Refine
Year of publication
- 2005 (303) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (48)
- Fachbereich Maschinenbau und Mechatronik (43)
- Fachbereich Luft- und Raumfahrttechnik (41)
- Fachbereich Energietechnik (39)
- Fachbereich Wirtschaftswissenschaften (29)
- Fachbereich Elektrotechnik und Informationstechnik (25)
- IfB - Institut für Bioengineering (24)
- Fachbereich Chemie und Biotechnologie (20)
- Fachbereich Bauingenieurwesen (18)
- INB - Institut für Nano- und Biotechnologien (17)
Language
- German (170)
- English (130)
- Portuguese (2)
- Spanish (1)
Document Type
- Article (188)
- Conference Proceeding (37)
- Book (30)
- Lecture (18)
- Part of a Book (12)
- Patent (6)
- Other (3)
- Part of a Periodical (3)
- Doctoral Thesis (2)
- Diploma Thesis (1)
Keywords
- Rapid Prototyping (6)
- Übungsklausur (5)
- Aachen University of Applied Sciences (3)
- Bauingenieurwesen (3)
- CAD (3)
- Fachhochschule Aachen (3)
- Fertigungsverfahren (3)
- Regelungstechnik (3)
- civil engineering (3)
- Karosseriebau (2)
Brühl: Max Ernst Museum
(2005)
Das Bild im Kopf
(2005)
Das Drallrohr
(2005)
Um líder excelente está disposto a partilhar a liderança do grupo, a fim de iniciar o desenvolvimento de nosso Team. Pois: Um grupo somente alcançará sua plenipotência, se o seu líder estiver disposto a partilhar a liderança. Em princípio, múltiplos conteúdos podem – em diferentes seqüências – ser tema de um desenvolvimento de Team. Pela experiência, os seguintes temas são os que apresentam os temas difíceis para a eficácia do Team, que necessitam ser tratados. Para cada tema de desenvolvimento é importante tratar de cada um dos passos seguintes no grupo como um todo, para se assegurar uma realização duradoura na prática do grupo.
Digitale Regelungstechnik
(2005)
In the new European standard for unfired pressure vessels, EN 13445-3, there are two approaches for carrying out a Design-by-Analysis that cover both the stress categorization method (Annex C) and the direct route method (Annex B) for a check against global plastic deformation and against progressive plastic deformation. This paper presents the direct route in the language of limit and shakedown analysis. This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for mechanical and thermal actions. One observation from the examples is that the so-called 3f (3Sm) criterion fails to be a reliable check against progressive plastic deformation. Precise conditions are given, which greatly restrict the applicability of the 3f criterion.
After a short introduction of a new nonconforming linear finite element on quadrilaterals recently developed by Park, we derive a dual weighted residual-based a posteriori error estimator (in the sense of Becker and Rannacher) for this finite element. By computing a corresponding dual solution we estimate the error with respect to a given target error functional. The reliability and efficiency of this estimator is analyzed in several numerical experiments.
The ClearPET® scanners developed by the Crystal Clear Collaboration use multichannel PMTs as photodetectors with scintillator pixels coupled individually to each channel. In order to localize an event each channel anode is connected to a comparator that triggers when the anode signal exceeds a common predefined threshold. Two major difficulties here are crosstalk of light and the gain nonuniformity of the PMT channels. Crosstalk can generate false triggering in channels adjacent to the actual event. On the one hand this can be suppressed by sufficiently increasing the threshold, but on the other hand a threshold too high can already prevent valid events on the lower gain channels from being detected. Finally, both effects restrict the dynamic range of pulse heights that can be processed. The requirements to the dynamic range are not low as the ClearPET® scanners detect the depth of interaction by phoswich pixels consisting of LSO and Lu0.7Y0.3AP, two scintillators with different light yields. We will present a model to estimate the achievable dynamic range and show solutions to increase it.