Text in English with abstracts in English, Afrikaans and isiXhosa / This thesis describes the development of a methodology to find inter tidal shipwrecks. The discussion revolves around finding a particular shipwreck – that of the Dutch slaver Meermin. The story of the revolt on the Meermin helps to focus the search and development of the methodology to find inter tidal shipwrecks as the Meermin was wrecked in this zone. The thesis contextualises the search and the story by discussing not only maritime archaeology in South Africa, but also looking at slave ship archaeology and the history of slavery at the Cape. One of the key techniques for finding shipwrecks is the use of magnetometers. The discussion defines the types of magnetometers available to archaeologists and how magnetometry was applied during the search for the Meermin. This inevitably includes an examination of the shipwrecks wrecked in the area of the Meermin episode as well as the way this region has changed over time. The results of the magnetometer searches (which included airborne, handheld and marine magnetometers) are discussed as well as the ground truthing of the results. The latter involved excavation and the development of excavation strategies, and excavation results are scrutinized. In the final analysis the search for the Meermin is further contextualised by considering the various impacts the project has had in other spheres. / Hierdie tesis beskryf die ontwikkeling van ‘n metodologie waarmee skeepswrakke in die inter-gety sone opgespoor kan word. Die Hollandse slaweskip, Meermin, is die fokus van die diskussie. Die storie van die slawe opstand op die Meermin help om die ontwikkeling en soektog na skeepswrakke in die inter-gety sone te verskerp, aangesien dit in hierdie sone was waarin die Meermin gestrand het. Die soektog en storie van die Meermin word gekontekstualiseer deur die bespreking van die ontwikkeling van maritieme argeologie in Suid Afrika, die argeologie van slawe skepe en ‘n kort geskiedenis van slawerny aan die Kaap. Magnetometers is een van die belangrikste tegnieke gebruik vir die opspoor van skeepswrakke. Die tipes magnetometers wat deur argeoloë gebruik word, word gedefinieër asook hoe magnetometers gedurende die soektog na die Meermin gebruik is. Daar word ook gekyk na die ander skepe wat in die area van die Meermin gestrand het en die veranderinge wat deur die jare in die streek plaasgevind het. Die resultate van die magnetometer soektogte (insluitend vliegtuig, draagbare en mariene magnetometers) word bespreek so wel as die opgrawings van die resultate. Hierdie opgrawings het noodwendig gelei tot die ontwikkeling van opgrawings tegnieke. Die resultate van die opgrawings word bespreek. Die finale analise kontekstualiseer die soektog na die Meermin met ‘n bepeinsing van die menige impakte wat die projek gehad het. / Le thisisi icacisa ngenkqubela kulwazi-nkqubo lokufumana iinqanawa ezaphuka phakathi kokuzala nokurhoxa kolwandle. Ingxoxo zimalunga nokufunyanwa kwenqanawa ethile eyaphukayo – kanye leyo yayithutha amakhoboka amaHolani i-Meermin. Ibali lovukelo kwi-Meermin liyasinceda siqwalasele uphando nenkqubela kulwazi-nkqubo lokufumana iinqanawa ezaphuka phakathi kokuzala nokurhoxa kolwandle njengoko i-Meermin yaqhekeka kanye kulo mmandla. Ithisisi le isicacisela kanye ngophando nembali ngokuxoxa hayi ngobunzululwazi ngezakudala emanzini eMzantsi Afrika nje kuphela, koko iphinde ijonge ngobunzululwazi ngezakudala kwinqanawa yokuthutha amakhoboka nembali yobukhoboka eKapa. Obunye bobuqili obuphambili ekufumaneni iinqanawa eziqhekekileyo kukusetyenziswa kwezixhobo zokulinganisa iintshukumo. Ingxoxo ibalula iindidi zezixhobo zokulinganisa iintshukumo ezisetyenziswa ziinzululwazi ngezakudala nendlela ekwasetyenziswa ngayo ukulinganiswa kwentshukumo ngethuba kuphandwa i-Meermin. Ngokuqhelekileyo oku kuquka ukucutyungulwa kweenqanawa ezaqhekekayo ziqhekeka kummandla wesehlo esisodwa se-Meermin kunye nendlela le ngingqi eguquke ngayo emveni koko. Iziphumo zophando ngezixhobo zokulinganisa iintshukumo (ziquka ezo zasesibhakabhakeni, ezibanjwa ngesandla nezasemanzini) ziyaxoxwa kunye neziphumo zenyani yenene. Le yokugqibela iquka ukwembiwa nenkqubela kwindlela zokomba, iziphumo zokomba nazo ziqwalaselwe. Kuye kwaphinda kwacaciswa kwintlahlela yokugqibela kuphando lwe-Meermin kuqwalaselwa iimpembelelo ezithile umsebenzi othe wangquzulena nazo nakwezinye iindawo. / Anthropology and Archaeology / M.A. (Archaeology)

Department of Ecology and Resource Management / MENVM

MENVSC / Department of Ecology and Resource Management / Solid waste management (SWM) has become an issue of increasing worldwide concern as urban populations continue to rise and consumption patterns change. The health and environmental effects associated with SWM are escalating, predominantly in the perspective of developing countries. The rise in rural-urban migration rates in developing countries has left local authorities overwhelmed and failing to cope with the increase in solid waste. This has led to a shift from conventional systems of solid waste management to contemporary systems such as community based solid waste management (CBSWM). Despite the shift, it seems local authorities in developing countries still fail to manage suburban waste effectively. This study investigated the performance of a CBSWM scheme in Nkulumane, a high-density suburb in Bulawayo. Both quantitative and qualitative data were collected, hence a mixed methods approach employed. The study incorporated systematic sampling and purposive sampling in the selection of research participants. Data was collected through qualitative questionnaires, semi structured interviews and field observations. Thematic content analysis and descriptive statistics from SPSS version 25 were used in data analysis. The study revealed that community members from Nkulumane had sound knowledge on what CBSWM entails, however the community members had negative attitude towards CBSWM and traditional notions on SWM had an influence of their perception of CBSWM concepts. The study also revealed that Bulawayo City Council had managed to create employment for the community through a CBSWM scheme. Furthermore, operating expenses of the city council had decreased over the years. The level of environmental awareness had improved in the study area as well. However, Bulawayo City Council has battled with community participation problems, financial constraints and inter-institutional infighting. This study provides a comprehensive report on the performance of the CBSWM scheme in Nkulumane high density suburb, Bulawayo, Zimbabwe. / NRF

Waste management is a global concern and landfill sites are facing a crisis of handling capacity. This is worsened by the fact that many consider landfilling as an environmentally responsible and cost-effective solution to waste disposal. Carnival City generates vast quantities of solid waste on a daily basis and most of it ends at the landfill, which it acknowledges that it’s a wastage of recoverable resources, hence its commitment of “zero-waste-to-landfills by 2022”. This study evaluated solid waste management practices at Carnival City Casino in Brakpan. Informed by an interpretive paradigm, qualitative methods including interviews, observations, photographs and document reviews were used to collect data. Based on abductive reasoning, the waste management hierarchy and the ISO 14001 standard were used as frameworks for recontextualising and presenting the collected data. The waste hierarchy sets out the preferred order of waste management practices, from the most favoured to the least preferred option. The effectiveness of current waste management practices is limited as Carnival City heavily depends on landfilling and implement waste minimisation, reuse, recycling and recovery on a small scale. Absence of a waste separation at source policy limits recycling activities significantly. The researcher noted the presence of some areas of conformity to South African legislation pertaining to waste management, international standards and Carnival City’s standard operating procedures, and some areas of good practice. The study showed that there is room for improving concerning Carnival City’s current waste management practices. It recommends that waste management training and awareness be undertaken on a continuous basis to improve current practices and ensure that more waste is diverted from landfill sites. Investment into waste to energy technologies should be considered to help Carnival City to meet Sun International’s commitment of “zero-waste-to-landfills by 2022”. Recycling must be maximised and its environmental and financial benefits be highlighted. The research recommends developing of a separation at source policy and its enforcement by the Environmental Committee as the absence of the documented procedures results in deviations from environmental objectives. Offenders who do not follow procedures should be duly punished. It also recommends that a disciplinary action and a fine be introduced for kitchens that will deviate from the policy. / Environmental Sciences / M. Sc. (Environmental Management)

No description available.

The research work critically analyzed the factors responsible for imprudent waste tyre management in South Africa. As an approach to determine the complexity of the problem, questionnaires were sent to one hundred and sixty (160) respondents in conjunction with interviews. Perusal of literature and interaction with industry involved in waste tyre processing to further gain knowledge of the problem and possible solutions that can be solicited to address the problem. Findings revealed that, lack of clear, focused legislation that guide the handling, disposal and processing of waste tyres remain the challenge. It is also deduced that recycling of waste tyres can provide economic benefits and opportunities. It is recommended that South Africa develop appropriate legislation that deals with handling, treatment and disposal of waste tyres, develop an incentive programme to set up initiatives as well as developing skilled and capacitated enforcement agency. / Environmental Sciences / M.A. (Environmental Management)

Text in English / The study focused on the characterisation and management of non-formal solid waste disposal sites in Harare, the capital city of the Republic of Zimbabwe. In many developing countries, increasing urbanisation surpasses the development of urban infrastructure and this has led to the proliferation of informal settlements, illegal dumping sites and uncontrolled vending in cities like Harare. The researcher investigated the prevalence of non-formal dumping sites in Harare, including the composition, locational attributes and internal linkages of solid waste. Practices regarding the management of non-formal solid waste disposal sites were examined and areas of good practice and conformity to international standards were complemented while recommendations and suggestions were made on areas that were found wanting. An integrated management system was recommended for the sustainable management of solid waste. To support this recommendation, management window of responsibilities (EMWR) model was created so that the Harare City Council can enhance stakeholder participation. The research results show that most residents used non-conventional ways to store waste, like mealie-meal bags and sacks, and this posed a danger to human health. It also emerged that the city of Harare has not updated some of its by-laws, some of which were enacted about 33 years ago while others remained drafts for decades. This made it difficult for the city to effectively implement them. / Environmental Sciences / M.Sc. (Environmental Management)

Submitted in fulfillment of the requirements for the Degree of Master of Technology Degree : Environmental Health, Durban University of Technology, Durban, South Africa, 2015. / Introduction Informal waste picking has both economic and environmental benefits, however there are many health risks associated with this activity. This cross sectional descriptive study assessed the respiratory health risks and dust (PM2.5) exposure among informal waste pickers operating at the New England landfill site in the Msunduzi Municipality. Data was collected from 102 informal waste pickers using a validated questionnaire adapted from the British Medical Research Council and American Thoracic Society. Our study population comprised of 66.4°/o women with a mean age of 36.7 years. Women reported greater use of safety shoes and gloves compared to men. Very few participants used dust masks or respirators. Results showed a high prevalence of chronic cough (57o/o), wheeze (51°/o) shortness of breath (31.6°/o) and cough with phlegm (29.0°/o) among all participants. Among those who reported having ever smoked, there was a significantly higher prevalence of cough with phlegm (45.2°/o p=0.02) and wheeze (73.1°/o, p= 0.05). Similarly, there was a bivariate association between current smoking and wheeze (p=0.02) and between ever smoked and wheeze {p< 0.05). A random sample of 28 waste pickers was chosen from the 102 participants for personal sampling. The levels and distribution of time weighted average to PM2.5 were calculated during an 8 hour working period. Average personal sampling levels of PM2.5 were very high compared to environmental levels. Personal sampling results showed a maximum exposure of 431 J.,Jg/m 3 and a mean of 187.4 J.,Jg/m 3 compared to a maximum level of 27.9 J.,Jg/m 3 and a mean of 16.5 J.,Jg/m 3 for environmental sampling. Mean personal sampling results significantly exceeded recommended eight hour time weighted average for South African National Standard for Occupational Exposure Limit (Republic of South Africa OHS ACT 85 of 1993), World Health Organisation and United State Environmental Protection Agency guidelines for PM2.5, while the environmental mean was within guidelines. This study showed that waste pickers are exposed to high levels of PM2.5 while working at the landfill site. Limited or no use of personal protective equipment increases risk of dust exposure and adverse respiratory effects. The relatively high prevalence of cough, shortness of breath and wheeze symptoms among these informal waste pickers may be linked to exposure to dust at the landfill site / PDF copy unavailable. please refer to hard copy for full text information / M

Context. One of the most controversial subjects in anaesthesia today is whether or not neuraxial anaesthesia is more efficient to general anaesthesia in high-risk patients undergoing noncardiac surgery. The cumulative results showed that the incidence of postoperative cardiovascular morbidity and mortality is similar, regardless of type of the anaesthesia. So, is relevant to answer the search question: what is the efficiency of the neuraxial anaesthesia compared with general anaesthesia for lower-limbs revascularization in elderly? Objective. It is to determine the efficiency of the neuraxial anaestheisa versus general anaesthesia for lower-limbs revascularization in elderly. Hypothesis. The hypothesis is that the neuraxial anaestesia is more efficient (OR 0.67) than general anaesthesia for lower-limbs revascularization in elderly. Design. Systematic review with meta-analyse of the original articles of the randomized controlled trials. Setting. Federal University of Alagoas, Maceió, AL. Sample. Original articles of the randomized controlled trials that compared two anaesthetic technique (neuraxial anaesthesia vs. general anaesthesia) in elderly submitted to lower-limbs revascularization surgery. The information was accessed from EMBASE, LILACS, MEDLINE, CINHAL and ISI WEB OF SCIENCE. Main outcomes. Primary outcomes: Mortality, cerebral infarction, myocardial infarction, paralysis and postoperative lower limb amputation rate. Secondary outcomes: Duration of hospital stay, postoperative cognitive dysfunction, postoperative wound infection, other postoperative infections, neuraxial haematoma and complications in the anaesthetic recovery room. Complementary data: internal validity, external validity and statistical analyze. Statistical methods. For data analysis the odds ratio were used in the randon effect model with corresponding 95% confidence interval. / Contexto. A controvérsia atual é saber se a anestesia neuroaxial é mais eficiente do que a anestesia geral em pacientes de alto risco submetidos à cirurgia não cardíaca. Os resultados acumulados mostram que a incidência pós-operatória de mortalidade e morbidade cardiovascular é similar independentemente da técnica anestésica. Assim, é relevante responder a pergunta de pesquisa: qual a eficiência da anestesia neuroaxial comparada à anestesia geral para a revascularização dos membros inferiores em idosos? Objetivo. Determinar a eficiência da anestesia neuroaxial comparada à anestesia geral para a revascularização dos membros inferiores em idosos. Hipótese. A hipótese é que a anestesia neuroaxial é mais eficiente (OR 0,67) quando comparada à anestesia geral para a revascularização de membros inferiores em idosos. Tipo de estudo. Revisão sistemática com metanálise de artigos originais de ensaios clínicos aleatórios. Local. Universidade Federal de Alagoas, Maceió, AL. Amostra. Artigos originais de ensaios clínicos aleatórios que comparam duas técnicas anestésicas (anestesia neuroaxial vs. anestesia geral) em idosos submetidos à cirurgia de revascularização dos membros inferiores. Fontes de informação utilizadas: EMBASE, LILACS, MEDLINE, CINHAL e ISI WEB OF SCIENCE. Variáveis. Variáveis primárias: Mortalidade, infarto cerebral, infarto cardíaco, paralisia muscular e taxa pós-operatória de amputação de membro inferior. Variáveis secundárias: Tempo de duração da internação hospitalar, disfunção cognitiva pós-operatória, infecção pós-operatória, outras infecções pósoperatórias, hematoma neuroaxial e complicações na sala de recuperação pósanestésica. Dados complementares: itens da validade interna, itens da validade externa e análise estatística. Método estatístico. A metanálise foi apresentada com o cálculo das variáveis realizado pela odds ratio no modelo de efeito randômico, com respectivo intervalo de confiança de 95%.

The research work critically analyzed the factors responsible for imprudent waste tyre management in South Africa. As an approach to determine the complexity of the problem, questionnaires were sent to one hundred and sixty (160) respondents in conjunction with interviews. Perusal of literature and interaction with industry involved in waste tyre processing to further gain knowledge of the problem and possible solutions that can be solicited to address the problem. Findings revealed that, lack of clear, focused legislation that guide the handling, disposal and processing of waste tyres remain the challenge. It is also deduced that recycling of waste tyres can provide economic benefits and opportunities. It is recommended that South Africa develop appropriate legislation that deals with handling, treatment and disposal of waste tyres, develop an incentive programme to set up initiatives as well as developing skilled and capacitated enforcement agency. / Environmental Sciences / M.A. (Environmental Management)