This study was undertaken to investigate the school and classroom factors that contribute / Thesis (M.Ed.) - University of KwaZulu-Natal, Pietermaritzburg, 2007.

This study examines the perceptions of the employees of Peoples Bank towards Performance Management. The subjects were 190 non-managers and 46 managers selected from Peoples Bank branches nationally, and from Head Office. All 236 of the voluntary participants completed a mixed-model questionnaire requiring qualitative and quantitative data, where the quantitative data was measured using a Likert Scale. The approach taken to make sense of the data involved the use of descriptive statistics. From the responses received, histograms were prepared reflecting the respondents' views in relation to each question. There is a strong correlation between what the various experts say should be included in a Performance Management System and what the employees of Peoples Bank want included. It is conclusive that employees want a system that is fair and objective; they want to be given regular feedback on their performance; they want to be appraised on measurable criteria and they want to have a say in setting their performance goals. They also want to be trained and developed and, finally, they want to be rewarded in accordance with their performance. The implication is that Peoples Bank will need to re-visit its current Performance Management System to ensure that due consideration is given to employee views for the system to achieve its objectives whilst maintaining its credibility. / Thesis (MBA)-University of Natal, Durban, 2003.

Call Centres employ frontline staff commonly known as service consultants who interact with customers within the service oganisation.In order for organizations to ensure that they derive satisfaction from interactions with frontline employees as part of their main objectives, they make use of a human resource practice widely known as performance appraisals or assessments in order to determine if employees’ performance during their interactions with customers produce organization’s desired outcomes i.e. satisfied customers. Organizations use performance appraisals for multiple purposes chiefly amongst them being developmental and administrative. This study sought to investigate perceptions held by employees towards the purposes or objectives of the system employed in their organization to assess their service interactions with customers, their perceptions of fairness of the system, and how such fairness relates to their satisfaction with the assessment outcomes. A survey approach was used to collect data and the instrument used was a self-administered questionnaire. There were 410 questionnaires distributed via email to employees working within service assurance call centres situated in Bloemfontein, Cape Town and Gauteng. A total of 117 questionnaires were returned by the respondents. Data collected was managed and analysed using the SPSS program. The findings of the study indicated that employees perceive the uses of assessing their service interactions with customers as both developmental and administrative, perceive fair outcomes and procedures used in determining the outcomes, they are satisfied with assessment outcomes, view the system used to assess their interactions as effective and trustworthy. The fairness of outcomes and procedural fairness variables were found to be strongly and positively related to satisfaction with assessment outcomes. Both fairness variables were found to have a unique contribution towards the prediction of the satisfaction with assessment outcomes variable. The main recommendation of the study is that management need to consider increasing fairness in the decisions involving employees’ performance as it has been found that such increase results in a positive increase on the employees’ satisfaction with outcomes generated from the assessment or evaluation of their service interactions with customers. / Thesis (MBA)-University of KwaZulu-Natal, Westville, 2010.

Communication by wireless technologies has seen a tremendous growth in the last decades. Mobile phone technology and wireless broadband solutions are rapidly replacing the last-hop wireline connectivity for telephones and Internet access.  Research has, however, shown that Internet traffic can experience a performance degradation over wireless compared to wired networks.  The inherent properties of radio communication lead to a higher degree of unreliability, compared to communication by wire or fiber.  This can result in an increased amount of transmission errors, packet loss, delay and delay variations, which in turn affect the performance of the main Internet transport protocols TCP and UDP.  This dissertation examines the cross-layer relationship between wireless transmission and the resulting performance on the transport layer. To this end, experimental evaluations of TCP and UDP over a wireless 4G downlink system proposal are performed.  The experiment results show, in a holistic scenario, that link-level adaptive modulation, channel prediction, fast persistent link retransmissions, and channel scheduling, enables the transport protocols TCP and UDP to perform well and utilize the wireless link efficiently.  Further, a novel approach is proposed where a modified TCP receiver can choose to accept packets that are corrupted by bit errors. Results from network emulation experiments indicate that by accepting and acknowledging even small amounts of corrupted data, a much higher throughput can be maintained compared to standard TCP.

The idea of utilizing multiple antennas (MIMO) has emerged as one of the significant breakthroughs in modern wireless communications. MIMO techniques can improve the spectral efficiency of wireless systems and provide significant throughput gains. As such, MIMO will be increasingly deployed in future wireless systems. On the other hand, in order to meet the increasing demand for high data rate multimedia wireless services, future wireless systems are evolving towards universal frequency reuse, where neighboring cells may utilize the same radio spectrum. As such, the performance of future wireless systems will be mainly limited by inter-cell interference (ICI). It has been shown that the throughput gains promised by conventional MIMO techniques degrade severely in multi-cell systems. This definitely attributes to the existence of the ICI. A lot of related work has been performed on the ICI mitigation or cancellation strategies, in multi-cell MIMO systems. Most of them assume that the channel and even data information is available at the collaborating base stations (BSs). Different from the previous work, we are looking into certain low-complexity codebook-based multi-cell multi-user MIMO strategies. For most of our work, we derive the statistics of the selected user's signal-to-interference-and-noise-ratio (SINR), which enable us to calculate the achieved sum-rate accurately and e ciently. With the derived sum-rate expressions, we evaluate and compare the sum-rate performance for several proposed low-complexity ICI-mitigation systems with various system parameters for single-user per-cell scheduling case. Furthermore, in order to fully exploit spatial multiplexing gain, we are considering multi-user per-cell scheduling case. Based on the assumption that all CSI including intra-cell and inter-cell channels are available at each BS, we rstly look into the centralized optimization approach. Typically, since the sum-rate maximization problem is mostly non-convex, it is generally di cult to obtain the globally optimum solution. Through certain approximation and relaxations, we successfully investigate an iterative optimization algorithm which exploits the second-order cone programming (SOCP) approach. From the simulation results, we will observe that the iterative option can provide near-optimum sum capacity, although only locally optimized. Afterwards, inspired by the successful application of Per-User Unitary Rate Control (PU2RC) scheme, we manage to extend it into dual-cell environment, with limited coordination between two cells. / Graduate

Intelligent Transportation Systems (ITS) are gaining momentum among researchers. ITS encompasses several technologies, including wireless communications, sensor networks, data and voice communication, real-time driving assistant systems, etc. These states of the art technologies are expected to pave the way for a plethora of vehicular network applications. In fact, recently we have witnessed a growing interest in Vehicular Networks from both the research community and industry. Several potential applications of Vehicular Networks are envisioned such as road safety and security, traffic monitoring and driving comfort, just to mention a few. It is critical that the existence of convenience or driving comfort services do not negatively affect the performance of safety services. In essence, the dissemination of safety services or the discovery of convenience applications requires the communication among service providers and service requesters through constrained bandwidth resources. Therefore, service discovery techniques for vehicular networks must efficiently use the available common resources. In this thesis, we focus on the design of bandwidth-efficient and scalable service discovery protocols for Vehicular Networks. Three types of service discovery architectures are introduced: infrastructure-less, infrastructure-based, and hybrid architectures. Our proposed algorithms are network layer based where service discovery messages are integrated into the routing messages for a lightweight discovery. Moreover, our protocols use the channel diversity for efficient service discovery. We describe our algorithms and discuss their implementation. Finally, we present the main results of the extensive set of simulation experiments that have been used in order to evaluate their performance.

Food is fundamental for humans to survive and vital for development. Food security is a major issue and sustaining it is a challenge for the countries of the world. With climate change and other environmental andsocial factors greatly influencing the current chances for world food security, it is of prime importance for countries to work towards achieving it. A major part of the poor and vulnerable section of people lives in the developing and poor countries with rampant food insecurity issues. To achieve the UN‟s Millennium Development goal of halving hunger by 2015, food security measures are implemented in poor and developing countries with the help of world organizations to alleviate poverty and hunger. This paper studies the situation in India, where poverty and hunger is a major block for the development progress. India has proven its authority in various fields with a fast developing economy. On the other hand, poverty and hunger prevail among almost half of the country‟s people. The country has taken various measures to attain food security and curb hunger among the poor. The major welfare measure in the country is the food distribution schemes implemented by the government. The performance among different states in the country varies due to various factors. The performances of the country as a whole and of the southern state of Tamil Nadu are taken into consideration for this paper. The paper will deal with the performance and related issues such as policies, administration, operations and social influences on the food distribution system in a comparison between Tamil Nadu and the rest of the country. Based on the official records on procurement and distribution of food grains as well as on literature studies on the food security situation in India and Tamil Nadu state, this paper suggests that there is a need to modify the mechanisms that constitute the distribution system, which can be learnt from Tamil Nadu state where the performance is better than the average for India as a whole. Even though Tamil Nadu faces similar problems asother States, the better performance of Tamil Nadu does not affect the food distribution system in the country. At the national level, the situation is worse with magnified problems of performance affecting the food distribution system.

Data Envelopment Analysis (DEA) assigns efficiency values to decision making units (DMU) in a given period by comparing the outputs with the inputs. In many applications, inputs and outputs of DMUs are monitored over time. There might be a time lag between the consumption of inputs and production of outputs. We develop approaches that aim to capture the time lag between the outputs and the inputs in assigning the efficiency values to DMUs. We present computational results on randomly generated problems as well as on an application to R&amp / D institutes of the Scientific and Technical Research Council of Turkey (T&Uuml / BiTAK).

Pushover analysis involves certain approximations and simplifications that some amount of variation is always expected to exist in seismic demand prediction of pushover analysis. In literature, some improved pushover procedures have been proposed to overcome the certain limitations of traditional pushover procedures. The effects and the accuracy of invariant lateral load patterns utilised in pushover analysis to predict the behavior imposed on the structure due to randomly selected individual ground motions causing elastic and various levels of nonlinear response were evaluated in this study. For this purpose, pushover analyses using various invariant lateral load patterns and Modal Pushover Analysis were performed on reinforced concrete and steel moment resisting frames covering a broad range of fundamental periods. Certain response parameters predicted by each pushover procedure were compared with the &#039 / exact&#039 / results obtained from nonlinear dynamic analysis. The primary observations from the study showed that the accuracy of the pushover results depends strongly on the load path, properties of the structure and the characteristics of the ground motion. Pushover analyses were performed by both DRAIN-2DX and SAP2000. Similar pushover results were obtained from the two different softwares employed in the study provided that similar approach is used in modeling the nonlinear properties of members as well as their structural features. The accuracy of approximate procedures utilised to estimate target displacement was also studied on frame structures. The accuracy of the predictions was observed to depend on the approximations involved in the theory of the procedures, structural properties and ground motion characteristics.

The purpose of this research was to investigate the implications of networked public management on the design, implementation, and utilization of federal performance measurement systems. A multiple, instrumental case study of four public health programs funded by CDC and implemented nationally through vertical and horizontal network structures was conducted. Cross-case findings suggest that the networked implementation structures for the four federal-level, public health programs have important implications for the design of the performance measurement systems. Specifically, the performance measurement systems were affected by four consequences of the implementation networks: the political influence of collaborative stakeholders; network variability; dependencies on voluntary, horizontal network partners to achieve outputs and outcomes; and jointly produced outcomes that compromise assigning agency-specific attribution and accountability. While these four factors did not deter the use of performance measurement by any of the programs, all had important consequences for the development and subsequent design of the performance measurement systems, including limiting the choice and types of measures, level of measurement, potential uses of the measures, and resources needed to implement and support the systems.