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- 2008 (32) (remove)
Wissenschaftliches Kolloquium vom 19. bis 22. April 2007 in Weimar an der Bauhaus-Universität zum Thema: ‚Die Realität des Imaginären. Architektur und das digitale Bild'
Image and the Space of the Modern City in Erich Mendelsohn's Amerika: Bilderbuch eines Architekten
(2008)
Wissenschaftliches Kolloquium vom 19. bis 22. April 2007 in Weimar an der Bauhaus-Universität zum Thema: ‚Die Realität des Imaginären. Architektur und das digitale Bild'
Wissenschaftliches Kolloquium vom 19. bis 22. April 2007 in Weimar an der Bauhaus-Universität zum Thema: ‚Die Realität des Imaginären. Architektur und das digitale Bild'
Wissenschaftliches Kolloquium vom 19. bis 22. April 2007 in Weimar an der Bauhaus-Universität zum Thema: ‚Die Realität des Imaginären. Architektur und das digitale Bild'
Presence, Privacy, and PRIMIFaces: Towards Selective Information Disclosure in Instant Messaging
(2008)
Efficient distant cooperation often requires spontaneous ad-hoc social interaction, which is only possible with adequate information on the prospective communication partner. This often requires disclosing and sharing personal information via tools such as instant messaging systems and can conflict with the users’ wishes for privacy. In this paper we present an initial study investigating this trade-off and discuss implications for the design of instant messaging systems. We present the functionality and design of the PRIMIFaces instant messaging prototype supporting flexible identity management and selective information disclosure.
Wissenschaftliches Kolloquium vom 19. bis 22. April 2007 in Weimar an der Bauhaus-Universität zum Thema: ‚Die Realität des Imaginären. Architektur und das digitale Bild'
Wissenschaftliches Kolloquium vom 19. bis 22. April 2007 in Weimar an der Bauhaus-Universität zum Thema: ‚Die Realität des Imaginären. Architektur und das digitale Bild'
We propose an enhanced iterative scheme for the precise reconstruction of piezoelectric material parameters from electric impedance and mechanical displacement measurements. It is based on finite-element simulations of the full three-dimensional piezoelectric equations, combined with an inexact Newton or nonlinear Landweber iterative inversion scheme. We apply our method to two piezoelectric materials and test its performance. For the first material, the manufacturer provides a full data set; for the second one, no material data set is available. For both cases, our inverse scheme, using electric impedance measurements as input data, performs well.
Digital storytelling of remote social interaction, where the situation of a remote group distributed over two locations is captured and a story is generated for later retrieval, can provide valuable insight into the structure and processes in a group. Yet, capturing these situations is a challenge—both from a technical perspective, and from a social perspective. In this paper we present CoLocScribe: a concept and prototype of an advanced media space featuring ubiquitous computing technology for capturing remote social interaction as well as a study of its use providing valuable feedback for the captured persons as well as input for the authors.
The intention of this thesis is first, to determine material constants of ductile cast irons (EN-GJS-400-15,EN-GJS-500-7, EN-GJS-600-3) for estimating fatigue damage. These constants are obtained from experimental results. These results are stress versus strain tests, strain versus crack initiation life tests,and consequently, Smith, Watson and Topper damage parameter, PSWT can be calculated. Using data fitting, the constants can be estimated, thus Uniform Material Law for ductile cast irons is fulfilled. Endurance limit stress is obtained based on research report termed Synthetic Wöhler Lines(SWL).It is found out that the endurance limit stress is a function of yield limit stress. Endurance life cycle is set as three millions for the three materials. Secondly, fatigue life assessment is done for diesel engine pump part made of the three ductile cast irons. Finite element calculation is done to get elastic stress concentration factor, Kt, and plastic notch factor Kp. Neuber ´s rule is used to determine local stress at notch subjected to constant amplitude load test and variable amplitude loading. The constant amplitude loading is conducted at a stress ratio of R=0 on the pump part. The test results show that fatigue life assessment based on the material constants is accurate. On the basis of the accuracy of constant amplitude test results, it is possible to determine for fatigue life for variable amplitude loading which is the real loading on the pump part. The variable amplitude loading is normally standardized for computational efficiency. This standardized loading is termed as CORAL (COmmon RAil Loading) sequence. CORAL is used to calculate fatigue life of pump part and is inputted to a Fatigue Life Evaluation computer program. This program uses rain flow cycle counting method. It can be concluded that the material constants for ductile cast irons fit well which is proved by experimental tests by constant amplitude loading on pump part. Then life prediction can be done for the typical pump loading, standardized variable amplitude loading known as CORAL