No description available.

The objective of this thesis is to analyze the power harmonic distortion of a steel factory and to mitigate the distortion by passive filters. The mathematical harmonic model of the industrial power system is built according to the power system network and the substation load characteristics of the steel factory. The substation load is converted as equivalent impedance, the harmonic voltage and harmonic current, and the total harmonic distortion of bus voltages and currents are then derived by the harmonic load flow analysis with the actual harmonic current data of the converters, cycloconverters, and VVVF in the plant. Due to the dynamic load behavior the stochastic harmonic current generated by various components is varied with the operation modes of all plants. To investigate the harmonic distortion of the steel factory with statistics oriented manner, the stochastic harmonic load flow analysis is executed to find the 95% confidential interval of system harmonic distortion.By this way, the effectiveness of passive filters for mitigation of harmonic distortion can be evaluated more accurately as compared to the conventional harmonic load flow analysis.

Thesis (M.S.)--Middle East Technical University, 2003. / Keywords: Cleaner production, waste reduction, dairy, market milk processing.

There are mainly women in the factory. There are a few men who work at the big pots cooking asparagus - about seven men.The women work in the sections packing the full tins onto the pallets and moving them. The workers in the fields have it better, they start at six o'clock and every day they knock off at three o'clock. Their food is taken to them on tractors

There have been calls in the P/OM literature for research aimed at a better understanding of manufacturing policy and requests in the OB literature for further clarification of the nature and effects of "contingency" variables. A field study was done in an effort to address both of these concerns. The study involved 20 manufacturing firms of 1,000 or more employees in four different industries. A theoretical model was developed which suggests a link between the degree of stability in the external environment and various aspects of structure and policy in manufacturing departments. The hypotheses tested predicted that policy would differ for firms facing different environments and that if policy and environmental conditions were appropriately matched, better departmental performance would result. Results indicate that the degree of environmental stability may relate negatively to the level of administrative intensity, the degree of preference for small versus large plants, and the degree of preference for low versus high inventories. These findings were in accord with the theory of the model. No support was indicated for predictions that the degree of environmental stability would correlate negatively with spans of control and with preferences for general-purpose equipment or for the expected positive relationship between stability and number of organizational levels or preferences for process structures. There was also no support found for the hypothesis that better "fit" of environment with policy/structure leads to better performance. There was some evidence that type of technology affects spans of control, number of levels, type of equipment preferred, and levels of inventories preferred, but no support for the importance of size (of firm) as an influence on policy and structure. The thesis discusses possible explanations for unexpected results and offers specific suggestions for future research.

Two complex wastes were considered for biological conversion into a marketable product. One waste, peat runoff water (the waste-water that remains after the mining of peat), was found to be unsuitable for biological conversion to any product since it contained an insufficient quantity of carbon. The other waste, NVR (non-volatile residue, the major waste from the manufacture of nylon 6$ sp prime 6 sp prime$), was found to be a suitable carbon and energy source for the production of PHB (poly-$ beta$-hydroxybutyric acid) by Pseudomonas cepacia ATCC 17697. A general approach to the development of complex toxic wastes as fermentation substrates was formulated. / NVR was found to be toxic to microorganisms. None grew in enrichment culture containing 2.0% NVR. P. cepacia was the most resistant microorganism found. It could grow well in up to 1.3% NVR. It also grew on butanoic, pentanoic, and hexanoic acid as well as 6-hexanolactone. These were found to be the major toxic components of NVR. P. cepacia was grown in a NVR-limited chemostat with a NVR feed concentration well in excess of the toxic NVR concentration. In nitrogen-limited, batch fermentation on fructose, P. cepacia accumulated PHB in excess of 50% of its dry weight. A 2-stage chemostat process for the production of PHB from NVR by P. cepacia was investigated with encouraging results.

No description available.

No description available.

This Thesis addresses Factory Layout Problems, and reviews and evaluates the available layout techniques. Manufacturing as a system has been studied and reclassified for factory layout: space demands and spatial relationships have been considered as main principles of Factory Layout Planning. This forms a basis for the introduction of a new, more efficient Factory Layout Planning Methodology, denoted as SPACE MANAGEMENT. A new COMPUTER AIDED FACTORY LAYOUT PLANNING system is formulated as a tool for: - preparing 3-D templates of Work Station Modules and Equipment Modules; - drawing a requested interior of an industrial hall/bay in 3-D; - positioning any 'objects1 (spaces), via manual interactive programs i n 3-D; - automatic positioning of work stations and equipment in the bay, in 'technological' order (in 3-D), using an automatic positioning program, with a facility for: collision course finding(with objects within the bay), manual override for corrections, and finding an optimum size (width) of the bay. The resulting layout scene can be observed from any required Position and distance. The system includes a set of auxiliary programs for Manual Feeding of lines of work stations in 'technological' order and for basic capacity calculations. CAFLAP also opens a new way of economic evaluation of Projects and alternatives. CAFLAP is implemented in FORTRAN 77 and uses the Computer Graphics System PICASO.

Thesis (MComm(Eng))--University of South Australia, 2001