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The focus of this thesis is on end-to-end (e2e) queueing performance evaluation and resource allocation in order to improve the performance of the relay-enhanced cellular networks. It is crucial to study both the performance of the data link layer and the physical layer issues. Therefore, we first consider end-to-end queueing performance evaluation and after that to consider physical layer issues, we present power allocation schemes, relay load balancing and relay assignment. First, we presented a framework for the link-level end-to-end queueing performance evaluation. Our system model consists of a base station, a relay, and multiple users. The e2e system is modeled as a probabilistic tandem of two finite queues. Using the decomposed model, radio link-level performance measures such as e2e packet loss rate, e2e delay and throughput are obtained analytically and compared with simulation results. A framework for power allocation for downlink transmissions in decode-and-forward relay networks is investigated. We consider a system with a single base station communicating with multiple users assisted by multiple relays. The relays have limited power which must be divided among the users they support in order to maximize the data rate of the whole network. Based on knapsack problem, the optimal power allocation is proposed. To consider fairness, weighted-based scheme is presented. Moreover, to utilize the power wisely, an efficient power reallocation scheme is proposed. Simulation results demonstrate the efficacy of the proposed schemes. By applying the relay selection scheme, it may happen that some relays have more users connected to them than other relays, which results in having unbalanced load among the relays. In order to address this issue, a game theoretic approach is presented. Coalition formation game is proposed based on merge-and-split rule to form the optimal structure. The simulation results demonstrate the effect of applying game in proposed problem. Finally, the relay assignment procedure is studied. The optimal solution is found using Lagrangian Relaxation. Then, a lighter algorithm is proposed to efficiently carry out the relay assignment. Simulation results show that the proposed algorithm can achieve near optimal data rate, while it decreases the processing time significantly.

In light of the massive growth of creation and consumption of video, in this thesis I explore the concept of user-enhanced video browsing and evaluate the quantitative and qualitative effects of this approach. For this purpose, I create a unique prototype based on the VLC media player. The player interprets user-generated video tagging and annotations in my designed format, and allows the viewing of multiple event layers to create a personalized video playback. I perform evaluations in two user studies for this work. Among my observations I find benefits in navigation, personalization, consumption, and comprehension. I then look at the way viewers behave when contributing data of annotations and tagging. I find their preferred tasks, their perceived quality of other contributions, as well as their opinions on this system. I conclude with a discussion of the results and list possible use-cases for this concept.

Restoration and rehabilitation activities are presently considered to be a major priority in environmental management, whether the activity implies the restoration of neglected cultivated pastures or degraded rangelands due to overgrazing and climatic impacts, or the rehabilitation of the mining and industrial areas. However, the goals are not easily achieved, mainly due to the high input costs, including that of re-seeding activities. Reseeding success is influenced by the quality and effectiveness of the used seed regarding germination and establishment under natural field conditions. If techniques can be developed to enhance the effectiveness of germination and establishment percentage of the seed in restoration and rehabilitation sites, a better cover, density and biomass yield can be expected, which will improve the rehabilitation process. It is known that commercially available grass seed has a better germination percentage and establishment percentage in comparison with seed locally harvested, which may include many impurities such as sticks and stones. The availability of the locally harvested seed types, especially of certain ecotypes adapted to specific environments, can be poor. Advance Seed Company (Krugersdorp, South Africa) has taken commercially available grass seed to the next level by enhancing (coating) the seed with a multitude of different treatments to ensure better handling of the seed in reseeding applications. These treatments also have advantages such as a higher seed to soil contact, growth stimulants included in the treatment, higher seed purity and the protection of the seed against predation by ants and other insects and against harsh chemicals in the soil, which might have an influence on the germination percentage of the seed and the establishment of seedlings. The objective of this study was to investigate whether or not certain enhanced grass seed types of selected grass species will have a better germination and establishment percentage, fresh and dry above-(leaves) and below-ground (root) biomass yield (glasshouse trials) and dry above-ground biomass yields (natural fields trials) in comparison with non-enhanced types. The predation of enhanced and non-enhanced seeds by ants and other insects, as well as the development of the vascular tissue in the transitional region of the seedlings was also investigated. The grasses assessed included enhanced and non-enhanced seed types of Chloris gayana (Rhodes grass), Cynodon dactylon (Couch grass), Digitaria eriantha (Common finger grass) and Eragrostis curvula (Weeping love grass). In the case of E. curvula, four seed types, including the non-enhanced seed type were tested. These included non-enhanced seed, seed treated with "plain coat", enhancement with "organic insecticide on the base of the coaf' (Le. insecticide between the enhancement and the seed) and enhancement with "organic insecticide on the base of the coat and as an overspray" (Le. insecticide between the enhancement and the seed, as well as spraying the insecticide over the coated seed). The above mentioned species are commonly used in grass seed mixtures for rehabilitation and restoration purposes. Seeds were supplied by Advance Seed Company. The seed enhancement treatments as well as the non-enhanced seed types were tested under various conditions. The chemical composition of the enhancement treatment used in the coating process is only known by the seed technicians at Advance Seed Company. All the seed supplied by the seed merchant had a purity of >95%. With the application of dormancy breaking in the germination tests the non-enhanced seed types of Chloris gayana had the higher germination percentage of the seed type or the same species. Other differences included the germination percentage being significantly higher for the enhanced seed type of Cynodon dactylon than the non-enhanced seed type. Lower germination percentages were noted in the comparison of the E. curvula seed types, were the non-enhanced seed type had a higher germination percentage in comparison with the enhanced seed types. In the germination tests without dormancy breaking being applied, these results differ. With regard to the establishment percentages, similar statistical differences were noted in both the Coco Peat Moss medium and the Hygromix growth medium. In the above-and below-ground biomass production trials in the glass house the only significant difference were noted in the biomass production of D. eriantha plants. In the case of the dry above-and below-ground biomass yield the plants of the non-enhanced seed types of D. eriantha yielded a significantly higher biomass in comparison with the plants harvested from the enhanced seed type of the same species. With regard to the natural field trials a few significant differences were noted. The results indicated that the enhanced seed types of Chloris gayana and Cynodon dactylon, the non-enhanced seed type of D. eriantha as well as the non-enhanced and "organic insecticide on base and as overspray" enhancement of E cUNula can be used in re-seeding restoration and rehabilitation practices. Eragrostis cUNula enhanced with "plain coat" is not recommended to be used for re-seeding in disturbed areas. / Thesis (M.Sc. (Environmental Science and Management))--North-West University, Potchefstroom Campus, 2008.

The importance of human resource development as a means of ensuring that the organisation and institution maintain their competitiveness cannot be over-emphasised. Training and development of employees are critical to organisations, because it ensures the acquisition of required skills, which is paramount for the provision of effective service delivery, in particular local sphere of government. The Workplace Skills training that refers to the strategic human resource training and development, aims at developing the workforce, labour skills capacity, thereby achieving the institutional goals, policies and objectives of the institution. The Workplace Skills Plan is the key strategic planning document relating to workplace training, career pathing and employment equity for the Municipality. It details the training planned by a municipality in a given financial year as legislated by the Local Government Sector Education Training Authority (LGSETA). Workplace Skills Plan, through LGSETA, the Skills Development Legislative framework and the Employment Equity Act, makes provision, ensuring that employees in the public service should enhance their skills in order to deliver effective services to its customers, the public. For quality and effective service delivery at the Nigel Local Municipality to take place, the implementation of the Workplace Skills training is imperative for the enhancement of a skill workforce that will be able to ensure that the customer is satisfied with the product and service rendered by the employees. / Thesis (M. Development and Management)--North-West University, Vaal Triangle Campus, 2009.

The Sedibeng District Municipality (SDM), according to its Integrated Development Planning Report 2009, is a Category C municipality established in the Gauteng Province. It is the only area of the Gauteng Province that is situated on the banks of Vaal River and Vaal Dam, covering the area formally known as the Vaal Triangle including of Nigel and Heidelberg. It includes the towns of Vereeniging, Vanderbijlpark, Meyerton, and Heidelberg as well as the historic townships of Evaton, Sebokeng, Bophelong, Sharpville, and Ratanda, which have a rich political history and heritage. The SDM covers the entire southern area of Gauteng Province, extending along 120 km axis from East to West. The total geographical area of the municipality is 4630 square kilometers and the numbers of households living are 241223. In order to serve the communities, the municipality needs technologically advanced systems to deliver services efficiently. The study therefore focused on the implementation of e-administration for enhanced service delivery at SDM. The review of Sedibeng District Municipality Integrated Development Plan 2009 regarding service delivery does not indicate any statement recorded regarding e-government as the tool to help speedup service. According to SDM IDP, 2009 the Sedibeng District Municipality has other ICT initiatives such as the implementation of the CCTV in Vanderbijlpark CBD. While Sedibeng District Municipality Website 2009 states that the e-government will be implemented, even the Sedibeng District Municipality‘s website has outdated information. Other pages are still on development viz. visitors, business and residents. There is not much information on the clusters regarding their plans‖. In order to improve the challenge, the study hypothesized that ―lack of effective implementation of e-administration may lead to inefficient service delivery at Sedibeng District Municipality. The findings from the literature review and the empirical research support the central statement. Findings indicate that the SDM is aware regarding the significance of e-administration. The employees at the SDM are therefore receiving training from external service providers to enhance their expertise in the field of e-administration. The SDM needs to be aware and empower community members to understand the utility of e-administration for fast and convenient delivery of services. The SDM needs to invest in human resources to advance the service delivery through appointment of skilled and expert personnel. The adequate implementation of e-administration at the SDM level and the appropriate e-participation by the community members are the foundation blocks of improved and enhanced service delivery. The study recommends that SDM needs to appoint personnel advanced in technology; organize training sessions to enhance technological skills of existing employees on continuous basis; organize public participation forums for community members regarding the significance and utility of e-administration for improved service delivery; organize training sessions for community members to empower them with the technological means of participation; improve its website for the community members to log-in their requests; establish one-stop centres for the community members to utilize the e-administration. This is an imperative step as not all community members have access to computers and internet at home; deploy facilitators to train community members regarding the procedures of e-administration in their local language(s); and to improve on e-infrastructure in the form of establishment of kiosks in rural areas. This will assist geographically scattered community members to approach the municipal officials with ease The study recommends to further explore the concept of e-administration to combat bureaucracy and enhance transparency in the government processes in general and at the grass-roots level in particular. / Thesis (M. Development and Management)--North-West University, Vaal Triangle Campus, 2011