A comparative photophysicochemical study of mono substituted phthalocyanines grafted onto silica nanoparticles
- Fashina, Adebayo, Antunes, Edith M, Nyokong, Tebello
- Authors: Fashina, Adebayo , Antunes, Edith M , Nyokong, Tebello
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/193844 , vital:45399 , xlink:href="https://doi.org/10.1142/S1088424614500138"
- Description: In this study, we report on the covalent linking of carboxylic acid functionalized silica nanoparticles with zinc phthalocyanine mono-substituted non-peripherally and peripherally with either a 4-amino phenoxy (1, peripheral and 2, non-peripheral) or an amino group (3 peripheral). The grafting is achieved via the formation of an amide bond between the carboxylic acid of the silica nanoparticles and the amino group of the phthalocyanine complexes. The hybrid nanoparticles retained the amorphous nature of silica nanoparticles after conjugation. A slight decrease in fluorescence and a general improvement in triplet quantum yields compared to free Pcs were observed. Triplet lifetimes for 2-SiNPs and 3-SiNPs also improved when compared to the free phthalocyanine. The changes in singlet oxygen quantum yields upon conjugation were minimal.
- Full Text:
- Date Issued: 2014
- Authors: Fashina, Adebayo , Antunes, Edith M , Nyokong, Tebello
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/193844 , vital:45399 , xlink:href="https://doi.org/10.1142/S1088424614500138"
- Description: In this study, we report on the covalent linking of carboxylic acid functionalized silica nanoparticles with zinc phthalocyanine mono-substituted non-peripherally and peripherally with either a 4-amino phenoxy (1, peripheral and 2, non-peripheral) or an amino group (3 peripheral). The grafting is achieved via the formation of an amide bond between the carboxylic acid of the silica nanoparticles and the amino group of the phthalocyanine complexes. The hybrid nanoparticles retained the amorphous nature of silica nanoparticles after conjugation. A slight decrease in fluorescence and a general improvement in triplet quantum yields compared to free Pcs were observed. Triplet lifetimes for 2-SiNPs and 3-SiNPs also improved when compared to the free phthalocyanine. The changes in singlet oxygen quantum yields upon conjugation were minimal.
- Full Text:
- Date Issued: 2014
Conscientious objection to performing same-sex marriage in South Africa
- Authors: Kruuse, Helen
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/129186 , vital:36228 , https://doi.org/10.1093/lawfam/ebu001
- Description: This article considers whether public servants should be exempt from South Africa’s equality provisions and anti-discrimination legislation in solemnizing same-sex marriages. In order to deal with this question, the article analyses the treatment of freedom of conscience and conscientious objection by comparing the solemnization of same-sex marriage by public servants, with another public service: that of terminations of pregnancy. While each situation will inevitably turn on the particular circumstances of the case, I argue that there should be a content-neutral guiding principle (as well as consistency) in dealing with these situations. The issue in each situation is narrowed to whether a civil servant’s personal convictions can override the state’s secular obligations in providing a service, and whether there is room for a qualified right to conscientious objection. By analysing the matter in this way, it is clear that the unqualified statutory exemption clause in South Africa’s Civil Union Act is constitutionally objectionable.
- Full Text: false
- Date Issued: 2014
- Authors: Kruuse, Helen
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/129186 , vital:36228 , https://doi.org/10.1093/lawfam/ebu001
- Description: This article considers whether public servants should be exempt from South Africa’s equality provisions and anti-discrimination legislation in solemnizing same-sex marriages. In order to deal with this question, the article analyses the treatment of freedom of conscience and conscientious objection by comparing the solemnization of same-sex marriage by public servants, with another public service: that of terminations of pregnancy. While each situation will inevitably turn on the particular circumstances of the case, I argue that there should be a content-neutral guiding principle (as well as consistency) in dealing with these situations. The issue in each situation is narrowed to whether a civil servant’s personal convictions can override the state’s secular obligations in providing a service, and whether there is room for a qualified right to conscientious objection. By analysing the matter in this way, it is clear that the unqualified statutory exemption clause in South Africa’s Civil Union Act is constitutionally objectionable.
- Full Text: false
- Date Issued: 2014
A systematic review of the effectiveness of animal-assisted interventions
- Authors: Badenhorst, Estelle
- Date: 2014
- Subjects: Animals -- Therapeutic use , Human-animal relationships
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9980 , http://hdl.handle.net/10948/d1021139
- Description: There is a global increase in research on the benefits of animals and the value of incorporating them into interventional practices. This is referred to as animal-assisted interventions. Due to the novelty of this type of intervention and the accompanying complexity of variables, a need exists to explore the various aspects within these interventions. Looking specifically at animal-assisted interventions within the mental health field, this study focuses on the psycho-therapeutic value of companion animals, such as dogs and cats. The primary aim of this study was to identify the mechanisms through which an animal-assisted intervention exerts its influence. A secondary aim was to indentify salient methodological aspects within the included studies. A systematic review of existing literature was undertaken to explore these factors. Each study was appraised against specific inclusion and exclusion criteria and themes were extracted. The data was synthesised, integrated and discussed in relation to previously conducted studies in relevant fields. Six themes emerged from the systematic review. These included enhanced comfort, the living nature of animals, physical contact, adjunctive nature, an affinity for animals, as well as methodological considerations. Based on these emergent themes conclusions were drawn as to the psycho-therapeutic influences of companion animals. This may serve as informative knowledge regarding animal-assisted interventions for practitioners seeking additional methods to reach treatment goals. Information is also provided for researchers interested in the field, particularly methodological considerations, before embarking on a study of animal-assisted intervention efficacy.
- Full Text:
- Date Issued: 2014
- Authors: Badenhorst, Estelle
- Date: 2014
- Subjects: Animals -- Therapeutic use , Human-animal relationships
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9980 , http://hdl.handle.net/10948/d1021139
- Description: There is a global increase in research on the benefits of animals and the value of incorporating them into interventional practices. This is referred to as animal-assisted interventions. Due to the novelty of this type of intervention and the accompanying complexity of variables, a need exists to explore the various aspects within these interventions. Looking specifically at animal-assisted interventions within the mental health field, this study focuses on the psycho-therapeutic value of companion animals, such as dogs and cats. The primary aim of this study was to identify the mechanisms through which an animal-assisted intervention exerts its influence. A secondary aim was to indentify salient methodological aspects within the included studies. A systematic review of existing literature was undertaken to explore these factors. Each study was appraised against specific inclusion and exclusion criteria and themes were extracted. The data was synthesised, integrated and discussed in relation to previously conducted studies in relevant fields. Six themes emerged from the systematic review. These included enhanced comfort, the living nature of animals, physical contact, adjunctive nature, an affinity for animals, as well as methodological considerations. Based on these emergent themes conclusions were drawn as to the psycho-therapeutic influences of companion animals. This may serve as informative knowledge regarding animal-assisted interventions for practitioners seeking additional methods to reach treatment goals. Information is also provided for researchers interested in the field, particularly methodological considerations, before embarking on a study of animal-assisted intervention efficacy.
- Full Text:
- Date Issued: 2014
Reviewing the definition of the natural resource curse and analysing its occurence post-1990
- Authors: Mwansa, Mumamba Chitumwa
- Date: 2014
- Subjects: Resource curse , Natural resources -- Management , Economic development , National income
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1100 , http://hdl.handle.net/10962/d1013243
- Description: That countries with high natural resource abundance should experience slower economic growth than those with low resource abundance seems contrary to what would be expected, considering the developmental head-start such resources afford. Yet Sachs and Warner (1997) found that economies with a high share of natural resource exports in national income in 1970 tended to experience slower economic growth in the two decades that followed. This finding, that natural resources are a “curse” rather than a blessing, has become generally accepted. This thesis sought to test whether the conclusion drawn from their data – that higher natural resource abundance leads to slower economic growth – is still correct. It sought to test their findings first by correcting for their use of resource intensity (natural resources share of exports) as a proxy for abundance. Using measures of resource abundance for 1995 as a proxy for abundance in previous decades, it was found that higher resource abundance was not associated with lower economic growth in the 1970s and 1980s. This finding is contrary to that of Sachs and Warner (1997, 2001). Secondly, this thesis tested whether the natural resource curse effect was still present for the period 1995–2010. This was done by observing the effect of both resource abundance and resource intensity on economic growth during 1995–2010. In both cases no resource curse effect was found, for this more recent period. The resource curse had disappeared regardless of whether one uses Sachs and Warner’s (1997, 2001) measure of resource intensity or a measure of resource abundance. Natural resources should therefore no longer be considered a “curse”. In explaining the difference for the impact of resource intensity between the 1970-90 period measured by Sachs and Warner (1997, 2001) and the more recent period 1995-2010 it was found that the Dutch Disease effect has decreased significantly since the 1970s and 1980s. This could partly explain why the resource curse has disappeared when measured in terms of resource intensity. Thus it was concluded that the natural resource curse existed in the period 1970-90 only when measured in terms of resource intensity but not when measured relative to resource abundance. The negative effects of natural resources on economic growth have disappeared in terms of both resource intensity and resource abundance in the more recent time period.
- Full Text:
- Date Issued: 2014
- Authors: Mwansa, Mumamba Chitumwa
- Date: 2014
- Subjects: Resource curse , Natural resources -- Management , Economic development , National income
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1100 , http://hdl.handle.net/10962/d1013243
- Description: That countries with high natural resource abundance should experience slower economic growth than those with low resource abundance seems contrary to what would be expected, considering the developmental head-start such resources afford. Yet Sachs and Warner (1997) found that economies with a high share of natural resource exports in national income in 1970 tended to experience slower economic growth in the two decades that followed. This finding, that natural resources are a “curse” rather than a blessing, has become generally accepted. This thesis sought to test whether the conclusion drawn from their data – that higher natural resource abundance leads to slower economic growth – is still correct. It sought to test their findings first by correcting for their use of resource intensity (natural resources share of exports) as a proxy for abundance. Using measures of resource abundance for 1995 as a proxy for abundance in previous decades, it was found that higher resource abundance was not associated with lower economic growth in the 1970s and 1980s. This finding is contrary to that of Sachs and Warner (1997, 2001). Secondly, this thesis tested whether the natural resource curse effect was still present for the period 1995–2010. This was done by observing the effect of both resource abundance and resource intensity on economic growth during 1995–2010. In both cases no resource curse effect was found, for this more recent period. The resource curse had disappeared regardless of whether one uses Sachs and Warner’s (1997, 2001) measure of resource intensity or a measure of resource abundance. Natural resources should therefore no longer be considered a “curse”. In explaining the difference for the impact of resource intensity between the 1970-90 period measured by Sachs and Warner (1997, 2001) and the more recent period 1995-2010 it was found that the Dutch Disease effect has decreased significantly since the 1970s and 1980s. This could partly explain why the resource curse has disappeared when measured in terms of resource intensity. Thus it was concluded that the natural resource curse existed in the period 1970-90 only when measured in terms of resource intensity but not when measured relative to resource abundance. The negative effects of natural resources on economic growth have disappeared in terms of both resource intensity and resource abundance in the more recent time period.
- Full Text:
- Date Issued: 2014
Influence of anthropogenic stressors on the behaviour and mortality of the endangered African penguin
- Authors: Nyengera, Reason
- Date: 2014
- Subjects: African penguin -- South Africa -- Algoa Bay , Birds -- Mortality -- South Africa -- Algoa Bay , Endangered species -- Breeding -- South Africa -- Algoa Bay
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/3064 , vital:20395
- Description: This study investigated the potential impacts of several anthropogenic stressors on the movement and survival of African penguins in Algoa Bay, taking into account prey availability and environmental conditions (sea surface temperature and chlorophyll productivity). The primary drive for the study was based on the seismic exploration, which took place in the habitat of the endangered African penguin. The research was also carried out to understand how pelagic fishing and prey availability influence the broader behavioural and mortality aspects of penguins. To achieve this goal, I used monthly beach surveys to assess seabird mortality, admissions of penguins in rehabilitation centres and the monitoring of breeding penguins’ movement at sea through individual GPS tracking. In addition, prey distribution and abundance were monitored with acoustic surveys to assess potential changes in relation anthropogenic stressors. Breeding African penguins did not react dramatically to seismic activities, except on St Croix Island where they changed their foraging direction during the seismic period. There was no evidence of a siginficant increase in African penguin carcasses encountered or strandings along the beaches during the period of seismic activity. However, a sharp increase in encounter rate was recorded soon after seismic operations, which may potentially indicate a delay between the effect of seismic activities on penguin mortality and the encounter of the related carcasses after the operation. However, the impact of seismic surveys on penguins may be long-term rather than short term, and additional studies would be needed to reveal long-term effects of seismic activities, if any. Foraging effort of breeding African penguins increased substantially in the presence of commercial fishing activities within close proximity to the colonies. To a greater extent, at-sea movement patterns and counts of beach cast carcasses were largely influenced by prey availability. Penguins spent more time at sea, traveled longer and covered a larger foraging area during periods of relatvely low pelagic fish abundance. There was also a sharp increase in African penguin mortality during periods of low prey availability in the Bay. However, environmental conditions showed some influence over these interactions. Foraging effort of breeding African penguins increased substantially in the presence of commercial fishing activities within close proximity to the colonies. To a greater extent, at-sea movement patterns and counts of beach cast carcasses were largely influenced by prey availability. Penguins spent more time at sea, traveled longer and covered a larger foraging area during periods of relatvely low pelagic fish abundance. There was also a sharp increase in African penguin mortality during periods of low prey availability in the Bay. However, environmental conditions showed some influence over these interactions. For example a red tide event during in period of low prey availability, made it difficult to understand impacts of prey on penguins difficult. Both anthropogenic stressors and environmental conditions influenced African penguins’ behaviour and survival. Due to the worrying trend of African penguins in South Africa for the past few years, all conservation management efforts to increase penguin numbers and limit their mortality are necessary. This study highlights the negative impact of industrial fishing on this Endangered species and the rapid increase in mortality of penguins during times of low prey availability. A network of Marine Protected Areas would certainly increase food availability to African penguins by limiting competition with fisheries, and contribute to increasing the population numbers.
- Full Text:
- Date Issued: 2014
- Authors: Nyengera, Reason
- Date: 2014
- Subjects: African penguin -- South Africa -- Algoa Bay , Birds -- Mortality -- South Africa -- Algoa Bay , Endangered species -- Breeding -- South Africa -- Algoa Bay
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/3064 , vital:20395
- Description: This study investigated the potential impacts of several anthropogenic stressors on the movement and survival of African penguins in Algoa Bay, taking into account prey availability and environmental conditions (sea surface temperature and chlorophyll productivity). The primary drive for the study was based on the seismic exploration, which took place in the habitat of the endangered African penguin. The research was also carried out to understand how pelagic fishing and prey availability influence the broader behavioural and mortality aspects of penguins. To achieve this goal, I used monthly beach surveys to assess seabird mortality, admissions of penguins in rehabilitation centres and the monitoring of breeding penguins’ movement at sea through individual GPS tracking. In addition, prey distribution and abundance were monitored with acoustic surveys to assess potential changes in relation anthropogenic stressors. Breeding African penguins did not react dramatically to seismic activities, except on St Croix Island where they changed their foraging direction during the seismic period. There was no evidence of a siginficant increase in African penguin carcasses encountered or strandings along the beaches during the period of seismic activity. However, a sharp increase in encounter rate was recorded soon after seismic operations, which may potentially indicate a delay between the effect of seismic activities on penguin mortality and the encounter of the related carcasses after the operation. However, the impact of seismic surveys on penguins may be long-term rather than short term, and additional studies would be needed to reveal long-term effects of seismic activities, if any. Foraging effort of breeding African penguins increased substantially in the presence of commercial fishing activities within close proximity to the colonies. To a greater extent, at-sea movement patterns and counts of beach cast carcasses were largely influenced by prey availability. Penguins spent more time at sea, traveled longer and covered a larger foraging area during periods of relatvely low pelagic fish abundance. There was also a sharp increase in African penguin mortality during periods of low prey availability in the Bay. However, environmental conditions showed some influence over these interactions. Foraging effort of breeding African penguins increased substantially in the presence of commercial fishing activities within close proximity to the colonies. To a greater extent, at-sea movement patterns and counts of beach cast carcasses were largely influenced by prey availability. Penguins spent more time at sea, traveled longer and covered a larger foraging area during periods of relatvely low pelagic fish abundance. There was also a sharp increase in African penguin mortality during periods of low prey availability in the Bay. However, environmental conditions showed some influence over these interactions. For example a red tide event during in period of low prey availability, made it difficult to understand impacts of prey on penguins difficult. Both anthropogenic stressors and environmental conditions influenced African penguins’ behaviour and survival. Due to the worrying trend of African penguins in South Africa for the past few years, all conservation management efforts to increase penguin numbers and limit their mortality are necessary. This study highlights the negative impact of industrial fishing on this Endangered species and the rapid increase in mortality of penguins during times of low prey availability. A network of Marine Protected Areas would certainly increase food availability to African penguins by limiting competition with fisheries, and contribute to increasing the population numbers.
- Full Text:
- Date Issued: 2014
The lived experiences of HIV-positive women in poverty
- Msengana, Sweetlener Thobeka
- Authors: Msengana, Sweetlener Thobeka
- Date: 2014
- Subjects: HIV-positive women -- South Africa -- Grahamstown , HIV infections -- Psychological aspects -- South Africa -- Grahamstown , HIV infections -- Social aspects -- South Africa -- Grahamstown , Poor -- South Africa -- Grahamstown , Poverty -- Social aspects -- South Africa -- Grahamstown , Poverty -- Psychological aspects -- South Africa -- Grahamstown , Stigma (Social psychology) -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3240 , http://hdl.handle.net/10962/d1013269
- Description: The focus of this study was on the experiences of a small sample of local women who are HIVpositive and are living in poverty. The researcher was interested in exploring the psychological and social experiences of these women using Interpretive Phenomenological Analysis. This research aimed at giving these women a voice to express their first-hand, personal accounts of living with HIV in poverty. Data was analysed for meaningful units, which were interpreted inductively and hermeneutically, and categorised into super-ordinate themes. Six themes within the participants' experiences of living with HIV were determined, namely: (I) experiences of diagnosis, (2) disclosure experiences, (3) stigma, (4) ARV experiences, (5) experiences of social support and (6) poverty. This research found that after an HIV-positive diagnosis, most women experience a variety of emotional reactions. These reactions however seem to change overtime into positive acceptance of the HIV diagnosis. Most of the women in this study preferred to use partial disclosure than to fully disclose their HJV-positive status openly to families, friends and to their community. Reasons for not using full disclosure included fear of discrimination and stigma, which included a fear of being rejected or being blamed for their status and a fear of losing relationships. It was also evident from the findings that most of the women had experienced stigma directly and therefore partial disclosure was used as a coping mechanism to protect the self from further harm. It was also revealed that stigma not only has a negative impact on disclosure but also on social support and ARV experiences. Because ofHIV-related stigma, lack of social support was a struggle that almost all the women in this study had experienced. Lack of understandings about their medication also had a negative impact of the ARV experiences. Stigmas along with poverty are the major struggles that HIV -positive women have to deal with in their day to day living. The findings of this study reveal a need for further research in this experiential area as well as campaigns and education around issues such as stigma, medication, and emotional difficulties associated with HIV.
- Full Text:
- Date Issued: 2014
- Authors: Msengana, Sweetlener Thobeka
- Date: 2014
- Subjects: HIV-positive women -- South Africa -- Grahamstown , HIV infections -- Psychological aspects -- South Africa -- Grahamstown , HIV infections -- Social aspects -- South Africa -- Grahamstown , Poor -- South Africa -- Grahamstown , Poverty -- Social aspects -- South Africa -- Grahamstown , Poverty -- Psychological aspects -- South Africa -- Grahamstown , Stigma (Social psychology) -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3240 , http://hdl.handle.net/10962/d1013269
- Description: The focus of this study was on the experiences of a small sample of local women who are HIVpositive and are living in poverty. The researcher was interested in exploring the psychological and social experiences of these women using Interpretive Phenomenological Analysis. This research aimed at giving these women a voice to express their first-hand, personal accounts of living with HIV in poverty. Data was analysed for meaningful units, which were interpreted inductively and hermeneutically, and categorised into super-ordinate themes. Six themes within the participants' experiences of living with HIV were determined, namely: (I) experiences of diagnosis, (2) disclosure experiences, (3) stigma, (4) ARV experiences, (5) experiences of social support and (6) poverty. This research found that after an HIV-positive diagnosis, most women experience a variety of emotional reactions. These reactions however seem to change overtime into positive acceptance of the HIV diagnosis. Most of the women in this study preferred to use partial disclosure than to fully disclose their HJV-positive status openly to families, friends and to their community. Reasons for not using full disclosure included fear of discrimination and stigma, which included a fear of being rejected or being blamed for their status and a fear of losing relationships. It was also evident from the findings that most of the women had experienced stigma directly and therefore partial disclosure was used as a coping mechanism to protect the self from further harm. It was also revealed that stigma not only has a negative impact on disclosure but also on social support and ARV experiences. Because ofHIV-related stigma, lack of social support was a struggle that almost all the women in this study had experienced. Lack of understandings about their medication also had a negative impact of the ARV experiences. Stigmas along with poverty are the major struggles that HIV -positive women have to deal with in their day to day living. The findings of this study reveal a need for further research in this experiential area as well as campaigns and education around issues such as stigma, medication, and emotional difficulties associated with HIV.
- Full Text:
- Date Issued: 2014
An investigation of a mathematics recovery programme for multiplicative reasoning to a group of learners in the South African context : a case study approach
- Authors: Mofu, Zanele Abegail
- Date: 2014
- Subjects: Multiplication -- Study and teaching (Elementary) -- South Africa -- Case studies , Mathematics -- Study and teaching (Elementary) -- South Africa -- Case studies , Learning -- Research -- South Africa , Mathematics -- Study and teaching -- Evaluation
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1991 , http://hdl.handle.net/10962/d1013333
- Description: This thesis describes an intervention using the Mathematics Recovery programme in a South African context with a small sample of Grade 4 learners. The study uses a qualitative case study approach. The data collection included video recorded one-to-one oral interviews with the learners. I used the Learning Framework in Number (LFIN) developed by Wright, Martland, Stafford and Stanger (2006) to profile the learners using pre and post intervention interview data and to determine their levels of multiplicative reasoning. The analysis showed the positive impact of the Mathematics Recovery programme on the improvement of multiplicative reasoning. The study contributes to the use of Mathematics Recovery programmes in South Africa from both a teacher and teacher educator perspective.
- Full Text:
- Date Issued: 2014
- Authors: Mofu, Zanele Abegail
- Date: 2014
- Subjects: Multiplication -- Study and teaching (Elementary) -- South Africa -- Case studies , Mathematics -- Study and teaching (Elementary) -- South Africa -- Case studies , Learning -- Research -- South Africa , Mathematics -- Study and teaching -- Evaluation
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1991 , http://hdl.handle.net/10962/d1013333
- Description: This thesis describes an intervention using the Mathematics Recovery programme in a South African context with a small sample of Grade 4 learners. The study uses a qualitative case study approach. The data collection included video recorded one-to-one oral interviews with the learners. I used the Learning Framework in Number (LFIN) developed by Wright, Martland, Stafford and Stanger (2006) to profile the learners using pre and post intervention interview data and to determine their levels of multiplicative reasoning. The analysis showed the positive impact of the Mathematics Recovery programme on the improvement of multiplicative reasoning. The study contributes to the use of Mathematics Recovery programmes in South Africa from both a teacher and teacher educator perspective.
- Full Text:
- Date Issued: 2014
Breast cancer: current developments in molecular approaches to diagnosis and treatment
- de la Mare, Jo-Anne, Contu, Lara, Hunter, Morgan C, Moyo, Buhle, Sterrenberg, Jason N, Dhanani, Karim C H, Mutsvunguma, Lorraine Z, Edkins, Adrienne L
- Authors: de la Mare, Jo-Anne , Contu, Lara , Hunter, Morgan C , Moyo, Buhle , Sterrenberg, Jason N , Dhanani, Karim C H , Mutsvunguma, Lorraine Z , Edkins, Adrienne L
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/164819 , vital:41175 , DOI: 10.2174/15748928113086660046
- Description: Due to the high heterogeneity of breast cancers, numerous recent patents describe improved methods of detection and classification which promise better patient prognosis and treatment. In particular, there has been a shift towards more effective genetic screening to identify specific mutations associated with breast tumours, which may lead to “personalised medicine” with improved outcomes. Two challenging areas of breast cancer research involve the development of treatments for the highly aggressive triple negative breast cancer subtype as well as the chemotherapy-resistant cancer stem cell subpopulation. In addition, despite numerous recent advances in breast cancer treatment in woman, male breast cancer remains poorly understood and there are limited therapies available which are developed specifically for men. This review serves to report on important developments in the treatment of breast malignancies patented in the past two years as well as to highlight the current gaps in the field of breast cancer therapeutics and areas which require further study.
- Full Text:
- Date Issued: 2014
- Authors: de la Mare, Jo-Anne , Contu, Lara , Hunter, Morgan C , Moyo, Buhle , Sterrenberg, Jason N , Dhanani, Karim C H , Mutsvunguma, Lorraine Z , Edkins, Adrienne L
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/164819 , vital:41175 , DOI: 10.2174/15748928113086660046
- Description: Due to the high heterogeneity of breast cancers, numerous recent patents describe improved methods of detection and classification which promise better patient prognosis and treatment. In particular, there has been a shift towards more effective genetic screening to identify specific mutations associated with breast tumours, which may lead to “personalised medicine” with improved outcomes. Two challenging areas of breast cancer research involve the development of treatments for the highly aggressive triple negative breast cancer subtype as well as the chemotherapy-resistant cancer stem cell subpopulation. In addition, despite numerous recent advances in breast cancer treatment in woman, male breast cancer remains poorly understood and there are limited therapies available which are developed specifically for men. This review serves to report on important developments in the treatment of breast malignancies patented in the past two years as well as to highlight the current gaps in the field of breast cancer therapeutics and areas which require further study.
- Full Text:
- Date Issued: 2014
Rise and fall of apartheid: photography and the bureaucracy of everyday life
- Authors: Simbao, Ruth K
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147604 , vital:38653 , DOI: 10.1080/02533952.2014.998052
- Description: The exhibition catalogue Rise and Fall of Apartheid is a valuable collection of photographic images that create, according to Enwezor, “a critical visualization and interrogation of […] [apartheid’s] normative symbols, signs and representation” (18). The catalogue focuses on African subjects as “agents of their own emancipation” (18), and contextualises South Africa’s anticipation of the end of apartheid within broader global changes in the late 1980s. Essays by Okwui Enwezor, Michael Godby, Achille Mbembe, Darren Newbury, Colin Richards, Patricia Hayes, Andries Walter Olifant, Rory Bester and Khwezi Gule are included in the catalogue, and are interspersed between photographic images that are grouped in chronological clusters: 1948–1959; 1960–1969; 1970–1979; 1980–1989; and 1990–1995.
- Full Text:
- Date Issued: 2014
- Authors: Simbao, Ruth K
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147604 , vital:38653 , DOI: 10.1080/02533952.2014.998052
- Description: The exhibition catalogue Rise and Fall of Apartheid is a valuable collection of photographic images that create, according to Enwezor, “a critical visualization and interrogation of […] [apartheid’s] normative symbols, signs and representation” (18). The catalogue focuses on African subjects as “agents of their own emancipation” (18), and contextualises South Africa’s anticipation of the end of apartheid within broader global changes in the late 1980s. Essays by Okwui Enwezor, Michael Godby, Achille Mbembe, Darren Newbury, Colin Richards, Patricia Hayes, Andries Walter Olifant, Rory Bester and Khwezi Gule are included in the catalogue, and are interspersed between photographic images that are grouped in chronological clusters: 1948–1959; 1960–1969; 1970–1979; 1980–1989; and 1990–1995.
- Full Text:
- Date Issued: 2014
The management of knowledge workers for the benefit of an organisation
- Authors: Javu, Thobela Terrence
- Date: 2014
- Subjects: Knowledge workers , Knowledge management , Intellectual capital
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8840 , http://hdl.handle.net/10948/d1020004
- Description: The main research problem in this study was to identify strategies that could assist South Afrian companies in managing knowledge workers for their opt imal benefit . To achieve this goal, the following act ions were ta ken: Aliterature study was conducted to identify the best strategies that South African companies could use to manage knowledge workers for optimal benefit; Following the literature review interviews were concluded with key people in the human resource and recruitment industry to determine how a knowledge worker was defined in their organisations as well as to probe what management and human resources strategies were used to manage knowledge workers to their full potential; The interviews, in addition to the literature study, also served as a basis for a survey questionnaire, which was used to probe the views of knowledge workers to determine tools and strategies managers use to manage them. The empirical results from the study showed some concurrence with best strategies suggested from the theoret ical study. In essence, the study revealed that knowledge was well managed in the organisations where the study was conducted and that the knowledge workers were motivated and productive. However, it appeared that there was uncer tainty around the remuneration, rewards and recognition of these employees, which could ultimately reflect in less promising levels of commitment and lower levels of retention. The main findings were that: knowledge workers should be recognised for their good performance by providing financial incentives; knowledge workers should be provided with opportunities to continuously develop their competencies but be allowed to craft their own developmental experiences; knowledge workers should be empowered by delegat ing tasks to them that carry decision making responsibility and af fectinnovation; and Managers and knowledge workers should cont inuously have performance and organisational development discussions.
- Full Text:
- Date Issued: 2014
- Authors: Javu, Thobela Terrence
- Date: 2014
- Subjects: Knowledge workers , Knowledge management , Intellectual capital
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8840 , http://hdl.handle.net/10948/d1020004
- Description: The main research problem in this study was to identify strategies that could assist South Afrian companies in managing knowledge workers for their opt imal benefit . To achieve this goal, the following act ions were ta ken: Aliterature study was conducted to identify the best strategies that South African companies could use to manage knowledge workers for optimal benefit; Following the literature review interviews were concluded with key people in the human resource and recruitment industry to determine how a knowledge worker was defined in their organisations as well as to probe what management and human resources strategies were used to manage knowledge workers to their full potential; The interviews, in addition to the literature study, also served as a basis for a survey questionnaire, which was used to probe the views of knowledge workers to determine tools and strategies managers use to manage them. The empirical results from the study showed some concurrence with best strategies suggested from the theoret ical study. In essence, the study revealed that knowledge was well managed in the organisations where the study was conducted and that the knowledge workers were motivated and productive. However, it appeared that there was uncer tainty around the remuneration, rewards and recognition of these employees, which could ultimately reflect in less promising levels of commitment and lower levels of retention. The main findings were that: knowledge workers should be recognised for their good performance by providing financial incentives; knowledge workers should be provided with opportunities to continuously develop their competencies but be allowed to craft their own developmental experiences; knowledge workers should be empowered by delegat ing tasks to them that carry decision making responsibility and af fectinnovation; and Managers and knowledge workers should cont inuously have performance and organisational development discussions.
- Full Text:
- Date Issued: 2014
The "old-new" challenges of water, sanitation and bioremediation in developing countries
- Authors: Tandlich, Roman
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/75982 , vital:30489 , DOI: 10.4172/2155-6199.1000e152
- Description: Developing countries face challenges in the development of infrastructure and population growth. These lead to “side-effects" such as uncontrolled urbanization and the fact that basic services such as water and sanitation are lagging behind the actual needs on the ground. Historical challenges, lack of skilled staff and often lack of sustained funding are some of the reasons for the status quo. Extent of water and sanitation coverage often forces national and local governments to install the minimum-standard solutions, e.g. the ventilated improved pit latrines. This improves the public health status in the short-term, but causes problem in the long run due to the lack of regular maintenance such as through lack emptying of pits. Sometimes, construction of these facilities is of inferior standard. Pits are often built without lining or zero consideration is given to the local conditions in terms of soil properties, water table and the number of toilet users.
- Full Text:
- Date Issued: 2014
- Authors: Tandlich, Roman
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/75982 , vital:30489 , DOI: 10.4172/2155-6199.1000e152
- Description: Developing countries face challenges in the development of infrastructure and population growth. These lead to “side-effects" such as uncontrolled urbanization and the fact that basic services such as water and sanitation are lagging behind the actual needs on the ground. Historical challenges, lack of skilled staff and often lack of sustained funding are some of the reasons for the status quo. Extent of water and sanitation coverage often forces national and local governments to install the minimum-standard solutions, e.g. the ventilated improved pit latrines. This improves the public health status in the short-term, but causes problem in the long run due to the lack of regular maintenance such as through lack emptying of pits. Sometimes, construction of these facilities is of inferior standard. Pits are often built without lining or zero consideration is given to the local conditions in terms of soil properties, water table and the number of toilet users.
- Full Text:
- Date Issued: 2014
The income tax implications resulting from the introduction of section 12N of the Income Tax Act
- Authors: Grebe, Alta-Mari
- Date: 2014
- Subjects: Income tax -- Law and legislation -- South Africa , Land tenure -- South Africa , Capital gains tax -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8966 , http://hdl.handle.net/10948/d1020787
- Description: Section 12N, introduction into the Income Tax Act by way of Taxation Laws Amendment Act and which became effective on 2 November 2010, provides for allowances on the leasehold improvements on government-owned land and land leased from certain tax exempt entities as stipulated in section 10 (1) (cA) and (t). As section 12N deems the lessee to be the owner of the leasehold improvement, the lessee now qualifies for capital allowances which were previously disallowed.
- Full Text:
- Date Issued: 2014
- Authors: Grebe, Alta-Mari
- Date: 2014
- Subjects: Income tax -- Law and legislation -- South Africa , Land tenure -- South Africa , Capital gains tax -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8966 , http://hdl.handle.net/10948/d1020787
- Description: Section 12N, introduction into the Income Tax Act by way of Taxation Laws Amendment Act and which became effective on 2 November 2010, provides for allowances on the leasehold improvements on government-owned land and land leased from certain tax exempt entities as stipulated in section 10 (1) (cA) and (t). As section 12N deems the lessee to be the owner of the leasehold improvement, the lessee now qualifies for capital allowances which were previously disallowed.
- Full Text:
- Date Issued: 2014
Enhancing parental involvement in primary schools in disadvantaged communities
- Hendricks, Charlotte Augusta
- Authors: Hendricks, Charlotte Augusta
- Date: 2014
- Subjects: Education, Primary -- Parent participation -- South Africa -- Port Elizabeth , Parent-teacher relationships -- South Africa -- Port Elizabeth , Ecological Systems Theory
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9461 , http://hdl.handle.net/10948/d1020169
- Description: The main research question guiding this study is: “What strategies can be established to enhance parental involvement in primary schools in disadvantaged communities in the Northern Areas of Port Elizabeth”? To answer this question, this study examines parents’ and teachers’ practices concerning parental involvement in the Northern Areas of Nelson Mandela Metropolitan. Parents and teachers were purposely selected from participating schools. In this qualitative study, the researcher proposed strategies to enhance parental involvement at primary schools. Qualitative research methods, associated with phenomenological inquiry were employed to explore the life-world of the participants who have had personal experience with the phenomenon of parental involvement. Data was collected through semi-structured interviews with parents and teachers. This allowed the researcher to gather in-depth information about opinions, beliefs, practices and attitudes concerning the involvement of parents in their children’s education. Bronfenbrenner’s ecosystemic theory served as the theorectical framework of this investigation. Since this study is about parental involvement in primary schools educational policies like inclusive education as well as different models of parental involvement were investigated in the literature study. The results of the study indicated several barriers to the enhancement of parental involvement for instance communication barriers between parents and teachers. The researcher established four strategies for the enhancement of parental involvement and recommended that these strategies should be employed by schools and other stakeholders. She also made further recommendations for parents, teachers, school principals, Department of Basic Education and professionals in the community.
- Full Text:
- Date Issued: 2014
- Authors: Hendricks, Charlotte Augusta
- Date: 2014
- Subjects: Education, Primary -- Parent participation -- South Africa -- Port Elizabeth , Parent-teacher relationships -- South Africa -- Port Elizabeth , Ecological Systems Theory
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9461 , http://hdl.handle.net/10948/d1020169
- Description: The main research question guiding this study is: “What strategies can be established to enhance parental involvement in primary schools in disadvantaged communities in the Northern Areas of Port Elizabeth”? To answer this question, this study examines parents’ and teachers’ practices concerning parental involvement in the Northern Areas of Nelson Mandela Metropolitan. Parents and teachers were purposely selected from participating schools. In this qualitative study, the researcher proposed strategies to enhance parental involvement at primary schools. Qualitative research methods, associated with phenomenological inquiry were employed to explore the life-world of the participants who have had personal experience with the phenomenon of parental involvement. Data was collected through semi-structured interviews with parents and teachers. This allowed the researcher to gather in-depth information about opinions, beliefs, practices and attitudes concerning the involvement of parents in their children’s education. Bronfenbrenner’s ecosystemic theory served as the theorectical framework of this investigation. Since this study is about parental involvement in primary schools educational policies like inclusive education as well as different models of parental involvement were investigated in the literature study. The results of the study indicated several barriers to the enhancement of parental involvement for instance communication barriers between parents and teachers. The researcher established four strategies for the enhancement of parental involvement and recommended that these strategies should be employed by schools and other stakeholders. She also made further recommendations for parents, teachers, school principals, Department of Basic Education and professionals in the community.
- Full Text:
- Date Issued: 2014
Correlation and comparative analysis of traffic across five network telescopes
- Nkhumeleni, Thizwilondi Moses
- Authors: Nkhumeleni, Thizwilondi Moses
- Date: 2014
- Subjects: Sensor networks , Computer networks , TCP/IP (Computer network protocol) , Computer networks -- Management , Electronic data processing -- Management
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4693 , http://hdl.handle.net/10962/d1011668 , Sensor networks , Computer networks , TCP/IP (Computer network protocol) , Computer networks -- Management , Electronic data processing -- Management
- Description: Monitoring unused IP address space by using network telescopes provides a favourable environment for researchers to study and detect malware, worms, denial of service and scanning activities. Research in the field of network telescopes has progressed over the past decade resulting in the development of an increased number of overlapping datasets. Rhodes University's network of telescope sensors has continued to grow with additional network telescopes being brought online. At the time of writing, Rhodes University has a distributed network of five relatively small /24 network telescopes. With five network telescope sensors, this research focuses on comparative and correlation analysis of traffic activity across the network of telescope sensors. To aid summarisation and visualisation techniques, time series' representing time-based traffic activity, are constructed. By employing an iterative experimental process of captured traffic, two natural categories of the five network telescopes are presented. Using the cross- and auto-correlation methods of time series analysis, moderate correlation of traffic activity was achieved between telescope sensors in each category. Weak to moderate correlation was calculated when comparing category A and category B network telescopes' datasets. Results were significantly improved by studying TCP traffic separately. Moderate to strong correlation coefficients in each category were calculated when using TCP traffic only. UDP traffic analysis showed weaker correlation between sensors, however the uniformity of ICMP traffic showed correlation of traffic activity across all sensors. The results confirmed the visual observation of traffic relativity in telescope sensors within the same category and quantitatively analysed the correlation of network telescopes' traffic activity.
- Full Text:
- Date Issued: 2014
- Authors: Nkhumeleni, Thizwilondi Moses
- Date: 2014
- Subjects: Sensor networks , Computer networks , TCP/IP (Computer network protocol) , Computer networks -- Management , Electronic data processing -- Management
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4693 , http://hdl.handle.net/10962/d1011668 , Sensor networks , Computer networks , TCP/IP (Computer network protocol) , Computer networks -- Management , Electronic data processing -- Management
- Description: Monitoring unused IP address space by using network telescopes provides a favourable environment for researchers to study and detect malware, worms, denial of service and scanning activities. Research in the field of network telescopes has progressed over the past decade resulting in the development of an increased number of overlapping datasets. Rhodes University's network of telescope sensors has continued to grow with additional network telescopes being brought online. At the time of writing, Rhodes University has a distributed network of five relatively small /24 network telescopes. With five network telescope sensors, this research focuses on comparative and correlation analysis of traffic activity across the network of telescope sensors. To aid summarisation and visualisation techniques, time series' representing time-based traffic activity, are constructed. By employing an iterative experimental process of captured traffic, two natural categories of the five network telescopes are presented. Using the cross- and auto-correlation methods of time series analysis, moderate correlation of traffic activity was achieved between telescope sensors in each category. Weak to moderate correlation was calculated when comparing category A and category B network telescopes' datasets. Results were significantly improved by studying TCP traffic separately. Moderate to strong correlation coefficients in each category were calculated when using TCP traffic only. UDP traffic analysis showed weaker correlation between sensors, however the uniformity of ICMP traffic showed correlation of traffic activity across all sensors. The results confirmed the visual observation of traffic relativity in telescope sensors within the same category and quantitatively analysed the correlation of network telescopes' traffic activity.
- Full Text:
- Date Issued: 2014
Rhodes University Research Report 2014
- Rhodes University, Roberts, Jaine, Gillitt, Tarryn, Mantolo, Thumeka, Macgregor, Jill, Dore, Sally
- Authors: Rhodes University , Roberts, Jaine , Gillitt, Tarryn , Mantolo, Thumeka , Macgregor, Jill , Dore, Sally
- Date: 2014
- Language: English
- Type: Text
- Identifier: http://hdl.handle.net/10962/59309 , vital:27547
- Description: From Foreword by Dr Sizwe Mabizela: In the year under review, individual academics continued to receive widespread recognition for their work. Particularly noteworthy were the accolades that Distinguished Professor Tebello Nyokong continued to attract. In 2014 she was chosen as one of South Africa’s 21 Icons. Professor Nyokong was also appointed by United Nations Secretary- General Ban Ki-Moon to the High-Level Panel on Technology Bank For Least Developed Countries. Money cannot buy the kind of positive profile that Professor Nyokong brings to Rhodes. Professor Janice Limson was awarded the DST/NRF SARChI Chair in Science Communication. This brought to 11 the number of SARChI Chairs awarded to Rhodes University. Professor Heila Lotz-Sisitka was appointed as the inaugural Director of the new Postgraduate Studies Centre, to lead and manage the provision of additional support for enhancing the quality, quantity, and equity of our Postgraduate population. , A publication of the Rhodes University Research Office, compiled and edited by Jaine Roberts, Tarryn Gillitt, Thumeka Mantolo, Patricia Jacob and Jill Macgregor. Design and Layout: Sally Dore
- Full Text:
- Date Issued: 2014
- Authors: Rhodes University , Roberts, Jaine , Gillitt, Tarryn , Mantolo, Thumeka , Macgregor, Jill , Dore, Sally
- Date: 2014
- Language: English
- Type: Text
- Identifier: http://hdl.handle.net/10962/59309 , vital:27547
- Description: From Foreword by Dr Sizwe Mabizela: In the year under review, individual academics continued to receive widespread recognition for their work. Particularly noteworthy were the accolades that Distinguished Professor Tebello Nyokong continued to attract. In 2014 she was chosen as one of South Africa’s 21 Icons. Professor Nyokong was also appointed by United Nations Secretary- General Ban Ki-Moon to the High-Level Panel on Technology Bank For Least Developed Countries. Money cannot buy the kind of positive profile that Professor Nyokong brings to Rhodes. Professor Janice Limson was awarded the DST/NRF SARChI Chair in Science Communication. This brought to 11 the number of SARChI Chairs awarded to Rhodes University. Professor Heila Lotz-Sisitka was appointed as the inaugural Director of the new Postgraduate Studies Centre, to lead and manage the provision of additional support for enhancing the quality, quantity, and equity of our Postgraduate population. , A publication of the Rhodes University Research Office, compiled and edited by Jaine Roberts, Tarryn Gillitt, Thumeka Mantolo, Patricia Jacob and Jill Macgregor. Design and Layout: Sally Dore
- Full Text:
- Date Issued: 2014
Applications of lead phthalocyanines embedded in electrospun fibers for the photoinactivation of Escherichia coli in water
- Osifeko, Olawale L, Nyokong, Tebello
- Authors: Osifeko, Olawale L , Nyokong, Tebello
- Date: 2014
- Language: English
- Type: Article
- Identifier: vital:7304 , http://hdl.handle.net/10962/d1020381
- Description: Lead (II) pyridyloxyphthalocyanine (PbTpyPc) and its quaternized form (PbTepyPc) were synthesized and the photophysical behavior examined. Low fluorescence quantum yields (ΦF) of 0.01 and 0.02 were observed for PbTepyPc and PbTpyPc, respectively. The singlet oxygen quantum yields (ΦΔ) were 0.60 and 0.68, for PbTepyPc and PbTpyPc, respectively using DPBF as a quencher in DMF. Singlet oxygen production of the embedded sensitizers in electrospun fiber were quantified using ADMA and were found to be ΦΔ = 0.41 and ΦΔ = 0.21 for PbTepyPc and PbTpyPc, respectively. Photodynamic inactivation of Escherichia coli (E. coli) with the quaternized photosensitizer at 5 μM, totally inactivated the E. coli (with log CFU = 10 decrease). Only 0.4 log CFU decrease was obtained with PbTpyPc. The embedded non-quaternized photosensitizer (PbTpyPc) was less active on the gram negative bacteria but the quaternized photosensitizer (PbTepyPc) was effective towards inactivation of E. coli. , Original publication is available at http://dx.doi.org/10.1016/j.dyepig.2014.05.010
- Full Text: false
- Date Issued: 2014
- Authors: Osifeko, Olawale L , Nyokong, Tebello
- Date: 2014
- Language: English
- Type: Article
- Identifier: vital:7304 , http://hdl.handle.net/10962/d1020381
- Description: Lead (II) pyridyloxyphthalocyanine (PbTpyPc) and its quaternized form (PbTepyPc) were synthesized and the photophysical behavior examined. Low fluorescence quantum yields (ΦF) of 0.01 and 0.02 were observed for PbTepyPc and PbTpyPc, respectively. The singlet oxygen quantum yields (ΦΔ) were 0.60 and 0.68, for PbTepyPc and PbTpyPc, respectively using DPBF as a quencher in DMF. Singlet oxygen production of the embedded sensitizers in electrospun fiber were quantified using ADMA and were found to be ΦΔ = 0.41 and ΦΔ = 0.21 for PbTepyPc and PbTpyPc, respectively. Photodynamic inactivation of Escherichia coli (E. coli) with the quaternized photosensitizer at 5 μM, totally inactivated the E. coli (with log CFU = 10 decrease). Only 0.4 log CFU decrease was obtained with PbTpyPc. The embedded non-quaternized photosensitizer (PbTpyPc) was less active on the gram negative bacteria but the quaternized photosensitizer (PbTepyPc) was effective towards inactivation of E. coli. , Original publication is available at http://dx.doi.org/10.1016/j.dyepig.2014.05.010
- Full Text: false
- Date Issued: 2014
Training of teachers in multigrade teaching: integration of vertical and horizontal knowledge in post -training
- Authors: Ganqa, Ncumisa Hazel
- Date: 2014
- Subjects: Combination of grades -- Cross-cultural studies Teachers -- In-service training Teachers
- Language: English
- Type: Thesis , Doctoral , PhD (Education)
- Identifier: http://hdl.handle.net/10353/6158 , vital:29496
- Description: The purpose of this study was to examine the training and development of teachers in multi-grade teaching in selected Eastern Cape primary schools with a particular focus on the integration of vertical and horizontal knowledge in post-training. Multigrade teaching is the combining of learners of different grade levels in one classroom taught by one teacher. To gain better understanding of the construct of vertical and horizontal integration of knowledge within post-training environment, this qualitative case study design sampled eight teachers, four school principals and three trainers, purposively. In order to evaluate the training and development provided for teachers in multi-grade classrooms the researcher examined the training programmes, the training curriculum and transfer of training inputs. The results of the study indicate that post-training is the determinant of the extent of the effectiveness of the transfer of training skills, knowledge and attitudes gained in multi-grade teaching training. The study found a massive gap that currently exists between training in multi-grade teaching and the actual transferability of such training in multi-grade contexts. Positive transfer of training in multi-grade teaching strategies was found to be skills related to teaching strategies, lesson management, curriculum integration and social components of multi-grade teaching. Negative transfer of training included classroom organisation, lesson planning, timetabling, curriculum adaptation and assessment. Although multi-grade teacher training programme is assumed to change behaviours, attitudes, impart knowledge and improve teaching skills, the results of the study indicate that training inputs might not necessarily transform into classroom practice. In order to facilitate and ensure vertical and horizontal integration of knowledge and skills and transfer of training to classroombased teaching, recurrent training in multi-grade teaching is therefore, suggested.
- Full Text:
- Date Issued: 2014
- Authors: Ganqa, Ncumisa Hazel
- Date: 2014
- Subjects: Combination of grades -- Cross-cultural studies Teachers -- In-service training Teachers
- Language: English
- Type: Thesis , Doctoral , PhD (Education)
- Identifier: http://hdl.handle.net/10353/6158 , vital:29496
- Description: The purpose of this study was to examine the training and development of teachers in multi-grade teaching in selected Eastern Cape primary schools with a particular focus on the integration of vertical and horizontal knowledge in post-training. Multigrade teaching is the combining of learners of different grade levels in one classroom taught by one teacher. To gain better understanding of the construct of vertical and horizontal integration of knowledge within post-training environment, this qualitative case study design sampled eight teachers, four school principals and three trainers, purposively. In order to evaluate the training and development provided for teachers in multi-grade classrooms the researcher examined the training programmes, the training curriculum and transfer of training inputs. The results of the study indicate that post-training is the determinant of the extent of the effectiveness of the transfer of training skills, knowledge and attitudes gained in multi-grade teaching training. The study found a massive gap that currently exists between training in multi-grade teaching and the actual transferability of such training in multi-grade contexts. Positive transfer of training in multi-grade teaching strategies was found to be skills related to teaching strategies, lesson management, curriculum integration and social components of multi-grade teaching. Negative transfer of training included classroom organisation, lesson planning, timetabling, curriculum adaptation and assessment. Although multi-grade teacher training programme is assumed to change behaviours, attitudes, impart knowledge and improve teaching skills, the results of the study indicate that training inputs might not necessarily transform into classroom practice. In order to facilitate and ensure vertical and horizontal integration of knowledge and skills and transfer of training to classroombased teaching, recurrent training in multi-grade teaching is therefore, suggested.
- Full Text:
- Date Issued: 2014
Examining the nature of the relationship between learners' conceptual understanding and their mathematical dispositions in the context of multiplication
- Authors: Ndongeni, Siviwe Lungelwa
- Date: 2014
- Subjects: Multiplication -- Study and teaching (Elementary) -- South Africa , Mathematics -- Study and teaching (Elementary) -- South Africa , Problem solving in children , Multiplication -- Ability testing
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1987 , http://hdl.handle.net/10962/d1013217
- Description: The focus of this study is to explore three key aspects of learners’ multiplicative proficiency: the nature of learners’ conceptual understanding of multiplication, the nature of learners’ numeracy dispositions (in the context of learning multiplication), and the relationship between conceptual understanding and productive dispositions in the context of multiplication. The study used a qualitative case study approach to gather rich data in relation to these. In the study a purposively selected sample of six Grade 4 learners was used from the same school: two high, two average, and two low performers. Kilpatrick, Swafford, and Findell (2001) define conceptual understanding as a functional grasp of mathematical ideas and its significant indicator is being able to represent mathematical situations in different ways and knowing how different representations can be useful for different purposes. They then refer to productive disposition as the ‘tendency to see sense in mathematics, to perceive it as both useful and worthwhile, to believe that steady effort in learning mathematics pays off, and to see oneself as an effective learner and doer of mathematics’ (p.131). Individual interviews were conducted using Wright, et al.’s (2006) instrument for exploring the nature of students’ conceptual understanding of multiplication. Wright, et al. (2006) argue that the topics of multiplication and division build on the students’ knowledge of addition and subtraction, and also multiplication and division provide foundational knowledge for topics such as fractions, ratios, proportion and percentage, all of which are core and essential areas of mathematical learning typically addressed in the primary or elementary grades. Researchers agree that learners have to be exposed to various strategies so that they are able to see that there is a difference between additive reasoning and multiplicative reasoning. In order to classify learners’ conceptual understanding of multiplication an analysis of the data was done and learners were allocated levels according to the Wright, et al. (2006) levels of achievement. For the classification of learner dispositions, the data was analysed in terms of the elements of productive disposition as defined by Kilpatrick, et al. (2001) and Carr and Claxton (2002). The key findings of the study indicate that for conceptual understanding most of the learners depended on using concrete materials in solving multiplication and they also used basic strategies and methods. The findings for productive dispositions were that most of the learners saw themselves as competent in doing multiplication but the aspect of sense making and steady effort was less developed. The findings for the relationship between conceptual understanding and productive disposition were that both strands have a mutual relationship in which one helped the other to develop.
- Full Text:
- Date Issued: 2014
- Authors: Ndongeni, Siviwe Lungelwa
- Date: 2014
- Subjects: Multiplication -- Study and teaching (Elementary) -- South Africa , Mathematics -- Study and teaching (Elementary) -- South Africa , Problem solving in children , Multiplication -- Ability testing
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1987 , http://hdl.handle.net/10962/d1013217
- Description: The focus of this study is to explore three key aspects of learners’ multiplicative proficiency: the nature of learners’ conceptual understanding of multiplication, the nature of learners’ numeracy dispositions (in the context of learning multiplication), and the relationship between conceptual understanding and productive dispositions in the context of multiplication. The study used a qualitative case study approach to gather rich data in relation to these. In the study a purposively selected sample of six Grade 4 learners was used from the same school: two high, two average, and two low performers. Kilpatrick, Swafford, and Findell (2001) define conceptual understanding as a functional grasp of mathematical ideas and its significant indicator is being able to represent mathematical situations in different ways and knowing how different representations can be useful for different purposes. They then refer to productive disposition as the ‘tendency to see sense in mathematics, to perceive it as both useful and worthwhile, to believe that steady effort in learning mathematics pays off, and to see oneself as an effective learner and doer of mathematics’ (p.131). Individual interviews were conducted using Wright, et al.’s (2006) instrument for exploring the nature of students’ conceptual understanding of multiplication. Wright, et al. (2006) argue that the topics of multiplication and division build on the students’ knowledge of addition and subtraction, and also multiplication and division provide foundational knowledge for topics such as fractions, ratios, proportion and percentage, all of which are core and essential areas of mathematical learning typically addressed in the primary or elementary grades. Researchers agree that learners have to be exposed to various strategies so that they are able to see that there is a difference between additive reasoning and multiplicative reasoning. In order to classify learners’ conceptual understanding of multiplication an analysis of the data was done and learners were allocated levels according to the Wright, et al. (2006) levels of achievement. For the classification of learner dispositions, the data was analysed in terms of the elements of productive disposition as defined by Kilpatrick, et al. (2001) and Carr and Claxton (2002). The key findings of the study indicate that for conceptual understanding most of the learners depended on using concrete materials in solving multiplication and they also used basic strategies and methods. The findings for productive dispositions were that most of the learners saw themselves as competent in doing multiplication but the aspect of sense making and steady effort was less developed. The findings for the relationship between conceptual understanding and productive disposition were that both strands have a mutual relationship in which one helped the other to develop.
- Full Text:
- Date Issued: 2014
An evaluation of management information systems in the Department of Social Development, province of the Eastern Cape
- Authors: Ngqungqu, Siphokazi
- Date: 2014
- Subjects: Information resources management -- South Africa -- Eastern Cape , Information storage and retrieval systems -- Management
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:8351 , http://hdl.handle.net/10948/d1020889
- Description: The alignment of information systems with organisational objectives and strategies is crucial to the efficient performance of any organisation. There is a growing focus on the effectiveness of management and evidence-based decision making in public institutions in South Africa. The Eastern Cape Department of Social Development and Special Programmes (ECDSD) implemented a Social Development Information Management System (SDIMS), which is an information system that supports various functions performed by the Department. While SDMIS provides large amounts of valuable information, it still has much ground to cover in terms of fully meeting the Department’s information needs. There is an increasing demand for information to inform decision making with regards to priority setting, resource usage, monitoring the impact of the Department’s intervention programmes, and monitoring the progress of the Department’s strategic goals. The main purpose of this study was to analyse the extent to which MIS is utilised in the Eastern Cape Department of Social Development and Special Programmes and to make recommendations for the alignment of MIS with organisational objectives in order to achieve these objectives. Furthermore, the study intends to investigate the extent to which the information needs of managers are considered in designing and providing information. The objectives of the study are, firstly, to analyse the current state of MIS utilisation in the Department. Secondly, to evaluate the utilisation of information provided by the MIS unit for decision making, and, thirdly, to make recommendations on how to improve MIS utilisation. Qualitative approach techniques were utilised to collect data for the study. Research questionnaires were distributed to thirty respondents. Semi-structured interviews were conducted with seven interviewees out of a target number of ten. The response rate was 68 percent and this was considered as adequate for scientific analysis and reporting. The study produced the following research findings: Mainly, the MIS users believe that they understand MIS and its capabilities, and have received training on how to use the system. The quality of information provided by MIS is mostly complete and largely meets user requirements and expectations. MIS information is for the most part accurate and comprehensive enough to expedite decision-making. Although MIS largely meets user requirements and expectations in terms of completeness, accuracy and reliability, the study indicates that it still falls short in integrating information from other sources, which include government transversal systems such as the Basic Accounting System (BAS) and the Personnel Salary System (PERSAL). MIS information is mostly available and easy to access, but occasionally not timely. This is mostly caused by the unavailability of real-time information synchronisation between MIS and other government systems. In light of the above findings, the researcher recommends that: There is still more to be done in order to continuously inform and train users on the latest MIS capability developments in the form of awareness workshops, contact and remote support, and through internal news bulletins. The Department needs to work with other government entities that are custodians of transversal systems in finding a solution to the creation of real-time integration of MIS with other external sources of information. Even though the level of MIS utilisation is not too much of a concern, the Department needs to ensure that users of information are kept up to date with new MIS reporting capabilities so as not to underutilise the system. It is therefore recommended that the Department ensure that information is more often reviewed and reports are customised to meet the ever-changing needs of the Department.
- Full Text:
- Date Issued: 2014
- Authors: Ngqungqu, Siphokazi
- Date: 2014
- Subjects: Information resources management -- South Africa -- Eastern Cape , Information storage and retrieval systems -- Management
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:8351 , http://hdl.handle.net/10948/d1020889
- Description: The alignment of information systems with organisational objectives and strategies is crucial to the efficient performance of any organisation. There is a growing focus on the effectiveness of management and evidence-based decision making in public institutions in South Africa. The Eastern Cape Department of Social Development and Special Programmes (ECDSD) implemented a Social Development Information Management System (SDIMS), which is an information system that supports various functions performed by the Department. While SDMIS provides large amounts of valuable information, it still has much ground to cover in terms of fully meeting the Department’s information needs. There is an increasing demand for information to inform decision making with regards to priority setting, resource usage, monitoring the impact of the Department’s intervention programmes, and monitoring the progress of the Department’s strategic goals. The main purpose of this study was to analyse the extent to which MIS is utilised in the Eastern Cape Department of Social Development and Special Programmes and to make recommendations for the alignment of MIS with organisational objectives in order to achieve these objectives. Furthermore, the study intends to investigate the extent to which the information needs of managers are considered in designing and providing information. The objectives of the study are, firstly, to analyse the current state of MIS utilisation in the Department. Secondly, to evaluate the utilisation of information provided by the MIS unit for decision making, and, thirdly, to make recommendations on how to improve MIS utilisation. Qualitative approach techniques were utilised to collect data for the study. Research questionnaires were distributed to thirty respondents. Semi-structured interviews were conducted with seven interviewees out of a target number of ten. The response rate was 68 percent and this was considered as adequate for scientific analysis and reporting. The study produced the following research findings: Mainly, the MIS users believe that they understand MIS and its capabilities, and have received training on how to use the system. The quality of information provided by MIS is mostly complete and largely meets user requirements and expectations. MIS information is for the most part accurate and comprehensive enough to expedite decision-making. Although MIS largely meets user requirements and expectations in terms of completeness, accuracy and reliability, the study indicates that it still falls short in integrating information from other sources, which include government transversal systems such as the Basic Accounting System (BAS) and the Personnel Salary System (PERSAL). MIS information is mostly available and easy to access, but occasionally not timely. This is mostly caused by the unavailability of real-time information synchronisation between MIS and other government systems. In light of the above findings, the researcher recommends that: There is still more to be done in order to continuously inform and train users on the latest MIS capability developments in the form of awareness workshops, contact and remote support, and through internal news bulletins. The Department needs to work with other government entities that are custodians of transversal systems in finding a solution to the creation of real-time integration of MIS with other external sources of information. Even though the level of MIS utilisation is not too much of a concern, the Department needs to ensure that users of information are kept up to date with new MIS reporting capabilities so as not to underutilise the system. It is therefore recommended that the Department ensure that information is more often reviewed and reports are customised to meet the ever-changing needs of the Department.
- Full Text:
- Date Issued: 2014
Effect of diet and sex-sorting on growth and gonad development in farmed South African abalone, Haliotis midae
- Authors: Ayres, Devin William Philip
- Date: 2014
- Subjects: Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- South Africa -- Growth , Abalones -- Feeding and feeds -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5357 , http://hdl.handle.net/10962/d1010856 , Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- South Africa -- Growth , Abalones -- Feeding and feeds -- South Africa
- Description: Abalone, Haliotis midae, farmers in South Africa that feed formulated diets reported a periodic drop in abalone growth during periods of increased gonad development. A large drop in abalone biomass was noticed after presumed spawning events. This study was aimed to determine the effect of diet and sex-sorting on gonad development in abalone. Experiments were conducted on a commercial abalone farm from July 2012 to the end of June 2013. Isonitrogenous and isoenergetic diets were formulated with two protein sources. A fishmeal and soybean meal (S-diet) diet and a fishmeal only (F-diet) diet were fed to abalone (50 - 70 g abalone⁻¹) over 12 months. Weight and length gain, gonad bulk index (GBI), visceral index (%) and meat mass index (%) were determined monthly and seasonally. A histological study on the female gonads was conducted. This study also included an experiment to test the effect of sex-sorting (70 - 80 g abalone⁻¹) on growth and body composition with treatments including males (M), females (F) and equal numbers of males and females (MF). Weight gain and length gain were faster in S-diet-fed abalone (RM-ANOVA, F ₍₁, ₁₆₎ = 7.77, p = 0.01; F ₍₁, ₆₉₎ = 49.9, p < 0.001, respectively). Gonad development was significantly affected by the inclusion of soybean meal with S-diet-fed abalone showing higher GBI-values than F-diet-fed abalone (RM-ANOVA, F ₍₁, ₃₃)= 16.22, p = 0.0003). Male abalone had higher GBI-values than females (RM-ANOVA, F ₍₁, ₃₃₎ = 39.87, p < 0.0001). There was no significant difference in average feed conversion ratio (FCR) between diets over time (RM-ANOVA, F ₍₁, ₂₁₎ = 0.008, p = 0.97). However, average FCR-values were significantly highest between November 2012 and March 2013, the presumed spawning season. The visceral mass (gut and gonad) as a proportion of whole mass (visceral index, %) was significantly higher in abalone fed the S-diet (RM-ANOVA; F ₍₁, ₆₉₎ = 68.06, p < 0.0001). There was no difference in meat mass index (%) between diets for both male and female abalone (RM-ANOVA; F ₍₇, ₂₄₈₎ = 0.80, p = 0.60; F ₍₇, ₂₄₁₎ = 1.7, p = 0.11,respectively). Meat mass index significantly decreased from September 2012 to February 2013 coinciding with the period of high GBI-values. The distribution of oocyte maturity stages differed between diets. The majority of oocytes within S-diet-fed abalone were fully mature stage 8 oocytes compared to a majority of stage 7 oocytes in F-diet-fed abalone. Histology corroborated peaks in GBI-values for abalone fed both diets. There was no significant difference in growth, GBI, visceral index (%) and meat mass index (%) between abalone sorted into monosex and mixed-sex populations. Thus, the presence of the opposite sex did not have an effect on growth and gonad mass in H. midae. The phytoestrogens daidzin, glycitin, genistin, daidzein, glycitein and genistein were present in soybean meal and only traceable amounts were found in the F-diet. This study provided evidence that soybean meal present in formulated feed affected growth and gonad development in H.midae. The difference in the distribution of the maturity stages of oocytes was affected by diet. Sex-sorting abalone into monosex and mixed-sex populations had no influence on weight and length gain and gonad development.
- Full Text:
- Date Issued: 2014
- Authors: Ayres, Devin William Philip
- Date: 2014
- Subjects: Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- South Africa -- Growth , Abalones -- Feeding and feeds -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5357 , http://hdl.handle.net/10962/d1010856 , Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- South Africa -- Growth , Abalones -- Feeding and feeds -- South Africa
- Description: Abalone, Haliotis midae, farmers in South Africa that feed formulated diets reported a periodic drop in abalone growth during periods of increased gonad development. A large drop in abalone biomass was noticed after presumed spawning events. This study was aimed to determine the effect of diet and sex-sorting on gonad development in abalone. Experiments were conducted on a commercial abalone farm from July 2012 to the end of June 2013. Isonitrogenous and isoenergetic diets were formulated with two protein sources. A fishmeal and soybean meal (S-diet) diet and a fishmeal only (F-diet) diet were fed to abalone (50 - 70 g abalone⁻¹) over 12 months. Weight and length gain, gonad bulk index (GBI), visceral index (%) and meat mass index (%) were determined monthly and seasonally. A histological study on the female gonads was conducted. This study also included an experiment to test the effect of sex-sorting (70 - 80 g abalone⁻¹) on growth and body composition with treatments including males (M), females (F) and equal numbers of males and females (MF). Weight gain and length gain were faster in S-diet-fed abalone (RM-ANOVA, F ₍₁, ₁₆₎ = 7.77, p = 0.01; F ₍₁, ₆₉₎ = 49.9, p < 0.001, respectively). Gonad development was significantly affected by the inclusion of soybean meal with S-diet-fed abalone showing higher GBI-values than F-diet-fed abalone (RM-ANOVA, F ₍₁, ₃₃)= 16.22, p = 0.0003). Male abalone had higher GBI-values than females (RM-ANOVA, F ₍₁, ₃₃₎ = 39.87, p < 0.0001). There was no significant difference in average feed conversion ratio (FCR) between diets over time (RM-ANOVA, F ₍₁, ₂₁₎ = 0.008, p = 0.97). However, average FCR-values were significantly highest between November 2012 and March 2013, the presumed spawning season. The visceral mass (gut and gonad) as a proportion of whole mass (visceral index, %) was significantly higher in abalone fed the S-diet (RM-ANOVA; F ₍₁, ₆₉₎ = 68.06, p < 0.0001). There was no difference in meat mass index (%) between diets for both male and female abalone (RM-ANOVA; F ₍₇, ₂₄₈₎ = 0.80, p = 0.60; F ₍₇, ₂₄₁₎ = 1.7, p = 0.11,respectively). Meat mass index significantly decreased from September 2012 to February 2013 coinciding with the period of high GBI-values. The distribution of oocyte maturity stages differed between diets. The majority of oocytes within S-diet-fed abalone were fully mature stage 8 oocytes compared to a majority of stage 7 oocytes in F-diet-fed abalone. Histology corroborated peaks in GBI-values for abalone fed both diets. There was no significant difference in growth, GBI, visceral index (%) and meat mass index (%) between abalone sorted into monosex and mixed-sex populations. Thus, the presence of the opposite sex did not have an effect on growth and gonad mass in H. midae. The phytoestrogens daidzin, glycitin, genistin, daidzein, glycitein and genistein were present in soybean meal and only traceable amounts were found in the F-diet. This study provided evidence that soybean meal present in formulated feed affected growth and gonad development in H.midae. The difference in the distribution of the maturity stages of oocytes was affected by diet. Sex-sorting abalone into monosex and mixed-sex populations had no influence on weight and length gain and gonad development.
- Full Text:
- Date Issued: 2014