Ndiyoyika
- Authors: Nyezwa, Mxolisi
- Date: 2016
- Language: English , Xhosa
- Type: Thesis , Masters , MA
- Identifier: vital:6021 , http://hdl.handle.net/10962/d1021245
- Description: This thesis collection is a book of isiXhosa poems in three sections: - Poems derived and influenced by the rhythmic structure and the lyrics of Maskandi music - More introspective and personal poems derived from other influences: International poetry, South African poetry, and certain jazz and soul music - A major poem titled, “Nozala, umqolo wakho uphandle” which delves into the state of South Africa and explores the relationships that entrench poverty and powerlessness in post-apartheid South Africa. , Le thisisi yingqokelela yemibongo yesiXhosa eyohlulwe yazizigaba ezintathu: - Imibongo ephenjelelwe ziingoma nezingqi zomculo kaMaskandi - Imibongo ephenjelelwe zizimvo neemvakalelo zam njengombhali, ngakumbi iintshukumo zomzimba nezomphefumlo ezithundezwe ziimbongi zamazwe omhlaba, ezoMzantsi Afrika, kunye nemiculo efana ne-jazz, ne-soul - Umbongo ombaxa osihloko sithi, “Nozala, umqolo wakho uphandle” othetha ngelizwe lethu iMzantsi Afrika, uqwalasela indlela ekuphethwe ngayo ilizwe ziziphathamandla, nendlela abasemagunyeni abaphembelela ngayo intswela-ngqesho nentlupheko eluntwini, kwanokufiphala kobutsha-ntliziyo nobuthanda-zwe kubemi beli lizwe.
- Full Text:
- Date Issued: 2016
- Authors: Nyezwa, Mxolisi
- Date: 2016
- Language: English , Xhosa
- Type: Thesis , Masters , MA
- Identifier: vital:6021 , http://hdl.handle.net/10962/d1021245
- Description: This thesis collection is a book of isiXhosa poems in three sections: - Poems derived and influenced by the rhythmic structure and the lyrics of Maskandi music - More introspective and personal poems derived from other influences: International poetry, South African poetry, and certain jazz and soul music - A major poem titled, “Nozala, umqolo wakho uphandle” which delves into the state of South Africa and explores the relationships that entrench poverty and powerlessness in post-apartheid South Africa. , Le thisisi yingqokelela yemibongo yesiXhosa eyohlulwe yazizigaba ezintathu: - Imibongo ephenjelelwe ziingoma nezingqi zomculo kaMaskandi - Imibongo ephenjelelwe zizimvo neemvakalelo zam njengombhali, ngakumbi iintshukumo zomzimba nezomphefumlo ezithundezwe ziimbongi zamazwe omhlaba, ezoMzantsi Afrika, kunye nemiculo efana ne-jazz, ne-soul - Umbongo ombaxa osihloko sithi, “Nozala, umqolo wakho uphandle” othetha ngelizwe lethu iMzantsi Afrika, uqwalasela indlela ekuphethwe ngayo ilizwe ziziphathamandla, nendlela abasemagunyeni abaphembelela ngayo intswela-ngqesho nentlupheko eluntwini, kwanokufiphala kobutsha-ntliziyo nobuthanda-zwe kubemi beli lizwe.
- Full Text:
- Date Issued: 2016
New evidence for the correlation of basalts of the Suurberg Group with the upper part of the Karoo basalt sequence of Lesotho:
- Authors: Marsh, Julian S
- Date: 2016
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/145122 , vital:38410 , ISBN 9783319408590 , https://link.springer.com/chapter/10.1007/978-3-319-40859-0_6
- Description: Tholeiitic basalts build the Mimosa Formation, the uppermost stratigraphic unit of the Suurberg Group in the northern part of the Algoa Basin. Exposures are very poor and the tectonic significance of the Suurberg rocks and the origin of the Mimosa basalts are contentious. Drilling of stratigraphic boreholes at four localities allowed detailed sampling of the basalts from two cores 90 km apart for geochemical, age and palaeomagnetic investigations.
- Full Text:
- Date Issued: 2016
- Authors: Marsh, Julian S
- Date: 2016
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/145122 , vital:38410 , ISBN 9783319408590 , https://link.springer.com/chapter/10.1007/978-3-319-40859-0_6
- Description: Tholeiitic basalts build the Mimosa Formation, the uppermost stratigraphic unit of the Suurberg Group in the northern part of the Algoa Basin. Exposures are very poor and the tectonic significance of the Suurberg rocks and the origin of the Mimosa basalts are contentious. Drilling of stratigraphic boreholes at four localities allowed detailed sampling of the basalts from two cores 90 km apart for geochemical, age and palaeomagnetic investigations.
- Full Text:
- Date Issued: 2016
Nitrogen fertilisation improves growth of Chromolaena odorata (Asteraceae) and the performance of the biological control agent, Pareuchaetes insulata (Erebidae)
- Uyi, Osariyekemwen O, Zacharariades, Costas, Hill, Martin P
- Authors: Uyi, Osariyekemwen O , Zacharariades, Costas , Hill, Martin P
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/416880 , vital:71393 , xlink:href="https://doi.org/10.1080/09583157.2015.1118615"
- Description: Recent studies have demonstrated, through their contrasting results, that relationships between nitrogen levels in host plants and phytophagous insect performance are not simple. This study examined the effect of varying fertilisation regimes on the invasive alien plant, Chromolaena odorata (L.) (Asteraceae) and the response of a specialist folivore (a biological control agent), Pareuchaetes insulata (Walker) (Lepidoptera: Erebidae). C. odorata plants were treated with 3 different levels of fertilisation and plant characteristics were measured within 2–3 months of fertiliser application. Leaves from each of the three treatments were fed to newly hatched larvae until pupation in order to determine the effect of nitrogen fertilisation on herbivore performance metrics such as survival, development time, fecundity and longevity. High and medium fertilisation significantly increased foliar nitrogen concentrations, basal stem diameter, leaf length, shoot height and above-ground biomass of C. odorata plants relative to low fertilisation. When individuals of P. insulata were fed on leaves from medium- or high-fertilisation treatments, they developed faster, grew to a larger size (by 8%) and achieved higher fecundity (19–22%) than leaves from the low-fertilisation treatment. The results suggest that in mass-rearing, increased production of this biological control agent will occur in high- or medium-fertilised plants.
- Full Text:
- Date Issued: 2016
- Authors: Uyi, Osariyekemwen O , Zacharariades, Costas , Hill, Martin P
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/416880 , vital:71393 , xlink:href="https://doi.org/10.1080/09583157.2015.1118615"
- Description: Recent studies have demonstrated, through their contrasting results, that relationships between nitrogen levels in host plants and phytophagous insect performance are not simple. This study examined the effect of varying fertilisation regimes on the invasive alien plant, Chromolaena odorata (L.) (Asteraceae) and the response of a specialist folivore (a biological control agent), Pareuchaetes insulata (Walker) (Lepidoptera: Erebidae). C. odorata plants were treated with 3 different levels of fertilisation and plant characteristics were measured within 2–3 months of fertiliser application. Leaves from each of the three treatments were fed to newly hatched larvae until pupation in order to determine the effect of nitrogen fertilisation on herbivore performance metrics such as survival, development time, fecundity and longevity. High and medium fertilisation significantly increased foliar nitrogen concentrations, basal stem diameter, leaf length, shoot height and above-ground biomass of C. odorata plants relative to low fertilisation. When individuals of P. insulata were fed on leaves from medium- or high-fertilisation treatments, they developed faster, grew to a larger size (by 8%) and achieved higher fecundity (19–22%) than leaves from the low-fertilisation treatment. The results suggest that in mass-rearing, increased production of this biological control agent will occur in high- or medium-fertilised plants.
- Full Text:
- Date Issued: 2016
NMMU students' perceptions of their creativity
- Authors: Rogers, Angela Louise
- Date: 2016
- Subjects: Creative ability in business , Creative thinking , Educational innovations
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/8037 , vital:24478
- Description: Creativity is seen as the driving force behind innovation. It can even be said to be the same process. It is critical to implement the creativity in order for innovation to actually take place. This combination of creativity and innovation is required for economic growth, sustainability, continuous improvement and competitive edge for organisations. Creativity is more than just artistic ability but includes scientific and problem solving steps and basic everyday creativity. This combination would be key in government departments, organisations and universities today. People’s perception on creativity could hamper their growth and development in this key area, not only for themselves but of others that they come into contact with. People’s perception on creativity is that it is either a genius form in either artistic or musical terms or it is not at all creative. They do not necessarily view the everyday tasks as creative. The research approach for this study is positivistic and deductive. The students’ perception of creativity is gathered using a quantitative questionnaire, where they rank their perceptions. The questionnaire was from an international study and it was made available to all students at the Nelson Mandela Metropolitan University. The data analysis will be both descriptive and inferential in nature. The research seeks to examine students’ perception of their own creativity and how they rate various creative products or services. Students are on their way to the pinnacle in their fields and the creativity should therefore be at its peak to be able to take full advantage and to get maximum benefit from it. The research will gain insight into their perception via a questionnaire where they need to rate themselves. The literature review will investigate creativity, innovation and the links between them. It will analyse the importance of innovation to business and the unlocking of creativity. There are many differing ways to unlock and stimulate creativity and some of these are addressed.
- Full Text:
- Date Issued: 2016
- Authors: Rogers, Angela Louise
- Date: 2016
- Subjects: Creative ability in business , Creative thinking , Educational innovations
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/8037 , vital:24478
- Description: Creativity is seen as the driving force behind innovation. It can even be said to be the same process. It is critical to implement the creativity in order for innovation to actually take place. This combination of creativity and innovation is required for economic growth, sustainability, continuous improvement and competitive edge for organisations. Creativity is more than just artistic ability but includes scientific and problem solving steps and basic everyday creativity. This combination would be key in government departments, organisations and universities today. People’s perception on creativity could hamper their growth and development in this key area, not only for themselves but of others that they come into contact with. People’s perception on creativity is that it is either a genius form in either artistic or musical terms or it is not at all creative. They do not necessarily view the everyday tasks as creative. The research approach for this study is positivistic and deductive. The students’ perception of creativity is gathered using a quantitative questionnaire, where they rank their perceptions. The questionnaire was from an international study and it was made available to all students at the Nelson Mandela Metropolitan University. The data analysis will be both descriptive and inferential in nature. The research seeks to examine students’ perception of their own creativity and how they rate various creative products or services. Students are on their way to the pinnacle in their fields and the creativity should therefore be at its peak to be able to take full advantage and to get maximum benefit from it. The research will gain insight into their perception via a questionnaire where they need to rate themselves. The literature review will investigate creativity, innovation and the links between them. It will analyse the importance of innovation to business and the unlocking of creativity. There are many differing ways to unlock and stimulate creativity and some of these are addressed.
- Full Text:
- Date Issued: 2016
Nonlinear optical behavior of alkyne terminated phthalocyanines in solution and when embedded in polysulfone as thin films: effects of aggregation
- Bankole, Owolabi M, Yilmaz, Yusuf, Nyokong, Tebello
- Authors: Bankole, Owolabi M , Yilmaz, Yusuf , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189110 , vital:44817 , xlink:href="https://doi.org/10.1016/j.optmat.2015.11.041"
- Description: We report here for the first time, on the comparative studies of the photophysical and optical limiting behavior of our two novel phthalocyanines namely 2(3), 9(10), 16(17), 23(24)-tetrakis-(4-(5-methylhex-1-yn-3-yloxy)) phthalocyanines 2, and 2(3), 9(10), 16(17), 23(24)-tetrakis-(4-(5-methylhex-1-yn-3-yloxy)) phthalocyaninato zinc (II) (3) in solution and thin films. Nonlinear optical (NLO) properties of the samples in solution and contained in polysulfone (PSU) thin films were evaluated using Z-scan technique at 532 nm and 10 ns pulsed duration. Effects of aggregation and disaggregation on the NLO performance of metal-free phthalocyanine are reported in detail. Our findings showed that the prepared Pcs show larger nonlinear absorption coefficient and lower limiting thresholds when embedded in polysulfone films compared to in solutions. The values of nonlinear susceptibility and hyperpolarizability recorded for 3-PSU in this work are respectively, ∼2.09 × 10−8 esu and ∼1.02 × 10−26 esu. These values are among the largest values reported for phthalocyanines and other macrocycles doped on polymer matrices.
- Full Text:
- Date Issued: 2016
- Authors: Bankole, Owolabi M , Yilmaz, Yusuf , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189110 , vital:44817 , xlink:href="https://doi.org/10.1016/j.optmat.2015.11.041"
- Description: We report here for the first time, on the comparative studies of the photophysical and optical limiting behavior of our two novel phthalocyanines namely 2(3), 9(10), 16(17), 23(24)-tetrakis-(4-(5-methylhex-1-yn-3-yloxy)) phthalocyanines 2, and 2(3), 9(10), 16(17), 23(24)-tetrakis-(4-(5-methylhex-1-yn-3-yloxy)) phthalocyaninato zinc (II) (3) in solution and thin films. Nonlinear optical (NLO) properties of the samples in solution and contained in polysulfone (PSU) thin films were evaluated using Z-scan technique at 532 nm and 10 ns pulsed duration. Effects of aggregation and disaggregation on the NLO performance of metal-free phthalocyanine are reported in detail. Our findings showed that the prepared Pcs show larger nonlinear absorption coefficient and lower limiting thresholds when embedded in polysulfone films compared to in solutions. The values of nonlinear susceptibility and hyperpolarizability recorded for 3-PSU in this work are respectively, ∼2.09 × 10−8 esu and ∼1.02 × 10−26 esu. These values are among the largest values reported for phthalocyanines and other macrocycles doped on polymer matrices.
- Full Text:
- Date Issued: 2016
Nonlinear optical behavior of neodymium mono-and bi-nuclear phthalocyanines linked to zinc oxide nanoparticles and incorporated into poly acrylic acid
- Sekhosana, Kutloano E, Amuhaya, Edith K, Nyokong, Tebello
- Authors: Sekhosana, Kutloano E , Amuhaya, Edith K , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/188766 , vital:44783 , xlink:href="https://doi.org/10.1016/j.poly.2015.12.045"
- Description: Syntheses of bis{23-(3,4-di-yloxybenzoic acid)-(2(3), 9(10), 16(17), 23(24))-(hexakis-pyridin-3-yloxy phthalocyaninato)} dineodymium (III) acetate (3) and 2(3), 9(10), 16(17), 23(24)-(tetrapyridin-3-yloxy phthalocyaninato) neodymium (III) acetate (4) as well as their conjugates with ZnO nanoparticles (conjugates 6, 7 and 8) are presented. Thin films of conjugate 6 (where complex 3 is linked to ZnO nanoparticles via an amide bond) gave the best third-order susceptibility (5.89 × 10−8 esu), second-order hyperpolarizability (2.53 × 10−25 esu) and the lowest limiting threshold values (0.12 J cm−2). The nonlinear behavior is enhanced in solid state when compared to solution.
- Full Text:
- Date Issued: 2016
- Authors: Sekhosana, Kutloano E , Amuhaya, Edith K , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/188766 , vital:44783 , xlink:href="https://doi.org/10.1016/j.poly.2015.12.045"
- Description: Syntheses of bis{23-(3,4-di-yloxybenzoic acid)-(2(3), 9(10), 16(17), 23(24))-(hexakis-pyridin-3-yloxy phthalocyaninato)} dineodymium (III) acetate (3) and 2(3), 9(10), 16(17), 23(24)-(tetrapyridin-3-yloxy phthalocyaninato) neodymium (III) acetate (4) as well as their conjugates with ZnO nanoparticles (conjugates 6, 7 and 8) are presented. Thin films of conjugate 6 (where complex 3 is linked to ZnO nanoparticles via an amide bond) gave the best third-order susceptibility (5.89 × 10−8 esu), second-order hyperpolarizability (2.53 × 10−25 esu) and the lowest limiting threshold values (0.12 J cm−2). The nonlinear behavior is enhanced in solid state when compared to solution.
- Full Text:
- Date Issued: 2016
Nonlinear optical response of a low symmetry phthalocyanine in the presence of gold nanoparticles when in solution or embedded in poly acrylic acid polymer thin films
- Bankole, Owolabi M, Nyokong, Tebello
- Authors: Bankole, Owolabi M , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/188719 , vital:44779 , xlink:href="https://doi.org/10.1016/j.jphotochem.2015.12.014"
- Description: In this article, we explored the photophysical and nonlinear optical (NLO) characterizations of low symmetry phthalocyanine (ZnPc-NH2) covalently linked to MPA-capped AuNPs (ZnPc-NH2-AuNPs) and poly acrylic acid (ZnPc-NH2-PAA). Nonlinear optical (NLO) properties of the samples were evaluated using Z-scan technique at 532 nm and 10 ns pulsed duration. We observed enhanced photophysical and nonlinear optical behaviour for the ZnPc-NH2 in presence of AuNPs. By virtue of the magnitude of absorption coefficients and other NLO optical parameters estimated in this work, ZnPc-NH2-AuNPs was found to exhibit improved nonlinear optical response compared to the ZnPc-NH2 and ZnPc-NH2-PAA. Both ZnPc-NH2-AuNPs and ZnPc-NH2 doped in PAA possess strong nonlinear absorption coefficients and very low limiting thresholds than when measured in solution.
- Full Text:
- Date Issued: 2016
- Authors: Bankole, Owolabi M , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/188719 , vital:44779 , xlink:href="https://doi.org/10.1016/j.jphotochem.2015.12.014"
- Description: In this article, we explored the photophysical and nonlinear optical (NLO) characterizations of low symmetry phthalocyanine (ZnPc-NH2) covalently linked to MPA-capped AuNPs (ZnPc-NH2-AuNPs) and poly acrylic acid (ZnPc-NH2-PAA). Nonlinear optical (NLO) properties of the samples were evaluated using Z-scan technique at 532 nm and 10 ns pulsed duration. We observed enhanced photophysical and nonlinear optical behaviour for the ZnPc-NH2 in presence of AuNPs. By virtue of the magnitude of absorption coefficients and other NLO optical parameters estimated in this work, ZnPc-NH2-AuNPs was found to exhibit improved nonlinear optical response compared to the ZnPc-NH2 and ZnPc-NH2-PAA. Both ZnPc-NH2-AuNPs and ZnPc-NH2 doped in PAA possess strong nonlinear absorption coefficients and very low limiting thresholds than when measured in solution.
- Full Text:
- Date Issued: 2016
Normative indicators for grade 3 and grade 7 isiXhosa-speaking children on the Bender Visual-Motor Gestalt Test (Second Edition)
- Authors: Palmer, Hanli
- Date: 2016
- Subjects: Bender-Gestalt Test Psychological tests for children
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/6346 , vital:29583
- Description: Selecting appropriate normative data for the purpose of evaluating psychometric test scores forms an integral part of the interpretative psychological assessment process. This highlights the well-known problem of utilising measures developed in the United Kingdom (UK), or the United States (US) and accepting their norms unreservedly for the practice on local populations, which questions the tests’ validity and reliability. The current study, which aimed to collect normative indicators on the Bender Gestalt Test (Second Edition), forms part of the continuing effort to develop norms for psychological tests in South Africa, and to focus on the valid and reliable use of measures within the context of South Africa’s multicultural and multilingual population groups. The participants of the research were Black isiXhosa-speaking Grade 3 and Grade 7 learners aged 8 to 9 years (N = 38 ), and 12 to 13 years (N = 23), obtaining their school education in the disadvantaged educational setting of the former Department of Education and Training (ex-DET) schools. The tests were scored according to the Bender Gestalt Test (Second Edition) manual, using the Global Scoring System. Thereafter, the raw scores were converted to Standard Scores, T-scores and Percentile Ranks using the US normative tables, according to chronological age categories. When the two groups were compared to the US norms, the results equated favourably for the present study sample. There were no significant findings in relation to the classroom size or any difference in performance between the schools who participated. The only significant difference revealed between male and female participants was with the Grade 7 sample group, where the males scored significantly lower than females on the Recall phase. These results support the prospect of the continuous revision of norms, and it is suggesting that the cognitive processes measured by this test are likely to derive from robust neurological substrates that are relatively stable across cultural groups.
- Full Text:
- Date Issued: 2016
- Authors: Palmer, Hanli
- Date: 2016
- Subjects: Bender-Gestalt Test Psychological tests for children
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/6346 , vital:29583
- Description: Selecting appropriate normative data for the purpose of evaluating psychometric test scores forms an integral part of the interpretative psychological assessment process. This highlights the well-known problem of utilising measures developed in the United Kingdom (UK), or the United States (US) and accepting their norms unreservedly for the practice on local populations, which questions the tests’ validity and reliability. The current study, which aimed to collect normative indicators on the Bender Gestalt Test (Second Edition), forms part of the continuing effort to develop norms for psychological tests in South Africa, and to focus on the valid and reliable use of measures within the context of South Africa’s multicultural and multilingual population groups. The participants of the research were Black isiXhosa-speaking Grade 3 and Grade 7 learners aged 8 to 9 years (N = 38 ), and 12 to 13 years (N = 23), obtaining their school education in the disadvantaged educational setting of the former Department of Education and Training (ex-DET) schools. The tests were scored according to the Bender Gestalt Test (Second Edition) manual, using the Global Scoring System. Thereafter, the raw scores were converted to Standard Scores, T-scores and Percentile Ranks using the US normative tables, according to chronological age categories. When the two groups were compared to the US norms, the results equated favourably for the present study sample. There were no significant findings in relation to the classroom size or any difference in performance between the schools who participated. The only significant difference revealed between male and female participants was with the Grade 7 sample group, where the males scored significantly lower than females on the Recall phase. These results support the prospect of the continuous revision of norms, and it is suggesting that the cognitive processes measured by this test are likely to derive from robust neurological substrates that are relatively stable across cultural groups.
- Full Text:
- Date Issued: 2016
Notebook of unremembered poems
- Authors: McKeown, Jean Wallace
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:6013 , http://hdl.handle.net/10962/d1021233
- Description: My poems contain narrative elements and explore themes of identity, motherhood, sexuality, and fear of relinquishing control. Sharon Olds, in her book Stag’s Leap, sums up my intention: “and I saw again how blessed my life has been, / first, to have been able to love, / then, to have the parting now behind me.” My collection chronicles a path towards acceptance of self from childhood onwards, and, more than that, a pleasure and pride in self, and I have tried to find the forms which will reflect this path in the reader’s own experience. Most of the poems are written in a conversational voice and a free-form style which gives me creative licence to explore transition and transformation.
- Full Text:
- Date Issued: 2016
- Authors: McKeown, Jean Wallace
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:6013 , http://hdl.handle.net/10962/d1021233
- Description: My poems contain narrative elements and explore themes of identity, motherhood, sexuality, and fear of relinquishing control. Sharon Olds, in her book Stag’s Leap, sums up my intention: “and I saw again how blessed my life has been, / first, to have been able to love, / then, to have the parting now behind me.” My collection chronicles a path towards acceptance of self from childhood onwards, and, more than that, a pleasure and pride in self, and I have tried to find the forms which will reflect this path in the reader’s own experience. Most of the poems are written in a conversational voice and a free-form style which gives me creative licence to explore transition and transformation.
- Full Text:
- Date Issued: 2016
Observational cosmology with imperfect data
- Authors: Bester, Hertzog Landman
- Date: 2016
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/463 , vital:19961
- Description: We develop a formalism suitable to infer the background geometry of a general spherically symmetric dust universe directly from data on the past lightcone. This direct observational approach makes minimal assumptions about inaccessible parts of the Universe. The non-parametric and Bayesian framework we propose provides a very direct way to test one of the most fundamental underlying assumptions of concordance cosmology viz. the Copernican principle. We present the Copernicus algorithm for this purpose. By applying the algorithm to currently available data, we demonstrate that it is not yet possible to confirm or refute the validity of the Copernican principle within the proposed framework. This is followed by an investigation which aims to determine which future data will best be able to test the Copernican principle. Our results on simulated data suggest that, besides the need to improve the current data, it will be important to identify additional model independent observables for this purpose. The main difficulty with current data is their inability to constrain the value of the cosmological constant. We show how redshift drift data could be used to infer its value with minimal assumptions about the nature of the early Universe. We also discuss some alternative applications of the algorithm.
- Full Text:
- Date Issued: 2016
- Authors: Bester, Hertzog Landman
- Date: 2016
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/463 , vital:19961
- Description: We develop a formalism suitable to infer the background geometry of a general spherically symmetric dust universe directly from data on the past lightcone. This direct observational approach makes minimal assumptions about inaccessible parts of the Universe. The non-parametric and Bayesian framework we propose provides a very direct way to test one of the most fundamental underlying assumptions of concordance cosmology viz. the Copernican principle. We present the Copernicus algorithm for this purpose. By applying the algorithm to currently available data, we demonstrate that it is not yet possible to confirm or refute the validity of the Copernican principle within the proposed framework. This is followed by an investigation which aims to determine which future data will best be able to test the Copernican principle. Our results on simulated data suggest that, besides the need to improve the current data, it will be important to identify additional model independent observables for this purpose. The main difficulty with current data is their inability to constrain the value of the cosmological constant. We show how redshift drift data could be used to infer its value with minimal assumptions about the nature of the early Universe. We also discuss some alternative applications of the algorithm.
- Full Text:
- Date Issued: 2016
Occupational stress and intrinsic motivation as determinants of job engagement in the South African Police Service in Greater Kokstad Municipality
- Authors: Jojo, Avela
- Date: 2016
- Subjects: Police -- Job stress -- South Africa Employee motivation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/1995 , vital:27592
- Description: Occupational stress, intrinsic motivation and job engagement are areas of importance for today’s management. The main objective of this study was to explore the combined effect of occupational stress and intrinsic motivation in determining job engagement in the South African Police Service. Moreover, the study investigated the relationship between occupational stress, intrinsic motivation and job engagement. The study also sought to enquire into the effects rank and gender has on the study variables. A quantitative approach was adopted. A structured self – administered questionnaire comprising of four sections: biographical information, police stress questionnaire, intrinsic motivation inventory and job engagement scale was used to collect data. Statistical Package for the Social Sciences (SPSS) was used to analyse data, and both descriptive and inferential statistics were utilized. The results revealed a negative relationship between occupational stress and job engagement. A positive relationship between intrinsic motivation and job engagement was also found. There was no combined effect of occupational stress and intrinsic motivation on job engagement. Lastly, no significant differences in the way police experience stress were found among rank and gender. The researcher concluded that even when police officers are under great amounts of stress they are still engaged in their jobs. Where levels of intrinsic motivation were high for the police officers, so were the levels of job engagement. Demographic variables did not yield any significant relationships to the study variables. These findings are of significance in creating a police force which is productive and meets the goals and objectives of the South African Police Service.
- Full Text:
- Date Issued: 2016
- Authors: Jojo, Avela
- Date: 2016
- Subjects: Police -- Job stress -- South Africa Employee motivation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/1995 , vital:27592
- Description: Occupational stress, intrinsic motivation and job engagement are areas of importance for today’s management. The main objective of this study was to explore the combined effect of occupational stress and intrinsic motivation in determining job engagement in the South African Police Service. Moreover, the study investigated the relationship between occupational stress, intrinsic motivation and job engagement. The study also sought to enquire into the effects rank and gender has on the study variables. A quantitative approach was adopted. A structured self – administered questionnaire comprising of four sections: biographical information, police stress questionnaire, intrinsic motivation inventory and job engagement scale was used to collect data. Statistical Package for the Social Sciences (SPSS) was used to analyse data, and both descriptive and inferential statistics were utilized. The results revealed a negative relationship between occupational stress and job engagement. A positive relationship between intrinsic motivation and job engagement was also found. There was no combined effect of occupational stress and intrinsic motivation on job engagement. Lastly, no significant differences in the way police experience stress were found among rank and gender. The researcher concluded that even when police officers are under great amounts of stress they are still engaged in their jobs. Where levels of intrinsic motivation were high for the police officers, so were the levels of job engagement. Demographic variables did not yield any significant relationships to the study variables. These findings are of significance in creating a police force which is productive and meets the goals and objectives of the South African Police Service.
- Full Text:
- Date Issued: 2016
On luminescence stimulated from deep traps using thermally-assisted time-resolved optical stimulation in α-Al2O3: C
- Nyirenda, Angel N, Chithambo, Makaiko L, Polymeris, G S
- Authors: Nyirenda, Angel N , Chithambo, Makaiko L , Polymeris, G S
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124627 , vital:35639 , https://doi.org/10.1016/j.radmeas.2016.01.016
- Description: We report a study of charge transfer mechanisms of electrons stimulated optically from very deep traps, also known as donor traps, in α-Al2O3:C. The investigations were carried out using thermally-assisted time-resolved optical stimulation, thermoluminescence and by way of residual thermoluminescence from the main electron trap. When the charges are optically stimulated from the deep traps, they are redistributed via the conduction band to the main electron trap and the shallow trap from where they are optically or thermally released for recombination at luminescence centres. The luminescence is strongly quenched at high measurement temperature as evident by very short luminescence lifetimes at these temperatures. The main peak due to residual thermoluminescence is located at a higher temperature than the conventional main peak.
- Full Text: false
- Date Issued: 2016
- Authors: Nyirenda, Angel N , Chithambo, Makaiko L , Polymeris, G S
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124627 , vital:35639 , https://doi.org/10.1016/j.radmeas.2016.01.016
- Description: We report a study of charge transfer mechanisms of electrons stimulated optically from very deep traps, also known as donor traps, in α-Al2O3:C. The investigations were carried out using thermally-assisted time-resolved optical stimulation, thermoluminescence and by way of residual thermoluminescence from the main electron trap. When the charges are optically stimulated from the deep traps, they are redistributed via the conduction band to the main electron trap and the shallow trap from where they are optically or thermally released for recombination at luminescence centres. The luminescence is strongly quenched at high measurement temperature as evident by very short luminescence lifetimes at these temperatures. The main peak due to residual thermoluminescence is located at a higher temperature than the conventional main peak.
- Full Text: false
- Date Issued: 2016
Oncoming traffic
- Authors: Manaka, Maakomele R
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:6008 , http://hdl.handle.net/10962/1021220
- Description: The poems in my collection Oncoming Traffic mainly look at the silence in my personal conflicts. Fusing different styles and tones of writing from the lyrical to the surreal, these poems grapple with issues I struggle with on a daily basis. First as a man, second as a man with a physical disability, and lastly as a black man dealing with the reality of living in a dysfunctional/disabled society. The silence in my personal conflicts means, writing what I cannot say, stripping myself bare and vulnerable. My inspiration has come from poets who articulate such silences.
- Full Text:
- Date Issued: 2016
- Authors: Manaka, Maakomele R
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:6008 , http://hdl.handle.net/10962/1021220
- Description: The poems in my collection Oncoming Traffic mainly look at the silence in my personal conflicts. Fusing different styles and tones of writing from the lyrical to the surreal, these poems grapple with issues I struggle with on a daily basis. First as a man, second as a man with a physical disability, and lastly as a black man dealing with the reality of living in a dysfunctional/disabled society. The silence in my personal conflicts means, writing what I cannot say, stripping myself bare and vulnerable. My inspiration has come from poets who articulate such silences.
- Full Text:
- Date Issued: 2016
Optical limiting response of multi-walled carbon nanotube-phthalocyanine nanocomposite in solution and when in poly (acrylic acid)
- Sekhosana, Kutloano E, Nyokong, Tebello
- Authors: Sekhosana, Kutloano E , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/188628 , vital:44770 , xlink:href="https://doi.org/10.1016/j.molstruc.2016.03.067"
- Description: Bis{23-(3,4-di-yloxybenzoic acid)-(2(3), 9(10), 16(17), 23(24)-(hexakis-pyridin-3-yloxy phthalocyaninato)} dineodymium (III) acetate (3) is linked to amino-functionalized multi-walled carbon nanotubes (MWCNT) to form 3-MWCNT. Z-scan technique was employed to experimentally determine the nonlinear absorption coefficient from the open-aperture data. The limiting threshold values as low as 0.045 J cm−2 were found in solution. The conjugate (3-MWCNT) gave better optical limiting behavior than complex 3 alone.
- Full Text:
- Date Issued: 2016
- Authors: Sekhosana, Kutloano E , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/188628 , vital:44770 , xlink:href="https://doi.org/10.1016/j.molstruc.2016.03.067"
- Description: Bis{23-(3,4-di-yloxybenzoic acid)-(2(3), 9(10), 16(17), 23(24)-(hexakis-pyridin-3-yloxy phthalocyaninato)} dineodymium (III) acetate (3) is linked to amino-functionalized multi-walled carbon nanotubes (MWCNT) to form 3-MWCNT. Z-scan technique was employed to experimentally determine the nonlinear absorption coefficient from the open-aperture data. The limiting threshold values as low as 0.045 J cm−2 were found in solution. The conjugate (3-MWCNT) gave better optical limiting behavior than complex 3 alone.
- Full Text:
- Date Issued: 2016
Optically active BODIPYs
- Lu, Hua, Mack, John, Nyokong, Tebello, Kobayashi, Nagao, Shen, Zhen
- Authors: Lu, Hua , Mack, John , Nyokong, Tebello , Kobayashi, Nagao , Shen, Zhen
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/240421 , vital:50833 , xlink:href="https://doi.org/10.1016/j.ccr.2016.03.015"
- Description: This review highlights and summarizes various optically active BODIPY molecules and describes the analysis of their circular dichroism (CD) and circularly polarized luminescence (CPL) spectroscopy, to provide a platform for the rational design of novel optically active BODIPY structures and the development of new chiroptical applications. Possible future research directions are also discussed.
- Full Text:
- Date Issued: 2016
- Authors: Lu, Hua , Mack, John , Nyokong, Tebello , Kobayashi, Nagao , Shen, Zhen
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/240421 , vital:50833 , xlink:href="https://doi.org/10.1016/j.ccr.2016.03.015"
- Description: This review highlights and summarizes various optically active BODIPY molecules and describes the analysis of their circular dichroism (CD) and circularly polarized luminescence (CPL) spectroscopy, to provide a platform for the rational design of novel optically active BODIPY structures and the development of new chiroptical applications. Possible future research directions are also discussed.
- Full Text:
- Date Issued: 2016
Optimisation of clearcoat viscosity
- Authors: Bukula, Nwabisa Asanda
- Date: 2016
- Subjects: Coating processes , Automobiles -- Bodies -- Maintenance and repair
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/4814 , vital:20707
- Description: Modern automobiles are painted with basecoat, technology which is either metallic, solid colour or pearlescent. This requires protection from chemicals, scratching, weathering and UV light by applying a protective top coat (clearcoat) over the basecoat. For the clearcoat to cure into a hard protective shell it undergoes an irreversible crosslinking process. This usually takes place over the first four to five hours, depending on the formulation and weather conditions. The speed of crosslinking can be enhanced by temperature. Pot life is important as it can affect the overall quality of the painted surface. If crosslinking occurs too quickly, before the clearcoat is applied onto the surface, the clearcoat cannot be used to produce a good quality finish. The “expired” mixture is thus discarded. If used, the quality of the finished product cannot be guaranteed to last, and the paintwork may have to be redone. This often means removing the underlying paint and primer as well with the clearcoat film. Besides the time lost, the discarded clearcoat mixture often lands in the landfill, polluting ground water and the environment. It is thus important from the point of view of both the environment preservation and waste management, that as much clearcoat as possible is used without being wasted. It was proven in an earlier study (BSc Hon Formulation Science Treatise, 2011) that adding eugenol to a clearcoat mixture after crosslinking had started could reduce its viscosity, which is an indicator of crosslinking progress. Crosslinking subsequently resumed at a lower rate than in traditional blends. If stored away from oxygen and high temperatures, this blend could maintain optimum viscosity indefinitely. In this follow up study an optimum formulation was developed using D - optimal experimental design. It sought to extend the pot life to avoid waste to spray painters while saving the environment from pollution. The formulation that gave the desired viscosity after five hours of pot life was adopted. It was hypothesised that the optimum formulated clearcoat mixture would have a longer pot life than its traditional counterparts, and that it would perform just as well as the traditional clearcoat mixtures. To study the rate of crosslinking (disappearance of functional groups and appearance of the urethane bond), FTIR spectrometry was performed on a mixture produced from the optimized formula in comparison to that of a traditional mixture (the control). The rate of disappearance of functional groups was found to be lower in the eugenol mixture than in the control mixture. After six hours, eugenol was added into the control mixture, and this seemed to reduce the viscosity with the re-emergence of functional groups in the mixture. After 24 hours of crosslinking, an FTIR scan was done on the solid sample and this revealed that the eugenol mixture had crosslinked fully, with no detectable functional groups in the sample.
- Full Text:
- Date Issued: 2016
- Authors: Bukula, Nwabisa Asanda
- Date: 2016
- Subjects: Coating processes , Automobiles -- Bodies -- Maintenance and repair
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/4814 , vital:20707
- Description: Modern automobiles are painted with basecoat, technology which is either metallic, solid colour or pearlescent. This requires protection from chemicals, scratching, weathering and UV light by applying a protective top coat (clearcoat) over the basecoat. For the clearcoat to cure into a hard protective shell it undergoes an irreversible crosslinking process. This usually takes place over the first four to five hours, depending on the formulation and weather conditions. The speed of crosslinking can be enhanced by temperature. Pot life is important as it can affect the overall quality of the painted surface. If crosslinking occurs too quickly, before the clearcoat is applied onto the surface, the clearcoat cannot be used to produce a good quality finish. The “expired” mixture is thus discarded. If used, the quality of the finished product cannot be guaranteed to last, and the paintwork may have to be redone. This often means removing the underlying paint and primer as well with the clearcoat film. Besides the time lost, the discarded clearcoat mixture often lands in the landfill, polluting ground water and the environment. It is thus important from the point of view of both the environment preservation and waste management, that as much clearcoat as possible is used without being wasted. It was proven in an earlier study (BSc Hon Formulation Science Treatise, 2011) that adding eugenol to a clearcoat mixture after crosslinking had started could reduce its viscosity, which is an indicator of crosslinking progress. Crosslinking subsequently resumed at a lower rate than in traditional blends. If stored away from oxygen and high temperatures, this blend could maintain optimum viscosity indefinitely. In this follow up study an optimum formulation was developed using D - optimal experimental design. It sought to extend the pot life to avoid waste to spray painters while saving the environment from pollution. The formulation that gave the desired viscosity after five hours of pot life was adopted. It was hypothesised that the optimum formulated clearcoat mixture would have a longer pot life than its traditional counterparts, and that it would perform just as well as the traditional clearcoat mixtures. To study the rate of crosslinking (disappearance of functional groups and appearance of the urethane bond), FTIR spectrometry was performed on a mixture produced from the optimized formula in comparison to that of a traditional mixture (the control). The rate of disappearance of functional groups was found to be lower in the eugenol mixture than in the control mixture. After six hours, eugenol was added into the control mixture, and this seemed to reduce the viscosity with the re-emergence of functional groups in the mixture. After 24 hours of crosslinking, an FTIR scan was done on the solid sample and this revealed that the eugenol mixture had crosslinked fully, with no detectable functional groups in the sample.
- Full Text:
- Date Issued: 2016
Optimisation of glass scoring operation
- Authors: Bechoo, Durvesh Sookraj
- Date: 2016
- Subjects: Glass -- Mechanical properties , Glass manufacture
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/9283 , vital:26559
- Description: The economic crisis and prior recession made a huge dent in many industries. Companies want a cheaper manufactured product with same quality to satisfy the customer in order be competitive yet profitable. Shatterprufe is a company that produces automotive glass. The company has a vast number of products and experience short production run lengths because of its order intake from customers. These short production run lengths require accurate setup to have a repeatable and stable process. An incorrect setup will produce a high scrap rate on production runs. Glass being very brittle and machining it incorrectly results in flaws, breakages or edge stresses that lead to latter process failures. The scoring operation of glass is key to achieve good edge quality to prevent such defects. The correct tools and machine parameters influence good edge quality during the setup procedure. Due to the process having many variables it is difficult to have a stable process and a repeatable stable process. This research will analyse the tool, parameters of the tool and machine parameters to achieve best edge quality and correlating these parameters that will lead to a repeatable stable process. An experimental analysis was conducted on 2.1mm and 2.5mm thick glass. These thicknesses are used predominantly at Shatterprufe automotive glass manufacturing company. The first sample and last sample was analysed during a production run. An average production run length is 36 pieces of glass. The edge quality was seen under a microscope and the fissure depth was measured. To achieve ideal edge quality, the fissure depth must be 15-20% deep of the glass thickness. A fissure is a crack propagated during the scoring of glass. A carbide wheel is used to score the glass. The carbide wheel parameters were varied being the wheel angle and wheel diameter. A 145 degree-4.1mm wheel, 145degree-5.6mm wheel and a 155 degree- 4.1mm wheel was used. The following relationships where observed being the wheel diameter and fissure depth. An increase in wheel diameter resulted in an increase in fissure depth but decreases the wheel life as the wheel becomes blunt. There was inconsistency on fissure depth with the larger diameter wheel. An increased in wheel angle from 145 degree to 155 degree promoted flaws in the glass. Larger wheel angles work better on glass thicknesses of 4-5mm as currently used in the Shatterprufe Struandale Company. An investigation on pressure variation in the pneumatic system was analysed using a pressure transmitter. The pressure transmitter measured the pressure per second versus the set pressure and recorded this data on a data logger. There was no pressure variation in the pneumatic system that can influence poor glass edge quality. A load cell analysis will investigate the physical applied pressure on the glass versus the set pressure. This analysis was to determine the relationship between set versus actual on the glass. It will indicate any mechanical fault. A mechanical fault could be a loose coupling or linkage that can influence the fissure depth. A direct proportional relationship was achieved between the set pressure versus the load cell readings. This indicates no mechanical fault on the system.
- Full Text:
- Date Issued: 2016
- Authors: Bechoo, Durvesh Sookraj
- Date: 2016
- Subjects: Glass -- Mechanical properties , Glass manufacture
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/9283 , vital:26559
- Description: The economic crisis and prior recession made a huge dent in many industries. Companies want a cheaper manufactured product with same quality to satisfy the customer in order be competitive yet profitable. Shatterprufe is a company that produces automotive glass. The company has a vast number of products and experience short production run lengths because of its order intake from customers. These short production run lengths require accurate setup to have a repeatable and stable process. An incorrect setup will produce a high scrap rate on production runs. Glass being very brittle and machining it incorrectly results in flaws, breakages or edge stresses that lead to latter process failures. The scoring operation of glass is key to achieve good edge quality to prevent such defects. The correct tools and machine parameters influence good edge quality during the setup procedure. Due to the process having many variables it is difficult to have a stable process and a repeatable stable process. This research will analyse the tool, parameters of the tool and machine parameters to achieve best edge quality and correlating these parameters that will lead to a repeatable stable process. An experimental analysis was conducted on 2.1mm and 2.5mm thick glass. These thicknesses are used predominantly at Shatterprufe automotive glass manufacturing company. The first sample and last sample was analysed during a production run. An average production run length is 36 pieces of glass. The edge quality was seen under a microscope and the fissure depth was measured. To achieve ideal edge quality, the fissure depth must be 15-20% deep of the glass thickness. A fissure is a crack propagated during the scoring of glass. A carbide wheel is used to score the glass. The carbide wheel parameters were varied being the wheel angle and wheel diameter. A 145 degree-4.1mm wheel, 145degree-5.6mm wheel and a 155 degree- 4.1mm wheel was used. The following relationships where observed being the wheel diameter and fissure depth. An increase in wheel diameter resulted in an increase in fissure depth but decreases the wheel life as the wheel becomes blunt. There was inconsistency on fissure depth with the larger diameter wheel. An increased in wheel angle from 145 degree to 155 degree promoted flaws in the glass. Larger wheel angles work better on glass thicknesses of 4-5mm as currently used in the Shatterprufe Struandale Company. An investigation on pressure variation in the pneumatic system was analysed using a pressure transmitter. The pressure transmitter measured the pressure per second versus the set pressure and recorded this data on a data logger. There was no pressure variation in the pneumatic system that can influence poor glass edge quality. A load cell analysis will investigate the physical applied pressure on the glass versus the set pressure. This analysis was to determine the relationship between set versus actual on the glass. It will indicate any mechanical fault. A mechanical fault could be a loose coupling or linkage that can influence the fissure depth. A direct proportional relationship was achieved between the set pressure versus the load cell readings. This indicates no mechanical fault on the system.
- Full Text:
- Date Issued: 2016
Optimising design and effort for environmental surveys using dung beetles (Coleoptera: Scarabaeidae):
- Tocco, Claudia, Quinn, Danielle, Midgley, John M, Villet, Martin H
- Authors: Tocco, Claudia , Quinn, Danielle , Midgley, John M , Villet, Martin H
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140670 , vital:37908 , DOI: 10.4039/tce.2016.48
- Description: In biological monitoring, deploying an effective standardised quantitative sampling method, optimised by trap design and sampling effort, is an essential consideration. To exemplify this using dung beetle (Coleoptera: Scarabaeidae: Scarabaeinae and Aphodiinae) communities, three pitfall trap designs (un-baited (TN), baited at ground level (flat trap, TF), and baited above the trap (hanging trap, TH)), employed with varying levels of sampling effort (number of traps = 1, 2, 3… 10; number of days = 1, 2, 3), were evaluated for sampling completeness and efficiency in the Eastern Cape, South Africa. Modelling and resampling simulation approaches were used to suggest optimal sampling protocols across environmentally diverse sites. Overall, TF recovered the greatest abundance and species richness of dung beetles, but behavioural guilds showed conflicting trends: endocoprids preferred TH while paracoprids and telocoprids preferred TF. Resampling simulation of trap type and the two components of sampling effort suggested that six TF traps left for three days was most efficient in obtaining a representative sample and allowed differentiation between trap types, allowing the improved efficiency to be recognised. The effect of trap type on non-target specimens, particularly ants, was also investigated. TF and TH caught almost no by-catch, which is ethically desirable.
- Full Text:
- Date Issued: 2016
- Authors: Tocco, Claudia , Quinn, Danielle , Midgley, John M , Villet, Martin H
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140670 , vital:37908 , DOI: 10.4039/tce.2016.48
- Description: In biological monitoring, deploying an effective standardised quantitative sampling method, optimised by trap design and sampling effort, is an essential consideration. To exemplify this using dung beetle (Coleoptera: Scarabaeidae: Scarabaeinae and Aphodiinae) communities, three pitfall trap designs (un-baited (TN), baited at ground level (flat trap, TF), and baited above the trap (hanging trap, TH)), employed with varying levels of sampling effort (number of traps = 1, 2, 3… 10; number of days = 1, 2, 3), were evaluated for sampling completeness and efficiency in the Eastern Cape, South Africa. Modelling and resampling simulation approaches were used to suggest optimal sampling protocols across environmentally diverse sites. Overall, TF recovered the greatest abundance and species richness of dung beetles, but behavioural guilds showed conflicting trends: endocoprids preferred TH while paracoprids and telocoprids preferred TF. Resampling simulation of trap type and the two components of sampling effort suggested that six TF traps left for three days was most efficient in obtaining a representative sample and allowed differentiation between trap types, allowing the improved efficiency to be recognised. The effect of trap type on non-target specimens, particularly ants, was also investigated. TF and TH caught almost no by-catch, which is ethically desirable.
- Full Text:
- Date Issued: 2016
Optimising the marketing mix to influence consumer purchasing decisions in liquor outlets
- Authors: Mhlatyana, Lovington Unathi
- Date: 2016
- Subjects: Branding (Marketing) -- South Africa -- Eastern Cape Consumer behavior -- South Africa -- Eastern Cape Liquor industry -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11712 , vital:26959
- Description: Retailers, Wholesalers, Marketers, Alcohol distributors and Manufacturers continuously fight for volume growth and market-share gain within the total alcohol market. Most of the answers of how much each can gain over a period of time remain a mystery that can only be answered by the consumers. The consumers determine who will have more share of wallet or share of throat more than the other. This is also equally applicable to brands, packs and the various alcohol categories that exist in the market. Why is it important, you possibly wonder? It is important because the alcohol market is an integrated part of our society; it contributes immensely to the South African economy and its value chain is enormous in value. Consumption expenditure increased from R3 513 039 000 in 2004 to R8 558 232 000 by 2013 in the Eastern Cape alone. In the last 10 years there has been an increase of new products that are being introduced into the market across all categories ranging from traditional alcoholic brands to flavoured and ready to drink brands. This presents an opportunity to alcohol consumers, alcohol shoppers and sellers alike. This opportunity meant that the consumer is spoilt for choice and retailers / wholesalers have an opportunity to list more brands which could possibly result in increased margins. Further to the above, South African marketers face both market challenges as well as proposed legislation regarding advertising of alcohol products. Some of the challenges include marketing clutter, competition, diverse nature of the South African consumer, infrastructure issues, government legislations, social media and digital platforms. The liquor industry of the Eastern Cape contributes approximately R7,7 billion to the Gross Geographic Product of the economy of the Eastern Cape through direct and indirect impacts; Approximately 23 620 permanent jobs are supported by the Eastern Cape liquor industry annually; Tax revenue attributable to the liquor industry in the Eastern Cape is R3,9 billion; and the economic impact of the liquor industry on gross capital formation is in the region R3,4 billion per annum. The purpose of this research is to optimise the marketing mix to influence consumer purchasing decisions in liquor outlets within the Border district within the above context. The objective of this study is to identify the marketing mix that influences consumer purchasing decisions in liquor outlets. The study will be conducted within the Border district. The Border district consists of various geographies within the Eastern Cape, South Africa. The area of the study will focus on key municipalities namely; Buffalo city, Amathole, Chris Hani and Joe Gqabi municipalities. The target sample size for this study was 360 consumers. A survey questionnaire was used to measure respondents’ preferences, attitudes, motivations and perceptions. The respondents were instructed to highlight the answer that best described them and / or their preferences. Questions were asked and the respondents had to highlight to what extent they agreed or disagreed with the question. Key findings are that there is high level of agreement that price and promotions influence consumer-purchasing decision in liquor outlets. The highest percentage of respondents are in agreement that beer is a first choice of drink and a second is spirits. 69% of the respondents agree that they change from the usual drink to a different drink when they go out. This can be attributed to the notion that consumers like to badge and want to be seen drinking brands that will be deemed socially acceptable in public, or brands that are the latest trend. The key benefits from the study include improved ability for marketers to reposition brands, give clear recommendations for drinking occasions and better understanding on how to efficiently distribute alcohol portfolios, extend brands and introduce limited editions.
- Full Text:
- Date Issued: 2016
- Authors: Mhlatyana, Lovington Unathi
- Date: 2016
- Subjects: Branding (Marketing) -- South Africa -- Eastern Cape Consumer behavior -- South Africa -- Eastern Cape Liquor industry -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11712 , vital:26959
- Description: Retailers, Wholesalers, Marketers, Alcohol distributors and Manufacturers continuously fight for volume growth and market-share gain within the total alcohol market. Most of the answers of how much each can gain over a period of time remain a mystery that can only be answered by the consumers. The consumers determine who will have more share of wallet or share of throat more than the other. This is also equally applicable to brands, packs and the various alcohol categories that exist in the market. Why is it important, you possibly wonder? It is important because the alcohol market is an integrated part of our society; it contributes immensely to the South African economy and its value chain is enormous in value. Consumption expenditure increased from R3 513 039 000 in 2004 to R8 558 232 000 by 2013 in the Eastern Cape alone. In the last 10 years there has been an increase of new products that are being introduced into the market across all categories ranging from traditional alcoholic brands to flavoured and ready to drink brands. This presents an opportunity to alcohol consumers, alcohol shoppers and sellers alike. This opportunity meant that the consumer is spoilt for choice and retailers / wholesalers have an opportunity to list more brands which could possibly result in increased margins. Further to the above, South African marketers face both market challenges as well as proposed legislation regarding advertising of alcohol products. Some of the challenges include marketing clutter, competition, diverse nature of the South African consumer, infrastructure issues, government legislations, social media and digital platforms. The liquor industry of the Eastern Cape contributes approximately R7,7 billion to the Gross Geographic Product of the economy of the Eastern Cape through direct and indirect impacts; Approximately 23 620 permanent jobs are supported by the Eastern Cape liquor industry annually; Tax revenue attributable to the liquor industry in the Eastern Cape is R3,9 billion; and the economic impact of the liquor industry on gross capital formation is in the region R3,4 billion per annum. The purpose of this research is to optimise the marketing mix to influence consumer purchasing decisions in liquor outlets within the Border district within the above context. The objective of this study is to identify the marketing mix that influences consumer purchasing decisions in liquor outlets. The study will be conducted within the Border district. The Border district consists of various geographies within the Eastern Cape, South Africa. The area of the study will focus on key municipalities namely; Buffalo city, Amathole, Chris Hani and Joe Gqabi municipalities. The target sample size for this study was 360 consumers. A survey questionnaire was used to measure respondents’ preferences, attitudes, motivations and perceptions. The respondents were instructed to highlight the answer that best described them and / or their preferences. Questions were asked and the respondents had to highlight to what extent they agreed or disagreed with the question. Key findings are that there is high level of agreement that price and promotions influence consumer-purchasing decision in liquor outlets. The highest percentage of respondents are in agreement that beer is a first choice of drink and a second is spirits. 69% of the respondents agree that they change from the usual drink to a different drink when they go out. This can be attributed to the notion that consumers like to badge and want to be seen drinking brands that will be deemed socially acceptable in public, or brands that are the latest trend. The key benefits from the study include improved ability for marketers to reposition brands, give clear recommendations for drinking occasions and better understanding on how to efficiently distribute alcohol portfolios, extend brands and introduce limited editions.
- Full Text:
- Date Issued: 2016
Optimising the work integrated learning of student nurses
- Authors: Gerber, Karin
- Date: 2016
- Subjects: Nursing -- Study and teaching , Nursing students Education, Cooperative -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: http://hdl.handle.net/10948/7721 , vital:23415
- Description: According to the Council on Higher Education (CHE, 2011:78) the term Work Integrated Learning (WIL) refers to an educational approach that aligns academic and workplace practices for the mutual benefit of students and workplaces. The CHE (2011:4) further describes WIL as an approach to career-focussed education that includes classroom-based and workplace-based forms of learning that are appropriate for the professional qualifications. WIL forms part of many training programmes for professions across the globe and is considered an important aspect of preparing the trainee or student to integrate theoretical learning into the clinical environment in which he or she will be building his or her career. WIL is considered crucial for the development of professional attributes and competencies needed to perform duties within the chosen profession once the trainee is qualified. Health care professions across the world employ WIL in clinical areas as an integral part of their curricula and nursing specifically is one of the health care professions that utilise a large component of WIL for clinical development of the student nurses. In South Africa, student nurses are currently placed in a variety of clinical settings in order to obtain the required and regulated clinical experience that work integrated learning should offer them. However, anecdotal evidence indicated that student nurses from the various Nursing Education Institutions in Nelson Mandela Bay experienced difficulty in finding adequate opportunities to develop their newly acquired skills when in the clinical areas and reported great difficulties in achieving their WIL outcomes. The aim of this study was to explore and describe the student nurses’ experiences of work integrated learning in various clinical areas in the Nelson Mandela Bay. This study followed a qualitative, exploratory, descriptive and contextual design with two phases. Thirty-five student nurses in their third and fourth-year were purposely sampled. In phase one data was collected using two steps, where the first step comprised using naïve sketches. During the second step interviews were done by means of focus groups using semi-structured questions and responsive interviewing. Data was transcribed verbatim and analysed thematically using Tesch’s method of analysis. In phase two recommendations for nurse educators to optimise WIL were formulated. The following three themes and related sub-themes emerged from the analysis: 1) Student nurses experienced a multitude of challenges in the clinical placement areas (CPA) and at the nursing education institution (NEI) that negatively impact on their morale and hinder WIL, namely lack of resources, unsupportive learning environments, a lack of belonging and workplace violence. 2) Positive experiences resulted in motivated and enthusiastic students, namely being inspired by role models, enhanced learning when support was offered and personal growth. 3) Students offered recommendations for enabling their WIL, namely adequate mentoring and clinical support, adequate financial support related to WIL and adjusting the nursing programmes to better incorporate the students’ needs. Relevant literature and recommendations offered by the student nurses were used to formulate recommendations with action steps for nurse educators to optimise work integrated learning of student nurses.
- Full Text:
- Date Issued: 2016
- Authors: Gerber, Karin
- Date: 2016
- Subjects: Nursing -- Study and teaching , Nursing students Education, Cooperative -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: http://hdl.handle.net/10948/7721 , vital:23415
- Description: According to the Council on Higher Education (CHE, 2011:78) the term Work Integrated Learning (WIL) refers to an educational approach that aligns academic and workplace practices for the mutual benefit of students and workplaces. The CHE (2011:4) further describes WIL as an approach to career-focussed education that includes classroom-based and workplace-based forms of learning that are appropriate for the professional qualifications. WIL forms part of many training programmes for professions across the globe and is considered an important aspect of preparing the trainee or student to integrate theoretical learning into the clinical environment in which he or she will be building his or her career. WIL is considered crucial for the development of professional attributes and competencies needed to perform duties within the chosen profession once the trainee is qualified. Health care professions across the world employ WIL in clinical areas as an integral part of their curricula and nursing specifically is one of the health care professions that utilise a large component of WIL for clinical development of the student nurses. In South Africa, student nurses are currently placed in a variety of clinical settings in order to obtain the required and regulated clinical experience that work integrated learning should offer them. However, anecdotal evidence indicated that student nurses from the various Nursing Education Institutions in Nelson Mandela Bay experienced difficulty in finding adequate opportunities to develop their newly acquired skills when in the clinical areas and reported great difficulties in achieving their WIL outcomes. The aim of this study was to explore and describe the student nurses’ experiences of work integrated learning in various clinical areas in the Nelson Mandela Bay. This study followed a qualitative, exploratory, descriptive and contextual design with two phases. Thirty-five student nurses in their third and fourth-year were purposely sampled. In phase one data was collected using two steps, where the first step comprised using naïve sketches. During the second step interviews were done by means of focus groups using semi-structured questions and responsive interviewing. Data was transcribed verbatim and analysed thematically using Tesch’s method of analysis. In phase two recommendations for nurse educators to optimise WIL were formulated. The following three themes and related sub-themes emerged from the analysis: 1) Student nurses experienced a multitude of challenges in the clinical placement areas (CPA) and at the nursing education institution (NEI) that negatively impact on their morale and hinder WIL, namely lack of resources, unsupportive learning environments, a lack of belonging and workplace violence. 2) Positive experiences resulted in motivated and enthusiastic students, namely being inspired by role models, enhanced learning when support was offered and personal growth. 3) Students offered recommendations for enabling their WIL, namely adequate mentoring and clinical support, adequate financial support related to WIL and adjusting the nursing programmes to better incorporate the students’ needs. Relevant literature and recommendations offered by the student nurses were used to formulate recommendations with action steps for nurse educators to optimise work integrated learning of student nurses.
- Full Text:
- Date Issued: 2016