation method using deoxycholate/HCI has been applied successfully to separate unconjugated free polysaccharide from carrier protein-bound material in meningococcal polysaccharide-diphtheria toxoid conjugate vaccines. The method effectively separated free and bound polysaccharide in conjugate vaccines prepared from Neisseria meningitidis serotypes A, C, W135 and Y. Free polysaccharide remained in the supernatant after deoxycholate treatment while protein-bound polysaccharide was fully precipitated. Testing by both colorimetric assay and high performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD) has confirmed the selective loss of protein-bound polysaccharide in samples of conjugate vaccine or conjugate vaccine mixed with known amounts of free polysaccharide. This rapid separation method requires minimum sample handling and is specific, reproducible, and allows assessment of free polysaccharide levels in vaccines at final container concentration.
Li, H 2000, 'An assessment of depolarisation models of crossflow microfiltration by direct observation through the membrane', Journal of Membrane Science, vol. 172, no. 1-2, pp. 135-147.
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Li, J, Dong, G & Ramamohanarao, K 2000, 'Making Use of the Most Expressive Jumping Emerging Patterns for Classification', Knowledge Discovery And Data Mining, Proceedings: Current Issues And New Applications, vol. 1805, no. NA, pp. 220-232.
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Classification aims to discover a model from training data that can be used to predict the class of test instances. In this paper, we propose the use of jumping emerging patterns (JEPs) as the basis for a new classifier called them JEP-Classifier. Each J
Li, QS, Fang, JQ & Liu, DK 2000, 'Exact Solutions for Free Vibration of Single-Degree-of-Freedom Systems with Nonperiodically Varying Parameters', Journal of Vibration and Control, vol. 6, no. 3, pp. 449-462.
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An analysis of free vibration of single-degree-of-freedom (SDoF) systems with nonperiodically varying parameters, such as variable mass and stiffness, is presented and discussed in this paper The vari ations, relative to time, of mass and stiffness are expressed by the selection of suitable expressions such as power functions and exponential functions, and the general governing differential equation for free vi bration of SDoF systems with nonperiodically varying parameters is established. The exact solutions for free vibration of such time-varying systems are derived. The obtained solutions demonstrate that free vibra tion of several undamped systems with nonperiodically varying parameters cannot be induced by an initial disturbance.
Li, QS, Fang, JQ, Jeary, AP, Wong, CK & Liu, DK 2000, 'Evaluation of wind effects on a supertall building based on full-scale measurements', Earthquake Engineering and Structural Dynamics, vol. 29, no. 12, pp. 1845-1862.
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This paper describes the results obtained from the full-scale measurements of wind effects on a 70-storey building in Hong Kong. The building which has a height of approximately 370 m is the second tallest structure in Hong Kong. The field data such as wind speed, wind direction and wind-induced acceleration responses have been measured since 1995 including the close passage of two typhoons; typhoon Sally and typhoon Kent. Detailed analysis of the field data is conducted. The full-scale measurements are compared with the wind tunnel results obtained in the Boundary Layer Wind Tunnel Laboratory at Western Ontario University. The amplitude-dependent characteristics of damping and natural frequency that were obtained by using the random decrement technique are investigated. Copyright (C) 2000 John Wiley and Sons, Ltd.
Li, QS, Li, GQ & Liu, DK 2000, 'Exact solutions for longitudinal vibration of rods coupled by translational springs', International Journal of Mechanical Sciences, vol. 42, no. 6, pp. 1135-1152.
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Li, QS, Liu, DK, Fang, JQ & Tam, CM 2000, 'Multi-level optimal design of buildings with active control under winds using genetic algorithms', Journal of Wind Engineering and Industrial Aerodynamics, vol. 86, no. 1, pp. 65-86.
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Li, QS, Liu, DK, Fang, JQ, Jeary, AP & Wong, CK 2000, 'Damping in buildings: its neural network model and AR model', Engineering Structures, vol. 22, no. 9, pp. 1216-1223.
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Li, QS, Liu, DK, Leung, AYT, Zhang, N, Tam, CM & Yang, LF 2000, 'Modelling of structural response and optimization of structural control system using neural network and genetic algorithm', Structural Design of Tall Buildings, vol. 9, no. 4, pp. 279-293.
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This paper proposes an integrated approach to the modelling and optimization of structural control systems in tall buildings. In this approach, an artificial neural network is applied to model the structural dynamic responses of tall buildings subjected to strong earthquakes, and a genetic algorithm is used to optimize the design problem of structural control systems, which constitutes a mixed-discrete, nonlinear and multi-modal optimization problem. The neural network model of the structural dynamic response analysis is included in the genetic algorithm and is used as a module of the structural analysis to estimate the dynamic responses of tall buildings. A numerical example is presented in which the general regression neural network is used to model the structural response analysis. The modelling method, procedure and the numerical results are discussed. Two Los Angeles earthquake records are adopted as earthquake excitations.
Liang, W, Orlowska, ME & Yu, JX 2000, 'Optimizing multiple dimensional queries simultaneously in multidimensional databases', The VLDB Journal The International Journal on Very Large Data Bases, vol. 8, no. 3-4, pp. 319-338.
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Lim, CC, Gowripalan, N & Sirivivatnanon, V 2000, 'Microcracking and chloride permeability of concrete under uniaxial compression', CEMENT & CONCRETE COMPOSITES, vol. 22, no. 5, pp. 353-360.
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Lin, CT, Chung, IF & Sheu, LKM 2000, 'A neural fuzzy system for image motion estimation', Fuzzy Sets and Systems, vol. 114, no. 2, pp. 281-304.
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Lin, C-T, Juang, C-F & Li, C-P 2000, 'Water bath temperature control with a neural fuzzy inference network', Fuzzy Sets and Systems, vol. 111, no. 2, pp. 285-306.
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Locke, M & Indraratna, B 2000, 'A new model for the behavioue of granular filters', Australian Geomechanics Journal, vol. 35, no. 3, pp. 31-39.
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Filters are used in Geotechnical Engineering to control seepage and to prevent erosion of soil due to the drag forces of seeping water. Filters act as tarriers to retain the base soil while allowing seepage flows to exit without causing high hydraulic gradients or pore pressures which may damage the structure. This paper describes a new analytical model of filtration. The model is based on a three dimensional network model of the filter pores, and the equations of conservation of mass and momentum which govern the rate of particle transport The model has application in the design of granular filters for protecting non-cohesive base soils in embankment dams, retaining walls, drainage wells or road pavements.
Lowe, DB, Scott, CA & Bagia, R 2000, 'A skills development framework for learning computing tools in the context of engineering practice', European Journal of Engineering Education, vol. 25, no. 1, pp. 45-56.
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Informatics is a first-year subject in the new Bachelor of Engineering/Graduate Diploma in Engineering Practice degree at the University of Technology, Sydney. All undergraduate engineering students must do this subject irrespective of their intended engineering discipline (civil, mechanical, environmental systems, electrical, telecommunications, computer systems). The focus of this subject is to introduce students to computational tools (such as spreadsheets and programming languages) and information retrieval tools (such as the World Wide Web), which support engineering, as well as looking at the effective and professional use of these tools. Informatics has three core elements: the development of specific skills which will assist students in both their studies and their professional practice; the development of an ability to continue to develop further skills independently; and consideration of a wide variety of issues related to the computational tools that the students are using. Examples of the issues covered include: privacy; accuracy of content; fraud; security; the professional and ethical responsibility of engineers for the results of their calculations; selecting the best tool for the job; and limitations of computational tools. This paper will review the activities and challenges the students faced, describe the approaches that we adopted and the various issues we raised, the expected and actual outcomes arising from the activities, and our plans for the future of the subject. © 2000 Taylor & Francis Ltd.
Lowe, DB, Scott, CA & Bagia, R 2000, 'A skills development framework for learning computing tools in the context of engineering practice', European Journal of Engineering Education, vol. Volume 1, no. 0, pp. 45-56.
Luk, KC, Ball, JE & Sharma, A 2000, 'A study of optimal model lag and spatial inputs to artificial neural network for rainfall forecasting', JOURNAL OF HYDROLOGY, vol. 227, no. 1-4, pp. 56-65.
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Lukasiak, J & Burnett, IS 2000, 'Exploiting simultaneously masked linear prediction in a WI speech coder', 2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421), pp. 11-13.
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Lukasiak, J & Burnett, IS 2000, 'Exploring the characteristics of analytic decomposition of speech signals', 2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421), pp. 59-61.
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Lukasiak, J, Burnett, IS, Chicharo, JF & Thomson, MM 2000, 'Linear prediction incorporating simultaneous masking', 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100), vol. 3, pp. 1471-1474.
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Marengo, EA & Ziolkowski, RW 2000, 'A new procedure for specifying nonradiating current distributions and the fields they produce', Journal of Mathematical Physics, vol. 41, no. 2, pp. 845-866.
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Marengo, EA & Ziolkowski, RW 2000, 'Description of random radiating and nonradiating sources', Physical Review E, vol. 62, no. 3, pp. 4465-4468.
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Marengo, EA & Ziolkowski, RW 2000, 'Inverse source problem with regularity constraints: normal solution and nonradiating source components', Journal of Optics A: Pure and Applied Optics, vol. 2, no. 3, pp. 179-187.
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Marengo, EA & Ziolkowski, RW 2000, 'Nonradiating and minimum energy sources and their fields: generalized source inversion theory and applications', IEEE Transactions on Antennas and Propagation, vol. 48, no. 10, pp. 1553-1562.
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Marengo, EA, Devaney, AJ & Ziolkowski, RW 2000, 'Inverse source problem and minimum-energy sources', Journal of the Optical Society of America A, vol. 17, no. 1, pp. 34-34.
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Marjanovic, O 2000, 'Supporting the 'soft' side of business process reengineering.', Bus. Process. Manag. J., vol. 6, no. 1, pp. 43-55.
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The contemporary business environment in which an organisation exists is becoming increasingly dynamic. The pressing need to improve the existing business processes in an organisation, results in the appearance of a new field called Business Process Reengineering (BPR). However, despite more and more innovative technological solutions for business processes, resistance to change continues to be the biggest BPR obstacle. According to many experts, this is the main reason why reengineering projects in many organisations fail. This paper investigates the “soft” side of BPR (i.e. its human aspects). More precisely, it focuses on ways information technology (IT), in particular group support systems (GSS), can support the soft side of BPR and reduce resistance to change. In this way, the paper introduces the third level of integration of IT and BPR, in addition to the two levels already described in the literature. The approach is illustrated by an example of a company that used GSS during its reengineering efforts. © 2000, MCB UP Limited
Mastio, EA, Cranton, WM & Thomas, CB 2000, 'Pulsed laser annealing for high-efficiency thin film electroluminescent devices', Journal of Applied Physics, vol. 88, no. 3, pp. 1606-1611.
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Mastio, EA, Fogarassy, E, Cranton, WM & Thomas, CB 2000, 'Ablation study on pulsed KrF laser annealed electroluminescent ZnS:Mn/Y2O3 multilayers deposited on Si', Applied Surface Science, vol. 154-155, pp. 35-39.
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Mastio, EA, Thomas, CB, Cranton, WM & Fogarassy, E 2000, 'The effects of multiple KrF laser irradiations on the electroluminescence and photoluminescence of rf-sputtered ZnS:Mn-based electroluminescent thin film devices', Applied Surface Science, vol. 157, no. 1-2, pp. 74-80.
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McGloin, D & Dunn, MH 2000, 'Simple theory of microwave induced transparency in atomic and molecular systems', Journal of Modern Optics, vol. 47, no. 11, pp. 1887-1897.
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In recent years the idea of electromagnetically induced transparency in atomic systems using a microwave coupling field has been discussed. We present theoretical work on how this may be achieved in both Doppler systems, and by extension in non-Doppler broadened systems. By considering the specific example of atomic rubidium we demonstrate the feasibility and practical difficulties of such an experiment. By considering systems with appropriate rotational-vibration structure we conclude that microwave induced transparency in gas vapours is more readily achievable in molecular systems. © 2000 Taylor & Francis Group, LLC.
McGloin, D, Dunn, MH & Fulton, DJ 2000, 'Polarization effects in electromagnetically induced transparency', Physical Review A, vol. 62, no. 5.
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McGloin, D, Turnbull, GA & Dunn, MH 2000, 'Electromagnetically induced focussing effects in four level media', Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series, pp. 64-65.
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An attempt was made to model the refraction due to two different Rabi frequencies, a lower value of 120 MHz corresponding to the outer edge of the coupling field and a higher one of 300 MHz corresponding to the center of the coupling field. The difference in the refraction produced by these two Rabi frequencies gave a measure of the lensing action on the probe. Positive values of this difference imply a converging lens, while negative values imply a diverging lens.
Mcnie, CM, Barton, DC, Ingham, E, Tipper, JL, Fisher, J & Stone, MH 2000, 'The prediction of polyethylene wear rate and debris morphology produced by microscopic asperities on femoral heads', Journal of Materials Science: Materials in Medicine, vol. 11, no. 3, pp. 163-174.
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Mengkang Peng, Sasabo, MF, Hingjie Jay Guo, Downing, OJ & Barton, SK 2000, 'Frame-extended linear decorrelating detector for asynchronous CDMA', IEEE Transactions on Vehicular Technology, vol. 49, no. 5, pp. 1918-1927.
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Missiroli, M, Yingjie Jay Guo & Barton, SK 2000, 'Near-far resistant channel estimation for CDMA systems using the linear decorrelating detector', IEEE Transactions on Communications, vol. 48, no. 3, pp. 514-524.
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The well-known linear decorrelating detector (LDD) for direct-sequence code-division multiple-access (CDMA) systems provides near-far resistant performance when the timing of each user is accurately known. Traditional CDMA acquisition techniques suffer from high differences in power levels. The estimation accuracy for a user overwhelmed by stronger ones is likely to be unsatisfactory; at the same time, the interference from a user undergoing acquisition or tracking is not removed by the standard LDD. In this paper, a fully near-far resistant technique for acquisition and tracking for asynchronous CDMA systems applying the LDD is proposed, considering realistic band-limited signals. This technique is based on the adoption of a pair of special sequences equivalent to a dedicated access channel and is shown to provide a relatively fast and robust means to perform channel estimation both in case of single- and multipath channels.
Mitchell, AD, Loganathan, P, Payn, TW & Tillman, RW 2000, 'Magnesium fertiliser dissolution rates in pumice soils under Pinus radiata', AUSTRALIAN JOURNAL OF SOIL RESEARCH, vol. 38, no. 3, pp. 753-767.
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Application of Mg fertilisers has been suggested as a means of reducing the incidence of Mg deficiency of forest trees in New Zealand and Europe. The objective of this study was to determine the rates of dissolution of a range of Mg fertilisers applied to a pumice soil (Typic Udivitrand). The rate of fertiliser dissolution was little influenced by whether the fertiliser was applied directly on to the soil surface (litter removed) or on to the litter layer in a Pinus radiata plantation. Twenty-seven months since fertiliser application the mean (with and without litter) percentage of Mg dissolved was in the sequence: Epsom salts > calcined magnesite 1-2 mm > granmag (a partially acidulated and granulated calmag product) > calcined magnesite 2-4 mm > forestry grade dolomite. The specific dissolution rate constants (μg/cm2.day of fertiliser) for the slowly soluble Mg fertilisers calculated using an elemental sulfur oxidation cubic model were 587 for calcined magnesite 1-2 mm, 426 for calcined magnesite 2-4 mm, 385 for granmag, and 18 for forestry grade dolomite. In a laboratory incubation study the elemental sulfur oxidation cubic model described the rate of dissolution of Mg fertilisers within narrow fertiliser particle size ranges. The specific fertiliser dissolution rate constants, however, increased with decreases in particle size, suggesting that the rate of dissolution depends on factors other than surface area when particle sizes varied widely. Slowly soluble, alkaline Mg fertilisers had a significant liming effect on the soil. They were more effective in increasing soil exchangeable Mg than soluble Mg salts over a long-period and therefore, they are better fertilisers for P. radiata.
Nemcik, JA 2000, 'Floor failure analysis at a longwall mining face based on the multiple sliding block model', Geotechnical and Geological Engineering, vol. 18, no. 3, pp. 175-192.
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This paper presents an analytical model of a floor failure at a longwall coal mining face based on the multiple sliding block model. During longwall mining, stresses and displacements of strata are constantly changing. High stress concentrations at the coal face can exceed the rock strength and initiate fractures in the strata that can, under unfavourable conditions, lead to large floor displacements and disruption of mining operations. Underground observations of the rock floor and the computational modelling of the longwall face indicate that two types of fracture dominate floor failure. Extensive lateral fracturing often develops along the numerous weak bedding planes that are typically present in the sedimentary strata while sub-vertical fractures form in response to changing stress abutments ahead of the longwall coal face. The fractures that initially develop ahead of the longwall face are subject to a "secondary" movement when exposed ahead of the longwall supports. In response to the stress relief as the coal is mined from above. Strata move towards the opening and bending of the floor occurs. If fractures in the floor exist, the floor blocks will displace in response to the floor movement and interact at the fractured surfaces. This analysis attempts to explain how the stress distribution develops within the broken floor during an active movement of floor strata leading to high stress concentrations at the floor level. The analytical formulation in this paper is supplemented by numerical modelling, and results are presented to verify that the analytical solutions are in accordance with the numerical predictions.
Ngamaramvaranggul, V & Webster, MF 2000, 'Computation of free surface flows with a Taylor-Galerkin/pressure-correction algorithm', International Journal for Numerical Methods in Fluids, vol. 33, no. 7, pp. 993-1026.
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A semi-implicit Taylor-Galerkin/pressure-correction finite element scheme (STGFEM) is developed for problems that manifest free surfaces associated with the incompressible creeping flow of Newtonian fluids. Such problems include stick-slip and die-swell flows, both with and without a superimposed drag flow, and for plane, axisymmetric and annular systems. The numerical solutions are compared with available analytical and numerical solutions, both in the neighbourhood of singularities and elsewhere. Close correspondence in accuracy is extracted from the literature for both stick-slip and die-swell flows. Stick-slip flow is used as a precursor study to the more complex free surface calculations involved for die-swell in extrudate flow. Two different free surface techniques are reported and results are analysed with mesh refinement and varying structure. Copyright (C) 2000 John Wiley and Sons, Ltd.
Ngo, HH, Vigneswaran, S, Kim, SH, Bidkar, A & Moon, H 2000, 'Microfiltration-adsorption hybrid system in organics removal from water', Water Science and Technology, vol. 41, no. 10-11, pp. 51-57.
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A series of experiments was conducted with a Millipore flat plate microfiltration module modified to incorporate in-line powdered activated carbon (PAC) addition. In-line PAC was mixed continuously through a spiral mixing device for a predetermined time prior entering a membrane unit. The results showed that this system is excellent in removing fulvic acid (FA). This system provides to sufficient contact time for PAC to adsorb organics compared to the system with in-line adsorbent addition. More than 85% of FA was removed from water containing 8 mg/l of FA. To achieve this following conditions were used:.(i) a velocity gradient G (mixing intensity) of 160.4 s–1; (ii) a hydraulic residence time (mixing time) of 4 minutes; (iii) a PAC dose of 260 mg/l; and (iv) membrane pore size of 0.22 μm. In case of low FA concentration (e.g. 1.2 mg/l) in water, the removal efficiency was almost 100%. The removal efficiency also increased with the increase of mixing intensity and mixing time. The permeate flux slightly improved when a membrane of pore size 0.22 μm was used with shorter hydraulic residence time and lower PAC concentration. This paper presents a mathematical model developed based on surface diffusion. The model successfully predicted the performance of this hybrid system.
Nguyen, TV & Eisman, JA 2000, 'Assessment of Significant Change in BMD: A New Approach', Journal of Bone and Mineral Research, vol. 15, no. 2, pp. 369-370.
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Nguyen, TV & Eisman, JA 2000, 'Genetics of Fracture: Challenges and Opportunities', Journal of Bone and Mineral Research, vol. 15, no. 7, pp. 1253-1256.
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Nguyen, TV, Blangero, J & Eisman, JA 2000, 'Genetic Epidemiological Approaches to the Search for Osteoporosis Genes', Journal of Bone and Mineral Research, vol. 15, no. 3, pp. 392-401.
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Nguyen, TV, Center, JR & Eisman, JA 2000, 'Association between breast cancer and bone mineral density: the Dubbo Osteoporosis Epidemiology Study', Maturitas, vol. 36, no. 1, pp. 27-34.
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Nguyen, TV, Center, JR & Eisman, JA 2000, 'Osteoporosis in Elderly Men and Women: Effects of Dietary Calcium, Physical Activity, and Body Mass Index', Journal of Bone and Mineral Research, vol. 15, no. 2, pp. 322-331.
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Nguyen, TV, Pocock, NA & Eisman, JA 2000, 'Interpretation of Bone Mineral Density Measurement and Its Change', Journal of Clinical Densitometry, vol. 3, no. 2, pp. 107-119.
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O'Dowd, BF, Lee, DK, Huang, W, Nguyen, T, Cheng, R, Liu, Y, Wang, B, Gershengorn, MC & George, SR 2000, 'TRH-R2 exhibits similar binding and acute signaling but distinct regulation and anatomic distribution compared with TRH-R1.', Mol Endocrinol, vol. 14, no. 1, pp. 183-193.
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TRH (thyroliberin) is a tripeptide (pGlu-His-ProNH2) that signals via G protein-coupled receptors. Until recently, only a single receptor for TRH was known (TRH-R1), but two groups identified a second receptor, TRH-R2. We independently discovered TRH-R2. Using an extensive set of TRH analogs, we found no differences in TRH-R1 and TRH-R2 binding or in acute stimulation of signaling. TRH-R2 was more rapidly internalized upon binding TRH and exhibited a greater level of TRH-induced down-regulation than TRH-R1. During prolonged exposure to TRH, cells expressing TRH-R2 exhibited a lower level of gene induction than cells expressing TRH-R1. TRH-R2 receptor mRNA was present in very discrete nuclei and regions of rat brain. A major mRNA transcript for TRH-R2 was seen in the cerebral cortex, pons, thalamus, hypothalamus, and midbrain with faint bands found in the striatum and pituitary. The extensive distribution of TRH-R2 in the brain suggests that it mediates many of the known functions of TRH that are not transduced by TRH-R1. The variations in agonist-induced internalization and down-regulation/desensitization, and anatomic distribution of TRH-R2 compared with TRH-R1, suggest important functional differences between the two receptors.
Oppermann, I & Rapajic, PB 2000, 'Capacity of a band-limited CDMA MMSE receiver-based system when combined with trellis or convolutional coding', IEEE Transactions on Communications, vol. 48, no. 8, pp. 1328-1337.
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Oppermann, I, van Rooyen, P & Kohno, R 2000, 'Guest editorial spread spectrum for global communications II', IEEE Journal on Selected Areas in Communications, vol. 18, no. 1, pp. 1-5.
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Parfitt, AJ & Bird, TS 2000, 'Phased array antenna analysis using time delay beam steering and hybrid FDTD method', Electronics Letters, vol. 36, no. 2, pp. 108-108.
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Parry, JJ, Burnett, IS & Chicharo, JF 2000, 'Language-specific phonetic structure and the quantisation of the spectral envelope of speech', Speech Communication, vol. 32, no. 4, pp. 229-250.
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Peat, KS & Kirby, R 2000, 'Acoustic wave motion along a narrow cylindrical duct in the presence of an axial mean flow and temperature gradient', The Journal of the Acoustical Society of America, vol. 107, no. 4, pp. 1859-1867.
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Pemper, Y, Heyman, E, Kastner, R & Ziolkowski, RW 2000, 'Hybrid Ray-Fdtd Moving Coordinate Frame Approach for Long Range Tracking of Collimated Wavepackets - Abstract', Journal of Electromagnetic Waves and Applications, vol. 14, no. 8, pp. 1115-1117.
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Pemper, Y, Lomakin, V, Heyman, E & Ziolkowski, RKRW 2000, 'Moving Coordinate Frame FDTD Analysis of Long Range Tracking of Pulsed Fields in Graded Index Waveguides', Progress In Electromagnetics Research, vol. 26, pp. 133-164.
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Pemper, Y, Lomakin, V, Heyman, E, Kastner, R & Ziolkowski, RW 2000, 'Moving Coordinate Frame FDTD Analysis of Long Range Tracking of Pulsed Fields in Graded Index Waveguides- Abstract', Journal of Electromagnetic Waves and Applications, vol. 14, no. 4, pp. 493-496.
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Perry, SW & Guan, L 2000, 'Weight assignment for adaptive image restoration by neural networks', IEEE Transactions on Neural Networks, vol. 11, no. 1, pp. 156-170.
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Perry, SW & Wyber, RJ 2000, 'A Hopfield neural network approach for the reconstruction of wide-bandwidth sonar data', Neural Networks for Signal Processing X. Proceedings of the 2000 IEEE Signal Processing Society Workshop (Cat. No.00TH8501), pp. 876-885.
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Petersen, DR, Link, RE, Wu, C, Hao, H & Zhou, Y 2000, 'Statistical Properties of the Bukit Timah Granite in Singapore', Journal of Testing and Evaluation, vol. 28, no. 1, pp. 36-36.
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Popescu, DC & Bone, D 2000, 'Combinatorial approach to representing subsets of coefficients for signal compression schemes', Electronics Letters, vol. 36, no. 8, pp. 760-760.
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PRADHAN, B & KUMAR, S 2000, 'Finite Element Analysis of Low-Velocity Impact Damage in Composite Laminates', Journal of Reinforced Plastics and Composites, vol. 19, no. 4, pp. 322-339.
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Pradhan, B & Kumar, S 2000, 'Finite Element Analysis of Low-Velocity Impact Damage in Composite Laminates', Journal of Reinforced Plastics and Composites, vol. 19, no. 4, pp. 322-339.
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This paper investigates the low-velocity impact behaviour and impact-induced damages in graphite/epoxy composite laminates. A three-dimensional finite element and transient dynamic analysis is performed to calculate the time-varying displacements, forces, strains and stresses throughout the laminate resulting from transverse impact. A layered version of an eight-noded isoparametric brick element with incompatible modes is used to model the laminate. Transient dynamic equilibrium equation is integrated step-by-step with respect to time using Newmark direct time integration method. Modified Hertzian contact law is used to model the local contact behaviour. Appropriate three-dimensional failure criteria are used for predicting the occurrence of matrix cracking and the extent of delamination after impact.
Raad, RS, Dutkiewicz, E & Chicharo, J 2000, 'Connection admission control in micro-cellular multi-service mobile networks', Proceedings ISCC 2000. Fifth IEEE Symposium on Computers and Communications, pp. 600-606.
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This paper investigates the use of fixed bandwidth reservation for Multi-service mobile networks. In particular it extends previous fixed Multi-service network results to the mobile scenario and presents analytical and simulation results for new and handover call blocking probabilities. It also investigates the performance sensitivity to different traffic load ratios as well as the cell dwell time distribution.
Ramirez, CD, Sleiman, RJ, Catchpoole, DR & Stewart, BW 2000, 'Morphological and molecular evidence of differentiation during etoposide-induced apoptosis in human lymphoblastoid cells', Cell Death & Differentiation, vol. 7, no. 6, pp. 548-555.
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The relationship between apoptosis and cell differentiation has been a subject for continuous debate, with evidence showing leukaemic cell differentiation and drug-induced apoptosis have reciprocal, interdependent and a highly schedule-dependent relationship. We have addressed this relationship in terms of a widely-used model for apoptosis induced by cytotoxic drugs: namely the effect of etoposide on CEM cells. In respect of commitment toward differentiation, we assessed changes in expression of marker genes and the level of CD3 antigenicity. Changes in these parameters following exposure of CEM cells to etoposide was similar to that observed following treatment of the same cells with phorbol 12-myristate 13-acetate (PMA), though this latter treatment did not cause cell death. Similarities in response to etoposide and PMA also included generation of 50 kilobase fragmentation of DNA and convolution of nuclei as assessed by transmission electron microscopy. However, condensation of chromatin and externalization of phosphatidylserine were only recorded in response to the cytotoxic drug and not in response to PMA. The data are consistent with apoptosis in these lymphoblastoid cells being accompanied by activation of specific markers of T-cell differentiation, but ultimately involving processes unequivocally associated with cell death.
Ramsden, VS, Watterson, PA, Holliday, WM, Tansley, GD, Reizes, JA & Woodard, JC 2000, 'A rotary blood pump', Journal of Electrical and Electronics Engineering, Australia, vol. 20, no. 1, pp. 17-22.
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This paper describes aspects of a new rotary blood pump for long term implantation as a left ventricular assist device. The combination of centrifugal pump, hydrodynamic blood-lubricated bearings, integrated impeller/rare earth magnet rotor, and double-sided axial-flux brushless-DC motor is unique. These special features enable high reliability and relatively high motor efficiency with low blood damage (hemolysis), and tow blood coagulation (thrombus).
Randell, AG, Nguyen, TV, Bhalerao, N, Silverman, SL, Sambrook, PN & Eisman, JA 2000, 'Deterioration in Quality of Life Following Hip Fracture: A Prospective Study', Osteoporosis International, vol. 11, no. 5, pp. 460-466.
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Ritz, CH, Burnett, IS & Lukasiak, J 2000, 'Very low rate speech coding using temporal decomposition and waveform interpolation', 2000 IEEE Workshop on Speech Coding. Proceedings. Meeting the Challenges of the New Millennium (Cat. No.00EX421), pp. 29-31.
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Rosowsky, DV, Stewart, MG & Khor, EH 2000, 'Early-age loading and long-term deflections of reinforced concrete beams', ACI Structural Journal, vol. 97, no. 3, pp. 517-524.
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This paper examines the effects of early-age (construction) loads on the long-term deflections of reinforced concrete (RC) flexural members. Particular consideration is given to simply supported, singly reinforced rectangular beams. The probabilistic analysis of time-dependent deflections takes into account concrete maturation, nonlinear creep and shrinkage behavior, and load process models for both service and construction. While this paper summarizes the time-dependent analysis technique (reported in detail elsewhere), the focus of this paper is on evaluating the effects of early-age loading on the long-term deflection and on practical implications for deflection serviceability design of RC members.
Roughan, R, Veitch, D & Abry, P 2000, 'Real-time estimation of the parameters of long-range dependence', IEEE/ACM Transactions on Networking, vol. 8, no. 4, pp. 467-478.
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Sadiq, W, Marjanovic, O & Orlowska, ME 2000, 'Managing Change and Time in Dynamic Workflow Processes.', Int. J. Cooperative Inf. Syst., vol. 9, no. 1-2, pp. 93-116.
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Sargent, CJ, Bowman, JC & Zhou, JL 2000, 'Levels of antifoulant irgarol 1051 in the Conwy Marina, North Wales', Chemosphere, vol. 41, no. 11, pp. 1755-1760.
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Irgarol 1051 (2-methylthio-4-tert-butylamino-6-cyclopropylamino-s-triazine) is an antifouling agent used in paint formulations that are applied to the hulls of ships. A survey was carried out at Conwy Marina in North Wales to determine the levels of the herbicide over a period of three months. Liquid/liquid extraction was used to concentrate the analyte for quantitative analysis using gas chromatography/mass spectrometry (GC/MS) in the selected ion monitoring (SIM) mode. The concentrations of Irgarol 1051 in Conwy marina ranged from 7 to 543 ng/l, similar to the levels found in many other marinas, estuaries and ports in England, although much lower than those in Côte dAzur, France. The concentrations of Irgarol 1051 were not found to be influenced by salinity, pH or temperature, although there is a strong correlation between the average concentrations of Irgarol 1051 and the density of boating activity. At the levels found in the marina, it is possible that non-target photosynthetic inhibition could occur.
Sheng, D & Smith, DW 2000, 'Numerical modelling of competitive components transport with non-linear adsorption', International Journal for Numerical and Analytical Methods in Geomechanics, vol. 24, no. 1, pp. 47-71.
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Sheng, D, Sloan, SW & Yu, HS 2000, 'Aspects of finite element implementation of critical state models', Computational Mechanics, vol. 26, no. 2, pp. 185-196.
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Sheng-Fu Liang, Su, AWY & Chin-Teng Lin 2000, 'Model-based synthesis of plucked string instruments by using a class of scattering recurrent networks', IEEE Transactions on Neural Networks, vol. 11, no. 1, pp. 171-185.
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Shinq-Jen Wu & Chin-Teng Lin 2000, 'Optimal fuzzy controller design: local concept approach', IEEE Transactions on Fuzzy Systems, vol. 8, no. 2, pp. 171-185.
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Sloan, SW, Sheng, D & Abbo, AJ 2000, 'Accelerated initial stiffness schemes for elastoplasticity', International Journal for Numerical and Analytical Methods in Geomechanics, vol. 24, no. 6, pp. 579-599.
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Stuart, BH & Thomas, PS 2000, 'The characterisation of plastic used in a Gabo sculpture', POLYMER TESTING, vol. 19, no. 8, pp. 953-957.
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Thomas, P & Ray, AS 2000, 'Processing initiated failure of toughened glass panels', Chemistry in Australia, vol. 67, no. 6, pp. 12-14.
Thompson, MD, Gonzalez, N, Nguyen, T, Comings, DE, George, SR & O'Dowd, BF 2000, 'Serotonin transporter gene polymorphisms in alcohol dependence', Alcohol, vol. 22, no. 2, pp. 61-67.
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The serotonin transporter (5-HTT) gene is a candidate gene in alcohol dependence because serotonin reuptake inhibitors (SRIs) can alleviate alcohol withdrawal. Studies of the 5-HTT gene in alcohol dependence have not resulted in a consensus. Recent studies have examined the transcriptionally active promoter polymorphism, a 44-bp deletion resulting in short (S) or long (L) alleles. In this study, 131 alcohol-dependent patients of Northern and Western European descent were genotyped. Seventy of these patients were diagnosed with alcohol dependence without comorbid disorders. Sixty-one patients were diagnosed with alcohol dependence comorbid with Tourette syndrome (alcoholic-TS). We found an excess of the S allele in alcohol-dependent patients (47%) compared with 125 ethnically matched controls (39%). A similar trend was found in 150 ethnically matched TS patients without alcohol dependence comorbidity (51%). However, the statistical significance of this trend in the data was not present after Bonferroni correction. The data presented suggests a trend toward increased frequency of the S promoter allele in alcohol-dependent, alcoholic-TS and TS patients. (C) 2000 Elsevier Science Inc.
Tipper, JL, Ingham, E, Hailey, JL, Besong, AA, Fisher, J, Wroblewski, BM & Stone, MH 2000, 'Quantitative analysis of polyethylene wear debris, wear rate and head damage in retrieved Charnley hip prostheses', Journal of Materials Science: Materials in Medicine, vol. 11, no. 2, pp. 117-124.
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Submicrometer- and micrometer-sized ultra-high molecular weight polyethylene (UHMWPE) wear particles have been associated with osteolysis and failure of total artificial joints. Previous studies have isolated predominantly submicrometer-sized particles at the expense of larger particles ( > 10 μm). This study aimed to isolate and characterize quantitatively all sizes of UHMWPE wear particles generated in 18 Charnley hip prostheses. In addition, to analyze the wear debris with respect to the total volumetric wear of the cup and damage to the femoral head. Particle size distributions ranged from 0.1 to - > 1000 μm. A significant proportion (3-82%) of the mass of the wear debris isolated was > 10 μm. The mode of the frequency distribution of the particles was in the range 0.1-0.5 μm for all patients. However, analysis of the mass of wear debris as a function of its size allowed differentiation of the wear debris from different patients. Femoral head damage was associated with high volumetric wear and increased numbers of biologically active submicrometer-sized particles. (C) 2000 Kluwer Academic Publishers.
Tran, T 2000, 'Risk factors for postcesarean surgical site infection', Obstetrics & Gynecology, vol. 95, no. 3, pp. 367-371.
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Trinh, H & Ha, Q 2000, 'Design of linear functional observers for linear systems with unknown inputs', International Journal of Systems Science, vol. 31, no. 6, pp. 741-749.
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This paper presents a reduced-order linear functional state observer for linear systems with unknown inputs. A simple observer construction procedure is provided. A numerical example is given to illustrate the properties of the observer. The example deals with a linear system comprising of 20 states, 2 inputs, 10 outputs and 5 unknown inputs for which a fourth-order observer is designed to estimate two linear functions of the states.
Tuan, HD & Hosoe, S 2000, 'Multivariable circle criteria for multiparameter singularly perturbed systems', IEEE Transactions on Automatic Control, vol. 45, no. 4, pp. 720-725.
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Tuan, HD, Apkarian, P, Hosoe, S & Tuy, H 2000, 'D.C. optimization approach to robust control: Feasibility problems', International Journal of Control, vol. 73, no. 2, pp. 89-104.
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Tuan, HD, Hosoe, S & Tuy, H 2000, 'DC optimization approach to robust controls: the optimal scaling value problem', IEEE Transactions on Automatic Control, vol. 45, no. 10, pp. 1903-1909.
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Turnbull, GA, McGloin, D, Lindsay, ID, Ebrahimzadeh, M & Dunn, MH 2000, 'Extended mode-hop-free tuning by use of a dual-cavity, pump-enhanced optical parametric oscillator', Optics Letters, vol. 25, no. 5, pp. 341-341.
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Turnbull, GA, McGloin, D, Lindsay, ID, Ebrahimzadeh, M & Dunn, MH 2000, 'Extended mode-hop-free tuning using a dual-cavity, pump-enhanced optical parametric oscillator', Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088), pp. 521-522.
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This paper reports extended spectral tuning in PPLN-based PE-SROs. The devices described exhibit coarse wavelength tuning from 2.7 to 5.3 μm and smooth single-frequency scanning ranges of over 10 GHz. The latter is accomplished by a novel dual-cavity configuration in which mode-hopping is suppressed.
Turner, JC & Shannon, AG 2000, 'On Fibonacci sequences, geometry, and the m-square equation', FIBONACCI QUARTERLY, vol. 38, no. 2, pp. 98-103.
Val, DV, Stewart, MG & Melchers, RE 2000, 'Life-Cycle Performance of RC Bridges: Probabilistic Approach', Computer-Aided Civil and Infrastructure Engineering, vol. 15, no. 1, pp. 14-25.
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This article addresses the problem of reliability assessment of reinforced concrete (RC) bridges during their service life. First, a probabilistic model for assessment of time-dependent reliability of RC bridges is presented, with particular emphasis placed on deterioration of bridges due to corrosion of reinforcing steel. The model takes into account uncertainties associated with materials properties, bridge dimensions, loads, and corrosion initiation and propagation. Tune-dependent reliabilities are considered for ultimate and serviceability limit states. Examples illustrate the application of the model. Second, updating of predictive probabilistic models using site-specific data is considered. Bayesian statistical theory that provides a mathematical basis for such updating is outlined briefly, and its implementationfor the updating of information about bridge properties using inspection data is described in more detail. An example illustrates the effect of this updating on bridge reliability. © 2000 Computer-Aided Civil and Infrastructure Engineering. Published by Blackwell Publishers,.
Veitch, D, Taqqu, MS & Abry, P 2000, 'Meaningful MRA initialization for discrete time series', Signal Processing, vol. 80, no. 9, pp. 1971-1983.
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Vigneswaran, S, Kwon, D, Ngo, H & Hu, J 2000, 'Improvement of microfiltration perfromance in water treatment: Is critical flux, a viable solution?', Water Science and Technology, vol. Volume 41, no. 0, pp. 309-310.
Vigneswaran, S, Ngo, HH, Hashimoto, K, Hasegawa, T & Watanabe, Y 2000, 'High rate floating medium flocculation-filtration with in-line polysilicato-iron (PSI) addition', ENVIRONMENTAL TECHNOLOGY, vol. 21, no. 3, pp. 317-325.
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The performance of a high rate floating medium flocculation-filtration system with an in-line addition of a silica-polymer compound, namely polysilicato-iron (PSI) has been investigated for water treatment. This study is intended to investigate the applicability of PSI as a sole flocculant or as a combined flocculant with an organic polymer in the downflow floating medium filter. The filter system was operated at a high loading rate of up to 60 m3 m-2 h-1. Filter column experiments were conducted at different PSI doses, filtration rates, filter depths and buoyant medium types and sizes. Results showed the filter system was able to yield uniform and filterable flocs (15 - 20 µm), even at a very high filtration rate of 60 m-3 h-1, through out the filter run time of 4 hours. Better filter performance was obtained when: (i) polystyrene beads of 1.9 mm diameter or polypropylene beads of 3.8 mm diameter; (ii) an in-line single dosage of 2.5 mg l-1 PSI; (iii) in-line combined dosages of 1.5 mg l-1 PSI and 0.4-0.6 mg l-1 organic polymers (cationic polyacrylamides, cationic polystyrene or Pollyallylamine hydrochloride) were used. When PSI was introduced as a sole flocculant, more than 90% turbidity was removed from a 54 NTU artificial kaolin clay suspension at a filtration rate of 30 m-3 m-2h-1 with very low headloss development. Greater removals were achieved when SIF was used in combination with a polymer (e.g.greater than 95% turbidity removal). Frequent (once in every 90 minutes) but short duration backwash (less than 60 s) by air and water enables the system to maintain a superior effluent quality (e.g. turbidity less than 1 NTU) during the filter run. Backwash water requirement was very low (approximately 1%-2% of filtered water production). A lower amount of sludge was produced from the filter in case of combined PSI and organic polymer coagulant addition.
Vu, KAT & Stewart, MG 2000, 'Structural reliability of concrete bridges including improved chloride-induced corrosion models', Structural Safety, vol. 22, no. 4, pp. 313-333.
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A structural deterioration reliability (probabilistic) model has been used herein to calculate probabilities of structural failure. New reinforced concrete corrosion initiation, corrosion rate and time-variant load models are proposed. Three durability design specifications are considered in a lifetime reliability analysis of a RC slab bridge. Time-variant increases in loads are considered also. It was found that the application of de-icing salts causes significant long-term deterioration and reduction in structural safety for poor durability design specifications. A reduced cover or increased water-cement ratio increases failure probabilities. When compared to the case of 'no deterioration', it was observed also that the probability of failure only marginally increased for good durability design specifications. The approaches described herein are relevant to other physical infrastructure also. © 2000 Elsevier Science Ltd. All rights reserved.
Waldron, KJ & Hubert, CJ 2000, 'Control of contact forces in wheeled and legged off-road vehicles', EXPERIMENTAL ROBOTICS VI, vol. 250, pp. 205-214.
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The use of variable configuration vehicles creates the possibility of direct control of the contact forces between the foot or wheel of a vehicle and the ground. That control is an important element of the coordination of practical walking machines. Cont
Wang, J & Yan, H 2000, 'A hybrid method for unconstrained handwritten numeral recognition by combining structural and neural “gas” classifiers', Pattern Recognition Letters, vol. 21, no. 6-7, pp. 625-635.
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Abstract: This paper presents a hybrid method for handwritten numeral recognition that combines two compensatory recognition algorithms by analysing their performance for several aspects. The skeleton-based structural recognition algorithm employed in this method is robust under distortion but sensitive to noise and flaws. On the other hand, the neural network classifier, which uses scaled binary images as features and the neural "gas" model for classification, is relatively immune to noise and flaws but sensitive to distortion. The different performances of the two algorithms for broken, connected or slanted numerals, and the measurement-level decision provided by the neural network are detected and combined with different strategies to develop matching rules for each recognition method. Five combination methods based on performance analysis are developed to meet different requirements. As the two algorithms have fairly compensatory properties, the proposed method improves the recognition rate and reliability by exploiting the advantages and avoiding the weaknesses of each classifier. The experimental results from a large set of data show the efficiency and robustness of the proposed method.
Watterson, PA 2000, 'Energy calculation of a permanent magnet system by surface and flux integrals (the flux-mmf method)', IEEE Transactions on Magnetics, vol. 36, no. 2, pp. 470-475.
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Watterson, PA, Woodard, JC, Ramsden, VS & Reizes, JA 2000, 'VentrAssist hydrodynamically suspended, open, centrifugal blood pump', ARTIFICIAL ORGANS, vol. 24, no. 6, pp. 475-477.
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Wei, D, Han, J, Xie, J, Fu, C, Wang, L & He, Y 2000, 'Experimental study on inner crack healing in steel during hot plastic deforming', Jinshu Xuebao/Acta Metallurgica Sinica, vol. 36, no. 6, pp. 622-625.
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The test that tries to heal inner crack in 20MnMo steel and 20 steel was carried out by using HIGH-MULTI 5000 hot-press equipment. Under the hot plastic deforming, the inner crack can be healed completely and ferrite has been discovered in the healing area. Contrasting to the resuts of high temperature healing treatment without plastic deforming, the healing process with hot plastic deforming is developed rapidly. Structural inhomogeneity between healing area and matrix can not be improved.
Wei, D, Han, J, Xie, J, Fu, C, Wang, L & He, Y 2000, 'Steel crack healing at elevated temperature in vacuum', Jinshu Xuebao/Acta Metallurgica Sinica, vol. 36, no. 7, pp. 713-717.
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The method of dissected sample heat treatment in vacuum was tried to study inner crack healing in steel at elevated temperature. The dissected samples with prepared inner crack were encapsulated in quartz glass tubes of 133×10-4 Pa, then were heat treated at elevated temperature. The cracks on section planes of 20MnMo, 20 and 45 steels were healed, and the ferrite appears in healing area. The results are similar as that of intact sample heat treatment, which indicates that the dissected sample heat treatment method is feasible for studying inner crack healing in steel. It was deduced that surface cracks of steel could be healed in vacuum environment at elevated temperature if it was not covered by oxide. The welding at elevated temperature is more effective for crack healing than other mechanisms during higher temperature.
Willey, K 2000, 'Selecting a pedestal for tracking LEO satellites at Ka band', MICROWAVE JOURNAL, vol. 43, no. 4, pp. 118-+.
Willey, K 2000, 'Selecting a pedestal for tracking LEO satellites at Ka band', Microwave Journal, vol. 43, no. 4.
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The issues involved in selecting a pedestal for tracking low Earth orbit (LEO) satellites are discussed. An X-Y pedestal allows zenith pass tracking even with relatively low speed motors. Additional advantages of an X-Y design include identical X and Y axes, which keep spare part requirements to a minimum, and the ability to use high quality, off-the-shelf components, allowing significant savings. In addition, the use of brushless DC motors eliminates the need for expensive rotary joints and slip rings. The X-Y pedestal provides improved tracking accuracy for overhead passes compared to three-axis pedestals, and offers an improved mean time between failures (MTBF) compared to other pedestals.
Wittwer, DC & Ziolkowski, RW 2000, 'Maxwellian material-based absorbing boundary conditions for lossy media in 3-D', IEEE Transactions on Antennas and Propagation, vol. 48, no. 2, pp. 200-213.
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Wittwer, DC & Ziolkowski, RW 2000, 'Two timederivative lorentz material (2TDLM) formulation of a maxwellian absorbing layer matched to a lossy medium', IEEE Transactions on Antennas and Propagation, vol. 48, no. 2, p. 192199.
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A two timederivative Lorentz material (2TDLM) is introduced to define polarization and magnetization fields that lead to an absorbing layer that can be matched to a lossy dielectric medium. The 2TDLM is a generalization of the successful uniaxial polarization and magnetization timederivative Lorentz material (TDLM) which has been introduced as an absorbing boundary condition for simulation regions dealing with lossless materials. Expressions are derived to describe the propagation of an arbitrary plane wave in this 2TDLM Maxwellian absorbing material. They are used to study the scattering from a semiinfinite 2TDLM halfspace of an arbitrary plane wave incident upon it from a lossy isotropic dielectric medium. Matching conditions are derived which produce reflectionless transmission through such an interface for any angle of incidence and frequency. Numerical tests are given which demonstrate the effectiveness of the resulting 2TDLM absorbing layer. © 2000 IEEE.
Wittwer, DC & Ziolkowski, RW 2000, 'Two time-derivative Lorentz material (2TDLM) formulation of a Maxwellian absorbing layer matched to a lossy medium', IEEE Transactions on Antennas and Propagation, vol. 48, no. 2, pp. 192-199.
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Wu, Z & Ziolkowski, RW 2000, 'Electromagnetic Effects Associated with a Cavity-Backed Aperture Loaded with Nonlinear Elements', Progress In Electromagnetics Research, vol. 28, pp. 1-16.
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Wu, Z & Ziolkowski, RW 2000, 'Electromagnetic Effects Associated With a Cavity-Backed Aperture Loaded With Nonlinear Elements - Abstract', Journal of Electromagnetic Waves and Applications, vol. 14, no. 5, pp. 613-614.
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The electromagnetic properties of cavity-backed apertures loaded with nonlinearly-loaded, electrically small dipole antennas are studied with an extended FDTD simulator. A nonlinearity in the antenna load is introduced by connecting a nonlinear circuit to the dipole antenna. The simplest nonlinear circuit, a nonlinear diode in series with a resistor, is treated in detail to illustrate the effects of a device that will generate well-defined harmonics to any driving frequency. Computational results are generated for both TM and TE cases and for broadband and narrowband excitations. The extended FDTD simulations show that various EMC and RCS effects associated with the presence of a nonlinearly-loaded electrically small dipole antenna are closely connected to the resonant features associated with the cavity-backed aperture. It is illustrated that if the antenna position is properly correlated to peaks of the modal distribution supported by the open cavity, then the fields associated with frequencies generated by the nonlinear load can be coupled significantly to other elements or structures within its interior. It is further demonstrated that the fields generated within the interior of the cavity can be resonantly coupled to its exterior at those frequencies; hence, the scattered fields in the far field will contain information about the characteristics of the interior of the cavity and its nonlinear loading.
Yi-Jen Wang & Chin-Teng Lin 2000, 'Recurrent learning algorithms for designing optimal controllers of continuous systems', IEEE Transactions on Systems, Man, and Cybernetics - Part A: Systems and Humans, vol. 30, no. 5, pp. 580-588.
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Ying, MS 2000, 'Automata theory based on quantum logic II', INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, vol. 39, no. 11, pp. 2545-2557.
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We establish the pumping lemma in automata theory based on quantum logic under certain conditions on implication, and discuss the recognizability by the product and union of orthomodular lattice-valued (quantum) automata. In particular, we show that the
Ying, MS 2000, 'Automata theory based on quantum logic. (I)', INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, vol. 39, no. 4, pp. 985-995.
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We present a basic Framework of automats theory based on quantum logic. In particular, we introduce the orthomodular lattice-valued (quantum) predicate of recognizability and establish some of its fundamental properties.
Ying, MS 2000, 'Declarative semantics of programming in residuated lattice-valued logic', SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, vol. 43, no. 5, pp. 481-494.
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We give two generalizations of Tarski's fixpoint theorem in the setting of residuated lattices and use them to establish van Emdem-Kowalski's least fixpoint semantics for residuated lattice-valued logic programs.
Ying, MS 2000, 'Weak confluence and tau-inertness', THEORETICAL COMPUTER SCIENCE, vol. 238, no. 1-2, pp. 465-475.
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We introduce a new definition of weak confluences and show that they are equivalent to tau-inertness without any appealing to tau-well-foundedness. (C) 2000 Elsevier Science B.V. All rights reserved.
Yu, JX, Sakata, T & Tan, K 2000, 'Statistical estimation of access frequencies in data broadcasting environments', Wireless Networks, vol. 6, no. 2, pp. 89-98.
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Zhang, J, Arnold, JF & Frater, MR 2000, 'A cell-loss concealment technique for MPEG-2 coded video', IEEE Transactions on Circuits and Systems for Video Technology, vol. 10, no. 4, pp. 659-665.
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Audio-visual and other multimedia services are seen as important sources of traffic for future telecommunication networks, including wireless networks. A major drawback with some wireless networks is that they introduce a significant number of transmissi
Zhang, XP, Wang, CH, Li, JC, Mai, YW & Ye, L 2000, 'A Combined Model of Short Crack Closure Accounting for Both Plasticity and Roughness Induced Crack Closures', Key Engineering Materials, vol. 183-187, pp. 217-222.
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Zhang, XP, Wang, CH, Li, JC, Mai, YW & Ye, L 2000, 'Combined model of short crack closure accounting for both plasticity and roughness induced crack closures', Key Engineering Materials, vol. 183.
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A new model combining both plasticity-induced and surface roughness-induced crack closures is proposed to describe short fatigue crack growth. The numerical results obtained using this model agree well with the analytical predictions of Budiansky-Hutchinson and are reasonably close to the experimental data.
Zhou, JL & Liu, YP 2000, 'Kinetics and equilibria of the interactions between diethylhexyl phthalate and sediment particles in simulated estuarine systems', Marine Chemistry, vol. 71, no. 1-2, pp. 165-176.
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Zhou, JL, Hong, H, Zhang, Z, Maskaoui, K & Chen, W 2000, 'Multi-phase distribution of organic micropollutants in Xiamen Harbour, China', Water Research, vol. 34, no. 7, pp. 2132-2150.
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Xiamen Harbour, in the Xiamen Special Economic Zone of the Peoples Republic of China, was studied for its water and sediment quality, by determining the levels of 16 polycyclic aromatic hydrocarbons (PAHs), 12 polychlorinated biphenyls (PCBs) and 18 organochlorine insecticides in water, suspended particulate matter (SPM), pore water and sediment samples from nine stations in the Harbour. Total PAH concentrations varied from 106 to 945 ng/l in water, <1 to 3548 ng/l in pore water, and 247 to 480 ng/g dry weight in surficial sediments. Total PCB levels varied from 0.1 to 1.7 ng/l in water, 2.7 to 34.8 ng/l in pore water, and <0.01 to 0.32 ng/g dry weight in sediments. The levels of all insecticides were in the range of 6.619.6 ng/l (water), 11.878.5 ng/l (pore water), and <0.010.58 ng/g dry weight (sediment). The levels of total hexachlorocyclohexane (HCHs) in sediments varied from <0.01 to 0.14 ng/g dry weight, and those of total DDTs were in the range of <0.010.06 ng/g dry weight. The micropollutants were present in higher levels in pore water than in surface water, due possibly to higher concentrations of dissolved organic carbon or colloids with which the hydrophobic pollutants are strongly associated. Such a concentration gradient implies a potential flux of pollutants from sediment pore water to overlying water. The levels of pollutants in sediments are one to several orders of magnitude lower than those found in 1993, suggesting their decreased inputs in recent years in the form of fresh and less contaminated material and possible degradation over a period of time. Further work is needed to quantify the levels of these contaminants in suspended particulate matter, which are currently below the limits of detection.
ZHU, XQ & LAW, SS 2000, 'IDENTIFICATION OF VEHICLE AXLE LOADS FROM BRIDGE DYNAMIC RESPONSES', Journal of Sound and Vibration, vol. 236, no. 4, pp. 705-724.
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Apkarian, P, Tuan, HD & Bernussou, J 1970, 'Analysis, eigenstructure assignment and H2 multi-channel synthesis with enhanced LMI characterizations', Proceedings of the IEEE Conference on Decision and Control, 39th IEEE Conference on Decision and Control, IEEE, SYDNEY, AUSTRALIA, pp. 1489-1494.
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This paper describes a new framework for the analysis and synthesis of control systems, which constitutes a genuine continuous-time extension of results that are only available in discrete time. In contrast to earlier results the proposed methods involve a specific transformation on the Lyapunov variables and a reciprocal variant of the Projection Lemma, in addition to the classical linearizing transformations on the controller data. For a wide range of problems including robust analysis and synthesis, multi-channel H2 state- and output-feedback syntheses, the approach leads to potentially less conservative LMI characterizations. This comes from the fact that the technical restriction of using a single Lyapunov function is to some extent ruled out in this new approach. Moreover, the approach offers new potentials for problems that cannot be handled using earlier techniques. As an instance, the eigenstructure assignment problem blended with Lyapunov-type constraints is given a simple and tractable formulation.
Aziz, NI, Indraratna, B & Dey, A 1970, 'The influence of surface geometry on the load transfer mechanisms of grouted bolts - A laboratory study', Australasian Institute of Mining and Metallurgy Publication Series, pp. 917-931.
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The surface geometry of a rock bolt plays a very important role in the rock/resin/bolt load transfer mechanism. Very little work has so far been reported on the influence of the bolt surface geometry on the bolt/resin interface failure mechanism. This paper examines the behaviour of bolt surface roughness under constant normal stiffness condition in the laboratory. To study the shear behaviour of the bolt/resin interface a series of shear tests with an initial normal stress between 0.1 to 7.5 MPa has been conducted on the flattened bolt surface of two most popular bolt types currently being used in Australia. Bolts with deeper ribs offered better shear resistance at low initial normal stress conditions whereas bolts with shallow and closer ribs offered better shear resistance at high normal stress conditions. The maximum dilation occurred at a shear displacement of 60 per cent of the rib spacing irrespective of the bolt type and depth of the rib.
Bangun, RA & Dutkiewicz, E 1970, 'Modelling multi-player games traffic', Proceedings International Conference on Information Technology: Coding and Computing (Cat. No.PR00540), International Conference on Information Technology: Coding and Computing. ITCC 2000, IEEE Comput. Soc, pp. 228-233.
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The growing popularity of delay-sensitive multi-player games over the Internet is creating a need for proper characterisation of such traffic. We are currently developing source models for game traffic, on a per-player basis, with the intended use being to scale the models to simulate scenarios involving large numbers of players, which will enable us to observe the effects of game traffic on the network. We outline the procedure used, and we show that for certain cases, relatively simple source models are able to provide sufficiently accurate results (in terms of mean delay and mean buffer occupancy).
Beydoun, G & Hoffmann, A 1970, 'Monitoring knowledge acquisition instead of evaluating knowledge bases', KNOWLEDGE ENGINEERING AND KNOWLEDGE MANAGEMENT, PROCEEDINGS, 12th International Conference on Knowledge Engineering and Knowledge Management, SPRINGER-VERLAG BERLIN, JUAN LES PINS, FRANCE, pp. 387-402.
Bidegaray, B, Bourgeade, A, Reignier, D & Ziolkowski, RW 1970, 'Multi-level Maxwell-Bloch simulations.', FIFTH INTERNATIONAL CONFERENCE ON MATHEMATICAL AND NUMERICAL ASPECTS OF WAVE PROPAGATION, 5th International Conference on Mathematical and Numerical Aspects of Wave Propagation, SIAM, SANTIAGO DE COMPOSTELA, SPAIN, pp. 221-225.
Bidkar, A, Vigneswaran, S, Milne-Home, WA, Ngo, H & Moon, H 1970, 'Adsorption of Metsulfuron-Methyl on Granular Activated Carbon', Proceedings of the 4th International Symposium on Environmental Geotechnology and Global Sustainable Development, CEEST, Boston (Danvers), Massachusetts, USA, pp. 1079-1086.
Bone, DJ & Popescu, DC 1970, 'Multiresolution scanning imager with spatially uniform noise response based on a new class of Hadamard masks', SPIE Proceedings, Electronic Imaging, SPIE, SAN JOSE, CA, pp. 437-450.
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Castel, A, Francois, R & Arliguie, G 1970, 'Factors other than chloride level influencing corrosion rate of reinforcement', American Concrete Institute, ACI Special Publication, pp. 629-644.
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To evaluate the degree of corrosion, reinforcements of a fourteen-year-old concrete member were completely bared. The 3-meter long beams were stored in 3-point flexion in an aggressive environment made by sequences of drying and wetting by a salt fog (35g/l). The total chloride content was also measured at the level of all reinforcements. Because of the small concrete cover (10 mm for the stirrups and 16 mm for the longitudinal reinforcement), the chloride content appears to be significantly greater than the threshold usually used to evaluate the initiation of corrosion. Carbonation front was also measured and was only about 4 mm. Nevertheless, the degree of corrosion (mass loss calculation) shows no correlation with chloride content, as some large parts of reinforcement are not affected by corrosion. As a result, corrosion damage seems to be linked to a degradation of the steel-concrete interface. For tensile reinforcement, it corresponds to a mechanical degradation whereas for compression reinforcement it corresponds to the bleeding. This observation leads us to question ourselves about the relevance of a single value for the corrosion threshold. The nature of the interface between the steel and the concrete must be considered.
Chang, CF, Ghose, A, Lipman, J & Harvey, P 1970, 'Gongeroos’99', ROBOCUP-99: ROBOT SOCCER WORLD CUP III, 3rd Robot World Cup Soccer Games and Conference, Springer Berlin Heidelberg, STOCKHOLM, SWEDEN, pp. 572-575.
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Chen, C & Zhou, W 1970, 'AN ARCHITECTURE FOR RESOLVING NETWORK PARTITIONING', 15th International Conference on Computers and Their Applications 2000, CATA 2000, pp. 84-87.
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Network partitioning is harder to deal with than many other failure problems in a distributed environment This paper presents a solution of using reactive system architecture to solve partitioning problem with the Primary/Non-Primary replication control protocol. The reactive system concepts are an attractive paradigm in fault-tolerant computing because it separates policies from mechanisms. In the paper, DMM, sensor and actuator modules are implemented to achieve the mechanisms for failure detecting, notifying and resolving.
Chilakapati, N, Ramsden, VS, Ramaswamy, V & Zhu, JG 1970, 'Comparison of closed-loop speed control schemes for a doubly fed twin stator induction motor drive', IPEMC 2000: THIRD INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE, VOLS 1-3, PROCEEDINGS, International Academic Publishers World Publishing Corporation, China, pp. 786-791.
Chilakapati, N, Ramsden, VS, Ramaswamy, V, Zhu, JG & Jayatileke, S 1970, 'Current space vector control of doubly fed twin stator induction machine drive', 2000 INTERNATIONAL CONFERENCE ON POWER SYSTEM TECHNOLOGY, VOLS I-III, PROCEEDINGS, IEEE, WA, Australia, pp. 73-78.
Chin-Teng Lin, I-Fang Chung, Shaw-An Liann & Feng-Yu Su 1970, 'Multipurpose virtual-reality-based motion simulator', Proceedings of the 3rd World Congress on Intelligent Control and Automation (Cat. No.00EX393), WCICA 2000. Proceedings of the 3rd World Congress on Intelligent Control and Automation, IEEE, HEFEI, PEOPLES R CHINA, pp. 2699-2704.
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Crews, KI 1970, 'Development of limit states design methods for stress-laminated timber cellular bridge decks', World Conference on Timber Engineering 2000, World Conference on Timber Engineering, University of British Columbia, Vancouver, Canada, pp. 0-0.
Cucchiara, R, Piccardi, M & Prati, A 1970, 'Focus based Feature Extraction for Pallets Recognition', Procedings of the British Machine Vision Conference 2000, British Machine Vision Conference 2000, British Machine Vision Association.
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Damian, DE, Shaw, ML, Gaines, BR & Zowghi, D 1970, 'A Multidisciplinary approach to the study of distributed requirements negotiation', Fifth Australian Workshop on Requirements Engineering (AWRE2000), Australian Workshop on Requirements Engineering, Faculty of Information Technology, Brisbane, Australia, pp. 91-100.
Darwood, P, Oppermann, I, Jakas, S & Linton, W 1970, 'Mobile network traffic forecasting', Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152), Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference, IEEE, BOSTON, MA, pp. 2932-2936.
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Donaton, RA, Iacopi, F, Baklanov, MR, Shamiryan, D, Coenegrachts, B, Struyf, H, Lepage, M, Meuris, M, Van Hove, M, Gray, WD, Meynen, H, De Roest, D, Vanhaelemeersch, S, Maex, K, IEEE & IEEE 1970, 'Physical and electrical characterization of silsesquioxane-based ultra-low k dielectric', PROCEEDINGS OF THE IEEE 2000 INTERNATIONAL INTERCONNECT TECHNOLOGY CONFERENCE, 3rd Annual International Interconnect Technology Conference, IEEE, SAN FRANCISCO, CA, pp. 93-95.
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Drake, BJ & Beydoun, G 1970, 'Predicate logic-based incremental KA', Proceedings of the 6th Pacific Knowledge Acquisition Workshop (PKAW 2000), 6th Pacific Knowledge Acquisition Workshop, Sydney, Australia, pp. 71-88.
Drummond, PD, Kheruntsyan, K, Bremner, M & Myers, C 1970, 'Quantum and classical solitons with a two-component Bose gas', IQEC, International Quantum Electronics Conference Proceedings.
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The superchemistry dynamics in a magnetic trap were dynamics, in which atoms coherently convert to molecules with a Bose-enhanced rate given by nonlinear equations that are similar to the equations of nonlinear optics. The superchemistry limit typically involves magnetic traps that are not spherically symmetric. The first fully three-dimensional lattice calculations of the coherent atom-molecule oscillations in this case is shown that different trapping frequencies do not destroy the coherent oscillations.
Eades, P & Lin Huang, M 1970, 'Navigating Clustered Graphs Using Force-Directed Methods', Journal of Graph Algorithms and Applications, Journal of Graph Algorithms and Applications, pp. 157-181.
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Graphs which arise in Information Visualization applications are typically very large: thousands, or perhaps millions of nodes. Current graph drawing methods successfully deal with (at best) a few hundred nodes. This paper describes a strategy for the visualization and navigation of graphs. The strategy has three elements: 1. A layered architecture, called CGA, for handling clustered graphs: these are graphs with a hierarchical node clustering superimposed. 2. An online force-directed graph drawing method. 3. Animation methods. Using this strategy, a user may view an abridgment of a graph, that is, a small part of the graph that is currently of interest. By changing the abridgment, the user may travel through the graph. The changes use animation to smoothly transform one view to the next. The strategy has been implemented in a prototype system called DA-TU.
Esselle, K & Foroughipour, M 1970, 'Application of enhanced FD-TD equations to analyse coupling between inclined microstrip patch antennas', IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.00CH37118), IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium, IEEE, pp. 1982-1985.
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Mutual coupling between pairs of rectangular microstrip patch antenna elements that are inclined to the FD-TD grid by 45° is analysed using enhanced FD-TD equations for diagonal metal edges. These enhanced equations, derived by considering the field singularity at a sharp metal edge, model the coupling effect between two patch antennas very efficiently and accurately. Mutual coupling is analysed using two established techniques as well, namely the staircase and the split-cell, for comparison with the enhanced-equation technique. It is found that the enhanced-equation technique gives extremely accurate results consistently, without any noticeable computing overhead. For example, the accuracy of the first peak of the frequency response in one case is 0.7% from the enhanced-equations technique whereas the same from the staircase and split-cell techniques is 9.8% and 4.4%, respectively. The enhanced equations were found to be very stable, and were time-stepped at the maximum limit in all simulations without any problems.
Esselle, KP & Foroughipour, M 1970, 'Application of enhanced FD-TD equations to analyse coupling between inclined microstrip patch antennas', IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, VOLS 1-4, 2000 IEEE Antennas-and-Propagation-Society International Symposium, IEEE, SALT LAKE CITY, UT, pp. 1980-1985.
Foroughipour, SM & Esselle, KP 1970, 'Enhanced FD-TD equations for diagonal metal edges and their microwave applications', Asia-Pacific Microwave Conference Proceedings, APMC, pp. 10-11.
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The standard FD-TD method requires a very fine grid to model singular fields in the vicinity of sharp metal edges. This is a problem for simulating microwave structures composed of thin metal sheets, such as planar transmission lines and patch antennas. We have derived improved (enhanced) FD-TD equations for diagonal metal edges by considering field singularity. With these equations, various microwave structures can be analyzed accurately using a much coarser grid. In this paper, we demonstrate the application of enhanced FD-TD equations in (1) modeling wave propagation in diagonal microstrip lines, (2) simulating resonance in microstrip patch antennas. The accuracy of numerical results was improved by a factor of between 4 to 10, without additional computational overhead (time or memory).
Franklin, D, Jiangtao Xi & Chicharo, J 1970, 'An improved channel model for ADSL and VDSL systems', WCC 2000 - ICCT 2000. 2000 International Conference on Communication Technology Proceedings (Cat. No.00EX420), 16th International Conference on Communication Technology (ICCT'00), IEEE, Beijing, China, pp. 30-33.
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This paper examines existing channel models used with xDSL systems and identifies a key shortcoming - namely, the implicit assumption that all impulse noise originates at the transmitter. Based on extensive data collected from the local loop, a new model is proposed which addresses this problem by combining a digital filter model of the transmission line with a distributed noise source. This better reflects the nature of a real telephone line, and thus provides a more solid basis for simulation and optimisation of xDSL systems
Ge, Y & Esselle, KP 1970, 'Microwave dielectric-resonator antenna analysis and design', Asia-Pacific Microwave Conference Proceedings, APMC, p. 36.
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Open dielectric-resonators (DR) offer attractive features as antenna elements. In this paper, two numerical methods developed for the analysis and design of microwave dielectric-resonator antennas (DRAs) are discussed. They are the Finite-Difference Time-Domain (FD-TD) method and the Method of Moments (MoM). Theoretical E- and H-plane patterns obtained from these methods for a low-profile rectangular DRA compare well with the measured results.
Goyal, M & Parameswaran, N 1970, 'A Coherent Teamwork Model in a Dynamic Environment.', FLAIRS Conference, pp. 128-132.
Goyal, M & Parameswaran, N 1970, 'A Complete Teamwork Model in a Dynamic Environment', MICAI 2000: ADVANCES IN ARTIFICIAL INTELLIGENCE, PROCEEDINGS, Mexican International Conference on Artificial Intelligence (MICAI 2000), Springer Berlin Heidelberg, ACAPULCO, MEXICO, pp. 718-728.
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Goyal, ML & Parameswaran, N 1970, 'The Attitudes in Team Based Problem Solving', International ICSC Symposium on Muti-agents and Mobile Agents in Virtual Organizations and E-Commerce (MAMA'2000), Wollongong.
Gu, L, Bone, D & Reynolds, G 1970, 'Replay Detection in Sports Video Sequences', Springer Vienna, pp. 3-12.
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Guo, YG, Zhou, HQ, Feng, HQ & Wang, HL 1970, 'Parallel algorithm for calculation of cell dipoles in ECG simulation', IEEE-EMBS ASIA PACIFIC CONFERENCE ON BIOMEDICAL ENGINEERING - PROCEEDINGS, PTS 1 & 2, IEEE-EMBS Asia-Pacific Conference on Biomedical Engineering, WORLD PUBLISHING CORPORATION, HANGZHOU, PEOPLES R CHINA, pp. 121-122.
Ha, QP, Bonchis, A, Rye, DC & Durrant-Whyte, HF 1970, 'Variable structure systems approach to friction estimation and compensation', Proceedings - IEEE International Conference on Robotics and Automation, pp. 3543-3548.
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Compensating for friction is concerned in this paper using the variable structure systems approach. First, variable structure-based observers are developed for friction estimation in mechanical systems with or without information of velocity. The estimates are then used for a model-based feedforward compensation for friction. For a non model based approach, a robust sliding mode controller can also be used to cancel the influence of friction. Sigmoidal functions are use in lieu of signum functions to reduce chattering. Simulation results verify the validity of the proposed technique to compensate for friction of both static and dynamic models.
Ha, QP, Rye, DC, Durrant-Whyte, HF & Trinh, H 1970, 'Fuzzy global control for complex systems', IEEE International Conference on Fuzzy Systems, 9th IEEE International Conference on Fuzzy Systems (FUZZy-IEEE 2000), IEEE, SAN ANTONIO, TX, pp. 459-464.
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In this paper, a fuzzy global controller based on sliding mode control is proposed for a reasonable amalgamation of local controllers to meet various control requirements for complex systems operating in highly uncertain environments. Also, a fuzzy logic approach is developed for the smooth allocation of several algorithms of a controller to gain the advantages, and at the same time to alleviate the disadvantages of each control algorithm. Illustrative examples are provided.
Hao, H & Wu, CQ 1970, 'Numerical modeling of underground explosion-induced stress wave propagation in rock mass', WAVE 2000: WAVE PROPAGATION, MOVING LOAD, VIBRATION REDUCTION, WAVE 2000 International Workshop, A A BALKEMA PUBLISHERS, BOCHUM, GERMANY, pp. 369-378.
Hawryszkiewycz, IT 1970, 'Knowledge networks in Administrative Systems', Working Conference on Advances in Electronic Government, IFID Trough Seminario de Informatica y Dorecujo, Zaragoza, pp. 59-76.
Hill, MJ, Papapolymerou, J & Ziolkowski, RW 1970, 'A High Performance K-Band Diplexer using High-Q Micromachined Cavities', 30th European Microwave Conference, 2000, 30th European Microwave Conference, 2000, IEEE.
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Microwave diplexers are often used on transmit / receive systems to isolate a power transmit stage from a sensitive receive stage sharing a common antenna. With the ever-increasing need for efficient bandwidth usage, diplexers exhibiting close channel spacing, low insertion loss and small channel bandwidths are increasingly necessary. Utilizing two high Q cavity resonators, a Duroid-based high performance diplexer has been designed, fabricated and measured. This diplexer shows transmit / receive bandwidths of 2.39% and 1.8% and insertion losses of 2.38dB and 2.89dB, respectively. Channel center frequencies of 18.8GHz and 20.7GHz provide a channel separation of approximately 9% and channel to channel isolation greater than 24dB. Utilizing machined aluminum cavities and a Duroid substrate the diplexer design provides insight into cavity based diplexer construction, allowing for the design of a silicon based micromachined cavity diplexer. Simulation results from this silicon-based diplexer are also presented. © 2000 IEEE.
Hill, MJ, Ziolkowski, RW & Papapolymerou, J 1970, 'Realization of an Active Narrow Band Filter with Electronically Controlled Defects in a Microwave Bandgap Structure', 30th European Microwave Conference, 2000, 30th European Microwave Conference, 2000, IEEE.
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Microwave band gap structures (MBG) utilizing fixed defects have received much interest because of their ability to operate as narrow band filters. With the recent interest in reconfigurable wireless devices, the need for electronically controllable narrow band filters is on the rise. By altering the defects in a MBG crystal, the transmission properties of the crystal can be changed. Using this concept, a microwave band gap crystal utilizing PIN diode defect structures has been simulated, fabricated, and tested. Through the control of the PIN diode bias current, the transmission effects caused by the crystal defects can be altered. Experiments demonstrating contrasts of more than 30 dB between the diode-on and diode-off states are presented along with FDTD simulation results. © 2000 IEEE.
Holtzman, R, Kastner, R, Heyman, E & Ziolkowski, RW 1970, 'Stability analysis of the Green's function method (GFM) used as an ABC for arbitrarily-shaped boundaries', IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.00CH37118), IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium, IEEE, SALT LAKE CITY, UT, pp. 1358-1361.
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Holtzman, R, Kastner, R, Heyman, E & Ziolkowski, RW 1970, 'The time domain discrete Green's function method (GFM) as an ABC for arbitrarily-shaped boundaries', 21st IEEE Convention of the Electrical and Electronic Engineers in Israel. Proceedings (Cat. No.00EX377), 21st IEEE Convention of the Electrical and Electronic Engineers in Israel. Proceedings, IEEE, TEL AVIV, ISRAEL, pp. 25-28.
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Huang, M 1970, 'Information Visualization in Web site mapping', World Multiconference on Systemics, Cybernetics and Informatics SCI 2000, World Multi-Conference on Systematics, Cybernetics and Informatics, IIIS, Orlando, Florida, USA, pp. 390-395.
Huang, ML & Xue, DB 1970, 'The strategy of hyperlink filtering for visual Web browsing', IC'2000: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON INTERNET COMPUTING, International Conference on Internet Computing (IC 2000), C S R E A PRESS, LAS VEGAS, NV, pp. 307-313.
Huang, ML, Lai, W & Zhang, YC 1970, 'A new visual approach for effective hypertext retrieval', ADVANCES IN MULTIMEDIA AND DATABASES FOR THE NEW CENTURY, Switzerland-Japan Joint Seminar on Advances in Multimedia and Databases for the New Century, WORLD SCIENTIFIC PUBL CO PTE LTD, ASTEM KYOTO, KYOTO, JAPAN, pp. 206-214.
Ishikawa, M, Chen, H, Furuse, K, Xu Yu, J & Ohbo, N 1970, 'MB+tree: A Dynamically Updatable Metric Index for Similarity Search', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Springer Berlin Heidelberg, pp. 356-374.
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One of the common query patterns is to find approximate matches to a given query object in a large database. This kind of query processing is referred as similarity search in a metric space. In this paper, we propose a new metric index MB+tree, called Metric B+tree, which supports near neighbour searching in a generic metric space. MB+tree is aimed at reducing both the number of I/O accesses and the number of distance calculations for similarity search in large databases, while allowing dynamic data updates. In this paper, we show that a B+tree, with an auxiliary tree, can be used as a metric index. Unlike other multidimensional (spatial) access methods, using our approach, we can partition data into disjoint partitions while building/maintaining a metric index, which can lead to a significant cost reduction since the number of metric sub-spaces to be searched is reduced. In order to use MB+tree, a slicing value is proposed. With the slicing value, in addition to space division information, a near neighbour searching can be systematically converted to a range search in B+tree. Several different slicing values are considered namely, one-focus-point scheme and two-focus-point scheme. We also conducted extensive experimental studies using synthetic data. Results are reported in this paper.
Jegatheesan, V, Ngo, H & Vigneswaran, S 1970, 'High rate filtration using buoyant medium: experiments and mathematical models', Critical Technologies to the World in 21st century: Pollution Control and Reclamation in process industries, International Water Association, Beijing, China, pp. 0-0.
Jones, EL 1970, 'Software testing in the computer science curriculum -- a holistic approach', Proceedings of the Australasian conference on Computing education - ACSE '00, the Australasian conference, ACM Press, pp. 158-162.
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© 2000 ACM. The traditional approach to introductory programming has students writing complete programs, as early as possible. Also, the traditional emphasis is on the technology, not the explicit cognitive development of the student This approach jumps to the fifth and sixth levels of Bloom's Taxonomy of Educational Objectives, when these last two levels depend upon competence in the first four levels. I describe my alternative approach that addresses the six stages in sequence, emphasising effective assessment processes for the first four levels.
Kennedy, PJ & Osborn, T 1970, 'Evolution of Adaptive Behaviour in a Simulated Single-Celled Organism', SAB 2000 Proceedings Supplement Book; Sixth International Conference on Simulation of Adaptive Behaviour: From Animals to Animats, The International Society for Adaptive Behavior, Paris, France, pp. 225-234.
Khessal, NO, Naing, MY, Hwee, ENB, Oo, PS & Antony, LHS 1970, 'Vision-based autonomous soccer robots', IEEE Region 10 Annual International Conference, Proceedings/TENCON.
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Many Al professionals consider RoboCup small league competition as an ideal platform for testing distributed and cognitive artificial intelligence techniques. Among these techniques are multi-agent system. The key characteristic of our robot soccer team is that every soccer robot is an autonomous agent, self-contained with all of its essential capabilities on-board. Even though each robot has different motivations and goals, they all share the same general architecture and basic hardware. In this paper the focus is more on the system architecture and its component more details about the Multi agent architecture could be found in.
Li, J, Ramamohanarao, K & Dong, G 1970, 'Emerging Patterns and Classification', ADVANCES IN COMPUTING SCIENCE-ASIAN 2000, PROCEEDINGS, 6th Asian Computing Science Conference, Springer Berlin Heidelberg, GEORGE TOWN, MALAYSIA, pp. 15-32.
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Li1, J, Dong, G & Ramamohanarao, K 1970, 'Instance-Based Classification by Emerging Patterns', LECTURE NOTES IN COMPUTER SCIENCE , Springer Berlin Heidelberg, pp. 191-200.
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Liang, W, Johnson, C & Yu, JX 1970, 'Maintaining Materialized Views for Data Warehouses with Multiple Remote Sources', WEB-AGE INFORMATION MANAGEMENT, PROCEEDINGS, 1st International Conference on Web-Age Information Management (WAIM 2000), Springer Berlin Heidelberg, SHANGHAI, PEOPLES R CHINA, pp. 299-311.
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Lister, R 1970, 'On blooming first year programming, and its blooming assessment', Proceedings of the Australasian conference on Computing education - ACSE '00, the Australasian conference, ACM Press, Melbourne, Australia, pp. 158-162.
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The traditional approach to introductory programming has students writing complete programs, as early as possible. Also, the traditional emphasis is on the technology, not the explicit cognitive development of the student. This approach jumps to the fifth and sixth levels of Bloom's Taxonomy of Educational Objectives, when these last two levels depend upon competence in the first four levels. I describe my alternative approach that addresses the six stages in sequence, emphasising effective assessment processes for the first four levels.
Liu, D, Zhang, N, Jeyakumaran, JM & Villanueva, L 1970, 'Dynamics and Shift Control of Automatic Transmissions', Proc. of the Fifth International Conference on Motion and Vibration Control, International Conference on Motion and Vibration Control, UTS, Sydney, australia, pp. 597-602.
Liu, D, Zhang, N, Lu, F & Q, SL 1970, 'Optimal Number and Positions of Actuators in Actively Controlled Structures', Proc. of the 5th International Conference on Motion and Vibration Control, International Conference on Motion and Vibration Control, UTS, Sydney, Australia, pp. 347-352.
Liu, PT & Zhu, JG 1970, 'Performance simulation of a linear variable reluctance permanent magnet motor with current control', Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435), 3rd International Conference on Power Electronics and Motion Control, Int. Acad. Publishers, China, pp. 602-0.
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Lu, HY, Zhu, JG, Ramsden, VS, IEEE, IEEE & IEEE 1970, 'Comparison of experimental techniques for determination of stray capacitances in high frequency transformers', PESC 2000: 31ST ANNUAL IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-3, IEEE, Ireland, pp. 1645-1650.
Lu, J, Quaddus, MA & Williams, R 1970, 'Developing a knowledge-based multi-objective decision support system', Proceedings of the Hawaii International Conference on System Sciences, p. 39.
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Decision Support Systems under Multiple Objectives (MODSS) has been classified as a specific type of system within the broad family of DSS and has been one of the most active areas of research. However, despite its theoretical development large scale real-world applications of multi-objective decision making (MODM) methods had been seriously lacking due to the technical knowledge and expertise needed to select and apply the most appropriate method. This paper explores the possibility of embedding intelligent guidance within MODSS, and outlines a specific guidance framework for the design of knowledge-based guidance for the selection of a suitable MODM method. This framework has been implemented as an intelligent and graphical user interface based multiple objective decision support system prototype. The prototype, with its database, methodology base of MODM and knowledge based system, will help any decision maker in selecting the most appropriate method in solving various MODM problems.
Marjanovic, O 1970, 'Dynamic Verification of Temporal Constraints in Production Workflows.', Australasian Database Conference, IEEE Computer Society, pp. 74-81.
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Primitive support for time management has been recognised as one of the most significant limitations of today's workflows. In this paper, we propose a new temporal model for production workflows. After introducing basic features of the temporal model, we describe two time visualisation concepts: the duration space and the instantiation space that are used respectively for representation of relative and absolute (real) time. Then, we illustrate how these concepts may be applied to modeling of absolute and relative deadline constraints and dynamic verification of their temporal consistency. The work presented sets foundations for more advanced workflow management that includes features such as monitoring of workflow execution, reasoning about deadlines as well as management of workloads and learning about deadlines.
Marjanovic, O & Orlowska, ME 1970, 'Making flexible learning more flexible', Proceedings International Workshop on Advanced Learning Technologies. IWALT 2000. Advanced Learning Technology: Design and Development Issues, International Workshop on Advanced Learning Technologies. IWALT 2000. Advanced Learning Technology: Design and Development Issues, IEEE Comput. Soc, MASSEY UNIV, PALMERSTON NORTH, NEW ZEALAND, pp. 59-62.
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Masjuki, HH, Mahlia, TMI, Choudhury, IA & Saidur, R 1970, 'A literature review on energy efficiency standards and labels for household electrical appliances', 2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium (Cat. No.00CH37119), 2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium, IEEE, KUALA LUMPUR, MALAYSIA, pp. A103-A107.
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Masjuki, HH, Saidur, R, Choudhury, IA & Mahlia, TMI 1970, 'Factors effecting energy consumption of household refrigerator-freezers', 2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium (Cat. No.00CH37119), 2000 TENCON Proceedings. Intelligent Systems and Technologies for the New Millennium, IEEE, KUALA LUMPUR, MALAYSIA, pp. A92-A96.
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McGloin, D & Dunn, MH 1970, 'Simple theory of microwave induced transparency in atomic and molecular systems', Journal of Modern Optics, 14th National Quantum Electronics Conference, Informa UK Limited, MANCHESTER, ENGLAND, pp. 1887-1897.
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McGloin, D, Turnbull, GA & Dunn, MH 1970, 'Radio frequency field manipulation of electromagnetically induced transparency', IQEC, International Quantum Electronics Conference Proceedings, p. 18.
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Electromagnetically-induced transparency (EIT) in a three-level cascade configuration is examined in 85Rb(5S1/2-5P3/2-5D5/2), and two-photon EIT processes are used to resolve the hyperfine levels in the upper level of the coupling field transition. By coupling a radio-frequency field into one of these hyperfine transitions, EIT resonances corresponding to the hyperfine levels are either inhibited or enhanced, depending on the position of the hyperfine transitions in relation to the applied radio-frequency field. The roles of level splitting and three-photon resonance peaks in the resulting spectra are discussed.
McGloin, D, Turnbull, GA, Lindsay, ID, Ebrahimzadeh, M & Dunn, MH 1970, 'Methods for extending mode-hop-free tuning using a dual-cavity, pump-enhanced optical parametric oscillator', Conference on Lasers and Electro-Optics Europe - Technical Digest, p. 15.
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Continuous wave optical parametric oscillators (OPO) are well suited for high-resolution spectroscopy applications. Common cavity doubly resonant OPOs (DRO) exhibit signal and idler tuning ranges equivalent to several cavity free spectral ranges (FSR). Changes in the idler frequency were observed using a Michelson interferometer.
Ngo, HH, Vigneswaran, S, Kim, SH, Bidkar, A & Moon, H 1970, 'Microfiltration-adsorption hybrid system in organics removal from water', Water Science and Technology, 2nd International Conference on Membrane Technology in Environmental Management, I W A PUBLISHING, TOKYO, JAPAN, pp. 51-57.
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A series of experiments was conducted with a Millipore flat plate microfiltration module modified to incorporate in-line powdered activated carbon (PAC) addition In-line PAC was mixed continuously through a spiral mixing device for a predetermined time prior entering a membrane unit. The results showed that this system is excellent in removing fulvic acid (FA). This system provides to sufficient contact time for PAC to adsorb organics compared to the system with in-line adsorbent addition. More than 85% of FA was removed from water containing 8 mg/l of FA. To achieve this following conditions were used:.(i) a velocity gradient G (mixing intensity) of 160.4 s-1; (ii) a hydraulic residence time (mixing time) of 4 minutes; (iii) a PAC dose of 260 mg/l; and (iv) membrane pore size of 0.22 μm. In case of low FA concentration (e.g. 1.2 mg/l) in water, the removal efficiency was almost 100%. The removal efficiency also increased with the increase of mixing intensity and mixing timer. The permeate flux slightly improved when a membrane of pore size 0.22 μm was used with shorter hydraulic residence time and lower PAC concentration. This paper presents a mathematical model developed based on surface diffusion. The model successfully predicted the performance of this hybrid system.
Nguyen, HT, Ha, QP, Rye, D & Durrant-Whyte, H 1970, 'Low level control of electrohydraulic systems', Japan-USA-Vietnam Workshop on research and education in systems, computation and control engineering, Institute of Applied Mechanics NCSR Vietnam, HochiMinh City Vietnam, pp. 281-291.
Nguyen, QH, Ha, QP, Rye, DC & Durrant-Whyte, HF 1970, 'Force/position tracking for electrohydraulic systems of a robotic excavator', Proceedings of the 39th IEEE Conference on Decision and Control (Cat. No.00CH37187), 39th IEEE Conference on Decision and Control, IEEE, pp. 5224-5229.
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This paper presents the sliding mode axis control of the electrohydraulic servo systems of a robotic excavator. The dynamic systems are described by a comprehensive model that accounts for nonlinearities and friction effects of asymmetric hydraulic cylinders. A sliding mode controller is developed for the electrohydraulic actuator of each working axis to provide stable force tracking. With a proper choice of the reference force, the control law can also allow tracking of a desired piston displacement trajectory. Numerical simulation demonstrates the validity of the proposed technique. Experimental results show good performance and strong robustness in both force and position following.
Nguyen, QH, Ha, QP, Rye, DC & Durrant-Whyte, HF 1970, 'Force/position tracking for systems of a robotic electrohydraulic excavator', PROCEEDINGS OF THE 39TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-5, 39th IEEE Conference on Decision and Control, IEEE, SYDNEY, AUSTRALIA, pp. 5224-5229.
O'Neill, T, Leaney, J & Martyn, P 1970, 'Architecture-based performance analysis of the COLLINS class submarine Open System Extension (COSE) Concept Demonstrator (CD)', Proceedings of the International Symposium and Workshop on Engineering of Computer Based Systems, IEEE International Conference and Workshop on the Engineering of Computer Based Systems, IEEE Computer Society, Edinburgh, UK, pp. 26-35.
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Being able to predict the overall performance of a computer based system, prior to building it, is one of the greatest challenges facing system engineers today. The emerging discipline of system architecture, by defining a high level abstraction of the overall structure of the system, hopes to provide the foundation for this reasoning. The authors demonstrate an architecture-based performance analysis technique on the COLLINS class submarine Open System Extension (COSE) Concept Demonstrator (CD) system. The layered architectural design of the COSE CD system, together with it's normally probabilistic, repeatable and predictable nature for varying loads, makes it suitable to an architecture-based approach to performance analysis. An architectural model of the system is developed and populated and then used to predict the performance characteristics of service time, waiting time, response time and device utilisation. These predictions are then verified against theoretical performance predictions and validated against a preliminary implementation of the system.
O'Neill, T, Leaney, J, Rowe, D, Simpson, H, Rangarajan, M, Weiss, J, Papp, Z, Bapty, T, Purves, B, Horvath, G & de Jong, E 1970, 'IEEE ECBS'99 TC Architecture Working Group (AWG) report', Proceedings of the International Symposium and Workshop on Engineering of Computer Based Systems, pp. 383-389.
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The guiding document for the AWG was produced by David Rowe of UTS with collaboration from Hugo Simpson, John Leaney, Willi Rossak and Christoph Schaffer. The document was entitled 'IEEE ECBS TC Architecture Focus Group Discussion Paper' and is available from www.eng.uts.edu.au/approx.drowe. The discussion paper was tabled and distributed to the AWG participants and served as a guide for the WG discussions. The AWG primarily traversed this document and therefore the section headings of this report correspond directly to those of the discussion paper with a few additions for clarification.
Oppermann, I, Kumpumaki, T & Latva-aho, M 1970, 'Capacity and coverage in mixed traffic UMTS CDMA systems', 2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536), International IEEE Symposium on Spread Spectrum Techniques and Applications (6th ISSSTA), IEEE, PARSIPPANY, NJ, pp. 470-475.
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Oppermann, I, Latva-aho, M & Kumpumaki, T 1970, 'Link quality in SIR based power control for UMTS CDMA systems', PIMRC 2000: 11TH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1 AND 2, PROCEEDINGS, 11th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2000), IEEE, LONDON, ENGLAND, pp. 1476-1479.
Oppermann, I, Latva-aho, M & Kumpumaki, T 1970, 'Link quality in SIR based power control for UMTS CDMA systems', 11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525), 11th International Symposium on Personal, Indoor and Mobile Radio Communication, IEEE, pp. 1474-1479.
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This paper examines the related issues of capacity, coverage and power control in a multi-cell WCDMA network. The network capacity in this case is based on required link quality thresholds. If all users achieve the required link SIR targets for a given percentage of all power control time slots, the network is deemed not to have exceeded its capacity. When this is 50%, the analysis reverts to the conventional mean SIR target performance. For network operators however a substantially higher link quality requirement is likely. In this case, 95% is considered. This means all users must achieve a SIR of greater than or equal to the target value for 95% of the time. The analysis is based on extended models used for IS-95 systems which relies on Gaussian assumptions of interference. This approach gives an insight into the effects of varying traffic types, different allowances for SIR targets and mixed traffic. This paper presents analysis which allows the mimum required power control to be determined based on network load and traffic mix. It also presents analysis which allows the impact of mobile by mobile power control to be examined.
Perry, S & Wyber, R 1970, 'A Hopfield neural network approach for the reconstruction of wide-bandwidth sonar data', 2000 IEEE Signal Processing Society Workshop on Neural Networks for Signal Processing X, IEEE, Sydney, NSW, Australia.
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Sonar systems with small physical apertures are easier to mount on small vessels and remotely operated vehicles (ROVs). Such systems however are limited in terms of angular resolution. Although wide-bandwidth signals may be used to increase the range resolution of a sonar system, angular resolution is unaffected. Such limitations can be overcome if the region of interest in the underwater environment is insonified from a number of different angles, and this low resolution information reconstructed into a high resolution image of the region. This paper proposes a reconstruction approach based on a Hopfield neural network. This approach is shown to perform better than the inverse Radon transform for image reconstruction under both noisy and noise-less conditions. To verify these claims, results are presented using both real and simulated sonar data.
Peters, MW & Drake, BJ 1970, 'Fundamental Robust Self-Organising Vision', Proceedings of the Fourth Japan-Australia Joint Workshop on Intelligent and Evolutionary systems, 4th Japan-Australia Joint Workshop on Intelligent and Evolutionary Systems, Yokosuka, Japan.
Rao, N, Parfitt, A, Dadello, A, Ward, D & Bird, T 1970, 'A Low Noise Ka-Band Down Converter for Space Applications', 30th European Microwave Conference, 2000, 30th European Microwave Conference, 2000, IEEE.
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A Ka-band down converter has been developed for use in a transponder to be flown on board a Low Earth Orbiting (LEO) satellite called Fedsat. The down converter employs a single Monolithic Microwave Integrated Circuit (MMIC) which combines the functions of a low noise amplifier and a mixer. The down converter unit has been designed with a particular emphasis on the choice of right materials, components, packaging and assembly techniques with a goal to achieve a low cost unit qualified for space environment. © 2000 IEEE.
Shinq-Jen Wu & Chin-Teng Lin 1970, 'Continuous time-invariant optimal fuzzy tracker design based on local concept approach', Ninth IEEE International Conference on Fuzzy Systems. FUZZ- IEEE 2000 (Cat. No.00CH37063), Ninth IEEE International Conference on Fuzzy Systems. FUZZ-IEEE 2000. Soft Computing in the Information Age, IEEE, SAN ANTONIO, TX, pp. 285-290.
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Stewart, MG 1970, 'Optimization of Durability Design Specifications for RC Structures', Advanced Technology in Structural Engineering, Structures Congress 2000, American Society of Civil Engineers.
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A structural deterioration life-cycle reliability model is used herein to calculate probabilities of cracking and spalling for typical RC structures. The influence of mix composition (water-cement ratio, concrete compressive strength) and cover on corrosion rates are included in the analysis. Life-cycle costs are estimated using time-dependent probabilities of failure calculated for annual increments over the lifetime of the structure (100 years). It was found that reducing the cover from that currently specified for design results in a significant increase in life-cycle costs. Copyright 2004 ASCE.
Su, SW, Anderson, BDO, Brinsmead, TS, SOCIETY, ICS, SOCIETY, ICS & SOCIETY, ICS 1970, 'Robust disturbance suppression for nonlinear systems based on H(infinity) control', PROCEEDINGS OF THE 39TH IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-5, IEEE, Sydney, Australia, pp. 3013-3018.
Veitch, D, Abry, P, Flandrin, P & Chainais, P 1970, 'Infinitely divisible cascade analysis of network traffic data', 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100), 2000 International Conference on Acoustics, Speech and Signal Processing, IEEE, IEEE, pp. 245-248.
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Vigneswaran, S, Kwon, DY, Ngo, HH & Hu, JY 1970, 'Improvement of microfiltration performance in water treatment: is critical flux a viable solution?', Water Science and Technology, 2nd International Conference on Membrane Technology in Environmental Management, IWA Publishing, TOKYO, JAPAN, pp. 309-315.
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In this study, three definitions for critical flux were introduced based on the crossflow microfiltration (CFMF) experiments conducted under an operational mode of constant permeate flux. The critical flux based on material balance was calculated from the rate of particles deposition. The highest permeate flux results in no particle deposition being taken at the critical flux. The second definition was based on the increase in transmembrane pressure (TMP). The critical flux based on the TMP increase is the flux below which the membrane fouling does not occur. The third definition was based on the direct observation of particles deposition through microscope. Detailed experiments were conducted with synthetic suspension of different sizes of latex particles. Long term experiments conducted with polydispersed kaolin clay suspension indicated that the critical flux based on material balance concept is more realistic in field conditions.
Wang, HL, Zhou, HQ, Feng, HQ & Guo, YG 1970, 'Error analysis and improvement on simulation algorithm of excitation propagation's process of cardiac bioelectricity', IEEE-EMBS ASIA PACIFIC CONFERENCE ON BIOMEDICAL ENGINEERING - PROCEEDINGS, PTS 1 & 2, IEEE-EMBS Asia-Pacific Conference on Biomedical Engineering, WORLD PUBLISHING CORPORATION, HANGZHOU, PEOPLES R CHINA, pp. 371-372.
Wang, QY, Yu, JX & Wong, K-F 1970, 'Approximate Graph Schema Extraction for Semi-structured Data', ADVANCES IN DATABSE TECHNOLOGY-EDBT 2000, PROCEEDINGS, 7th International Conference on Extending Database Technology, Springer Berlin Heidelberg, CONSTANCE, GERMANY, pp. 302-316.
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Ware, C, Judge, J, Chicharo, J & Dutkiewicz, E 1970, 'Unfairness and capture behaviour in 802.11 adhoc networks', 2000 IEEE International Conference on Communications. ICC 2000. Global Convergence Through Communications. Conference Record, IEEE International Conference on Communications, IEEE, pp. 159-163.
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In this paper we address issues with the performance of IEEE 802.11, when used in the adhoc mode, in the presence of hidden terminals. We present results illustrating the strong dependence of channel capture behavior on the SNR observed on contending hidden connections. Experimental work has illustrated that in a hidden terminal scenario, the connection having the strongest SNR is able to capture the channel, despite the use of the RTS-CTS-DATA-ACK 4-way handshake designed to alleviate this problem. Our results indicate that the near-far SNR problem may have a significant effect on the performance of an adhoc 802.11 network.
Wijesoma, WS & Kodagoda, KRS 1970, 'Design of stable fuzzy controllers for an AGV', Proceedings. 2000 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2000) (Cat. No.00CH37113), Proceedings. 2000 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2000), IEEE, Japan, pp. 1044-1049.
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Fuzzy logic control is a relatively new technology and hence it needs rigorous comparative analyses with other well-established conventional control schemes. Furthermore, fuzzy controller stability analysis is a major hindrance for its popularity among control engineers. This paper shows how stable fuzzy controllers may be synthesized for a typical AGV from the perspective of variable structure systems (VSS) theory. VSS or sliding model control (SMC) is an established robust nonlinear control methodology. The AGV is characterized by highly nonlinear, coupled and configuration dependent dynamics, with uncertainty in model parameters. Similarity in performance of the fuzzy controllers to the SMC controller is demonstrated through experimental results obtained for steering control of the AGV
Willey, K 1970, 'Antenna Optimization to Minimize Pointing Loss', Proceedings 6th Ka Band Utilization Conference, 6th Ka Band Utilization Conference, Instituto Internazionale Delle Comunicazioni, Cleveland, Ohio, USA..
Wu, Y, Samali, B, Li, J & Bakoss, S 1970, 'Shock test and stress analysis of a heavy metal-forge', The 7th International Symposium of Structural Failure and Plasticity, Elsevier, Melbourne, Australia, pp. 165-170.
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Xiaomei Yu, Hoang, DB & Feng, DD 1970, 'Weight-based fair intelligent bandwidth allocation for rate adaptive video traffic', Proceedings IEEE International Conference on Networks 2000 (ICON 2000). Networking Trends and Challenges in the New Millennium, IEEE ICON International Conference on Networks, IEEE Comput. Soc, p. 486.
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In this paper, we present a weight-based network bandwidth sharing algorithm, fair intelligent bandwidth allocation (FIBA) for transporting rate adaptive video traffic using feedback, and report on its performance. Through simulations the following results are obtained. The algorithm is capable of allocating bandwidth fairly for the MCR plus weighted allocation fairness criteria and MCR plus allocation proportional to PCR fairness criteria, among competitive, rate-adaptive video sources. It is able to reallocate smoothly when there are renegotiations of the minimum guaranteed cell rate, weight, or peak cell rate by some connections, or when a new connection is admitted, or when a connection is throttled somewhere earlier along the connection path. The algorithm prevents congestion, especially during the initial periods when buffer queues can build up significantly. © 2000 IEEE.
Ying, M & Wirsing, M 1970, 'Approximate bisimilarity', ALGEBRAIC METHODOLOGY AND SOFTWARE TECHNOLOGY, PROCEEDINGS, Algebraic Methodology and Software Technology, Springer-Verlag Berlin, Iowa City, Iowa, pp. 309-322.
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We introduce a notion of approximate bisimilarity in order to be able to reason about the approximate equivalence of processes. Approximate bisimilarity is based on the notion of bisimulation index for labelled transition systems. We establish some basic properties of bisimulation indexes and give a Hennessy-Milner logical characterization of approximate bisimilarity. As an application we show how to describe approximate correctness of real time systems by giving an example in real time ACP.
Yuehe Ge & Esselle, KP 1970, 'The analysis of a rectangular dielectric resonator antenna using the method of moments', IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.00CH37118), IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium, IEEE, SALT LAKE CITY, UT, pp. 1454-1457.
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Zhou, W & Wang, L 1970, 'Distributed object replication in a cluster of workstations', Proceedings Fourth International Conference/Exhibition on High Performance Computing in the Asia-Pacific Region, Proceedings Fourth International Conference/Exhibition on High Performance Computing in the Asia-Pacific Region, IEEE, pp. 889-894.
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© 2000 IEEE. This article is concerned mainly with the software aspects of building reliable and efficient services on a cluster of workstations. A key technology to achieve such a goal is service replication. However, designing and implementing a replication system is a very difficult task. Based on an active replication model, this paper focuses on an object-oriented design pattern to simplify the design and implementation of distributed replications.
Zhu, SZ, Zheng, JH, Li, L, Shen, SD, Luo, GM, IEEE & IEEE 1970, 'Effect of load modeling on voltage stability', 2000 IEEE POWER ENGINEERING SOCIETY SUMMER MEETING, CONFERENCE PROCEEDINGS, VOLS 1-4, IEEE Power-Engineering-Society Summer Meeting, IEEE, SEATTLE, WA, pp. 395-400.
Ziolkowski, RW 1970, 'Photonic Bandgap Optical Waveguide Filters', Optics InfoBase Conference Papers, Conference on Integrated Photonics Research, OPTICAL SOC AMERICA, QUEBEC CITY, CANADA, pp. 205-207.
Zowghi, D 1970, 'A requirements engineering process model based on defaults and revisions', 11TH INTERNATIONAL WORKSHOP ON DATABASE AND EXPERT SYSTEMS APPLICATION, PROCEEDINGS, International Conference on Database and Expert Systems Applications, IEEE Computer Society, Greenwich, London, UK, pp. 966-970.
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Zowghi, D, Offen, R & Nurmuliani, N 1970, 'The Impact of Requirements Volatility on the Software Development Lifecycle', 16th World Computer Congress 2000, Proceedings of Conference on Software: Theory and Practice, Publishing House of Electronics Industry, Beijing, China, pp. 19-27.
