Politics in the slum: a view from South Africa
- Authors: Pithouse, Richard, 1970-
- Date: 2010
- Language: English
- Type: Article
- Identifier: vital:6209 , http://hdl.handle.net/10962/d1008579
- Description: [From introduction]The modern state, and its civil society, have always been comfortable with workers in their allotted place – be it formed around the immediate needs of industrial production, like the migrant workers hostels in apartheid South Africa or contemporary Dubai, or an attempt at creating a haven, like the suburban home which has its roots in the gendered and raced class compromise reached in North America after the Second World War. When there has been a part of the population rendered or considered superfluous to the immediate needs of production there has been a degree of comfort with the inevitably bounded spaces into which these people have been abandoned or contained – prisons, ghettos, Bantustans etc. But both the modern state and civil society have always been acutely uncomfortable with that part of the ‘dangerous class’ - vagabonds or squatters - that are, by virtue of their occupation of space outside of state regulation, by definition out of place and threatening to domination constructed, along with other lines of force, on the ordering of space.
- Full Text:
- Date Issued: 2010
- Authors: Pithouse, Richard, 1970-
- Date: 2010
- Language: English
- Type: Article
- Identifier: vital:6209 , http://hdl.handle.net/10962/d1008579
- Description: [From introduction]The modern state, and its civil society, have always been comfortable with workers in their allotted place – be it formed around the immediate needs of industrial production, like the migrant workers hostels in apartheid South Africa or contemporary Dubai, or an attempt at creating a haven, like the suburban home which has its roots in the gendered and raced class compromise reached in North America after the Second World War. When there has been a part of the population rendered or considered superfluous to the immediate needs of production there has been a degree of comfort with the inevitably bounded spaces into which these people have been abandoned or contained – prisons, ghettos, Bantustans etc. But both the modern state and civil society have always been acutely uncomfortable with that part of the ‘dangerous class’ - vagabonds or squatters - that are, by virtue of their occupation of space outside of state regulation, by definition out of place and threatening to domination constructed, along with other lines of force, on the ordering of space.
- Full Text:
- Date Issued: 2010
Semi-submersible rigs: a vector transporting entire marine communities around the world
- Wanless, Ross M, Scott, Sue, Sauer, Warwick H H, Andrew, Timothy G, Glass, James P, Godfrey, Brian, Griffiths, Charles, Yeld, Eleanor
- Authors: Wanless, Ross M , Scott, Sue , Sauer, Warwick H H , Andrew, Timothy G , Glass, James P , Godfrey, Brian , Griffiths, Charles , Yeld, Eleanor
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/126920 , vital:35935 , https://doi.10.1007/s10530-009-9666-2
- Description: A virtually intact subtropical reef community (14 phyla, 40 families and 62 non-native taxa) was associated with a rig under tow from Brazil that became stranded on the remote island of Tristan da Cunha. This exposes rigs as a significant vector spreading alien marine organisms, and includes the first records of free-swimming marine finfish populations becoming established after unintentional movement. With relatively trivial effort, a pre-tow clean would have obviated the need to salvage and dispose of the rig (undertaken largely to address concerns about invasive species), at a cost of *US$20 million. Our findings show that towing biofouled structures across biogeographic boundaries present unexcelled opportunities for invasion to a wide diversity of marine species. Better control and management of this vector is required urgently. Simultaneous, unintentional introductions of viable populations of multiple marine organisms are rare events, and we develop a basic framework for rapid assessment of invasion risks.
- Full Text:
- Date Issued: 2010
- Authors: Wanless, Ross M , Scott, Sue , Sauer, Warwick H H , Andrew, Timothy G , Glass, James P , Godfrey, Brian , Griffiths, Charles , Yeld, Eleanor
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/126920 , vital:35935 , https://doi.10.1007/s10530-009-9666-2
- Description: A virtually intact subtropical reef community (14 phyla, 40 families and 62 non-native taxa) was associated with a rig under tow from Brazil that became stranded on the remote island of Tristan da Cunha. This exposes rigs as a significant vector spreading alien marine organisms, and includes the first records of free-swimming marine finfish populations becoming established after unintentional movement. With relatively trivial effort, a pre-tow clean would have obviated the need to salvage and dispose of the rig (undertaken largely to address concerns about invasive species), at a cost of *US$20 million. Our findings show that towing biofouled structures across biogeographic boundaries present unexcelled opportunities for invasion to a wide diversity of marine species. Better control and management of this vector is required urgently. Simultaneous, unintentional introductions of viable populations of multiple marine organisms are rare events, and we develop a basic framework for rapid assessment of invasion risks.
- Full Text:
- Date Issued: 2010
The ambivalence of African elitehood:
- Authors: Matthews, Sally
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142442 , vital:38080 , DOI: 10.1177/0021909609357416
- Description: Recent discussions in South Africa about the role of the so-called patriotic bourgeoisie highlight the much debated question of what role elite Africans can and ought to play in the upliftment of the poor. Those supporting the notion of a patriotic bourgeoisie believe that national or racial solidarity is sufficient to allow privileged Africans to act in the interests of their poorer fellow citizens. However, a reconsideration of an older discussion of African elitehood, that of Amilcar Cabral, suggests that something more may be needed before elites can act in the interests of the poor. Cabral argues that elites need to renounce their privilege and to live and struggle alongside the poor if pro-poor societal transformation is to be achieved. While Cabral may be right that shared racial or national identity is insufficient for elite solidarity with the poor, he does not consider all the complexities that arise when elites actually try to work with and for the poor. A consideration of the experiences of a long-standing Senegalese NGO reveal some of these complexities and suggest that any attempt by African elites to engage meaningfully in the upliftment of the poor, will inevitably involve continuous and difficult negotiation between paternalism and naïve egalitarianism.
- Full Text:
- Date Issued: 2010
- Authors: Matthews, Sally
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142442 , vital:38080 , DOI: 10.1177/0021909609357416
- Description: Recent discussions in South Africa about the role of the so-called patriotic bourgeoisie highlight the much debated question of what role elite Africans can and ought to play in the upliftment of the poor. Those supporting the notion of a patriotic bourgeoisie believe that national or racial solidarity is sufficient to allow privileged Africans to act in the interests of their poorer fellow citizens. However, a reconsideration of an older discussion of African elitehood, that of Amilcar Cabral, suggests that something more may be needed before elites can act in the interests of the poor. Cabral argues that elites need to renounce their privilege and to live and struggle alongside the poor if pro-poor societal transformation is to be achieved. While Cabral may be right that shared racial or national identity is insufficient for elite solidarity with the poor, he does not consider all the complexities that arise when elites actually try to work with and for the poor. A consideration of the experiences of a long-standing Senegalese NGO reveal some of these complexities and suggest that any attempt by African elites to engage meaningfully in the upliftment of the poor, will inevitably involve continuous and difficult negotiation between paternalism and naïve egalitarianism.
- Full Text:
- Date Issued: 2010
The Global Auction: the broken promises of education, jobs, and incomes
- Authors: Badat, Saleem
- Date: 2010
- Language: English
- Type: Text
- Identifier: vital:7786 , http://hdl.handle.net/10962/d1015941
- Description: Discussant: Hugh Lauder, University of Bath - Keynote Paper/Address: Economic Globalisation, Skill Formation and the Consequences for Knowledge Workers
- Full Text:
- Date Issued: 2010
- Authors: Badat, Saleem
- Date: 2010
- Language: English
- Type: Text
- Identifier: vital:7786 , http://hdl.handle.net/10962/d1015941
- Description: Discussant: Hugh Lauder, University of Bath - Keynote Paper/Address: Economic Globalisation, Skill Formation and the Consequences for Knowledge Workers
- Full Text:
- Date Issued: 2010
The utility of Coleoptera in forensic investigations
- Midgley, John M, Richards, Cameron S, Villet, Martin H
- Authors: Midgley, John M , Richards, Cameron S , Villet, Martin H
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/442783 , vital:74033 , ISBN 978-1-4020-9684-6 , https://doi.org/10.1007/978-1-4020-9684-6_4
- Description: Forensic entomology is a developing field of forensic science, so there are many avenues to investigate. These avenues include novel directions that have never been addressed, as well as more critical and rigorous research into areas which have already been explored. Most research in forensic entomology has focused on flies, and beetles (Coleoptera) have been at best under-emphasized. A good example of this is the review by Smith (1986), where 70 pages are dedicated to Diptera and only 12 to Coleoptera; this situation has changed little in the subsequent 20 years. To contextualize the neglect, throughout the world there are at least as many species of Coleoptera that may visit a particular carcass as Diptera (Braack 1986; Louw and van der Linde 1993; Bourel et al. 1999; Lopes de Carvalho et al. 2000; Pérez et al. 2005; Shea 2005; Watson and Carlton 2005a; Salazar 2006; Martinez et al. 2007). A common assumption underlying the neglect of Coleoptera is that Diptera locate corpses faster, and thus give a more accurate estimate of minimum Post Mortem Interval (PMImin). Recent observations (Midgley and Villet 2009b) have shown that Thanatophilus micans (Silphidae) can locate corpses and start breeding within 24 h of death, and thus the potential utility of estimates based on this species is equal to that of those based on flies.
- Full Text:
- Date Issued: 2010
- Authors: Midgley, John M , Richards, Cameron S , Villet, Martin H
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/442783 , vital:74033 , ISBN 978-1-4020-9684-6 , https://doi.org/10.1007/978-1-4020-9684-6_4
- Description: Forensic entomology is a developing field of forensic science, so there are many avenues to investigate. These avenues include novel directions that have never been addressed, as well as more critical and rigorous research into areas which have already been explored. Most research in forensic entomology has focused on flies, and beetles (Coleoptera) have been at best under-emphasized. A good example of this is the review by Smith (1986), where 70 pages are dedicated to Diptera and only 12 to Coleoptera; this situation has changed little in the subsequent 20 years. To contextualize the neglect, throughout the world there are at least as many species of Coleoptera that may visit a particular carcass as Diptera (Braack 1986; Louw and van der Linde 1993; Bourel et al. 1999; Lopes de Carvalho et al. 2000; Pérez et al. 2005; Shea 2005; Watson and Carlton 2005a; Salazar 2006; Martinez et al. 2007). A common assumption underlying the neglect of Coleoptera is that Diptera locate corpses faster, and thus give a more accurate estimate of minimum Post Mortem Interval (PMImin). Recent observations (Midgley and Villet 2009b) have shown that Thanatophilus micans (Silphidae) can locate corpses and start breeding within 24 h of death, and thus the potential utility of estimates based on this species is equal to that of those based on flies.
- Full Text:
- Date Issued: 2010
What is biocultural diversity?: a theoretical review
- Authors: Cocks, Michelle L
- Date: 2010
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/141475 , vital:37975 , ISBN 9781441957009 , DOI: 10.1007/978-1-4419-5701-6_5
- Description: Over the past decade, scholars from various fields have increasingly emphasized the detrimental effects of global socioeconomic processes on biodiversity. The industrial revolution, the demographic explosion of Homo sapiens, and the rise of the global exchange economy are all implicated as major factors that influence the loss of species diversity. From the late 1980s onward, biosystematics and conservation biology have successfully brought this concern to the attention of the public. Biodiversity is increasingly recognized as an essential resource on which families, communities, and nations depend. Biologists, ecologists, and conservationists have further recognized that solutions to biological problems lie in the mechanisms of social, cultural, and economic systems, which has led to attempts to place a monetary value on species and ecosystems to calculate the cost of using and conserving biodiversity.
- Full Text:
- Date Issued: 2010
- Authors: Cocks, Michelle L
- Date: 2010
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/141475 , vital:37975 , ISBN 9781441957009 , DOI: 10.1007/978-1-4419-5701-6_5
- Description: Over the past decade, scholars from various fields have increasingly emphasized the detrimental effects of global socioeconomic processes on biodiversity. The industrial revolution, the demographic explosion of Homo sapiens, and the rise of the global exchange economy are all implicated as major factors that influence the loss of species diversity. From the late 1980s onward, biosystematics and conservation biology have successfully brought this concern to the attention of the public. Biodiversity is increasingly recognized as an essential resource on which families, communities, and nations depend. Biologists, ecologists, and conservationists have further recognized that solutions to biological problems lie in the mechanisms of social, cultural, and economic systems, which has led to attempts to place a monetary value on species and ecosystems to calculate the cost of using and conserving biodiversity.
- Full Text:
- Date Issued: 2010
Commercial Law: ACL 121
- Bidie, S S, Lubisi-Nkoane, N
- Authors: Bidie, S S , Lubisi-Nkoane, N
- Date: 2010-01
- Subjects: Commercial law
- Language: English
- Type: Examination paper
- Identifier: vital:17361 , http://hdl.handle.net/10353/d1009813
- Description: Commercial Law: ACL 121,January Supplementary Paper 2010
- Full Text: false
- Date Issued: 2010-01
- Authors: Bidie, S S , Lubisi-Nkoane, N
- Date: 2010-01
- Subjects: Commercial law
- Language: English
- Type: Examination paper
- Identifier: vital:17361 , http://hdl.handle.net/10353/d1009813
- Description: Commercial Law: ACL 121,January Supplementary Paper 2010
- Full Text: false
- Date Issued: 2010-01
Developmental Psychology, Psychological Testing & Assessment, Research Methods: PSY 222
- Authors: Van Heerden, R , Nel, A
- Date: 2010-01
- Subjects: Developmental psychology
- Language: English
- Type: Examination paper
- Identifier: vital:17982 , http://hdl.handle.net/10353/d1010554
- Description: Developmental Psychology, Psychological Testing & Assessment, Research Methods: PSY 222, supplementary examination January 2010.
- Full Text: false
- Date Issued: 2010-01
- Authors: Van Heerden, R , Nel, A
- Date: 2010-01
- Subjects: Developmental psychology
- Language: English
- Type: Examination paper
- Identifier: vital:17982 , http://hdl.handle.net/10353/d1010554
- Description: Developmental Psychology, Psychological Testing & Assessment, Research Methods: PSY 222, supplementary examination January 2010.
- Full Text: false
- Date Issued: 2010-01
English: ECL 320
- Nyika, N, Morkel, N, Blatchford, M, Wood, F, Mndebele, T, Mkhize, Jabulani, Kirton, Tenielle, Smith, N J, Mpepo, V M
- Authors: Nyika, N , Morkel, N , Blatchford, M , Wood, F , Mndebele, T , Mkhize, Jabulani , Kirton, Tenielle , Smith, N J , Mpepo, V M
- Date: 2010-01
- Subjects: English
- Language: English
- Type: Examination paper
- Identifier: vital:18286 , http://hdl.handle.net/10353/d1011292
- Description: English: ECL 320, supplementary examination January 2010.
- Full Text: false
- Date Issued: 2010-01
- Authors: Nyika, N , Morkel, N , Blatchford, M , Wood, F , Mndebele, T , Mkhize, Jabulani , Kirton, Tenielle , Smith, N J , Mpepo, V M
- Date: 2010-01
- Subjects: English
- Language: English
- Type: Examination paper
- Identifier: vital:18286 , http://hdl.handle.net/10353/d1011292
- Description: English: ECL 320, supplementary examination January 2010.
- Full Text: false
- Date Issued: 2010-01
Developmental Psychology, Psychological Testing and Assessment, Research Methods: PSY 222
- Authors: Van Heerden, R , Nel, A
- Date: 2009-11
- Language: English
- Type: Examination paper
- Identifier: vital:18053 , http://hdl.handle.net/10353/d1010643
- Description: Developmental Psychology, Psychological Testing and Assessment, Research Methods: PSY 222, examination November 2009.
- Full Text: false
- Date Issued: 2009-11
- Authors: Van Heerden, R , Nel, A
- Date: 2009-11
- Language: English
- Type: Examination paper
- Identifier: vital:18053 , http://hdl.handle.net/10353/d1010643
- Description: Developmental Psychology, Psychological Testing and Assessment, Research Methods: PSY 222, examination November 2009.
- Full Text: false
- Date Issued: 2009-11
A case of effective single-session treatment for attention deficit and learning problems in a routine clinical practice : the value of a transdiagnostic approach to case formulation
- Whitefield-Alexander, V, Edwards, David J A
- Authors: Whitefield-Alexander, V , Edwards, David J A
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6274 , http://hdl.handle.net/10962/d1008274
- Description: This article reports a systematic clinical case study of the psychological assessment and treatment of Daniel (9), a coloured South African boy with a diagnosis of attention deficit hyperactivity disorder (ADHD) (inattentive type). The case is of scientific interest because: (1) there was only a single treatment session, in which contingency management training was delivered to Daniel’s parents and teacher; (2) there was evidence for the effectiveness of the intervention immediately and at two-year follow-up; (3) it documents the transportability to a South African context of an intervention developed by overseas research; (4) it documents the central role of case formulation in the delivery of effective psychological interventions; and (5) although Daniel met the criteria for ADHD, he also displayed symptoms of depression and social anxiety and the case supports the use of a transdiagnostic approach to case formulation. The conscientiousness with which his parents and teachers applied the programme was a major factor in the effectiveness of the intervention, and such rapid impact would not be possible where parents and teachers are unavailable or not co-operative. The publication of systematic case studies such as this one is important for the development of a local evidence-based practice in South Africa.
- Full Text:
- Date Issued: 2009
- Authors: Whitefield-Alexander, V , Edwards, David J A
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6274 , http://hdl.handle.net/10962/d1008274
- Description: This article reports a systematic clinical case study of the psychological assessment and treatment of Daniel (9), a coloured South African boy with a diagnosis of attention deficit hyperactivity disorder (ADHD) (inattentive type). The case is of scientific interest because: (1) there was only a single treatment session, in which contingency management training was delivered to Daniel’s parents and teacher; (2) there was evidence for the effectiveness of the intervention immediately and at two-year follow-up; (3) it documents the transportability to a South African context of an intervention developed by overseas research; (4) it documents the central role of case formulation in the delivery of effective psychological interventions; and (5) although Daniel met the criteria for ADHD, he also displayed symptoms of depression and social anxiety and the case supports the use of a transdiagnostic approach to case formulation. The conscientiousness with which his parents and teachers applied the programme was a major factor in the effectiveness of the intervention, and such rapid impact would not be possible where parents and teachers are unavailable or not co-operative. The publication of systematic case studies such as this one is important for the development of a local evidence-based practice in South Africa.
- Full Text:
- Date Issued: 2009
A new species of Diplacanthus from the Late Devonian (Famennian) of South Africa
- Authors: Gess, Robert W
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/73873 , vital:30237 , https://doi.org/10.1016/S0753-3969(01)88002-2
- Description: An advanced diplacanthid (Climatiiformes) is described from a Famennian estuarine environment of South Africa. It is characterized by having exceptionally long thin fin spines and a deep body form. Unusual details of the fins and fin spine insertions are preserved. This is the first record of a diplacanthid from the Southern Hemisphere.
- Full Text: false
- Date Issued: 2009
- Authors: Gess, Robert W
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/73873 , vital:30237 , https://doi.org/10.1016/S0753-3969(01)88002-2
- Description: An advanced diplacanthid (Climatiiformes) is described from a Famennian estuarine environment of South Africa. It is characterized by having exceptionally long thin fin spines and a deep body form. Unusual details of the fins and fin spine insertions are preserved. This is the first record of a diplacanthid from the Southern Hemisphere.
- Full Text: false
- Date Issued: 2009
A tropical/subtropical biogeographic disjunction in southeastern Africa separates two evolutionarily significant units of an estuarine prawn
- Teske, Peter R, Winker, A Henning, McQuaid, Christopher D, Barker, Nigel P
- Authors: Teske, Peter R , Winker, A Henning , McQuaid, Christopher D , Barker, Nigel P
- Date: 2009
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/445407 , vital:74383 , https://doi.org/10.1007/s00227-009-1168-3
- Description: Recent phylogeographic research has indicated that biodiversity in the sea may be considerably greater than previously thought. However, the majority of phylogeographic studies on marine invertebrates have exclusively used a single locus (mitochondrial DNA), and it is questionable whether the phylogroups identified can be considered distinct species. We tested whether the mtDNA phylogroups of the southern African sandprawn Callianassa kraussi Stebbing (Decapoda: Thalassinidea) are also recovered using nuclear sequence data. Four mtDNA phylogroups were recovered that were each associated with one of South Africa’s four major biogeographic provinces. Three of these were poorly differentiated, but the fourth (tropical) group was highly distinct. The nuclear phylogeny recovered two major clades, one present in the tropical region and the other in the remainder of South Africa. Congruence between mitochondrial and nuclear DNA indicates that the species comprises two Evolutionarily Significant Units sensu Moritz (1994). In conjunction with physiological data from C. kraussi and morphological, ecological and physiological data from other species, this result supports the notion that at least some of the mtDNA phylogroups of coastal invertebrates whose distributions are limited.
- Full Text:
- Date Issued: 2009
- Authors: Teske, Peter R , Winker, A Henning , McQuaid, Christopher D , Barker, Nigel P
- Date: 2009
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/445407 , vital:74383 , https://doi.org/10.1007/s00227-009-1168-3
- Description: Recent phylogeographic research has indicated that biodiversity in the sea may be considerably greater than previously thought. However, the majority of phylogeographic studies on marine invertebrates have exclusively used a single locus (mitochondrial DNA), and it is questionable whether the phylogroups identified can be considered distinct species. We tested whether the mtDNA phylogroups of the southern African sandprawn Callianassa kraussi Stebbing (Decapoda: Thalassinidea) are also recovered using nuclear sequence data. Four mtDNA phylogroups were recovered that were each associated with one of South Africa’s four major biogeographic provinces. Three of these were poorly differentiated, but the fourth (tropical) group was highly distinct. The nuclear phylogeny recovered two major clades, one present in the tropical region and the other in the remainder of South Africa. Congruence between mitochondrial and nuclear DNA indicates that the species comprises two Evolutionarily Significant Units sensu Moritz (1994). In conjunction with physiological data from C. kraussi and morphological, ecological and physiological data from other species, this result supports the notion that at least some of the mtDNA phylogroups of coastal invertebrates whose distributions are limited.
- Full Text:
- Date Issued: 2009
Rapid biological assessment of the fishery potential of Xonxa Dam, near Queenstown, South Africa
- Richardson, T J, Booth, Anthony J, Weyl, Olaf L F
- Authors: Richardson, T J , Booth, Anthony J , Weyl, Olaf L F
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125798 , vital:35818 , https://doi.10.2989/AJAS.2009.34.1.9.734
- Description: In Africa, the harvesting of fish from small reservoirs has been identified as an important food resource for small rural communities, particularly those living close to waterbodies (Kapetsky and Petr 1984, Marshall and Maes 1994, van der Knaap 1994). Development of fisheries to utilize these resources has recently been identified by the African Union as a priority investment area for poverty alleviation and regional economic development (NEPAD 2005). Within a South African context, it is suspected that there will be increased interest in developing these fisheries to address major national policy objectives, which include food security, economic empowerment, optimal economic benefit from water, and poverty eradication (RSA 1998a, 1998b). South Africa, however, presents a somewhat anomalous situation. The lack of a fishing history in communities, the lack of species with a high fisheries potential, inadequate inland fisheries policy and a lack of directed fisheries development have resulted in low utilisation levels of fish resources in South African reservoirs (Weyl et al. 2007).
- Full Text:
- Date Issued: 2009
- Authors: Richardson, T J , Booth, Anthony J , Weyl, Olaf L F
- Date: 2009
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125798 , vital:35818 , https://doi.10.2989/AJAS.2009.34.1.9.734
- Description: In Africa, the harvesting of fish from small reservoirs has been identified as an important food resource for small rural communities, particularly those living close to waterbodies (Kapetsky and Petr 1984, Marshall and Maes 1994, van der Knaap 1994). Development of fisheries to utilize these resources has recently been identified by the African Union as a priority investment area for poverty alleviation and regional economic development (NEPAD 2005). Within a South African context, it is suspected that there will be increased interest in developing these fisheries to address major national policy objectives, which include food security, economic empowerment, optimal economic benefit from water, and poverty eradication (RSA 1998a, 1998b). South Africa, however, presents a somewhat anomalous situation. The lack of a fishing history in communities, the lack of species with a high fisheries potential, inadequate inland fisheries policy and a lack of directed fisheries development have resulted in low utilisation levels of fish resources in South African reservoirs (Weyl et al. 2007).
- Full Text:
- Date Issued: 2009
A preliminary investigation of spinal kinematics during sugar cane harvesting
- Authors: Todd, Andrew I
- Date: 2008
- Language: English
- Type: Article
- Identifier: vital:6759 , http://hdl.handle.net/10962/d1009462
- Description: The sugar cane industry forms a significant portion of the South African economy, and unlike many other countries the harvesting of sugar cane in South Africa remains manual in nature. The focus of the present study was therefore on the assessment of spinal kinematics (range of motion, velocities and accelerations in all three cardinal planes) during the harvesting process. Eight workers were recruited from the Illovo Esperanza farm in Kwa-zulu Natal as subjects for the study. The experimental protocol was conducted in situ and required subjects to cut the sugar cane using specially modified knives as they would under normal harvesting conditions. The motion performance was quantified using the lumbar motion monitor (LMM), a triaxial electrogoniometer. Results indicate that the harvesting of sugar cane places excessive demands on the spine. During cutting, subjects were required to maintain the spine in a high degree of flexion throughout the task which also demonstrated significant twisting and lateral bending. Of particular concern were the high lateral velocities (ranging between 50 and 90 m.s-1), as this is a key risk factor in the development of lower back pain. It is evident from these results that new techniques of harvesting sugar cane are essential to reduce the rate of injury within this industry.
- Full Text:
- Date Issued: 2008
- Authors: Todd, Andrew I
- Date: 2008
- Language: English
- Type: Article
- Identifier: vital:6759 , http://hdl.handle.net/10962/d1009462
- Description: The sugar cane industry forms a significant portion of the South African economy, and unlike many other countries the harvesting of sugar cane in South Africa remains manual in nature. The focus of the present study was therefore on the assessment of spinal kinematics (range of motion, velocities and accelerations in all three cardinal planes) during the harvesting process. Eight workers were recruited from the Illovo Esperanza farm in Kwa-zulu Natal as subjects for the study. The experimental protocol was conducted in situ and required subjects to cut the sugar cane using specially modified knives as they would under normal harvesting conditions. The motion performance was quantified using the lumbar motion monitor (LMM), a triaxial electrogoniometer. Results indicate that the harvesting of sugar cane places excessive demands on the spine. During cutting, subjects were required to maintain the spine in a high degree of flexion throughout the task which also demonstrated significant twisting and lateral bending. Of particular concern were the high lateral velocities (ranging between 50 and 90 m.s-1), as this is a key risk factor in the development of lower back pain. It is evident from these results that new techniques of harvesting sugar cane are essential to reduce the rate of injury within this industry.
- Full Text:
- Date Issued: 2008
High level internet scale traffic visualization using hilbert curve mapping
- Irwin, Barry V W, Pilkington, Nick
- Authors: Irwin, Barry V W , Pilkington, Nick
- Date: 2008
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429911 , vital:72650 , https://doi.org/10.1007/978-3-540-78243-8_10
- Description: A high level analysis tool was developed for aiding in the analysis of large volumes of network telescope traffic, and in particular the comparisons of data col-lected from multiple telescope sources. Providing a visual means for the evaluation of worm propagation algorithms has also been achieved. By using a Hilbert curve as a means of ordering points within the visual-ization space, the concept of nearness between nu-merically sequential network blocks was preserved. The design premise and initial results obtained using the tool developed are discussed, and a number of fu-ture extensions proposed.
- Full Text:
- Date Issued: 2008
- Authors: Irwin, Barry V W , Pilkington, Nick
- Date: 2008
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429911 , vital:72650 , https://doi.org/10.1007/978-3-540-78243-8_10
- Description: A high level analysis tool was developed for aiding in the analysis of large volumes of network telescope traffic, and in particular the comparisons of data col-lected from multiple telescope sources. Providing a visual means for the evaluation of worm propagation algorithms has also been achieved. By using a Hilbert curve as a means of ordering points within the visual-ization space, the concept of nearness between nu-merically sequential network blocks was preserved. The design premise and initial results obtained using the tool developed are discussed, and a number of fu-ture extensions proposed.
- Full Text:
- Date Issued: 2008
A Digital Forensic investigative model for business organisations
- Forrester, Jock, Irwin, Barry V W
- Authors: Forrester, Jock , Irwin, Barry V W
- Date: 2007
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430078 , vital:72664 , https://www.researchgate.net/profile/Barry-Ir-win/publication/228783555_A_Digital_Forensic_investigative_model_for_business_organisations/links/53e9c5e80cf28f342f414987/A-Digital-Forensic-investigative-model-for-business-organisations.pdf
- Description: When a digital incident occurs there are generally three courses of ac-tions that are taken, generally dependant on the type of organisation within which the incident occurs, or which is responding the event. In the case of law enforcement the priority is to secure the crime scene, followed by the identification of evidentiary sources which should be dispatched to a specialist laboratory for analysis. In the case of an inci-dent military (or similar critical infrastructures) infrastructure the primary goal becomes one of risk identification and elimination, followed by re-covery and possible offensive measures. Where financial impact is caused by an incident, and revenue earning potential is adversely af-fected, as in the case of most commercial organisations), root cause analysis, and system remediation is of primary concern, with in-depth analysis of the how and why left until systems have been restored.
- Full Text:
- Date Issued: 2007
- Authors: Forrester, Jock , Irwin, Barry V W
- Date: 2007
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/430078 , vital:72664 , https://www.researchgate.net/profile/Barry-Ir-win/publication/228783555_A_Digital_Forensic_investigative_model_for_business_organisations/links/53e9c5e80cf28f342f414987/A-Digital-Forensic-investigative-model-for-business-organisations.pdf
- Description: When a digital incident occurs there are generally three courses of ac-tions that are taken, generally dependant on the type of organisation within which the incident occurs, or which is responding the event. In the case of law enforcement the priority is to secure the crime scene, followed by the identification of evidentiary sources which should be dispatched to a specialist laboratory for analysis. In the case of an inci-dent military (or similar critical infrastructures) infrastructure the primary goal becomes one of risk identification and elimination, followed by re-covery and possible offensive measures. Where financial impact is caused by an incident, and revenue earning potential is adversely af-fected, as in the case of most commercial organisations), root cause analysis, and system remediation is of primary concern, with in-depth analysis of the how and why left until systems have been restored.
- Full Text:
- Date Issued: 2007
Address at the opening of the OutRhodes Pride Week, 21 August 2007
- Authors: Badat, Saleem
- Date: 2007
- Subjects: Rhodes University
- Language: English
- Type: text
- Identifier: vital:7652 , http://hdl.handle.net/10962/d1015780
- Full Text:
- Date Issued: 2007
- Authors: Badat, Saleem
- Date: 2007
- Subjects: Rhodes University
- Language: English
- Type: text
- Identifier: vital:7652 , http://hdl.handle.net/10962/d1015780
- Full Text:
- Date Issued: 2007
Determining the daily spawning cycle of the chokka squid, Loligo reynaudii off the South African Coast
- Authors: Melo, Y , Sauer, Warwick H H
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124275 , vital:35588 , https://doi.10.1007/s11160-006-9034-6
- Description: The study investigated the duration and peak of the daily spawning cycle of the chokka squid Loligo reynaudii, and the possibility of estimating the spawning frequency by means of classification and grouping (by age) of postovulatory follicles. Post-ovulatory follicles were classified into three types: new, intermediate or old, based in part on the degree of resorption of the follicles determined from histological sections. Ovulation in this species appears to be a rapid process, seen by the occurrence of both mature oocytes and post-ovulatory follicles in partially spent ovaries. Results suggest that chokka squid present a diel timing of spawning, with successive periods of egg accumulation at night, interrupted by periods of active spawning during the day. The ovarian cycle for this species appears typical of serial spawners. During the spawning phase ovaries go through ripe, partially spent and recovering stages by undergoing a process of maturation, ovulation and redeveloping, where a new batch of advanced oocytes is recruited. The cycle typically appears to last between 24 and 36 h, and may depend on a number of factors such as environmental conditions and the presence of predators. The short-lived (about 14 h) nature of the post-ovulatory follicles precludes the calculation of the exact spawning interval and does not allow us to accurately predict the spawning frequency. Together with the degree of oviduct fullness they do however give a good indication of imminent or recent spawning.
- Full Text:
- Date Issued: 2007
- Authors: Melo, Y , Sauer, Warwick H H
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124275 , vital:35588 , https://doi.10.1007/s11160-006-9034-6
- Description: The study investigated the duration and peak of the daily spawning cycle of the chokka squid Loligo reynaudii, and the possibility of estimating the spawning frequency by means of classification and grouping (by age) of postovulatory follicles. Post-ovulatory follicles were classified into three types: new, intermediate or old, based in part on the degree of resorption of the follicles determined from histological sections. Ovulation in this species appears to be a rapid process, seen by the occurrence of both mature oocytes and post-ovulatory follicles in partially spent ovaries. Results suggest that chokka squid present a diel timing of spawning, with successive periods of egg accumulation at night, interrupted by periods of active spawning during the day. The ovarian cycle for this species appears typical of serial spawners. During the spawning phase ovaries go through ripe, partially spent and recovering stages by undergoing a process of maturation, ovulation and redeveloping, where a new batch of advanced oocytes is recruited. The cycle typically appears to last between 24 and 36 h, and may depend on a number of factors such as environmental conditions and the presence of predators. The short-lived (about 14 h) nature of the post-ovulatory follicles precludes the calculation of the exact spawning interval and does not allow us to accurately predict the spawning frequency. Together with the degree of oviduct fullness they do however give a good indication of imminent or recent spawning.
- Full Text:
- Date Issued: 2007
Lazarus in the Constitutional Court: an exhumation of the exceptio doli generalis
- Authors: Glover, Graham B
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70678 , vital:29688 , https://hdl.handle.net/10520/EJC53775
- Description: A landmark moment in the history of South African contract law was the emphatic interment of the exceptio doli generalis by Joubert JA in Bank of Lisbon and South Africa v De Ornelas 1988 (3) SA580 (A). Throughout most of the twentieth century, the exceptio doli generalis had been viewed as an equitable defence that allowed a defendant to resist a claim for performance under a contract when there was something unconscionable about the plaintiff's seeking to enforce the contract (or a clause thereof) in the specific circumstances of that case (see A J Kerr Principles of the Law of Contract 6 ed (2002) 637ff; P J Aronstam 'Unconscionable contracts: The South African solution?' (1979) 42 THRHR 21; P van Warmelo 'Exceptio doli' 1981 De Jure 202).
- Full Text: false
- Date Issued: 2007
- Authors: Glover, Graham B
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70678 , vital:29688 , https://hdl.handle.net/10520/EJC53775
- Description: A landmark moment in the history of South African contract law was the emphatic interment of the exceptio doli generalis by Joubert JA in Bank of Lisbon and South Africa v De Ornelas 1988 (3) SA580 (A). Throughout most of the twentieth century, the exceptio doli generalis had been viewed as an equitable defence that allowed a defendant to resist a claim for performance under a contract when there was something unconscionable about the plaintiff's seeking to enforce the contract (or a clause thereof) in the specific circumstances of that case (see A J Kerr Principles of the Law of Contract 6 ed (2002) 637ff; P J Aronstam 'Unconscionable contracts: The South African solution?' (1979) 42 THRHR 21; P van Warmelo 'Exceptio doli' 1981 De Jure 202).
- Full Text: false
- Date Issued: 2007