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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

BMX –Funktionalitäten zur Berechnung des Massenausgleichs

Denninger, Daniel 10 June 2010 (has links)
Die vorliegende Publikation stammt aus der Reihe "Tipps und Tricks" im Umgang mit Pro Engineer. Es werden BMX-Funktionalitäten zur Dimensionierung eines Massenausgleiches algorithmisch dargestellt. Als Beispiel dient ein Schubkurbelgetriebe, welches bezüglich seiner Gestellkraftkomponenten analysiert wird. Mit Hilfe eines Lancaster-Ausgleiches kann die Lage des Massenschwerpunktes bezüglich der X- und Y-Komponente optimiert werden.
12

Kurvenscheibensynthese: Lösungsansatz zum Abbilden von Rast in Rast Übertragungsfunktionenin Pro/ENGINEER

Stegemann, Patrick 12 May 2011 (has links)
Der Vortrag behandelt die praktische Umsetzung einer Rast in Rast Kurvenscheibensynthese (Übertragungsfunktion: modifizierte Sinoide) bis zum Ableiten einer ersten Grundform der Kurvenscheibe. Aufgezeigt werden dabei die notwendigen Schritte zur Parametrisierung der Eingabedaten wie Kurvenscheiben- und Übertragungswinkel sowie das spätere Ausleiten einer Spurkurve (Bewegungsaufzeichnung des Kontaktpunktes Kurvenscheibe/Koppel) in das Modell der Kurvenscheibe. Die folgenden notwendigen Optimierungsschritte zur Reduzierung des Krafteingriffswinkels, des Normalkraftverlaufs und der Kurvenscheiben - Mittelpunktslage werden theoretisch behandelt. Das Umsetzen der Optimierung könnte mit Hilfe des Behavioral Modeling Extension - Moduls aus Creo Elements/Pro erfolgen.
13

A Point of Tension: Using Personas to Improve the Apparel Design Process

Brallier, Lauren A. 05 August 2016 (has links)
No description available.
14

Subcultures and Small Groups : A Social Movement Theory Approach

Corte, Ugo January 2012 (has links)
This dissertation uses social movement theory to analyze the emergence, activities and development of subcultures and small groups. The manuscript is comprised of an Introduction followed by three journal articles and one book chapter.  The introduction discusses: 1) the concept of theoretical extension whereby a theory developed for one purpose is adapted to another; 2) it identifies the social movement theories used to analyze subcultures and small groups; 3) it describes the data used in the analyses included here. The data for this work derives from two distinct research projects conducted by the author between 2002 and 2012 and relies on multiple sources of qualitative data. Data collection techniques used include fieldwork, archival research, and secondary data. Paper I uses resource mobilization (RM) theory to analyze the origin, development, and function of White Power music in relation to the broader White Power Movement (WPM). The research identifies three roles played by White Power music: (1) recruit new adherents, (2) frame issues and ideology for the construction of collective identity, (3) obtain financial resources. Paper II gives an overview of the subculture of Freestyle BMX, discussing its origins and developments—both internationally as a wider subcultural phenomenon, and locally, through a three-year ethnographic case study of a subcultural BMX scene known as “Pro Town USA.” Paper III conceptualizes BMX as a social movement using RM theory to identify and explain three different forms of commercialization within this lifestyle sport in “Pro Town.” The work sheds light on the complex process of commercialization within lifestyle sports by identifying three distinct forms of commercialization: paraphernalia, movement, and mass market, and analyses different impacts that each had on the on the development of the local scene.  Findings reveal that lifestyle-sport insiders actively collaborate in each form of commercialization, especially movement commercialization which has the potential to build alternative lifestyle-sport institutions and resist adverse commercial influences. Paper IV refines the small group theory of collaborative circles by: (1) further clarifying its concepts and relationships, (2) integrating the concepts of flow and idioculture, and (3) introducing a more nuanced concept of resources from RM. The paper concludes by demonstrating that circle development was aided by specific locational, human, moral, and material resources as well as by complementary social-psychological characteristics of its members.
15

CAD orientierte Teach-In Simulation und Bewegungsoptimierung für beliebige Roboterbaureihen

Riedel, Mathias 13 May 2009 (has links) (PDF)
Der Vortrag beschäftigt sich mit der Simulation von Handhabungs- Montage- und Fertigungsaufgaben mit Hilfe von einem bzw. mehreren miteinander zusammenarbeitender Industrieroboter. Es werden Möglichkeiten aufgezeigt, wie die Herangehensweise für den Aufbau einer solchen Simulation ist. Weiterhin wird auf das Thema der Glättung von Unstetigkeiten nach verschiedenen Verfahren und deren Auswirkung auf die Bahntrajektorie eingegangen.
16

Freestyle BMX a letní olympijské hry / Freestyle BMX and olympic games

Čermák, Daniel January 2018 (has links)
Tittle: Freestyle BMX and Summer Olympic Games Objectives: The main aim of this thesis is the analysis process of Freestyle BMX acceptance to the Tokyo 2020 Summer Olympics with evalution. In addition, this thesis defines the historical movement of the Freestyle BMX candacy and evaluate the conditions (criteria) setted by the International Olympic Committee for the adoption of new sports into the Olympic Games program. Methods: This thesis is a theoretical work that has a descriptive and analytical character so the main method is an analysis and study of documents, literature and web sources. The information was analyzed and comprehensively processed. Results: Results indicate that Freestyle BMX didn't satisfy all the criteria for acceptance of a new sport into the Olympic Games program. Freestyle BMX should not be accepted according to the criteria set into the Olympic Games program. Freestyle BMX was accepted on the basis of other facts according to this information. Probably this has been achieved on the basis of an evaluation of the popularity sport. Keywords: Sport, Cyclist, Cyclist discipline, Freestyle BMX, Olympics, Summer Olympic Games, Tokyo 2020
17

'Free sports' : organizational evolution from participatory activities to Olympic sports

Batuev, Mikhail January 2015 (has links)
Free sports are the phenomena that have rapidly developed from lifestyle activities to professional competitive sports over the last several decades. Known for distinctive counter-culture values, many popular free sports, such as snowboarding or BMX, have recently become largely commercialized and experienced significant organizational change. The main research question of this study is how free sports have organizationally evolved over time. This thesis focuses on patterns and mechanisms of structural change and evolution of values of these sports. The research utilized a multiple case qualitative methodology and is presented as a cross-case study of three international sports: competitive snowboarding, competitive skateboarding, and sport climbing. A review of existing literature identified the theory of new institutionalism as being particularly relevant to this study and thus, supplemented by resource-dependence theory, this forms the theoretical framework for this research. This study found that as a result of organizational evolution, informal organizational arrangements, which were historically typical for free sports, have not been uniformly replaced by formalized structural arrangements of mainstream sports. In addition, the organizational fields of these free sports are found to have adopted multiple logics, such as commercial, competitive, and traditional free sport logics. The notion of cultural legitimacy of international sport organizations appears to be central to explaining organizational evolution of free sports. As conflicts revolving over the “ownership” of international sports and the practice of “umbrella” governance are found to be of great concern in free sports, it is the relationship between cultural and regulatory legitimacy that these issues are addressed through. Finally, it is found that multiple power/dependence relationships existing in organizational fields of free sports are largely underpinned by commercial interests and strategies of the Olympic movement. In terms of contribution to theoretical knowledge, this study extends previous applications of institutional and resource-dependence theories to free sports and reveals that the process of institutionalization of sports does not necessarily lead to change of values in macro perspective. However, it can facilitate and foster a separation between two different “versions” of the same sports: competitive sports and traditional sports. This study contributes to wider practical sport management knowledge by raising a question of sustainability of culturally legitimate but unconventional international sport organizations in the global sport business. Another implication of this study is challenging the IOC as a source of regulatory legitimacy for sports and questioning the belief that all sports strive for the Olympic Games, which is taken for granted as the ultimate goal of evolution of sports in a global context. This is a major call of this study to both academics and practitioners, as governance of international sports is expected to remain the topic of a great debate in academic literature and popular media.
18

Kinematische Analyse ebener und räumlicher Getriebestrukturen mit Hilfe von Motion-Skeletten

Heine, Andreas 13 May 2009 (has links)
Der vorliegende Beitrag befasst sich mit dem Einsatz von Motion-Skeletten bei der kinematischen Analyse von zwei- und dreidimensionalen Getriebestrukturen. Im ersten Teil werden verschiedene Möglichkeiten aufgezeigt, welche Pro/ENGINEER für die Mechanismus-Analyse bietet und bezüglich ihrer Eignung für kinematische Strukturen verglichen. Am Beispiel einer exzentrischen Schubkurbel wird anschließend der Aufbau und die Funktionsweise eines Motion-Skelettes erklärt. Neben der reinen kinematischen Analyse einer solchen Struktur wird auch der Einsatz von BMX zur Optimierung von Koppelgetrieben gezeigt.
19

Favorit Brno / cyklistický stadion - bikrosová dráha / - architektonická studie - design / Favorite Brno / cycling / track stadium bikrosová architectural study design

Vranová, Marta Unknown Date (has links)
The diploma thesis is focused on an architectonic study of cycling stadium in Brno Komárov that shall substitute the current velodrome at Brno´s fair ground that does not conform to current Olympic standards and that shall provide new and better conditions not only for the club Favorit Brno base but also for other enthusiastic sportsmen of track cycling. The study regards also the future adding of another sport, of athletics as Brno has not enough of covered training areas. That is why I add the cycling with this sport in my diploma thesis so that the building can offer its maximum not only to top sportsmen but also occasional sport enthusiasts and to enrich its surroundings to its maximum. The building design uses combination of concrete, steel and glass. Large glass façade is shielded with a great roof overlap that shall provide a natural shielding in summer period. The diploma thesis was preceded with a specialised atelier TG02 that was focused on the development of adjacent surfaces, on the BMX track that should closely cooperate with the new cycling stadium. The specified territory in Komárov Brno presents a great sport potential that shall be developed in the future.
20

CAD orientierte Teach-In Simulation und Bewegungsoptimierung für beliebige Roboterbaureihen

Riedel, Mathias 13 May 2009 (has links)
Der Vortrag beschäftigt sich mit der Simulation von Handhabungs- Montage- und Fertigungsaufgaben mit Hilfe von einem bzw. mehreren miteinander zusammenarbeitender Industrieroboter. Es werden Möglichkeiten aufgezeigt, wie die Herangehensweise für den Aufbau einer solchen Simulation ist. Weiterhin wird auf das Thema der Glättung von Unstetigkeiten nach verschiedenen Verfahren und deren Auswirkung auf die Bahntrajektorie eingegangen.

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