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A model of the chemostat involving two populations of microorganisms competing for two perfectly substitutable, growth limiting nutrients is developed. To describe nutrient uptake, a general class of functions is used which allows for the effects that the consumption of one resource may have on the consumption of the other. It includes as a special case the model studied by Waltman, Hubbell and HSu [21] in which they generalize Michaelis-Menten functional response for a single resource to two perfectly substitutable resources. It also generalizes the model studied by Leon and Tumpson [12] where the consumption of each resource is unaffected by the consumption of the other. Analytical methods are used to obtain information about the qualitative behaviour of the model. Interesting similarities are found between both the local and global behaviour in this model and in the model for perfectly complementary resources. / Thesis / Master of Science (MS)

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Like much of the world, the United States is currently experiencing intense growth, especially in and around its cities. Unfortunately, this growth is often at odds with the natural environment. In order to reduce the demand of foreign energy resources designing with "green" or ecologically responsive design objectives in mind is vital. We may think of cars and factories as the most obvious enemies of the environment, but buildings consume half of the energy used world wide. The idea of this thesis project was to explore the possibilities of sustainable strategies.That is to develop an energy intensive building based on ecological principles as design tools that demonstrate the economic value of sustainability, and to highlight an energy intensive building type as an example of energy-responsive-living that actually 'looks good'. / Master of Architecture

Assignment (MPhil)--Stellenbosch University, 2000. / ENGLISH ABSTRACT: From 1954 to 1993 the Rooibos Control Board, a statutory one-channel marketing system, regulated the rooibos industry. In 1993 the industry was deregulated and competition between different role players in the industry emerged. In this study competitiveness is analysed from both a historical as well as a modem -day perspective. Modem economic theory defines that competition is good for all industry and that it leads to economic development. In the case of the rooibos industry, one could be inclined to think that the unique character of the product and the fact that the Control Board had established a marketing mechanism would limit competition and rivalry in the post -Control Board era. Inthis study it was determined that deregulation in this industry coincided with very intense price-driven rivalry in the export market whilst very little rivalry occurred in the domestic market. The information for this thesis was obtained from published Annual Reports of the Rooibos Control Board and from personal interviews with the main role players in the industry. Two strategies that could enhance the competitiveness of this industry are recommended: 1. Repositioning rooibos as a gourmet health tea. 2. Improving supply chain coordination within the industry. / AFRIKAANSE OPSOMMING: Verbetering van die Mededingendheid van die Rooibos Industrie Vanaf 1954 tot 1993 het die Rooibos Beheerraad, 'n statutêre enkelkanaal bemarkingsorganisasie, die rooibosindustrie gereguleer. In 1993 is die bedryf gedereguleer en kon mededinging tussen verskillende rolspelers plaasvind. In hierdie studie word mededinging uit beide 'n historiese sowel as moderne perspektiefbestudeer. Moderne ekonomiese teorie stel dit dat mededinging tot voordeel van alle industrieë is en dat dit lei tot ekonomiese ontwikkeling. In die geval van rooibos sou mens geneig wees om te dink dat die unieke karakter van die produk en die feit dat 'n bestaande bemarkingskanaal alreeds bestaan, mededinging sou beperk in die post-Beheerraad tydvak. In hierdie studie is bevind dat deregulering gepaard gegaan het met intense prys-gedrewe mededinging in die uitvoermark, terwyl die binnelandse mark bykans geen mededinging ervaar rue. Die inligting vir hierdie tesis is verkry uit gepubliseerde Jaarverslae van die Rooibos Beheerraad en deur persoonlike onderhoude wat gevoer is met rolspelers binne die bedryf Twee strategieë word voorgestel waarmee die bedryf meer mededingend gemaak kan word: 1. Produk herposisionering as 'n gourmet gesondheidstee. 2. Verbeterde koordinasie binne die voorsieningskettings.

The aim of my thesis is to explain the meaning of the expression "non- competition clause" and to analyse its legal regulation in Czech labour law. The reason why I chose this topic is that non-competition clause is a very dynamic subject with a lot of changes in a historical point of view as you can see above. First of all, non-competition clause is an instrument of labour law which protects an employer against the abuse of the company's confidential information, knowledge and other know-how by the employee. According to the Czech legislation, non- competition clause means a voluntary agreement between employer and employee whose purpose is to protect employer's interests by reducing employee's job opportunities which would have a competitive character to the employer after the determination of an employment with the employee. There are several conditions need to be achieved in order to conclude a valid non- competition clause. For example, this contract needs to be agreed in writing. Secondly, the non-competition clause may be valid for only a certain period of time, not exceeding one year. Moreover, an employer is obliged to pay the employee some kind of a financial compensation every month. The amount of this compensation needs to be at least one average monthly salary of the employee. This...