Eskom is under increasing pressure to provide reliable and sustainable electricity. Demand Side Management (DSM), offers a short– to medium–term solution to this problem. During 2009, the mining sector consumed approximately 16% of the domestic electricity supplied by Eskom. This made the mining sector one of the major targets for Eskom–initiated DSM programmes. The mining industry uses compressed air for a wide variety of applications and production purposes. This creates many opportunities to reduce electricity consumption and operating costs. Reducing the airsystem demand may however not result in significant electrical energy savings, unless the compressed–air supply is accurately managed to meet the reduced demand. Until recently, compressor control in the mining sector generally consisted of operating the compressors continuously, regardless of the actual demand for compressed air. Excessive compressed air is blown off into the atmosphere resulting in energy loss. This usually occurs when the compressors are operated manually. A computer–controlled compressor management solution, which optimises the efficiency potential of the compressed–air supply, is required to obtain significant electrical energy savings. The need for such a solution was addressed by the development of an energy management solution for mine compressor systems. This solution is referred to as Energy Management System (EMS) and is capable of starting, stopping, loading and unloading compressors. In addition to this, compressor output can be controlled to maintain a desired pressure set–point. In this study, the development and implementation of EMS on ten different mine compressor systems is presented. Automatic compressor capacity control was implemented, while an operator manually initiated compressor starting; stopping; loading and unloading, according to EMS control schedules. Centralised compressor control is one of the main advantages offered by EMS, especially for compressed–air systems with multiple compressor systems at different geographic locations. EMS facilitated effective and sustainable electrical energy reductions for all these compressed–air systems. / Thesis (M. Ing. (Computer and Electronical Engineering))--North-West University, Potchefstroom Campus, 2011.

This research examines the sustainability of private sector participation in urban service delivery in developing countries. The solid waste collection service in Dar es Salaam – Tanzania was used as a case study. Municipalities in Tanzania have not been able to cope with the rapid generation rate of solid waste coupled by the rapid urbanization. This resulted in a relatively large quantity of solid waste remaining poorly managed and uncollected, which left an obvious gap for other stakeholders to participate in service provision. The private sector took the opportunity, in the early 1960s, to fill the gap left by the public sector in service provision. The research found that there are factors affecting the sustainability of the private sector, which include: support from the public sector; capacity from the private sector in terms of collection vehicles and equipment; households’ attitudes and behaviour regarding the privatization of the service; the awareness and participation of households in the service; and involvement of households in decision-making. The research also identified that there is a missing-link between the households, public sector administration and the private sector. The research concludes that, taking into consideration the above factors, the proposed guidelines formulated in this study illustrate ways in which private sector involvement in solid waste collection in urban developing countries will be sustainable.

Thesis (Ph.D.)--University of Tulsa, 1993. / Includes bibliographical references (leaves 86-92).

Thesis (Ph.D.)--University of Tulsa, 1993. / Includes bibliographical references (leaves 86-92).

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-10T00:04:44Z No. of bitstreams: 1 ThiagoDeOliveiraAlvesRocha_TESE.pdf: 3728978 bytes, checksum: e47856c08795ec056c30763c0e338dad (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-10T23:32:23Z (GMT) No. of bitstreams: 1 ThiagoDeOliveiraAlvesRocha_TESE.pdf: 3728978 bytes, checksum: e47856c08795ec056c30763c0e338dad (MD5) / Made available in DSpace on 2016-06-10T23:32:23Z (GMT). No. of bitstreams: 1 ThiagoDeOliveiraAlvesRocha_TESE.pdf: 3728978 bytes, checksum: e47856c08795ec056c30763c0e338dad (MD5) Previous issue date: 2015-12-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Os sistemas de gera??o, que utilizam fontes renov?veis, est?o se tornando cada vez mais populares devido ? necessidade do incremento do uso da energia el?trica. Atualmente, as fontes renov?veis cooperam com a gera??o convencional, em decorr?ncia da limita??o do sistema na entrega da pot?ncia requerida, da necessidade da redu??o dos efeitos indesejados das fontes que utilizam combust?veis fosseis (polui??o) e a dificuldade de constru??o de novas linhas de transmiss?o e/ou distribui??o. Esta coopera??o se d? por meio da gera??o distribu?da. Desta forma, neste trabalho s?o propostas contribui??es para o sistema de controle utilizado para a interconex?o de sistemas PV (do ingl?s, Photovoltaic) de gera??o distribu?da com a rede el?trica trif?sica, por meio de filtros de conex?o do tipo LCL. A compensa??o da qualidade de energia no ponto de acoplamento comum (PAC) ? realizada garantindo-se que a rede el?trica forne?a, ou consuma apenas pot?ncia ativa e que suas correntes possuam baixo teor harm?nico. Diferentemente das t?cnicas tradicionais, que necessitam de esquemas para a detec??o harm?nica, a t?cnica utilizada realiza a compensa??o harm?nica sem a utiliza??o desses esquemas, controlando as correntes de sa?da do sistema de uma forma indireta. Para que haja um efetivo controle da tens?o do barramento CC (Corrente Cont?nua) ? utilizado o controlador robusto em modo dual DSM-PI (Proporcional Integral Dual em Modo Deslizante), que durante o transit?rio se comporta como um controlador em modo deslizante SM-PI (Proporcional Integral em Modo Deslizante), e em regime permanente se comporta como um PI (Proporcional Integral) convencional. Para o controle das correntes ? utilizado a estrat?gia de controle repetitivo, onde s?o utilizados controladores de dupla sequ?ncia (DSC) sintonizados na componente fundamental, no quinto e no s?timo harm?nico. As correntes de refer?ncia s?o alinhadas ao ?ngulo de fase do vetor tens?o da rede el?trica, obtido a partir do uso de um SRF-PLL (do ingl?s, Synchronous Reference Frame Phase-Locked-Loop). Com o intuito de obter a m?xima pot?ncia do array fotovoltaico ? utilizado um algoritmo de MPPT (do ingl?s, Maximum Power Point Tracking) sem a necessidade de adi??o de sensores. Resultados experimentais s?o apresentados para demonstrar a efic?cia do sistema de controle proposto. / Generation systems, using renewable sources, are becoming increasingly popular due to the need for increased use of electricity. Currently, renewables sources have a role to cooperate with conventional generation, due to the system limitation in delivering the required power, the need for reduction of unwanted effects from sources that use fossil fuels (pollution) and the difficulty of building new transmission and/or distribution lines. This cooperation takes place through distributed generation. Therefore, this work proposes a control strategy for the interconnection of a PV (Photovoltaic) system generation distributed with a three-phase power grid through a connection filter the type LCL. The compensation of power quality at point of common coupling (PCC) is performed ensuring that the mains supply or consume only active power and that his currents have low distorcion. Unlike traditional techniques which require schemes for harmonic detection, the technique performs the harmonic compensation without the use of this schemes, controlling the output currents of the system in an indirect way. So that there is effective control of the DC (Direct Current) bus voltage is used the robust controller mode dual DSMPI (Dual-Sliding Mode-Proportional Integral), that behaves as a sliding mode controller SM-PI (Sliding Mode-Proportional Integral) during the transition and like a conventional PI (Proportional Integral) in the steady-state. For control of current is used to repetitive control strategy, which are used double sequence controllers (DSC) tuned to the fundamental component, the fifth and seventh harmonic. The output phase current are aligned with the phase angle of the utility voltage vector obtained from the use of a SRF-PLL (Synchronous Reference Frame Phase-Locked-Loop). In order to obtain the maximum power from the PV array is used a MPPT (Maximum Power Point Tracking) algorithm without the need for adding sensors. Experimental results are presented to demonstrate the effectiveness of the proposed control system.

Simulation is one approach to analyze and model the real world complex problems. Multi-agent based systems provide a platform to develop simulations based on the concept of agent-oriented programming. In multi-agent systems, the local interaction between agents contributes to the emergence of the global phenomena by getting the result of the simulation runs. In MABS systems, interaction is one common aspect for all agents to perform their tasks. To interact with each other the agents require yellow page services from the platform to search for other agents. As more and more agents perform searches on this yellow page directory, there is a decrease in the performance due to a central bottleneck. In this thesis, we have investigated multiple solutions for this problem. The most promising solution is to integrate distributed shared memory with the directory systems. With our proposed solution, empirical analysis shows a statistically significant increase in performance of the directory service. We expect this result to make a considerable contribution to the state of the art in multiagent platforms.

This study was designed to assess the reliability of the "Psychological Rating Scale for Diagnostic classification as an instrument for determining diagnoses consistent with DSM-III criteria and nomenclature. Pairs of raters jointly interviewed a total of 50 hospital patients and then independently completed the 70-item rating scale to arrive at Axis I and Axis II diagnoses which were subsequently correlated with diagnoses obtained by standard psychometric methods, interrater agreement was 88 per cent for Axis I and 62 per cent for Axis II, with correlations of .94 and .79 respectively.

Deinstitutionalization has had an impact increasing the number of offenders with mental health problems within the correctional system. Furthermore, preliminary research claims that offenders with mental health problems are disproportionately denied when applying for parole. The reasons for this are not well understood. This exploratory qualitative research draws on 48 decisions from the Parole Board of Canada decision registry, four interviews with former parole board members, and observation data from 17 parole hearings to explore how mental health problems are constructed within the conditional release decision-making process. Against a risk logic back drop, this institutional ethnography analyzes the way parole board members understand and operationalize mental health within the decision-making process. Self-regulation, medication compliance, and the role of the expert were strong themes that emerged through a content analysis. By integrating symbolic interactionism and a governmentality framework, the current study explores how mental health in parole decision-making is influenced by individual, organizational, and macro-level risk rationalities that draw on neoliberal responsibilization strategies and "psy" expertise. The findings are presented within Hawkin’s (2002) legal decision-making framework. Policy and human rights implications are discussed.

Avsikten med denna uppsats är att undersöka hur dissociativ identitetsstörning (DID)gestaltas i filmen Split. Stereotyper och missuppfattningar har representerats länge i filmom psykiatriska sjukdomar och Split har blivit kritiserad för sin gestaltning avsyndromet, dock ser verkligheten med diagnosen olika ut. Analysen utforskar filmengenom de fyra DSM-IV kriterierna för DID. Scener analyseras med hjälp av Jens Ederskaraktärsklocka och representation av personer med DID som de andra, vilket innebärpersoner med psykiatriska sjukdomar ofta blir alienerade i film, och vi tillsammans, somfokuserar på hur de humaniseras och inkluderas samt stimulerar publikens medkänsla.Dessa metoder har använts för att komma fram till att filmen förhåller sig till DSM-IVkriterierna men att självaste gestaltningen av DID-karaktären är problematisk.Komplexa symptom i syndromet diskuteras i filmen men i slutändan framställs personermed DID som en fara för sig själva och andra, vilket kan bidra till att skada derassjälvbild

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