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The memoirs of C.S. Douglas

- Douglas, Cuthbert Sholto

Authors: Douglas, Cuthbert Sholto
Date: 2015-06-05
Subjects: Surveying -- South Africa -- History , Surveyors -- South Africa -- Biography
Language: English
Type: Text
Identifier: vital:547 , http://hdl.handle.net/10962/d1018500
Description: In this transcription of original memoirs, Cuthbert Sholto Douglas, 21.1.1887 - 6.8.1973, the son of a Methodist minister, describes his youth in Sea Point, and his studies in Land Surveying in Cape Town in the early years of the 20th century. His early career as a surveyor took place in Piet Retief, before he joined the Department of Irrigation. His responsiblities included work on the Hartebeespoort Dam, and the reconnaissance into the feasibilty of the Kalahari water scheme proposed by Prof. Schwartz. He worked on the Sundays River Valley irrigation canals, before proceeding to work in Bloemfontein, Pietermaritzburg and finally Pretoria as Surveyor General. His memoir contains numerous interesting details of life in the field in the early days of land surveying in South Africa, as well as the social history of the time. He was married to Honor Broadhead, daughter of a Methodist minister, and father of Sholto, Kenneth, Hugh and Malcolm Douglas. , Donated by Geoff Douglas, 2015
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A survey of the classification of fuzzy subgroups of some finite groups

- Makamba, Babington

Authors: Makamba, Babington
Date: 2015-03-18
Language: English
Type: Inaugural lecture
Identifier: vital:11981 , http://hdl.handle.net/10353/d1016591
Description: In this lecture we survey the classification of fuzzy subgroups of finite groups as studied byProf. B.B Makamba and V. Murali. We present the impact of the research on our postgraduate students. The classification is focusing on finite abelian p-groups and dihedral groups, giving a mixture of abelian and non-abelian groups. We show some highlights and what still needs to be done in the classification of fuzzy subgroups. We also touch on what other researchers have achieved in the classification of fuzzy subgroups and how our work is related to theirs. We begin with a historical background of fuzzy logic. , Inaugural Lecture Address by Prof. Babington Makamba- A survey of the classification of fuzzy subgroups of some finite groups.
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Date Issued: 2015-03-18

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A quantitative analysis of microplastic pollution along the south-eastern coastline of South Africa

- Nel, Holly A, Froneman, P William

Authors: Nel, Holly A , Froneman, P William
Date: 2015
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/68032 , vital:29187 , https://doi.org/10.1016/j.marpolbul.2015.09.043
Description: Publisher version , The extent of microplastic pollution (< 5 mm) in the southern hemisphere, particularly southern Africa, is largely unknown. This study aimed to evaluate microplastic pollution along the south-eastern coastline of South Africa, looking at whether bays are characterised by higher microplastic densities than open stretches of coastline in both beach sediment and surf-zone water. Microplastic (mean ± standard error) densities in the beach sediment ranged between 688.9 ± 348.2 and 3308 ± 1449 particles·m− 2, while those in the water column varied between 257.9 ± 53.36 and 1215 ± 276.7 particles·m− 3. With few exceptions there were no significant spatial patterns in either the sediment or water column microplastic densities; with little differences in density between bays and the open coast (P > 0.05). These data indicate that the presence of microplastics were not associated with proximity to land-based sources or population density, but rather is governed by water circulation.
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Date Issued: 2015

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An assessment of chlorophyll-a concentration spatio-temporal variation using Landsat satellite data, in a small tropical reservoir

- Dalu, Tatenda, Dube, Timothy, Froneman, P William, Sachikonye, Mwazvita T B, Clegg, Bruce W, Nhiwatiwa, Tamuka

Authors: Dalu, Tatenda , Dube, Timothy , Froneman, P William , Sachikonye, Mwazvita T B , Clegg, Bruce W , Nhiwatiwa, Tamuka
Date: 2015
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/68042 , vital:29189 , https://doi.org/10.1080/10106049.2015.1027292
Description: Publisher version , Traditional approaches to monitoring aquatic systems are often limited by the need for data collection which often is time-consuming, expensive and non-continuous. The aim of the study was to map the spatio-temporal chlorophyll-a concentration changes in Malilangwe Reservoir, Zimbabwe as an indicator of phytoplankton biomass and trophic state when the reservoir was full (year 2000) and at its lowest capacity (year 2011), using readily available Landsat multispectral images. Medium-spatial resolution (30 m) Landsat multispectral Thematic Mapper TM 5 and ETM+ images for May to December 1999–2000 and 2010–2011 were used to derive chlorophyll-a concentrations. In situ measured chlorophyll-a and total suspended solids (TSS) concentrations for 2011 were employed to validate the Landsat chlorophyll-a and TSS estimates. The study results indicate that Landsat-derived chlorophyll-a and TSS estimates were comparable with field measurements. There was a considerable wet vs. dry season differences in total chlorophyll-a concentration, Secchi disc depth, TSS and turbidity within the reservoir. Using Permutational multivariate analyses of variance (PERMANOVA) analysis, there were significant differences (p < 0.0001) for chlorophyll-a concentration among sites, months and years whereas TSS was significant during the study months (p < 0.05). A strong positive significant correlation among both predicted TSS vs. chlorophyll-a and measured vs. predicted chlorophyll-a and TSS concentrations as well as an inverse relationship between reservoir chlorophyll-a concentrations and water level were found (p < 0.001 in all cases). In conclusion, total chlorophyll-a concentration in Malilangwe Reservoir was successfully derived from Landsat remote sensing data suggesting that the Landsat sensor is suitable for real-time monitoring over relatively short timescales and for small reservoirs. Satellite data can allow for surveying of chlorophyll-a concentration in aquatic ecosystems, thus, providing invaluable data in data scarce (limited on site ground measurements) environments.
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Date Issued: 2015

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Cultural values of natural resources among the San people neighbouring Kgalagadi Transfrontier Park, South Africa

- Thondhlana, Gladman, Shackleton, Sheona E

Authors: Thondhlana, Gladman , Shackleton, Sheona E
Date: 2015
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/67699 , vital:29131 , https://doi.org/10.1080/13549839.2013.818950
Description: Publisher version , Globally, cultural values of natural resources are increasingly recognised as important for local natural resource management and conservation in and beyond parks. The tendency has been to focus on the direct-use rather than the cultural values and importance of natural resources. The cultural values underlying natural resources (directly or indirectly used) and various natural resource-based activities, and the implications for conservation, remain little explored. Drawing from household surveys, in-depth qualitative interviews, observations and secondary data, we explore the cultural significance of natural resources and different land-use practices among the San people bordering Kgalagadi Transfrontier Park in South Africa. Our findings illustrate that though cultural values are inextricably linked to resource use, they are not recognised by all community members. Further, cultural values arise from a diverse and sometimes conflicting array of values that punctuate individuals' lifestyles. A better understanding of context-specific cultural settings and the linkages between the cultural and material dimensions of resource use can lead to the development of interventions that can ensure effective conservation of both natural resources and culture.
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Date Issued: 2015

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Determinants of student satisfaction with campus residence life at a South African university

- Botha, Ferdi, Snowball, Jeanette D, De Klerk, Vivian A, Radloff, Sarah E

Authors: Botha, Ferdi , Snowball, Jeanette D , De Klerk, Vivian A , Radloff, Sarah E
Date: 2015
Language: English
Type: text , book
Identifier: http://hdl.handle.net/10962/69277 , vital:29475 , https://doi.org/10.1007/978-3-319-15904-1_2
Description: Factors outside the classroom can contribute to academic success as well as the achievement of important outcomes such as the appreciation of human diversity. Striving towards equality of residence life satisfaction is thus important for academic outcomes and for the development of well-functioning citizens. This study is based on the 2011 Quality of Residence Life (QoRL) Survey, conducted at a South African university, comprising roughly 2,000 respondents. The study investigates the association between satisfaction with QoRL and (i) residence milieu and characteristics, (ii) direct and indirect discrimination, (iii) perceptions of drug and alcohol issues in residence, (iv) safety, and (v) individual student characteristics. One main finding is that there are no significant differences in satisfaction with QoRL across racial and gender groups; suggesting significant progress in university transformation and equity goals. The general atmosphere and characteristics of residences are also important predictors of QoRL satisfaction.
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Date Issued: 2015

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