BALL, JE 1994, 'THE INFLUENCE OF STORM TEMPORAL PATTERNS ON CATCHMENT RESPONSE', JOURNAL OF HYDROLOGY, vol. 158, no. 3-4, pp. 285-303.
View/Download from: Publisher's site
Bird, TS & Bateman, DG 1994, 'Mutual coupling between rotated horns in a ground plane', IEEE Transactions on Antennas and Propagation, vol. 42, no. 7, pp. 1000-1006.
View/Download from: Publisher's site
BOHM, B, SCHOONEES, JA & BRAUN, RM 1994, 'DATA TO FREQUENCY MAPPINGS IN VARIOUS MSK SCHEMES', ELECTRONICS & COMMUNICATION ENGINEERING JOURNAL, vol. 6, no. 1, pp. 13-20.
View/Download from: Publisher's site
View description>>
Minimum shift keying (MSK) is a digital modulation scheme which is suited to demanding applications requiring good bandwidth efficiency and error performance. It can be regarded as continuous phase frequency shift keying (CPFSK) with two signalling frequ
CANNING, J & SCEATS, MG 1994, 'PI-PHASE-SHIFTED PERIODIC DISTRIBUTED STRUCTURES IN OPTICAL FIBERS BY UV POST-PROCESSING', ELECTRONICS LETTERS, vol. 30, no. 16, pp. 1344-1345.
View/Download from: Publisher's site
CANNING, J & SCEATS, MG 1994, 'SPATIAL-DISTRIBUTION OF 650-NM LUMINESCENCE IN UV-PROCESSED GERMANOSILICATE PREFORMS', OPTICS LETTERS, vol. 19, no. 15, pp. 1119-1121.
View/Download from: Publisher's site
CAO, HT, BUCEA, L & SIRIVIVATNANON, V 1994, 'INFLUENCE OF BINDER TYPE ON ANODIC-DISSOLUTION OF STEEL EMBEDDED IN CEMENT PASTES', CEMENT AND CONCRETE RESEARCH, vol. 24, no. 2, pp. 203-213.
View/Download from: Publisher's site
Catchpoole, DR & Stewart, BW 1994, 'Inhibition of topoisomerase II by aurintricarboxylic acid: implications for mechanisms of apoptosis.', Anticancer Res, vol. 14, no. 3A, pp. 853-856.
View description>>
Internucleosomal fragmentation of DNA, the most widely used biochemical indicator of apoptosis, is believed to contribute to loss of viability because the nuclease inhibitor, aurintricarboxylic acid, delays or prevents cell death in a range of experimental systems. We report here that auritricarboxylic acid inhibits topoisomerase II in vitro, the concentration required (< or = 0.2 microM) being less than that usually employed in studies of apoptosis. Since topoisomerase II mediates chromatin condensation during apoptosis, the efficacy of ATA in preventing or delaying cell death may not be the result of nuclease inhibition.
Chin-Teng Lin & Lee, CSG 1994, 'Reinforcement structure/parameter learning for neural-network-based fuzzy logic control systems', IEEE Transactions on Fuzzy Systems, vol. 2, no. 1, pp. 46-63.
View/Download from: Publisher's site
Dharmappa, HB, Fujiwara, O, Verink, J & Vigneswaran, S 1994, 'Water‐Treatment‐System Design for Turbidity Removal.', Journal of Environmental Engineering, vol. 120, no. 4, pp. 921-942.
View/Download from: Publisher's site
Dharmappa, HB, Vigneswaran, S, Verink, J & Fujiwara, O 1994, 'Water‐Treatment‐System Design for Turbidity Removal.', Journal of Environmental Engineering, vol. 120, no. 4, pp. 900-920.
View/Download from: Publisher's site
Dissanayake, MWMG & Phan-Thien, N 1994, 'Neural-network-based approximations for solving partial differential equations', Communications in Numerical Methods in Engineering, vol. 10, no. 3, pp. 195-201.
View/Download from: Publisher's site
Dutkiewicz, E & Anido, G 1994, 'Performance evaluation of hierarchical control systems in switching exchanges', ATR. Australian telecommunication research, vol. 28, no. 1, pp. 15-24.
View description>>
Optimal placement of software functionality in distributed control systems of switching exchanges can be used to achieve a cost effective design in the ISDN and IN environments. New telecommunications services have emerged which will place quite disparate processing demands on control systems, and the optimal system configuration will depend on the call mix to be supported by the exchange. Optimal function allocation can also be used to facilitate the evolution of existing control systems to broadband network applications without the need for high-cost system re-design. A simple control system model based on queueing networks, and able to capture the main features of the system, is proposed and used to investigate the effect of various system and call parameters on the optimal function allocation. The resultant algorithms can be used as evaluation tools allowing designers to compare the performance of candidate systems to satisfy particular specifications in a cost effective manner. Applying the model to a hierarchical control system shows the potential benefits of optimal function allocation.
Esselle, KP & Stuchly, MA 1994, 'Quasi-static electric field in a cylindrical volume conductor induced by external coils [human body application]', IEEE Transactions on Biomedical Engineering, vol. 41, no. 2, pp. 151-158.
View/Download from: Publisher's site
George, SR, Zastawny, RL, Brionesurbina, R, Cheng, R, Nguyen, T, Heiber, M, Kouvelas, A, Chan, AS & Odowd, BF 1994, 'Distinct Distributions of Mu, Delta and Kappa Opioid Receptor mRNA in Rat Brain', Biochemical and Biophysical Research Communications, vol. 205, no. 2, pp. 1438-1444.
View/Download from: Publisher's site
View description>>
We present a comprehensive comparison of the anatomical distributions of the cloned mu, delta and kappa opioid receptor mRNA in rat brain. Northern blot analysis revealed that mRNA species encoding the three receptors differed in size and were differentially localized in brain regions. In peripheral tissues analyzed, the 3 mRNA species were detected only in the spinal cord. The distributions of mu, delta and kappa receptor mRNA in rat brain were examined by in situ hybridization histochemistry using gene-specific probes. Mu receptor mRNA was predominately localized to thalamic, brainstem and reticular core nuclei and was highest in the habenular and thalamic nuclei. In contrast, kappa receptor mRNA was expressed in hippocampus including dentate gyrus, hypothalamic and some thalamic nuclei and also present in cortex, caudate putamen, olfactory tubercle and nucleus accumbens. Delta receptor mRNA was prominent in cerebral cortex, olfactory tubercle, hippocampus, caudate putamen and nucleus accumbens. These results show that the mRNA distribution for each opioid receptor subtype in brain is unique and correlate well with the known distribution of the corresponding opioid receptor binding sites. © 1994 Academic Press. Inc.
Guo, YJ 1994, 'Offset Fresnel lens antenna', IEE Proceedings - Microwaves, Antennas and Propagation, vol. 141, no. 6, pp. 517-517.
View/Download from: Publisher's site
View description>>
An analysis of the offset Fresnel lens antenna is presented using the vectorial Kirchhoff diffraction theory. Equations for predicting the copolarized and crosspolarized radiation patterns are given. Two approaches to evaluating the far-field integration are introduced. Antenna performance such as the sidelobe and the crosspolarization levels is investigated. An experimental offset Fresnel lens is reported. Measured results agree well with the theoretical prediction.
Guo, YJ & Barton, SK 1994, 'Offset Fresnel zone plate antennas', International Journal of Satellite Communications, vol. 12, no. 4, pp. 381-385.
View/Download from: Publisher's site
View description>>
The theory of offset Fresnel zone plate antennas is presented. Explicit formulae for the design of the zone boundaries for the offset Fresnel zone plate are given. Theorectical equations and numerical results for the far‐field analysis are presented. It is found that when the offset angle increases, the zone boundaries become more elliptic and the plate becomes more asymmetric in the E‐plane. With the number of full wave zones and the plate width in the W‐plane fixed, the plate width in the E‐plane increases with the offset angle, which keeps the projected aperture area constant. Within a limited range of offset angles, the offset configuration can be employed without degrading the radiation performance much. For large offset angles, however, the asymmetry of the configuration may lead to increased sidelobes and decreased antenna directivity. An experiment with one particular phase reversal zone plate antenna with 30° offset angle shows good agreement between the measured antenna pattern and the theoretical prediction. Copyright © 1994 John Wiley & Sons, Ltd.
Guo, YJ, Sassi, IH & Barton, SK 1994, 'Multilayer offset Fresnel zone plate reflector', IEEE Microwave and Guided Wave Letters, vol. 4, no. 6, pp. 196-198.
View/Download from: Publisher's site
View description>>
An offset phase-correcting Fresnel zone plate (FZP) reflector antenna based on the multilayer configuration is presented. The reflector consists of a conducting ground and four layers of conducting patterns separated by four dielectric substrates. An experimental prototype designed at 10.39 GHz was fabricated and tested. With a 0.32 m by 0.34 m elliptical reflector aperture and a pyramidal feedhorn, the antenna achieved –20-dB sidelobe level and 61% maximum efficiency. Compared with a phase reversal FZP of the same size, a 3.3-dB gain improvement and significant sidelobe reduction were obtained. © 1994 IEEE
Haines, P, Nielsen, J, Druery, B & Ball, JE 1994, 'The Salmon-Q Water Quality Model: A Murray Darling Application', Water, vol. 21, no. 5, pp. 42-45.
HAWRYSZKIEWYCZ, I, KARAGIANNIS, D, MACIASZEK, L & TEUFEL, B 1994, 'RESPONSE — REQUIREMENTS SPECIFIC OBJECT MODEL FOR WORKGROUP COMPUTING', International Journal of Cooperative Information Systems, vol. 03, no. 03, pp. 293-318.
View/Download from: Publisher's site
View description>>
Assisted by the client-server architectures, power of contemporary workstations, and new multimedia, database and communication techniques, the workgroup computing (perhaps better known as CSCW — Computer-Supported Cooperative Work) is bound to change the way people in organizations collaborate to achieve common goals. New computer technologies change the way the cooperative work is conducted and they frequently lead to new practices that increase inter-personal productivity and business efficiency. This article defines a conceptual and technological framework for a class of workgroup computing applications characterized by an asynchronous distributed interaction (different-time/different-place) during the development of shared artifacts. The proposed object model is called RESPONSE (REquirements SPecific Object Network System Environment). The model is 'requirements specific' as it aims specifically at one, albeit dominant, class of workgroup applications. A particular workgroup application, chosen as representative of our model and used in examples, is the co-authoring of documents. The proposed model determines functions and support required from hardware/ software platforms for workgroup computing. The object database component of such a platform is emphasized. A distributed management of versioned objects using four levels of workspaces is proposed. The model supports long transactions with persistent locks, checkout/checkin of versioned and unversioned objects, social and technical protocols to enhance the cooperation between users, etc. The workgroup interface for the RESPONSE model is also addressed.
Hsiao, C, Lin, C & Cassidy, M 1994, 'Application of Fuzzy Logic and Neural Networks to Automatically Detect Freeway Traffic Incidents', Journal of Transportation Engineering, vol. 120, no. 5, pp. 753-772.
View/Download from: Publisher's site
HUNG, WT, SHANNON, AG & THORNTON, BS 1994, 'THE USE OF A 2ND-ORDER RECURRENCE RELATION IN THE DIAGNOSIS OF BREAST-CANCER', FIBONACCI QUARTERLY, vol. 32, no. 3, pp. 253-259.
Husain, M & Waldron, KJ 1994, 'Direct Position Kinematics of the 3-1-1-1 Stewart Platforms', Journal of Mechanical Design, vol. 116, no. 4, pp. 1102-1107.
View/Download from: Publisher's site
View description>>
In this work, a closed from solution for the direct position kinematics problem of a special class of Stewart Platform is presented. This class of mechanisms has a general feature that the top platform is connected to the six limbs at four locations. Three limbs connect at one location and the remaining limbs connect to the top platform singly at three separate locations. The base platform is connected at six different locations as is the case in the general platform. This particular class of mechanism is termed as 3-1-1-1 mechanism in this paper. It has been shown that there are a maximum of sixteen real assembly configurations for the direct position kinematics problem. This has been verified using a geometric argument also. The numerical example solved in this paper demonstrates that it is possible to obtain a set of solutions which are all real.
Indraratna, B 1994, 'Geotechnical characterization of blended coal tailings for construction and rehabilitation work', Quarterly Journal of Engineering Geology, vol. 27, no. 4, pp. 353-361.
View/Download from: Publisher's site
View description>>
Coarse and fine refuse is produced by various coal processing equipment. The relatively wet fine tailings have limited use in construction activities and they are generally pumped as slurries into tailings ponds. The coarse rejects have a greater engineering applicability and are utilized in the construction of tailings dams and mine access roads as well as for landfill and ballast. This study investigates the fundamental engineering properties of blended tailings, whereby appropriate fractions of flotation tailings are mixed with cyclone rejects to produce an acceptable construction or rehabilitation fill. In particular, a practical procedure to optimize the blended ratios, is proposed on the basis of fundamental geotechnical testing. The applications of relevent tests are described, including Proctor compaction, California Bearing Ratios, triaxial and consolidation tests. The results confirm that blending of fines with coarse rejects enables enhanced dry densities associated with reduced permeabilities, higher shear and compressive strengths, lower consolidation settlements and increased bearing capacities. The addition of a small quantity of cement (2-5%) further improves the engineering properties of the blended matrix. -from Author
Indraratna, B 1994, 'The effect of normal stress-friction angle relationship on the stability analysis of a rockfill dam', Geotechnical and Geological Engineering, vol. 12, no. 2, pp. 113-121.
View/Download from: Publisher's site
View description>>
Accurate stability analysis must consider the variation of the angle of friction of rockfill with the confining pressure. In reality, with increasing depth of a rockfill dam, the apparent friction angle decreases, whereas near the surface it tends to be higher. Conventional methods which employ a constant friction angle throughout the depth of a rockfill shell often yield a lower factor of safety (conservative) for shallow slip planes. On the contrary, they produce a higher factor of safety for deepseated slips subjected to increased normal (confining) stresses. This paper compares the constant friction angle approach with the variable friction angle method based on the stability analysis of a large rockfill dam, and the associated practical implications are discussed. In the latter analysis, the effect of normal stress on the friction angle of rockfill is incorporated through experimental observations. © 1994 Chapman & Hall.
Indraratna, B, Balasubramaniam, AS & Ratnayake, P 1994, 'Performance of Embankment Stabilized with Vertical Drains on Soft Clay', Journal of Geotechnical Engineering, vol. 120, no. 2, pp. 257-273.
View/Download from: Publisher's site
Indraratna, B, Gasson, I & Chowdhury, RN 1994, 'Utilization of compacted coal tailings as a structural fill', Canadian Geotechnical Journal, vol. 31, no. 5, pp. 614-623.
View/Download from: Publisher's site
View description>>
Detailed laboratory investigations were conducted on coal tailings produced at Westcliff Colliery, New South Wales, Australia. Geotechnical tests were conducted to determine the particle-size distribution, mineralogy, compaction characteristics, compressive strength (California bearing ratio), shear resistance, and collapse potential. The tests show that compacted tailings have good potential as effective fill for embankments, tailings dams, mine access roads, and pavements. Large-scale utilization of these tailings for rehabilitation of subsidence-affected areas and mine backfill is particularly encouraging. It is demonstrated that this waste material can be efficiently compacted to produce acceptable engineering properties over a wide range of water contents. Although the behaviour of one specific type of tailings cannot be generalized to the diverse composition of other coal tailings, the results of this study assist in the interpretation of geotechnical data associated with nonconventional fill. The use of geotextiles in the stabilization of tailings is presented. The effect of moisture content and the number of geotextile layers on the shear strength parameters is investigated, and the influence of geotextiles on the failure modes of triaxial specimens is also discussed. Key words : California bearing ratio, coal tailings, compaction, geotextiles, structural fill, triaxial testing.
Indraratna, B, Wijewardena, LSS & Balasubramaniam, AS 1994, 'Discussion: Large-scale triaxial testing of greywacke rockfill', Géotechnique, vol. 44, no. 3, pp. 539-543.
View/Download from: Publisher's site
Jaque, DT & Ball, JE 1994, 'Numerical Simulation of Advective-Diffusion Mass Transport', Journal of Hydroscience and Hydraulic Engineering, vol. 11, no. 2, pp. 49-56.
Johnson, AG 1994, 'Do Nonsteroidal Anti-inflammatory Drugs Affect Blood Pressure? A Meta-Analysis', Annals of Internal Medicine, vol. 121, no. 4, pp. 289-289.
View/Download from: Publisher's site
Johnson, AG, Crawford, GA, Kelly, D, Nguyen, TV & Gyory, AZ 1994, 'Arginine Vasopressin and Osmolality in the Elderly', Journal of the American Geriatrics Society, vol. 42, no. 4, pp. 399-404.
View/Download from: Publisher's site
Jones, G, Nguyen, T, Sambrook, P, Kelly, PJ & Eisman, JA 1994, 'Progressive loss of bone in the femoral neck in elderly people: longitudinal findings from the Dubbo osteoporosis epidemiology study', BMJ, vol. 309, no. 6956, pp. 691-695.
View/Download from: Publisher's site
Jones, G, Nguyen, T, Sambrook, PN, Kelly, PJ, Gilbert, C & Eisman, JA 1994, 'Symptomatic fracture incidence in elderly men and women: The Dubbo osteoporosis epidemiology study (DOES)', Osteoporosis International, vol. 4, no. 5, pp. 277-282.
View/Download from: Publisher's site
K. Kwan, PY & Shannon, AG 1994, 'Reliability and validity of the estimates of the Rasch latent trait model', International Journal of Mathematical Education in Science and Technology, vol. 25, no. 6, pp. 811-821.
View/Download from: Publisher's site
View description>>
The reliability and validity of the Rasch latent trait model is examined when it is used in an educational environment. Effects of the size of candidature and of the variability of the difficulties of test items are considered. It is shown that a compromise has to be reached between these two criteria in order to assess the abilities of a wide range of candidatures. © 1994 Taylor & Francis Ltd.
Krunz, M & Hughes, H 1994, 'Analysis of a Markov-Modulated Fluid Model for Multimedia Traffic with Loss and Delay Priorities', Journal of High Speed Networks, vol. 3, no. 3, pp. 309-329.
View/Download from: Publisher's site
View description>>
This paper presents a complete fluid-flow analysis of a traffic control mechanism in an ATM multiplexer, known as Nested Threshold Cell Discarding with Multiple Buffers. NTCDIMB is a buffer management scheme that implements loss and delay priority queueing strategies in order to satisfy a wide range of quality-of-service requirements. We consider a heterogeneous mix of traffic which consists of real-time traffic with a stringent cell delay requirement, and nonreal-time traffic with a stringent cell loss requirement. Moreover, a proportion of real-time cells has an additional stringent loss requirement. Cell arrivals are mode led using a fluid-flow modeling approach. The system we analyze consists of two buffers interacting via a common server. The steady-state probability distribution for the buffers' content as well as other performance statistics are obtained. Our approach is based on computing the conditional probability distributions of the buffers and using this information to find the desired unconditional stationary distributions. This approach can be used, in general, to analyze multiple dependent systems of buffers. Numerical examples based on the analysis are used along with simulations to study the performance of NTCDIMB. It is shown that NTCDIMB can be used effectively to provide performance guarantees on different cell loss and delay requirements of the traffic. © 1994 IOS Press and the authors.
LIU, YS & HOANG, DB 1994, 'OSI RPC MODEL AND PROTOCOL', COMPUTER COMMUNICATIONS, vol. 17, no. 1, pp. 53-66.
View description>>
Remote procedure call (RPC) provides a useful paradigm for developing distributed applications. The growing use of RPC in developing distributed applications has resulted in international efforts to standardize RPC mechanisms to ensure future interoperab
Lord, SR, Webster, IW, Sambrook, PN, Gilbert, C, Kelly, PJ, Nguyen, T & Eisman, JA 1994, 'Postural stability, falls and fractures in the elderly: results from the Dubbo Osteoporosis Epidemiology Study', Medical Journal of Australia, vol. 160, no. 11, pp. 684-691.
View/Download from: Publisher's site
Marchese, A, Docherty, JM, Nguyen, T, Heiber, M, Cheng, R, Heng, HHQ, Tsui, L-C, Shi, X, George, SR & O'Dowd, BF 1994, 'Cloning of Human Genes Encoding Novel G Protein-Coupled Receptors', Genomics, vol. 23, no. 3, pp. 609-618.
View/Download from: Publisher's site
View description>>
We report the isolation and characterization of several novel human genes encoding G protein-coupled receptors. Each of the receptors contained the familiar seven transmembrane topography and most closely resembled peptide binding receptors. Gene GPR1 encoded a receptor protein that is intronless in the coding region and that shared identity (43% in the transmembrane regions) with the opioid receptors. Northern blot analysis revealed that GPR1 transcripts were expressed in the human hippocampus, and the gene was localized to chromosome 15q21.6. Gene GPR2 encoded a protein that most closely resembled an interleukin-8 receptor (51% in the transmembrane regions), and this gene, not expressed in the six brain regions examined, was localized to chromosome 17q21.1-q21.3. A third gene, GPR3, showed identity (56% in the transmembrane regions) with a previously characterized cDNA clone from rat and was localized to chromosome 1p35-p36.1. © 1994 Academic Press, Inc.
Morrison, NA, Qi, JC, Tokita, A, Kelly, PJ, Crofts, L, Nguyen, TV, Sambrook, PN & Eisman, JA 1994, 'Prediction of bone density from vitamin D receptor alleles', Nature, vol. 367, no. 6460, pp. 284-287.
View/Download from: Publisher's site
Newell, P & Bird, TS 1994, 'Effects of mutual coupling in the design of high-performance multifeed satellite antennas', Radio Science, vol. 29, no. 1, pp. 145-152.
View/Download from: Publisher's site
Nguyen, T, Jones, G, Sambrook, P, Kelly, P, Lord, S, Freund, J & Eisman, J 1994, 'Authors' reply', BMJ, vol. 308, no. 6923, pp. 274-275.
View/Download from: Publisher's site
Nguyen, TV, Kelly, PJ, Sambrook, PN, Gilbert, C, Pocock, NA & Eisman, JA 1994, 'Lifestyle factors and bone density in the elderly: Implications for osteoporosis prevention', Journal of Bone and Mineral Research, vol. 9, no. 9, pp. 1339-1346.
View/Download from: Publisher's site
Parfitt, AM, Nguyen, TV, Kelly, PJ, Morrison, NA, Sambrook, PN, Eisman, JA, Melhus, H, Kindmark, A & Ljunghall, S 1994, 'Vitamin D receptor genotypes in osteoporosis', The Lancet, vol. 344, no. 8936, pp. 1580-1581.
View/Download from: Publisher's site
PRASANTHI, H, VIGNESWARAN, S, WAITE, TD & BENAIM, R 1994, 'FILTRATION OF SUBMICRON PARTICLES - EFFECT OF IONIC-STRENGTH AND ORGANIC-SUBSTANCES', WATER SCIENCE AND TECHNOLOGY, vol. 30, no. 9, pp. 149-158.
View/Download from: Publisher's site
View description>>
Hematite (-Fe2O3) suspension was used in this study to investigate the effects of aggregate size and solution chemical characteristics on particle removal and headloss development in a deep bed filter. When electrolyte (KCl) concentration in the suspension was increased from 0-80 mM, the size of hematite aggregates in suspension increased from 85 to 990 nM but had no significant effect on zeta potential. It was found that at low KCl concentrations (0-10 mM), the initial removal is governed by surface chemical properties while at higher concentrations (40-80 mM), the effect of particle size (steric effect) predominates. The transient stage filter performance was found to be controlled by the favourable chemical conditions prevailing in the filtration system rather than the size of the particles. Studies of the effect of a natural organic material (fulvic acid) on particle removal indicated that fulvic acid at low concentrations (less than 0.75 mg/L) enhanced particle aggregation and improved filtration efficiency. At concentrations higher than 2 mg/L, it was found to increase the stability of particles thus affecting filtration efficiency.
Sambrook, PN, Kelly, PJ, Fontana, D, Nguyen, T, Keogh, A, Macdonald, P, Spratt, P, Freund, J & Eisman, JA 1994, 'Mechanisms of rapid bone loss following cardiac transplantation', Osteoporosis International, vol. 4, no. 5, pp. 273-276.
View/Download from: Publisher's site
Shannon, AG & Horadam, AF 1994, 'Arrowhead curves in a tree of Pythagorean triples', International Journal of Mathematical Education in Science and Technology, vol. 25, no. 2, pp. 255-261.
View/Download from: Publisher's site
View description>>
Pythagorean triples and recurrence relations occur in many parts of mathematics. This paper links them in a way which reveals an underlying pattern of 'arrowhead curves', © 1994 Taylor & Francis Ltd.
SHANNON, AG & OWENS, DR 1994, 'MODELING METABOLIC CURVES', DIABETES CARE, vol. 17, no. 10, pp. 1225-1225.
View/Download from: Publisher's site
SHANNON, AG, HOGG, JM, OLLERTON, RL, LUZIO, S & OWENS, DR 1994, 'A MATHEMATICAL-MODEL OF INSULIN-SECRETION', IMA JOURNAL OF MATHEMATICS APPLIED IN MEDICINE AND BIOLOGY, vol. 11, no. 4, pp. 245-266.
Shimizu, J, Miyanaga, Y & Tochinai, K 1994, 'Decimation ratio in subband adaptive identification of a time-varying AR model', Electronics and Communications in Japan (Part III: Fundamental Electronic Science), vol. 77, no. 11, pp. 78-90.
View/Download from: Publisher's site
Tokita, A, Kelly, PJ, Nguyen, TV, Qi, JC, Morrison, NA, Risteli, L, Risteli, J, Sambrook, PN & Eisman, JA 1994, 'Genetic influences on type I collagen synthesis and degradation: further evidence for genetic regulation of bone turnover.', The Journal of Clinical Endocrinology & Metabolism, vol. 78, no. 6, pp. 1461-1466.
View/Download from: Publisher's site
View description>>
Circulating osteocalcin, a marker of bone formation, is under strong genetic influence, and this effect is related to the genetic influence on bone density. To examine genetic influences on bone turnover further, other markers of bone formation (serum carboxyterminal propeptide of type I procollagen, PICP), bone resorption (serum pyridinoline cross-linked carboxyterminal telopeptide of type I collagen, ICTP), and nonosseous connective tissue synthesis (serum aminoterminal propeptide of type III procollagen, PIIINP) were studied in 82 female twin pairs: 42 monozygotic (MZ) and 40 dizygotic (DZ) twin pairs (mean age, MZ; 48.4 yr; DZ; 45.6 yr). The intraclass correlation coefficients of MZ twin pairs, rMZ, for serum PICP (0.78) and serum ICTP (0.68) were significantly greater than the corresponding rDZ (0.31 and 0.36, respectively), but a genetic effect on serum PIIINP was not demonstrable. Within DZ twin pair differences in serum PICP predicted differences in lumbar spine bone density (r = -0.37); higher serum PICP levels indicating the twin with the lower lumbar spine bone density. Also within pair differences in serum ICTP and PICP predicted differences in bone density at the lumbar spine independent of serum osteocalcin. These data indicate that both synthesis and degradation of type I collagen are genetically determined and that this phenomenon is related to the genetic regulation of bone density. © 1994 by The Endocrine Society.
Veitch, D 1994, 'Renormalization of C0 bimodal maps', Physica D: Nonlinear Phenomena, vol. 71, no. 3, pp. 269-284.
View/Download from: Publisher's site
Voinov, A, Cibuzar, A & Nawrocki, T 1994, 'Sustainable Development on a Watershed Scale Russian Case Study—Pronya River', Lake and Reservoir Management, vol. 9, no. 1, pp. 46-50.
View/Download from: Publisher's site
Waldron, KJ 1994, 'Solution Rectification in Three Position Motion Generation Synthesis', Journal of Mechanical Design, vol. 116, no. 1, pp. 88-91.
View/Download from: Publisher's site
View description>>
In this paper the theory of solution rectification in motion generation synthesis of four-bar linkages is strengthened by presenting the mapping of the three-circle diagram into the center-point plane. This mapping may be used in conjunction with the corresponding mapping of the Filemon construction to eliminate solutions which must change branch to move through all of the design positions when cranks are generated by selecting their center-points. Earlier versions of the theory required that cranks be generated by selection of their circle-points.
Walker, JS, Nguyen, TV & Day, RO 1994, 'Clinical response to non-steroidal anti-inflammatory drugs in urate- crystal induced inflammation: a simultaneous study of intersubject and intrasubject variability.', British Journal of Clinical Pharmacology, vol. 38, no. 4, pp. 341-347.
View/Download from: Publisher's site
Xuecheng, L & Guangquan, Z 1994, 'Lattice-valued fuzzy measure and lattice-valued fuzzy integral', Fuzzy Sets and Systems, vol. 62, no. 3, pp. 319-332.
View/Download from: Publisher's site
Yimin Guo, Jian-Gang Zhu & Liao, SH 1994, 'Study of SAL-biased MR heads with patterned permanent magnet bias', IEEE Transactions on Magnetics, vol. 30, no. 6, pp. 3861-3863.
View/Download from: Publisher's site
YING, MS 1994, 'A LOGIC FOR APPROXIMATE REASONING', JOURNAL OF SYMBOLIC LOGIC, vol. 59, no. 3, pp. 830-837.
View/Download from: Publisher's site
View description>>
NA
YING, MS 1994, 'ON THE METHOD OF NEIGHBORHOOD-SYSTEMS IN FUZZY TOPOLOGY', FUZZY SETS AND SYSTEMS, vol. 68, no. 2, pp. 227-238.
View/Download from: Publisher's site
View description>>
In this paper, we revivify the theory of neighborhood systems in fuzzy topology with the method used to develop fuzzifying topology and find another kind of reasonable neighborhood structure in fuzzy topology except quasi-neighborhood systems of Pu and L
Zhou, JL, Rowland, S, Fauzi, R, Mantoura, C & Braven, J 1994, 'The formation of humic coatings on mineral particles under simulated estuarine conditions—A mechanistic study', Water Research, vol. 28, no. 3, pp. 571-579.
View/Download from: Publisher's site
ALEM, L, LEE, M & MONIER, C 1970, 'AN INTELLIGENT TUTORING SYSTEM FOR A SONAR APPLICATION IN AUSTRALIA', MOVING TOWARD EXPERT SYSTEMS GLOBALLY IN THE 21ST CENTURY, 2nd World Congress on Expert Systems - Moving Towards Expert Systems Globally in the 21st-Century, COGNIZANT COMMUNICATION CORP, LISBON, PORTUGAL, pp. 229-236.
BABISTER, KM, BALL, JE & INST ENGINEERS, A 1970, 'A REVIEW OF NUMERICAL PROCEDURES FOR ROUTING UNSTEADY FLOWS ALONG A DRY BED', 1994 INTERNATIONAL CONFERENCE ON HYDRAULICS IN CIVIL ENGINEERING - HYDRAULICS WORKING WITH THE ENVIRONMENT, PREPRINTS OF PAPERS, 1994 International Conference on Hydraulics in Civil Engineering - Hydraulics Working with the Environment, INST ENGINEERS AUSTRALIA, UNIV QUEENSLAND BRISBANE, BRISBANE, AUSTRALIA, pp. 43-48.
Ball, JE & Ferguson, D 1970, 'Enhancements to the stormwater management model for simulation of urban runoff', National Conference Publication - Institution of Engineers, Australia, pp. 293-298.
View description>>
The Stormwater Management Model has been developed continuously over the past two decades. As part of this continual development, The School of Civil Engineering at the University of New South Wales has implemented numerical algorithms for solution of kinematic waves which have been used for describing overland flow processes. These numerical algorithms have been introduced into the RUNOFF block while minimising changes to the code. Existing methods and concepts have been adhered to where feasible. In addition, no alteration to the user input requirements has been made.
Ball, JE & Price, G 1970, 'Application of KINEROS to the eastern creek catchment', National Conference Publication - Institution of Engineers, Australia, pp. 157-162.
View description>>
Over the past three decades, many alternative models have been proposed for the simulation of surface runoff from catchments. In general, these models attempt to simulate the transmission of rainfall through the catchment storage to the outlet of the catchment. One methodology which has been proposed for this simulation is the application of kinetic wave theory to describe water motion over planar surfaces. While models of this type have been used extensively overseas, their application to Australian catchments has been limited. Outlined herein is the application of one such model to the Eastern Creek catchment; a 25km2 catchment which has been gauged extensively by the Department of Water Engineering at the University of New South Wales. While the ability of the model to reproduce flood events of the same order of magnitude was tested, additional testing was undertaken on flood events with quite different peak flow rates. The results of this testing are presented.
Ball, JE, Hogan, PM, Batley, GE & Brockbank, C 1970, 'Assessing the quantity and quality of stormwater runoff from road surfaces', National Conference Publication - Institution of Engineers, Australia, pp. 299-304.
View description>>
The community is concerned about many aspects of the aquatic environment. Recently the focus of this attention has been the contamination of water bodies arising from stormwater runoff. Discussed herein is a project currently being undertaken by the Department of Water Engineering of the School of Civil Engineering at the University of New South Wales and the Centre for Advanced Analytical Chemistry, CSIRO which is studying stormwater runoff from road surfaces. A particular focus of this study is development of an understanding of the removal of heavy metal pollutant constituents such as Pb, Cu, Zn. A review of available data concluded that insufficient data were available to enable the processes involved to be understood and hence there was a need to establish a field gauging station specific to this problem. Presented in this paper are some details of the field gauging station installed as part of this project and some preliminary information obtained from it.
BAWEJA, D, SIRIVIVATNANON, V, GROSS, W & LAURIE, G 1970, 'High-performance Australian concretes for marine applications', HIGH-PERFORMANCE CONCRETE - PROCEEDINGS, ACI INTERNATIONAL CONFERENCE, ACI International Conference on High-Performance Concrete, AMER CONCRETE INST, SINGAPORE, SINGAPORE, pp. 363-377.
Cheng-Jian Lin & Chin-Teng Lin 1970, 'An ART-based fuzzy adaptive learning control network', NAFIPS/IFIS/NASA '94. Proceedings of the First International Joint Conference of The North American Fuzzy Information Processing Society Biannual Conference. The Industrial Fuzzy Control and Intelligent Systems Conference, and the NASA Joint Technology Wo, NAFIPS/IFIS/NASA '94. First International Joint Conference of The North American Fuzzy Information Processing Society Biannual Conference. The Industrial Fuzzy Control and Intelligent Systems Conference, and the NASA Joint Technology Workshop on Neural Networks and Fuzzy Logic, IEEE, pp. 357-362.
View/Download from: Publisher's site
View description>>
This paper addresses the structure and associated on-line learning algorithms of a feedforward multilayered connectionist network for realizing the basic elements and functions of a traditional fuzzy logic controller. The proposed Fuzzy Adaptive Learning Control Network (FALCON) can be contrasted with the traditional fuzzy logic control systems in their network structure and learning ability. An on-line structure/parameter learning algorithm, called FALCON-ART, is proposed for constructing the FALCON dynamically. The FALCON-ART can partition the input/output space in a flexible way based on the distribution of the training data. Hence it can avoid the problem of combinatorial growing of partitioned grids in some complex systems. It combines the backpropagation learning scheme for parameter learning and the fuzzy ART algorithm for structure learning. More notably, the FALCON-ART can on-line partition the input/output spaces, tune membership functions and find proper fuzzy logic rules dynamically without any a priori knowledge or even any initial information on these.
Chin-Teng Lin 1970, 'FALCON: a fuzzy adaptive learning control network', NAFIPS/IFIS/NASA '94. Proceedings of the First International Joint Conference of The North American Fuzzy Information Processing Society Biannual Conference. The Industrial Fuzzy Control and Intelligent Systems Conference, and the NASA Joint Technology Wo, NAFIPS/IFIS/NASA '94. First International Joint Conference of The North American Fuzzy Information Processing Society Biannual Conference. The Industrial Fuzzy Control and Intelligent Systems Conference, and the NASA Joint Technology Workshop on Neural Networks and Fuzzy Logic, IEEE, pp. 228-232.
View/Download from: Publisher's site
View description>>
This paper proposes a Reinforcement Fuzzy Adaptive Learning COntrol Network (RFALCON) for solving various reinforcement learning problems. The proposed RFALCON is constructed by integrating two Fuzzy Adaptive Learning COntrol networks (FALCON), each of which is a connectionist model with a feedforward multilayered network developed for the realization of a fuzzy logic controller. An on-line structure/parameter learning algorithm, called RFALCON-ART, is proposed for constructing the RFALCON dynamically. The proposed R-FALCON also preserves the advantages of the original FALCON, such as the ability to do on-line partition the input/output spaces, tune membership functions, and find proper fuzzy logic rules. In its initial form, there is no membership function, fuzzy partition, and fuzzy logic rule. They are created and begin to grow as the first reinforcement signal arrives. The users thus need not give it any a priori knowledge or even any initial information on these.
Cucchiara, R, Di Stefano, L, Monacelli, M, Piccardi, M & Rustichelli, G 1970, 'A parallel vision subsystem for robotic inspection and manipulation', Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics, IECON'94 - 20th Annual Conference of IEEE Industrial Electronics, IEEE, pp. 862-866.
View/Download from: Publisher's site
View description>>
The paper describes an SIMD massively parallel computer conceived for robot vision, and presents an application where the system is installed on a mobile robot to support inspection and manipulation tasks. The system consists of a scalable array of up to 4K single-bit processors controlled by a general-purpose microcomputer through a dedicated interface. The system's architecture is overviewed, addressing the available prototype as well as the functional units currently under design. We provide examples of image analysis goals that can be efficiently reached using spatially-organized parallel architectures such as SIMD array and give measurements of present performances. Using code profiles we also evaluate the speedup associated with the configuration being designed.
Cuthbert, J, Crawford, B & Braun, RM 1970, 'A multi-oscillator approach to CPFSK signal creation', Proceedings of COMSIG '94 - 1994 South African Symposium on Communications and Signal Processing, COMSIG '94 - 1994 South African Symposium on Communications and Signal Processing, IEEE, pp. 20-23.
View/Download from: Publisher's site
View description>>
The development of a MSK modulator/demodulator by Massey [1] and the Hodgart and Schoones implementation [2] has prompted the development of a multi-oscillator multi-h modulator/demodulator. The approach taken has been an investigation and extension of basic CPFSK multi-oscillator modulator/demodulator design using digital logic. In this paper the multi-oscillator MSK modulator as developed by Massey [1] is first re-examined before introducing the scheme developed by Crawford [3]. Thereafter elements of the related digital logic demodulator design are discussed.
Davidson, AM, van de Groenendaal, J & Braun, RM 1970, 'A novel code phase synchronization network for direct sequence spread spectrum', Proceedings of COMSIG '94 - 1994 South African Symposium on Communications and Signal Processing, COMSIG '94 - 1994 South African Symposium on Communications and Signal Processing, IEEE, pp. 95-98.
View/Download from: Publisher's site
View description>>
Direct sequence spread spectrum systems require that the receiver's replica of the spreading waveform be in code-phase and frequency lock with that of the transmitter's. Present methods of achieving synchronization involve correlation and energy detection. This paper presents the development of an alternative synchronization network. The network is a novel robust feedback loop where the input is the differentiated transmitter pseudo-noise sequence. The effects of these positive and negative going voltage spikes modulate the receiver clock until lock is achieved. The loop is further adapted to a data driven environment.
GAY, V, LEYDEKKERS, P & INTVELD, RH 1970, 'SPECIFICATION OF AUDIO VIDEO EXCHANGE BASED ON THE REFERENCE MODEL OF ODP', BROADBAND ISLANDS '94 - CONNECTING WITH THE END-USER, 3rd International Conference on Broadband Islands - Connecting with the End-User, ELSEVIER SCIENCE PUBL B V, HAMBURG, GERMANY, pp. 179-191.
Golda, PJ, Benzakein, A, van de Groenendaal, JG & Braun, RM 1970, 'VLSI appropriate design of a trace-back Viterbi decoder', Proceedings of COMSIG '94 - 1994 South African Symposium on Communications and Signal Processing, COMSIG '94 - 1994 South African Symposium on Communications and Signal Processing, IEEE, pp. 76-80.
View/Download from: Publisher's site
View description>>
This paper concerns the research into the implementation of an efficient Viterbi algorithm for the decoding of convolutional codes. The original algorithm, as presented by Truong in his 1992 paper, is described, with many new points being noted. A detailed discussion of the improvements made to the algorithm follows, along with a full example of the operation of the algorithm.
Hadgraft, RG & Daniell, TM 1970, 'Obtaining the art of hydrological modelling using problem based learning', National Conference Publication - Institution of Engineers, Australia, pp. 645-650.
View description>>
The development, the positive aspects, the negative aspects and the useability of particular hydrologic models have been discussed extensively at recent conferences. In discussing hydrological modelling, and areas that need to be addressed, it becomes increasingly obvious that the real problem is not so much inadequate models, as inadequate users. Training and education of the users are increasingly important, and this paper attempts to describe an approach that rather than teaching models, encourages the art and skills of modelling. Problem-Based Learning (PBL) is a way of reversing the present trend of pushing more direct content into the courses; one aspect is to teach a process such as modelling, as well as a selection of models. Models will come and go, but modelling is a skill that will continue. In Problem Based Learning, a problem is presented in its context as much as possible. Several concepts may be incorporated into a single problem. With the choice of problem based learning, the student modeller is confronted immediately with the big issues, rather than hydrological processes. The connection of the problems and the topics is shown in this paper via a concept map, indicating appropriate interrelationships. Monash University has already moved its hydrology course at third year somewhat along the lines of PBL. Environmental Engineering programs, which encompass much of the hydrology courses within their frameworks, are shown to be particularly appropriate for this method of learning.
Hawryszkiewycz, I 1970, 'A generalized semantic model for CSCW systems', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Springer Berlin Heidelberg, pp. 93-102.
View/Download from: Publisher's site
View description>>
The paper describes a method for modeling CSCW systems. The method is general in the sense that it caters for the entire spectrum of CSCW work and is based on both theoretical foundations as well as empiric principles. A three level model is proposed, a high level interaction model, a detailed elaboration of model constructs and behaviour based on state transitions.
Hawryszkiewycz, IT 1970, 'CSCW as a basis for interactive design semantics', Proceedings of the workshop on Advanced visual interfaces - AVI '94, the workshop, ACM Press.
View/Download from: Publisher's site
Hui, SYR & Zhu, J 1970, 'Magnetic hysteresis modeling and simulation using the Preisach theory and TLM technique', Proceedings of 1994 Power Electronics Specialist Conference - PESC'94, 1994 Power Electronics Specialist Conference - PESC'94, IEEE, TAIPEI, TAIWAN, pp. 837-842.
View/Download from: Publisher's site
Kervella, B, Gay, V & Horlait, E 1970, 'Towards a complete multimedia mail: Use of MHEG in standard messaging systems', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Springer Berlin Heidelberg, pp. 1-13.
View/Download from: Publisher's site
View description>>
© 1994, Springer Verlag. All Rights Reserved. This paper addresses multimedia aspects in messaging services. It highlights the functionalities that are missing to provide what we call a complete multimedia mail service and it gives standard solutions to integrate those additional functionalities in standard messaging systems. A complete multimedia messaging system does not provide only means to exchange simple multimedia messages having a reasonable size. It should first enable the transfer of multimedia information, directly or by references (e.g. for huge message). In case it uses a reference, files may be retrieved in connected mode. This is, in fact, already included in most messaging systems. Second, it should also be open to the introduction of new media types. This requires the introduction of functionalities to prevent the fact some workstations cannot support those media types. Third, it should enable the composition, the exchange and the presentation of formatted multimedia messages. MIME and X.400-based solutions are presented for the two first issues. For the third issue, we have chosen MHEG as a basis. This future standard is promising and this paper presents how to implement MHEG functionalities in messaging systems.
Leydekkers, P & Gay, V 1970, 'Multimedia Conferencing Services in an Open Distributed Environment.', IWACA, Springer, pp. 339-352.
View/Download from: Publisher's site
View description>>
© 1994, Springer Verlag. All rights reserved. Distributed Processing Environments (DPE) or platforms are regarded as the future telecommunication architecture [1] on which distributed applications such as Multimedia Conferencing (MMC) services will operate. Using the DPE as target telecommunication platform, an important issue for MMC designers is the specification of generic MMC interfaces. This enables MMC users to access, in a distribution transparent way, a wide range of MMC services, that conform to these interface specifications. This paper proposes a classification of MMC services by means of three generic interface templates. These interface templates describe in an implementation independent way the functionality and management related to MMC services. The paper discusses also a possible implementation of these interfaces. Techniques and concepts are used as proposed by RM-ODP [2] and TINA-C [1].
Lin, CJ & Lin, CT 1970, 'ART-based fuzzy adaptive learning control network', IEEE International Conference on Fuzzy Systems, pp. 1-5.
View description>>
This paper addresses the structure and associated on-line learning algorithms of a feedforward multilayered connectionist network for realizing the basic elements and functions of a traditional fuzzy logic controller. The proposed Fuzzy Adaptive Learning COntrol Network (FALCON) can be contrasted with the traditional fuzzy logic control systems in their network structure and learning ability. An on-line structure/parameter learning algorithm, called FALCON-ART, is proposed for constructing the FALCON dynamically. The FALCON-ART can partition the input/output space in a flexible way based on the distribution of the training data. Hence it can avoid the problem of combinatorial growing of partitioned grids in some complex systems. It combines the backpropagation learning scheme for parameter learning and the fuzzy ART algorithm for structure learning. More notably, the FALCON-ART can on-line partition the input/output spaces, tune membership functions and find proper fuzzy logic rules dynamically without any a priori knowledge or even any initial information on these.
Logé, C, Gay, V & Horlait, E 1970, 'Computational components for synchronous cooperation on multimedia information', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Springer Berlin Heidelberg, pp. 89-102.
View/Download from: Publisher's site
View description>>
© 1994, Springer Verlag. All Rights Reserved. Nowadays, the design of cooperative applications is becoming more complex due to the introduction of real time cooperation and multimedia aspects. To ease and accelerate the development of these applications it is necessary to build modular and reusable functional components that can be used by application designers. The objective of this paper is to define some of those functional components. They will be integrated in the cooperative applications to ensure the synchronous cooperation on multimedia objects. For openness and possible wide use in an open distributed heterogeneous environment, the specification of those components is based on the computational language of the Reference Model of Open Distributed Processing (RMODP).
Nkambule, VO & Braun, RM 1970, 'Power spectral density of duobinary-signalled minimum shift keying (MSK) with arbitrary pulse shaping', pp. 16-19.
View description>>
We present a general method for computing the power spectral density (PSD) of a partial-response, continuous phase modulated (CPM), constant-envelope signal. The modulation scheme employed is minimum shift keying (MSK). The frequency modulating signals are a random baseband pulse train in which the arbitrary pulse is time limited. Random data symbols transmitted during different time slots are assumed to be identically distributed and statistically independent.
Oppermann, I & Vucetic, BS 1970, 'Complex pseudo random spreading sequences with a wide range of correlation properties', 1994 IEEE GLOBECOM. Communications: The Global Bridge, 1994 IEEE GLOBECOM. Communications: The Global Bridge, IEEE, SAN FRANCISCO, CA, pp. 1738-1742.
View/Download from: Publisher's site
Oppermann, I & Vucetic, BS 1970, 'Complex valued spreading sequences with good cross-correlation properties', IEEE International Symposium on Spread Spectrum Techniques & Applications, pp. 500-504.
View description>>
This paper examines the performance of sets of Pseudo Random (PR) Sequences using the criterion of least mean-square (MS) values of the aperiodic cross-correlation (CC). The MS correlation values are averaged over all elements in the set rather than the more traditional approach of taking the MS correlation values of randomly selected elements as representative. This is intended to give an indication of the performance of the set as a whole. This paper introduces a new family of constant amplitude, complex valued sequences designed using the criterion of least MS value of the CC values of all sequences in the set. This family of sequences is compared with well known sequences on the basis of correlation values and frequency characteristics and is shown to offer a wider range and better combination of correlation values. The paper also provides a limit on the lower bound of the value of the MS CC for the new family of complex sequences and members of the family are given for which the average MS value of the CC asymptotically approaches this bound. The potential tradeoff of CC values for auto-correlation (AC) is also illustrated.
Oppermann, I & Vucetic, BS 1970, 'Spread spectrum multiple-access system using orthogonal PN sequences and convolutional coding', National Conference Publication - Institution of Engineers, Australia, pp. 103-108.
View description>>
This paper considers the performance of a Direct Sequence Spread Spectrum (DSSS) system in which each user has multiple pseudo-noise (PN) sequences available for the spreading process. Information is thus transmitted through phase modulation of the sequence and the choice of the sequence itself. The sequences used are Orthogonal Gold (OG) sequences and are described in this paper. This paper also considers the performance of this M-ary sequence system with convolutional encoding. The code rates are chosen so that for each data bit, the number of coded bits produced matches the number of bits associated with the choice of spreading sequence. Simulation shows that using this method, it is possible to not only increase the capacity of the system over the conventional 'uncoded' DSSS-MA system, but also allow more independent users to share the system at any time.
Oppermann, I, Rapajic, P & Vucetic, BS 1970, 'Pseudo random sequences with good cross-correlation properties', National Conference Publication - Institution of Engineers, Australia, pp. 1001-1006.
View description>>
This paper examines the performance of particular sets of Pseudo Random (PR) Sequences constructed using the criterion of least mean-square values of the aperiodic cross-correlation. The criterion is modified slightly from previous publications to involve the average mean-square correlation values of the sequences in the set rather than simply taking the mean-square correlation values of randomly selected elements as representative. This paper introduces a new set of constant amplitude, poly-phase sequences designed using the criterion of least mean-square value of the cross-correlation values of all sequences in the set. The paper also provides a limit on the lower bound of the value of the mean-square cross-correlation for the new set of poly-phase sequences. It is shown that a subset of one of these new sequence sets asymptotically approaches this lower bound.
OUELLETTE, F, CANNING, J, EGGLETON, B, HILL, P, KING, PA, SCEATS, MG & IEEE 1970, 'ADDING FUNCTIONALITY TO FIBRE BRAGG GRATINGS', LEOS '94 - CONFERENCE PROCEEDINGS, VOL 2, 7th Annual Meeting of the IEEE Lasers-and-Electro-Optics-Society, I E E E, BOSTON, MA, pp. 129-130.
Prasanthi, H, Vigneswaran, S, Waite, TD & Aim, RB 1970, 'Filtration of submicron particles: effect of ionic strength and organic substances', Water Science and Technology, IWA Publishing, pp. 149-158.
View/Download from: Publisher's site
View description>>
Hematite (α-Fe2O3) suspension was used in this study to investigate the effects of aggregate size and solution chemical characteristics on particle removal and headloss development in a deep bed filter. When electrolyte (KCl) concentration in the suspension was increased from 0-80 mM, the size of hematite aggregates in suspension increased from 85 to 990 nM but had no significant effect on zeta potential. It was found that at low KCl concentrations (0-10 mM), the initial removal is governed by surface chemical properties while at higher concentrations (40-80 mM), the effect of particle size (steric effect) predominates. The transient stage filter performance was found to be controlled by the favourable chemical conditions prevailing in the filtration system rather than the size of the particles.
Studies of the effect of a natural organic material (fulvic acid) on particle removal indicated that fulvic acid at low concentrations (less than 0.75 mg/L) enhanced particle aggregation and improved filtration efficiency. At concentrations higher than 2 mg/L, it was found to increase the stability of particles thus affecting filtration efficiency.
Roper, H, Sirivivatnanon, V & Baweja, D 1970, 'Long-term performance of portland and blended cement concretes under morine conditions', American Concrete Institute, ACI Special Publication, pp. 331-351.
View description>>
Specifications relating to concrete durability have been emphasised in many recent codes of practice governing the design of concrete structures. Typical examples of this trend are noted in Australian Standard AS 3600, British Standard BS 8110 and a Guide to Durable Concrete reported by ACI Committee 201. Apart from the requirements of higher strength grades to ensure required minimum water: Cement ratios for aggressive environment exposures, some advantages offered by the use of blended cements have been recognised in these documents. The use of blended slag and fly ash cements is increasing worldwide and specific information on the long-term performance of such concretes in high chloride environments is needed. This paper presents data on the long-term corrosion characteristics in high chloride environments of reinforcement within a series of concretes individually incorporating a high C3A ordinary portland cement, a low C3A cement, a slag blended cement and an ASTM Class F fly ash blended cement. The concrete performance has been assessed using electrochemical monitoring of corrosion of the embedded reinforcement by potentiodynarnic anodic polarisation and the concrete resistivity. Factors that significantly influence the corrosion rate of the reinforcement include the concrete water: Binder ratio, the binder type and the resistivity. Comments are made regarding current North American, British and Australian specifications for concrete under marine service conditions. From the data presented, the specification for long-term durability of concrete for marine conditions could be based on concrete resistivity with a suggested limit of around 5000 ohm cm at 28 days.
Sheng, D, Axelsson, K & Knutsson, S 1970, 'Estimation of frost heave for stratified soil profile', GROUND FREEZING 94, 7th International Symposium on Ground Freezing, A A BALKEMA, LAB REG PONTS & CHAUSSEES, NANCY, FRANCE, pp. 129-141.
View description>>
An operational model for estimation of frost heave in field where stratified soil profile occurs is presented. The model is developed from the research model described and verified by Sheng and Knutsson (1993). Soil layers are first classified into frost-susceptible layers (FSL) or non-frost-susceptible layers (NFSL). In an FSL, both heat flow and water flow are considered and ice lensing can occur. In a NFSL, only heat flow is possible and no ice lensing is allowed. The governing equations for heat and mass transfer are established for the time period when the frost front is moving within FSL. Capillarity and unsaturation are also considered. The operational model is verified by field measurements of heave amounts. The computed values of heave are in good agreement with the measured data. The applicability of the model to solving practical problems is demonstrated through example problems. The effectiveness of the commonly-used insulating materials in reducing frost heave is evaluated. The differential frost heave caused by the snow cover on road shoulders is estimated, as a function of the snow thickness. The effect of the ground water table on frost heave is also studied.
Sirivivatnanon, V, Trinh Cao, H & Nelson, P 1970, 'Mechanical and durability properties of high volume fly ash concrete', American Concrete Institute, ACI Special Publication, pp. 967-984.
View description>>
In this study, structural grade concretes with characteristic strength of 20 to 45 MPa were made with general purpose portland cement (ASTM Type I} and with fly ash blends. High volumes of fly ash (ASTM Class F) in the range of 40-50 percent by weight of total binder were used. It was found that for an equivalent 28-day strength and slump, structural concretes containing high volume fly ash can provide a number of advantages over plain cement concretes including lower drying shrinkage and better creep characteristics. Similar flexural strength and elastic modulus were observed between equivalent plain cement and high volume fly ash concretes. Experience obtained in field trials of high volume fly ash concretes showed that they can be mixed, transported, placed and finished using conventional concreting equipment and technique. Laboratory studies of blended cements containing high percentages of fly ash as cement replacement material indicated that steel passivation characteristics improved with age of hydration and there was no negative effect caused by pozzolanic reaction. Electrochemical data using polarization resistance techniques on paste samples immersed in 0.5 M NaCl solution are given. The results indicated that even with limited initial curing of 7 days, the corrosion rates of steel in 40 wt% fly ash blend were very similar to that of plain cement at high water-to-binder ratio (>0.6) and were lower than that of plain cement at low water-to-binder ratio ( <=0.6). Data obtained from mortar samples subjected to sulphate environments suggested that the use of blended cements with high fly ash replacement could be beneficial in the case where the pH of the environment was low such as that experienced by concrete structures in sewerage works.
Siriwardena, L & Hadgraft, R 1970, 'Regional flood frequency in Victoria', National Conference Publication - Institution of Engineers, Australia, pp. 247-252.
View description>>
This study shows the difficulty in incorporating regional skews in flood frequency analysis in Australia, as they are inconsistent, unstable and very subjective to elimination of low outliers, especially when estimated from short records. A regional procedure of flood estimation was also developed by regression of standardised 100-yr flood estimates against mean annual rainfall. Only 30% of stations yielded better estimates from the regional procedure compared to the at-site procedure of a fitted LP-III distribution.
van de Groenendaal, JG & Braun, RM 1970, 'Phase-plane analysis of phase-locked loops used for clock recovery', Proceedings of COMSIG '94 - 1994 South African Symposium on Communications and Signal Processing, COMSIG '94 - 1994 South African Symposium on Communications and Signal Processing, IEEE, pp. 99-104.
View/Download from: Publisher's site
View description>>
The transient analysis of phase-locked loops is not an easy analytical task. Although linearisation of these devices is common practice, the exact nature of the loop is not obtained. Using phase-plane techniques it is possible to determine both the transient and steady-state responses of phase-locked loops. In this paper we investigate the application of phase-plane techniques to a second-order phase-locked loop and to a more complex clock-recovery loop. A number of interesting results were obtained and are discussed.
Vucetic, B, Zhang, L & Oppermann, I 1970, 'Modelling and simulation of ICO satellite communication channels', National Conference Publication - Institution of Engineers, Australia, pp. 493-497.
View description>>
The channel models for Intermediate Circular Orbit (ICO) satellite links are developed for tripod mounted and hand-held receivers with a stationary and moving user in various propagation environments. The channel model is based on a linear combination of Rice, Rayleigh and log-normal faded signals to represent the signal variations over an area with constant environment characteristics while an M-state Markov chain is applied to model environment parameter variations. The model parameters are estimated from the experimental data and used to simulate signal amplitude variations. The simulated and experimental data are compared on the basis of probability density functions.
Zaman, S & Ball, JE 1970, 'Simulation of small events in an urban catchment', National Conference Publication - Institution of Engineers, Australia, pp. 353-358.
View description>>
In general, stormwater runoff from an urbanised catchment is the result of a complex interaction of processes which influence the generation of rainfall on both the pervious and impervious areas within the catchment. When the rainfall depth is small, however, the rainfall excess will be generated primarily on the impervious surfaces with a consequent reduction in the complexity of the interaction of the processes. To investigate the processes influencing the generation of rainfall excess and, hence, the development of stormwater runoff, a number of storm events with small rainfall depths were simulated on the Salt Pan Creek catchment. Presented herein are the results obtained from these simulations. Also presented is a discussion of the interaction between alternative processes occurring on impervious surfaces.
