University students’ drinking motives : relationship with alcohol use
- Authors: Maphisa, Jabulani Maphisa
- Date: 2015
- Subjects: College students -- Alcohol use -- South Africa -- Grahamstown , College students -- South Africa -- Grahamstown -- Conduct of life , College students -- South Africa -- Grahamstown -- Attitudes , Motivation (Psychology) -- South Africa -- Grahamstown , Social integration -- South Africa -- Grahamstown , Adjustment (Psychology) -- South Africa -- Grahamstown , Conformity -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3266 , http://hdl.handle.net/10962/d1019760
- Description: Alcohol use among university students is a worldwide social and clinical reality. Understanding and addressing this phenomena is an imperative recognised by the government of South Africa and its Higher Education institutions, where student drinking has a plethora of negative consequences. This study builds on the work of Young and de Klerk (2012) with Rhodes University students by adding drinking motives to their findings of demographic correlates. The motivational model of alcohol use (Cox & Klinger, 1988) posits that drinking motives are a proximal predictor of alcohol use. The model further delineates four drinking motives (social, enhancement, coping, and conformity) which are hypothesized to lead to phenomenological distinct patterns of alcohol use. An online survey method was utilized to collect data and a representative sample of 501 students participated. Descriptive and inferential statistics were computed to address five research questions: (1) to establishing the current alcohol use trend; (2) to investigate the demographic factors associated with alcohol use; (3) to describe students‘ drinking motives; (4) to explore the correlates of drinking motives; and, finally, the primary aim was (5) to investigate whether students‘ drinking motives predicted alcohol use when controlling for the effects of descriptive drinking norms and demographic variables. The results indicate that 68.5% of participants currently consume alcohol, and 51.0 % of these drinking students consume five or more drinks during a drinking session. 20.7 % of the drinking students used alcohol at the harmful or alcohol dependent levels. Increased alcohol use was associated more with males, undergraduates, early onset drinkers, more disposable income, and students‘ perceptions of their peers‘ drinking. Students endorsed enhancement motives marginally more than social motives, followed by coping and conformity motives. Males, early onset drinkers, black students, and at risk (of alcohol use disorders) students endorsed more motives, especially social and enhancement motives. Of primary concern was the role of drinking motives on alcohol use after controlling for the effects of descriptive drinking norms. The four block hierarchical regression model which was run explained 38% of the variance in alcohol use. Drinking motives, particularly enhancement motives, displayed a statistically significant impact on alcohol use adding 11% to the variance. Additionally, age of alcohol use onset, monthly pocket money, age, and gender predicted alcohol use separately. The results of this study indicate that alcohol use has multi-factorial influences. Of note, the results confirmed the motivational model of alcohol use by indicating that alcohol use is partially motivational and that drinking behaviour is not a unitary phenomenon but instead it represents heterogeneity based on the affective change individuals anticipate to gain by drinking. The high binging rate (51%) among this sample may speak to the greater endorsement of enhancement motives, which have been shown in previous studies to be associated with heavy drinking. Enhancement motives are attempts to attain positive affect which, due to the psychoactive properties of alcohol, require greater consumption and intoxication. Additionally, as a result of the greater quantities of alcohol, individuals who drink for enhancement motives would be more prone to alcohol consequences. The results suggest that a multi-level intervention framework targeting individual students, the university community, and the surrounding community, is indicated. Furthermore, intervention may be tailored-made to address specific drinking motives.
- Full Text:
- Date Issued: 2015
- Authors: Maphisa, Jabulani Maphisa
- Date: 2015
- Subjects: College students -- Alcohol use -- South Africa -- Grahamstown , College students -- South Africa -- Grahamstown -- Conduct of life , College students -- South Africa -- Grahamstown -- Attitudes , Motivation (Psychology) -- South Africa -- Grahamstown , Social integration -- South Africa -- Grahamstown , Adjustment (Psychology) -- South Africa -- Grahamstown , Conformity -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3266 , http://hdl.handle.net/10962/d1019760
- Description: Alcohol use among university students is a worldwide social and clinical reality. Understanding and addressing this phenomena is an imperative recognised by the government of South Africa and its Higher Education institutions, where student drinking has a plethora of negative consequences. This study builds on the work of Young and de Klerk (2012) with Rhodes University students by adding drinking motives to their findings of demographic correlates. The motivational model of alcohol use (Cox & Klinger, 1988) posits that drinking motives are a proximal predictor of alcohol use. The model further delineates four drinking motives (social, enhancement, coping, and conformity) which are hypothesized to lead to phenomenological distinct patterns of alcohol use. An online survey method was utilized to collect data and a representative sample of 501 students participated. Descriptive and inferential statistics were computed to address five research questions: (1) to establishing the current alcohol use trend; (2) to investigate the demographic factors associated with alcohol use; (3) to describe students‘ drinking motives; (4) to explore the correlates of drinking motives; and, finally, the primary aim was (5) to investigate whether students‘ drinking motives predicted alcohol use when controlling for the effects of descriptive drinking norms and demographic variables. The results indicate that 68.5% of participants currently consume alcohol, and 51.0 % of these drinking students consume five or more drinks during a drinking session. 20.7 % of the drinking students used alcohol at the harmful or alcohol dependent levels. Increased alcohol use was associated more with males, undergraduates, early onset drinkers, more disposable income, and students‘ perceptions of their peers‘ drinking. Students endorsed enhancement motives marginally more than social motives, followed by coping and conformity motives. Males, early onset drinkers, black students, and at risk (of alcohol use disorders) students endorsed more motives, especially social and enhancement motives. Of primary concern was the role of drinking motives on alcohol use after controlling for the effects of descriptive drinking norms. The four block hierarchical regression model which was run explained 38% of the variance in alcohol use. Drinking motives, particularly enhancement motives, displayed a statistically significant impact on alcohol use adding 11% to the variance. Additionally, age of alcohol use onset, monthly pocket money, age, and gender predicted alcohol use separately. The results of this study indicate that alcohol use has multi-factorial influences. Of note, the results confirmed the motivational model of alcohol use by indicating that alcohol use is partially motivational and that drinking behaviour is not a unitary phenomenon but instead it represents heterogeneity based on the affective change individuals anticipate to gain by drinking. The high binging rate (51%) among this sample may speak to the greater endorsement of enhancement motives, which have been shown in previous studies to be associated with heavy drinking. Enhancement motives are attempts to attain positive affect which, due to the psychoactive properties of alcohol, require greater consumption and intoxication. Additionally, as a result of the greater quantities of alcohol, individuals who drink for enhancement motives would be more prone to alcohol consequences. The results suggest that a multi-level intervention framework targeting individual students, the university community, and the surrounding community, is indicated. Furthermore, intervention may be tailored-made to address specific drinking motives.
- Full Text:
- Date Issued: 2015
Unravelling the myths about unplanned pregnancy among female students at University of Fort Hare East London Campus, South Africa
- Authors: Chukwunyere , Amadi P
- Date: 2015
- Subjects: Unwanted pregnancy , Women college students , College students
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10353/25415 , vital:64237
- Description: This research study examined: 1. the attitudes and perceptions of female university students towards unplanned pregnancies, their (pregnancies’) associated influences and their social economic consequences on the participants and their family. 2. The level of knowledge, the sources thereof, and the girls’ attitudes and perceptions toward contraception, abortion and their actual use as possible barriers in the prevention of unplanned pregnancies. 3. The possible interventions in curbing the phenomenon of unplanned pregnancies. Data for the study was gathered through in-depth-interviews with ten female undergraduate students at the University of Fort Hare in East London campus, who had the experience of unplanned pregnancy while studying. Selection of participants was done through snowball sampling. A number of factors responsible for the unplanned pregnancy are revealed, including: Inadequate and inconsistent use of contraceptives, ignorance about contraception or rejection of contraceptive use due to religious beliefs. Influential factors regarding unplanned child bearing include: The role of the mother and the boyfriend, traditional and religious beliefs, and the desire for child bearing and motherhood. Although the majority of the girls are knowledgeable about contraception, and their right to abortion, a number of barriers hinder them from putting this knowledge into practical use. Some of the most highlighted consequences of unplanned/unwanted pregnancy are the financial burden on the family and loss of study time. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2015
- Full Text:
- Date Issued: 2015
- Authors: Chukwunyere , Amadi P
- Date: 2015
- Subjects: Unwanted pregnancy , Women college students , College students
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10353/25415 , vital:64237
- Description: This research study examined: 1. the attitudes and perceptions of female university students towards unplanned pregnancies, their (pregnancies’) associated influences and their social economic consequences on the participants and their family. 2. The level of knowledge, the sources thereof, and the girls’ attitudes and perceptions toward contraception, abortion and their actual use as possible barriers in the prevention of unplanned pregnancies. 3. The possible interventions in curbing the phenomenon of unplanned pregnancies. Data for the study was gathered through in-depth-interviews with ten female undergraduate students at the University of Fort Hare in East London campus, who had the experience of unplanned pregnancy while studying. Selection of participants was done through snowball sampling. A number of factors responsible for the unplanned pregnancy are revealed, including: Inadequate and inconsistent use of contraceptives, ignorance about contraception or rejection of contraceptive use due to religious beliefs. Influential factors regarding unplanned child bearing include: The role of the mother and the boyfriend, traditional and religious beliefs, and the desire for child bearing and motherhood. Although the majority of the girls are knowledgeable about contraception, and their right to abortion, a number of barriers hinder them from putting this knowledge into practical use. Some of the most highlighted consequences of unplanned/unwanted pregnancy are the financial burden on the family and loss of study time. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2015
- Full Text:
- Date Issued: 2015
Uphando ngokuphononongwa kwabalinganiswa ngokobume bengqondo kwiincwadi ezikhethiweyo zikaSaule u'Vuleka mhlaba no Umthetho kamthetho'
- Authors: Sokiya, Liliswa
- Date: 2015
- Subjects: Saule, N. -- Criticism and interpretation , Xhosa literature -- History and criticism
- Language: Xhosa
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/8585 , vital:26409
- Description: Impatho-mbi nabalinganiswa iba ngunobangela wokuphazamiseka kwengqodo zabalinganiswa. Umlinganiswa uthi nokuba uhleli azibone sele enezinye iingcinga, ngcinga ezo ziphazamisa ubomi bakhe. Izinto eziphazamisa umlinganiswa ebalini kukutyholwa ngezinto angazaziyo. Iyashiyana indlela abalinganiswa abachaphazeleka ngayo ngenxa yolu phazamiseko, loo nto ikhokelele ekubeni benze izinto ezingafaniyo.
- Full Text:
- Date Issued: 2015
- Authors: Sokiya, Liliswa
- Date: 2015
- Subjects: Saule, N. -- Criticism and interpretation , Xhosa literature -- History and criticism
- Language: Xhosa
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/8585 , vital:26409
- Description: Impatho-mbi nabalinganiswa iba ngunobangela wokuphazamiseka kwengqodo zabalinganiswa. Umlinganiswa uthi nokuba uhleli azibone sele enezinye iingcinga, ngcinga ezo ziphazamisa ubomi bakhe. Izinto eziphazamisa umlinganiswa ebalini kukutyholwa ngezinto angazaziyo. Iyashiyana indlela abalinganiswa abachaphazeleka ngayo ngenxa yolu phazamiseko, loo nto ikhokelele ekubeni benze izinto ezingafaniyo.
- Full Text:
- Date Issued: 2015
Using a classroom library to promote extensive reading in a Grade 8 class in a Fort Beaufort District School, Eastern Cape : an action research case study.
- Authors: Bushula, Bruce Simphiwe
- Date: 2015
- Subjects: Classroom libraries -- South africa -- Eastern Cape -- Case studies , Reading (Secondary) , Literacy -- Study and teaching (Secondary) , Literacy programs
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2022 , http://hdl.handle.net/10962/d1017333
- Description: This thesis reports on a collaborative action research case study with Grade 8 learners in a rural high school in Fort Beaufort District, Eastern Cape, South Africa. The goals of the case study were firstly, to understand best practices for promoting extensive reading using a classroom library, and secondly, to use these insights to put an extensive reading programme in place with a view to improving my practice as a language teacher and to gain better understanding of ways of enhancing my Grade 8 learners’ literacy skills. The following qualitative methods were used to collect data: observation, semi-structured interviews, class discussion, questionnaires, journal reflections and document analysis. Analysis of data involved identification of emerging themes and patterns. The findings suggest that the strategies used in the extensive reading intervention improved my learners’ levels of engagement with reading. Putting these strategies into practice, and reflecting critically on how to refine them helped enrich my own professional insight and development in relation to the implementation of extensive reading programmes. Since action research is usually designed in spirals of action, this research serves as a first spiral and a foundation upon which to build second and subsequent spirals (which do not form part of this research). The study highlighted the fact that certain challenges that emerged (for example, shortage of books at the learners’ level, and a lack of parental cooperation) need to be addressed in a second spiral of intervention. The study further suggested that the implementation of effective extensive reading programmes by teachers in the middle and upper phases of secondary schooling requires further investigation.
- Full Text:
- Date Issued: 2015
- Authors: Bushula, Bruce Simphiwe
- Date: 2015
- Subjects: Classroom libraries -- South africa -- Eastern Cape -- Case studies , Reading (Secondary) , Literacy -- Study and teaching (Secondary) , Literacy programs
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2022 , http://hdl.handle.net/10962/d1017333
- Description: This thesis reports on a collaborative action research case study with Grade 8 learners in a rural high school in Fort Beaufort District, Eastern Cape, South Africa. The goals of the case study were firstly, to understand best practices for promoting extensive reading using a classroom library, and secondly, to use these insights to put an extensive reading programme in place with a view to improving my practice as a language teacher and to gain better understanding of ways of enhancing my Grade 8 learners’ literacy skills. The following qualitative methods were used to collect data: observation, semi-structured interviews, class discussion, questionnaires, journal reflections and document analysis. Analysis of data involved identification of emerging themes and patterns. The findings suggest that the strategies used in the extensive reading intervention improved my learners’ levels of engagement with reading. Putting these strategies into practice, and reflecting critically on how to refine them helped enrich my own professional insight and development in relation to the implementation of extensive reading programmes. Since action research is usually designed in spirals of action, this research serves as a first spiral and a foundation upon which to build second and subsequent spirals (which do not form part of this research). The study highlighted the fact that certain challenges that emerged (for example, shortage of books at the learners’ level, and a lack of parental cooperation) need to be addressed in a second spiral of intervention. The study further suggested that the implementation of effective extensive reading programmes by teachers in the middle and upper phases of secondary schooling requires further investigation.
- Full Text:
- Date Issued: 2015
Using experience from previous failed implementations to improve future lean implementation strategy
- Authors: Hiles, Charmelle Amanda
- Date: 2015
- Subjects: Lean manufacturing -- Management Production planning
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11047 , vital:26880
- Description: The main objective of the study was to ascertain the presence of the identified critical success factors for lean sustainability in a chemical manufacturing company in Port Elizabeth. The critical success factors that formed part of the research included leadership involvement and commitment, management involvement and commitment, employee engagement and organisational culture. The methodology used was one of a positivistic approach. A questionnaire was utilized and the responses were analyzed using various statistical methods. Based on the results from the analysis, recommendations and conclusions could be drawn. The inferential results of the study indicated that all the critical success factors identified for this study were present within the organisation. However, there were still a large percentage of respondents that remained neutral across all the questions which could indicate reasons why previous attempts in lean implementation failed. The recommendations provided were based on the findings of the study. An implementation strategy was identified and outlined. This strategy and recommendations will assist in providing a sound platform for a sustainable lean initiative within the organisation.
- Full Text:
- Date Issued: 2015
Using experience from previous failed implementations to improve future lean implementation strategy
- Authors: Hiles, Charmelle Amanda
- Date: 2015
- Subjects: Lean manufacturing -- Management Production planning
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11047 , vital:26880
- Description: The main objective of the study was to ascertain the presence of the identified critical success factors for lean sustainability in a chemical manufacturing company in Port Elizabeth. The critical success factors that formed part of the research included leadership involvement and commitment, management involvement and commitment, employee engagement and organisational culture. The methodology used was one of a positivistic approach. A questionnaire was utilized and the responses were analyzed using various statistical methods. Based on the results from the analysis, recommendations and conclusions could be drawn. The inferential results of the study indicated that all the critical success factors identified for this study were present within the organisation. However, there were still a large percentage of respondents that remained neutral across all the questions which could indicate reasons why previous attempts in lean implementation failed. The recommendations provided were based on the findings of the study. An implementation strategy was identified and outlined. This strategy and recommendations will assist in providing a sound platform for a sustainable lean initiative within the organisation.
- Full Text:
- Date Issued: 2015
Using GIS and remote sensing to map suitable sites for wind farms: a case study of Nkonkobe Municipality, Eastern Cape.
- Authors: Gwena, Jay
- Date: 2015
- Subjects: Geographic information systems http://id.loc.gov/authorities/subjects/sh90001880 , Remote sensing http://id.loc.gov/authorities/subjects/sh85112798 , Renewable energy sources http://id.loc.gov/authorities/subjects/sh85112837
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/19420 , vital:43082
- Description: Issues relating to energy use, renewable energy introduction and climate change have received a lot of attention from governments throughout the world in the past two decades. Many developing nations like South Africa heavily rely on coal and other non-renewable resources for their production of energy. The processing of the non-renewable resources into secondary energy forms is according to many energy experts a chief contributor to climate change. Climate change is affecting agricultural production in many developing countries that entirely rely on rainfall for their production. The loss in production in South Africa is increasing the level of poverty in low-income earners and unemployed people. Also a lot of households found in rural areas of South Africa have no access to electricity. Electricity in South Africa is generated and distributed by Eskom a state owned company. In April 2008 Eskom failed to meet power demand and started introducing load shedding to maintain and upgrade their power plants. The load shedding stopped for while and was introduced again in 2014 when the power utility faced the challenge of failing to produce power to meet demand again due to problems with their power stations. The ongoing energy provision problems in South Africa can be alleviated by introducing alternative sources like renewable energy. Introduction of renewable energy in poorly developed areas like Nkonkobe Municipality can help households‘ access electricity and reduce load on the national grid. The aim of this study was to locate suitable sites for setting up wind farms in Nkonkobe municipality in South Africa. Wind energy as a resource is abundant in many areas of South Africa and areas to set wind farms for optimum harness of wind power were identified using GIS, remote sensing and multi-criteria decision making techniques. Wind speed, distance from settlements, distance from main roads, distance from national, slope and land use/land cover were chosen as the factors to consider in selecting a suitable site. Data was collected from South Africa Weather Services, University of Fort Hare and online free data sources. Thematic maps for all the factors were developed in ArcGIS and fed into Nkonkobe Municipality database developed for the study. Thematic maps were assigned weights before being overlaid using weighted overlay tool. Weights for the factors were determined using Analytical hierarchy Process‘ pairwise comparison approach. Weighted overlay of the thematic maps produced a map showing suitable areas based on the weight influence of each factor. The output map was compared to results obtained from using Boolean approach and weighted sum method as a way of checking the accuracy of obtained suitable sites. Results showed there are three sites that can be used for setting up wind farms in the study area. , Thesis (MSc) (Applied Remote Sensing and GIS) -- University of Fort Hare, 2015
- Full Text:
- Date Issued: 2015
- Authors: Gwena, Jay
- Date: 2015
- Subjects: Geographic information systems http://id.loc.gov/authorities/subjects/sh90001880 , Remote sensing http://id.loc.gov/authorities/subjects/sh85112798 , Renewable energy sources http://id.loc.gov/authorities/subjects/sh85112837
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/19420 , vital:43082
- Description: Issues relating to energy use, renewable energy introduction and climate change have received a lot of attention from governments throughout the world in the past two decades. Many developing nations like South Africa heavily rely on coal and other non-renewable resources for their production of energy. The processing of the non-renewable resources into secondary energy forms is according to many energy experts a chief contributor to climate change. Climate change is affecting agricultural production in many developing countries that entirely rely on rainfall for their production. The loss in production in South Africa is increasing the level of poverty in low-income earners and unemployed people. Also a lot of households found in rural areas of South Africa have no access to electricity. Electricity in South Africa is generated and distributed by Eskom a state owned company. In April 2008 Eskom failed to meet power demand and started introducing load shedding to maintain and upgrade their power plants. The load shedding stopped for while and was introduced again in 2014 when the power utility faced the challenge of failing to produce power to meet demand again due to problems with their power stations. The ongoing energy provision problems in South Africa can be alleviated by introducing alternative sources like renewable energy. Introduction of renewable energy in poorly developed areas like Nkonkobe Municipality can help households‘ access electricity and reduce load on the national grid. The aim of this study was to locate suitable sites for setting up wind farms in Nkonkobe municipality in South Africa. Wind energy as a resource is abundant in many areas of South Africa and areas to set wind farms for optimum harness of wind power were identified using GIS, remote sensing and multi-criteria decision making techniques. Wind speed, distance from settlements, distance from main roads, distance from national, slope and land use/land cover were chosen as the factors to consider in selecting a suitable site. Data was collected from South Africa Weather Services, University of Fort Hare and online free data sources. Thematic maps for all the factors were developed in ArcGIS and fed into Nkonkobe Municipality database developed for the study. Thematic maps were assigned weights before being overlaid using weighted overlay tool. Weights for the factors were determined using Analytical hierarchy Process‘ pairwise comparison approach. Weighted overlay of the thematic maps produced a map showing suitable areas based on the weight influence of each factor. The output map was compared to results obtained from using Boolean approach and weighted sum method as a way of checking the accuracy of obtained suitable sites. Results showed there are three sites that can be used for setting up wind farms in the study area. , Thesis (MSc) (Applied Remote Sensing and GIS) -- University of Fort Hare, 2015
- Full Text:
- Date Issued: 2015
Using risk mitigation approaches to define the requirements for software escrow
- Authors: Rode, Karl
- Date: 2015
- Subjects: Escrows , Source code (Computer Science)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4714 , http://hdl.handle.net/10962/d1017936
- Description: Two or more parties entering into a contract for service or goods may make use of an escrow of the funds for payment to enable trust in the contract. In such an event the documents or financial instruments, the object(s) in escrow, are held in trust by a trusted third party (escrow provider) until the specified conditions are fulfilled. In the scenario of software escrow, the object of escrow is typically the source code, and the specified release conditions usually address potential scenarios wherein the software provider becomes unable to continue providing services (such as due to bankruptcy or a change in services provided, etc.) The subject of software escrow is not well documented in the academic body of work, with the largest information sources, active commentary and supporting papers provided by commercial software escrow providers, both in South Africa and abroad. This work maps the software escrow topic onto the King III compliance framework in South Africa. This is of value since any users of bespoke developed applications may require extended professional assistance to align with the King III guidelines. The supporting risk assessment model developed in this work will serve as a tool to evaluate and motivate for software escrow agreements. It will also provide an overview of the various escrow agreement types and will transfer the focus to the value proposition that they each hold. Initial research has indicated that current awareness of software escrow in industry is still very low. This was evidenced by the significant number of approached specialists that declined to participate in the survey due to their own admitted inexperience in applying the discipline of software escrow within their companies. Moreover, the participants that contributed to the research indicated that they only required software escrow for medium to highly critical applications. This proved the value of assessing the various risk factors that bespoke software development introduces, as well as the risk mitigation options available, through tools such as escrow, to reduce the actual and residual risk to a manageable level.
- Full Text:
- Date Issued: 2015
- Authors: Rode, Karl
- Date: 2015
- Subjects: Escrows , Source code (Computer Science)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4714 , http://hdl.handle.net/10962/d1017936
- Description: Two or more parties entering into a contract for service or goods may make use of an escrow of the funds for payment to enable trust in the contract. In such an event the documents or financial instruments, the object(s) in escrow, are held in trust by a trusted third party (escrow provider) until the specified conditions are fulfilled. In the scenario of software escrow, the object of escrow is typically the source code, and the specified release conditions usually address potential scenarios wherein the software provider becomes unable to continue providing services (such as due to bankruptcy or a change in services provided, etc.) The subject of software escrow is not well documented in the academic body of work, with the largest information sources, active commentary and supporting papers provided by commercial software escrow providers, both in South Africa and abroad. This work maps the software escrow topic onto the King III compliance framework in South Africa. This is of value since any users of bespoke developed applications may require extended professional assistance to align with the King III guidelines. The supporting risk assessment model developed in this work will serve as a tool to evaluate and motivate for software escrow agreements. It will also provide an overview of the various escrow agreement types and will transfer the focus to the value proposition that they each hold. Initial research has indicated that current awareness of software escrow in industry is still very low. This was evidenced by the significant number of approached specialists that declined to participate in the survey due to their own admitted inexperience in applying the discipline of software escrow within their companies. Moreover, the participants that contributed to the research indicated that they only required software escrow for medium to highly critical applications. This proved the value of assessing the various risk factors that bespoke software development introduces, as well as the risk mitigation options available, through tools such as escrow, to reduce the actual and residual risk to a manageable level.
- Full Text:
- Date Issued: 2015
Using the larval parasitoid, Agathis bishopi (Nixon) (Hymenoptera: Braconidae), for early detection of false codling moth, Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) infested fruit
- Authors: Zimba, Kennedy Josaya
- Date: 2015
- Subjects: Cryptophlebia leucotreta , Citrus -- Diseases and pests -- South Africa , Pests -- Biological control -- South Africa , Cryptophlebia leucotreta -- Detection , Parasitoids -- Hosts , Braconidae
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5919 , http://hdl.handle.net/10962/d1017186
- Description: Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) is one of the major citrus pests of economic importance for South Africa’s citrus industry. It is endemic to Africa, and therefore a phytosanitary pest with zero tolerance by most export markets. The cryptic nature of T. leucotreta makes visual inspection an inefficient method for detecting neonate larvae in fruit in the packhouse. Therefore, a more accurate method for sorting infested fruit at the packhouse, particularly for newly infested fruit could ensure market access. A recent study showed that fruit infested by T. leucotreta emit a chemical profile different from that of a healthy fruit. Several studies provide evidence that parasitoids locate their hosts feeding on fruit by exploiting the novel chemical profiles produced due to host herbivory. The aim of this study was to evaluate the potential of using the naturally occurring behaviour of a larval parasitoid Agathis bishopi (Nixon) (Hymenoptera: Braconidae) for detection of T. leucotreta infested fruit, by determining which compound in infested fruit is attractive to parasitoids. Ytube olfactometer and flight-tunnel bioassays with healthy and T. leucotreta infested fruit showed a significantly stronger response of A. bishopi female parasitoids to infested fruit. Among the volatile compounds associated with T. leucotreta infested fruit, D-limonene elicited the strongest attraction to A. bishopi female parasitoids. Attraction of mated A. bishopi female parasitoids to T. leucotreta infested fruit and D-limonene significantly increased after oviposition experience. Behavioural responses of A. bishopi female parasitoids that were associated with T. leucotreta infested fruit were investigated to determine which behaviours are distinct and interpretable. Probing and oviposition behaviours were the most noticeable and were only elicited on infested fruit when parasitoids contacted T. leucotreta frass, indicating that chemical compounds in frass are short-range cues used for final host location. Since production of D-limonene by fruit is elevated due to herbivory by different pests including mechanical injury on fruit, response of A. bishopi female parasitoids to compounds in frass offers a more specific and potentially useful mechanism for development of a detection system for T. leucotreta infested fruit. Chemical analysis of T. leucotreta frass and conditioning A. bishopi parasitoids to respond behaviourally to compounds in frass is proposed.
- Full Text:
- Date Issued: 2015
- Authors: Zimba, Kennedy Josaya
- Date: 2015
- Subjects: Cryptophlebia leucotreta , Citrus -- Diseases and pests -- South Africa , Pests -- Biological control -- South Africa , Cryptophlebia leucotreta -- Detection , Parasitoids -- Hosts , Braconidae
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5919 , http://hdl.handle.net/10962/d1017186
- Description: Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) is one of the major citrus pests of economic importance for South Africa’s citrus industry. It is endemic to Africa, and therefore a phytosanitary pest with zero tolerance by most export markets. The cryptic nature of T. leucotreta makes visual inspection an inefficient method for detecting neonate larvae in fruit in the packhouse. Therefore, a more accurate method for sorting infested fruit at the packhouse, particularly for newly infested fruit could ensure market access. A recent study showed that fruit infested by T. leucotreta emit a chemical profile different from that of a healthy fruit. Several studies provide evidence that parasitoids locate their hosts feeding on fruit by exploiting the novel chemical profiles produced due to host herbivory. The aim of this study was to evaluate the potential of using the naturally occurring behaviour of a larval parasitoid Agathis bishopi (Nixon) (Hymenoptera: Braconidae) for detection of T. leucotreta infested fruit, by determining which compound in infested fruit is attractive to parasitoids. Ytube olfactometer and flight-tunnel bioassays with healthy and T. leucotreta infested fruit showed a significantly stronger response of A. bishopi female parasitoids to infested fruit. Among the volatile compounds associated with T. leucotreta infested fruit, D-limonene elicited the strongest attraction to A. bishopi female parasitoids. Attraction of mated A. bishopi female parasitoids to T. leucotreta infested fruit and D-limonene significantly increased after oviposition experience. Behavioural responses of A. bishopi female parasitoids that were associated with T. leucotreta infested fruit were investigated to determine which behaviours are distinct and interpretable. Probing and oviposition behaviours were the most noticeable and were only elicited on infested fruit when parasitoids contacted T. leucotreta frass, indicating that chemical compounds in frass are short-range cues used for final host location. Since production of D-limonene by fruit is elevated due to herbivory by different pests including mechanical injury on fruit, response of A. bishopi female parasitoids to compounds in frass offers a more specific and potentially useful mechanism for development of a detection system for T. leucotreta infested fruit. Chemical analysis of T. leucotreta frass and conditioning A. bishopi parasitoids to respond behaviourally to compounds in frass is proposed.
- Full Text:
- Date Issued: 2015
Using vehicle activated signs as an integrated measure to improve road safety in South Africa
- Authors: Swanepoel, Charl
- Date: 2015
- Subjects: Traffic signs and signals -- South Africa , Electronic traffic controls
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/3745 , vital:20460
- Description: Road safety is an aspect of major concern on road networks, not only on a local scale in South Africa, but also on a global scale. South Africa is experiencing an unacceptably high rate of fatal road traffic crashes and as a result has one of the highest per capita rate of road fatalities in the world. The Global Plan for the Decade of Action for Road Safety 2011 – 2020 was published in 2011 by the World Health Organisation (WHO) to guide and assist countries with the improvement of road safety. The management of vehicle speeds is one of numerous important interventions identified in the Global Plan. The technical and economic feasibility of using a specific Road safety is an aspect of major concern on road networks, not only on a local scale in South Africa, but also on a global scale. South Africa is experiencing an unacceptably high rate of fatal road traffic crashes and as a result has one of the highest per capita rate of road fatalities in the world. The Global Plan for the Decade of Action for Road Safety 2011 – 2020 was published in 2011 by the World Health Organisation (WHO) to guide and assist countries with the improvement of road safety. The management of vehicle speeds is one of numerous important interventions identified in the Global Plan. The technical and economic feasibility of using a specific technology, namely Vehicle Activated Signs (VAS), to contribute to the overall improvement of road safety on a national level in South Africa were investigated, with particular emphasis on the improvement of road safety through the reduction of fatal road traffic crashes. VAS are part of a range of measures that can be used to curb vehicle speeds, similar to conventional measures like speed cameras and traffic calming devices. VAS technology has seen limited use in South extrapolation of results from SCC’s VAS effectiveness study, and the application of these results to the South African road safety and road user statistics for the one year period March 2011 to March 2012. Key factors relating to speed and general driver obedience were also taken into consideration. It was established that the use of VAS would lead to a moderate reduction in the number of fatal road traffic crashes that occur annually, which in turn holds financial and socio-economic benefits for South Africa. A comparison of selected products available from two South African based electronic road sign manufacturing companies with conventional VAS was also carried out, focussing on product function, use and cost. It has been concluded that it would be technically and economically feasible to introduce VAS on the South African road network to improve the prevailing road safety situation.
- Full Text:
- Date Issued: 2015
- Authors: Swanepoel, Charl
- Date: 2015
- Subjects: Traffic signs and signals -- South Africa , Electronic traffic controls
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/3745 , vital:20460
- Description: Road safety is an aspect of major concern on road networks, not only on a local scale in South Africa, but also on a global scale. South Africa is experiencing an unacceptably high rate of fatal road traffic crashes and as a result has one of the highest per capita rate of road fatalities in the world. The Global Plan for the Decade of Action for Road Safety 2011 – 2020 was published in 2011 by the World Health Organisation (WHO) to guide and assist countries with the improvement of road safety. The management of vehicle speeds is one of numerous important interventions identified in the Global Plan. The technical and economic feasibility of using a specific Road safety is an aspect of major concern on road networks, not only on a local scale in South Africa, but also on a global scale. South Africa is experiencing an unacceptably high rate of fatal road traffic crashes and as a result has one of the highest per capita rate of road fatalities in the world. The Global Plan for the Decade of Action for Road Safety 2011 – 2020 was published in 2011 by the World Health Organisation (WHO) to guide and assist countries with the improvement of road safety. The management of vehicle speeds is one of numerous important interventions identified in the Global Plan. The technical and economic feasibility of using a specific technology, namely Vehicle Activated Signs (VAS), to contribute to the overall improvement of road safety on a national level in South Africa were investigated, with particular emphasis on the improvement of road safety through the reduction of fatal road traffic crashes. VAS are part of a range of measures that can be used to curb vehicle speeds, similar to conventional measures like speed cameras and traffic calming devices. VAS technology has seen limited use in South extrapolation of results from SCC’s VAS effectiveness study, and the application of these results to the South African road safety and road user statistics for the one year period March 2011 to March 2012. Key factors relating to speed and general driver obedience were also taken into consideration. It was established that the use of VAS would lead to a moderate reduction in the number of fatal road traffic crashes that occur annually, which in turn holds financial and socio-economic benefits for South Africa. A comparison of selected products available from two South African based electronic road sign manufacturing companies with conventional VAS was also carried out, focussing on product function, use and cost. It has been concluded that it would be technically and economically feasible to introduce VAS on the South African road network to improve the prevailing road safety situation.
- Full Text:
- Date Issued: 2015
Validity and accuracy of self-reported drug allergies
- Authors: Grant, Elzaan
- Date: 2015
- Subjects: Drug allergy , Medical history taking
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: http://hdl.handle.net/10948/3295 , vital:20421
- Description: Purpose: Pharmacists must ensure the safe and effective use of medication, but often have only the documented patient history to guide assessment of therapy. There is a lack of information on the incidence of claimed drug allergies or the validity of these self-reported drug allergies in the South African population. Mislabelling of patients as being allergic to medication often deprives them of important therapeutic drugs and alternative agents may be more dangerous, less effective and more costly (Hung et al., 1994). The aim of the research was therefore to determine the incidence of drug allergies in patients admitted to a private hospital and to assess the validity of these self-reported drug allergies. Methods: A descriptive, non-experimental study design was used. Data was collected using a concurrent, cross-sectional approach and collected from patients admitted to hospital using Medical Chart Reviews and researcher-led, questionnaire based interviews. During the seven month sampling period, 693 patients were identified with one or more self-reported drug allergies. A subset of 99 patients (14.2%) consented to a researcher-led interview. The allergies were assigned to one of three groups based on the history: (i) High probability: signs and symptoms typical of an immunological reaction. (ii) Low probability: signs and symptoms of the reaction were predictable reactions or side effects of the drug. (iii) Unknown status: no information concerning the reaction history was available. Results: A total of 953 allergies were identified in the 693 patients, with a ratio of drug allergy to patient of 1.4:1. The majority of claimed allergies were to penicillin (39.2%), opioid analgesics (17.6%), other antimicrobials, including co-trimoxazole (13.5%), NSAIDs (9.9%) and unspecified “sulphur” allergy (8.7%). Descriptions of the “allergic” reactions were only recorded on 8.9% (62, n=693) of the reviewed charts. Only 56.5% (35, n=62) of the symptoms recorded as “allergy” were indicative of the event being allergic or immunological in nature. In total, 1.3% (9, n=693) of the patients with a self-reported allergy received the allergen while in hospital. In three cases this was the result of a pharmacist overlooking the recorded allergy, and dispensing the allergen to the patient. A total of 118 allergies were identified in the 99 interviewed patients, with a ratio of drug allergy to patient of 1.2:1. Inaccurate allergy history was found in 9.1% (9, n=99) of the interviewed patients. Overall, the majority of self-reported drug allergies (67.8%) had a “high probability” of being a true drug allergy. Allergies that were assigned into the high probability group were: penicillin (74.1%), co-trimoxazole (91.7%), NSAID‟s (55.6%) and 75.0% of opioids. Conclusion: In summary, the validity of self-reported drug allergies need to be determined before excluding medication from a patient‟s treatment options. Detailed descriptions can assist in the evaluation of self-reported allergies which would be advantageous to both prescribers and patients. Pharmacists need to play a bigger role in ensuring accurate documentation of drug allergy history, with detailed descriptions, in order to ensure safe and effective drug use within the hospital environment.
- Full Text:
- Date Issued: 2015
- Authors: Grant, Elzaan
- Date: 2015
- Subjects: Drug allergy , Medical history taking
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: http://hdl.handle.net/10948/3295 , vital:20421
- Description: Purpose: Pharmacists must ensure the safe and effective use of medication, but often have only the documented patient history to guide assessment of therapy. There is a lack of information on the incidence of claimed drug allergies or the validity of these self-reported drug allergies in the South African population. Mislabelling of patients as being allergic to medication often deprives them of important therapeutic drugs and alternative agents may be more dangerous, less effective and more costly (Hung et al., 1994). The aim of the research was therefore to determine the incidence of drug allergies in patients admitted to a private hospital and to assess the validity of these self-reported drug allergies. Methods: A descriptive, non-experimental study design was used. Data was collected using a concurrent, cross-sectional approach and collected from patients admitted to hospital using Medical Chart Reviews and researcher-led, questionnaire based interviews. During the seven month sampling period, 693 patients were identified with one or more self-reported drug allergies. A subset of 99 patients (14.2%) consented to a researcher-led interview. The allergies were assigned to one of three groups based on the history: (i) High probability: signs and symptoms typical of an immunological reaction. (ii) Low probability: signs and symptoms of the reaction were predictable reactions or side effects of the drug. (iii) Unknown status: no information concerning the reaction history was available. Results: A total of 953 allergies were identified in the 693 patients, with a ratio of drug allergy to patient of 1.4:1. The majority of claimed allergies were to penicillin (39.2%), opioid analgesics (17.6%), other antimicrobials, including co-trimoxazole (13.5%), NSAIDs (9.9%) and unspecified “sulphur” allergy (8.7%). Descriptions of the “allergic” reactions were only recorded on 8.9% (62, n=693) of the reviewed charts. Only 56.5% (35, n=62) of the symptoms recorded as “allergy” were indicative of the event being allergic or immunological in nature. In total, 1.3% (9, n=693) of the patients with a self-reported allergy received the allergen while in hospital. In three cases this was the result of a pharmacist overlooking the recorded allergy, and dispensing the allergen to the patient. A total of 118 allergies were identified in the 99 interviewed patients, with a ratio of drug allergy to patient of 1.2:1. Inaccurate allergy history was found in 9.1% (9, n=99) of the interviewed patients. Overall, the majority of self-reported drug allergies (67.8%) had a “high probability” of being a true drug allergy. Allergies that were assigned into the high probability group were: penicillin (74.1%), co-trimoxazole (91.7%), NSAID‟s (55.6%) and 75.0% of opioids. Conclusion: In summary, the validity of self-reported drug allergies need to be determined before excluding medication from a patient‟s treatment options. Detailed descriptions can assist in the evaluation of self-reported allergies which would be advantageous to both prescribers and patients. Pharmacists need to play a bigger role in ensuring accurate documentation of drug allergy history, with detailed descriptions, in order to ensure safe and effective drug use within the hospital environment.
- Full Text:
- Date Issued: 2015
Variation in breeding systems, floral morphology and nectar properties in three co-occurring Erica species with contrasting pollination syndromes
- Authors: Lombardi, Giorgio Colombo
- Date: 2015
- Subjects: Ericas -- South Africa -- Western Cape , Ericas -- Morphology , Ericas -- Reproduction , Ericas -- Pollination , Pollination by animals , Pollination by insects , Nectar
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4273 , http://hdl.handle.net/10962/d1018567
- Description: The genus Erica is the most species rich in the Cape Floristic Kingdom, yet there are limited data on the various flower-pollinator interactions and breeding systems for the majority of these species. Until recently research has focussed on predictive floral traits, including flower shape, length of corolla and corolla opening to identify likely pollinators in this genus. Field observations provide an empirical test of such predictions. This study investigated three species of Erica and compared their pollination and breeding systems and floral biology. Research, including field experiments and pollinator observations was undertaken in the Vogelgat Private Nature Reserve, Maanschynkop Nature Reserve and Boskloof farm in the vicinity of Hermanus in the Western Cape Province of South Africa. Field observations were conducted to determine what flower- visitor interactions occurred, while nectar volumes and sugar concentrations were measured to determine the value of the reward to the different visitors. Selective exclusion and breeding system experiments were carried out to determine whether these Erica species were capable of autonomous self-fertilization or whether they are pollinator dependent for breeding success. The unusual morphology of Erica lanuginosa suggested rodent-pollination. Field observations, including photographs of visits to plants in the field, the presence of pollen in scat sample and selective exclusion and breeding system experiments identified rodents, primarily Acomys subspinosus to be the primary pollinator. Long-proboscid flies of the family Nemestrinidae were found, on the basis of field observations to be responsible for pollination of the endemic Erica aristata. This was supported by with nectar volume and sugar concentration samples which are consistent with other long-proboscid fly-pollinated plant species. Selective exclusion and breeding system experiments undertaken confirmed that Erica aristata required a pollinator to set seed. Observations and breeding trials revealed bird-pollination in Erica sessiliflora. Nectar volume and sugar concentrations in Erica sessiliflora were in line with other sunbird-pollinated plant species, providing the necessary rewards for sunbirds visiting this species. Specialised pollination by single pollinators was found in all three species and results from breeding system experiments show that out-crossing is important. Further research into pollinator-flower interactions in the genus Erica is necessary, not least to understand more fully the conservation importance of specific pollinators.
- Full Text:
- Date Issued: 2015
- Authors: Lombardi, Giorgio Colombo
- Date: 2015
- Subjects: Ericas -- South Africa -- Western Cape , Ericas -- Morphology , Ericas -- Reproduction , Ericas -- Pollination , Pollination by animals , Pollination by insects , Nectar
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4273 , http://hdl.handle.net/10962/d1018567
- Description: The genus Erica is the most species rich in the Cape Floristic Kingdom, yet there are limited data on the various flower-pollinator interactions and breeding systems for the majority of these species. Until recently research has focussed on predictive floral traits, including flower shape, length of corolla and corolla opening to identify likely pollinators in this genus. Field observations provide an empirical test of such predictions. This study investigated three species of Erica and compared their pollination and breeding systems and floral biology. Research, including field experiments and pollinator observations was undertaken in the Vogelgat Private Nature Reserve, Maanschynkop Nature Reserve and Boskloof farm in the vicinity of Hermanus in the Western Cape Province of South Africa. Field observations were conducted to determine what flower- visitor interactions occurred, while nectar volumes and sugar concentrations were measured to determine the value of the reward to the different visitors. Selective exclusion and breeding system experiments were carried out to determine whether these Erica species were capable of autonomous self-fertilization or whether they are pollinator dependent for breeding success. The unusual morphology of Erica lanuginosa suggested rodent-pollination. Field observations, including photographs of visits to plants in the field, the presence of pollen in scat sample and selective exclusion and breeding system experiments identified rodents, primarily Acomys subspinosus to be the primary pollinator. Long-proboscid flies of the family Nemestrinidae were found, on the basis of field observations to be responsible for pollination of the endemic Erica aristata. This was supported by with nectar volume and sugar concentration samples which are consistent with other long-proboscid fly-pollinated plant species. Selective exclusion and breeding system experiments undertaken confirmed that Erica aristata required a pollinator to set seed. Observations and breeding trials revealed bird-pollination in Erica sessiliflora. Nectar volume and sugar concentrations in Erica sessiliflora were in line with other sunbird-pollinated plant species, providing the necessary rewards for sunbirds visiting this species. Specialised pollination by single pollinators was found in all three species and results from breeding system experiments show that out-crossing is important. Further research into pollinator-flower interactions in the genus Erica is necessary, not least to understand more fully the conservation importance of specific pollinators.
- Full Text:
- Date Issued: 2015
Variation in selected solid wood properties of young pinus patula from diverse sites in the Mpumalanga escarpment area in South Africa
- Authors: Muller, Barry Glen
- Date: 2015
- Subjects: Pinus patula -- South Africa -- Mpumalanga , Wood -- South Africa -- Mpumalanga
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/5509 , vital:20872
- Description: The objectives of this study were to study wood property variation in Pinus patula from different physiographic sites, the interrelationship between wood properties and the effects of some forest site factors on wood properties and their within-tree variation. The wood properties considered were density, transverse shrinkage, grain angle and stiffness (modulus of elasticity). Ten trees were taken from each of seventeen sites selected during a previous study of soil ecology and tree growth patterns on the escarpment of Mpumalanga in South Africa. This is a complex physiographic region with several different growth sites within a relatively small geographical area. The key finding of the study was that the effect of radial distance from the pith (i.e. the age of the tree) was highly significant and accounted for most of the variation of the trees sampled. Although the effect of site on the selected wood properties was highly significant, its effect accounted for a relatively small percentage of the total variation in each case. Consequently, solid wood processors must take into account the large variation within a tree when implementing strategies to minimise the downgrade of timber as result of excessive board distortion and/or inferior strength. There were significant correlations between wood density and density slope, radial shrinkage, shrinkage ratio and stiffness and also significant correlations between wood stiffness and density slope and radial shrinkage. Density and grain angle both showed significant correlations with the most important climatic factors. ‘Growth days’ (which is an index reflecting the number of days per year when soil moisture is not a limiting factor for plant growth) was identified as one of the principal growth factors influencing the selected wood properties, because of it’s strong relationships with wood density, density slope, grain angle and stiffness. Regression models were developed to predict wood density and grain angle from growth variables. The results show that those wood properties that correlate with geographic representable site variables can be included in site classification and evaluation systems, to assist in predicting growth in terms of volume yield and wood quality.
- Full Text:
- Date Issued: 2015
- Authors: Muller, Barry Glen
- Date: 2015
- Subjects: Pinus patula -- South Africa -- Mpumalanga , Wood -- South Africa -- Mpumalanga
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/5509 , vital:20872
- Description: The objectives of this study were to study wood property variation in Pinus patula from different physiographic sites, the interrelationship between wood properties and the effects of some forest site factors on wood properties and their within-tree variation. The wood properties considered were density, transverse shrinkage, grain angle and stiffness (modulus of elasticity). Ten trees were taken from each of seventeen sites selected during a previous study of soil ecology and tree growth patterns on the escarpment of Mpumalanga in South Africa. This is a complex physiographic region with several different growth sites within a relatively small geographical area. The key finding of the study was that the effect of radial distance from the pith (i.e. the age of the tree) was highly significant and accounted for most of the variation of the trees sampled. Although the effect of site on the selected wood properties was highly significant, its effect accounted for a relatively small percentage of the total variation in each case. Consequently, solid wood processors must take into account the large variation within a tree when implementing strategies to minimise the downgrade of timber as result of excessive board distortion and/or inferior strength. There were significant correlations between wood density and density slope, radial shrinkage, shrinkage ratio and stiffness and also significant correlations between wood stiffness and density slope and radial shrinkage. Density and grain angle both showed significant correlations with the most important climatic factors. ‘Growth days’ (which is an index reflecting the number of days per year when soil moisture is not a limiting factor for plant growth) was identified as one of the principal growth factors influencing the selected wood properties, because of it’s strong relationships with wood density, density slope, grain angle and stiffness. Regression models were developed to predict wood density and grain angle from growth variables. The results show that those wood properties that correlate with geographic representable site variables can be included in site classification and evaluation systems, to assist in predicting growth in terms of volume yield and wood quality.
- Full Text:
- Date Issued: 2015
Variation in urease and β-glucosidase activities with soil depth and root density in a ‘Cripp's Pink’/M7 apple orchard under conventional and organic management.
- Meyer, André H, Wooldridge, John, Dames, Joanna F
- Authors: Meyer, André H , Wooldridge, John , Dames, Joanna F
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444051 , vital:74181 , https://doi.org/10.1080/02571862.2015.1053155
- Description: The effects of conventional (CON; utilising synthetic fertiliser and herbicide) and organic (ORG; nutrients supplied in compost, weeds controlled with straw mulch) orchard floor management practices on depth-wise variation in urease and β-glucosidase activities in tree-row soils were compared in a Western Cape ‘Cripp's Pink’/M7 apple orchard. Urease and β-glucosidase activities were determined spectrophotometrically in soils from five depth intervals from the walls of trenches excavated across the tree rows after seven years of treatment application. Soil pH, organic carbon, nitrate (NO3 ) and ammonium (NH4 ) nitrogen were also determined, as was root density. Enzyme activities were higher in the ORG than the CON topsoils but did not differ significantly (p = 0.05) at depths >30 cm. The positive effects of the ORG treatments were attributed to the liming effect and carbon and nitrogen contributions of the compost. Urease and β-glucosidase activities correlated strongly. Activities of both enzymes correlated significantly and positively with carbon, NO3− and pH, with urease correlated more strongly than β-glucosidase. Only urease correlated with root density. Organic orchard floor management practices may be more effective than CON practices in promoting microbial enzyme activities in the 0–30 cm soil depth intervals of Western Cape apple orchard soils.
- Full Text:
- Date Issued: 2015
- Authors: Meyer, André H , Wooldridge, John , Dames, Joanna F
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444051 , vital:74181 , https://doi.org/10.1080/02571862.2015.1053155
- Description: The effects of conventional (CON; utilising synthetic fertiliser and herbicide) and organic (ORG; nutrients supplied in compost, weeds controlled with straw mulch) orchard floor management practices on depth-wise variation in urease and β-glucosidase activities in tree-row soils were compared in a Western Cape ‘Cripp's Pink’/M7 apple orchard. Urease and β-glucosidase activities were determined spectrophotometrically in soils from five depth intervals from the walls of trenches excavated across the tree rows after seven years of treatment application. Soil pH, organic carbon, nitrate (NO3 ) and ammonium (NH4 ) nitrogen were also determined, as was root density. Enzyme activities were higher in the ORG than the CON topsoils but did not differ significantly (p = 0.05) at depths >30 cm. The positive effects of the ORG treatments were attributed to the liming effect and carbon and nitrogen contributions of the compost. Urease and β-glucosidase activities correlated strongly. Activities of both enzymes correlated significantly and positively with carbon, NO3− and pH, with urease correlated more strongly than β-glucosidase. Only urease correlated with root density. Organic orchard floor management practices may be more effective than CON practices in promoting microbial enzyme activities in the 0–30 cm soil depth intervals of Western Cape apple orchard soils.
- Full Text:
- Date Issued: 2015
VC Sizwe Mabizela addressing the students 21 Oct 2015
- Authors: Thomas, Cornelius
- Date: 2015
- Type: Image
- Identifier: vital:8061 , http://hdl.handle.net/10962/d1020560
- Description: On Wednesday, 21 October 2015, Rhodes University closed in solidarity with the higher education sector as students and staff embarked on nationwide protest action against the shortage of funding in the South African higher education sector. #FeesMustFall is a national student led protest movement that began in mid-October 2015 in response to proposed increases in fees at South African universities. These images depict the peaceful march and illustrate the extent of solidarity among staff, students and community members who joined in support of the protest.
- Full Text: false
- Date Issued: 2015
- Authors: Thomas, Cornelius
- Date: 2015
- Type: Image
- Identifier: vital:8061 , http://hdl.handle.net/10962/d1020560
- Description: On Wednesday, 21 October 2015, Rhodes University closed in solidarity with the higher education sector as students and staff embarked on nationwide protest action against the shortage of funding in the South African higher education sector. #FeesMustFall is a national student led protest movement that began in mid-October 2015 in response to proposed increases in fees at South African universities. These images depict the peaceful march and illustrate the extent of solidarity among staff, students and community members who joined in support of the protest.
- Full Text: false
- Date Issued: 2015
Venerating death
- Authors: Jones, Ward E
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/275749 , vital:55076 , xlink:href="https://doi.org/10.1080/05568641.2015.1014540"
- Description: In this paper, I am concerned with elucidating and expanding our attitudes toward our own death. As it is, our common attitudes toward our death are the following: we fear our premature death, and we dread our inevitable death. These attitudes are rational, but I want to argue that our attitudes toward death should be more complicated than this. A condition upon our value, our preciousness, as creatures is that we are vulnerable, and our vulnerability is, at bottom, a vulnerability to death. A corollary of this is that we could not be loved, either by ourselves or by others, for one cannot love—be concerned for—a being invulnerable to death. As a consequence, death plays a deep and abiding role in our value systems. Our susceptibility to premature and inevitable death is a condition upon our being valuable creatures and, in turn, it is a condition upon our being loved. Given the high value that we place on being valuable creatures who deserve love, we should equally place a high value on the constitutive conditions for being precious and loved. If, as I suggest, one of these conditions is that we will die, we should see our deaths not simply as something to fear or dread, but as something of great importance in our lives. Our deaths should be treated with awe, respect, and even praise.
- Full Text:
- Date Issued: 2015
- Authors: Jones, Ward E
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/275749 , vital:55076 , xlink:href="https://doi.org/10.1080/05568641.2015.1014540"
- Description: In this paper, I am concerned with elucidating and expanding our attitudes toward our own death. As it is, our common attitudes toward our death are the following: we fear our premature death, and we dread our inevitable death. These attitudes are rational, but I want to argue that our attitudes toward death should be more complicated than this. A condition upon our value, our preciousness, as creatures is that we are vulnerable, and our vulnerability is, at bottom, a vulnerability to death. A corollary of this is that we could not be loved, either by ourselves or by others, for one cannot love—be concerned for—a being invulnerable to death. As a consequence, death plays a deep and abiding role in our value systems. Our susceptibility to premature and inevitable death is a condition upon our being valuable creatures and, in turn, it is a condition upon our being loved. Given the high value that we place on being valuable creatures who deserve love, we should equally place a high value on the constitutive conditions for being precious and loved. If, as I suggest, one of these conditions is that we will die, we should see our deaths not simply as something to fear or dread, but as something of great importance in our lives. Our deaths should be treated with awe, respect, and even praise.
- Full Text:
- Date Issued: 2015
Views of HIV and AIDS amongst rural secondary school youth: an exploratory study
- Daniels, Brendon Mara Laurence
- Authors: Daniels, Brendon Mara Laurence
- Date: 2015
- Subjects: Sexually transmitted diseases -- Study and teaching Communicable diseases -- Prevention High school students
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/11460 , vital:26928
- Description: The HIV and AIDS epidemic continues to affect communities worldwide particularly so in South Africa. Youth, also the so-called Coloured youth, continue to remain at risk of infection, in spite of having been exposed to information about HIV and AIDS. This study explores the views of Coloured secondary school youth in a rural town in the Eastern Cape, on HIV and AIDS. Fifteen secondary school learners, both boys and girls, from Grades 10 to 12 were purposively selected. This qualitative study, framed within an interpretivist paradigm, draws on a phenomenological methodology. The data was generated from using drawing and focus group interviews and analysed using thematic analysis. The research adhered to ethical principles and trustworthiness was ensured. Constructivism and Bronfenbrenner’s bio-ecological systems theory were used to frame the study and to make meaning of the findings. In response to the primary research question, What views do Coloured youth attending a secondary school in a rural town have of HIV and AIDS?, five themes emerged, namely: individuals spread HIV, impoverished family life increases youth vulnerability to HIV, youth under pressure from peers knowingly engage in risky behaviour, misconceptions fuel the epidemic, and HIV and AIDS “captures the community in its net”. Drawing on the findings and in response to the secondary research question, What guidelines can be developed to assist educators to facilitate learners taking action against the spread of HIV and AIDS?, several guidelines were developed. They suggest that teachers should use participatory pedagogies to engage secondary school learners when teaching HIV and AIDS, build self-esteem in their learners, assist learners in dealing with peer pressure, engage learners in erasing misconceptions, and enable learners to break free from being “caught in the net” of HIV and AIDS. Collectively these guidelines could enable learners to take action in protecting themselves and their community against the spread of the HI virus. The study concludes that the views that Coloured secondary school learners from a rural town have about HIV and AIDS show their awareness of the realities of the epidemic affecting the individual, the family, the school and their community. They have constructed their views of HIV and AIDS in a way which shows their understanding of the complexities of the epidemic.
- Full Text:
- Date Issued: 2015
- Authors: Daniels, Brendon Mara Laurence
- Date: 2015
- Subjects: Sexually transmitted diseases -- Study and teaching Communicable diseases -- Prevention High school students
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/11460 , vital:26928
- Description: The HIV and AIDS epidemic continues to affect communities worldwide particularly so in South Africa. Youth, also the so-called Coloured youth, continue to remain at risk of infection, in spite of having been exposed to information about HIV and AIDS. This study explores the views of Coloured secondary school youth in a rural town in the Eastern Cape, on HIV and AIDS. Fifteen secondary school learners, both boys and girls, from Grades 10 to 12 were purposively selected. This qualitative study, framed within an interpretivist paradigm, draws on a phenomenological methodology. The data was generated from using drawing and focus group interviews and analysed using thematic analysis. The research adhered to ethical principles and trustworthiness was ensured. Constructivism and Bronfenbrenner’s bio-ecological systems theory were used to frame the study and to make meaning of the findings. In response to the primary research question, What views do Coloured youth attending a secondary school in a rural town have of HIV and AIDS?, five themes emerged, namely: individuals spread HIV, impoverished family life increases youth vulnerability to HIV, youth under pressure from peers knowingly engage in risky behaviour, misconceptions fuel the epidemic, and HIV and AIDS “captures the community in its net”. Drawing on the findings and in response to the secondary research question, What guidelines can be developed to assist educators to facilitate learners taking action against the spread of HIV and AIDS?, several guidelines were developed. They suggest that teachers should use participatory pedagogies to engage secondary school learners when teaching HIV and AIDS, build self-esteem in their learners, assist learners in dealing with peer pressure, engage learners in erasing misconceptions, and enable learners to break free from being “caught in the net” of HIV and AIDS. Collectively these guidelines could enable learners to take action in protecting themselves and their community against the spread of the HI virus. The study concludes that the views that Coloured secondary school learners from a rural town have about HIV and AIDS show their awareness of the realities of the epidemic affecting the individual, the family, the school and their community. They have constructed their views of HIV and AIDS in a way which shows their understanding of the complexities of the epidemic.
- Full Text:
- Date Issued: 2015
Violence: an exploratory study of the lived experiences of violent re-offending youth
- Authors: O'Connell, Tracy
- Date: 2015
- Subjects: Criminal psychology -- South Africa -- Eastern Cape , Violent crimes -- South Africa -- Eastern Cape , Ecological Systems Theory -- South Africa -- Eastern Cape , Violent offenders -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/5236 , vital:20823
- Description: Although much research has been conducted on violence, its effects, and which circumstances put an individual at risk of becoming a potential victim, there is a paucity of studies that focus on the perpetrators of violence. Much of the literature available on this subject is dated, providing information which is already dated and, frequently no longer relevant. This research has sought to explore and understand violent crimes from the psychological and emotional standpoint of the individual who perpetrated them. One objective of the study was to facilitate the development of a profile of youths who chronically commit crime, and more specifically crimes of violence. This study utilised the qualitative research design of Phenomenology, which allows for the exploration of the phenomena from the perspective of the participants. The sample for this study consisted of five male individuals who are currently incarcerated in a correctional institution situated in the Eastern Cape. The sample was chosen according to the non-probability purposive-sampling technique, based on their relevance to the study. The selected male offenders from the correctional institution ages ranged between 18 and 31. Specific criteria were identified against which participants were measured in order to be selected to participate in the research. Data was obtained from the participants via a questionnaire, a journal, and semi-structured interviews conducted by the researcher. Other data for the study was obtained from official documents. The study was embedded in the ecological theory of Bronfenbrenner, which provided the psychological framework in which to explain and understand the results of the study and the development of violence. The major findings of this study include; growing up violently, the reasons for violence, justificationa and perseptions of violence, society and the culture of 10 violence, and the environmental impact. These findings will contribute to the development of treatment programmes, which better facilitate the reformation and rehabilitation of criminals.
- Full Text:
- Date Issued: 2015
- Authors: O'Connell, Tracy
- Date: 2015
- Subjects: Criminal psychology -- South Africa -- Eastern Cape , Violent crimes -- South Africa -- Eastern Cape , Ecological Systems Theory -- South Africa -- Eastern Cape , Violent offenders -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/5236 , vital:20823
- Description: Although much research has been conducted on violence, its effects, and which circumstances put an individual at risk of becoming a potential victim, there is a paucity of studies that focus on the perpetrators of violence. Much of the literature available on this subject is dated, providing information which is already dated and, frequently no longer relevant. This research has sought to explore and understand violent crimes from the psychological and emotional standpoint of the individual who perpetrated them. One objective of the study was to facilitate the development of a profile of youths who chronically commit crime, and more specifically crimes of violence. This study utilised the qualitative research design of Phenomenology, which allows for the exploration of the phenomena from the perspective of the participants. The sample for this study consisted of five male individuals who are currently incarcerated in a correctional institution situated in the Eastern Cape. The sample was chosen according to the non-probability purposive-sampling technique, based on their relevance to the study. The selected male offenders from the correctional institution ages ranged between 18 and 31. Specific criteria were identified against which participants were measured in order to be selected to participate in the research. Data was obtained from the participants via a questionnaire, a journal, and semi-structured interviews conducted by the researcher. Other data for the study was obtained from official documents. The study was embedded in the ecological theory of Bronfenbrenner, which provided the psychological framework in which to explain and understand the results of the study and the development of violence. The major findings of this study include; growing up violently, the reasons for violence, justificationa and perseptions of violence, society and the culture of 10 violence, and the environmental impact. These findings will contribute to the development of treatment programmes, which better facilitate the reformation and rehabilitation of criminals.
- Full Text:
- Date Issued: 2015
Visible light transformation of Rhodamine 6G using tetracarbazole zinc phthalocyanine when embedded in electrospun fibers and in the presence of ZnO and Ag particles
- Khoza, Phindile, Nyokong, Tebello
- Authors: Khoza, Phindile , Nyokong, Tebello
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189456 , vital:44848 , xlink:href="https://doi.org/10.1080/00958972.2015.1013944"
- Description: Herein, we report the photocatalytic transformation of Rhodamine 6G (Rh 6G) using tetracarbazole zinc phthalocyanine (TCbZnPc) when alone or when conjugated with ZnO macroparticles (ZnOMPs) and silver nanoparticles (AgNPs), represented as TCbZnPc–ZnOMPs and TCbZnPc–AgNPs, respectively. The photocatalysts were supported onto electrospun polystyrene fibers. The efficiency of TCbZnPc was improved by the presence of both ZnOMPs and AgNPs. HPLC equipped with UV–vis was used to study phototransformation products. The mechanism of transformation was via the N-de-ethylation of Rh 6G.
- Full Text:
- Date Issued: 2015
- Authors: Khoza, Phindile , Nyokong, Tebello
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189456 , vital:44848 , xlink:href="https://doi.org/10.1080/00958972.2015.1013944"
- Description: Herein, we report the photocatalytic transformation of Rhodamine 6G (Rh 6G) using tetracarbazole zinc phthalocyanine (TCbZnPc) when alone or when conjugated with ZnO macroparticles (ZnOMPs) and silver nanoparticles (AgNPs), represented as TCbZnPc–ZnOMPs and TCbZnPc–AgNPs, respectively. The photocatalysts were supported onto electrospun polystyrene fibers. The efficiency of TCbZnPc was improved by the presence of both ZnOMPs and AgNPs. HPLC equipped with UV–vis was used to study phototransformation products. The mechanism of transformation was via the N-de-ethylation of Rh 6G.
- Full Text:
- Date Issued: 2015
Visible light transformation of Rhodamine 6G using tetracarbazole zinc phthalocyanine when embedded in electrospun fibers and in the presence of ZnO and Ag particles
- Khoza, Phindile, Nyokong, Tebello
- Authors: Khoza, Phindile , Nyokong, Tebello
- Date: 2015
- Language: English
- Type: Article
- Identifier: vital:7246 , http://hdl.handle.net/10962/d1020251
- Description: Herein, we report the photocatalytic transformation of Rhodamine 6G (Rh 6G) using tetracarbazole zinc phthalocyanine (TCbZnPc) when alone or when conjugated with ZnO macroparticles (ZnOMPs) and silver nanoparticles (AgNPs), represented as TCbZnPc–ZnOMPs and TCbZnPc–AgNPs, respectively. The photocatalysts were supported onto electrospun polystyrene fibers. The efficiency of TCbZnPc was improved by the presence of both ZnOMPs and AgNPs. HPLC equipped with UV–vis was used to study phototransformation products. The mechanism of transformation was via the N-de-ethylation of Rh 6G. , Original publication is available at http://dx.doi.org/10.1080/00958972.2015.1013944
- Full Text: false
- Date Issued: 2015
- Authors: Khoza, Phindile , Nyokong, Tebello
- Date: 2015
- Language: English
- Type: Article
- Identifier: vital:7246 , http://hdl.handle.net/10962/d1020251
- Description: Herein, we report the photocatalytic transformation of Rhodamine 6G (Rh 6G) using tetracarbazole zinc phthalocyanine (TCbZnPc) when alone or when conjugated with ZnO macroparticles (ZnOMPs) and silver nanoparticles (AgNPs), represented as TCbZnPc–ZnOMPs and TCbZnPc–AgNPs, respectively. The photocatalysts were supported onto electrospun polystyrene fibers. The efficiency of TCbZnPc was improved by the presence of both ZnOMPs and AgNPs. HPLC equipped with UV–vis was used to study phototransformation products. The mechanism of transformation was via the N-de-ethylation of Rh 6G. , Original publication is available at http://dx.doi.org/10.1080/00958972.2015.1013944
- Full Text: false
- Date Issued: 2015
Visible Wars and Invisible Women: interrogating women's roles during wartime in Goretti Kyomuhendo's Waiting: a novel of Uganda at war
- Authors: Spencer, Lynda G
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/138880 , vital:37682 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC177790
- Description: Goretti Kyomuhendo's Waiting: A Novel of Uganda at War explores the atrocities that ordinary people experience during wartime by placing emphasis on the private suffering and humiliation inflicted on women in the domestic space of the home. This article argues that even if women do not actively feature on the battleground, they are still inadvertently drawn into the war, which has an adverse impact on their lives. Kyomuhendo draws on the experiences of different female characters to problematize the inherently ambiguous symbolic image of the mother, and shows that the violence performed on women's bodies is a result of the interplay between two hegemonic forces, patriarchal authority and state power.
- Full Text:
- Date Issued: 2015
- Authors: Spencer, Lynda G
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/138880 , vital:37682 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC177790
- Description: Goretti Kyomuhendo's Waiting: A Novel of Uganda at War explores the atrocities that ordinary people experience during wartime by placing emphasis on the private suffering and humiliation inflicted on women in the domestic space of the home. This article argues that even if women do not actively feature on the battleground, they are still inadvertently drawn into the war, which has an adverse impact on their lives. Kyomuhendo draws on the experiences of different female characters to problematize the inherently ambiguous symbolic image of the mother, and shows that the violence performed on women's bodies is a result of the interplay between two hegemonic forces, patriarchal authority and state power.
- Full Text:
- Date Issued: 2015