Masters Theses
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The Masters Theses collection contains digital copies of AUT University masters theses deposited with the Library since 2002 and made available open access. From 2007 onwards, all theses for masters degrees awarded are required to be deposited in Tuwhera Open Theses & Dissertations unless subject to an embargo.
For theses submitted prior to 2007, open access was not mandatory, so only those theses for which the author has given consent are available in Tuwhera Open Theses & Dissertations. Where consent for open access has not been provided, the thesis is usually recorded in the AUT Library catalogue where the full text, if available, may be accessed with an AUT password. Other people should request an Interlibrary Loan through their library.
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Browsing Masters Theses by Supervisor "Al-Anbuky, Adnan"
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- ItemBluetooth information exchange network(Auckland University of Technology, 2008) Liu, XiaoningBluetooth is a low cost and low power wireless technology for connecting portable and / or fixed Bluetooth enabled devices to form short-range wireless ad hoc personal area networks (PANs). As the Bluetooth specification does not specify a protocol to form ad hoc Bluetooth networks, a method for forming an efficient Bluetooth network under a practical networking scenario is still an open research problem. This thesis introduces an approach to implement an indoor ad hoc Bluetooth wireless network, Bluetooth information exchange network (BIEN). This network formation is based on Bluetooth and Java technologies. A set of Bluetooth enabled devices configured with the BIEN software application are able to spontaneously establish a dynamic multi-hop wireless network using Bluetooth technology without the need of formal network infrastructure, centralized administration, fixed routers or access points. In this study, the performance evaluation focuses on the relation between network capacity and topology by testing end-to-end performance in terms of throughput and the latency of communication links with various parameters, including the hop number between nodes and the number of slaves in piconets. The evaluation results show that the throughput reduces with the increased length of a path, and with an increase in the number of slaves in a piconet in the network. The latency also increases with path length, and with the number of slaves in a piconet in the different experimental BIENs, whether if there is traffic or not in the networks. Experimental results have further confirmed the necessity to minimize the number of bridge nodes in the Bluetooth networks due to their traffic bottleneck effect. This work is an attempt at implementation of a distributed multi-hop scatter net with an integrated routing protocol in the practical environments, while most of the literature focuses on covering the modelling of it. It intends to demonstrate how Bluetooth technology with Java technology can be used to design, develop and deploy ad hoc wireless networks with the commercial Bluetooth devices, and examine how well Bluetooth technology supports ad hoc multi-hop wireless network technology.
- ItemDevelopment of a Wireless Friendly Fire Prevention System Model(Auckland University of Technology, 2010) Walker, Craig GrahamWhile hunting animals is not considered the most ethical of activities, it is in most regions of the world considered sport, and in some locations still a process of food gathering. The focus of this research is on the accidental shooting of hunters by hunters. The hunting accident is an all to common event experienced throughout the world since mankind first hunted for a meal with a ranged weapon. Now with the use of wireless technology an electronic safeguard system can be designed that will aid in preventing hunting accidents. This thesis will present a method of friendly fire prevention and will attempt to test this concept as a viable solution to the problem. The concept presented here investigates into the use of location based systems combined with directional data acquisition systems, integrated with a networking ability to pass data between sensor interfacing clones of itself. The principle of the concept is to use both the sensor and networked data acquired to conclude on a possible dangerous shot situation and hence gaining the ability to alert the hunter who’s aim is causing the dangerous situation. This project is composed of the generation of a modelling application that is used to generate dangerous shooting situations between simulated hunters and to test the concept friendly fire prevention method desired. Further more this project contains the development of a physical prototype with contained embedded code written to simulate sections of the desired friendly fire prevention method. This prototype system has the chosen sensors individually tested to show the level and quality of data available to the intelligence of the prototype. This intelligence is in turn tested as a completed example of the concept functioning. Results from the model will show that even a simple system can provide up to 17% protection coverage from all dangerous shots up to 1000m. Other specific results generated indicated that approximately 25% of hunters mistakenly targeted due to vegetation up to a range of 500m could be saved using this friendly fire prevention method.
- ItemMobile phone based remote monitoring system(Auckland University of Technology, 2008) Liu, DanyiThis thesis investigates embedded databases and graphical interfaces for the MicroBaseJ project. The project aim is the development of an integrated database and GUI user interface for a typical 3G, or 2.5G, mobile phone with Java MIDP2 capability. This includes methods for data acquisition, mobile data and information communication, data management, and remote user interface. Support of phone delivered informatics will require integrated server and networking infrastructure research and development to support effective and timely delivery of data for incorporation in mobile device-based informatics applications. A key research and development (R&D) challenge is to support effective and timely delivery of data for incorporation in mobile device-based informatics applications. Another important aspect of the project is determining how to develop efficient graphics for the small mobile screen. The research investigates and analyses the architecture of a mobile monitoring system. The project developed a generic solution that can be implemented in a number of commercial sectors, such as horticulture, building management and pollution/water management. The developed concept is tested using data relevant to the horticultural area of application. The system also addresses the main issues related to mobile monitoring, including real-time response, data integrity, solution cost, graphical presentation, and persistent storage capabilities of modern mobile devices. Four embedded databases based on J2ME have been investigated. Two of the four have been evaluated and analysed. The Insert function, Sequence Search, and Random Search of Perst List and RMS (Record Management System) databases have been tested. The size of the processed data was limited to 20,000 records when using the wireless toolkit simulator, and 11,000 records when using a mobile phone. Perst Lite reflects good performance and has out-performed RMS in all tests. User interface software such as J2ME Polish for mobile phones has been investigated. Custom J2ME class for graphical interface is developed. This provides the graphical presentation of the data collected from the sensors; including temperature, wind speed, wind direction, moisture, and leaf wetness. The graphical interface, bar charts, and line charts with trace ball for collected data have been designed and implemented. The embedded database performance and project performance have been investigated and analysed. The performances of Perst Lite and RMS are evaluated in terms of the insert, sequence search, and random search functions based on simulation and real devices. The record numbers vary from 1,000 to 20,000. The project performance contains data receiving and storage, and data presentation and configuration. The performance of data storage and configuration can be negated due to the running mode and the response time. Thus, data presenting performance is the key focus in this project. This performance was divided into the categories of initial, data search, data selection, and charting. The initial performance includes the initialisation of the project parameters, and the reaching of the welcome interface. Data search performance refers to the retrieval of the specified data from the embedded database, measured on 48 data points, which only can be presented on the mobile screen from the retrieved data. These four performance types are measured in thousands of record numbers, varying from 1,000 to 18,000 record numbers, with the retrieved data range varying from 1 day to 30 days.
- ItempH Wireless Sensor Network for the meat tenderizing process(Auckland University of Technology, 2010) Devan, VashuThe wireless sensor network is a paradigm shift from the conventional wired system and has made remarkable progress in the last ten years. The system is cost effective, efficient, and user friendly as there is no need for external cables to interconnect devices. There are significant opportunities widely available to assess existing wired systems, and with thorough feasibility studies, most of these could be easily converted into wireless systems. A conceptual pH Wireless Sensor Network based on decentralized architectural paradigm is proposed in this thesis to introduce wireless connectivity and enhance system characteristics of a wired meat tenderising system. The network consists of pH Sensor Nodes and Stimuli Actuator Nodes. The focus of this thesis is the architectural design of these nodes and development of prototypes. Carcass pH is determined non-intrusively using a proprietary pH analysis alogrithm and process. This method enables pH analysis of carcasses in a meat plant without stopping the conveyor. The basis of the design is distributed processing and the collaborative nature of a Wireless Sensor Network. This showed that a network of sensor/actuator nodes could replace the existing wired meat tenderizing system and effectively handle the meat tenderizing process. The key benefit anticipated from the proposed wireless network node architecture in this thesis, is an intelligent re-configurable system that is compact, modular, cheaper and easier to install. The need for precise and consistent results creates an opportunity for further improvements to signature (spectrum of carcass response to stimuli) sensing and signature analysis algorithm. There is also scope for adding intelligence to the actuator nodes to aid in developing a fault tolerant system with a failsafe mode. While this project is a miniaturised version of real time process control, future studies could target replacement of wired industrial process control entirely with wireless sensor networks. The objectives of the project were met following the set up of the ZigBig network to simulate meat tenderizing process control, and design of the sensor node and actuator node architecture. A set of standard tools were also determined as part of the project, and are readily available in the market. The major achievement of the project was the development of sensor node and actuator node prototypes, consistent with the expectations of the sponsors and handed over to Merit of Measurement, Auckland.
- ItemThe automatic eye alignment of an infrared optometer(Auckland University of Technology, 2009) Taylor, David GlenvilleThe ability of the human eye to change its overall refractive power so that people can focus on objects both far and near is termed accommodation. Research into how the eye automatically changes its accommodation, demands an instrument capable of tracking the accommodation with fine resolution and adequate corner frequency. An instrument capable of tracking the ocular accommodation is called an optometer. Reports of earlier optometers show that optometers using the older Scheiner principlecan have the required precision and dynamics required to track the micro fluctuations accommodation. However optometers using the Scheiner principle require precise alignment to the patient’s pupil to be maintained throughout the measurement time. Previous optometers have used the radiation reflected from the patient’s cornea (calledthe corneal reflection) to initially align the optical axis of the optometer to the centre of the patient’s pupil. Since the Scheiner principle optometer uses radiant energy reflected from the patient’s retina to make a refractive measurement, the idea of using this same radiant energy for patient alignment is investigated. Earlier optometers have blocked the corneal reflection from reaching the photodetectors for the retinal reflection using a small fixed light stop. Since it is not possible to use a fixed light stop if the retinal reflection is used for alignment, the feasibility of using crossed linear polarizers is experimentally evaluated. The results showed that about78% of the radiant energy reflected from the front lens of an artificial eye could be eliminated using crossed linear polarizers. Whether the Scheiner principle measurement of refraction of an artificial eye could be done with 78% of the front lens (corneal) reflection removed was investigated. The results were not conclusive. There was not a measureable indication of when the refraction of the experimental optometer matched that of the artificial eye. The experimental optometer system attempts to use a servo controlled mirror system to move the optical axis of the optometer so that it coincides with the optical axis of an artificial eye. The design, development and testing of the mirror system is described. The mirror system enables the optometer to perform a two dimensional scan over the pupil plane of the patient’s eye or an artificial eye. During the scanning, the total radiant power reflected can be measured. For the optometer to be aligned using radiation reflected from the retina, a scan of the pupil plane of should reveal the pupil boundaries. This was experimentally demonstrated to work. Unfortunately time limitations did not permit further development of an automatic eye alignment and tracking system.
- ItemWildfire hazard prediction: a fuzzy model for Sensor Embedded Intelligence(Auckland University of Technology, 2011) Koppula, Lakshmi BhargaviThis thesis investigates the topic of “Wildfire hazard prediction” through conducting an in-depth study on fuzzy prediction methods and geographically collected weather data. The study explores the impact of various environmental factors leading to Wildfire. These factors associated with Wildfire are extracted from analyzing the past raw weather data and using McArthur’s Fire Danger Index formulations. The indices calculated through the formula and the generated synthetic data are used to train a Fuzzy system developed in Matlab software. The trained Fuzzy system is then tested with a raw set of historical real weather data originated from National Rural Fire Authority (NRFA) and National Institute of Water and Atmospheric Research (NIWA) to analyze the accuracy of the system developed. Finally, the predicted results of the Fuzzy system are examined and compared with that calculated using the formula, including the error percentiles between the two. Impacts of the input weather factors are also plotted in relation to the Fire Danger Indices under various conditions to understand their sensitivity towards the final prediction.