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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

A critical analysis of the international terms of shipment in dry-bulk exports from the Port of Richards Bay.

January 2003 (has links)
Approximately 98 % of South African exports are conveyed by sea. The volume of South Africa's sea trade represents approximately 3,5 percent of world seaborne trade in tonnage terms, a performance that placed the country on the map of international maritime nations. The major portion of South Africa's dry-bulk exports is shipped from the port of Richards Bay. Richards Bay is the seventh largest world port in terms of cargo volumes, and handles in excess of 80 million tons per annum. This represents approximately 57 % of all South African seaborne trade by volume. The greater portion of South African seaborne trade, especially on the export side consists of shipments of primary (raw) products or beneficiated primary products, and accounts for approximately 140 million tons of all cargoes. The export of primary products or commodities is a vital part of the South African economy and generates a substantial amount of the country's foreign exchange. This dissertation concludes that shipment on FOB terms continues to command the lion's share of all export consignments handled in the port. In fact from the more than 78 million tons of cargo covered in the survey, more than 64 million is shipped on FOB terms, which constitute in cargo volumes approximately 82% of all exported commodities from the Port of Richards Bay. The high incidence of shipments on FOB terms leaves the final arrangement of shipping in the hands of foreign buyers. This represents a substantial loss of revenue in invisible earnings for the country's service account of the balance of payments. / Thesis (M.Com.)-University of Natal, Durban, 2003.
12

Richards Bay zircon.

Pietersen, Kevin John. January 1992 (has links)
Zircon from the zircon concentrate of Richards Bay Minerals was investigated with a view to understanding the morphology and provenance. The obsevations were applied to the reduction of uranium, thorium and other trace elements in the heavy mineral placer deposits. It is evident from differences in morphology, optical characteristics, cathodoluminescence, inclusion types and trace element analyses that the zircon is derived from numerous parent rocks. Rare earth element modelling reveals several possible parent rocks including rhyolites, granites, syenites, pegmatites and carbonatites. Fission track U mapping of individual zircons indicated an enrichment of U in the rims and grain terminations. The U maps were used to devise and test several methods, including abrasion and partial dissolution, to reduce the combined U and Th concentration from 450-563ppm to below 400ppm. The effect of magnetic cleaning, density separation and size classification of the zircon concentrate on the U +Th concentration was found to be negligible. Air abrasion and HF acid dissolution successfully reduced the U +Th concentrations to between 332 and 383ppm. The contribution of trace elements from inclusions, surface pit fillings and coatings, and foreign minerals within the zircon concentrate were evaluated by by scanning electron microscope identification. / Thesis (M.Sc.)-University of Natal, Durban, 1992.
13

Soil moisture change due to variable water table

Kamat, Madhusudan Sunil 27 May 2016 (has links)
The thesis numerically models and investigates the effect of a variable water table on the soil moisture content. The modelling is done using COMSOL and Richards' equation. The temporal variation plots can be used to find the capillarity of the soil and its impact on other phenomenon such as vapor intrusion and infiltration.
14

The critical theories of Dr. I.A. Richards

Dhavale, V. N. January 1949 (has links)
No description available.
15

Avaliação de ameaça por escorregamentos de encostas na região leste de Cuba

Llera Cotarelo, Annette 16 September 2015 (has links)
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Civil e Ambiental, 2015. / Submitted by Fernanda Percia França (fernandafranca@bce.unb.br) on 2016-06-20T17:30:10Z No. of bitstreams: 1 2015_AnnetteLleraCotarelo.pdf: 37859877 bytes, checksum: 00fae7abf9e0b7388a39208521409a93 (MD5) / Approved for entry into archive by Raquel Viana(raquelviana@bce.unb.br) on 2016-07-21T18:58:40Z (GMT) No. of bitstreams: 1 2015_AnnetteLleraCotarelo.pdf: 37859877 bytes, checksum: 00fae7abf9e0b7388a39208521409a93 (MD5) / Made available in DSpace on 2016-07-21T18:58:40Z (GMT). No. of bitstreams: 1 2015_AnnetteLleraCotarelo.pdf: 37859877 bytes, checksum: 00fae7abf9e0b7388a39208521409a93 (MD5) / No presente estudo, foi aplicado em uma região tropical e montanhosa de Cuba, uma metodologia baseada em um modelode previsão da iniciação de fluxo de detritos (Papa et al., 2011), com base na solução analítica da equação de Richards válida na hipótese de uma infiltração vertical (Iverson, 2000). Este modelo é baseado em um sistema capaz de alertar a ocorrência de fluxos de detritos através das simulações de estabilidade feitas previamente, para qualquer combinação possível de ocorrência de precipitações em termos de intensidade e duração das chuvas que podem gerar ou não fluxos de detritos na região analisada. Estas simulações levam em consideração uma precipitação antecedente cujos efeitos são calculados pela hipótese de condições de estado estacionário (Montgomery e Dietrich, 1994). Com esta metodologia podem ser identificados um conjunto de limiares críticos de precipitações, cada um deles correspondente ao nível fixo de ameaça de fluxo de detritos, que podem ser analisados em termos de porcentagem de células das encostas com probabilidade de falha ou em volumes aproximados de solo espalhado pela ocorrência de fluxo de detritos. Esta metodologia de simulação é extremamente simplificada, exigindo um curto período de tempo utilizado no processamento computacional e um conjunto limitado de insumos básicos. / In thecurrentstudy, a methodologyisapplied for thecalculations of hazard based on the prediction of the start of debris flows (Papa et al. 2011) on a mountainous and tropical region in the West of Cuba. The methodology is based on the analytic solution of the Richards’ equation, valid for a case of vertical infiltration (Iverson, 2000). This is a tool able to alert about the initiation of debris flows through simulations previously performed in slope stability. These simulations are conducted for any possible combination of occurrence of rainfalls- in terms of intensity and duration of the precipitations- that can or cannot generate debris flows in the region of study. With this methodology, it is possible to identify with anticipation a series of critical thresholds of rainfall, each corresponding to a fixed level of hazard of occurrence of debris flow. These thresholds can be analyzed in terms of percentage of cells with probabilities of braking or in approximate volume of soil displaced by the occurrence of debris flow. The methodology of simulation is greatly simplified, requiring a short period of time utilized in the computational process and a limited set of basic inputs.
16

The development and evaluation of a career guidance centre for historically disadvantaged learners in Zululand, South Africa

Crossland, Lynn-Donné. January 2006 (has links)
Submitted in partial fulfilment of the requirements for the Degree of Master of Arts (Counselling Psychology) at the University of Zululand, 2006. / The problem of career development in disadvantaged communities in South Africa is a product of historical discriminatory practices that have resulted in large numbers of young people not having access to appropriate career guidance services. As a solution to mass career guidance needs, a non-profit, self-help career guidance program serves as a supplement to curriculum based school programs and provides people with the opportunity to access career guidance services in an empowering environment. This case study qualitatively describes the development and evaluation of a career guidance centre as a resource for large numbers of learners, educators and unemployed youth. Specifically, the role that the hands-on permanent career exhibition plays in a self-help career choice model is discussed, together with the subjective experience of the centre by a number of people who used the services provided by the Zululand Career Centre in Richards Bay, South Africa. A logic model provides a view of the resources, influencing factors, implementation activities and outputs that make up the development of the centre. The design of the career centre embodies several relevant psychological theories and is essentially a self-help exhibition-led process. Its development provided an opportunity for the innovative application of existing trait and type, life-span, constructivist, social learning, decision-making and socio-economic approaches within the South African context. The life-span and decision-making approaches provided the theoretical background for the problem-solving exploration processes used in the centre, while the trait and factor theories provided techniques for self-knowledge acquisition and career information classification. Social learning theory provided insight into the pivotal role the staff members of the centre would have to play in the learning processes, while the constructivist theories led to an understanding that users of the centre would be able to construct their knowledge of careers from their experiences with the centre displays and their own lived experiences. The importance of up-to-date, contextually relevant information was highlighted by the socio-economic approaches. The centre provided insights into how exhibition-led learning is able to assist a large number of people to access career and labour market information and actively participate in the career decision-making process. / National Research Foundation
17

A socio-economic and spatial investigation into the health implications of air pollution in Richards Bay, KwaZulu-Natal, South Africa.

Jaggernath, Jyotikumarie. January 2013 (has links)
There is increasing recognition of the links between air pollution and human health. Epidemiological studies have shown that there are numerous air pollutants that are associated with indoor energy use and with the production processes of industries, and most represent some sort of health implication. However, in-depth and fundamental knowledge of the health impact relationship of most pollutants is limited. This research evaluates the socio-economic and spatial aspects of the health implications of air pollution in Richards Bay (located 200 km north of Durban), KwaZulu-Natal. The research explores community perceptions and complaints relating to human health impacts emanating from air pollution in Richards Bay. The research is informed by a multi-conceptual framework (political economy incorporating political ecology, place perspectives and environmental justice) which influenced the methods chosen in conducting the research. Standard quantitative and qualitative methods were employed in the study to generate data relating to the research objectives. The process of triangulation which is the use of multiple methods that cuts across the qualitativequantitative divide was used. The various sources of information validate and clarify data by deepening and widening an understanding of the main issues under examination. The research was implemented in various communities in Richards Bay that reflect socioeconomic differences, which contributes significantly to ascertain whether health impacts are differentially experienced by different socio-economic groups. Furthermore, the research cross-tabulated experiences, perceptions and coping strategies of different socio-economic groups in the area, especially in relation to upper, middle and lower income clusters. The spatial aspect of the research (mapping of key social and health variables) is a major contribution of this research, which draws from the field of medical geography. Information on the main residential areas was illicitied from documents providing background details on Richards Bay. A purposive sampling approach was adopted to identify the seven communities, namely, Alton, Aquadene/ Brackenham, Arboretum, Meer-en-See, Empangeni Rail, Nseleni and Umhlathuze. Simple random point sampling was used to identify the households within the communities. The number of households in each community was determined using proportionate sampling. Four hundred and seventy nine housholds (479) were interviewed which was deemed to be a statistically relevant sampling size at a 95% confidence level. The study findings indicate that the lower income areas (Nseleni, Empangeni Rail and Umhlathuze) and the middle income areas (Aquadene/ Brackenham and Arboretum) have a more youthful population with a significant number being children, while the upper income areas (Alton and Meer en See) have a more elderly population. A similar trend was also found in relation to household size. There are clearly major variations in household income and employment types in Richards Bay, linked in part to the geographical location of communities based on economic and racial groups. Lower earning respondents were located mostly in the lower status areas which were classified as predominantly African populated areas as per the historical race classification and apartheid segregated areas. More than half of the respondents indicated that industrial smoke was the cause of their present health conditions. Other stated reasons were wide ranging and therefore there was no discernible pattern that emerged in relation to the causes for poor health experienced by the affected household member. However, the data did show that more respondents living in middle/ upper income areas identified causes. Reported health conditions include allergies (30.9%), coughing (29.8%), wheezing (25.5%), chest pains (18.4%) and asthmatic bronchitis/ asthma (17.7%). With regards to health care, the findings from the study show that the economically better off communities (Alton, Aquadene/ Brackenham, Arboretum and Meer en See) used the private, more expensive health care sector while generally households in lower income areas tend to rely on public or traditional health care facilities. An interesting finding was that most respondents rate their general health status as either excellent, good (more respondents from the middle/ upper income areas than the lower income areas) or satisfactory (more respondents from Umhlathuze). A large majority of the respondents reported air pollution as the main problem that is associated with industries in Richards Bay while the health impacts of pollutants from the industries manufacturing processes was the second main cause. The areas deemed to be the most polluted were generally in or in close proximity to the industrial area or the port area. Lower income areas tendered to be most polluted, according to respondents residing in these areas or who lived in similar low income areas. The majority of respondents were found to be living in dwellings/ households made from dwellings constructed with brick and asbestos, brick and zinc, stone and other traditional materials which is indicative of housing in the poorer communities who live in informal dwellings/ households and may be a causal contributing factor of the poor health status of these communities. The participatory mapping exercise conducted during the focus group discussion revealed that participants identified the industrial areas (including the port and surrounds) as the most polluted areas. Areas outside Richards Bay were considered to be the least polluted areas. The research findings indicate that there are a complex mix of socio-economic, environmental and spatial dynamics that influence air pollution and health impacts. Thus, health issues in the context of widespread air pollution concerns are linked to social, political and environmental aspects that require urgent attention. Air pollution and health impacts remain major concerns in many parts of the world, especially in areas of high levels of industrial development such as Richards Bay. The results of this research, therefore supports the findings of other researchers who reveal that communities/ neighborhoods of lower income status are most likely to bear the brunt of negative impacts and that air pollution from indoor uses of energy, behavioral factors such as cigarette smoking and industrial processes contribute to an individual’s/ community’s quality of life. / Thesis (Ph.D.)-University of KwaZulu-Natal, Durban, 2013.
18

Chemical pollution arising from heavy inorganic industries in Richards Bay - an assessment.

January 2004 (has links)
The industrial port of Richards Bay on the eastern seaboard of KwaZulu-Natal, South Africa has undergone rapid growth over the last 25 years. This industrial growth has inevitably led to an increase in the anthropogenic pollutant inputs in the area. However, the degree of this contamination has not previously been assessed not been accompanied by an awareness of its environmental impacts. This project serves to assess the current environmental situation of the area and provide background levels against which the environmental impacts of further growth in the area can be assessed. The main pollution point sources in the area were identified as a pulp and paper plant, a sulfuric acid/fertiliser plant and aluminium smelters. The chemical and physical processes involved within these industries were identified and discussed in detail. The common inorganic pollutants emitted by these industries were identifies as trace metals, sulfur dioxide, NOx gases and fluoride. It was these pollutants that therefore became the focus of this study. Reservoirs within Richards Bay that may become sinks for contamination were identified and water, sediment and soil samples were taken from these reservoirs. The samples were analysed for trace metal contamination, pH, alkalinity and fluoride levels. Analysis of the acidity and alkalinity of water, sediment and soils samples demonstrated that there is presently no long-term acidification of the environment in Richards Bay. The only samples that showed increased acidity were the soils taken from the roadside sites immediately outside the industries. This lack of overall acidification indicates that, at present, there are no detrimental effects of acidic emissions on the hydrosphere and geosphere. Only cursory investigations were conducted into the fluoride levels found in water samples. None of the samples analysed demonstrated detectable amounts of fluoride present. Comprehensive trace metal analyses were performed on the water, sediment and soil samples through the use of ICP-AES. Levels obtained were compared with levels from samples taken from relatively uncontaminated background sites. Trace metal analysis indicated contamination of the freshwater reservoirs when compared with the background, while the soils and saltwater reservoirs remain largely uncontaminated. However, the contaminated areas did not show levels greater than quality guideline concentrations. Further studies should be conducted with regards to the trace metal contamination of the biosphere and the bioavailability of the contaminants already present in the waters, sediments and soils. More detailed investigations should also be conducted into the levels of atmospheric pollutants and fluoride levels in all reservoirs. / Thesis (M.Sc.) - University of KwaZulu-Natal, Pietermaritzburg, 2004.
19

Public relations models and corporate social responsibility in the mining sector in Richards Bay, South Africa

Dlamini, Mlandvo Africa January 2016 (has links)
Thesis (MTech (Public Relations Management))--Cape Peninsula University of Technology, 2016. / The history of public relations include facets of “publicity” and “press agentry,” and has matured beyond these narrow, tactical functions, rising to accept positioning as strategic communications which can drive corporate social responsibility decision-making that resonate credibly with community stakeholder. The study explored public relations models of communication within stakeholder engagement to establish corporate social responsibility projects in the mining sector in Richards Bay, South Africa. The stakeholder engagement process depends greatly on principles outlined in the King Reports, which includes a stakeholder ‘inclusive approach’ and ethical guidelines for ‘governing stakeholder relationships’ and emphasises ‘sustainable development’. Furthermore, a socially responsibility business integrates the economic, legal, ethical and discretionary obligation of business to society and further recognizes its place in the broader community. Although qualitative research design was chosen for this study, the research used purposive sampling to select individuals and groups for data collection on the stakeholder communication experience. Six Individual in-depth interviews and one focus group interview were conducted with the organisation’s Communities and Corporate Relations team and the community leaders. The research reports that the corporate social responsibility stakeholder engagement process has five stages (consultation, engagement, agreement, decision making and feedback) and there is an evaluation process on community development projects set by the organisation. Consequently, the organisation and the communities both benefit from the corporate social responsibility projects. Additionally, the analysis shows that the model used for stakeholder engagement within corporate social responsibility is the mixed-motive model of public relations. Hence, the relationship between the organisation and its host communities is established and maintained, as well as the social licence to operate and reputation is enhanced. Therefore the research concludes that a public relations’ mixed-motive model of communication is best suited for stakeholder engagement in order to establish corporate social responsibility projects in the host communities that can enhance favourable organisation-community relationships. The model intends to achieve equilibrium between the organisation and the community stakeholder. However, further research is recommended into the development of a new African public relations model of communication that encompasses the concept of ‘Ubuntu’ where the community leader is the final decision maker in consultation with the traditional council.
20

An evaluation of an HIV and AIDS management system (HAMS) in a Richards Bay company, KwaZulu-Natal : a case study

Odetokun, Joseph 03 September 2012 (has links)
Dissertation submitted in fulfilment of the requirements for the Degree in Masters of Technology: Nursing, Durban University of Technology, 2012. / In South Africa, HIV and AIDS workplace programmes have been implemented for more than two decades without any audited and certifiable standards. In 2007, the South African National Standard launched South African National Standard (SANS 16001) 16001 to assist, encourage and support companies to implement minimum standards for HAMS. Companies are now expected to use this standard to improve HIV and AIDS Management System. It therefore, becomes imperative for companies to establish workplace HAMS in line with the set standard. To determine to what extent the company‟s HAMS has been aligned to the SANS 16001, an evaluation of the current management system in relation to the new SANS 16001 system is needed. Aim of the study The aim of the study was to evaluate the implementation of the HIV and AIDS Management System in a Richards Bay Company. Methodology A single case study using a quantitative research design was used to evaluate HAMS in a Richards Bay Company. The sample consisted of all consenting participants who were selected from key position holders in accordance with the requirements of SANS 16001: 2007 and the general workers. These key position holders were comprised of senior managers, middle managers and those employees who play an important role in implementing HAMS. Two different sets of questionnaires were used to collect data. One questionnaire was used to collect data from the managers because they were key role players in HAMS. The second questionnaire was used to collect data from the general workforce. The data from the questionnaire was captured and subsequently analysed using the version 9 of SPSS. Results There was evidence that the company was committed to continuous improvement regarding HIV and AIDS management as indicated by both key position holders and the general workforce.

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