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Title: A security architecture for IPv6 enabled wireless medical sensor networks.
Contributors: M. Abdul Alim (author), Liang Chen (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: We present the design of an IPv6 enabled wireless sensor network based on the IEEE 802.15.4 standard for medical monitoring. We design a routing mechanism for efficient flooding, a hop-by-hop error recovery and congestion control mechanism for reliable packet delivery and a lightweight security architecture for the medical monitoring system. We extend the widely used Extensible Authentication Protocol (EAP) to employ the Generalized Pre-shared Key (GPSK) authentication method with some optimizations for securing the system. We use the 3-party EAP model with the Personal Area Network Coordinator (PAN coordinator) of IEEE 802.15.4 standard as the EAP authenticator for authenticating sensor nodes within the radio range of the PAN coordinator. In order to use EAP authentication for a sensor node several hops away from the PAN coordinator, we define a new role (relay authenticator) for its coordinator which tunnels EAP messages to the PAN coordinator securely. We define EAP message encapsulation for IEEE 802.15.4 networks and a key hierarchy for the security architecture. We have simulated the system and shown that EAP based authentication is feasible in wireless sensor networks.
Discipline: Computer Science
Content Model: info:fedora/ir:thesisCModel
Date added: 2008

Title: Connectionless routing protocols for mobile ad-hoc networks.
Contributors: Yong Sun (author), Kuppuchamy Alagarsamy (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: No abstract available.
Discipline: Computer Science
Content Model: info:fedora/ir:thesisCModel
Date added: 2005

Title: Prediction and preemptive control of network congestion in distributed real-time environment
Contributors: Ramandeep Dhanoa (author), Haque Waqar (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: Due to ever increasing demand for network capacity, the congestion problem is inflating. Congestion results in queuing within the network, packet loss and increased delays. It should be controlled to increase the system throughput and quality of service. The existing congestion control approaches such as source throttling and re-routing focus on controlling congestion after it has already happened. However, it is much more desirable to predict future congestion based on the current state and historical data, so that efficient controlling techniques can be applied to prevent congestion from happening in future. We have proposed a Neural Network Prediction-based routing (NNPR) protocol to predict as well as control the network traffic in distributed real time environment. A distributed real time transaction processing simulator (DRTTPS) has been used as the test-bed. For predictions, multi-step neural network model is developed in SPSS Modeler, which predicts congestion in future. ADAPA (Adaptive Decision and Predictive Analytics) scoring engine has been used for real-time scoring. An ADAPA wrapper calls the prediction model through web services and predicts the congestion in real-time. Once predicted results are obtained, messages are re-routed to prevent congestion. To compare our proposed work with existing techniques, two routing protocols are also implements "" Dijkstra's Shortest Path (DSP) and Routing Information Protocol (RIP). The main metric used to analyze the performance of our protocol is the percentage of transactions which complete before their deadline. The NNPR protocol is analyzed with various simulation runs having parameters both inside and outside the neural network input training range. Various parameters which can cause congestion were studied. These include bandwidth, worksize, latency, max active transactions, mean arrival time and update percentage. Through experimentation, it is observed that NNPR consistently outperforms DSP and RIP for all congestion loads. --Leaves [i]-ii.
Discipline: Computer Science
Content Model: info:fedora/ir:thesisCModel
Date added: 2016

Title: A study of the Destination Guided Mobility models.
Contributors: Md. Azizur Rahman (author), Alex Aravind (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: Mobility models play a critical role in the simulation studies of Mobile Ad hoc Networks (MANETs). They greatly influence the performance of MANET routing protocols. For MANET simulations, random mobility models have been used in nearly all research studies in the past. In recent times, several studies have criticised the use of random mobility models in the performance studies of MANETs for the lack of realism in modelling mobility. Therefore, questions have been raised regarding the credibility of MANET simulation studies. Realism and simplicity are two attractive properties of mobility models achieving both together in modelling mobility has been a challenging task. Recently, a framework of mobility models called Destination Guided Mobility (DGM) models for MANETs with a basic software tool was proposed. This framework can be used to develop several simple DGM models with improved realism. This thesis is primarily interested in studying DGM models for their suitability in modelling mobility in various MANET scenarios. Our study requires a suitable simulation testbed for DGM models. Designing such a tool, referred to as DGMGen, with suitable functionality to study DGM models is the secondary objective of this thesis. More specifically, after the design and implementation of DGMGen, we study: i) the generality of the DGM models by modelling different real world scenarios ii) the connectivity analysis of three basic DGM models in comparison with the widely used Random Waypoint (RWP) mobility model iii) how to model a real life scenario using DGM models, based on the trace collected from that scenario and iv) the impact of DGM models on the Ad hoc On-demand Distance Vector (AODV) routing protocol using NS2. Our study shows that i) the DGM framework is powerful in capturing various MANET scenarios simply and more accurately, ii) DGM models confirm higher level connectivity prevailed in most real world scenarios, iii) DGM models can generate approximately the similar trace based on the insights of a real trace
Discipline: Computer Science
Content Model: info:fedora/ir:thesisCModel
Date added: 2013

Title: Design and implementation of MDeluge multicast code dissemination system for wireless sensor networks.
Contributors: Xiao Zheng (author), Behcet Sarikaya (Thesis advisor), Siamak Rezaei (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: No abstract available.
Discipline: Computer Science
Content Model: info:fedora/ir:thesisCModel
Date added: 2007

Title: The use of technology and the internet in the adaptive business and marketing strategies for the sustainability of small to medium sized travel agencies
Contributors: Phil Mentacos (author), Sungchul Choi (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: Technology and the Internet have brought on monumental changes in how we live, learn, communicate, shop and travel. Businesses that have been around for decades have evaporated as a result of the expansion and growth of the Internet. In the travel and tourism industry, travel agencies are seen as middlemen, and it makes sense that efficiencies could be gained by removing them. The Internet has enabled the supplier to reach the consumer directly, and the consumer can go directly to the source. This notion has been brought up many times over the past ten to fifteen years, and yet travel agencies are still around. Various studies show that there still exists value for agencies. Customer service, custom products, education and consultation are all resources and capabilities valued in travel agencies. If a travel agency can differentiate itself through its value proposition and value chain, provide custom products and services to its clients, align itself strategically with other industry players, and brand and market itself through carefully evaluated and selected channels, it will not only survive in the industry but can thrive as well. --Leaf ii.
Discipline: Business Administration
Content Model: info:fedora/ir:thesisCModel
Date added: 2013

Title: An adaptive load sensing priority assignment protocol for distributed real-time database systems.
Contributors: Shah Nahid Mahmud (author), Waqar Haque (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: Transaction processing in a distributed real time database system (DRTDBS) is coordinated by a concurrency control protocol (CCP). The performance of a CCP is affected by the load condition of a transaction processing system. For example, the performance of the Adaptive Speculative Locking (ASL) protocol degrades in high load conditions of the system. Priority protocols help a CCP by prioritizing transactions. The performance of the priority protocols is also affected by system load conditions, but they can be optimized by dynamically switching between priority protocols at run time when the system load changes. The objective of this research is to develop a protocol, Adaptive Priority Assignment protocol (APAP), which changes the priority protocol at run time to improve the performance of a CCP in a DRTDBS. APAP is implemented in a DRTDBS, where ASL is used as the underlying CCP to validate APAP. The performance of APAP was tested under varying system load conditions with various combinations of the database system parameters. Under the scenarios tested, APAP performed better than other priority protocols and demonstrated that dynamic selection of priority protocols during run time is an effective way to improve the performance of a CCP in a DRTDBS. --Leaf ii.
Discipline: Computer Science
Content Model: info:fedora/ir:thesisCModel
Date added: 2013

Title: Unlocking the garden: motherhood in Frances Hodgson Burnett's The Secret Garden
Contributors: Deborah S. Nielsen (author), Kristen Guest (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: This thesis explores the representation of motherhood in Frances Hodgson Burnett's novel, The Secret Garden, and seeks to complicate our understanding of motherhood by moving from the static, binary notions central to Victorian culture to motherhood as a form of positive agency. Previous scholarship centers on the debate about Mary's agency and whether this reads as either reinforcing or subverting the patriarchal norms of the Victorian period this work seeks to link questions about Mary's agency to the text's representation of motherhood as a diverse, politically-inflicted, and fluid subject position. Burnett's secret garden is the centre of the book's tensions either as a site of exclusion or as a source of power. Reading the garden as a metaphor for motherhood and drawing upon the unique associations of the garden and the role of Victorian gardening literature, I suggest that Burnett offers a model of female agency that subtly challenges patriarchal norms. --Leaf ii.
Discipline: English
Content Model: info:fedora/ir:thesisCModel
Date added: 2015

Title: Linear separability of the vertices of an n-dimensional hypercube.
Contributors: Nicolle Gruzling (author), Lee Keener (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: No abstract available.
Discipline: Computer Science
Content Model: info:fedora/ir:thesisCModel
Date added: 2007

Title: Design and implementation of virtual network testbeds for routing protocols
Contributors: Julius A. Bankole (author), David Casperson (Thesis advisor), Alex Aravind (Thesis advisor), University of Northern British Columbia (Degree granting institution)
Abstract: In this project, we present the design and implementation of virtual network testbeds for studying routing changes. A virtual network testbed is a computer network that is completely created in software, while routing changes directly impact on the reliability and the reachability information of the network. We used testbeds to emulate a small and a large-scale network on a single Linux machine. These emulated networks allow the study of network behavior and operations which are examined using two routing protocols: Routing Information Protocol (RIP) and Open Shortest Path First (OSPF). We implemented a fifteen-node network to study RIP, and a model of the GÈANT network to examine OSPF in virtual network testbeds. Each testbed represents an autonomous system (AS) or an intra-domain environment. Therefore, these environments provided us with the opportunities to evaluate routing changes in an AS. We used the testbeds to compare the routing of the original network with the new routing of the missing links and routers to see what changes occur. The GÈANT network is the large-scale network used for investigations in this project. We then used our emulation results of the large-scale network to compare with the simulation work for the same network topology-the GÈANT network, and confirmed that our emulation studies also identified important links and routers in the same network. --P.ii.
Discipline: Computer Science
Content Model: info:fedora/ir:thesisCModel
Date added: 2009