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Thesis (Ph. D.)--North Carolina State University, 2004. / Includes vita. Includes bibliographical references (p. 103-109). Also issued online.

The first comprehensive phylogeny of the family Curtonotidae is presented based on molecular markers and morphology. This enabled assessment of evolutionary relatedness, species radiation and zoogeography. A revised classification of the world fauna of the family, based on the results of this study is outlined. Nomenclatural acts flowing from these analyses include: the recognition three new Afrotropical species of Axinota van der Wulp; four new species of a new genus, Tigrisomyia Kirk-Spriggs; and nineteen new species of Curtonotum (six Madagascan and thirteen African). Ten informal species-groups of Curtonotum are recognised. Identification keys are provided for the Afrotropical species of these genera and errors in previous interpretations and designation of type specimens are resolved. Species distributions are mapped and interpreted and discussion is made of the historical biogeographical significance of these distributions.

The crystal structure of Ba [Cu(C₂0₄)₂(H₂O)].5H₂O has been determined using single crystal X-ray diffractometry. It crystallises in the triclinic system, space group Pī , with a = 6.539(2) Å, b = 9.211(3) Å, c = 10.928(3) Å, a = 85.42(3)°, β = 79.22(3)° , γ = 80.30(3)°, V = 636.08(8)ų and Z = 2. The structure consists of [Cu(C₂0₄)₂(H₂O)]²⁻ ions weakly bridged by barium ions and water molecules. The copper(II) ions are in a tetragonally elongated square-pyramidal environment with some trigonal distortion. The two oxalate groups occupy the equatorial positions and a water molecule occupies the axial position. The barium ion is surrounded by nine oxygens: five oxygens from water molecules and four oxygens from oxalate groups. The thermal behaviour of Ba [Cu(C₂0₄)₂(H₂O)].5H₂0 in N₂ has been examined using thermogravimetry (TG) and differential scanning calorimetry (DSC). The dehydration starts at relatively low temperatures (~80°C), but continues until the onset of the decomposition (~280°C). The decomposition takes place in two major stages. The mass of the intermediate after the first stage corresponded to the formation of barium oxalate and copper metal and, after the second stage, to the formation of barium carbonate and copper metal. The enthalpy for the dehydration was found to be 311 ±30 kJ mol⁻¹. The overall enthalpy change for the decomposition of Ba[Cu(C₂0₄)₂]in N₂ was estimated from the combined area of the peaks of the DSC curve as -347 kJ mol⁻¹. The kinetics of the thermal dehydration and decomposition were studied using isothermal TG. The dehydration was strongly deceleratory and the α-time curves could be described by the three-dimensional diffusion (D3) model. The values of the activation energy and the pre-exponential factor for the dehydration were 125 ±4 kJ mol⁻¹ and (1.38 ±0.08)x10¹⁵ min⁻¹, respectively. The decomposition was complex, consisting of at least two concurrent processes. The decomposition was analysed in terms of two overlapping deceleratory processes. One process was fast and could be described by the contracting-geometry model with n = 5. The other process was slow and could also be described by the contracting-geometry model , but with n = 2. The values of Eₐ and A were 206 ±23 kJ mol⁻¹ and (2.2 ±O.5)xl0¹⁹min⁻¹, respectively, for the fast process, and 259 ±37 kJ mol⁻¹ and (6.3 ±1.8)x10²³min⁻¹, respectively, for the slow process.The crystal structure of zinc oxalate dihydrate ([Zn(C₂0₄)(H₂O)₂]n) has also been determined by X-ray diffraction methods. It crystallises in the monoclinic system, space group C2/c with a = 11.786(2) Å, b = 5.397(1)Å, c = 9.712(1) Å, B = 126.19(5)°, V = 498.58(8)ų, Z = 4 and R = 0.037 for 435 absorption-corrected independent reflections and 50 parameters. The asymmetric unit consists of half the monomeric unit [Zn(C₂0₄)(H₂O)₂). The structure consists of infinite, linear chains of zinc ions bridged by oxalate groups. The geometry of the coordination polyhedron surrounding the zinc ion is octahedral, with the oxalate oxygens occupying the equatorial positions and water molecules occupying the axial positions.

This study explored the reasoning process of interpreters during the process of early recollection (ER) interpretation, and in the identification of central life style theme using Mosak's typology system (1971). ERs from ten subjects were collected using a guestionnaire format and distributed to six interpreters. Three interpreters were experienced in ER interpretation and three received two hours of training in ER interpretation prior to the study. All interpreters were requested to record their impressions and thoughts during the interpretive process on audio tape for later analysis, and to assign a primary and secondary life style theme to each subject using Mosak's typologies. The results of this study provided information about the cues found in ERs that seem to guide interpreters, the effect of interpreter style on the final outcome, and the reliability of inter-judge agreement on life style theme from ER interpretation. The results showed that training in ER interpretation immediately provided the trainees with an ability to identify the perceptual schema of the subjects but it did not give them the same skill possessed by the experienced clinicians in metaphor analysis or an understanding of Mosak's typology system. Similarities and differences between the experienced clinicians and the trainees were analyzed. / Education, Faculty of / Educational and Counselling Psychology, and Special Education (ECPS), Department of / Graduate

Submitted in fulfilment of the degree of Doctor of Philosophy (PhD) in Bioethics and Health Law, Steve Biko Centre for Bioethics, University of the Witwatersrand. Johannesburg, November 2014 / Vulnerability, an abstract concept in health research, has concrete effects both on those who are labelled vulnerable and those who are not. It has been used increasingly as an exclusion criterion in research but has been the least examined from an ethical perspective despite being linked in most research ethics guidelines and codes, both international and local, to questions of justice and informed consent. Neither has there been an agreed upon standard for identifying and responding to vulnerability. The guidelines, despite categorizing vulnerable research participants into groups and subpopulations, do not offer a robust and comprehensive definition of vulnerability. The study aimed to analyse the notion of vulnerability in health research with a view to constructing an operational definition of the concept which would assist researchers and RECs to identify and understand vulnerabilities and strategize on maximizing protections for the participants without obstructing essential research. Using normative, metaethical and historical methods of bioethical inquiry, this research has shown that the categorization of people into vulnerable groups is not justified as it could result in obstructing research, and paternalistically excluding participants from necessary research, or inadequately protecting participants enrolled in research. The study has resulted in an appropriate operational definition of vulnerability and a Vulnerability Assessment Scale being developed to assist Research Ethics Committees and researchers identify participants with vulnerabilities and develop focused safeguards for their protections. The concept of vulnerability in health research is no longer nebulous and vague and its definition is therefore no longer an unanswered question.

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Published Article / In their research as well as their teaching, universities of technology (UoTs) expect to be infused by the application of technology and to be integrally related to the world of work. At the same time, research at UoTs is characteristically innovatory, in the specific sense of transforming research discoveries into products or services that are user-oriented and commercially viable. Since practical problems and user needs do not respect disciplinary boundaries it follows, firstly, that such research at a UoT will in some sense not respect disciplinary boundaries, i.e. it will have to connect, cross, or integrate traditional disciplines. This paper seeks accordingly conceptually to differentiate the relevant senses of multi-, inter- and trans-disciplinary (MIT) research. It then characterises the fourteen current research programmes at Central University of Technology (CUT) in these regards, comparing the findings from interviews with the programme leaders with the insights of the authors. Secondly, in that most research at UoTs is also expected to be innovatory, it is demanded of researchers that they also master the skill of researching the feasible applications of findings, developing products, and envisaging commercialisation; and handing the stakeholder relationships that arise in these interactions. The interviews further indicate the extent to which the respective programmes have moved down the MIT road. They also reveal that the challenges that are faced by the programmes are overwhelming generic rather than specifically MIT-related. Some strategic recommendations are extracted from the findings.