Publications

Ding, GK 2002, 'Multi-criteria analysis' in Langston, C & Lauge-Kristensen, R (eds), Strategic management of built facilities, Butterworth Heinemann, Oxford, pp. 196-207.

Boardman, G, Zhu, JG & Ha, QP 2002, 'Analysis of the steady state performance of doubly fed induction machines', Journal of Electrical and Electronics Engineering, Australia, vol. 22, no. 3, pp. 211-218.
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This paper discusses the steady state maximum and minimum torque outputs and the operation at unity power factor of the doubly fed twin stator induction machine and the doubly fed induction machine using equations with analytical solutions. Speeds above and below the natural or synchronous speed are discussed. The results of simulations, based on a laboratory machine comprising two nominally identical wound rotor induction machines, are presented. It is shown that the maximum torque for the doubly fed machine is independent of speed and for the doubly fed twin stator induction machine there are variable maxima and minima dependent on speed.

Brown, LD, Ray, AS, Thomas, PS & Guerbois, JP 2002, 'Thermal characteristics of Australian sedimentary opals', JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, vol. 68, no. 1, pp. 31-36.
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Naturally occurring opals from three different regions in Australia were studied for their thermal characteristics. All the opals showed initial expansion followed by contraction in thermomechanical analysis (TMA) although the temperature at which the change from expansion to contraction occurred depended on their provenance. Thermogravimetric analysis (TG) revealed different rates and temperatures of dehydration for these opals. A general correlation between the temperature at which there was a zero thermal expansion and that of the maximum rate of dehydration was observed. A dehydrationsintering mechanism is proposed with the effect of sintering being more pronounced following total dehydration.

Djajakesukma, SL, Samali, B, Li, J & Nguyen, H 2002, 'MODELLING AND IDENTIFICATION OF MR DAMPER FOR SEMIACTIVE STIFFNESS DAMPER', The Proceedings of the International Conference on Motion and Vibration Control, vol. 6.2, no. 0, pp. 1197-1202.
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Hao, H, Wu, C & Seah, CC 2002, 'Numerical Analysis of Blast-Induced Stress Waves in a Rock Mass with Anisotropic Continuum Damage Models Part 2: Stochastic Approach', Rock Mechanics and Rock Engineering, vol. 35, no. 2, pp. 95-108.
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Hao, H, Wu, C & Zhou, Y 2002, 'Numerical Analysis of Blast-Induced Stress Waves in a Rock Mass with Anisotropic Continuum Damage Models Part 1: Equivalent Material Property Approach', Rock Mechanics and Rock Engineering, vol. 35, no. 2, pp. 79-94.
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Li, J, Samali, B, Ye, L & Bakoss, S 2002, 'Behaviour of concrete beam–column connections reinforced with hybrid FRP sheet', Composite Structures, vol. 57, no. 1-4, pp. 357-365.
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Nicoletti, MDC & Brennan, J 2002, 'Learning spatial relations using an inductive logic programming system', Computing and Informatics, vol. 21, no. 1, pp. 17-36.
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The ability to learn spatial relations is a prerequisite for performing many relevant tasks such as those associated with motion, orientation, navigation, etc. This paper reports on using an Inductive Logic Programmming (ILP) system for learning function-free Horn-clause descriptions of spatial knowledge. Its main contribution, however, is to show that an existing relation between two reference systems - the speaker-relative and the absolute - can be automatically learned by an ILP system, given the proper background knowledge and positive examples.

Quang Ha, Santos, M, Quang Nguyen, Rye, D & Durrant-Whyte, H 2002, 'Robotic excavation in construction automation', IEEE Robotics & Automation Magazine, vol. 9, no. 1, pp. 20-28.
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An overview of the robotic excavation project at the Australian Center for Field Robotics at The University of Sydney is presented. The experimental machine, retrofitted from a commercial mini-excavator, and its instrumentation are described. Estimation and control strategies applied to the robotic excavator digger are briefly presented. Variable-structure-based techniques are employed to implement impedance control of excavator dynamics, and position/force control of the electrohydraulic systems for each working axis. This control takes into consideration uncertainties in modeling, friction, and bucket-soil interactions.

Wu, C & Hao, H 2002, 'Statistical analyses of RQD versus initial damage relationship of Singapore granite', Geotechnical Engineering, vol. 33, no. 3, pp. 103-112.
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This paper carries out statistical analysis of RQD, and correlates RQD with initial damage of the Bukit Timah granite in Singapore. RQDs are obtained by direct measurements of cores and boreholes and indirect measurements using P wave velocity on cores and seismic survey on the boreholes. Based on these data, it is found that RQDs measured both from the direct and indirect methods follow exponential distribution. The relationship of RQD and crack spacing is also derived. The initial damage of the rock mass, which models naturally existing geological discontinuities in a rock mass, is estimated using either the field-measured longitudinal and transverse elastic wave velocities or a damage tensor which is directly related to the discontinuities of the rock mass. By using Monte-Carlo simulation method, a relationship between the initial damage and RQD is derived.

Zhang, X 2002, 'Prediction of short fatigue crack propagation behaviour by characterization of both plasticity and roughness induced crack closures', International Journal of Fatigue, vol. 24, no. 5, pp. 529-536.
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Brennan, J & Martin, E 1970, 'Foundations for a Formalism of Nearness', Lecture Notes in Artificial Intelligence (Subseries of Lecture Notes in Computer Science), Springer Berlin Heidelberg, pp. 71-82.
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Reasoning about your spatial environment can be a challenging task, especially when you are a robot trying to rely solely on quantitative measures. With nearness being such a vague concept, a qualitative representation is an obvious choice offering a wider range of possible values. This paper introduces a qualitative representation for spatial proximity that accounts for absolute binary nearness relations. The formalism is based on the notion of perceived points, called sites, in a point based universe. Proximity concepts are determined by the parameters of distance between two sites and weight of each of those sites. These parameters were drawn from the concept of Generalised Voronoi Diagrams. Cognitively useful models and interpretations of our formalism are shown in both a navigation and a natural language context.

LI, J & SAMALI, B 1970, 'VARIABLE STRUCTURE CONTROL OF SEISMICALLY EXCITED STRUCTURE WITH SHAPE MEMORY ALLOY ACTUATORS', Applied Mechanics, Proceedings of the Third Australasian Congress on Applied Mechanics, WORLD SCIENTIFIC, Sydney, Australia, pp. 665-670.
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Li, J, Samali, B & Chapman, C 1970, 'Experimental realisation of active control of a five storey building model using SMA actuators', Advances in Mechanics of Structures and Materials, The 17th Australasian Conference on the Mechanics of Structures and Materials, A.A. Balkema Publishers, Gold Coast, Australia, pp. 699-704.

Li, JC, Samali, B & Ha, G 1970, 'FUZZY SLIDING MODE CONTROL OF A FIVE STOREY BENCHMARK MODEL EQUIPPED WITH ACTIVE MASS DRIVER (AMD)', The Proceedings of the International Conference on Motion and Vibration Control, International Conference on Motion and Vibration Control, Japan Society of Mechanical Engineers, Saitama Japan, pp. 172-177.
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Samali, B, Al Dawod, M & Li, JC 1970, 'PERFORMANCE OF AN ACTIVE MASS DRIVER SYSTEM ON A FIVE STOREY BENCHMARK MODEL', The Proceedings of the International Conference on Motion and Vibration Control, Japan Society of Mechanical Engineers, Japan, pp. 166-171.
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SAMALI, B, AL-DAWOD, M & LI, J 1970, 'PERFORMANCE OF A FIVE STOREY BENCHMARK MODEL USING AN ACTIVE MASS DRIVER AND A FUZZY CONTROLLER', Applied Mechanics, Proceedings of the Third Australasian Congress on Applied Mechanics, WORLD SCIENTIFIC, Gold Coast, Australia, pp. 647-652.
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Samali, B, Wu, Y & Li, J 1970, 'Torsional response of a base-isolated eccentric building model', Advances in Mechanics of Structures and Materials, The 17th Australasian Conference on the Mechanics of Structures and Materials, A.A. Balkema Publishers, Gold Coast, Australia, pp. 769-774.

Thomas, P & Stuart, BH 1970, 'Crystalline morphology of PEEK in PEEK-PTFE blends', 8th Symposium on Thermal Analysis and Calorimetry Abstracts Book, 8th Symposium on Thermal Analysis and Calorimetry, Barcelona.

WU, YM, SAMALI, B & LI, J 1970, 'EARTHQUAKE RESISTANT PERFORMANCE OF LAMINATED AND LEAD CORE RUBBER BEARINGS', Applied Mechanics, Proceedings of the Third Australasian Congress on Applied Mechanics, WORLD SCIENTIFIC, Sydney, Australia, pp. 659-664.
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