Re-estimation of erosion levels in Group I and II kimberlites between Lesotho, Kimberley and Victoria West, South Africa
- Hanson, E Kelsey, Moore, John M, Robey, J, Bordy, Emese M, Marsh, Julian S
- Authors: Hanson, E Kelsey , Moore, John M , Robey, J , Bordy, Emese M , Marsh, Julian S
- Date: 2006
- Language: English
- Type: text , long abstracts
- Identifier: http://hdl.handle.net/10962/132144 , vital:36804
- Description: The estimation of post-emplacement kimberlite erosion in South Africa through the study of upper-crustal xenoliths is relatively unexplored; however the presence of these xenoliths has been recognized for well over a 100 years. Previously postemplacement erosion levels of a small number of kimberlite pipes have been inferred through the study of the degree of country-rock diagenesis, the depth of sill formation and the depth of the initiation of diatreme facies kimberlite.
- Full Text:
- Date Issued: 2006
- Authors: Hanson, E Kelsey , Moore, John M , Robey, J , Bordy, Emese M , Marsh, Julian S
- Date: 2006
- Language: English
- Type: text , long abstracts
- Identifier: http://hdl.handle.net/10962/132144 , vital:36804
- Description: The estimation of post-emplacement kimberlite erosion in South Africa through the study of upper-crustal xenoliths is relatively unexplored; however the presence of these xenoliths has been recognized for well over a 100 years. Previously postemplacement erosion levels of a small number of kimberlite pipes have been inferred through the study of the degree of country-rock diagenesis, the depth of sill formation and the depth of the initiation of diatreme facies kimberlite.
- Full Text:
- Date Issued: 2006
Reactions in the solid state
- Authors: Brown, Michael Ewart
- Date: 2006
- Subjects: Solid state chemistry , Thermal analysis , Chemistry, Analytic
- Language: English
- Type: Thesis , Doctoral , DSc
- Identifier: vital:4529 , http://hdl.handle.net/10962/d1015762
- Description: I have chosen the title for this thesis, "Reactions in the Solid State", for two reasons: Firstly, it is broad enough to cover all of my areas of research, which have been: • Effects of irradiation on solids (PhD topic) • Silver refining (while at the Chamber of Mines) • Kinetics of decomposition of solids (with Dr A.K. Galwey and various others) • Techniques of thermal analysis • Pyrotechnic delay systems (with support from AECI Explosives) • Thermal and photostability of drugs (with Prof B.D. Glass) and, secondly, it was the title of the very successful book co-authored by Drs Andrew Galwey, David Dollimore and me. A large part of my research has been involved in the writing and editing of books, so these are covered in a separate commentary, while commentary on the more than 100 papers to which I have contributed forms the main part of this compilation. It is hoped that the electronic format will enable ready access of to all aspects of my research, including electronic versions of the original papers. The reader will need a copy of Adobe Acrobat Reader to access these.
- Full Text:
- Date Issued: 2006
- Authors: Brown, Michael Ewart
- Date: 2006
- Subjects: Solid state chemistry , Thermal analysis , Chemistry, Analytic
- Language: English
- Type: Thesis , Doctoral , DSc
- Identifier: vital:4529 , http://hdl.handle.net/10962/d1015762
- Description: I have chosen the title for this thesis, "Reactions in the Solid State", for two reasons: Firstly, it is broad enough to cover all of my areas of research, which have been: • Effects of irradiation on solids (PhD topic) • Silver refining (while at the Chamber of Mines) • Kinetics of decomposition of solids (with Dr A.K. Galwey and various others) • Techniques of thermal analysis • Pyrotechnic delay systems (with support from AECI Explosives) • Thermal and photostability of drugs (with Prof B.D. Glass) and, secondly, it was the title of the very successful book co-authored by Drs Andrew Galwey, David Dollimore and me. A large part of my research has been involved in the writing and editing of books, so these are covered in a separate commentary, while commentary on the more than 100 papers to which I have contributed forms the main part of this compilation. It is hoped that the electronic format will enable ready access of to all aspects of my research, including electronic versions of the original papers. The reader will need a copy of Adobe Acrobat Reader to access these.
- Full Text:
- Date Issued: 2006
Recruitment behaviour in the ponerine ant, Plectroctena mandibularis F. Smith (Hymenoptera: Formicidae)
- Wilkins, K J, Harman, K, Villet, Martin H
- Authors: Wilkins, K J , Harman, K , Villet, Martin H
- Date: 2006
- Language: English
- Type: text , Article
- Identifier: vital:6887 , http://hdl.handle.net/10962/d1011647
- Description: Although workers of Plectroctena mandibularis laid trails with their stings while foraging, the trails appeared to be for individual orientation, because they never recruited nestmates to prey. However, both workers and queens laid trails when recruiting nestmates of either caste to new nest sites. During trail-laying, fluted hairs on the posterior edge of tergite VI were dragged along the ground, presumably applying a pheromone to the substrate. Anatomical and behavioural evidence suggests that pygidial gland secretions moved from the intersegmental pygidial gland between tergites VI and VII into a fingerprint-like, lamellar cuticular reservoir on the pygidium, and from there via the hairs to the substrate. These results suggest that recruitment may be crucial to moving nests but of value only to certain types of foraging, and that recruitment might even have originated in the Formicidae in the context of colony relocation, and then secondarily evolved to assist foraging.
- Full Text:
- Date Issued: 2006
- Authors: Wilkins, K J , Harman, K , Villet, Martin H
- Date: 2006
- Language: English
- Type: text , Article
- Identifier: vital:6887 , http://hdl.handle.net/10962/d1011647
- Description: Although workers of Plectroctena mandibularis laid trails with their stings while foraging, the trails appeared to be for individual orientation, because they never recruited nestmates to prey. However, both workers and queens laid trails when recruiting nestmates of either caste to new nest sites. During trail-laying, fluted hairs on the posterior edge of tergite VI were dragged along the ground, presumably applying a pheromone to the substrate. Anatomical and behavioural evidence suggests that pygidial gland secretions moved from the intersegmental pygidial gland between tergites VI and VII into a fingerprint-like, lamellar cuticular reservoir on the pygidium, and from there via the hairs to the substrate. These results suggest that recruitment may be crucial to moving nests but of value only to certain types of foraging, and that recruitment might even have originated in the Formicidae in the context of colony relocation, and then secondarily evolved to assist foraging.
- Full Text:
- Date Issued: 2006
Redress for victims of crime in South Africa: a comparison with selected Commonwealth jurisdictions
- Von Bonde, Johannes Christian
- Authors: Von Bonde, Johannes Christian
- Date: 2006
- Subjects: Victims of crimes -- Legal status, laws, etc. -- South Africa , Reparation (Criminal justice) -- South Africa
- Language: English
- Type: Thesis , Doctoral , LLD
- Identifier: vital:10268 , http://hdl.handle.net/10948/640 , Victims of crimes -- Legal status, laws, etc. -- South Africa , Reparation (Criminal justice) -- South Africa
- Description: In terms of the Constitution every person has the right to freedom and security of the person. This includes the right to be free from all forms of violence from either public or private sources. The state is charged with the duty to protect the individual from such harm. While the Constitution refers to the protection of victims of crime in broad and general terms without indicating how these rights should be protected, it makes meticulous and detailed provision for the rights of arrested, detained and accused persons. This leads to the popular belief that the Constitution protects the criminal and not the victim, engendering public dissatisfaction with the status quo, which is amplified by the fact that South Africa’s current legal dispensation for victims of crime does not embody the requirements of ubuntu and African customary law, which the Constitution declares to be binding on South African courts. This study analyses the means that exist in South African law for the victim of crime to obtain redress for criminal acts and proposes effective avenues through which victims can obtain redress, should the existing machinery prove to be inadequate. The term restitution is used to indicate recompense obtained from the perpetrator, while the term compensation refers to recompense obtained from the state. A comparative study is conducted to ascertain how the legal position of victims of crime in South Africa compares with that of victims of crime in Great Britain, India and New Zealand, respectively. South Africa does not have a state-funded victim compensation scheme such as those which exist in most developed countries. The respective proposals of the South African Law Commission for a victim compensation scheme and revised legislation to deal with offender/victim restitution are considered critically, inter alia, in the light of the findings of the comparative study. Proposals are made regarding changes to the South African legal system to bring it in line with international developments regarding restitution and compensation to victims of crime, attention being given to the meaning, significance and implementation of the doctrine of restorative justice when dealing with the aftermath of criminal injury. In addition to a complete revision of South African legislation dealing with offender/victim restitution, this study recommends the consolidation of the Road Accident Fund and the Compensation Fund operating in terms of the Compensation for Occupational Injuries and Diseases Act. These two bodies should be amalgamated to create a unified Compensation Scheme to compensate victims of crime, as well as victims of traffic and industrial injuries. General qualifying criteria for claimants would be drafted, with specific criteria applying in cases of traffic, industrial and crime related injuries, respectively.
- Full Text:
- Date Issued: 2006
- Authors: Von Bonde, Johannes Christian
- Date: 2006
- Subjects: Victims of crimes -- Legal status, laws, etc. -- South Africa , Reparation (Criminal justice) -- South Africa
- Language: English
- Type: Thesis , Doctoral , LLD
- Identifier: vital:10268 , http://hdl.handle.net/10948/640 , Victims of crimes -- Legal status, laws, etc. -- South Africa , Reparation (Criminal justice) -- South Africa
- Description: In terms of the Constitution every person has the right to freedom and security of the person. This includes the right to be free from all forms of violence from either public or private sources. The state is charged with the duty to protect the individual from such harm. While the Constitution refers to the protection of victims of crime in broad and general terms without indicating how these rights should be protected, it makes meticulous and detailed provision for the rights of arrested, detained and accused persons. This leads to the popular belief that the Constitution protects the criminal and not the victim, engendering public dissatisfaction with the status quo, which is amplified by the fact that South Africa’s current legal dispensation for victims of crime does not embody the requirements of ubuntu and African customary law, which the Constitution declares to be binding on South African courts. This study analyses the means that exist in South African law for the victim of crime to obtain redress for criminal acts and proposes effective avenues through which victims can obtain redress, should the existing machinery prove to be inadequate. The term restitution is used to indicate recompense obtained from the perpetrator, while the term compensation refers to recompense obtained from the state. A comparative study is conducted to ascertain how the legal position of victims of crime in South Africa compares with that of victims of crime in Great Britain, India and New Zealand, respectively. South Africa does not have a state-funded victim compensation scheme such as those which exist in most developed countries. The respective proposals of the South African Law Commission for a victim compensation scheme and revised legislation to deal with offender/victim restitution are considered critically, inter alia, in the light of the findings of the comparative study. Proposals are made regarding changes to the South African legal system to bring it in line with international developments regarding restitution and compensation to victims of crime, attention being given to the meaning, significance and implementation of the doctrine of restorative justice when dealing with the aftermath of criminal injury. In addition to a complete revision of South African legislation dealing with offender/victim restitution, this study recommends the consolidation of the Road Accident Fund and the Compensation Fund operating in terms of the Compensation for Occupational Injuries and Diseases Act. These two bodies should be amalgamated to create a unified Compensation Scheme to compensate victims of crime, as well as victims of traffic and industrial injuries. General qualifying criteria for claimants would be drafted, with specific criteria applying in cases of traffic, industrial and crime related injuries, respectively.
- Full Text:
- Date Issued: 2006
Reflections of South African nurses migrating to the Kingdom of Saudi Arabia a framework for support
- Authors: Telford-Smith, Colette
- Date: 2006
- Subjects: Nurses -- Supply and demand -- Saudi Arabia , Nurses -- Employment -- Foreign countries , Saudi Arabia -- Emigration and immigration , Brain drain -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10017 , http://hdl.handle.net/10948/401 , Nurses -- Supply and demand -- Saudi Arabia , Nurses -- Employment -- Foreign countries , Saudi Arabia -- Emigration and immigration , Brain drain -- South Africa
- Description: The last decade has seen an exodus of South African nurses migrating to "greener pastures". As a result of this migration, the South African Healthcare Service has been drained of one of its most essential resources – nurses. Subsequently, the crippling flight of nurses has thrown the nursing profession into a state of crisis. The Kingdom of Saudi Arabia is one of the more popular destinations for South African nurses, the main reason being the attractive financial rewards. One agency reports that they send an average of thirty nurses a month to various hospitals within the Kingdom of Saudi Arabia. Saudi Arabia is an Islamic country. Due to the uniqueness of the enforcement of the Islamic faith and the Saudi culture, many restrictions are imposed, particularly on women. The challenges and problems facing the South African nurses were, therefore, unique compared to elsewhere in the world. This research study had a primary and a secondary objective: The primary objective of this study was to explore and describe the lived experiences of South African nurses related to living and working in Saudi Arabia; The secondary objective of this study was to develop orientation guidelines to support South African nurses working and living in Saudi Arabia. The researcher utilized a qualitative, explorative, descriptive and contextual design based on a phenomenological approach to inquiry, in an attempt to answer the question: "What are the professional and personal experiences of the South African registered nurses working and living in Saudi Arabia?" Eleven registered nurses were selected to participate by means of purposive sampling. These nurses had been living in Saudi Arabia between three and six months. Consent was obtained from participants and the ethics committee of both the Nelson Mandela Metropolitan University and King Faisal Specialist Hospital and Research Centre. The central theme emanating from the study was recognized as being 'Cultural Diversity'. The sub-themes identified related to the registered nurses’: - Religious/spiritual adaptation - Environmental adaptation - Emotional/psychological adaptation - Professional adaptation Based on the identified themes, guidelines were formulated to assist South African registered nurses when migrating to Saudi Arabia. Utilization of these should assist the South African registered nurse in assimilating into both the cultural and working environment. However, in reality, the outcome showed that no one can be prepared fully for what awaits them in Saudi Arabia.
- Full Text:
- Date Issued: 2006
Reflections of South African nurses migrating to the Kingdom of Saudi Arabia a framework for support
- Authors: Telford-Smith, Colette
- Date: 2006
- Subjects: Nurses -- Supply and demand -- Saudi Arabia , Nurses -- Employment -- Foreign countries , Saudi Arabia -- Emigration and immigration , Brain drain -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10017 , http://hdl.handle.net/10948/401 , Nurses -- Supply and demand -- Saudi Arabia , Nurses -- Employment -- Foreign countries , Saudi Arabia -- Emigration and immigration , Brain drain -- South Africa
- Description: The last decade has seen an exodus of South African nurses migrating to "greener pastures". As a result of this migration, the South African Healthcare Service has been drained of one of its most essential resources – nurses. Subsequently, the crippling flight of nurses has thrown the nursing profession into a state of crisis. The Kingdom of Saudi Arabia is one of the more popular destinations for South African nurses, the main reason being the attractive financial rewards. One agency reports that they send an average of thirty nurses a month to various hospitals within the Kingdom of Saudi Arabia. Saudi Arabia is an Islamic country. Due to the uniqueness of the enforcement of the Islamic faith and the Saudi culture, many restrictions are imposed, particularly on women. The challenges and problems facing the South African nurses were, therefore, unique compared to elsewhere in the world. This research study had a primary and a secondary objective: The primary objective of this study was to explore and describe the lived experiences of South African nurses related to living and working in Saudi Arabia; The secondary objective of this study was to develop orientation guidelines to support South African nurses working and living in Saudi Arabia. The researcher utilized a qualitative, explorative, descriptive and contextual design based on a phenomenological approach to inquiry, in an attempt to answer the question: "What are the professional and personal experiences of the South African registered nurses working and living in Saudi Arabia?" Eleven registered nurses were selected to participate by means of purposive sampling. These nurses had been living in Saudi Arabia between three and six months. Consent was obtained from participants and the ethics committee of both the Nelson Mandela Metropolitan University and King Faisal Specialist Hospital and Research Centre. The central theme emanating from the study was recognized as being 'Cultural Diversity'. The sub-themes identified related to the registered nurses’: - Religious/spiritual adaptation - Environmental adaptation - Emotional/psychological adaptation - Professional adaptation Based on the identified themes, guidelines were formulated to assist South African registered nurses when migrating to Saudi Arabia. Utilization of these should assist the South African registered nurse in assimilating into both the cultural and working environment. However, in reality, the outcome showed that no one can be prepared fully for what awaits them in Saudi Arabia.
- Full Text:
- Date Issued: 2006
Regional calibration of the Pitman model for the Okavango River
- Hughes, Denis A, Andersson, L, Wilk, J, Savenije, H H G
- Authors: Hughes, Denis A , Andersson, L , Wilk, J , Savenije, H H G
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:7085 , http://hdl.handle.net/10962/d1012344
- Description: This paper reports on the application of a monthly rainfall-runoff model for the Okavango River Basin. Streamflow is mainly generated in Angola where the Cuito and Cubango rivers arise. They then join and cross the Namibia/Angola border, flowing into the Okavango wetland in Botswana. The model is a modified version of the Pitman model, including more explicit ground and surface water interactions. Significant limitations in access to climatological data, and lack of sufficiently long records of observed flow for the eastern sub-basins represent great challenges to model calibration. The majority of the runoff is generated in the wetter headwater tributaries, while the lower sub-basins are dominated by channel loss processes with very little incremental flow contributions, even during wet years. The western tributaries show significantly higher seasonal variation in flow, compared to the baseflow dominated eastern tributaries: observations that are consistent with their geological differences. The basin was sub-divided into 24 sub-basins, of which 18 have gauging stations at their outlet. Satisfactory simulations were achieved with sub-basin parameter value differences that correspond to the spatial variability in basin physiographic characteristics. The limited length of historical rainfall and river discharge data over Angola precluded the use of a split sample calibration/validation test. However, satellite generated rainfall data, revised to reflect the same frequency characteristics as the historical rainfall data, were used to validate the model against the available downstream flow data during the 1990s. The overall conclusion is that the model, in spite of the limited data access, adequately represents the hydrological response of the basin and that it can be used to assess the impact of future development scenarios.
- Full Text:
- Date Issued: 2006
- Authors: Hughes, Denis A , Andersson, L , Wilk, J , Savenije, H H G
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:7085 , http://hdl.handle.net/10962/d1012344
- Description: This paper reports on the application of a monthly rainfall-runoff model for the Okavango River Basin. Streamflow is mainly generated in Angola where the Cuito and Cubango rivers arise. They then join and cross the Namibia/Angola border, flowing into the Okavango wetland in Botswana. The model is a modified version of the Pitman model, including more explicit ground and surface water interactions. Significant limitations in access to climatological data, and lack of sufficiently long records of observed flow for the eastern sub-basins represent great challenges to model calibration. The majority of the runoff is generated in the wetter headwater tributaries, while the lower sub-basins are dominated by channel loss processes with very little incremental flow contributions, even during wet years. The western tributaries show significantly higher seasonal variation in flow, compared to the baseflow dominated eastern tributaries: observations that are consistent with their geological differences. The basin was sub-divided into 24 sub-basins, of which 18 have gauging stations at their outlet. Satisfactory simulations were achieved with sub-basin parameter value differences that correspond to the spatial variability in basin physiographic characteristics. The limited length of historical rainfall and river discharge data over Angola precluded the use of a split sample calibration/validation test. However, satellite generated rainfall data, revised to reflect the same frequency characteristics as the historical rainfall data, were used to validate the model against the available downstream flow data during the 1990s. The overall conclusion is that the model, in spite of the limited data access, adequately represents the hydrological response of the basin and that it can be used to assess the impact of future development scenarios.
- Full Text:
- Date Issued: 2006
Registered nurses' knowledge related to the management of patients with diabetic keto-acidosis (DKA)
- Authors: Fourie, René
- Date: 2006
- Subjects: Diabetic acidosis -- Nursing -- South Africa , Nurses -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10046 , http://hdl.handle.net/10948/448 , Diabetic acidosis -- Nursing -- South Africa , Nurses -- South Africa
- Description: Diabetes Mellitus (DM) is on the increase globally, with further increases expected in developing countries, such as South Africa. World Health Organization (Medical Chronicle, 2006:14) estimations indicate that the number of DM sufferers will double over the next 30 years. This increasing number of diabetics is expected to have enormous economical implications. One of the consequences of the increase in DM sufferers is the increase in deaths due to diabetes related complications. In 2000, 3.2 million people died of DM and diabetes related complications compared with 3 million who died from HIV/AIDS related illnesses (William & Pickup, 2004:64). Health services are financially burdened by DM complications that result in heavy demands in both direct costs of hospitalization and medication as well as indirect costs such as manpower of staff involved in the care of the patient (Leuner, 2000:410). Diabetic ketoacidosis (DKA) is a prominent life-threatening complication of type 1 diabetes mellitus and, if not treated medically, it can lead to coma and death. DKA accounts for 14 per cent of all diabetic related hospital admissions and has a mortality rate of 5 to 10 per cent (Pickup & Williams, 2003:1). Rapid identification of DKA is necessary to improve patient care. George- Gray and Chernecky (2002:96) suggest patient outcomes are affected by the nurse’s ability to recognize the clinical features of DKA. It is important, therefore, for the nurses to understand the signs and symptoms and treatment of this diabetes related complication. National health policies and treatment guidelines should be aimed at addressing DKA treatment through setting guidelines for diabetic care (Peters, 2004:22). The main goal of this study was to determine registered nurses’ knowledge of DKA and to develop guidelines to assist registered nurses in providing adequate and effective health care to prevent DKA reoccurrence. The research study is based pm Bergam’s model on quality of care and accountability. Bergman claims that several preconditions must be filled in order to be accountable, including: • Accountability • Responsibility • Authority • Ability (Bergman (1982:8) emphasizes that ability reflects the registered nurses’ accountability, which is composed of values, knowledge and skills.) The study was divided into two phases. Phase one determined registered nurses’ knowledge related to the management of DKA. Phase two of the study included the developing guidelines to assist registered nurses in providing adequate and effective health care to patients with DKA. The design of the study is quantitative, explorative, descriptive and contextual; a survey was performed using a questionnaire based on a literature study. Ethical principals were maintained throughout the study. Permission to the study was sought from the Local Health Authorities and the heads of department where the research was undertaken. Findings of the research were analysed and discussed in the research. The knowledge of the majority of the respondents was found to be average. Out of the thirty- two respondents 52.8 percent possessed adequate knowledge the management of DKA and 63.4 percent possessed adequate knowledge on the management of DM. Two recommendations to assist registered nurses in the implementation of guidelines of the recommendations were also provided.
- Full Text:
- Date Issued: 2006
Registered nurses' knowledge related to the management of patients with diabetic keto-acidosis (DKA)
- Authors: Fourie, René
- Date: 2006
- Subjects: Diabetic acidosis -- Nursing -- South Africa , Nurses -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10046 , http://hdl.handle.net/10948/448 , Diabetic acidosis -- Nursing -- South Africa , Nurses -- South Africa
- Description: Diabetes Mellitus (DM) is on the increase globally, with further increases expected in developing countries, such as South Africa. World Health Organization (Medical Chronicle, 2006:14) estimations indicate that the number of DM sufferers will double over the next 30 years. This increasing number of diabetics is expected to have enormous economical implications. One of the consequences of the increase in DM sufferers is the increase in deaths due to diabetes related complications. In 2000, 3.2 million people died of DM and diabetes related complications compared with 3 million who died from HIV/AIDS related illnesses (William & Pickup, 2004:64). Health services are financially burdened by DM complications that result in heavy demands in both direct costs of hospitalization and medication as well as indirect costs such as manpower of staff involved in the care of the patient (Leuner, 2000:410). Diabetic ketoacidosis (DKA) is a prominent life-threatening complication of type 1 diabetes mellitus and, if not treated medically, it can lead to coma and death. DKA accounts for 14 per cent of all diabetic related hospital admissions and has a mortality rate of 5 to 10 per cent (Pickup & Williams, 2003:1). Rapid identification of DKA is necessary to improve patient care. George- Gray and Chernecky (2002:96) suggest patient outcomes are affected by the nurse’s ability to recognize the clinical features of DKA. It is important, therefore, for the nurses to understand the signs and symptoms and treatment of this diabetes related complication. National health policies and treatment guidelines should be aimed at addressing DKA treatment through setting guidelines for diabetic care (Peters, 2004:22). The main goal of this study was to determine registered nurses’ knowledge of DKA and to develop guidelines to assist registered nurses in providing adequate and effective health care to prevent DKA reoccurrence. The research study is based pm Bergam’s model on quality of care and accountability. Bergman claims that several preconditions must be filled in order to be accountable, including: • Accountability • Responsibility • Authority • Ability (Bergman (1982:8) emphasizes that ability reflects the registered nurses’ accountability, which is composed of values, knowledge and skills.) The study was divided into two phases. Phase one determined registered nurses’ knowledge related to the management of DKA. Phase two of the study included the developing guidelines to assist registered nurses in providing adequate and effective health care to patients with DKA. The design of the study is quantitative, explorative, descriptive and contextual; a survey was performed using a questionnaire based on a literature study. Ethical principals were maintained throughout the study. Permission to the study was sought from the Local Health Authorities and the heads of department where the research was undertaken. Findings of the research were analysed and discussed in the research. The knowledge of the majority of the respondents was found to be average. Out of the thirty- two respondents 52.8 percent possessed adequate knowledge the management of DKA and 63.4 percent possessed adequate knowledge on the management of DM. Two recommendations to assist registered nurses in the implementation of guidelines of the recommendations were also provided.
- Full Text:
- Date Issued: 2006
Registered nurses' perceptions of factors causing stress in the intensive care environment in state hospitals
- Authors: Beau, S P
- Date: 2006
- Subjects: Intensive care nursing -- South Africa , Nurses -- Job stress -- South Africa , Stress management -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10044 , http://hdl.handle.net/10948/457 , Intensive care nursing -- South Africa , Nurses -- Job stress -- South Africa , Stress management -- South Africa
- Description: The complex environment of an intensive care unit is associated with a considerable amount of stress. Intensive care nurses are confronted daily with increasing work demands, emanating from the growing numbers of critically-ill patients; the introduction of highly sophisticated technologies in the intensive care environment; increasing competition between health care institutions; increased work loads; and limited career opportunities caused by, among other things, budget cuts by the government (Janssen, De Jonge & Bakker, 1999:1360). Research has shown that such stressors can result in mental, physical and behavioural stress reactions among nurses (Demerouti, Bakker, Nachreiner and Schaufeli, 2000:454). The objective of this study is to explore and describe registered nurses’ perceptions of factors causing stress in intensive care environments of state hospitals. The main purpose of the study is to develop guidelines for a stress management programme, to assist registered nurses to cope with the stressors in an intensive care environment. The research design is placed within a quantitative, explorative and descriptive contextual framework. Validity and reliability in testing and evaluating the research questionnaire are discussed, as well as the ethical and legal considerations relating to this research study. Findings of the research study will be utilized to assist the researcher in developing guidelines for a stress management programme to assist registered nurses in coping with stress in an intensive care environment
- Full Text:
- Date Issued: 2006
- Authors: Beau, S P
- Date: 2006
- Subjects: Intensive care nursing -- South Africa , Nurses -- Job stress -- South Africa , Stress management -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10044 , http://hdl.handle.net/10948/457 , Intensive care nursing -- South Africa , Nurses -- Job stress -- South Africa , Stress management -- South Africa
- Description: The complex environment of an intensive care unit is associated with a considerable amount of stress. Intensive care nurses are confronted daily with increasing work demands, emanating from the growing numbers of critically-ill patients; the introduction of highly sophisticated technologies in the intensive care environment; increasing competition between health care institutions; increased work loads; and limited career opportunities caused by, among other things, budget cuts by the government (Janssen, De Jonge & Bakker, 1999:1360). Research has shown that such stressors can result in mental, physical and behavioural stress reactions among nurses (Demerouti, Bakker, Nachreiner and Schaufeli, 2000:454). The objective of this study is to explore and describe registered nurses’ perceptions of factors causing stress in intensive care environments of state hospitals. The main purpose of the study is to develop guidelines for a stress management programme, to assist registered nurses to cope with the stressors in an intensive care environment. The research design is placed within a quantitative, explorative and descriptive contextual framework. Validity and reliability in testing and evaluating the research questionnaire are discussed, as well as the ethical and legal considerations relating to this research study. Findings of the research study will be utilized to assist the researcher in developing guidelines for a stress management programme to assist registered nurses in coping with stress in an intensive care environment
- Full Text:
- Date Issued: 2006
Relationship between employee performance, leadership and emotional intelligence in a South African parastatal organisation
- Authors: Hayward, Brett Anthony
- Date: 2006
- Subjects: Employees -- Rating of , Leadership , Leadership -- Psychological aspects , Emotional intelligence , Government business enterprises -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1206 , http://hdl.handle.net/10962/d1019740
- Description: This research investigates the relationship between employee performance, leadership and emotional intelligence in a South African parastatal. The literature provided discusses the three variables of performance, leadership and emotional intelligence. Information was gathered, using three instruments, from a sample of 160 leaders and 800 raters. The Multifactor Leadership Questionnaire was used to determine leadership style within the parastatal, while the Emotional Competency Profiler was used to determine the emotional intelligence of the leaders within the parastatal. Employee performance was captured and recorded using the parastatal’s performance appraisal process. Leadership and emotional intelligence were identified as the independent variables and employee performance as the dependent variable. Data obtained from each of the research instruments was then statistically analysed. Through linear regression analysis it was concluded that there is a significant relationship between employee performance and an emotionally intelligent, transactional leader. However, no significant linear relationship was found between employee performance and an emotionally intelligent, transformational leader. Simple correlation analysis showed that there is a relatively weak significant linear relationship between emotional intelligence and transactional leadership. Moreover, it was found that there is a very strong significant linear relationship between emotional intelligence and transformational leadership. This research therefore adds a new dimension to employee performance, leadership and emotional intelligence, since no similar study has been conducted. As this research takes place in the South African context, it contributes to the bank of findings relating to the concepts.
- Full Text:
- Date Issued: 2006
- Authors: Hayward, Brett Anthony
- Date: 2006
- Subjects: Employees -- Rating of , Leadership , Leadership -- Psychological aspects , Emotional intelligence , Government business enterprises -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1206 , http://hdl.handle.net/10962/d1019740
- Description: This research investigates the relationship between employee performance, leadership and emotional intelligence in a South African parastatal. The literature provided discusses the three variables of performance, leadership and emotional intelligence. Information was gathered, using three instruments, from a sample of 160 leaders and 800 raters. The Multifactor Leadership Questionnaire was used to determine leadership style within the parastatal, while the Emotional Competency Profiler was used to determine the emotional intelligence of the leaders within the parastatal. Employee performance was captured and recorded using the parastatal’s performance appraisal process. Leadership and emotional intelligence were identified as the independent variables and employee performance as the dependent variable. Data obtained from each of the research instruments was then statistically analysed. Through linear regression analysis it was concluded that there is a significant relationship between employee performance and an emotionally intelligent, transactional leader. However, no significant linear relationship was found between employee performance and an emotionally intelligent, transformational leader. Simple correlation analysis showed that there is a relatively weak significant linear relationship between emotional intelligence and transactional leadership. Moreover, it was found that there is a very strong significant linear relationship between emotional intelligence and transformational leadership. This research therefore adds a new dimension to employee performance, leadership and emotional intelligence, since no similar study has been conducted. As this research takes place in the South African context, it contributes to the bank of findings relating to the concepts.
- Full Text:
- Date Issued: 2006
Relationships between social marketing strategies and school participation in environmental competitions: a case study of Collect-a-Can's annual schools competition
- Authors: Mathabathe, Andrew Tumishe
- Date: 2006
- Subjects: Social marketing -- South Africa Environmental education -- South Africa Recycling (Waste, etc.) -- South Africa School recycling programs -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1726 , http://hdl.handle.net/10962/d1003609
- Description: The South African formal education system has undergone many changes since the formulation of the White Paper on Education and Training in 1995. These developments challenge organisations that want to run successful programmes or projects in schools to adapt their social marketing strategies. Against this background, the aim of the study was to investigate the relationships between social marketing strategies and participation of schools in environmental competitions. The goals of the research were to identify issues that have influenced schools participation in the Collect-a-Can Annual Schools Competition, identify and review social marketing strategies used by Collect-a-Can to influence participation of schools in the competition, and identify relationships between issues that influenced school participation in the competition and the Collect-a-Can’s social marketing strategies. A qualitative design that applied an interpretative case study, which focused on the Collect-a-Can’s Annual Schools Competition was used to explore these relationships. Data was generated through interviews, document analysis and a workshop. Nine respondents from nine schools and three Collect-a-Can management staff members participated in the interview process. Twenty participants from twenty schools participated in the workshop. The findings of the research revealed that there were relationships between the social marketing strategies used by Collect-a-Can and participation of schools in the competition. These relationships were found to be linked mainly to policy changes within formal education which Collect-a-Can could not respond to as a result of various reasons which included among others, the core focus of thecompany, lack of funds and a need to operate in a cost-effective way. The recommendations indicate possible areas for improvement and guidelines which could be used by Collect-a-Can for the competition without digressing from its core focus or incurring additional costs. These include a more responsive and adaptive management approach and a stronger educational orientation.
- Full Text:
- Date Issued: 2006
- Authors: Mathabathe, Andrew Tumishe
- Date: 2006
- Subjects: Social marketing -- South Africa Environmental education -- South Africa Recycling (Waste, etc.) -- South Africa School recycling programs -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1726 , http://hdl.handle.net/10962/d1003609
- Description: The South African formal education system has undergone many changes since the formulation of the White Paper on Education and Training in 1995. These developments challenge organisations that want to run successful programmes or projects in schools to adapt their social marketing strategies. Against this background, the aim of the study was to investigate the relationships between social marketing strategies and participation of schools in environmental competitions. The goals of the research were to identify issues that have influenced schools participation in the Collect-a-Can Annual Schools Competition, identify and review social marketing strategies used by Collect-a-Can to influence participation of schools in the competition, and identify relationships between issues that influenced school participation in the competition and the Collect-a-Can’s social marketing strategies. A qualitative design that applied an interpretative case study, which focused on the Collect-a-Can’s Annual Schools Competition was used to explore these relationships. Data was generated through interviews, document analysis and a workshop. Nine respondents from nine schools and three Collect-a-Can management staff members participated in the interview process. Twenty participants from twenty schools participated in the workshop. The findings of the research revealed that there were relationships between the social marketing strategies used by Collect-a-Can and participation of schools in the competition. These relationships were found to be linked mainly to policy changes within formal education which Collect-a-Can could not respond to as a result of various reasons which included among others, the core focus of thecompany, lack of funds and a need to operate in a cost-effective way. The recommendations indicate possible areas for improvement and guidelines which could be used by Collect-a-Can for the competition without digressing from its core focus or incurring additional costs. These include a more responsive and adaptive management approach and a stronger educational orientation.
- Full Text:
- Date Issued: 2006
Reporting non-stop violence in South Africa: the necessity for adopting a different kind of journalism
- Garman, Anthea, Mbaine, Adolf
- Authors: Garman, Anthea , Mbaine, Adolf
- Date: 2006
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/159702 , vital:40334 , ISBN 978-9970025367
- Description: The role of the media and media reportage is crucial to any conflict situation. In Uganda, the Department of Mass Communication at Makerere University has endeavoured to support constructive reporting of the various conflicts that have beset the country and the region in the past decades. As part of this effort, it has organised lectures and commissioned research by media professionals and academic observers, whose work is brought together in this collection of essays.
- Full Text:
- Date Issued: 2006
- Authors: Garman, Anthea , Mbaine, Adolf
- Date: 2006
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/159702 , vital:40334 , ISBN 978-9970025367
- Description: The role of the media and media reportage is crucial to any conflict situation. In Uganda, the Department of Mass Communication at Makerere University has endeavoured to support constructive reporting of the various conflicts that have beset the country and the region in the past decades. As part of this effort, it has organised lectures and commissioned research by media professionals and academic observers, whose work is brought together in this collection of essays.
- Full Text:
- Date Issued: 2006
Repositioning Renaissance studies in South Africa: strategic thinking or 'business-as-usual
- Authors: Wright, Laurence
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:7054 , http://hdl.handle.net/10962/d1007415
- Description: Increasingly, in many leading South African tertiary departments of literature, early modern studies have a fairly slim hold on the core curriculum. More and more, departmental offerings concentrate on nineteenth and twentieth century literature, perhaps in the belief either that today’s students are so poorly prepared that they will never be able to cope with the mental shifts necessary to appreciate pre-industrial literature and its language, or, worse, that nothing before the C19 colonial incursion into South Africa can really matter very much to undergraduates. Whatever the reason, in such departments, it is no longer possible to get to grips with the contribution of the renaissance to the formation of the modern world. The significance of the broader nomenclature, early modern studies, doesn’t appear to strike home, especially the point that, if students want to understand the world we live in, they have to know this period particularly well. Indeed, they need to have some idea of the interaction between early modern Europe and the literature and ideas of the ancient civilizations of Rome and Greece. If we fail them in this regard, as I believe we are doing to an increasing extent, the result will be generations of intellectual sleepwalkers, denizens of mental landscapes they are responding to, or ‘reading’, in terms of an inner life unaware of important historical continuities and disjunctions; cut off, moreover, from understanding essential features of modernity.
- Full Text:
- Date Issued: 2006
- Authors: Wright, Laurence
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:7054 , http://hdl.handle.net/10962/d1007415
- Description: Increasingly, in many leading South African tertiary departments of literature, early modern studies have a fairly slim hold on the core curriculum. More and more, departmental offerings concentrate on nineteenth and twentieth century literature, perhaps in the belief either that today’s students are so poorly prepared that they will never be able to cope with the mental shifts necessary to appreciate pre-industrial literature and its language, or, worse, that nothing before the C19 colonial incursion into South Africa can really matter very much to undergraduates. Whatever the reason, in such departments, it is no longer possible to get to grips with the contribution of the renaissance to the formation of the modern world. The significance of the broader nomenclature, early modern studies, doesn’t appear to strike home, especially the point that, if students want to understand the world we live in, they have to know this period particularly well. Indeed, they need to have some idea of the interaction between early modern Europe and the literature and ideas of the ancient civilizations of Rome and Greece. If we fail them in this regard, as I believe we are doing to an increasing extent, the result will be generations of intellectual sleepwalkers, denizens of mental landscapes they are responding to, or ‘reading’, in terms of an inner life unaware of important historical continuities and disjunctions; cut off, moreover, from understanding essential features of modernity.
- Full Text:
- Date Issued: 2006
Research portfolio
- Authors: Shaanika, E N
- Date: 2006
- Subjects: Education -- Namibia Arts -- Study and teaching -- Namibia Culture -- Study and teaching -- Namibia Teachers -- Training of -- Namibia Curriculum planning -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1735 , http://hdl.handle.net/10962/d1003618
- Description: This study is a contextual analysis and evaluation of the Arts-in-Culture curriculum at Ongwediva College of Education. Arts-in-Culture is one of the core subjects in the Basic Education Teacher Diploma (BETD)’s Broad Curriculum. At colleges such as Ongwediva, Caprivi and Rundu, student teachers study Arts as a core subject, while at Windhoek College of Education it can be studied as either a major or a core subject. In this study, I have raised some questions: Why is it that at Ongwediva College, the status of Arts-in-Culture is still low in comparison to other curriculum subjects like sciences and languages? Do student teachers and teacher educators fully understand how to assess the subject? Is the syllabus open for everyone? Is the learning environment conducive to offering the subject? Do the syllabus; learning environment, teacher educators and student teachers promote the goals of education for all? This study first gives the historical background of the subject. The background is of a diverse nature, namely African Indigenous Arts education, Black Arts education under the missionaries, Black Arts education under the South Africa Regime and Arts Education in the current Namibian reform dispensation. Second, the data collecting methodologies of this study are discussed. This includes how I collected information, who I contacted to collect this information, the tools I used to collect data, when and where I used them, why they were used and how they were used, the difficulties or problems I encountered and what I have learned about myself during the process. The third part of this study is the analysis of my findings from the participants interviewed and the fourth is how I have tried to link these different sections together. The last part of the paper is my conclusion.
- Full Text:
- Date Issued: 2006
- Authors: Shaanika, E N
- Date: 2006
- Subjects: Education -- Namibia Arts -- Study and teaching -- Namibia Culture -- Study and teaching -- Namibia Teachers -- Training of -- Namibia Curriculum planning -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1735 , http://hdl.handle.net/10962/d1003618
- Description: This study is a contextual analysis and evaluation of the Arts-in-Culture curriculum at Ongwediva College of Education. Arts-in-Culture is one of the core subjects in the Basic Education Teacher Diploma (BETD)’s Broad Curriculum. At colleges such as Ongwediva, Caprivi and Rundu, student teachers study Arts as a core subject, while at Windhoek College of Education it can be studied as either a major or a core subject. In this study, I have raised some questions: Why is it that at Ongwediva College, the status of Arts-in-Culture is still low in comparison to other curriculum subjects like sciences and languages? Do student teachers and teacher educators fully understand how to assess the subject? Is the syllabus open for everyone? Is the learning environment conducive to offering the subject? Do the syllabus; learning environment, teacher educators and student teachers promote the goals of education for all? This study first gives the historical background of the subject. The background is of a diverse nature, namely African Indigenous Arts education, Black Arts education under the missionaries, Black Arts education under the South Africa Regime and Arts Education in the current Namibian reform dispensation. Second, the data collecting methodologies of this study are discussed. This includes how I collected information, who I contacted to collect this information, the tools I used to collect data, when and where I used them, why they were used and how they were used, the difficulties or problems I encountered and what I have learned about myself during the process. The third part of this study is the analysis of my findings from the participants interviewed and the fourth is how I have tried to link these different sections together. The last part of the paper is my conclusion.
- Full Text:
- Date Issued: 2006
Restoring trust by verifying information integrity through continuous auditing
- Authors: Flowerday, Stephen
- Date: 2006
- Subjects: Auditing, Internal , Corporate governance
- Language: English
- Type: Thesis , Doctoral , DTech
- Identifier: vital:9796 , http://hdl.handle.net/10948/504 , http://hdl.handle.net/10948/d1011920 , Auditing, Internal , Corporate governance
- Description: Corporate scandals such as Enron, WorldCom and Parmalat, have focused recent governance efforts in the domain of financial reporting due to fraudulent and/or erroneous accounting practices. In addition, the ineffectiveness of the current system of controls has been highlighted, including that some directors have been weak and ineffective monitors of managers. This board of director ‘weakness’ has called for additional mechanisms for monitoring and controlling of management, focusing on financial reporting. This problem intensifies in that today companies function in real-time, and decisions are based on available realtime financial information. However, the assurances provided by traditional auditing take place months after the transactions have occurred and therefore, a trust problem arises because information is not verified in real-time. Consequently, the errors and fraud concealed within the financial information is not discovered until months later. To address this trust problem a conceptual causal model is proposed in this study based on the principles of systems theory. The emergent property of the causal model is increased trust and control. This study establishes that mutual assurances assist in building trust and that information security assists in safeguarding trust. Subsequently, in order to have a positive relationship between the company directors and various stakeholders, uncertainty needs to be contained, and the level of trust needs to surpass the perceived risks. The study concludes that assurances need to be provided in real-time to restore stakeholder confidence and trust in the domain of financial reporting. In order to provide assurances in real-time, continuous auditing is required to verify the integrity of financial information when it becomes available, and not months later. A continuous auditing process has its foundations grounded in information technology and attends to the challenges in real-time by addressing the standardisation of data to enable effective analysis, the validation of the accuracy of the data and the reliability of the system.
- Full Text:
- Date Issued: 2006
- Authors: Flowerday, Stephen
- Date: 2006
- Subjects: Auditing, Internal , Corporate governance
- Language: English
- Type: Thesis , Doctoral , DTech
- Identifier: vital:9796 , http://hdl.handle.net/10948/504 , http://hdl.handle.net/10948/d1011920 , Auditing, Internal , Corporate governance
- Description: Corporate scandals such as Enron, WorldCom and Parmalat, have focused recent governance efforts in the domain of financial reporting due to fraudulent and/or erroneous accounting practices. In addition, the ineffectiveness of the current system of controls has been highlighted, including that some directors have been weak and ineffective monitors of managers. This board of director ‘weakness’ has called for additional mechanisms for monitoring and controlling of management, focusing on financial reporting. This problem intensifies in that today companies function in real-time, and decisions are based on available realtime financial information. However, the assurances provided by traditional auditing take place months after the transactions have occurred and therefore, a trust problem arises because information is not verified in real-time. Consequently, the errors and fraud concealed within the financial information is not discovered until months later. To address this trust problem a conceptual causal model is proposed in this study based on the principles of systems theory. The emergent property of the causal model is increased trust and control. This study establishes that mutual assurances assist in building trust and that information security assists in safeguarding trust. Subsequently, in order to have a positive relationship between the company directors and various stakeholders, uncertainty needs to be contained, and the level of trust needs to surpass the perceived risks. The study concludes that assurances need to be provided in real-time to restore stakeholder confidence and trust in the domain of financial reporting. In order to provide assurances in real-time, continuous auditing is required to verify the integrity of financial information when it becomes available, and not months later. A continuous auditing process has its foundations grounded in information technology and attends to the challenges in real-time by addressing the standardisation of data to enable effective analysis, the validation of the accuracy of the data and the reliability of the system.
- Full Text:
- Date Issued: 2006
Restructuring manufacturing in South Africa's lagging regions : the case of the Free State
- Nel, Etienne L, Rogerson, C M, Marais, L
- Authors: Nel, Etienne L , Rogerson, C M , Marais, L
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6714 , http://hdl.handle.net/10962/d1006786
- Description: The manufacturing economy of the Free State reflects both historical dependence on locally available raw materials and high-levels of state intervention, in terms of support for import substitution and Homeland development. In the contemporary era, deindustrialization, the uncertain future of the clothing / textile industries and limited growth over the last ten years, suggests that, in terms of manufacturing, the Free State is a 'lagging' region. While there has been significant expansion in the number of small firms, this is not matched by employment growth and does not compensate for the loss of many large firms and economic downscaling in the Goldfields. Key sectors such as petro-chemicals and gold jewellery present certain opportunities for future growth.
- Full Text:
- Date Issued: 2006
- Authors: Nel, Etienne L , Rogerson, C M , Marais, L
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6714 , http://hdl.handle.net/10962/d1006786
- Description: The manufacturing economy of the Free State reflects both historical dependence on locally available raw materials and high-levels of state intervention, in terms of support for import substitution and Homeland development. In the contemporary era, deindustrialization, the uncertain future of the clothing / textile industries and limited growth over the last ten years, suggests that, in terms of manufacturing, the Free State is a 'lagging' region. While there has been significant expansion in the number of small firms, this is not matched by employment growth and does not compensate for the loss of many large firms and economic downscaling in the Goldfields. Key sectors such as petro-chemicals and gold jewellery present certain opportunities for future growth.
- Full Text:
- Date Issued: 2006
Review of the African distribution of the brine shrimp genus Artemia
- Kaiser, Horst, Gordon, Andrew K, Paulet, T G
- Authors: Kaiser, Horst , Gordon, Andrew K , Paulet, T G
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6765 , http://hdl.handle.net/10962/d1007963
- Description: Brine shrimp (genus Artemia) are small (8 to 12 mm long) cosmopolitan crustaceans (Anostraca) found predominately in hypersaline water bodies such as inland salt lakes and pans, coastal lagoons, and salt works at salinity levels above 40 g(.)l[superscript(-1)]. They have been extensively studied due to their high monetary value as food for larval fish in aquaculture and their unique reproductive strategies. Brine shrimp occur as either bisexual species or as parthenogenetic populations. Despite published reviews of their world-wide distribution little is known about their occurrence in Africa. This review adds new information about 70 African Artemia sites and lists 26 potential sites and their coordinates. Sixteen sites in Southern Africa and Namibia were visited during a collecting trip, and new information on the reproductive mode of nine of these sites is given. Several South African populations exhibit bisexual reproduction. In Namibia there are two parthenogenetic populations (Walvis Bay and Swartkops) and an additional bisexual population (Hentie's Bay). A mixed population (bisexual and parthenogenetic reproduction at the same site) was found at Coega, South Africa.
- Full Text:
- Date Issued: 2006
- Authors: Kaiser, Horst , Gordon, Andrew K , Paulet, T G
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6765 , http://hdl.handle.net/10962/d1007963
- Description: Brine shrimp (genus Artemia) are small (8 to 12 mm long) cosmopolitan crustaceans (Anostraca) found predominately in hypersaline water bodies such as inland salt lakes and pans, coastal lagoons, and salt works at salinity levels above 40 g(.)l[superscript(-1)]. They have been extensively studied due to their high monetary value as food for larval fish in aquaculture and their unique reproductive strategies. Brine shrimp occur as either bisexual species or as parthenogenetic populations. Despite published reviews of their world-wide distribution little is known about their occurrence in Africa. This review adds new information about 70 African Artemia sites and lists 26 potential sites and their coordinates. Sixteen sites in Southern Africa and Namibia were visited during a collecting trip, and new information on the reproductive mode of nine of these sites is given. Several South African populations exhibit bisexual reproduction. In Namibia there are two parthenogenetic populations (Walvis Bay and Swartkops) and an additional bisexual population (Hentie's Bay). A mixed population (bisexual and parthenogenetic reproduction at the same site) was found at Coega, South Africa.
- Full Text:
- Date Issued: 2006
Rhodes University Graduation Ceremony 2006
- Authors: Rhodes University
- Date: 2006
- Language: English
- Type: text
- Identifier: vital:8141 , http://hdl.handle.net/10962/d1007254
- Description: Rhodes University Graduation Ceremonies [at] 1820 Settlers National Monument Thursday, 6 April 2006 at 18.00 [and] Friday, 7 April 2006 at 10:30; 14:30 & 18:00 [and] Saturday, 8 April 2006 at 10:30 , Inauguration Ceremony [of] Dr Saleem Badat [as] Principal and Vice-Chancellor [at the] 1820 Settlers National Monument [on] Wednesday, 27 September 2006 at 18:15.
- Full Text:
- Date Issued: 2006
- Authors: Rhodes University
- Date: 2006
- Language: English
- Type: text
- Identifier: vital:8141 , http://hdl.handle.net/10962/d1007254
- Description: Rhodes University Graduation Ceremonies [at] 1820 Settlers National Monument Thursday, 6 April 2006 at 18.00 [and] Friday, 7 April 2006 at 10:30; 14:30 & 18:00 [and] Saturday, 8 April 2006 at 10:30 , Inauguration Ceremony [of] Dr Saleem Badat [as] Principal and Vice-Chancellor [at the] 1820 Settlers National Monument [on] Wednesday, 27 September 2006 at 18:15.
- Full Text:
- Date Issued: 2006
Rhodes University Research Report 2006
- Authors: Rhodes University
- Date: 2006
- Language: English
- Type: Text
- Identifier: vital:561 , http://hdl.handle.net/10962/d1011954
- Description: [From Preface] Rhodes University defines as one of its three core activities the production of knowledge through stimulating imaginative and rigorous research of all kinds (fundamental, applied, policy-oriented, etc.), and in all disciplines and fields. Though a small university with less than 6 000 students, the student profile and research output (publications, Master’s and Doctoral graduates) of Rhodes ensures that it occupies a distinctive place in the overall South African higher education landscape. For one, almost 25% of Rhodes’ students are postgraduates. Coming from a diversity of countries, these postgraduates ensure that Rhodes is a cosmopolitan and fertile environment of thinking and ideas. For another, Rhodes has the best research output of all South African universities, a testimony to the dedication and passion of its academics for research and the commitment of the University to nurture and cultivate knowledge production of all kinds. During 2006, Rhodes academics published 113 books and book chapters, 312 articles, and contributed 636 papers to conferences. One hundred and seventy students graduated with Master’s degrees and 47 with Doctorates. In a number of areas Rhodes’ academics are at the cutting-edge of research, pushing the frontiers knowledge production. The award of a Department of Science and Technology sponsored Research Chair in Chemistry to Professor Nyokong is one indicator of national recognition of this reality. Rhodes researchers are at the forefront of a number of national projects, and also continue to attract research funding from a variety of international and national research agencies and industry. Rhodes possesses an admirable research culture, and provides the intellectual space for the flourishing and debate of ideas, as evidenced by the number and diversity of seminars, public lectures, and the quality of local and international academics that visit Rhodes. A number of Rhodes academics also make important contributions to national public debate, enhancing the visibility of Rhodes in the intellectual life of South Africa. Rhodes University is committed to maintain and, in the years to come, to enhance its research output, to broaden its research base, to bring on steam new generations of researchers (who are also increasing women and black), and to continue being a distinctive South African university in the domain of knowledge production.
- Full Text:
- Date Issued: 2006
- Authors: Rhodes University
- Date: 2006
- Language: English
- Type: Text
- Identifier: vital:561 , http://hdl.handle.net/10962/d1011954
- Description: [From Preface] Rhodes University defines as one of its three core activities the production of knowledge through stimulating imaginative and rigorous research of all kinds (fundamental, applied, policy-oriented, etc.), and in all disciplines and fields. Though a small university with less than 6 000 students, the student profile and research output (publications, Master’s and Doctoral graduates) of Rhodes ensures that it occupies a distinctive place in the overall South African higher education landscape. For one, almost 25% of Rhodes’ students are postgraduates. Coming from a diversity of countries, these postgraduates ensure that Rhodes is a cosmopolitan and fertile environment of thinking and ideas. For another, Rhodes has the best research output of all South African universities, a testimony to the dedication and passion of its academics for research and the commitment of the University to nurture and cultivate knowledge production of all kinds. During 2006, Rhodes academics published 113 books and book chapters, 312 articles, and contributed 636 papers to conferences. One hundred and seventy students graduated with Master’s degrees and 47 with Doctorates. In a number of areas Rhodes’ academics are at the cutting-edge of research, pushing the frontiers knowledge production. The award of a Department of Science and Technology sponsored Research Chair in Chemistry to Professor Nyokong is one indicator of national recognition of this reality. Rhodes researchers are at the forefront of a number of national projects, and also continue to attract research funding from a variety of international and national research agencies and industry. Rhodes possesses an admirable research culture, and provides the intellectual space for the flourishing and debate of ideas, as evidenced by the number and diversity of seminars, public lectures, and the quality of local and international academics that visit Rhodes. A number of Rhodes academics also make important contributions to national public debate, enhancing the visibility of Rhodes in the intellectual life of South Africa. Rhodes University is committed to maintain and, in the years to come, to enhance its research output, to broaden its research base, to bring on steam new generations of researchers (who are also increasing women and black), and to continue being a distinctive South African university in the domain of knowledge production.
- Full Text:
- Date Issued: 2006
Rhodes University, Department of Ichthyology and Fisheries Science: Research Report series 18
- Authors: Jones, C L W
- Date: 2006
- Language: English
- Type: Book
- Identifier: vital:7160 , http://hdl.handle.net/10962/d1011934
- Full Text:
- Date Issued: 2006
- Authors: Jones, C L W
- Date: 2006
- Language: English
- Type: Book
- Identifier: vital:7160 , http://hdl.handle.net/10962/d1011934
- Full Text:
- Date Issued: 2006
Sand stress as a non-determinant of habitat segregation of indigenous (Perna perna) and invasive (Mytilus galloprovincialis) mussels in South Africa
- Zardi, Gerardo I, Nicastro, Katy R, Porri, Francesca, McQuaid, Christopher D
- Authors: Zardi, Gerardo I , Nicastro, Katy R , Porri, Francesca , McQuaid, Christopher D
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6946 , http://hdl.handle.net/10962/d1011974
- Description: Periodical sand inundation influences diversity and distribution of intertidal species throughout the world. This study investigates the effect of sand stress on survival and on habitat segregation of the two dominant mussel species living in South Africa, the invasive Mytilus galloprovincialis and the indigenous Perna perna. P. perna occupies a lower intertidal zone which, monthly surveys over 1.5 years showed, is covered by sand for longer periods than the higher M. galloprovincialis zone. Despite this, when buried under sand, P. perna mortality rates were significantly higher than those of M. galloprovincialis in both laboratory and in field experiments. Under anoxic condition, P. perna mortality rates were still significantly higher than those for M. galloprovincialis, but both species died later than when exposed to sand burial, underlining the importance of the physical action of sand on mussel internal organs. When buried, both species accumulate sediments within the shell valves while still alive, but the quantities are much greater for P. perna. This suggests that P. perna gills are more severely damaged by sand abrasion and could explain its higher mortality rates. M. galloprovincialis has longer labial palps than P. perna, indicating a higher particle sorting ability and consequently explaining its lower mortality rates when exposed to sand in suspension. Habitat segregation is often explained by physiological tolerances, but in this case, such explanations fail. Although sand stress strongly affects the survival of the two species, it does not explain their vertical zonation. Contrary to our expectations, the species that is less well adapted to cope with sand stress maintains dominance in a habitat where such stress is high.
- Full Text:
- Date Issued: 2006
- Authors: Zardi, Gerardo I , Nicastro, Katy R , Porri, Francesca , McQuaid, Christopher D
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6946 , http://hdl.handle.net/10962/d1011974
- Description: Periodical sand inundation influences diversity and distribution of intertidal species throughout the world. This study investigates the effect of sand stress on survival and on habitat segregation of the two dominant mussel species living in South Africa, the invasive Mytilus galloprovincialis and the indigenous Perna perna. P. perna occupies a lower intertidal zone which, monthly surveys over 1.5 years showed, is covered by sand for longer periods than the higher M. galloprovincialis zone. Despite this, when buried under sand, P. perna mortality rates were significantly higher than those of M. galloprovincialis in both laboratory and in field experiments. Under anoxic condition, P. perna mortality rates were still significantly higher than those for M. galloprovincialis, but both species died later than when exposed to sand burial, underlining the importance of the physical action of sand on mussel internal organs. When buried, both species accumulate sediments within the shell valves while still alive, but the quantities are much greater for P. perna. This suggests that P. perna gills are more severely damaged by sand abrasion and could explain its higher mortality rates. M. galloprovincialis has longer labial palps than P. perna, indicating a higher particle sorting ability and consequently explaining its lower mortality rates when exposed to sand in suspension. Habitat segregation is often explained by physiological tolerances, but in this case, such explanations fail. Although sand stress strongly affects the survival of the two species, it does not explain their vertical zonation. Contrary to our expectations, the species that is less well adapted to cope with sand stress maintains dominance in a habitat where such stress is high.
- Full Text:
- Date Issued: 2006