Publications

Hadgraft, RG & Volker, RE 1981, A model for predicting aquifer recharge from rainfall and river flow..
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Groundwater management programs frequently require data on the response of the aquifer to its various inputs and outputs. A numerical model has been developed to assist in the assessment of recharge quantities. The model is designed to be capable of representing the processes of rainfall and river recharge, irrigation extraction and leakage to the sea.-from Authors

Chuang, JC, Strong, RT & Waldron, KJ 1981, 'Implementation of Solution Rectification Techniques in an Interactive Linkage Synthesis Program', Journal of Mechanical Design, vol. 103, no. 3, pp. 657-664.
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The numerical and analytical problems encountered in the implementation of the theory developed by Strong and Waldron in an interactive graphic linkage synthesis program are discussed. The resulting program, called RECSYN, is more effective than earlier programs since the interactive experimentation capability no longer is needed to eliminate defective solutions but can be turned to other uses.

Cohen, GL & Shannon, AG 1981, 'John Ward's method for the calculation of Pi', Historia Mathematica, vol. 8, no. 2, pp. 133-144.
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What may be the last attempt to use geometric methods to calculate pi is found in a textbook published in England in 1707. The underlying algebraic and numerical methods are analyzed in this paper. © 1981.

Davis, HA, Gass, GC, Eager, D & Bassett, J 1981, 'Oxygen deficit during incremental exercise', European Journal of Applied Physiology and Occupational Physiology, vol. 47, no. 2, pp. 133-140.
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GASS, GC, CAMP, EM, DAVIS, HA, EAGER, D & GROUT, L 1981, 'The effects of prolonged exercise on spinally injured subjects', Medicine & Science in Sports & Exercise, vol. 13, no. 5, pp. 277???283-277???283.
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Hadgraft, RG, Volker, RE & Stark, KP 1981, 'unknown', In Proc 19th IAHR Congress New Delhi India Feb 1 7 1981, vol. 4, New Delhi, India, IAHR, 1981, Subject-C(b), Paper 11, pp. 82-183.
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Dynamic programming and simulation have been used to study a water resource system involving a major surface storage and an aquifer located downstream. The aquifer provides approximately 250,000 ML of irrigation water annually and natural recharge is augmented by artificial recharge using river water. Results are presented from various operating rules to determine the optimal strategy of releases from the surface storage. The operating rules depend on factors such as reservoir level, expected inflows and water demands. (A)

Hawryszkiewyc, IT 1981, 'DATA INDEPENDENCE IN DATA BASE DESIGN.', Australian Computer Journal, vol. 13, no. 4, pp. 114-121.
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Data independence is discussed in the context of program stability following a system change. Data independence is first defined and limitations imposed by the architectures of contemporary data base management systems and by the nature of data base changes outlined. Methods of overcoming the limitations are then discussed. These include both improvements in data base architecture and the use of standards in the design method. Emphasis is then placed on design methods, which improve data independence with contemporary data base management systems. One class of such methods is then outlined and their ability to improve program stability given a range of data base changes discussed.

Hawryszkiewycz, IT 1981, 'SOME TRENDS IN SYSTEM DESIGN METHODOLOGIES.', Australian Computer Journal, vol. 13, no. 1, pp. 13-23.
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Criteria for effective design methodologies are defined and some design methodologies compared against these criteria. The criteria call both for disciplined set of integrated design stages as well as for techniques that link program and data base design in a semantically consistent way thus reducing program complexity. Some shortfalls of existing methodologies in meeting these criteria are discussed and suggestions made for future development. Such suggestion includes calls for closer integration of program and data base design, and for the development of adaptable systems that allow designers to adapt the computer interface to the semantics of the user lever.

Hoang, DB & Goodwin, GC 1981, 'Lower bound on one shot error probability', Electronics Letters, vol. 17, no. 7, pp. 261-262.
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A number of upper and lower bounds have been described in the literature for the error performance of digital communication channels for the case of white output noise.1,2 In this letter a lower bound on the probability of error for one shot communication over a general linear channel with coloured noise is derived. © 1981, The Institution of Electrical Engineers. All rights reserved.

Kalam, MA 1981, 'MODIFIED RAYLEIGH-RITZ METHOD IN NONAXISYMMETRIC THERMOELASTIC ANALYSIS OF AN ORTHOTROPIC CYLINDER', Journal of Thermal Stresses, vol. 4, no. 1, pp. 31-38.
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Kumar, A & Waldron, KJ 1981, 'NUMERICAL PLOTTING OF SURFACES OF POSITIONING ACCURACY OF MANIPULATORS.', Mechanism & Machine Theory, vol. 16, no. 4.
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A mathematical model of the random positioning errors of mechanical manipulators is developed. This model is applied to a computer program to plot the generating curves of equal error surfaces for given manipulator geometries.

Kumar, A & Waldron, KJ 1981, 'The Workspaces of a Mechanical Manipulator', Journal of Mechanical Design, vol. 103, no. 3, pp. 665-672.
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A new theory and a resulting algorithm for tracing the bounding surfaces of mechanical manipulator workspaces is presented. The natures of the numerous singular configurations and means of accommodating them within the algorithm are also studied. In order to sort surfaces of interest from the large number of possible solutions, a numerically implementable labelling technique is also presented. The algorithm is applicable to all practicable manipulator configurations with three, or more, degrees of freedom.

MISTREE, F, HUGHES, OF & PHUOC, HB 1981, 'AN OPTIMIZATION METHOD FOR THE DESIGN OF LARGE, HIGHLY CONSTRAINED COMPLEX SYSTEMS', Engineering Optimization, vol. 5, no. 3, pp. 179-197.
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SAYERS, BM, RUGGIERO, C & FEUERLICHT, J 1981, 'STATISTICAL VARIABILITY OF BIOMEDICAL DATA .1. THE INFLUENCE OF SERIAL-CORRELATION ON MEAN-VALUE ESTIMATES', MEDICAL INFORMATICS, vol. 6, no. 1, pp. 1-11.

SAYERS, BM, RUGGIERO, C & FEUERLICHT, J 1981, 'STATISTICAL VARIABILITY OF BIOMEDICAL DATA .2. THE INFLUENCE OF SERIAL-CORRELATION ON POWER ESTIMATES, AND ON COMPARATIVE TESTING OF SAMPLES', MEDICAL INFORMATICS, vol. 6, no. 3, pp. 207-220.
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Sun, JWH & Waldron, KJ 1981, 'GRAPHICAL TRANSMISSION ANGLE CONTROL IN PLANAR LINKAGE SYNTHESIS.', Mechanism & Machine Theory, vol. 16, no. 4.
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It has long been recognized that in the design of 4-bar mechanisms, control of the transmission angle is one of the many important design criteria. Graphical techniques are presented which permit control of the maximum transmission angles (the transmission angle is here taken as the angle between the coupler and the normal to the driven crank) in the design positions for precision position linkage synthesis. This method does not directly control the maximum transmission angle magnitude throughout a motion cycle. It does permit elimination of all solutions whose transmission angle magnitude exceed nominated limits in the design positions. The constructions involve only circles and lines. Two numerical examples are given to illustrate and present a step-by-step graphical implementation of this new technique to a motion generation problem and a function generation problem.

VOINOV, AA & SVIREZHEV, YM 1981, 'STABILITY OF A SIMPLE FRESH-WATER ECOSYSTEM MODEL', ZHURNAL OBSHCHEI BIOLOGII, vol. 42, no. 6, pp. 936-940.

WHITE, CP, RICHARDSON, RH & POSEN, S 1981, 'THE SYNTHESIS OF DIHYDROXYLATED VITAMIN D METABOLITES BY HUMAN RENAL MITOCHONDRIA', The Journal of Clinical Endocrinology & Metabolism, vol. 53, no. 2, pp. 450-452.
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Bakoss, SL, Faulkes, KA & Pulmano, VA 1970, 'DETERMINATION OF CREEP AND SHRINKAGE CHARACTERISTICS FOR THE PREDICTION OF THE LONG-TERM DEFORMATIONS OF REINFORCED CONCRETE BEAMS.', National Conference Publication - Institution of Engineers, Australia, pp. 31-36.

Bone, DJ, Bachor, H-A & Sandeman, RJ 1970, 'Behaviour of a Dense Metal Vapour Resonantly Pumped by a CW Dye Laser', Second Australian Laser Conference.

Hadgraft, RG, Volker, RE & Stark, KP 1970, 'OPTIMAL CONJUNCTIVE OPERATION OF A SURFACE RESERVOIR AND AN AQUIFER.', Proceedings Congress International Association for Hydraulic Research, pp. 183-191.

Song, SM & Waldron, KJ 1970, 'THEORETICAL AND NUMERICAL IMPROVEMENTS TO AN INTERACTIVE LINKAGE DESIGN PROGRAM - RECSYN.', Proceedings - OSU Applied Mechanisms Conference (Oklahoma State University).