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Tuning the physico-electrochemical properties of novel cobalt (II) octa [(3, 5-biscarboxylate)-phenoxy] phthalocyanine complex using phenylamine-functionalised SWCNTs

  • Authors: Agboola, Bolade O , Ozoemena, Kenneth I , Nyokong, Tebello , Fukuda, Takamitsu , Kobayashi, Nagao
  • Date: 2010
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/261692 , vital:53435 , xlink:href="https://doi.org/10.1016/j.carbon.2009.10.023"
  • Description: The integration of phenylamine-functionalised SWCNTs (SWCNT-phenylamine) with a novel cobalt (II) octa[(3,5-biscarboxylate)-phenoxy] phthalocyanine (CoOBPPc) complex has been described. The physical and electrochemical properties of the CoOBPPc-SWCNT-phenylamine hybrid were evaluated using spectroscopy (IR and UV–vis), field emission scanning electron microscopy and electrochemistry (cyclic voltammetry and electrochemical impedance spectroscopy). Integration of SWCNT-phenylamine resulted in the physical transformation of the CoOBCPPc from the usually bluish colour of cobalt phthalocyanine complexes to a beautiful bright green colour. In addition, the heterogeneous electron transfer kinetics and electrocatalytic properties of the CoOBCPPc were greatly enhanced following the attachment of the SWCNT-phenylamine. The potential electrocatalytic application of the hybrid was tested using β-nicotinamide adenine dinucleotide (NADH) as a model biological analyte. Interestingly, the onset oxidation potential of this analyte was significantly reduced (300 mV) by this hybrid compared to the bare electrode.
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  • Date Issued: 2010

Unethical decision-making and behaviour in the life insurance sector of South Africa

  • Authors: Van Greunen, Conrad
  • Date: 2010
  • Subjects: Insurance companies -- Corrupt pratices -- South Africa , Business ethics -- South Africa
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:9282 , http://hdl.handle.net/10948/1364 , Insurance companies -- Corrupt pratices -- South Africa , Business ethics -- South Africa
  • Description: The public is regularly shocked by revelations of new business scandals. Nearly every sector of society is tainted by incidents of unethical behaviour. In this regard, the South African financial services industry has attracted a lot of attention, as some of the biggest scandals in recent years have occurred in this industry. With the world economy still experiencing the effects of the global recession, the last thing that institutions in the financial arena must do is engage in unethical behaviour. Immoral behaviour could damage a company's repution and lead to further financial losses. The purpose of this study was thus two-fold: firstly, to investigae the factors that influence unethical decision-making and behaviour in the local life insurance sector, and secondly to evaluate how business ethics are institutionalised at a sample of life insurance companies.
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  • Date Issued: 2010

Unfair discrimination and dismissal based on age

  • Authors: Thompson, David Martin Ogilvie
  • Date: 2010
  • Subjects: Age discrimination in employment -- South Africa , Employees -- Dismissal of -- South Africa
  • Language: English
  • Type: Thesis , Masters , LLM
  • Identifier: vital:10218 , http://hdl.handle.net/10948/1287 , Age discrimination in employment -- South Africa , Employees -- Dismissal of -- South Africa
  • Description: Section 187(2)(b) of the Labour Relations Act sets out certain justifications for what may seem to be unfair discrimination in the workplace. The purpose of this note is to discuss the provisions of Age Discrimination, with specific focus on the rights of older employees, who have reached, what some might term, the ‘normal or agreed retirement age’. In the discuss which follows reference will be made to the Constitution of the Republic of South Africa1 in order to investigate the provisions of our new democratic era, and what is said therein about discrimination, and age discrimination in particular. In our new Constitutional dispensation there have also been circumstances where certain kinds of discrimination have become accepted on society, for example Affirmative Action, and an enquiry into the difference between discrimination and differentiation will therefore also be necessary. The provisions of the Employment Equity Act,2 which deal specifically with eliminating unfair discrimination in the workplace, and the Labour Relations Act,3 which deals primarily with the rights of employees, employers and trade unions, and seeks to harmonize employer-employee relations will be discussed wherein specific reference will be made to section 187(2)(b) of the LRA. A further discussion will outline the circumstances of what is meant by dismissal in the context of age based dismissals, and whether such a dismissal is infact a dismissal and whether, within the requirements of the LRA such a dismissal, or termination of employment contract, is infact fair. Furthermore, a comparative perspective of other jurisdictions will give a more complete understanding of the issue of age-based dismissals within the current context. However, to refer to legislation and foreign decisions alone, while being of important reference, is not enough and a enquiry into our own case law will be of significant importance to determine a path of direction one can expect when faced with a question of dismissals based on mandatory retirement ages, and in particular, a dismissal which has been so executed with recourse to section 187(2)(b) of the LRA. In the various cases the reasoning and rationale behind the decision making will shed light on a seemingly unresolved area of labour law, and in reading further not only in the judgments but also in various articles, one will see that there are many arguments for and against the use of a mandatory retirement age, the most important of which will be highlighted.
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  • Date Issued: 2010

Unfallen women : negotiations of alternative feminine identities in selected writings by Olive Schreiner

  • Authors: Snyman, Vicki
  • Date: 2010
  • Subjects: Schreiner, Olive, 1855-1920 Criticism and interpretation Schreiner, Olive, 1855-1920 Story of an African farm Schreiner, Olive, 1855-1920 From man to man Schreiner, Olive, 1855-1920 Undine Feminism in literature Women and literature -- South Africa -- History South African literature (English) -- History and criticism
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2214 , http://hdl.handle.net/10962/d1002257
  • Description: This study constitutes an inquiry into how Olive Schreiner‟s peripheral position as a colonial woman writer enabled her rewriting of feminine identity, specifically her subversion of Victorian feminine stereotypes. I focus particular attention on three novels: The Story of an African Farm (1890), and the posthumously published From Man to Man (1926) and Undine (1929). I employ a feminist literary approach to examine how Schreiner‟s hybrid identity as a British South African enabled her revisioning of femininity. If Schreiner is situated within the context of her time, it can be demonstrated that her negotiations of feminine identity are influenced by her dual intellectual and cultural heritage. On the one hand, she can be situated within a British tradition of women‟s writing – in particular, the New Woman fiction which emerged in the late nineteenth century. On the other hand, she can be situated within a nascent South African literary tradition – and demonstrates prototypically post-colonial concerns. Schreiner‟s writing style develops out of her colonial heritage and her experiences as a woman living in a patriarchal society. The resultant voice subverts the narrative traditions of the metropolitan novel in an attempt to articulate an alternative view of femininity. I examine in detail how Schreiner undermines and subverts Victorian stereotypes, and focus particular attention on the „fallen woman‟ and the „mother-figure‟. She attempts to challenge conventional Victorian conceptions of femininity by erasing the binary between the „angel‟ and the „whore‟ in order to create a New Woman. In Undine and The Story of an African Farm the full realisation of this New Woman is deferred, since both protagonists die, but From Man to Man is more nuanced, particularly in its emphasis on economic empowerment for women. Schreiner also destabilises traditional notions of motherhood, in order to offer glimpses of an alternative maternal role. It is my contention that, in her depiction of mother-figures and (un)fallen women, Schreiner challenges stock Victorian notions of femininity and, in the process, creates a space in which new possibilities for women can be imagined and negotiated.
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  • Date Issued: 2010

Unfinished business: current and past trade union leaders' perceptions of the political transition after the first decade of democracy (1994-2004) in South Africa

  • Authors: Mpunzima, Kayalethu Wycliff
  • Date: 2010
  • Subjects: Labor unions -- South Africa , Democratization -- South Africa , South Africa -- Politics and government -- 1994-
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:11001 , http://hdl.handle.net/10948/1284 , Labor unions -- South Africa , Democratization -- South Africa , South Africa -- Politics and government -- 1994-
  • Description: The study reviews the political transition after the first decade of democracy from the trade union leaders’ perspectives. It seeks to understand whether trade union leaders see workers as having reaped benefits from their struggles. Interviews were conducted with ten current and past trade union leaders on their perceptions about the political transition. The trade union leaders that were interviewed have rich experience of combining their organisational and mobilising strength with strategies of engagement. Their involvement with trade unions can be traced back during the dark years of Apartheid. Some of them are still active members of trade unions who are deeply involved in policy formulation at national level. Others occupy influential positions in the private and public sectors. The study investigates and analyses the labour movement’s objectives, strategies and struggles from the apartheid, transition, and democratic eras and into the future. It looks at how these objectives were achieved and how the strategies were implemented. The study revealed that progress was made in the political sphere, e.g. a parliamentary office was established to ensure that workers have a voice in parliament. The study found clear evidence of influence by the labour movement in economic and labour legislation through structures like NEDLAC. In the economic arena, the study found that workers’ economic expectations were partially fulfilled. Trade union leaders attributed this to the failure of the government’s GEAR policy to create jobs. They insisted that RDP should be implemented. The study revealed evidence of serious tensions within the ANC/COSATU/SACP Alliance. The study found that the influence of the labour ally, COSATU, in the Tripartite Alliance had been curtailed. The study also found that the strength of the labour movement eroded during the first decade of democracy. The research found that the labour movement took new initiatives such as union investment companies. The research also found support for the theory that COSATU’s obsession with alliance politics was a barrier to labour unity. COSATU was not involved in the merger talks between FEDUSA and NACTU. The respondents generally felt positively about the future prospects. Respondents were mostly optimistic about the political transformation. If there was slow delivery or no delivery by the government or business, the unions vowed to take to the streets.
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  • Date Issued: 2010

Unionism and public service reform in Lesotho: between legislative constraints and apathy

  • Authors: Maema, Mapule
  • Date: 2010
  • Subjects: Civil service -- Lesotho , Labor unions -- Lesotho , Civil service reform -- Lesotho
  • Language: English
  • Type: Thesis , Masters , MSocSc
  • Identifier: vital:3306 , http://hdl.handle.net/10962/d1003094 , Civil service -- Lesotho , Labor unions -- Lesotho , Civil service reform -- Lesotho
  • Description: The study focuses on Lesotho‟s Public Service. The aims of this study were to examine the factors that led to the repeal of the Public Service Act No.13 of 1995. This study looks at the legislative constraints and attitudes of civil servants towards unionisation in the Public Service. It also outlines the relevant provisions of the Public Service Act No.1 of 2005; the changes that have occurred since its inception. Findings show that the Public Service Act No.13 of 1995 was repealed in order to reform the Public Service. The Ministry of the Public Service implemented five-year strategic plans to reform the public service. Changes have occurred in the public service since the inception of the 2005 Act; however, they differ from ministry to ministry. The respondents included public officers from the Ministry of the Public Service, Ministry of Justice, Law Office, Ministry of Employment and Labour, Ministry of Planning, the Ombudsman Office, Parliament, different ministries, the International Labour Organisation (ILO), the Congress of the Lesotho Trade Unions (COLETU) and the Lesotho Public Service Staff Association (LEPSSA).
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  • Date Issued: 2010

Unionism in schools blessing or curse? : a case study of three schools in the Kavango region of Namibia

  • Authors: Musore, Pontianus Vitumbo
  • Date: 2010
  • Subjects: Teachers' unions--Namibia Namibia National Teachers' Union School management and organization--Namibia
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1809 , http://hdl.handle.net/10962/d1003695
  • Description: This study investigates the role played by the Namibia National Teachers’ Union (NANTU) in school management. It examines the challenges faced by school principals in managing schools as a result of the presence of unions. In order to understand the behaviour and impact of union representatives in schools the study makes use of literature on teacher unionism, democratic, political and ambiguity management and leadership theories. Working in the interpretive orientation the study used semi-structured interviews, document analysis and focus group discussions. The research was conducted in the form of a case study involving three schools in the Kavango region of Namibia, and the data collected were dealt with according to case study principles. The study reveals that the presence of the union has several benefits for the school: for example, it advances the democratic participation of stakeholders, provides feedback to the school principal on how staff members experience his or her leadership, and offers advice on labour-related matters. It was also discovered that NANTU representatives act as mediators in conflict situations, which means that teachers can become better at managing and resolving conflict through their experience of serving on the union structures. However it was also discovered that the presence of NANTU in schools has several negative effects on schooling. For example, NANTU activities can disrupt school programmes; moreover, in some schools, neither NANTU representatives nor school principals understand their own or each other’s roles, and consequently they are always in conflict. The absence of a policy regulating the representation of NANTU in decision-making structures in schools causes the conflict to escalate. It emerged that the role of NANTU in schools is mainly determined by the leadership style of the school principal and the effectiveness of the NANTU representatives in that particular school. For example, an autocratic leadership style on the part of the school principal tends to exacerbate the conflict situation, while NANTU has been known to mobilize learners to demand the removal of school principals through class boycotts. NANTU is more concerned with defending the rights and interests of its members than any other matter affecting education. This research is likely to benefit school managers, policy makers and implementers, and NANTU structures, as it provides clarity on what both NANTU and school principals expect from one another. The study also demonstrates that school principals need to acknowledge and consider the divergent nature of the various interest groups in schools.
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  • Date Issued: 2010

Using an RTSP Proxy to implement the IPTV Media Function via a streaming server

  • Authors: Shibeshi, Zelalem S , Terzoli, Alfredo , Bradshaw, Karen L
  • Date: 2010
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/429120 , vital:72561 , https://ieeexplore.ieee.org/abstract/document/5676629
  • Description: Multimedia in IMS, including IPTV, is handled by a separate unit, the Media Function (MF), which is made up of Media Control and Media Delivery Functions (MCF and MDF). According to the different specifications of an IMS based IPTV architecture, the User Equipment (UE) is expected to use the RTSP protocol as a media control protocol to interact with the MCF, and gets delivery of media from the MDF using the RTP protocol. This generally means that the streaming session is initiated from the media controller on behalf of the user but the delivery of media is sent to the UE from the media deliverer (media server). Due to lack of free and open source Media Servers and on the contrary, the availability of free and open source Streaming Servers, the ideal choice for the delivery of media in multimedia services, including IPTV, by the research community are Streaming Servers. Nevertheless, because of denial of service attack and other issues, most streaming servers do not allow different locations for the session setup request and the delivery of media of the streaming session. This makes it difficult to have a separate media control unit for IPTV service in IMS, if one wants to use a streaming server as an MDF unit. For this purpose we propose another component (an RTSP proxy and relay unit) to be part of the IPTV Media Function (MF). The unit will be used to mediate between the MFC and MDF and will properly relay media control (RTSP) commands from the UE and MFC to the MDF and RTP packets from the MDF to the UE. This, we believe, will facilitate the development of an IPTV service using readily available open source streaming servers. In this paper we show how this RTSP proxy and relay unit can be integrated into the Media Function of the IPTV architecture to ease the media delivery process of IMS based IPTV service.
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  • Date Issued: 2010

Using JAIN SLEE as an interaction and policy manager for enabler-based services in next generation networks

  • Authors: Tsietsi, Mosiuoa , Terzoli, Alfredo , Wells, George C
  • Date: 2010
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/431382 , vital:72770 , https://journals.pan.pl/dlibra/publication/100205/edition/86373/content
  • Description: The IP Multimedia Subsystem is a telecommunications framework with a standard architecture for the provision of services. While the services themselves have not been standardised, standards do exist for basic technologies that can be re-used and aggregated in order to construct more complex services. These elements are called service capabilities by the 3GPP and service enablers by the OMA, both of which are repu-table standards bodies in this area. In order to provide re-usability, there is a need to manage access to the service capabilities. Also, in order to build complex services, there is a further need to be able to manage and coordinate the interactions that occur between service capabilities. The 3GPP and the OMA have separately defined network entities that are responsible for handling aspects of these requirements, and are known as a service capability interaction manager (SCIM) and a policy enforcer respectively. However, the internal structure of the SCIM and the policy enforcer have not been standardised by the relevant bodies. In addition, as the SCIM and the policy enforcer have been defined through complementary yet separate processes, there is an opportunity to unify efforts from both bodies. This paper builds on work and stand-ards defined by the bodies, and proposes the design of an interaction manager with features borrowed from both the SCIM and the policy en-forcer. To help validate the design, we have identified a platform known as JAIN SLEE which we believe conforms to the model proposed, and we discuss how JAIN SLEE can be used to implement our ideas.
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  • Date Issued: 2010

Using local experts as benchmarks for household local ecological knowledge: scoring in South African savannas

  • Authors: Steele, Melita Z , Shackleton, Charlie M
  • Date: 2010
  • Language: English
  • Type: Article
  • Identifier: vital:6660 , http://hdl.handle.net/10962/d1007084
  • Description: It is well recognised that local ecological knowledge is an important facet of natural resource management in rural regions of the developing world. However, techniques to assess levels and to integrate it into formal or informal management approaches require further development. In particular, quantitative tools are missing, which would allow more robust analysis of the factors that positively or negatively affect local ecological knowledge and vice versa. This paper reports on a quick assessment approach that provides a quantitative score of generalist local ecological knowledge at the household level. It does so by comparing responses to the knowledge of local people identified as experts within the community. In this way it is both locally constructed and contextualized, and thereby avoids pitfalls of trying to score local ecological knowledge relative to conventional scientific knowledge which frequently cannot account for local constructs. The approach is applied at eight villages throughout the savanna biome in South Africa.
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  • Date Issued: 2010

Using systematic case studies to investigate therapist responsiveness : examples from a case series of PTSD treatments

  • Authors: Edwards, David J A
  • Date: 2010
  • Language: English
  • Type: Article
  • Identifier: vital:6224 , http://hdl.handle.net/10962/d1007774
  • Description: This article highlights the emerging literature on therapist responsiveness in psychotherapy and examines several concepts used to identify dimensions of responsiveness. Some methodological obstacles are identified to studying responsiveness in a systematic manner, and several examples of existing responsiveness research are reviewed. It is argued that meaningful theory on responsiveness has emerged from research methods that are qualitative and interpretive and that the writing of systematic case studies can be of particular importance since only the presentation of a case unfolding over time can disclose some of the more complex aspects of therapist responsiveness. Examination of a series of systematic case studies of the treatment of post traumatic case disorder in South Africa was used to derive a model for guiding therapist responsiveness with respect with what to focus on at a particular phase of the therapy within a particular session. Material from the cases is used to illustrate aspects of the model related to building social support for the client and promoting emotional processing of trauma memories. , Acknowledgements: This research was supported by grants from the National Research Foundation and the Joint Research Committee of Rhodes University. An earlier version of this paper was presented at the Conference of the Society for Psychotherapy Research in Barcelona in 2008 (Edwards, 2008).
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  • Date Issued: 2010

Validating the use of Hippobromus pauciflorus (L.f) Radlk for the treatment of eye infections in the Eastern Cape South Africa

  • Authors: Pendota, Srinivasa Chary
  • Date: 2010
  • Subjects: Medicinal plants -- South Africa -- Eastern Cape , Herbs -- Therapeutic use , Eye -- Infections -- South Africa -- Eastern Cape , Sapindaceae
  • Language: English
  • Type: Thesis , Doctoral , PhD (Botany)
  • Identifier: vital:11303 , http://hdl.handle.net/10353/d1001052 , Medicinal plants -- South Africa -- Eastern Cape , Herbs -- Therapeutic use , Eye -- Infections -- South Africa -- Eastern Cape , Sapindaceae
  • Description: An ethnobotanical survey of plants used for the treatment of eye infections was carried out in the Eastern Cape Province of South Africa. The study revealed that 12 plant species are commonly used with Hippobromus pauciflorus (L.f) Radlk being the most frequent. The crude extracts of the leaves, stem bark and roots of the plant were investigated for antimicrobial activity against 10 bacterial and four fungal strains. The methanol extracts of the plant parts were the most active and showed appreciable activity against Gram-positive and Gram-negative bacteria. The methanol extracts of the leaves and stem bark inhibited the growth of fungi with activities ranging from 78.70 percent to 100 percent on Aspergillus niger and Penicillium notatum. The acetone extracts of the leaves and stem bark were active against A. niger (51.76 percent) and P. notatum (77.22 percent). The aqueous extract of Hippobromus pauciflorus leaves at 50, 100 and 200 mg/kg body weight doses were evaluated for anti-inflammatory, analgesic and antipyretic activities in male Wistar rats. Anti-inflammatory activity was studied by using carrageenan-and histamine induced oedema right hind paw volume while the analgesic effect was evaluated using formalin-induced pain and tail flick nociception response. The brewer’s yeast-induced pyrexia model was used for the antipyretic investigation. The extract at all the doses used significantly inhibited both the carrageenan- and histamine-induced inflammation in a manner that was not dose dependent. The extract reduced the formalin-induced pain licking as well as prolonged the reaction time in the tail flick-induced pain. The effects of the aqueous extract of the plant leaves at 50, 100 and 200 mg/kg body weight doses were investigated for 14 days on some biochemical parameters of male Wistar rats. The extract at all the doses tested did not significantly alter the levels of white blood cells, red blood cells, mean corpuscular volume, platelets, neutrophils, monocytes, lymphocytes and large unstained cells. While the levels of haemoglobin, packed cell volume and basophils increased at specific doses, those of mean corpuscular haemoglobin, mean corpuscular haemoglobin concentration and eosinophils decreased. In vitro antiviral activities of the plant against herpes simplex virus type 1(HSV-1) and coxsakie virus B6 were investigated. Cytotoxicity was evaluated by MTT assay in Vero cells. At concentrations ranging from 165-270/μg/ml there was significant antiviral activity against HSV-1, but toxicity was also noted. There was no antiviral activity against coxsakie virus B6. Bioactivity-guided fractionation of the leaves of H. pauciflorus yielded three known compounds. From the ethyl acetate fraction, two compounds were isolated (epicatechin and -sitosterol ) and from the n- hexane fractions, one compound (lupeol) was isolated. They were isolated and identified using various techniques. The antimicrobial, anti-inflammatory, analgesic and anti-pyretic activity of these compounds have been reported in literature. The structure and distribution of foliar appendages on the leaves of H. pauciflorus were examined by scanning electron microscope. The leaves have long unicellular nonglandular trichomes which were distributed over the mid rib and densely populated at the edges of the adaxial and abaxial surfaces. In general, the experiments and tests conducted in this study appear to have justified the use of Hippobromus pauciflorus for the treatment of eye infections and make a substantial contribution to the knowledge base of the use of herbal medicine for the treatment of the eye infections.
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  • Date Issued: 2010

Validation of high frequency propagation prediction models over Africa

  • Authors: Tshisaphungo, Mpho
  • Date: 2010
  • Subjects: Ionospheric radio wave propagation , Ionospheric radio wave propagation -- Forecasting , Radio meteorology , Radio wave propagation -- Africa , Ionosphere -- Africa -- Radio waves , Atmospheric physics -- Africa , Shortwave radio -- Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5553 , http://hdl.handle.net/10962/d1015239
  • Description: The ionosphere is an important factor in high frequency (HF) radio propagation providing an opportunity to study ionospheric variability as well as the space weather conditions under which HF communication can take place. This thesis presents the validation of HF propagation conditions for the Ionospheric Communication Enhanced Profile Analysis and Circuit (ICEPAC) and Advanced Stand Alone Prediction System (ASAPS) models over Africa by comparing predictions with the measured data obtained from the International Beacon Project (IBP). Since these models were not developed using information on the African region, a more accurate HF propagation prediction tool is required. Two IBP transmitter stations are considered, Ruaraka, Kenya (1.24°S, 36.88°E) and Pretoria, South Africa (25.45°S, 28.10°E) with one beacon receiver station located in Hermanus, South Africa (34.27°S, 19.l2°E). The potential of these models in terms of HF propagation conditions is illustrated. An attempt to draw conclusions for future improvement of the models is also presented. Results show a low prediction accuracy for both ICEPAC and ASAPS models, although ICEPAC provided more accurate predictions for daily HF propagation conditions. This thesis suggests that the development of a new HF propagation prediction tool for the African region or the modification of one of the existing models to accommodate the African region, taking into account the importance of the African ionospheric region, should be considered as an option to ensure more accurate HF Propagation predictions over this region.
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  • Date Issued: 2010

Veldram performance testing of dorper rams in Namibia : performance testing, progency testing and factors influencing sale price of rams

  • Authors: Grobler, Hermanus Johannes Fourie
  • Date: 2010
  • Subjects: Dorper sheep -- Breeding -- Namibia , Sheep -- Breeding -- Namibia , Dorper sheep , Sheep breeds
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:10733 , http://hdl.handle.net/10948/1545 , Dorper sheep -- Breeding -- Namibia , Sheep -- Breeding -- Namibia , Dorper sheep , Sheep breeds
  • Description: The study aims to determine the contribution made by available ram growth- and breed standard parameters on the sale price of auctioned rams in Namibia. These findings serve as an indication of the importance ram buyers place on individual parameters in selecting rams for breeding purposes. It furthermore tries to establish whether scientific measurement for the estimation of ram breeding values takes precedence over subjective appraisal. The analysis of the 100 day and 270 day growth performance of the progeny of selected Veldram tested rams were used to evaluate the accuracy of the estimation of ram breeding values and may serve to validate the proper execution of these Veldram tests.
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  • Date Issued: 2010

Viability study of an ethnic cosmetic retailer in Port Elizabeth

  • Authors: Rose, Grant
  • Date: 2010
  • Subjects: Cosmetics industry -- South Africa -- Port Elizabeth , Ethnic groups -- Health and hygiene -- South Africa , Market surveys -- South Africa -- Port Elizabeth
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:8603 , http://hdl.handle.net/10948/1625 , Cosmetics industry -- South Africa -- Port Elizabeth , Ethnic groups -- Health and hygiene -- South Africa , Market surveys -- South Africa -- Port Elizabeth
  • Description: The primary objective of this study is to determine the viability of opening a speciality top end, Ethnic cosmetic and toiletry retailer in the Greenacres Mall of Port Elizabeth, in order to meet the cosmetic and toiletry needs of Ethnic consumers, having moved from rural places of work and dwelling, to urban areas of work and dwelling. In order to achieve the above mentioned primary objective, the following secondary objectives will be pursued: • To investigate the current and forecast Ethnic cosmetic and toiletry trends in the United States of America, in order to serve as a benchmark in the development of a top end, speciality Ethnic cosmetic and toiletry retail store model, for the Greenacres Shopping Mall in Port Elizabeth, South Africa; • to identify whether a top end, speciality Ethnic cosmetic and toiletry store model for the Greenacres Shopping Mall in Port Elizabeth, South Africa, would be a viable business venture; • to investigate current and forecast Ethnic cosmetic and toiletry trends in South Africa, in order to reveal the shortfalls of retailers targeting this market segment; and • to identify the best business model for an organisation or individual wanting to grow their business through targeting the Ethnic cosmetic and toiletry consumer
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  • Date Issued: 2010

Vice-Chancellor's welcoming address 2010

  • Authors: Badat, Saleem
  • Date: 2010
  • Language: English
  • Type: text
  • Identifier: vital:7590 , http://hdl.handle.net/10962/d1006581
  • Description: From introduction: Rhodes University, which means, you and I and academics and support staff, exists to serve three purposes. The first is to produce knowledge, so that we can advance understanding of our natural and social worlds and enrich our accumulated scientific and cultural heritage. As a university our second purpose is to disseminate knowledge and to cultivate minds. Our goal is to ensure that you can think imaginatively, “effectively and critically”; that you “achieve depth in some field of knowledge”; that you can critique and construct alternatives, that you can communicate cogently, orally and in writing, and that you have a “critical appreciation of the ways in which we gain knowledge and understanding of the universe, of society, and of ourselves” Our final purpose as a university is to undertake community engagement. On the one hand this involves your voluntary participation in community projects undertaken thorough our Community Engagement office. On the other hand, it involves service-learning, in which through your academic courses you take part “in activities where both the community” and you benefit, “and where the goals are to provide a service to the community and, equally, to enhance (your) learning through rendering this service”
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  • Date Issued: 2010

Visual based finger interactions for mobile phones

  • Authors: Kerr, Simon
  • Date: 2010 , 2010-03-15
  • Subjects: User interfaces (Computer systems) , Mobile communication systems -- Design and construction , Cell phones -- Software , Mobile communication systems -- Technological innovations , Information display systems , Cell phones -- Technological innovations
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4652 , http://hdl.handle.net/10962/d1006621 , User interfaces (Computer systems) , Mobile communication systems -- Design and construction , Cell phones -- Software , Mobile communication systems -- Technological innovations , Information display systems , Cell phones -- Technological innovations
  • Description: Vision based technology such as motion detection has long been limited to the domain of powerful processor intensive systems such as desktop PCs and specialist hardware solutions. With the advent of much faster mobile phone processors and memory, a plethora of feature rich software and hardware is being deployed onto the mobile platform, most notably onto high powered devices called smart phones. Interaction interfaces such as touchscreens allow for improved usability but obscure the phone’s screen. Since the majority of smart phones are equipped with cameras, it has become feasible to combine their powerful processors, large memory capacity and the camera to support new ways of interacting with the phone which do not obscure the screen. However, it is not clear whether or not these processor intensive visual interactions can in fact be run at an acceptable speed on current mobile handsets or whether they will offer the user a better experience than the current number pad and direction keys present on the majority of mobile phones. A vision based finger interaction technique is proposed which uses the back of device camera to track the user’s finger. This allows the user to interact with the mobile phone with mouse based movements, gestures and steering based interactions. A simple colour thresholding algorithm was implemented in Java, Python and C++. Various benchmarks and tests conducted on a Nokia N95 smart phone revealed that on current hardware and with current programming environments only native C++ yields results plausible for real time interactions (a key requirement for vision based interactions). It is also shown that different lighting levels and background environments affects the accuracy of the system with background and finger contrast playing a large role. Finally a user study was conducted to ascertain the overall user’s satisfaction between keypad interactions and the finger interaction techniques concluding that the new finger interaction technique is well suited to steering based interactions and in time, mouse style movements. Simple navigation is better suited to the directional keypad.
  • Full Text:
  • Date Issued: 2010

Visual technology for the autonomous learning of mathematics:

  • Authors: Linneweber-Lammerskitten, Helmut , Schäfer, Marc , Samson, Duncan
  • Date: 2010
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/140949 , vital:37931 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC20930
  • Description: This paper describes a collaborative research and development project between the University of Applied Sciences Northwestern Switzerland and Rhodes University in South Africa. The project seeks to establish, disseminate and research the efficacy and use of short video clips designed specifically for the autonomous learning of mathematics. Specific to the South African context is our interest in capitalising on the ubiquity of cellphone technology and the autonomous affordances offered by mobile learning. This paper engages with a number of theoretical and pedagogical issues relating to the design, production and use of these video clips. Although the focus is specific to the contexts of South Africa and Switzerland, the discussion is of broad applicability.
  • Full Text:
  • Date Issued: 2010

Volatility and the risk return relationship on the South African equity market

  • Authors: Mandimika, Neville
  • Date: 2010
  • Subjects: Stock exchanges , Financial risk -- South Africa , Saving and investment -- South Africa
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:1009 , http://hdl.handle.net/10962/d1002744 , Stock exchanges , Financial risk -- South Africa , Saving and investment -- South Africa
  • Description: The volatility of stock markets has important implications for investment decision making, financial stability and overall macroeconomic stability. This study examines the risk-return relationship as well as the behaviour of volatility of the South African equity markets using both aggregate, industrial level and sector level data. The study is divided into three parts. The first part investigates the behaviour of volatility in each of the industries, sectors and the benchmark series focussing on whether volatility is symmetric or asymmetric. Subsequently we investigate which, among the GARCH family of models appropriately captured the riskreturn relationship under which distributional assumption. The second part examines the riskreturn relationship on the SA stock market. The third part examines the long term trend of volatility and whether volatility significantly increases during financial crises and during major global shocks. The GARCH-M, EGARCH-M and TARCH-M models under the Gaussian, Student –t and the GED are used. The findings this study makes are as follows: firstly, there is no clear relationship between risk and return. Secondly, volatility is asymmetrical, implying that bad news has a greater effect on volatility than good news in the South African equity market. Thirdly, the TARCH-M model under the GED was found to be the most appropriate model. Fourthly, volatility increases during financial crises and major global shocks. Overall, volatility is generally not priced on the South African equity markets. Thus, both local and international investors need to consider other factors that influence returns such as skewness. The general increase in volatility during financial crises and major global shocks poses a major concern for policy makers as this may cause financial instability. Thus policy makers need to be mindful of the behaviour of volatility in the South African equity market in response to external shocks.
  • Full Text:
  • Date Issued: 2010

Wattle we do? alien eradication and the 'ecology of fear' on the fringes of a world heritage site, South Africa

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