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Articles 1231 - 1260 of 1285
Full-Text Articles in Computer Sciences
Light Aircraft Management System, Evan Karjalainen
Light Aircraft Management System, Evan Karjalainen
Theses : Honours
This report details methods to construct a flight data logging system that can be used to manage student flight and aircraft maintenance records. These methods utilise GPS, embedded processors and associated software to depict the occurrence of landings, "Touch and Goes" and record aircraft total flight time. By manipulating these methods it was possible to produce a usable data-logging unit which facilitated the automation of flight maneuver recording. This datatogging unit was constructed from embedded components and interfaced with a user defined database. Perusal of the details within should provide the reader with a clear understanding of the tasks involved …
Implementing Flexible Software Techniques In A 4gl Environment, Stephen O'Connor
Implementing Flexible Software Techniques In A 4gl Environment, Stephen O'Connor
Theses : Honours
Today more IT professionals arc employed on the maintenance of existing software applications than are employed to develop new systems. Why is there such a need for this maintenance? Part of the problem is that developers have traditionally seen system requirements as fixed from the time they have been 'signed off. In reality requirements arc dynamic and subject to change as an organisation's environment changes. Flexible software techniques recognise that software requirements are subject to future changes. Flexibility is seen as an important design goal criterion with "true" or "strong" flexibility implying that an application's behaviour can be altered without …
A 2d Dwt Architecture Suitable For The Embedded Zerotree Wavelet Algorithm, James Martinez
A 2d Dwt Architecture Suitable For The Embedded Zerotree Wavelet Algorithm, James Martinez
Theses : Honours
Digital Imaging has had an enormous impact on industrial applications such as the Internet and video-phone systems. However, demand for industrial applications is growing enormously. In particular, internet application users are, growing at a near exponential rate. The sharp increase in applications using digital images has caused much emphasis on the fields of image coding, storage, processing and communications. New techniques are continuously developed with the main aim of increasing efficiency. Image coding is in particular a field of great commercial interest. A digital image requires a large amount of data to be created. This large amount of data causes …
Embed[D]Ed Zerotree Codec, Karma Wangdi
Embed[D]Ed Zerotree Codec, Karma Wangdi
Theses : Honours
This thesis discusses the findings of the final year project involving the VHDL (V= Very High Speed Integrated Circuit, Hardware Description Language) design and simulation of an EZT (Embedded Zero Tree) codec. The basis of image compression and the various image compression techniques that are available today have been explored. This provided a clear understanding of image compression as a whole. An in depth understanding of wavelet transform theory was vital to the understanding of the edge that this transform provides over other transforms for image compression. Both the mathematics of it and how it is implemented using sets of …
An Adaptive Hierarchical Fuzzy Logic System For Modelling And Prediction Of Financial Systems, Mark Kingham
An Adaptive Hierarchical Fuzzy Logic System For Modelling And Prediction Of Financial Systems, Mark Kingham
Theses: Doctorates and Masters
In this thesis, an intelligent fuzzy logic system using genetic algorithms for the prediction and modelling of interest rates is developed. The proposed system uses a Hierarchical Fuzzy Logic system in which a genetic algorithm is used as a training method for learning the fuzzy rules knowledge bases. A fuzzy logic system is developed to model and predict three month quarterly interest rate fluctuations. The system is further trained to model and predict interest rates for six month and one year periods. The proposed system is developed with first two, three, then four and finally five hierarchical knowledge bases to …
Using Multimedia Microworlds To Motivate And Engage Adult Learners, Susan B. Stoney
Using Multimedia Microworlds To Motivate And Engage Adult Learners, Susan B. Stoney
Theses: Doctorates and Masters
As educational institutions come under increasing pressure from outside forces to restructure the way students learn, efforts are being made by researchers to find ways to assist students to learn through independent thought and to solve problems in a resource-based, self-paced environment. Such an environment needs to be sufficiently interesting and novel to motivate students who begin to use it, and to continue to engage them as they progress through it. This study has sought to identify what such a learning environment needs to encompass in order to motivate and engage adult learners so that they will not only want …
An Experimental Study Into The Effect Of Varying The Join Selectivity Factor On The Performance Of Join Methods In Relational Databases, Ada Mallet
Theses : Honours
Relational database systems use join queries to retrieve data from two relations. Several join methods can be used to execute these queries. This study investigated the effect of varying join selectivity factors on the performance of the join methods. Experiments using the ORACLE environment were set up to measure the performance of three join methods: nested loop join, sort merge join and hash join. The performance was measured in terms of total elapsed time, CPU time and the number of I/O reads. The study found that the hash join performs better than the nested loop and the sort merge under …
Vector Geometry And Applications To Three-Dimensional Computer Graphics, Rory Morrison
Vector Geometry And Applications To Three-Dimensional Computer Graphics, Rory Morrison
Theses : Honours
The mathematics behind algorithms involved in generating three-dimensional images on a computer has stemmed from the analysis of the processes of sight and vision. These processes have been modeled to provide methods of visualising three-dimensional data sets. The applications of such visualisations are varied. This project will study some of the mathematics that IS used in three-dimensional graphics applications
Pathfinding In Vrml, Jason Richard Pearce
Pathfinding In Vrml, Jason Richard Pearce
Theses : Honours
Virtual Reality Modelling Language (VRML) is a scene description language which describes three dimensional (3D) space to a computer. Thus the three axis of space that is inherent in our dimension X Y and Z is represented inside a computer. To many people VRML represents a new beginning for the World Wide Web (WWW) because it behaves more like the real world. VRML is experimental, interactive, continuous and of course, three dimensional. Algorithms in computing have been designed for 2D problem solving and this does not necessarily translate to problem solving on a 3D level. The aim of this project …
Good Software Development Processes Lead To Harmonious Project Teams Which In Turn Lead To Effective Project Performance, Rweyunga Kazaura
Good Software Development Processes Lead To Harmonious Project Teams Which In Turn Lead To Effective Project Performance, Rweyunga Kazaura
Theses : Honours
The modem world relies on computers in almost every facet of life. With the explosion of Information Technology, software development has become an important process. However, from the beginning, this process has suffered and continues to suffer from a number of problems. If these problems are not rectified, they can jeopardise projects and lead to project failure. Project failure results in a project being delivered: • without satisfying the functional and non-functional requirements requested by the user or customer • beyond the agreed schedule and/or • over budget. Research indicates that practising good software development processes (SDPs) can override these …
Software Flexibility In A Web Environment, Michael Layng
Software Flexibility In A Web Environment, Michael Layng
Theses : Honours
Flexible software systems are designed to be able to adapt to changes in their environment without the need for programmer intervention. This allows companies and institutions to avoid the cost of hiring a programmer every time a business rule changes or a data structure is modified. The techniques of designing and implementing flexible 3GL software systems have been proven as a means of reducing the high cost of software maintenance caused by the changing of systems requirements. Such systems have been in operation in the European finance sector since the early 1980's. Edith Cowan University is participating in current research …
A Methodology For The Selection Of A Paradigm Of Reasoning Under Uncertainty In Expert System Development, Vivian Campbell
A Methodology For The Selection Of A Paradigm Of Reasoning Under Uncertainty In Expert System Development, Vivian Campbell
Theses: Doctorates and Masters
The aim of this thesis is to develop a methodology for the selection of a paradigm of reasoning under uncertainty for the expert system developer. This is important since practical information on how to select a paradigm of reasoning under uncertainty is not generally available. The thesis explores the role of uncertainty in an expert system and considers the process of reasoning under uncertainty. The possible sources of uncertainty are investigated and prove to be crucial to some aspects of the methodology. A variety of Uncertainty Management Techniques (UMTs) are considered, including numeric, symbolic and hybrid methods. Considerably more information …
Automatic Flowchart Displays For Software Visualisation, Paul R. Schurmann
Automatic Flowchart Displays For Software Visualisation, Paul R. Schurmann
Theses: Doctorates and Masters
Understanding large software projects and maintaining them can be a time consuming process. For instance, when changes are made to source code, corresponding changes have to be made to any related documentation. One large section of the documentation process is the creation and management of diagrams. Currently there are very few automated diagramming systems that can produce diagrams from source code, and the majority of these diagramming systems require a significant amount of time to generate diagrams. This research aims at investigating the process of creating flowchart diagrams from source code and how this process can be fully automated. Automating …
User Response And Organisational Fit For Information Systems In Earth Observation, Jeff Kingwell
User Response And Organisational Fit For Information Systems In Earth Observation, Jeff Kingwell
Theses: Doctorates and Masters
A group of seventy six scientists and data managers in the Australian research agency CSIRO were surveyed to establish their needs and preferences in relation to information systems for Earth observation data. After study of available alternatives, three prototype Earth observation information management systems were installed and the user response was evaluated through interview of fifteen of the group. The prototypes consisted of web-based client servers which permitted users to interrogate databases of Earth observation datasets; to search for information about sensor or satellite performance, and to retrieve data and information products. The chosen systems were CILS, the CEOS (Committee …
Parametric Software Project Estimating: An Analysis Of Current Practice, Stuart Hope
Parametric Software Project Estimating: An Analysis Of Current Practice, Stuart Hope
Theses: Doctorates and Masters
As society and the world economy moves into the second millennium. the service industries involving knowledge workers will continue to increase. Software is the enabling technology that is driving the knowledge industry. As the development of software is mostly a design process, where new artefacts are conceived and built, the prediction of outcomes in the process is fraught with difficulties. Software project estimating is one of the essential Software Engineering techniques that will enable the rationalisation of decision-making regarding software development. Estimates that are more accurate will increase the probability of success and lower the risk. This thesis analyses the …
Performing Cooperative Work And Conferencing On An Intranet Using Java, Thaveeporn Limpanyalers
Performing Cooperative Work And Conferencing On An Intranet Using Java, Thaveeporn Limpanyalers
Theses: Doctorates and Masters
The process of organising, preparing and conducting a meeting is a time consuming one. Additionally, geographic separation compounds the amount of effort required. Within this study, an electronic conferencing system in an Intranet environment is designed and implemented, thus enabling employees in the same organisation to meet up electronically without the dual constraints of time and space. Specifically, the study investigates incorporation of facial expressions and an ongoing polling system. The results demonstrate that a presence of facial expressions helps users to better engage in on-line discussion and that users find an ongoing poll to be useful in determining direction …
Webassess, Justin Anthony Brown
Webassess, Justin Anthony Brown
Theses : Honours
This project and research has resulted in the development of a World Wide Web (WWW) based testing system. WEBassess can be accessed and used from any point in the world that has a connection to the WWW. The WEBassess system allows for the creation and completion of tests through the WWW interface. Scoring and feedback of submitted tests is completely automated, allowing students to see their test result immediately, including visual indicators for correct and incorrect answers. These test results may then be viewed by academic staff, showing complete test details, such as unit code, test title, score, percentage, date …
The Development And Use Of The Secure Electronic Transaction (Set) Protocol On The Internet, Damon James Whyte
The Development And Use Of The Secure Electronic Transaction (Set) Protocol On The Internet, Damon James Whyte
Theses : Honours
While still in its infancy, Electronic Commerce is growing at an exponential rate each year (Walson, 1997. p.53). Although few doubt that such growth will only continue in years to come, many people still have serious reservations about the levels of security offered by currently available applications for conducting such trade. This thesis identifies some of the key areas of concern regarding Electronic Commerce on the lnternet, and looks at the ways in which the Secure Electronic Transaction (SET) model, proposed by Mastercard and Visa, succeeds or fails in addressing these concerns. It identifies and describes the key dements and …
The Toysim Project, Anthony Rodriguez
Does Good Project Management Ensure Successful Software Development?, Julie Lisa Eldridge
Does Good Project Management Ensure Successful Software Development?, Julie Lisa Eldridge
Theses : Honours
For many years the development of computer software has been plagued by poor customer satisfaction caused by missed schedules, underestimated budgets and the development of products which do not meet requirements. The ever increasing reliance on computers, as reported by Sommerville ''the result of the proliferation of computer systems into all aspects of life and business is that personal, corporate, national and international economies are [becoming] increasingly dependant on computers and software systems" ( 1992, p.2), calls for more stable software which can be developed within time and budget constraints. To achieve this, software development activities must be analysed and …
Review Of Personal Identification Systems, J. M. Cross
Review Of Personal Identification Systems, J. M. Cross
Research outputs pre 2011
The growth of the use of biometric personal identification systems has been relatively steady over the last 20 years. The expected biometric revolution which was forecast since the mid 1970's has not yet occurred. The main factor for lower than expected growth has been the cost and user acceptance of the systems. During the last few years, however, a new generation of more reliable, less expensive and better designed biometric devices have come onto the market. This combined with the anticipated expansion of new reliable, user friendly inexpensive systems provides a signal that the revolution is about to begin. This …
An Approach To Display Layout Of Dynamic Windows, Nihar Trivedi
An Approach To Display Layout Of Dynamic Windows, Nihar Trivedi
Theses: Doctorates and Masters
The development of windows based user interface has introduced a new dimension to the field of human computer interaction. Now a user is able to perform multiple tasks at a time, often switching from one task to another. However windows environment also imposes the burden of manual windows management on the user. Several studies have suggested that manual window management is an unproductive chore often resulting in clutter and confusion on the display screen. Therefore we need a automatic windows layout generator to free the user to perform other useful tasks. This thesis introduces SPORDAC {Shadow Propagation for Overlap Removal …
Randomised Shuffle And Applied Misinformation: An Enhanced Model For Contact-Based Smart-Card Serial Data Transfer, Michael Collins
Randomised Shuffle And Applied Misinformation: An Enhanced Model For Contact-Based Smart-Card Serial Data Transfer, Michael Collins
Theses: Doctorates and Masters
Contact-based smart-cards, which comply to the International Standard IS0-7816, communicate with their associated read/write machines via a single bi-directional serial link. This link is easy to monitor with inexpensive equipment and resources, enabling captured data to be removed for later examination. In many contact-based smart-cards the logical abilities are provided by eight-bit microcontroller units (MCU) which are slow at performing effective cryptographic functions. Consequently, for expediency, much data may be transferred in plain-text across the vulnerable communications link, further easing an eavesdropper's task. Practitioners in military communications protect transmitted information by varying a link's carrier frequency in an apparently random …
Towards A Model For Software Project Estimating, Stuart Hope
Towards A Model For Software Project Estimating, Stuart Hope
Theses : Honours
The use and development of software is an integral and critical part of modern industrial society. The outcomes of many software development and maintenance projects have been less than satisfactory with significant numbers being over schedule, lacking in functionality and over budget. These problems are the result of poor management of both the process and the product. One of the major problems to overcome in the management of software development projects is the ability to predict the outcomes early in the project when there are a large number of unknowns. The ability to reliably predict the outcomes in a repeatable …
The Design And Implementation Of A Toolkit For The Creation Of Virtual Environments, Jesse Kinross-Smith
The Design And Implementation Of A Toolkit For The Creation Of Virtual Environments, Jesse Kinross-Smith
Theses : Honours
Virtual Reality is a field that is steadily increasing in popularity and interest. New developments in both hardware and software have empowered developers with new devices allowing faster and better quality interaction with virtual environments. However, the emphasis of research in virtual environments has been more concerned with development of new display and input devices, as opposed to the investigation of different methods of interaction that a three-dimensional environment offers. This project designs and implements a three-dimensional, interactive, virtual environment development system upon an existing three-dimensional rendering engine. The aim of the project is to allow users to generate virtual …
Simulator For The Performance Analysis Of Cpm Schemes In An Indoor Wireless Environment, Ronald Chua
Simulator For The Performance Analysis Of Cpm Schemes In An Indoor Wireless Environment, Ronald Chua
Theses : Honours
A software simulator for characterising Continuous Phase Modulation (CPM) schemes in an indoor multipath environment has been developed using SIMULINK and MATLAB. The simulator is capable of simulating a wide range of CPM schemes to determine bandwidth efficiency and robustness to additive white Gaussian noise (AWGN) and Rician fading. Initial trials of the simulator indicate that the simulator is functioning correctly. Eventually, the simulator will be used to determine the most suitable modulation scheme for the development of an actual indoor wireless system.
An Investigation Into An Effective Method Of Automatically Analysing Oracle Applications To Count Function Points, J. L. Wong
Theses : Honours
Function Point Analysis (FPA) is a synthetic software estimation metric used for computing the size and complexity of applications. It was first introduced by Allan. J. Albrecht during the mid-seventies, as a result of a lengthy research based on applications that were developed using COBOL and PL/1 programming languages. The purpose of this research· is to investigate the possibility, and the most effective method, of automatically performing a Function Point Analysis on Oracle applications that consist of Oracle Forms and Oracle Reports. The research revealed a seemingly lack of other researches on this topic. As FPA was invented a few …
Arbitrary Views Of High-Dimensional Space And Data, Andrew Ellerton
Arbitrary Views Of High-Dimensional Space And Data, Andrew Ellerton
Theses : Honours
Computer generated images of three dimensional scenes objects are the result of parallel/perspective projections of the objects onto a two dimensional plane. The computational techniques may be extended to project n-dimensional hyperobjects onto (n-1) dimensions, for n > 3. Projection to one less dimension may be applied recursively for data of any high dimension until that data is two-dimensional, when it may be directed to a computer screen or to some other two-dimensional output device. Arbitrary specification of eye location, target location, field-of-view angles and other parameters provide flexibility, so that data may be viewed-and hence perceived-in previously unavailable ways. However, …
An Adaptive Fuzzy Logic Controller For Intelligent Networking And Control, Irshad Nainar
An Adaptive Fuzzy Logic Controller For Intelligent Networking And Control, Irshad Nainar
Theses: Doctorates and Masters
In this thesis, we present a fuzzy logic control scheme to regulate the flow of traffic approaching a set of intersections. An adaptive Fuzzy Logic Traffic Controller (FLTC) is used to adjust the green phase split of the north-south and east-west approaches of a set of traffic signals based on the actual traffic approaching the intersection. Each intersection is coordinated with its neighbouring intersections by adjusting the offset of the local intersection. The offset is adjusted by a local fuzzy logic controller loacted at each intersection. A new fuzzy control scheme, using a supervisory Fuzzy Logic Controller, is also proposed …
A Search Tool To Enhance The Selection And Utilisation Of Reusable Software Modules Within The Object-Oriented Paradigm, Robert H. Cross
A Search Tool To Enhance The Selection And Utilisation Of Reusable Software Modules Within The Object-Oriented Paradigm, Robert H. Cross
Theses: Doctorates and Masters
The affinity for reuse within the object-oriented paradigm may enable high levels of productivity; however, gains will become realisable only if a systems developer has access to tools which aid in the selection of classes. A method for object-oriented analysis and design is detailed and its process is assisted by an object-oriented search tool based on reference and corporate library technology. The search tool contributes to the determination of suitable existing inheritable classes and an explanation of its construction and use is included. A practical demonstration of the method, using the search tool, is elaborated. The thesis demonstrates that text …