Bajracharya, K & Vigneswaran, S 1990, 'Adsorption of cadmium and zinc in saturated soil columns: Mathematical models and experiments', Environmental Technology (United Kingdom), vol. 11, no. 1, pp. 9-24.
View/Download from: Publisher's site
View description>>
It vas found from experiments that adsorption of Cd and Zn in the dynamic system was higher than that in the static systea. Equilibrium Adsorption Model (EAM) and Two Site Adsorption Model (TSAM) have been validated with the observed concentration history curves of Cd and Zn. In most of the cases the EAM model with dynamic isotherm constants fitted the observed concentration history curves satisfactorily. In those where EAM did not fit well (using Dynamic isotherm constants), the TSAM predicted more accurately. The general conclusion is that for highly adsorbing solutes, EAM is a simple and quite satisfactory model for the prediction of concentration profiles both temporally and spatially. © 1990 Publications Division Selper Ltd.
Bajracharya, K & Vigneswaran, S 1990, 'Competitive adsorption of solutes in saturated soil columns: Mathematical model and experiments', Environmental Technology (United Kingdom), vol. 11, no. 1, pp. 25-32.
View/Download from: Publisher's site
View description>>
Results of competitive adsorption column experiments of Cadmiua (Cd) and Zinc (Zn) are discussed. A mathematical model termed as Competitive Dynamic Adsorption Model (CDAM) to predict the solute concentration in the multi‐solute system is presented. The CDAM is verified using concentration history curves of Cd and Zn obtained from saturated column experiments. © 1990 Taylor and Francis Group, LLC.
Ball, JE 1990, 'Unsteady flow model for urban drainage systems', Transactions of the Institution of Engineers, Australia. Civil engineering, vol. CE32, no. 2, pp. 66-74.
View description>>
A numerical model which uses the algorithm presented by Ball (1) and the results of an investigation into the relative importance of the terms in the full dynamic wave equation of motion presented by Ball (2) for the prediction of unsteady flow propagation within an urban drainage system is presented. Results obtained from the use of the proposed model and also from use of the EXTRAN block of SWMM (3) on sample hypothetical networks are presented. These results indicate a more stable and physically reasonable hydrograph is predicted by the proposed model than that obtained from EXTRAN. Finally, an application of the proposed model to the analysis of an existing drainage network is presented.
BIRD, TS 1990, 'ANALYSIS OF MUTUAL COUPLING IN FINITE ARRAYS OF DIFFERENT-SIZED RECTANGULAR WAVE-GUIDES', IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 38, no. 2, pp. 166-172.
View/Download from: Publisher's site
BIRD, TS 1990, 'BEHAVIOR OF MULTIPLE ELLIPTIC WAVE-GUIDES OPENING INTO A GROUND PLANE', IEE PROCEEDINGS-H MICROWAVES ANTENNAS AND PROPAGATION, vol. 137, no. 2, pp. 121-126.
View/Download from: Publisher's site
BIRD, TS & HAY, SG 1990, 'MISMATCH IN DIELECTRIC-LOADED RECTANGULAR WAVE-GUIDE ANTENNA', ELECTRONICS LETTERS, vol. 26, no. 1, pp. 59-61.
View/Download from: Publisher's site
BIRD, TS & SPREY, MA 1990, 'SCAN LIMITATIONS OF SHAPED DUAL-OFFSET REFLECTOR ANTENNAS FOR MULTIPLE SATELLITE ACCESS', ELECTRONICS LETTERS, vol. 26, no. 4, pp. 228-230.
View/Download from: Publisher's site
Briers, M & Hirst, M 1990, 'The role of budgetary information in performance evaluation', Accounting, Organizations and Society, vol. 15, no. 4, pp. 373-398.
View/Download from: Publisher's site
View description>>
This paper provides a review of studies that focus on the use of budgetary information in performance evaluation. Our survey shows that studies have recognized that this information is used in a variety of ways. In addition, various psychological and behavioral effects of alternative uses as well as factors that give rise to a particular use have been identified. Notwithstanding this breadth of analysis, a critical review of the literature shows that in recent years theoretical development has been piece meal, and there are instance of selective referencing and an uncritical acceptance of theory statements in related literature. More generally, theoretical development has taken a secondary role to an emphasis on statistical analysis. Further, recent empirical studies tend to be method-driven in their selection of relevant phenomena and, in addition, include several characteristics that cause an uncoupling of the connection between theory statements and empirical test. The present review interprets these limitations as providing opportunities for future research. © 1990.
CANDY, JV, ZIOLKOWSKI, RW & LEWIS, DK 1990, 'TRANSIENT WAVE ESTIMATION - A MULTICHANNEL DECONVOLUTION APPLICATION', JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 88, no. 5, pp. 2235-2247.
View/Download from: Publisher's site
CANDY, JV, ZIOLKOWSKI, RW & LEWIS, DK 1990, 'TRANSIENT WAVES - RECONSTRUCTION AND PROCESSING', JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, vol. 88, no. 5, pp. 2248-2258.
View/Download from: Publisher's site
Chang, J & Vigneswaran, S 1990, 'Ionic strength in deep bed filtration', Water Research, vol. 24, no. 11, pp. 1425-1430.
View description>>
The removal efficiency of particles in deep bed filtration depends on both transport and attachment mechanisms of particles. The particle attachment mechanisms depend mainly on chemical characteristics of aqueous phase, suspended particles and filter media. In this study, two different suspensions were used to study the effect of ionic strength on the particle removal efficiency. The ionic strength of suspension was varied by adding a known amount of sodium chloride. The removal efficiencies were related to ionic strength and zeta potential. The clean filter bed efficiency and removal efficiency during the ripening period for various strengths were quantitatively related to the two model coefficients appearing in the O'Melia-Ali model. These model coefficients represent the filter medium-particle and particle-particle attachments. This type of quantification of the effect of ionic strength in terms of filter efficiency is very useful in filter design and operation control.
Colagiuri, S, Caden, MJ, Shannon, AG & Gallagher, P 1990, 'An integrated computerized system for diabetes management', Journal of Clinical Computing, vol. 18, no. 4, pp. 87-91.
DAJANI, I, DIPESO, G, MORSE, EC & ZIOLKOWSKI, R 1990, 'GAUSSIAN-BEAM PROPAGATION IN A WEAKLY NONLINEAR MEDIUM - A GEOMETRICAL-OPTICS APPROACH', PHYSICAL REVIEW A, vol. 41, no. 7, pp. 3740-3745.
View/Download from: Publisher's site
ESSELLE, KP & STUCHLY, SS 1990, 'PULSE-RECEIVING CHARACTERISTICS OF RESISTIVELY LOADED DIPOLE ANTENNAS', IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 38, no. 10, pp. 1677-1683.
View/Download from: Publisher's site
ESSELLE, KP & STUCHLY, SS 1990, 'RESISTIVELY LOADED LOOP AS A PULSE-RECEIVING ANTENNA', IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 38, no. 7, pp. 1123-1126.
View/Download from: Publisher's site
Eze, OC & Loganathan, P 1990, 'Effects of pH on phosphate sorption of some paleudults of Southern Nigeria', Soil Science, vol. 150, no. 3, pp. 613-621.
View/Download from: Publisher's site
View description>>
The effect of pH on phosphate sorption by soil samples from two coarse-textured pedons of typic Paleudults in the perhumid tropical zone of Nigeria was studied by equilibrating air-dried soil samples adjusted to pH 3.5–6.5 for 48 h with 10 ppm P and 60 ppm P solutions at two concentrations of CaCl2 and NaCl. Phosphate sorption was generally unaffected by pH at low P additions at the two concentrations of the salts, whereas at high P additions sorption generally decreased with increase in soil pH, except in the presence of the high concentration of CaCl2 (10−2 M) where sorption decreased up to pH 5.0–5.5; beyond this pH range it increased. In both 10−2 M CaCl2 and 3 × 10−2 M NaCl systems, phosphate sorption decreased by 19–89% as a result of dithionite-citrate-bicarbonate (DCB) treatment. The effects of pH on phosphate sorption by treated samples were similar to those by untreated samples. Phosphate sorption increased with increase in depth, probably due to the increase in oxalate and dithionite-citrate-bi-carbonate extractable Fe and Al and the decrease in organic matter content down the pedons. Phosphate sorption by samples from the B horizon increased with increase in period of incubation with lime, whereas in the samples of Ap horizons no consistent trend was obtained. © 1990 Williams and Wilkins.
Gardner, JF, Srinivasan, K & Waldron, K 1990, 'A Solution For The Force Distribution Problem In Redundantly Actuated Closed Kinematic Chains', Journal Of Dynamic Systems Measurement And Control-transactions Of The ASME, vol. 112, no. 3, pp. 523-526.
View/Download from: Publisher's site
View description>>
NA
Gardner, JF, Srinivasan, K & Waldron, K 1990, 'Closed-loop Trajectory Control Of Walking Machines', Robotica, vol. 8, pp. 13-22.
View/Download from: Publisher's site
View description>>
NA
Gowripalan, N, Cabrera, JG, Cusens, AR & Wainwright, PJ 1990, 'Effect of curing on durability', Concrete International, vol. 12, no. 2, pp. 47-54.
View description>>
The durability of concrete structures is greatly influenced by the curing of the concrete. Inadequate curing can result in a very weak and porous material near the surface of the concrete that is vulnerable to ingress of various harmful substances from the environment. A review is presented of the effects of methods and duration of curing on concrete properties with respect to permeability, porosity, and water absorption. Results obtained from mortar specimens that were cured using chemical membranes are discussed. A brief discussion on the current method of assessing the curing efficiency of chemical membranes is also presented.
Huang, M & Waldron, K 1990, 'Relationship Between Payload And Speed In Legged Locomotion Systems', IEEE Transactions On Robotics And Automation, vol. 6, no. 5, pp. 570-577.
View/Download from: Publisher's site
View description>>
NA
HUYNH, BP, COULMAN, CE & TURNER, TR 1990, 'SOME TURBULENCE CHARACTERISTICS OF CONVECTIVELY MIXED LAYERS OVER RUGGED AND HOMOGENEOUS TERRAIN', BOUNDARY-LAYER METEOROLOGY, vol. 51, no. 3, pp. 229-254.
View/Download from: Publisher's site
INDRARATNA, B 1990, 'DEVELOPMENT AND APPLICATIONS OF A SYNTHETIC MATERIAL TO SIMULATE SOFT SEDIMENTARY-ROCKS', GEOTECHNIQUE, vol. 40, no. 2, pp. 189-200.
View/Download from: Publisher's site
Indraratna, B & Kaiser, PK 1990, 'Analytical model for the design of grouted rock bolts', International Journal for Numerical and Analytical Methods in Geomechanics, vol. 14, no. 4, pp. 227-251.
View/Download from: Publisher's site
View description>>
An analytical model which represents the behaviour of a reinforced rock mass near a circular underground opening in a homogeneous, uniform stress field has been developed. The theory adopts the concepts of elastoplasticity and considers a proper interaction mechanism between the ground and the grouted (or friction) bolts. It highlights the influence of the bolt pattern on the extent of the yield zone and tunnel deformation. A dimensionless parameter is introduced as a design tool which relates the tunnel convergence to the bolt spacing for a given bolt length. This publication contains the derivation of the analytical model and an illustration of the effect of bolts on the stress and displacement field near an opening. Its application to tunnel design is discussed briefly. The verification of the theory by laboratory simulation and field measurements will be presented, in detail, in a future publication. Copyright © 1990 John Wiley & Sons, Ltd
Indraratna, B & Kaiser, PK 1990, 'Design for grouted rock bolts based on the convergence control method', International Journal of Rock Mechanics and Mining Sciences and, vol. 27, no. 4, pp. 269-281.
View/Download from: Publisher's site
View description>>
A design approach for the application of fully grouted bolts as a passive support system in underground openings is introduced in this paper. The analytical solution was developed based on elasto-plastic concepts and was verified by laboratory simulations with physical models. The application of the theory to one case history and a comparison with an empirical design method (RMR) are presented. Computational examples and general design guides are provided to facilitate the use of the proposed method in practice. © 1990.
Kougias, F & Schulte, J 1990, 'Simulating the immune response to the HIV-1 virus with cellular automata', Journal of Statistical Physics, vol. 60, no. 1/2, pp. 263-273.
View/Download from: Publisher's site
Kumar, V & Waldron, K 1990, 'Force Distribution In Walking Vehicles', Journal Of Mechanical Design, vol. 112, no. 1, pp. 90-99.
View/Download from: Publisher's site
View description>>
NA
MADSEN, NK & ZIOLKOWSKI, RW 1990, 'A 3-DIMENSIONAL MODIFIED FINITE VOLUME TECHNIQUE FOR MAXWELL EQUATIONS', ELECTROMAGNETICS, vol. 10, no. 1-2, pp. 147-161.
View/Download from: Publisher's site
Mahinthakumar, G & Vigneswaran, S 1990, 'Solute Transport Through Saturated Soils - A Study Of The Physical Nonequilibrium Model', Water Air And Soil Pollution, vol. 51, no. 1-2, pp. 161-180.
View/Download from: Publisher's site
View description>>
NA
Nanua, P, Waldron, K & Murthy, V 1990, 'Direct Kinematic Solution Of A Stewart Platform', IEEE Transactions On Robotics And Automation, vol. 6, no. 4, pp. 438-444.
View/Download from: Publisher's site
View description>>
NA
Pugh, D, Ribble, E, Vohnout, V, Bihari, T, Walliser, T, Patterson, M & Waldron, K 1990, 'Technical Description Of The Adaptive Suspension Vehicle', International Journal Of Robotics Research, vol. 9, no. 2, pp. 24-42.
View/Download from: Publisher's site
View description>>
NA
Reuben, AJ & Shannon, AG 1990, 'Some problems in the mathematical modelling of erythrocyte sedimentation', Mathematical Medicine and Biology, vol. 7, no. 3, pp. 145-156.
View/Download from: Publisher's site
View description>>
The rate at which red blood cells fall in vitro is used as a common clinical test, amongst others, for a number of pathological conditions. The use of this test is cast into doubt when one finds flaws in the underlying models and confusion over fundamental issues such as the aggregation of the red blood cells. Both of these deficiencies are evident in an otherwise innovative publication by Huang et al. (1971). In examining the mathematics of this relatively unknown study, it is found that the Huang model resembles certain moving-boundary problems. The consequences of this observation are discussed. © 1990 Oxford University Press.
REUBEN, AJ & SHANNON, AG 1990, 'SOME PROBLEMS IN THE MATHEMATICAL-MODELING OF ERYTHROCYTE SEDIMENTATION', IMA JOURNAL OF MATHEMATICS APPLIED IN MEDICINE AND BIOLOGY, vol. 7, no. 3, pp. 145-156.
SHAARAWI, AM, BESIERIS, IM & ZIOLKOWSKI, RW 1990, 'A NOVEL-APPROACH TO THE SYNTHESIS OF NONDISPERSIVE WAVE PACKET SOLUTIONS TO THE KLEIN-GORDON AND DIRAC EQUATIONS', JOURNAL OF MATHEMATICAL PHYSICS, vol. 31, no. 10, pp. 2511-2519.
View/Download from: Publisher's site
SHANNON, AG, COLAGIURI, S & MILLER, JJ 1990, 'COMPARISON OF GLYCEMIC CONTROL WITH HUMAN AND PORCINE INSULINS - A META-ANALYSIS', MEDICAL JOURNAL OF AUSTRALIA, vol. 152, no. 1, pp. 49-49.
View/Download from: Publisher's site
VASILAKOS, AV 1990, 'ON THE BEHAVIOR OF LEARNING ALGORITHMS IN A CHANGING ENVIRONMENT WITH APPLICATION TO DATA NETWORK ROUTING PROBLEM', KYBERNETIKA, vol. 26, no. 4, pp. 296-307.
VASILAKOS, AV 1990, 'ON THE BEHAVIOR OF LEARNING ALGORITHMS IN A CHANGING ENVIRONMENT WITH APPLICATION TO DATA NETWORK ROUTING PROBLEM - MODELS, CONVERGENCE ANALYSIS AND OPTIMALITY', COMPUTER STANDARDS & INTERFACES, vol. 11, no. 1, pp. 29-39.
View/Download from: Publisher's site
Veitch, D & Glendinning, P 1990, 'Explicit renormalisation in piecewise linear bimodal maps', Physica D: Nonlinear Phenomena, vol. 44, pp. 149-167.
Veitch, D, Asten, MW & Van Leeuwen, EH 1990, 'Electrical and magnetometric fields in a layered earth containing buried electrodes', Geophysics, vol. 55, pp. 1605-1612.
Vigneswaran, S & Joshi, D 1990, 'Laboratory development of a small-scale iron removal plant for rural water supply', Aqua, vol. 39, no. 5, pp. 300-308.
View description>>
This paper outlines the construction and performance of a simple iron and manganese removal plant, suitable for small community water supply in rural areas, where groundwater is extensively used for drinking and other domestic purposes. The unit consists of a contact filter to oxidize iron and manganese and a matrix filter to remove these pollutants. This paper presents a design approach for a new type of fixed-bed filter, known as matrix filter, for the removal of suspended solids, iron, manganese and coliform. -Authors
Vigneswaran, S, Jing Song Chang & Janssens, JG 1990, 'Experimental investigation of size distribution of suspended particles in granular bed filtration', Water Research, vol. 24, no. 7, pp. 927-930.
View/Download from: Publisher's site
View description>>
Laboratory-scale experimental studies were conducted to show the effect of size distribution of particles in granular bed filtration. The results showed that the investigation of granular bed filtration based merely on the mean size is inadequate as particles of different size have different removal efficiencies. This study also showed that there is an improvement in fine particles removal efficiency when they are present with particles in polydispersed suspension. © 1990.
VOINOV, AA & AKHREMENKOV, AA 1990, 'SIMULATION MODELING SYSTEM FOR AQUATIC BODIES', ECOLOGICAL MODELLING, vol. 52, no. 3-4, pp. 181-205.
View/Download from: Publisher's site
Watterson, PA 1990, 'Magnetic-field Penetration Into Thin Disks', Archiv Fur Elektrotechnik, vol. 73, no. 5, pp. 353-363.
View/Download from: Publisher's site
View description>>
NA
Ying, M 1990, 'On Probabilistic Normed Spaces Under τT,L', International Journal of Mathematics and Mathematical Sciences, vol. 13, no. 4, pp. 731-736.
View/Download from: Publisher's site
View description>>
We introduce the operation [formula omitted] copulative with τT,L to define PN space under τT,L and establish some basic properties of probabilistic seminorms and norms under τT,L. Finally, we discuss so-called L-simple spaces. © 1990, Hindawi Publishing Corporation. All rights reserved.
Ying, M 1990, 'The Alternativity Measures Of Fuzzy-Sets', Fuzzy Sets and Systems, vol. 37, no. 1, pp. 105-110.
View/Download from: Publisher's site
View description>>
NA
ZHANG, N & HAYAMA, S 1990, 'IDENTIFICATION OF STRUCTURAL SYSTEM PARAMETERS FROM TIME DOMAIN DATA - (IDENTIFICATION OF GLOBAL MODAL PARAMETERS OF A STRUCTURAL SYSTEM BY THE IMPROVED STATE VARIABLE METHOD)', JSME INTERNATIONAL JOURNAL SERIES III-VIBRATION CONTROL ENGINEERING ENGINEERING FOR INDUSTRY, vol. 33, no. 2, pp. 168-175.
View/Download from: Publisher's site
ZHOU, JL & BANKS, CJ 1990, 'FRACTIONATION OF HUMIC-ACID COMPONENTS BY ION-EXCHANGE CHROMATOGRAPHY', ENVIRONMENTAL TECHNOLOGY, vol. 11, no. 12, pp. 1147-1152.
View/Download from: Publisher's site
ZIOLKOWSKI, RW & LEWIS, DK 1990, 'VERIFICATION OF THE LOCALIZED-WAVE TRANSMISSION EFFECT', JOURNAL OF APPLIED PHYSICS, vol. 68, no. 12, pp. 6083-6086.
View/Download from: Publisher's site
BEINAT, P & TSUI, E 1990, 'EXTENDING COLOSSUS TO COVER COMPENSATION FOR FUTURE ECONOMIC-LOSS', AI 90, 4TH AUSTRALIAN JOINT CONF ON ARTIFICIAL INTELLIGENCE - EVERDAY AI : NEW TOOLS FOR SOCIETY ( AI-90 ), WORLD SCIENTIFIC PUBL CO PTE LTD, PERTH, AUSTRALIA, pp. 477-489.
Esselle, KP & Stuchly, SS 1990, 'A new broadband antenna for transient electromagnetic field measurements', IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), pp. 1584-1587.
View description>>
A novel broadband antenna based on the resistively loaded V dipole is presented. For a given sensitivity and termination impedance, this antenna provides a broader bandwidth compared with the Wu-King dipole. A 30-cm monopole configuration with a 500-Ω commercially available probe as the termination is estimated to have a bandwidth of 20-10 GHz and sensitivity of 10.5 × 10-3 V/(Vm-1).This antenna can be used to measure electromagnetic pulses and transients with subnanosecond rise times. It can also be used as the receiving antenna in time-domain scattering edges.
Esselle, KP & Stuchly, SS 1990, 'An electrically-large antenna for transient electromagnetic field measurements', CPEM Digest (Conference on Precision Electromagnetic Measurements), pp. 192-193.
View description>>
An electrically large antenna for the measurement of broadband electromagnetic pulses and transients is described. Numerical results obtained from theoretical analyses in both the time and frequency domains are presented. They indicate that the antenna can be used to measure electromagnetic pulses and transients with subnanosecond rise times (bandwidth up to 10 GHz) and has much better frequency- and time-domain receiving characteristics than an equally sensitive Wu-King monopole.
Hong, G & Collings, N 1990, 'Application of self-tuning control', SAE Technical Papers.
View/Download from: Publisher's site
View description>>
Two kinds of self-tuning control algorithms have been applied using a novel smoke sensor as part of a diesel smoke control system. Firstly, pole assignment self-tuning control was used to achieve the desired engine speed response, with a smoke predictor used to solve the problems caused by the time delay between the fuel input and smoke output; secondly, a Pl self-tuning controller was used to solve the problem caused by the variation of the coefficients in the transfer functions with engine conditions. The experimental results and the problems and the ideas for future work are discussed. Copyright © 1990 Society of Automotive Engineers, Inc.
Horwitz, R, Courtenay, TD & Braun, RM 1990, 'The development of novel modem structures to enhance the throughput of dial up telephone lines', IEEE 1990 South African Symposium on Communications and Signal Processing, COMSIG 1990 - Proceedings, pp. 95-99.
View/Download from: Publisher's site
View description>>
© 1990 IEEE. A popular approach to designing high-speed modems for use on voice-grade telephone channels is to use a high order modulation scheme combined with a digital architecture. This paper describes the development of a modem structure which uses the DSP56001 signal processor to implement 49 quadrature partial response signalling (49 QPRS). The choice of 49 QPRS is justified by its high spectral efficiency and reasonable error rate performance. This system is being developed for two applications, which are described in the paper.
Huang, XJ & Chen, HB 1990, 'Born migration and its fast implementation in the wavenumber-time domain', 1990 SEG Annual Meeting, pp. 1136-1139.
View description>>
© 1990 Society of Exploration Geophysicists. All rights reserved. A new method for wave equation migration is presented in this paper. This migration method, named Born Migration, is formulated by solving the boundary-value problem of the wave equation in an integral closed-form and applying the Born approximation for the Green's function in the inhomogeneous media. The major features of Born migration are: 1. it has no limitation in dip angle; 2. it can accommodate gentle vertical and lateral velocity variations; and 3. it can be implemented by using fast Fourier transformation. It is believed that this technique is especially suitable for migration in 3D seismic survey application.
Lister, R 1990, 'Toward context dependent classification of infra-red spectra by energy minimization', IJCNN. International Joint Conference on Neural Networks, pp. 1-6.
View description>>
An architecture for reimplementing an existing expert system is described. The original application, called GOLD, identifies minerals in rock samples, using infrared spectral data, and was developed in the Prospector formalism. The development of GOLD's knowledge base became cumbersome when it was necessary to describe how the spectrum of one mineral is affected by the presence of another mineral in the same sample. This is due to Prospector's one-way flow of information in the inference net, from data to goals. Any form of unidirectional knowledge representation would suffer the same problem. A bidirectional energy minimization network is a more suitable form of knowledge representation. This is illustrated on a simplified version of the spectral interpretation problem.
MCLAUGHLAN, RG & STUETZ, RM 1990, 'TUBEWELL FOULING AT A SALINITY INTERCEPTION SCHEME, WAKOOL, NSW, AUSTRALIA', WATER WELLS, INTERNATIONAL CONF ON GROUNDWATER ENGINEERING, E & FN SPON, CRANFIELD INST TECHNOL, CRANFIELD, ENGLAND, pp. 47-58.
View/Download from: Publisher's site
Murthy, V & Waldron, KJ 1990, 'Parallel dual of the Stanford arm', American Society of Mechanical Engineers, Design Engineering Division (Publication) DE, pp. 141-145.
View description>>
The Stanford arm is a robot of well known geometry which is characterized by having eight solutions to the inverse position kinematics problem. Its dual, under the velocity motor/wrench symmetry, is here shown to also have eight solutions to its direct position kinematics problem. Under the duality, the direct kinematics problem of a parallel mechanism corresponds to the inverse kinematics problem of a serial mechanism. Although there is no general proof that the number of solutions in the position kinematics problems of such dual pairs is the same, the example presented here, together with solutions to the corresponding problems of several other dual pairs some which were presented earlier forms a context within which the general relationship at the position level between pairs of mechanisms which are dual to each other can be addressed. The Stanford arm and its parallel dual forms the first such pair containing a prismatic joint in the serial chain to be studied.
Murthy, V & Waldron, KJ 1990, 'Position kinematics of the generalized lobster arm and its series-parallel dual', American Society of Mechanical Engineers, Design Engineering Division (Publication) DE, pp. 253-261.
View description>>
The generalized lobster arm is a six revolute open kinematic chain with 3 consecutive intersecting pairs of axes. A new solution of the inverse position kinematics problem of this arm which takes advantage of its specific geometry is presented. A comparison is made with the direct position kinematics problem of the series-parallel dual mechanism. The equations governing the two problems show strong similarity and can each be reduced to a sixteenth degree univariate polynomial equation. The dual series-parallel mechanism is the one that exhibits, with the Lobster arm, the symmetry that exists between the wrench and the velocity motor. Although the results presented here have intrinsic interest, a more generally important feature is the relationship between the solutions to the inverse kinematics of the serial mechanism and the direct kinematics of the parallel mechanism. Although the series-parallel duality has not been shown to hold in the position domain, except in terms of very general characteristics, it is shown here that the two solutions are of the same degree and have other features in common.
Poulton, GT, Bird, TS, Hay, SG & Choi, YK 1990, 'Rigorous design of an antenna for AUSSAT-B', IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), pp. 1900-1903.
View description>>
The prototype antenna designed, constructed, and tested for the AUSSAT-B western Australia regional beam has operated within specifications in all regards. More importantly, the overall design approach of using highly accurate software tools to obtain a successful first-time design has been vindicated. The antenna, comprising an array of horns illuminating an offset paraboloidal reflector, has a beamforming network (BFN) to provide correct power distribution and phasing to the feed elements. The antenna geometry is defined, showing the specified racetrack projected aperture. The other main constraint imposed on the antenna design was a volumetric limit on the feed and beamforming network. The far-field pattern obtained at 12.5 GHz is shown, with the beam pattern computed from measured BFN excitations superimposed. It is shown that the correspondence between theory and experiment is excellent.
Seeman, P, Niznik, HB, Nguyen, T, Tirpak, A, Jarvie, KR, Israel, Y & O'Dowd, BF 1990, 'Neuroleptic/dopamine receptors: search for new g-linked receptors', European Journal of Pharmacology, pp. 106-107.
View/Download from: Publisher's site
Stewart, BW & Catchpoole, D 1990, 'Structural analysis of replicating DNA following exposure to cytotoxic drugs: implications for current models of DNA synthesis in mammalian cells', Anti-Cancer Drug Design, pp. 141-147.
View description>>
The polynucleotide length of single-stranded regions in double-stranded DNA may be determined by caffeine gradient elution from benzoylated DEAE-cellulose. On the basis of this principle, analysis has been made of sheared, deproteinized DNA isolated from synchronized lymphoblastoid cells. Two classes of single-stranded regions were detected. A minor fraction of replicating DNA contained single-stranded regions of 200 nucleotides, whilst the major structural discontinuity involved single-stranded regions of 1-4 kilobases. Newly incorporated [3H]thymidine was principally associated with the latter. Using a 'pulse-chase' protocol, the effect of certain cytotoxic drugs (and related compounds) on the proportion of replicating DNA exhibiting single-stranded character was assessed. The effects were variable. The proportion was increased by hydroxyurea and 3-aminobenzamide, but decreased by inhibitors of DNA polymerase and, to a greater extent, by inhibitors of topoisomerase. Caffeine gradient elution associated drug-induced changes with the radiolabelling of long single-stranded regions. The results are consistent with models of DNA replication involving DNA polymerization remote from replicating forks.
Vasilakos, AV & Papadimitriou, GI 1990, 'Ergodic discretized estimator learning automata with high accuracy and high adaptation rate for nonstationary environments', pp. 245-253.
View description>>
A novel ergodic discretized learning automaton which is epsilon-optimal is introduced. It utilizes a novel estimator learning algorithm which is based on the recent history of the environmental responses and is able to operate in nonstationary stochastic environments. The proposed automaton achieves significantly higher performance than the classical reward-penalty ergodic schemes. Extensive simulation results indicate the superiority of the proposed scheme. Furthermore, it is proved that it is epsilon-optimal in every stochastic environment.
Vasilakos, AV, Moschonas, CA & Paximadis, CT 1990, 'Adaptive window flow control and learning algorithms for adaptive routing in data networks', pp. 265-266.
View description>>
We present a new adaptive flow control algorithm together with learning routing algorithms. The key performance measure in both algorithms is packet delay. Window adjustment and route selection are based on delay measurements. Simulation results have shown the superiority of the new scheme over existing algorithms.
Vasilakos, AV, Moschonas, CA & Paximadis, CT 1990, 'Adaptive window flow control and learning algorithms for adaptive routing in data networks', pp. 265-266.
View description>>
We present a new adaptive flow control algorithm together with learning routing algorithms. The key performance measure in both algorithms is packet delay. Window adjustment and route selection are based on delay measurements. Simulation results have shown the superiority of the new scheme over existing algorithms.
WAINWRIGHT, PJ, CABRERA, JG & GOWRIPALAN, N 1990, 'ASSESSMENT OF THE EFFICIENCY OF CHEMICAL MEMBRANES TO CURE CONCRETE', PROTECTION OF CONCRETE, INTERNATIONAL CONF ON PROTECTION OF CONCRETE, E & FN SPON, UNIV DUNDEE, DUNDEE, SCOTLAND, pp. 907-920.
Waldron, KJ 1990, 'Solution rectification in three position motion generation synthesis', American Society of Mechanical Engineers, Design Engineering Division (Publication) DE, pp. 301-306.
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.
Zhou, W 1990, 'Fault tolerant computing: An improved recursive algorithm', Proceedings of the 5th Distributed Memory Computing Conference, DMCC 1990, pp. 851-856.
View/Download from: Publisher's site
View description>>
©1990 IEEE. In this paper, an improved recursive algorithm for fault tolerant computing is described. The original algorithm is presented by P. Agrawal. The improved algorithm uses majority voting to achieve more believable results than that of the original algorithm. Both space and time redundancy are employed dynamically in the algorithm. The algorithm is also extended to a general form. By defining different parameters, the algorithm will suit different system situations. The improved algorithm also has the original algorithm as one of its special cases. The performance of the improved algorithm is compared with the original algorithm by simulation. The results show that the improved algorithm is suitable for many circumstances.
Zhou, W & Molinari, B 1990, 'A model of execution time estimating for RPC-oriented programs', Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), pp. 376-384.
View/Download from: Publisher's site
View description>>
© Springer-Verlag Berlin Heidelberg 1990. This paper describes an execution time estimating model for programs which use Remote Procedure Calls (RPCs) as the tool for distributed computing. At first a general model with no closed-form solution is developed and a nondeterministic algorithm for its solution is given. Then the closed-form solution for a special case of the general model is derived. After using some approximate methods, the lower and upper bounds of the general form solution are described. The last section of this paper presents two examples of the application of the model.