Cash transfers and poverty reduction in South Africa: a case study of old age pensions
- Authors: Kasere, Gayle Farai
- Date: 2012
- Subjects: Poverty -- Economic aspects -- South Africa -- Eastern Cape Poverty -- Grahamstown -- Eastern Cape Social security -- South Africa Pensions -- South Africa
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3321 , http://hdl.handle.net/10962/d1003109
- Description: Social assistance in the form of cash grants is a large and fiscally costly component of anti-poverty policy in South Africa. A critical question arises: Are the grants effective tools for reducing poverty in South Africa and, moreover, how significant is their impact on poverty? As a measure of reducing poverty, the government has expanded the social grants system since the advent of the new democracy in 1994. The country's social grant system is quite comprehensive and it is intended to cover vulnerable individuals over their life course from childhood to adulthood and into old age. Policy discourse surrounding the grants centres on the sustainability of the system and its implications for socio-economic development and poverty alleviation. It is therefore important that the significance of grants is identified and assessed particularly in relation to very poor households. This dissertation focuses specifically on one particular grant, namely, the old age pension. It does so in the context of the sustainable livelihoods conceptual framework and the history of the social grant system in South Africa. Statistical data collected by the South African government as well as more localised evidence gathered in the Eastern Cape town of Grahamstown is used to ascertain the significance of old age pensions for poverty reduction. While there is some evidence to suggest that pensions contribute to poverty reduction, this does not translate into poverty alleviation. In fact, there is some unevenness in the impact of pensions on poverty. In this regard, the decision-making structures in poor households regularly influence the way pension money is allocated and used within households. Grant money is normally shared in extended households, such that the pension does not simply benefit the recipient but the recipient's household as a whole. Although there is cause for concern regarding the propensity of social grants to affect people's behaviour negatively, there is a case to be made for retaining grants as an important, though not the only, form of anti-poverty strategy. This highlights the need for continued research on the social grant system and pensions more specifically.
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- Date Issued: 2012
Developing a form-process framework to describe the functioning of semi-arid alluvial fans in the Baviaanskloof Valley, South Africa
- Authors: Bobbins, Kerry Leigh
- Date: 2012
- Subjects: Alluvial fans -- Research -- South Africa Sedimentation and deposition -- Research -- South Africa Geomorphology -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4825 , http://hdl.handle.net/10962/d1005500
- Description: The Baviaanskloof catchment is a semi-arid catchment located in the Cape Fold Mountains of South Africa. Little is known about the functioning of the complicated Baviaanskloof fluvial system and the role alluvial fans in the fluvial landscape. This thesis will contribute to field of geomorphology and, more specifically, to the field of fan morphometry by producing a standalone fan framework outlining methods to investigate the influence of external and internal control variables on alluvial fans. In this thesis, outcomes of the applied framework and case study are used to develop fan restoration guidelines for the Baviaanskloof Valley. The framework incorporates external and internal fan control variables at a valley-wide and local fan scale. External control variables include accommodation space, base-level change, and drainage basin inputs. Internal control variables include fan style, morphometry and fan channels. In order to apply the framework, fan morphometry data was required. This data was collected by creating a spatial plan of fans and basins in the valley. Outcomes of the applied framework include; an understanding of baselevel change on fans, relationships between fan basin characteristics and the fan surface and insight into fan channel processes. Results of the applied framework are investigated further using bivariate (correlation matrix) and multivariate (principle component analysis and regression analysis) analysis techniques. Significant relationships identified are: drainage basin area versus fan area, fan area and fan slope and drainage basin ruggedness and basin size. The primary outcomes of this thesis include an alluvial fan form-process framework, key considerations to be included in alluvial fan restoration projects and fan restoration guidelines. Contributions of this thesis to broader alluvial fan morphology science includes new insights into general fan literature by compiling a form-process alluvial fan classification framework to identify external and internal fan control variables and identify fan form. Additions have been made to Clarke’s (2010) evolutionary stages to describe stages 4 and 5 of fan evolution that has been adapted to describe fan evolution and differentiate between stages of mature fan evolution. This thesis has also contributed to the study of alluvial fans in South Africa, particularly in the Baviaanskloof Valley. The layout of the procedural guidelines and key considerations for an alluvial fan project provides a guide for rapid fan assessment for maximum cost and time benefits for stakeholders.
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- Date Issued: 2012
GPF : a framework for general packet classification on GPU co-processors
- Authors: Nottingham, Alastair
- Date: 2012
- Subjects: Graphics processing units , Coprocessors , Computer network protocols , Computer networks -- Security measures , NVIDIA Corporation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4661 , http://hdl.handle.net/10962/d1006662 , Graphics processing units , Coprocessors , Computer network protocols , Computer networks -- Security measures , NVIDIA Corporation
- Description: This thesis explores the design and experimental implementation of GPF, a novel protocol-independent, multi-match packet classification framework. This framework is targeted and optimised for flexible, efficient execution on NVIDIA GPU platforms through the CUDA API, but should not be difficult to port to other platforms, such as OpenCL, in the future. GPF was conceived and developed in order to accelerate classification of large packet capture files, such as those collected by Network Telescopes. It uses a multiphase SIMD classification process which exploits both the parallelism of packet sets and the redundancy in filter programs, in order to classify packet captures against multiple filters at extremely high rates. The resultant framework - comprised of classification, compilation and buffering components - efficiently leverages GPU resources to classify arbitrary protocols, and return multiple filter results for each packet. The classification functions described were verified and evaluated by testing an experimental prototype implementation against several filter programs, of varying complexity, on devices from three GPU platform generations. In addition to the significant speedup achieved in processing results, analysis indicates that the prototype classification functions perform predictably, and scale linearly with respect to both packet count and filter complexity. Furthermore, classification throughput (packets/s) remained essentially constant regardless of the underlying packet data, and thus the effective data rate when classifying a particular filter was heavily influenced by the average size of packets in the processed capture. For example: in the trivial case of classifying all IPv4 packets ranging in size from 70 bytes to 1KB, the observed data rate achieved by the GPU classification kernels ranged from 60Gbps to 900Gbps on a GTX 275, and from 220Gbps to 3.3Tbps on a GTX 480. In the less trivial case of identifying all ARP, TCP, UDP and ICMP packets for both IPv4 and IPv6 protocols, the effective data rates ranged from 15Gbps to 220Gbps (GTX 275), and from 50Gbps to 740Gbps (GTX 480), for 70B and 1KB packets respectively. , LaTeX with hyperref package
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- Date Issued: 2012