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An electric motor drive is a power-electronic based system that is used to precisely control the position, speed or torque developed by motor. With the growing complexity of drive systems and the expansion of the use of fast acting power-electronic controllers, computer simulation models are used instead of an explicit mathematical description of a complex system. The aim of this research is to study the use of the simulation based design method for advanced motor drives. The major problem for simulation of a drive system performance is the presence of both fast and slow dynamics in its response that result in relatively long time simulations with a small time step. Moreover, the simulation-based optimal design has a repetitive nature. Therefore, the simulation-based optimal design of a drive system is massively time consuming and requires extensive computing resources. In this research reduced intensity computer models are used to overcome this problem.

An electric motor drive is a power-electronic based system that is used to precisely control the position, speed or torque developed by motor. With the growing complexity of drive systems and the expansion of the use of fast acting power-electronic controllers, computer simulation models are used instead of an explicit mathematical description of a complex system. The aim of this research is to study the use of the simulation based design method for advanced motor drives. The major problem for simulation of a drive system performance is the presence of both fast and slow dynamics in its response that result in relatively long time simulations with a small time step. Moreover, the simulation-based optimal design has a repetitive nature. Therefore, the simulation-based optimal design of a drive system is massively time consuming and requires extensive computing resources. In this research reduced intensity computer models are used to overcome this problem.

Habilitationsschrift--Tübingen, 1976. / Includes index. Includes bibliographical references (p. [xiv]-xxxi).

Multiple Description Coding (MDC) is a source coding technique which generates several descriptions of a signal such that the reconstruction gradually refines with the number of decoded descriptions. Conventionally, the design of MDC has largely focused on combating the description loss. This thesis considers the construction of robust multiple description lattice vector quantizers (MDLVQ) by addressing the problem of designing an index mapping able to combat bit errors. We consider the scenario when the first description is received correctly at the decoder while the second one may carry bit errors. Our approach is to use a good assignment of the central lattice points to pairs of side lattice points, as developed in previous work, and design the mapping of the second description side lattice points to binary indexes such that the expected channel distortion to be minimized. In this thesis, we propose two methods to tackle this problem. The first method is a binary switching heuristic algorithm, which starts with an initial mapping and iteratively switches two indexes such that the distortion is decreased. This algorithm only guarantees a locally optimal solution whose quality depends on the initial configuration. The second approach attempts to increase the minimum Hamming distance between possible indexes in the second description when the first description is fixed. This is achieved using a structured construction as follows. First the set of second description side lattice points is partitioned into Voronoi regions of a carefully chosen coarse lattice. Next a channel code with high Hamming distance is picked, each Voronoi region is assigned a coset of this channel code and the side lattice points within each Voronoi region are mapped to binary sequences in the corresponding coset. We point out that in order to achieve good performance the mapping of Voronoi regions to cosets of the channel code must assign cosets close in Hamming distance to neighboring Voronoi regions. Two methods to achieve this goal are proposed and bounds on their performance are derived. Finally, simulations are carried out to assess the practical performance of the proposed designs. Our results show significant performance improvement when the proposed index mappings are used versus non-optimized mappings. / Thesis / Master of Applied Science (MASc)

The research at hand maintains an emic approach to understanding (im)politeness1 (i.e. in its folk sense) within the meaning making processes involved in Turkish. With the intention of reaching an ethnopragmatic theoretical account of (im)politeness, this study investigates tacit knowledge native speakers of Turkish have on (im)politeness and their related perceptions and evaluations. The thesis explores the cultural-conceptual system of (im)politeness in Turkish utilizing three sources: (a) data from an open-ended metapragmatic conceptualization questionnaire probing Turkish native speakers&rsquo / politeness encounter narratives through seven key metapragmatic politeness terms (i.e. KiBAR, iNCE, NAZiK, D&Uuml / S&Uuml / NCELi, SAYGILI, G&Ouml / RG&Uuml / L&Uuml / , TERBiYELi) and eight key impoliteness terms (i.e. KABA, NEZAKETSiZ, D&Uuml / S&Uuml / NCESiZ, SAYGISIZ, G&Ouml / RG&Uuml / S&Uuml / Z, TERBiYESiZ, PATAVATSIZ, K&Uuml / STAH), and (b) corpus analyses for the lexical items KiBAR and KABA, (c) (im)politeness encounter narrative interviews with native speakers of Turkish. This research study has been designed mainly as an exploration of what Turkish people consider to be (im)polite, how they express they become (im)polite, and how (linguistic) (im)politeness is interpreted by others in everyday communication, as well as how Turkish native speakers evaluate (im)politeness through the key (im)politeness lexemes available in the language, what their &lsquo / bases of evaluation&rsquo / are and what views they hold concerning motivations underlying the want to be (im)polite in Turkish. The qualitative thematic analysis conducted on the questionnaire data yielded six bases of evaluation for (the total of 1211) politeness narratives, and eight bases of evaluation for (the 1306) impoliteness narratives. It was revealed that the bases of evaluation for a polite act in Turkish were primarily &lsquo / attentiveness to other&rsquo / s emotions, needs and goals&rsquo / and abidance by &lsquo / custom&rsquo / , whereas they were &lsquo / (quality) face-attack&rsquo / and &lsquo / (equity) rights violations&rsquo / for impoliteness. The corpus analysis and interview data also corroborated these findings. The quantitative cross-mapping of (im)politeness lexemes to (im)politeness themes suggested biases of lexemes for certain themes and themes for lexemes. The motivational and strategic uses of (im)politeness were related more to egocentric tendencies with politeness being motivated predominantly for self-promotion and image management, and goal attainment, and impoliteness motivated mainly by the desire to establish power and project power on to other, to perform an emotive reaction, to hurt other and to reciprocate others&rsquo / impolite acts to self. The relationship between (im)politeness and the concepts of sincerity, intentionality, historicity, reciprocity and public versus private domain influences are worth pursuing further research on for the Turkish culture. All in all, this study provides Turkish baseline data for later cross-cultural (im)politeness research and suggests that (im)politeness1 (lay) conceptualizations can aid the (scientific) theorizing of (im)politeness2 to a great degree.

Um dem Aussterben unserer Dörfer entgegen zu wirken benötigt es impulsgebende Ideen die sich in einer bestehenden Struktur einfinden und diese durch Verknüpfungen zwischen Dorfbewohner/innen und Zuziehenden bereichert. Es müssen Räume geschaffen werden die dem demographischen Wandel trotzen und sich durch ein hohes Maß an Resilienz auszeichnen. Multifunktionale Strukturen die von den Bewohnenden je nach Jahreszeit genutzt werden können und die in einem gewissen Kreislauf der Nutzung zueinander stehen, können es schaffen, kollektives Wohnen und Arbeiten mit der kulturellen Eingliederung in eine gewachsene Struktur abzubilden. Hierbei ist es wichtig Räume des Privaten und des Öffentlichen in einen Kontext zu stellen, der Besucher/innen und Bewohner/innen die Freiheit gibt sich zurück zu ziehen und transformative Flächen der Begegnung zu schaffen. Der Bestand einer leer stehenden Hofanlage kann dabei als Hülle und Ressource für etwas Neues dienen und aus dem Inneren heraus wirken. Additive Kubaturen schließen dabei den Bestand und geben dem Ort eine neue Identität in dem sie ihn für die Öffentlichkeit zugänglich machen. Dabei sollte das Bauen im ländlichen Raum nicht wie in der Vergangenheit oft betrachtet, aus einer Stadt-Umland Beziehung funktionieren, sondern sich als eigenständige Bewegung im Bestand verstehen. Eine Art urbanisiertes Dorf und das damit verbundene, kulturelle Angebot kann es schaffen, nachhaltig bereits zersiedelte Regionen zu verdichten, Abgang der jüngeren Generation zu verhindern und damit den Verfall erhaltenswerter architektonischer Denkmäler in neue wirtschaftliche Nutzungen zu überführen. Fernab von den großen Neubauten der umliegenden Ballungsräume.:1. Das Dorf: Analyse des ländlichen Raums in Niedersachsen 2. Erste Lösungsansätze für die vorgefundene Problemstellungen 3. Analyse des Ortes Neuland, Samtgemeinde Nordkehdingen 4. Bestandsanalyse der Hofanlage Husfeldt 5. Leitfaden 6. Energiekonzept 7. Schlafscheune 8. Schaffenshaus 9. Orangerie 10. Mobilitätskonzept

Universiẗat, Diss.--Karlsruhe, 2007.