This thesis hinges upon the acknowledgement that Fiscal Decentralisation (FD) is an important ingredient in the current modernisation of government in numerous countries. Two basic questions are addressed. Firstly, it examines why some countries are more fiscally decentralised than others and secondly, it analyses the likely effects that such a decentralisation might have on the efficiency of the State. Two complementary approaches are followed to address the first question. Firstly, an econometric model to explain FD is estimated in Chapter I. The General Government appears to respond positively to income, population density, grants, military expenditures and trade. While urbanisation shows a negative effect, no significant impact on FD was detected in the cases of ethnic diversity and income distribution. As for decentralisation in the provision of housing and health, income has a negative effect. Also housing is negatively related to population density and positively affected by urbanisation. Secondly, the cases of USA, Canada, UK, Spain, Hungary, Poland, Argentina, Mexico and Chile are put under close examination in two basic aspects. Chapter II analyses the funding mechanisms of Sub National Governments (SNGs). Chapter III focuses on those responsibilities being held by SNGs and their historical origin. Anglo-American and Spanish traditions seem to have had a major influence in the institutional evolution of some countries and the extent of their FD. Regarding the effects of FD, Chapter IV examines a range of variables to explain Government's performance. It uses a two stages procedure that combines Data Envelopment Analysis with a set of Tobit regressions. The basic conclusion is that FD does not seem to affect macroeconomic variables, but it does have a positive and significant effect on the government's provision of health and education.

This dissertation seeks to understand the factors that influence government responses to HIV/AIDS among sub-Saharan African countries. Specifically, I hypothesize that 1) under certain circumstances, countries with democratic institutions are more likely to fight the epidemic aggressively and 2) there are multiple pathways to strong government action. By examining government performance in 29 sub-Saharan African countries, I find strong support for both hypotheses. A case study of Botswana shows that various aspects of a democratic society, from the competitiveness of the political arena to an active civil society, shape government responses to HIV/AIDS.This research has both theoretical and practical implications. It contributes to the existing knowledge about the effects of democracy on public well-being by highlighting that, even in regions where democratic institutions may not be well-established, their dynamics are still powerful enough to encourage governments to adopt policies that benefit their populations. Additionally, it expands our understanding of HIV/AIDS policy-making in sub-Saharan Africa and in other areas of the world by specifying the different environments which lead governments to be aggressive in addressing the epidemic, a finding of interest to those involved in the field of development.

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The objectives of the research was to critically analyse arguments for and against agricultural trade liberalization and its impact on food security, investigating the nexus between the three pillars of agriculture and food security, considering how the Agreement on Agriculture and the Food Aid Convention addressed the concerns that were raised by the different parties during the negotiation period, and finally it considered how the current multilateral negotiations in agriculture can provide a secure framework within which developing African countries can pursue effective policies to ensure their food security.

<p>The dissertation examines three military interventions in Sub-Saharan Africa which took place in the mid and late 1990s in Rwanda, the DRC and Lesotho. These interventions took place despite high expectations of international and regional peace on the part of most analysts after the collapse of cold war in 1989. However, interstate and intrastate conflicts re-emerged with more intensity than ever before, and sub-Saharan Africa proved to be no exception.</p> <p><br /> The study sets out to analyse the motives and/or causes of military interventions in Rwanda in 1990, the DRC in 1996-7, and the DRC military rebellion and the Lesotho intervention in 1998. In analysing these interventions, the study borrows extensively from the work of dominant security theorists of international relations, predominantly realists who conceptualise international relations as a struggle for power and survival in the anarchic world. The purpose of this analysis is fourfold / firstly, to determine the reasons for military interventions and the extent to which these interventions were conducted on humanitarian grounds / secondly, to investigate the degree to which or not intervening countries were spurred by their national interests / thirdly, to assess the roles of international organisations like Southern African Development Community (SADC), the Organisation of African Unity (OAU) and the United Nations, in facilitating these interventions / as well as to evaluate the role of parliaments of intervening countries in authorising or not these military interventions in terms of holding their Executives accountable. In this context, the analysis argues that the intervening countries / Angola, Botswana, Burundi, Chad, Namibia, Rwanda, Sudan, South Africa, Uganda and Zimbabwe appeared to have used intervention as a realist foreign policy tool in the absence of authorisation from the United Nations and its subordinate bodies such as the OAU and SADC.</p>

Recent studies reflect increasing levels of HIV infection amongst married women in sub-Saharan Africa. The institution of marriage, which is highly revered within the church and society, is thus now regarded as a 'potential death trap' for many married women. This study examines the drivers of these increasing levels of HIV infection amongst married women in sub-Saharan Africa. It offers a critical reflection of the socio-cultural factors and gender-insensitive theological traditions that expose married women to the vulnerability of HIV infection. In order to observe the sacrosanctity of the marriage institution as well as preserving the dignity of life for many married women in sub-Saharan Africa, the study presents the imago Dei theological motif as a gender-sensitive theological response to the increasing levels of HIV infection among married women. The imago Dei theological motif argues that both men and women equally reflect the divine image of God. This theological motif also brings to the fore the realization that HIV and AIDS is fuelled by conditions of inequality, socio-economic and socio-cultural discrimination, hence the need to promote human dignity for both men and women within our communities in sub-Saharan Africa. Furthermore, emanating from the imago Dei theological motif, the study offers a bold community praxis through the transformation of gender-insensitive theological traditions; the transformation of hegemonic masculinities; and the transformation of gender-insensitive HIV prevention models as practical ways aimed at redressing the vulnerability of married women to the increasing levels of HIV infection. / Thesis (M.A.)-University of KwaZulu-Natal, Pietermaritzburg, 2012.

Spectrum sensing is the process of identifying the frequencies of a spectrum in which Signals Of Interest (SOI) are present. In case of continuous time signals present in a wideband spectrum, the information rate is seen to be much less than that suggested by its bandwidth and are therefore known as sparse signals. A review of the literature in [1] and [2] indicates that two of the many techniques used in wideband spectrum sensing of sparse signals are the Wideband Compressive Radio Receiver (WCRR) for multitoned signals and the mixed analog digital system for multiband signals. In both of these techniques even though the signals are sampled at sub-Nyquist rates using Compressive Sampling (CS), the recovery algorithms used by them are different from that of CS. In WCRR, a simple correlation function is used for the detection of carrier frequencies and in a mixed analog digital system, a simple digital algorithm is used for the identification of frequency support. Through a literature survey, we could identify that a VHSIC hardware descriptive ModelSim simulation model for wideband spectrum sensing of multitoned and multiband signals using sub Nyquist sampling does not exist. If a ModelSim simulation model can be developed using VHDL codes, it can be easily adapted for FPGA implementation leading to the development of a realistic hardware prototype for use in Cognitive Radio (CR) communication systems. The research work reported through this dissertation deals with the implementation of simulation models of WCRR and mixed analog digital system in ModelSim by making use of VHDL coding. Algorithms corresponding to different blocks contained in the conceptual design of these models have been formulated prior to the coding phase. After the coding phase, analyses of the models are performed using test parameter choices to ensure that they meet the design requirements. Different parametric choices are then assigned for the parametric study and a sufficient number of iterations of these simulations were carried out to verify and validate these models. / MIng (Computer and Electronic Engineering), North-West University, Potchefstroom Campus, 2014

Circumstellar disks are critical structures in the star and planet formation processes, as they provide a conduit to channel material onto the central object and supply a reservoir of dust and gas to form planets. This thesis focuses on the far-infrared, and sub-millimeter observations of circumstellar disks at two key evolutionary phases; pri- mordial proto-planetary disks, and evolved debris disks – remnants of a system that has undergone a degree of planet formation. Four individual studies of circumstellar disks are presented in this thesis. The results of a 97% complete census of far-infrared emission measured with the Herschel Space Observatory, targeting stars of spectral types M4 and later, in the Taurus molecular cloud are presented. This census is the first large-scale survey sensitive to emission across the stellar and sub-stellar boundary. Results from an initial test grid of model spectral energy distributions, generated with the radiative transfer code MCFOST, show that 73% of the observed Class II population are constrained by canonical disks that are viewed from face-on to edge-on inclinations. Sub-millimeter observations with the Caltech Sub-millimeter Observatory are presented for an association of young T-Tauri stars in the Aquila star-forming region. The results of disk frequency and disk mass of this complete census are investigated in this extremely low stellar density environment. A sub-millimeter investigation for two populations of candidate debris disk; warm and cold excess disks is presented. None of the candidate disks were detected in the sub-millimeter despite upper-limits below that expected, based on blackbody model fits to excesses at shorter wavelengths. Several scenarios are investigated in order to identify the null detection rate, such as stellar multiplicity and background-source contamination. Finally, a partially resolved sub-millimeter map of the debris disk around the HR 8799 multiple planetary system is presented. The planet formation history of the system is investigated through the witnessed morphology of the emission.