Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 46 for “"290000 Engineering and Technology"”.
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An Investigation of Electro-Rheological Fluids in Engineering
… When there is no electric field, particles are randomly suspended in the base liquid. When an electric field is applied, the particles in the fluid form chains bridging the conductors of opposite polarity and turn the liquid into a solid-like gel. The process is seemingly reversible once the …
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Null Depth Trade Off for Output Power Reduction in a Downlink Adaptive Antenna Array
… algorithm steers the nulls towards interferers and the main beam towards the desired user provided the angles of arrival of these signals are known to the basestation. However, downlink adaptive arrays use additional power when they are required to include null steering in their beam patterns. …
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A Study of Wireless Modem Performance Using Multiple Element Antennas
… antenna hardware platforms, following the demand for high data rate. In correlated channels Channel State Information (CSI) at the transmitter provides a significant capacity increase over conventional Multiple Input Multiple Output (MIMO) systems. In such a case, the Singular Value …
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Transaction Models and Algorithms for Improved Transaction Throughput
… its expansion is expected to be exponential and as it grows, so too will the demands for very fast real time online transaction processing systems. One avenue for meeting the demand for increased transaction processing speed is conversion from disk-based to in-memory databases. However, while …
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Stochastic Modelling and Optimal Control of Compartment Fires
… spaces. They are labeled as oxygen driven fires and are non-stationary growth phenomenon. A gap exists in the knowledge of deterministic fire growth models and stochastic fire growth models. In this thesis we develop non-stationary stochastic models in an endeavor to bridge the gap. The class of …
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Improving the Structural Dynamics of Slender Beam-like Structures
… the external force input is of a broadband nature in frequency, similar to a white noise excitation. This force excites the slender beams into large amplitude resonance which in the case of a hot-wire probe, causes measurement inaccuracies, for milling, causes rough surface finish and …
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Blind Channel Estimation and Multiuser Detection for Multi-Rate CDMA Communications
… Currently, the study on channel estimation and multiuser detection for multi-rate DS/CDMA, which makes full use of the nature of multi-rate signals, is still at its early stage. The thesis deals with the application of subspace-based techniques to blind channel estimation and multiuser …
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Different Multiple Input Multiple Output Systems
… antennas radiate in the same frequency band so the overall spectral efciency becomes very high. Such a multiple antenna scheme, popularly known as Multiple Input Multiple Output (MIMO) has potential application in wireless local area networks (WLAN) and cellular micro-cells. One reason is …
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Measurement of Window Glass Temperature With a Fluorescence Intensity Ratio Optical Fibre Sensor
… made between the intrinsic optical fibre sensor and thermocouples (the conventional temperature measuring device used in fire research). Neodymium doped fibre was used as the temperature sensing element. Due to the destructive nature of the fire tests on the neodymium doped fibre, a new section …
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Opportunity Capture and Growth Strategies for Regional Ports: A Modelling Approach
… have often developed as bulk ports (Hilling and Hoyle 1984), but for most there is a recognition that they may be no longer able to rely solely on the benefits of exploiting bulk commodities and trades to sustain competitive advantage and growth. To attain growth and survival there is the …
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Capacity Improvement Using Adaptive Sectorisation in WCDMA Cellular Systems With Non-Uniform and Packet Mode Traffic
… goals in terms of quality of service (QoS) and system capacity. This investigation deals with the problem of hot spots in a bid to improve system capacity at acceptable quality of service levels. Among the techniques considered is the adaptive ectorisation and its implementation with finite …
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A Study of Air Flow Effects on the Cushioning Characteristics of Multi Layered Pre-Compressed Fibreboard
… make it a sustainable replacement for poly-foam and polystyrene. Pre-compressed multilayered fibreboard cushions have most of the structural resistance and damping removed, and the properties of air-flow through the flutes becomes a more predominant, they behave more like a soft spring. …
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Use of Stormwater as an Alternative Supply Source
Changing climate, increasing demand for potable water supplies and increased community interest for sustainable use of fresh water sources have resulted in a new focus on water use and sourcing. New sources are being sought, in conjunction with water demand minimisation strategies, to decrease the …
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Student experiences of problem-based learning in engineering: learning cultures of PBL teams
… study investigates the experiences of first year engineering students to a newly implemented engineering problem-based learning (PBL) curriculum at Victoria University; its effects on their approaches to learning and their learning outcomes. This qualitative study, which uses ethnographic …
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Liquid sloshing in containers with flexibility
… significantly influenced by these oscillations, and their interaction with the sloshing liquid could lead to instabilities. It is critical to predict and to control sloshing in order to maintain safe operations in many engineering applications, such as in-ground storage and marine transport of …
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Soft computing techniques in power system analysis
… that has come into prominence in recent times and its application to power system analysis is still more recent. This thesis explores the application of soft computing techniques in the area of voltage stability of power systems. Soft computing, as opposed to conventional “hard” computing, is a …
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Development of a decision support system for flood forecasting and warning – a case study on the Maribyrnong River
… costly types of natural disasters in Australia and other parts of the world. It was reported that the average annual cost of flood damage in Australia was about $300 million as at 1994. However, the effects of flooding can be mitigated, and thereby reduce the loss of life and damage to property. …
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Development of LDPE-based antimicrobial films for food packaging
… is aimed at killing or inhibiting the spoilage and pathogenic microorganisms that may contaminate packaged food products. Over the years there has been an increased emphasis on naturally derived AM agents and polymer films containing AM agents derived from basil, for example, exhibit an AM …
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Cure monitoring of composite materials using optical techniques
… remote all optical technique for the generation and detection of ultrasonics in epoxy materials has been developed at Victoria University. This requires a high power pulsed laser to induce ultrasound in the sample and an optical fibre interferometer for detection. The output of the interferometer …
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A neural fuzzy approach to modeling the thermal behavior of power transformers
This thesis presents an investigation and a comparative study of four different approaches namely ANSI/IEEE standard models, Adaptive Neuro-Fuzzy Inference System (ANFIS), Multilayer Feedforward Neural Network (MFNN) and Elman Recurrent Neural Network (ERNN) to modeling and prediction of the top …
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