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Strategies of miniaturised reference electrodes integrated in a silicon-based „one chip“ pH sensor
(2003)
Härtebegriff im Zusammenhang mit Vernetzung, Bruchdehnung und Dauerfestigkeit eines Elastomers
(2003)
This paper presents the direct route to Design by Analysis (DBA) of the new European pressure vessel standard in the language of limit and shakedown analysis (LISA). This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for some examples from the DBA-Manual. One observation from the examples is, that the optimisation approach gives reliable and close lower bound solutions leading to simple and optimised design decision.
Structural design analyses are conducted with the aim of verifying the exclusion of ratchetting. To this end it is important to make a clear distinction between the shakedown range and the ratchetting range. The performed experiment comprised a hollow tension specimen which was subjected to alternating axial forces, superimposed with constant moments. First, a series of uniaxial tests has been carried out in order to calibrate a bounded kinematic hardening rule. The load parameters have been selected on the basis of previous shakedown analyses with the PERMAS code using a kinematic hardening material model. It is shown that this shakedown analysis gives reasonable agreement between the experimental and the numerical results. A linear and a nonlinear kinematic hardening model of two-surface plasticity are compared in material shakedown analysis.
Numerical methods for limit and shakedown analysis. Deterministic and probabilistic problems.
(2003)
Pulse shape discrimination of LSO and LuYAP scintillators for depth of interaction detection in PET
(2003)
A feasible way to gain the depth of interaction information in a PET scanner is the use of phoswich detectors. In general the layer of interaction is identified front the pulse shape of the corresponding scintillator material. In this work pulses from LSO and LuYAP crystals were investigated in order to find a practical method of distinguishing. It turned out that such a pulse processing could he kept simple due to an additional slow component in the light decay of the LuYAP pulse. At the same time the short decay time guarantees that the major amount of the light output is still collected within a short pulse recording time.
Pulse shape discrimination of LSO and LuYAP scintillators for depth of interaction detection in PET
(2003)
A feasible way to gain the depth of interaction information in a positron emission tomography scanner is the use of phoswich detectors. In general, the layer of interaction is identified from the pulse shape of the corresponding scintillator material. In this work, pulses from LSO and LuYAP crystals were investigated in order to find a practical method of distinguishing. It turned out that such a pulse processing could be kept simple because of an additional slow component in the light decay of the LuYAP pulse. At the same time, the short decay time guarantees that the major amount of the light output is still collected within a short pulse recording time.
Urkundenprozeß ohne Urkunden? Zur Zulässigkeit des Urkundenprozesses bei unstreitigem Vorbringen
(2003)
Rechtsfolgen vorbehaltloser Mietzahlung in Mangelkenntnis –Mehr als bloß eine Etappe beim BGH?
(2003)
Anmerkung zu EuGH RS C-208/00 (Niederlassungsfreiheit und Internationales Gesellschaftsrecht)
(2003)
A explicação do conceito científico de Gestão de competências mostra o valor de desenvolvimento dos subordinarios. Ferramentas práticas explicam o conceito através de experiências de empresas européias. As Competência sao os seguintes: Competência especializada, Competência Metódica, Competência social, Competência individual.
Dot net und Sun ONE - Wettbewerb oder Mitspieler? Neue Programmiermodelle machen das Web interaktiv
(2003)
Forschung & Lehre Die solare Küche Laboreinweihung am Fachbereich Bauingenieurwesen StudiengängeFacility Management – Erfolgreicher Start Energy Systems CMD Studentinnen und Studenten – Die Zukunft fest im Griff Internationales Studentenaustausch mit der Polytechnischen Hochschule Pskov, Russland Eurostudium am Fachbereich Wirtschaftswissenschaften FH-Service Rekordverdächtig – 500 000. Besucherin in der Bereichsbibliothek Eupener Straße Absolventen aufgepasst! Neue Alumni-Seite im Internet Personen Höchste Ehrung für Prof. Dr.-Ing. Hövelmann Wahlen an den Fachbereichen – Wir gratulieren der neuen Dekanin und unseren Dekanen! Personalinfo Aus den Fachbereichen Hundert Jahre Ingenieurstudium Aachener Tunnelexperte macht nicht nur NRW-Röhren sicherer