Zugl.: St. Gallen, Universiẗat, Diss., 1999. / Auch u.d.T.: Waltert, Michael J.: Markt- und Prozessorientierung im industriellen Mittelstand.

Th. sci. écon. et soc. Fribourg Suisse, 2000. / Bibliogr. Existe aussi en version électronique.

Parametric equations are commonly used to describe surfaces. Looking at parametric equations does not provide tangible information about an object. Thus through the use of physical materials, an understanding of the limitations of the materials allows someone to gain a broader understanding of the surface. A M$\ddot{o}$bius strip and Figure 8 Klein bottle were created through knitting due to the precision and steady increase in curvature allowed through knitting. A more standard Klein bottle was created through crochet due to the ease in creating quick increases in curvature. Both methods demonstrate the change in curvature for both surfaces where the M$\ddot{o}$bius strip and Figure 8 Klein bottle have slower changes in curvature, but the classic Klein bottle has a quicker change in curvature.

published_or_final_version / abstract / Physics / Master / Master of Philosophy

The Klein Berg River catchment is intensely cultivated with orchards, vineyards and wheat, while also ensuring a water supply to the main urban center, Tulbagh, and the two conservation areas (Waterval and Groot Winterhoek). The primary objective of this thesis is to determine channel change over a long and short time period, and to relate these changes to landuse change within the catchment. <br /> <br /> Assessing stability of a selected reach within the catchment was done on a short term basis with the use of erosion pins and cross<br /> profiles, while aerial photographs of over 55 years (acquired during 1942, 1967, 1987 and 1997) which were analysed using Geographic Informations Systems. Rainfall and discharge data, which were available for a period of 49-years were statistically analysed and used to determine trends. Vegetation characteristics were assessed by means of transects within the study reach. The results over the short time period (18 months) indicate noticeable channel change in the form of erosion and deposition within the channel. Bank material composition and riparian invasive alien vegetation play an important role in bank stability. Sand was the dominant grain size of the bank material, and fluvial entrainment occurred during periods of high flow. Woody alien trees prevent the growth of protective ground vegetation, and thus the soil is prone to erosion. Undercutting was also observed with the invasive woody trees, resulting in treefall. Debris dams were also common in the channel and depending on their position in the channel, either cause or prevent bank erosion. Landuse change over the 55-year period illustrated its effects on channel stability. Shrublands within the catchment has been replaced with invasive alien vegetation along the riparian zone, while shrublands along the Obiekwa Mountains, were replaced with cultivated lands. The patterns (shape and size) of lateral and point bars within the study area changed significantly within the 55-year period, which indicates a change in the discharge and sediment dynamics within the catchment. The change in sediment dynamics may be due to agricultural activities and urbanization. The increased trend in rainfall, especially during the winter season within the catchment is also an important catchment control. The study has revealed the integrated nature of variables within the catchment. It is thus recommended that a holistic and integrated approach at a catchment scale is required in the assessment of channel change of a river.

Orientador: Manoel Ferreira Borges Neto / Resumo: Nesta dissertação é apresentada uma aproximação da Teoria de Variáveis Complexas de duas para quatro dimensões. Procura-se definir diferenciabilidade de funções quaterniônico, a partir da qual se estabelece uma relação com a teoria de regularidade de funções hipercomplexos [9]. Observa-se que após definir o operados quaterniônico T, é possível reescrever equações clássicas da Física de forma concisa, utilizando a definição de regularidade, que resulta na decomposição de uma equação diferencial de segunda ordem em duas equações diferenciais lineares de primeira ordem. / Mestre

Based on qualitative interviews with musicians, label owners, owners of clubs and journalists, this paper describes Vienna's independent music scene from different angles. Beside of the pure description of the field of creative production (Bourdieu), we focus on the economic aspects of the scene and the relationships between the members of the scene. We show that the music production within the scene does not follow the rules of the market. It is neither organized within hierarchies, but mostly works on the basis of informal exchange. This works because the scene members are motivated intrinsically. So the artistic expression, high quality and originality are most important - and not money or fame. The Viennese music scene is therefore another example for an interesting phenomenon: a non-market or demandoriented production field within a highly capitalistic environment. / Series: Schriftenreihe / Forschungsbereich Wirtschaft und Kultur

No description available.

Zugl.: Erlangen, Nürnberg, Universiẗat, Diss., 2007. / Hergestellt on demand.

Zugl.: Duisburg, Essen, Universiẗat, Masterarbeit, 2007.