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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.
31

The fish fauna of Lobster Bay, Cape D'Aguilar, Hong Kong /

Leung, Wai-yin, Albert. January 1994 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1995. / Includes bibliographical references (leaf 152-169).
32

Marketing architectural services : the role of the internet in marketing architectural services in the Western Cape

Grosskurth, Lisa Kathrin January 2008 (has links)
Thesis (MTech (Marketing Management))--Cape Peninsula University of Technology, 2008 / The research study provides an overview of the deployment of marketing by architectural practices in the Western Cape. It furthermore illustrates how the Internet is being utilised and establishes the motivations behind Web presence or its lack thereof. In recent years, an increasingly competitive landscape in the service industry, transformation in consumer buying behaviour, as well as deregulations in the professional service environment, such as the relaxation of advertising bans, make marketing an increasingly important competitive tool for architectural service providers in South Africa. However, due to the notable status and previous restrictions associated with the profession, many architectural practices are still reluctant to engage in marketing activities to promote their firms, remaining largely reactive and preserving a myopic view of marketing. In particular the use of the Internet is deemed to be a less required facet in the application of the marketing mix in this industry, which can mainly be attributed to the service provider’s lack of time and skill in this area of expertise. However, the literature suggests that the Internet can increase the opportunity for differentiation within the professional service environment, and from the marketer’s perspective, there is a considerable potential in the future profitability of marketing and Internet developments for this industry sector. Moreover, the trend that more consumers are adopting the Internet as a primary source for information emphasises the importance for architectural practices to adopt a holistic marketing approach that includes the Internet. The study revealed that there is generally a positive sentiment towards marketing, and the adoption of a Website in particular. Overall, however, most respondents seem to lack the understanding that a Website’s relative contribution to the service product and marketing success is determined by its role in the overall strategic direction of their business. A more focused marketing approach could result in a greater competitive advantage in an industry that is characterised by very low levels of differentiation. Due to the fact that professional service providers still tend to be reluctant to engage in marketing activities, it is recommended that marketing and Internet professionals start developing industry related offerings, taking into account above mentioned considerations, to proactively approach architectural practices. Furthermore, industry specific education on the benefits of marketing and the Internet to the architectural service industry, facilitated by governing bodies, marketing and IT professionals, could assist in shifting negative perceptions and bringing the marketing and architectural industry closer together, thereby encouraging mutually beneficial business relationships
33

Throughput of UWC students who did at least one semester of third-year statistics

Latief, Abduraghiem January 2005 (has links)
Magister Scientiae - MSc / This study explored the completion rates (the number of years a student takes to complete a degree) of graduates at the University of the Western Cape. Differences between students who finished their studies in the prescribed time of three years and those who took longer than the prescribed time was highlighted. / South Africa
34

The empowerment of women in water supply and sanitation projects in the rural Eastern Cape Province

Duncker, Louisa Christina 17 June 2005 (has links)
The issues concerning women and their participation (or rather lack thereof) in the development process have been increasingly examined over the last few decades. The interpretation of women's roles and gender relations, especially in water supply and sanitation projects, have been marked by shifting positions and changing political priorities over the last few decades. This study contributes to the knowledge regarding issues surrounding the roles and equality of women and men in water supply and sanitation projects in the Eastern Cape Province. It provides a background to the origins and development of gender and gender mainstreaming in the developing world in relation to the changing roles and responsibilities of women in water supply and sanitation projects. The roles and responsibilities of women, men and children are closely interlinked with their cultural perceptions, the way they grow up and the way they are brought up within their cultural environment and relationships with people close to them. The key to understanding how development work affects women, men, girls and boys, is in grasping the concept of gender. The term "gender" refers to those characteristics of women and men that are socially determined. This dissertation discusses gender-awareness approaches in development projects such as water supply and sanitation and the effect these projects have had to date on the empowerment, position and roles of women. The research in the Eastern Cape Province for this study is one of only a few case studies which could be identified in South Africa. This research and the case studies illustrate that development in South Africa needs to be made gender aware and gender sensitive, and that the mainstreaming of gender in South Africa is a long way behind the rest of the developing world. / Dissertation (MA (Antropology))--University of Pretoria, 2006. / Anthropology and Archaeology / unrestricted
35

Aspects of the biology of the infaunal bivalve Mollusc Solen cylindraceus (Hanley) in the Kariega estuary

De Villiers, Casper Johannes January 1990 (has links)
Solen cylindraceus is an infaunal filter-feeding bivalve inhabiting the intertidal mud banks of many southern African estuaries. It is particularly abundant in the Kariega estuary (33°41'S; 26°42'E) where it reaches densities of 400m⁻² (192g shell-free dry wt. m⁻²). The Kariega is a permanently open, marine dominated estuary about 18km in length, and S. cylindraceus is most abundant in its middle and upper reaches. Some physical characteristics of the estuary (temperature, salinity, sediment and water turbidity) are described, and the possible role of these factors in determining the density and distribution of S. cylindraceus within the Kariega estuary, is discussed. The structure of the alimentary system, gills and labial palps of S. cylintfraceus is described, all of which showed no major variation from the "typical" eulamellibranchiate form. Solen cylintfraceus was found to be a euryhaline osmoconformer with a salinity tolerance range of 15-65%. When animals were removed from their burrows, osmotic equilibration of the haemolymph was rapid (1-2 hours). By contrast, in animals left undisturbed in their burrows, osmotic equilibration was retarded (72-204 hours). It is suggested that the observed decrease in the rate of change of haemolymph osmolarity for animals in their burrows is linked to the stability of the interstitial salinity. A temperature tolerance range of 5-44°C was determined for S. cylintfraceus (in situ), in which prolonged exposure to 5°C and 40-45°C (12-36 hours respectively) resulted in a decreased burrowing ability, coma and death. Animal burrowing responses were not affected by temperatures in the range 15-35°C. Field experiments were carried out over several tidal cycles, in which the measurement of crystalline style volume was used as a means of assessing extracellular digestive activity. No major variation in style volume was recorded and it appeared that S. cylindraceus did not exhibit any cyclical pattern of style dissolution and regeneration. It is suggested that S. cylindraceus feeds continuously from the water column during high tide and possibly within its burrow, at or below the water table, during low tide. At a suspensoid concentration of 5Omg l⁻¹, S. cylindraceus was found to filter water almost continuously (90-95% of the time). Time spent filtering dropped to 68% at 100mg l⁻¹ and 32% at 500mg l⁻¹. Filtration rates for summer collected animals (25°C) were 22.86 ± 4.36ml min.⁻¹, some 3ml min.⁻¹ greater than that recorded for winter (16°C) collected animals. Filtration rate may be expressed as a function of shell length by the equations: y=0.247x¹̇⁰⁶⁶ (winter) and y=0.758x⁰̇⁸²⁶ (summer). Solen cylindraceus was capable of acclimating its filtration rate to both high and low temperatures under laboratory conditions. Filtration rate exhibited a thermal optimum in the range 15-35°C, declining at higher and lower temperatures. Q₁₀ values of filtration decreased rapidly from greater than 4 to less than 2, when the thermal optimum was reached. Maximum rates generally occurred at approximately 5°C above the temperature to which the animal had been acclimated. Optimal filtration rates (19-23ml min.⁻¹) were recorded in the salinity range 15-45%. When subjected to abrupt changes in salinity, filtration rates were immediately depressed. The extent and duration of these decreased filtration rates were dependent upon the magnitude and direction of salinity change, and were always less in animals exposed to hyper- than hyposaline conditions. Animals exposed to increased temperature and simultaneous elevated or unchanged salinity, showed a slight increase in filtration rate followed by rapid acclimation. A decrease in both temperature and salinity resulted in an initial decrease in filtration rate and a longer acclimation period. The ability of S. cylindraceus to acclimate fully within a wide temperature and salinity range, and to filter maximally in hypersaline conditions may, in part, explain its unusually high abundance in the Kariega estuary, despite it being close to the southernmost limit of the animal's geographical distribution. No significant difference in flItration rate was recorded at suspensoid concentrations of 5-100mg 1⁻¹. However, at 250 and 500mg l⁻¹ filtration rates decreased significantly, and coincided with increased levels of pseudofaecal production. Solen cylindraceus retained particles down to 2.5-3.0µm with great efficiency (ca. 60-90% efficiency). Below this particle size, retention efficiency decreased rapidly and a net production of particles was recorded below 1.51µm. Particle retention was independent of temperature (15 and 25°C) and salinity (15 and 35%). Use was made of stable carbon isotope analyses (¹³C/¹²C ratios) in an attempt to determine the important food sources of S. cylindraceus within the Kariega estuary. The results obtained demonstrated an enrichment in δ¹³ values for S. cylindraceus from the upper (-27.9%) to the middle (-25%c) and lower (-21.6%o ) reaches of the estuary, with no seasonal variation apparent. The bivalve was substantially more depleted in ¹³C relative to the dominant aquatic macrophytes Zostera capensis (-9.1 to -15.6%o) and Spartina maritima (-12.5%o). The use of δ¹³ alone, however, to unequivocally "pin point" specific food sources of a filter feeder in a predominantly detritus based food web, is limited. It is suggested that in the Kariega estuary, riparian litter and other terrestrially derived vegetation contribute to the carbon pool. A possible contribution of ¹³C depleted food sources via chemoautotrophic and/or anaerobic pathways, to the diet of S. cylindraceus, is suggested.
36

Studies on the biology and ecology of Amblyomma Herbraem Koch, 1844 and other tick species (Ixodidae) of the Eastern Cape

Norval, R A I January 1975 (has links)
Tick borne diseases of livestock are among the most important factors which have retarded economic development in many parts of Africa. Modification of the environment due to the expansion of agriculture into previously undeveloped areas, together with the introduction of livestock, has disturbed the natural balance which existed between ticks and indigenous hosts. Many tick species have adapted to domestic stock, and in some instances have spread over large areas which were previously uninfested. A number of tick species which are parasitic on domestic stock, eg. Amblyomma hebraeum Koch, 1844, Boophilus decoloratus (Koch, 1844), Rhipicephalus evertsi Neumann, 1897 and Rhipicephalus appendiculatus Netunann, 1901, are vectors of pathogenic micro-organisms. Unlike indigenous hosts however, domestic stock have no innate immunity to tickborne diseases. Intro., p. 1.
37

Early Cretaceous alluvial palaeosols (Kirkwood formation, Algoa Basin, South Africa) and their palaeoenvironmental and palaeoclimatological significance

Frost, Susan January 1996 (has links)
The Kirkwood Formation in the Bushman's River area of the Algoa Basin is characterised by a number of fining-upward cycles. These have been interpreted as indicating deposition in a dynamic aggrading meandering river system with the channel deposits (conglomerates grading upwards into sandstones) fining upward into the overbank deposits (mudrocks). Channel, channel-margin and overbank deposits were recognised. The three mudrock sequences logged comprise compound pedofacies sequences of multistorey, simple and cumulative palaeosols. Distinctive palaeopedological features, such as root traces and pedotubules, soil horizons and structures, mottles, and iron-rich and calcareous glaebules and calcareous hardpan lenses and layers were used to identify a number of palaeosols within the mudrock sequences. Each mudrock sequence comprises multistorey entisol, inceptisol, alfisol, ultisol, aridisol and vertisol profiles at different stags of pedogenic maturity. The entisols and inceptisols are relatively immature profiles formed close to the meandering river channel and are classified as channel-margin palaeosols. The ultisols, alfisols, aridisols and vertisols are more mature and formed at some distance from the channel. They are classified as proximal floodbasin or distal floodbasin palaeosols depending on their maturity, distance from the channel and grain-size. Slickensides, desiccation cracks, and iron-rich concretions occur, indicating multiple cycles of wetting and drying. A low water-table beneath the floodplain is indicated by both the prominent maroon-brown colouration of the mudstones, caused by oxidation during deposition, and the general lack of evaporites in the sequence. Calcretes comprising calcic and petrocalcic horizons are very common in the lower mudrock sequence, rare in the middle mudrock sequence and relatively common in the upper mudrock sequence. The calcretes generally consist a nodular zone which may, in some cases, be capped by a thin hardpan layer. The calcic palaeosols commonly show stages of carbonate accumulation which indicate at least 10 000 years of formation. The lack of calcrete formation in some of the profiles may indicate frequent flooding and high sediment accretion rates or a decrease in the influx of Ca²⁺-rich aeolian dust into the depositional basin. Clay alluviation is common in many of the profiles and soil structures are commonly well developed. The palaeosols are interpreted as having formed on an aggrading floodplain in a warm to hot (25-30°C), semi-arid climate with a low but seasonal rainfall (100-500mm per annum).
38

The habitat and feeding ecology of the klipspringer Oreotragus Oreotragus (Zimmermann, 1973) in two areas of the Cape Province

Norton, Peter Maurice 09 February 2011 (has links)
The study investigates the habitat preferences and ecological adaptations of the klipspringer in the Namaqualand and the southern Cape mountains. Klipspringer social organisation was found· to consist of a monogamously mated pair defending a territory which varies in size according to rainfall. The pair bond is very strong and role differentiation occurs, with the male spending more time than the female in anti-predator vigilance. Anatomical and physiological adaptations include a modified digit structure, kidneys with a high concentrating ability, and a unique pelage for insulation. Seasonal variations in activity patterns and feeding preferences are discussed in relation to weather conditions, metabolic requirements and possible plant defensive mechanisms. Klipspringers avoid competition with other small antelope by preferring more rocky terrain, and possible methods of food separation from dassies are suggested. The significance of all these factors in relation to the conservation and management of klipspringer populations is examined. / Dissertation (MSc)--University of Pretoria, 2011. / Zoology and Entomology / unrestricted
39

Service delivery, the state and NGO's: the case of Peddie extension, Eastern Cape

Ngcayi, Qaqambile Quintin January 2013 (has links)
This study intends to assess the roles of the State and non-governmental organisation in community development with regard to housing provision. Peddie Extension in Ngqushwa Municipality was chosen and used as an area of study. The study is based on the assumption that the State has not been performing or has performed poorly in its role as provider of houses in the rural areas of Ngqushwa Local Municipality in Peddie Extension. The study comprises of five chapters. The study was designed to assess whether the community members from the Peddie Extension are satisfied with the housing delivery process and how they have benefitted from the process. Additionally, it was designed to understand, and analyse the roles played by the State and non-governmental organisations in housing delivery for the poor people in rural Peddie Extension. The study tried to review the available literature regarding the role of State and non-governmental organisations (NGOs) in community development in an effort to have a broader understanding of their role in housing delivery in the rural area in Peddie Extension. This study adopted a qualitative approach and took the form of exploratory research. The researcher selected purposively the participants for interviews namely, residents of Peddie Extension in the Ngqushwa Municipality, a Municipality official and non-governmental organisation (NGO) official. The research methodology and the interpretation of the research findings are described. The research findings of the qualitative research were analysed and reported on. Finally, plenty of conclusions that were arrived at during the study, followed by specific recommendations were made.
40

Biological activities of medical plants traditionally used in the Eastern Cape to treat pneumonia

Kamanga, Melvin Chalochapasi January 2013 (has links)
Infectious diseases such as pneumonia still pose a major global health concern. Currently, the world is facing widespread emergence of acquired bacterial resistance to antibiotics which constitute one of the chief causes of infectious diseases. The accumulation of different antibiotic resistance mechanisms within the same strains has induced the appearance of the so called “superbugs”, or “multiple-drug resistant bacteria”. Due to antibiotic resistance, attention is currently being drawn towards biologically active components isolated from plant species commonly used as herbal medicine, as they may offer a new source of antibacterial, antifungal and antiviral activities. This is the basis of this study. In this study four medicinal plants namely, Cassia abbreviata, Geranium incanum, Pelargonium hortorum and Tecoma capensis were investigated for their antimicrobial potential. In vitro antimicrobial activity using agar disc diffusion method, agar dilution method and broth microdilution plate determination of minimum inhibitory concentration (MIC), were carried out against ATCC (American Type Culture Collection) strains and clinical isolates known to cause pneumonia. Aqueous, methanol and acetone extracts from the selected plants were thus tested against strains of Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus, Klebsiella pneumoniae, Pseudomonas aeruginosa, Acinetobacter baumannii, Escherichia coli and Candida albicans. The plants exhibited pronounced antimicrobial activity and were more active against Gram-positive bacteria than Gram-negative bacteria. During agar disc diffusion method, the highest inhibition zone was demonstrated by the acetone extract of P. hortorum (IZ=22mm and AI=0.73) against the reference strain of S. pneumoniae (ATCC 49619). The range of zones of inhibition in diameter across strains of S. pneumoniae and H. influenzae was 7mm to 22mm with activity index range of 0.23 to 0.74. The lowest MIC produced by medicinal plants in the study during agar disc diffusion method against S. pneumoniae and H. influenzae strains, was 2.5mg/ml. In broth microdilution plate assay, the lowest MIC demonstrated by C. abbreviata, T. capensis and P. hortorum extracts on tested bacteria was 0.031mg/ml and that of G. incanum was 0.063mg/ml. Candida albicans strains were only inhibited at 20mg/ml by the study plants. The highest activity among the individual extracts was shown by P. hortorum methanol extract which inhibited 71% of the studied bacteria. T. capensis methanol extract was the least and inhibited only 17% of the tested bacteria. The strains of Klebsiella pneumoniae showed the highest resistance to medicinal plants employed in this study. Traditional preparation of selected medicinal plants did not show any significant antimicrobial activity. Bioactive analysis of compounds on study plants was carried out using standard methods which revealed the presence of anthraquinones, flavonoids, phytosterol, saponins, tannins and triterpenoids. Comparison of the inhibitory effect of the plant extracts against some broad spectrum antibiotics revealed that the tested medicinal plants showed greater antimicrobial activity than standard antibiotics. However, there was no correlation between the antibiotic susceptibility patterns of the bacteria and the effects of the plants, signifying that plants probably function through different mechanisms. Bioautographic findings on thin-layer chromatography plate, exhibited clear zones of inhibition of bacterial growth with the Rf value range of 0.09 to 0.94. Anti-mutagenic activity was assayed by the Ames mutagenicity test in the plate-incorporation method using histidine mutants of S. typhimurium strains TA 100. The selected plant extracts at 2.5mg/ml and 5mg/ml did not induce mutagenesis in the absence of liver-metabolizing enzymes. The study results indicated that the selected plants are capable of inhibiting the growth of the studied pathogenic microorganisms to a varied degree. The leaves of G. incanum, P. hortorum, T. capensis as well as the stem bark of C. abbreviata could be novel sources of antimicrobial agents that might have broad spectrum activity. The anti-mutagenic properties of the studied medicinal plants may also provide additional health supplemental value to the other claimed therapeutic properties of the plants.

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