A time-dependent two-dimensional (2D) modulation model including drifts, the solar wind tennination shock (TS) with diffusive shock acceleration and a heliosheath based on the Parker (1965) transport equation is used to study the modulation of galactic cosmic rays (GCRs) and the anomalous component of cosmic rays (ACRs) in the heliosphere. In particular, the latitude dependence of the TS compression ratio and injection efficiency of the ACRs (source strength) based on the hydrodynamic modeling results of Scherer et al. (2006) is used for the first time in a modulation model. The subsequent effects on differential intensities for both GCRs and ACRs are illustrated, comparing them to the values without a latitude dependence for these parameters. It is found that the latitude dependence of these parameters is important and that it enables an improved description of the modulation of ACRs beyond the TS. With this modeling approach (without fitting observations) to the latitude dependence of the two parameters, it is possible to obtain a TS spectrum for ACRs at a polar angle of B = 55" that qualitatively approximates the main features of the Voyager 1 observations. This positive result has to be investigated further. Additionally, it is shown that the enhancement of the cosmic ray intensity just below the cut-off energy found for the ACR at the TS in an A < 0 magnetic polarity cycle in the equatorial plane with the latitude independent scenario, disappears in this region when the latitude dependence of the compression ratio and injection efficiency is assumed. Subsequent effects of these scenarios are illustrated on the global anisotropy vector of both GCRs and ACRs as the main theme of this work. For this purpose the radial and latitudinal gradients for GCRs and ACRs were accurately computed. The radial and latitudinal anisotropy components were then computed as a function of energy, radial distance and polar angle. It is also the first time that the anisotropy vector is comprehensively calculated in such a global approach to cosmic ray modeling in the heliosphere, in particular for ACRs. It is shown that the anisotropy vector inside (up-stream) and outside (down-stream) the TS behaves in a complicated way, so care must be taken in interpreting it. It is found that the latitude dependence of the two mentioned parameters can alter the direction (sign) of the anisotropy vector. Its behaviour beyond the TS is markedly different from inside the TS, mainly because of the slower solar wind velocity, with less dependence on the magnetic polarity cycles. / Thesis (M.Sc. (Physics))--North-West University, Potchefstroom Campus, 2007.

The primary aim of this investigation is to focus on the delivering of pre-abortion counselling from a social work perspective. The importance of delivery of pre abortion counselling with regard to the pregnant woman, who is considering the termination of a pregnancy, is accentuated on the one hand. On the other hand, the focus is on making social workers aware of becoming involved in abortion-related services. The thesis consists of five Sections: SECTION A This section indicates the actuality of the research, namely a study of pre-abortion counselling according to which four research questions are formulated. The overarching research aim and four research objectives are discussed in the section. This research takes on the intervention research model within the combined qualitative and quantitative research approach. The survey procedure was utilized in two different manners to wit the single-system design and mailed questionnaires. The data which was captured during thorough interviews was processed computer-wise as well as by hand. SECTION B This section was presented in the form of four articles in which the research finding were reported. AU four articles form part of the all-embracing research aims and objectives and of the entire research project. However, every article is a sub-project of the entire research project because it also acts independently - each with a distinctive problem statement, research aim and objectives, research methods and distinctive content. Section B consists of the following articles: Article 1 discusses abortion as a moral dilemma in South Africa and points out that there are still unanswered questions with regard to this acute subject that is as old as mankind. In Article 2 the living space of the pregnant woman who requests the termination of a pregnancy is discussed with the accent on the necessity for the understanding of such a woman who finds herself in a crisis situation, in order to deliver an effective social work service. The importance of pre-abortion counselling with crisis intervention as the proper model is discussed in Article 3. And as indicated that delivering pre-abortion counselling to the pregnant woman who requests the termination of a pregnancy is essential for the decision-making process but also with regard to her future. Article 4 discusses the opinion of social workers concerning the delivery of pre-abortion counselling. 'The social worker as a pre-abortion counsellor, and who forms part of the multi-professional team receives priority attention here. SECTION C In Section C, the conclusions and recommendations with regard to this research is explained. The limitations of this study are indicated, and recommendations are made with a view to its utilisation in theory and in practice as well as for training and research SECTION D AU addendum that are referred to in the thesis are contained in this section. SECTION E Although each article has its own source list, a combined source list of the entire research project is presented in this section. / Thesis (Ph.D. (Social Work))--North-West University, Potchefstroom Campus, 2005.

No description available.

Countries that have experienced civil war suffer a greater risk for new conflict than countries with no prior history of civil war. This empirical finding has been called a conflict trap where the legacy of previous war - unsolved issues, indecisive outcomes, and destruction – leads to renewed fighting. Yet, countries like Cambodia, El Salvador, Indonesia, and Mozambique have managed to overcome decade-long conflicts without relapse. This dissertation addresses this empirical puzzle by seeking to dismantle the conflict trap and look at microlevel explanations for civil war resolution and relapse. It adds to existing scholarship in three ways: first, by using disaggregated empirics on war termination and how fighting resumes; second, by exploring government agency in conflict processes; and third, by disaggregating rebel organizations. Essay I present original data on the start and end dates and means of termination for all armed conflicts, 1946-2005. Contrary to previous work, this data reveal that wars does not always end through victory or peace agreement, but commonly end under unclear circumstances. Essay II addresses how developments exogenous to the conflict influence governments’ decision to engage in a peace process. The results show that after natural disasters when state resources need to be allocated towards disaster relief, governments are more willing to negotiate and conclude ceasefires with insurgents. Essay III focuses on the post-conflict society, and posits that security concerns among former war participants will push them towards remobilizing into rebellion. The findings indicate that if ex-belligerent elite’s security is compromised, the parties of the previous war will resume fighting, while insecurity among former rank-and-file leads to the formation of violent splinter rebel groups. Finally, Essay IV seeks to explain why governments sometimes launch offensives on former rebels in post-conflict countries. The results show that internal power struggles provide leaders with incentives to use force against domestic third parties to strengthen their position against intra-government rivals. Taken together, this dissertation demonstrates that there is analytical leverage to be had by disaggregating the processes of violence in civil war and post-conflict societies, as well as the actors involved – both the government and rebel sides.

A time-dependent two-dimensional (2D) modulation model including drifts, the solar wind tennination shock (TS) with diffusive shock acceleration and a heliosheath based on the Parker (1965) transport equation is used to study the modulation of galactic cosmic rays (GCRs) and the anomalous component of cosmic rays (ACRs) in the heliosphere. In particular, the latitude dependence of the TS compression ratio and injection efficiency of the ACRs (source strength) based on the hydrodynamic modeling results of Scherer et al. (2006) is used for the first time in a modulation model. The subsequent effects on differential intensities for both GCRs and ACRs are illustrated, comparing them to the values without a latitude dependence for these parameters. It is found that the latitude dependence of these parameters is important and that it enables an improved description of the modulation of ACRs beyond the TS. With this modeling approach (without fitting observations) to the latitude dependence of the two parameters, it is possible to obtain a TS spectrum for ACRs at a polar angle of B = 55" that qualitatively approximates the main features of the Voyager 1 observations. This positive result has to be investigated further. Additionally, it is shown that the enhancement of the cosmic ray intensity just below the cut-off energy found for the ACR at the TS in an A < 0 magnetic polarity cycle in the equatorial plane with the latitude independent scenario, disappears in this region when the latitude dependence of the compression ratio and injection efficiency is assumed. Subsequent effects of these scenarios are illustrated on the global anisotropy vector of both GCRs and ACRs as the main theme of this work. For this purpose the radial and latitudinal gradients for GCRs and ACRs were accurately computed. The radial and latitudinal anisotropy components were then computed as a function of energy, radial distance and polar angle. It is also the first time that the anisotropy vector is comprehensively calculated in such a global approach to cosmic ray modeling in the heliosphere, in particular for ACRs. It is shown that the anisotropy vector inside (up-stream) and outside (down-stream) the TS behaves in a complicated way, so care must be taken in interpreting it. It is found that the latitude dependence of the two mentioned parameters can alter the direction (sign) of the anisotropy vector. Its behaviour beyond the TS is markedly different from inside the TS, mainly because of the slower solar wind velocity, with less dependence on the magnetic polarity cycles. / Thesis (M.Sc. (Physics))--North-West University, Potchefstroom Campus, 2007.

The primary aim of this investigation is to focus on the delivering of pre-abortion counselling from a social work perspective. The importance of delivery of pre abortion counselling with regard to the pregnant woman, who is considering the termination of a pregnancy, is accentuated on the one hand. On the other hand, the focus is on making social workers aware of becoming involved in abortion-related services. The thesis consists of five Sections: SECTION A This section indicates the actuality of the research, namely a study of pre-abortion counselling according to which four research questions are formulated. The overarching research aim and four research objectives are discussed in the section. This research takes on the intervention research model within the combined qualitative and quantitative research approach. The survey procedure was utilized in two different manners to wit the single-system design and mailed questionnaires. The data which was captured during thorough interviews was processed computer-wise as well as by hand. SECTION B This section was presented in the form of four articles in which the research finding were reported. AU four articles form part of the all-embracing research aims and objectives and of the entire research project. However, every article is a sub-project of the entire research project because it also acts independently - each with a distinctive problem statement, research aim and objectives, research methods and distinctive content. Section B consists of the following articles: Article 1 discusses abortion as a moral dilemma in South Africa and points out that there are still unanswered questions with regard to this acute subject that is as old as mankind. In Article 2 the living space of the pregnant woman who requests the termination of a pregnancy is discussed with the accent on the necessity for the understanding of such a woman who finds herself in a crisis situation, in order to deliver an effective social work service. The importance of pre-abortion counselling with crisis intervention as the proper model is discussed in Article 3. And as indicated that delivering pre-abortion counselling to the pregnant woman who requests the termination of a pregnancy is essential for the decision-making process but also with regard to her future. Article 4 discusses the opinion of social workers concerning the delivery of pre-abortion counselling. 'The social worker as a pre-abortion counsellor, and who forms part of the multi-professional team receives priority attention here. SECTION C In Section C, the conclusions and recommendations with regard to this research is explained. The limitations of this study are indicated, and recommendations are made with a view to its utilisation in theory and in practice as well as for training and research SECTION D AU addendum that are referred to in the thesis are contained in this section. SECTION E Although each article has its own source list, a combined source list of the entire research project is presented in this section. / Thesis (Ph.D. (Social Work))--North-West University, Potchefstroom Campus, 2005.

In a recent judgment by the Free State Provincial Division of the High Court of South Africa it was decided that a trustee who resigns is only relieved from his duties when his name is removed from the letter of authority by the Master of the High Court. This judgment has caused many questions to be raised regarding the implications of the resignation by a trustee. This judgment and the current legal position of the resigning trustee are investigated in this dissertation. The legal position of the resigning trustee seems to be uncertain, and the mentioned judgment should not be unreservedly accepted as correct. The role and responsibility of the Master of the High Court in this process is considered, as well as the legal position of the resigning trustee, the remaining trustees and third parties contracting with the trust. Certain conclusions are drawn and recommendations are made regarding this aspect of South African trust law. / Thesis (LL.M. (Estate Law))--North-West University, Potchefstroom Campus, 2009.

In a recent judgment by the Free State Provincial Division of the High Court of South Africa it was decided that a trustee who resigns is only relieved from his duties when his name is removed from the letter of authority by the Master of the High Court. This judgment has caused many questions to be raised regarding the implications of the resignation by a trustee. This judgment and the current legal position of the resigning trustee are investigated in this dissertation. The legal position of the resigning trustee seems to be uncertain, and the mentioned judgment should not be unreservedly accepted as correct. The role and responsibility of the Master of the High Court in this process is considered, as well as the legal position of the resigning trustee, the remaining trustees and third parties contracting with the trust. Certain conclusions are drawn and recommendations are made regarding this aspect of South African trust law. / Thesis (LL.M. (Estate Law))--North-West University, Potchefstroom Campus, 2009.

With the continuous growth of non-linear power electronic components and the increasing penetration of the distributed generation (DG), the potential for degradation in the power quality of the existing grid exists. There are concerns that the total harmonic distortion (THD) could reach unacceptable levels of 5% or higher. Moreover, there is additional potential of the presence of amplified harmonic components in the power network grid when the harmonic frequencies align with the resonant frequencies that are being injected by power electronic components of the DG. The above conditions could increase the electrical stresses on the insulation system of the power system components, and in particular, cable terminations are a concern. Standard cable terminations are designed to operate under power frequency in the power system network and their service life is considered accordingly. The research work aims to provide an understanding of the performance of the stress grading (SG) system of a commercial cable termination when the voltage waveform is distorted due to the presence of harmonics and when the high frequency and high dV/dt voltage waveforms are present from a typical power electronic drive. An aging experiment was performed for over a 600 hour time period using the pulse width modulated (PWM) high-voltage generator to quantify the impact of high frequency stress on SG system of cable termination. Furthermore, the cable termination was tested under power frequency, distorted voltage waveforms composed of fundamental and low order harmonics using an experiment setup that generate distorted voltage waveforms. Diagnostic techniques such as surface potential distribution measurements and surface temperature monitoring are used to analyze the termination performance. The surface tangential field is calculated based on the gradient of the termination surface potential as measured with an electrostatic voltmeter. The study shows that distorted voltage waveforms with high frequency and high dV/dt components, increase the electric field, resistive heating, and surface temperature rise in the terminations that use the field-dependent SG materials. The rise of electric field by as high as 27.1% and surface temperature rise of as high as 17C demonstrates the severity on the cable terminations. Such electric field enhancements for a period of time have a potential to initiate partial discharge that could lead to degradation of the termination. Moreover, surface temperature rise of 17 deg C could reduce the allowable ampacity of the cable conductor, reduce the short circuit levels, and reduce the feeder loading limits. The field-dependent electrical conductivity (σ(E,T)), permittivity (ε), and the temperature dependencies of (σ(E,T) and ε) have strong impact to degrade the electrical and thermal properties of the termination due to stress from the non-sinusoidal distorted voltage waveform. In order to minimize the surface temperature rise from the hotspot and electrical stress enhancement that eventually lead to insulation degradation and failure, the following recommendations are made for a suitable SG design for a termination to handle the severe voltage stress: Apply the capacitively graded termination in the grid where the distortion levels are low. Under the increased total harmonic distortion levels and HF components, resistively grading with higher degree of nonlinearity (achieved through the use of ZnO filler) is beneficial. The utilities could take preventive maintenance on medium voltage power cable accessories to prevent the termination failure before it actually occurs. Researchers could focus to resolve and minimize the rising power quality issues when the distribution generations are operated, improve the power electronic converters, and provide cost-effective harmonic filter solutions for harmonic mitigation.

Typescript. Includes vita and abstract. Includes bibliographical references (leaves 391-413). Also available online in Scholars' Bank; and in ProQuest, free to University of Oregon users.