Diploma thesis deals with design and exploration of installation in the draft tube of the swirl turbine. Use of the draft tube is defined in the first part, with illustration of energetical gain and efficiency of draft tube. Further the suitable shape of draft tube is studied by CFD computing. Design, research and evaluation of installation in the draft tube are solved in the main part.

This thesis deals with risk assessment in the production system on the assembly line in IG Watteeuw ČR s.r.o. company. Using metod FMEA analysis risk of each part of the production system of selected project. Detection of bottlenecks in the project management process and suggest improve of quality.

The subject of this thesis is using of FMEA method and risk assessment in the production process in Eurokov s.r.o. company. In the theoretical part are discussed the detail different types of FMEA and their applications. The practical part is focused on analyze the situation of poor quality for a specific product from Eurokov s.r.o. company. Data is used for application of FMEA form and to specification of precautionary measures for reduction poor quality in the production process.

Project developed within the Master's degree study proposes the study focused to identify and assessment of errors on the modules switchboards assembly line, because manufacturing companies are under heavy pressure to reduce production costs. The solution is optimization the productions processes and increasing their productivity.

The aim of this master’s thesis is the optimal design of swirl turbines for small water power plant. It is described a different possibilities of turbine‘s install for locality Vrchlabí. It presents a design of turbines and draft tubes. For the installation of turbines is computed theoretical production of annual electric energy. Furthermore it describes a design of supply channel and intake structure.

The aim of the thesis is to design a high-speed steam turbine as a small energy source. Steam turbine consists of a high-pressure, a medium-pressure and a low-pressure part with a removable condensing module. High-pressure part is designed to perform a single-stage radial turbine with axial steam outlet. The work also includes the layout of the modules and sections. To design individual parts are used steam table „X-steam“.

In the recent past, as more farm power is being demanded on farms, due to increased farm sizes and operating speeds, larger and heavier farm machines are deployed in various farming operations. Their cumulative negative effects have become more apparent with increased incidences of soil compaction problems. This has forced many farmers to practice deep tilling, using subsoilers to break up compacted subsoil layers. In some maize growing regions of South Africa, conventional subsoilers are used in a tandem configuration. The farmers believe that the use of subsoilers in this mode reduces the draft force per unit area tilled. This probably happens because the critical depth for the rear subsoiler is increased beyond its working depth of 600 mm. Operating in this mode necessitated this study, with the ultimate goal of testing an appropriate existing force model for a single tine in predicting the force requirements of the front subsoiler in a tandem configuration. Secondly, to develop an alternative model for the rear subsoiler based on the three-dimensional failed soil-profile and to determine the relative position of the front subsoiler at which energy utilization is optimized. To develop the proposed model, an analytical approach based on limit equilibrium analysis was used and a Matlab-based computer program was coded to solve it. Its verification was conducted through field experiments in sandy clay loam soil. The experiments consisted of a continuous measurement of the horizontal and vertical forces acting on each subsoiler by a two-dimensional force transducer system. At the same time, the three-dimensional and thus the cross-sectional areas of the disturbed soil-profiles at different sections were measured, as well as the soil characteristics. A manual method employing a pin-profile meter was used to measure the vertical cross-sectional areas of the failed soil-profiles at 100 mm intervals. Further more, a technique using an automatic penetrometer and a computer program was developed to identify and map the three-dimensional failed soil-profiles. This technique indicated that the subsoiler failed the soil beyond its maximum operating depth and width. The results also indicated that the soil-failure pattern at close spacing is in phase at both subsoilers, leading to reduced total draft force requirements. At a wider spacing, the soil-failure pattern was out of phase, thus resulting in increased total draft force requirements. At the same time, the cross-sectional area tilled per unit draft force increased with increased spacing. This was because the failed maximum cross-sectional area increased in size faster than the total draft force as the spacing was increased. The proposed model verification results show that the predicted and recorded forces at the rear subsoiler correlated reasonably well at a wider spacing. When the front subsoiler was shallow working and close to the rear subsoiler, the model under- predicted the measured forces on the rear subsoiler, whilst the Swick-Perumpral model over predicted the applied forces to the front subsoiler and this was generally the case at wider spacings. Furthermore the efficiency of the subsoilers was maximized when the longitudinal spacing was such that it allowed the soil failed by the front subsoiler to stabilize before the rear subsoiler reached it. The maximum cross-sectional area failed per unit draft force was recorded when the depth of the front subsoiler was equal to about 80% of the rear subsoiler-operating depth. The knowledge contributed by this research will not only facilitate qualitative field operations and optimize energy use, but also promote better management decisions. / Thesis (PhD (Engineering))--University of Pretoria, 2004. / Civil Engineering / unrestricted

Worldwide, changes in the family have become more evident. Many of the traditional roles that families used to play are now performed by other institutions, such as schools, churches, a variety of welfare agencies and non-governmental organizations. Families in South Africa are no exception, as many South African families are faced with challenges that have a negative impact on their ability to sustain themselves and their members. The previous Minister of Social Development, Doctor Zola Skweyiya, rightly acknowledged that, in order to address the needs of vulnerable groups in our communities effectively, we need a particular focus on the role of the family, both as a developmental and as a supporting institution. In responding to these challenges, the Department of Social Development developed a new Manual on Family Preservation Services (Department of Social Development, 2008b), with the aim of training social service professionals to deliver family preservation services. In order for the programme envisaged by the developers of the Manual to be implemented efficiently, the Norms and Standards Policy on Developmental Social Welfare Services (Department of Social Development, 2007a:52-57) mandates the roll-out of the training and education by all provinces. Thus all social service professionals are mandated to implement family preservation services as stipulated by the Norms and Standards Policy on Developmental Social Welfare Services (Department of Social Development, 2007a) and the Draft National Family Policy (Department of Social Development, 2008a). In her role as one of the trainers on family preservation services who was also responsible for monitoring and evaluating these services in the provinces, the researcher observed the inadequacy and inconsistency of the concept of family preservation services in reporting among social service professionals despite the training and capacity-building carried out by the Department of Social Development. The researcher therefore investigated, first, whether the formulation of the Manual on Family Preservation Services lacks clarity relating to the theoretical framework and operational definition of key concepts which are supposed to assist social service professionals in rendering effective family preservation services. Second, she interviewed 20 social workers regarding their experiences on the formulation and implementation of the Manual. This is a small sample in terms of representing social workers in the country. In total, 37 social workers were originally interviewed, but, because it transpired that they had never attended any training on the Manual for Family Preservation Services, their data were excluded from the empirical study, even though they are implementing these services. The researcher was therefore interested in analysing the formulation of the Manual on Family Preservation Services and also analysed the experiences of social workers regarding the formulation and implementation of the Manual, with the aim of identifying gaps and improving service delivery to families. The researcher reviewed prior literature on systems theory, which is fundamental in addressing family dynamics, the family life cycle and its stages. She also considered literature on family preservation services on four levels of service delivery, the stages of the policy cycle and the overview of the Draft National Family Policy, as well as the Manual of Family Preservation Services. In this study, the researcher adopted an explanatory design, which is a form of mixed methods research. The overall purpose of an explanatory design is to gather qualitative data that help to explain or build upon initial quantitative results from the first phase of the study. In order to collect quantitative data, the researcher used a checklist for a content analysis of the formulation of the Manual on Family Preservation Services. She then conducted semi-structured interviews to collect qualitative data about social workers’ experiences regarding the formulation and implementation of the Manual on Family Preservation Services in eight provinces. The researcher did a pilot test of the semi-structured interview schedule, which helped her to refine two questions that were understood differently by the two social workers who participated in the pilot test. After latent coding, the quantitative data were analysed manually, while the qualitative data were coded according to Creswell’s model for qualitative data analysis. The quantitative empirical results revealed some limitations in the formulation of the Manual on Family Preservation Services. Such limitations include an unclear definition of the concept of family preservation services, the omission of objectives from the Manual, confusion with regard to the theoretical frameworks applied, a lack of clarity on the role of volunteers, the process of providing training and capacity-building to social service professionals, monitoring and evaluation plan. These findings were confirmed by the social workers who were interviewed. They exposed the confusion that exists on the definition of family preservation services, the objectives, the theoretical frameworks, the role of volunteers, high case-loads, which they linked to a shortage of social workers and the fact that resources, training and capacity-building on family preservation services are not prioritized. It was therefore recommended that the issues highlighted above be addressed and be included in a revised Manual, and that relevant material also be provided to social service professionals who need to implement family preservation services. / Thesis (DPhil)--University of Pretoria, 2009. / tm2015 / Social Work and Criminology / DPhil / Unrestricted

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This dissertation consists of three essays, each covering very distinct topics under the broad umbrella of Development Economics, each set in a different region of the developing world (Latin America, Sub-Saharan Africa, and South Asia). The one element that loosely ties them together is that they each seek to add, in a small way, to our understanding of factors that contribute to, and in some cases may entrap people in, poverty: factors such as (lack of) geographic mobility, hunger, and disease. In the first chapter, I use the natural experiment of military conscription in Argentina, which randomly assigned not only military service, but also the location of service, to study the effect of this temporary displacement on long-run migration rates. I then use a rich source of administrative earnings and employment data to investigate the labor-market implications of conscription and, in particular, displacement. I find that conscription on the whole caused a small increase in the likelihood of appearing in the formal labor force, and a small increase in earnings particularly for those who were assigned to serve in the Navy. Assignment to military service outside of one's province of origin increased the likelihood of living outside the province of origin by 2.5 percent, and while the net effects of this displacement on earnings and employment are imprecisely estimated, the evidence suggests that there are modest long-term benefits of conscription in Argentina that are not fully attributable to displacement. In the second chapter, I investigate the effects of Ramadan on calorie consumption and labor supply among Muslim households in rural Malawi. Across four rounds of household survey data, I find no evidence of a decrease in calorie consumption during Ramadan on average. I do, however, find evidence that working-age people reduce their weekly work by about three hours, or nearly 20 percent, on average. This finding on calories shows substantial variation across the different rounds of data. The evidence presented calls into question the hypothesis that consumption during Ramadan should fall more dramatically when the holiday overlaps with the harvest (when baseline consumption levels are relatively high compared to the rest of the year), compared to when Ramadan falls near the annual hunger season (when baseline consumption levels tend to be much lower). I discuss potential implications of this variation for our understanding of seasonal consumption patterns. The third and final chapter, which is authored jointly with Kaivan Munshi and Nancy Luke, discusses a randomized intervention conducted in rural South India aimed at improving rates of treatment completion for tuberculosis. Tuberculosis (TB), despite being a highly treatable disease, kills well over 1 million people every year, with 95 percent of cases and deaths appearing in developing countries. India bears the largest TB burden of any country, with more than 25 percent of the world's total yearly cases. A key factor for successful management of TB is ensuring that patients complete the full six-month (or more) treatment regimen: missing even a few doses of the prescribed medications increases the likelihood of relapse and development of a drug-resistant strain of TB, which is much more difficult and costly to treat effectively. We conduct an intervention allowing patients to select a community member to serve as a Directly Observed Treatment (DOT) provider to help ensure compliance with the full treatment regimen. Although patients assigned a Community DOT provider report significantly more frequent visits and higher rates of satisfaction compared to our control group, we do not find any significant improvement in treatment outcomes among those assigned this intervention. We explore several potential explanations for this finding and suggest potential avenues for future research.