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Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Voluntary Environmental Disclosure By Australian Listed Mineral Mining Companies : An Application Of Stakeholder Theory, Y. B. Hutomo
Voluntary Environmental Disclosure By Australian Listed Mineral Mining Companies : An Application Of Stakeholder Theory, Y. B. Hutomo
Theses: Doctorates and Masters
The purpose of this study was to examine the extent of voluntary environmental disclosure in relation to firm-specific characteristics of listed mineral mining firms within the stakeholder theory framework developed by Ullmann (1985). Three indices, word index, unweighted index and weighted index, were applied to measure the extent of total environmental disclosure and categories of total disclosure, which were environmental policy and strategy, public recognition of environmental activities, prevention or repair of environmental damage and environmental liabilities. A sample of 104 mineral firms was selected from the Australian Graduate . School of Management Annual Report Microfiche File for 1993. The• …
Calibration Of A Conceptual Rainfall-Runoff Model Using Simulated Annealing, Neil R. Sumner
Calibration Of A Conceptual Rainfall-Runoff Model Using Simulated Annealing, Neil R. Sumner
Theses: Doctorates and Masters
Simulated annealing (Kirkpatrick et al, 1983) is used to estimate the parameters of a mathematical model that predicts the water yield from a catchment. The calibration problem involves finding the global minimum of a multivariate function that has many extraneous local minima, a situation in which conventional optimisation methods are ineffective. The objective function which quantifies discrepancies between the computed and observed streamflows must be carefully selected to satisfy the least square assumptions. Several published simulated annealing algorithms have been implemented, tested and evaluated using standard test functions. Appropriate cooling schedules are found for each algorithm and test function investigated. …
A Proposal For A Development Platform For Microcontroller-Based Devices, Michael L. Wetton
A Proposal For A Development Platform For Microcontroller-Based Devices, Michael L. Wetton
Theses: Doctorates and Masters
This thesis is concerned with designing, implementing and testing a miniaturised temperature data logging device. Investigations demonstrated that a microcontroller could provide a low-cost single-chip solution to this problem and after a detailed review of 8-bit microcontrollers, the MC68HCll was chosen for this task. This document also includes discussion on an environment that was developed for creating and testing MC68HC11 software and the use of Motorola's evaluation boards. To ensure that the device was designed to software engineering standards an investigation into software engineering analysis techniques took place. This resulted in the Jackson Structured Programming (JSP) methodology being adapted to …
Some Issues In The Sliding Mode Control Of Rigid Robotic Manipulators, Sanjay Rao
Some Issues In The Sliding Mode Control Of Rigid Robotic Manipulators, Sanjay Rao
Theses: Doctorates and Masters
This thesis investigates the problem of robust adaptive sliding mode control for nonlinear rigid robotic manipulators. A number of robustness and convergence results are presented for sliding mode control of robotic manipulators with bounded unknown disturbances, nonlinearities, dynamical couplings and parameter uncertainties. The highlights of the research work are summarized below : • A robust adaptive tracking control for rigid robotic manipulators is proposed. In this scheme, the parameters of the upper bound of system uncertainty are adaptively estimated. The controller estimates are then used as controller parameters to eliminate the effects of system uncertainty and guarantee asymptotic error convergence. …
On The Relationship Between A Graph And The Cycle Graph Of Its Complement, Christian P. Lopez
On The Relationship Between A Graph And The Cycle Graph Of Its Complement, Christian P. Lopez
Theses: Doctorates and Masters
From an arbitrary graph G, another graph called the cycle graph of G and denoted by C(G) can be derived. The cycle graph C(G) of G has as its vertices the chordless cycles of G and two vertices in C(G) are adjacent if and only if the corresponding chordless cycles have at least one edge in common.
Modelling And Risk Analysis Of The Western Rock Lobster (Panulirus Cygnus) Fishery Of Western Australia, C. S. Yap
Theses: Doctorates and Masters
The predictive power for short-term forecasting of selected biomass dynamic models was examined using the standardised catch and effort data from the 1944/45 to 1990/91 season of the western rock lobster. Risk analysis of the fishery based on the predicted fishing efforts with the Deriso-Schnute delay-difference model indicates a high probability of recruitment failure. Some hypothetical management strategies of reducing fishing effort were evaluated by taking into consideration the total catch and biological risk to the fishery.