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2,060 results on '"Kessler C."'

102. Zurück in die Zukunft: Systems Engineering!

Author

Finkel, S., Märkl, S., and Kessler, C.

Subjects
Modularisierun, Agile, Product Line Engineering, Systems Engineering, Luftfahrt, Raumfahrt
Abstract

Systems Engineering (SE) beinhaltet bewährte Ansätze, um sehr neue, sehr große, sehr komplexe und typischerweise Einzelprodukte oder Missionen zu liefern (z.B. "eine bemannte Mondlandung durchführen und zur Erde zurückkehren"). Die in fast allen Branchen aufkommende Notwendigkeit, agiler, skalierbarer und profitabler zu werden, erfordert eine Auffrischung der "klassischen" Interpretation von SE. Nachfolgend wollen wir auf der Grundlage unserer Erfahrungen, Beobachtungen und Praktiken unserer Beratungstätigkeit in unterschiedlichen Industrien Teaser und Ideen für die Luft- und Raumfahrtindustrie zur Verbesserung von SE bieten. Der Schwerpunkt liegt hier auf der Kombination von SE mit agilen Ansätzen und Aspekten der Modularisierung und Wiederverwendung.

Published
2020
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105. Forskning mod en mere bæredygtig fremtid

Author

Petersen, M.F., Arsanjani, J.J., Christensen, F.K., Fibæk, C.F., Hansen, H.S., Kessler, C., Paasch, Jesper M., Schrøder, L., Stenseng, L., Petersen, M.F., Arsanjani, J.J., Christensen, F.K., Fibæk, C.F., Hansen, H.S., Kessler, C., Paasch, Jesper M., Schrøder, L., and Stenseng, L.

Published
2020

108. Evaluation of single nucleotide polymorphisms in the phosphodiesterase 4D gene (PDE4D) and their association with ischaemic stroke in a large German cohort

Author

Kuhlenbaumer, G., Berger, K., Huge, A., Lange, E., Kessler, C., John, U., Funke, H., Nabavi, D.G., Stogbauer, F., Ringelstein, E.B., and Stoll, M.

Subjects
Stroke (Disease) -- Genetic aspects, Stroke (Disease) -- Development and progression, Phosphodiesterases -- Research, Single nucleotide polymorphisms -- Research, Health, Psychology and mental health
Published
2006

134. Vibration analysis of rotors utilizing implicit directional information of complex variable descriptions

Author

Kessler, C. and Kim, J.

Subjects
Vibration research -- Reports, Rotors -- Research, Science and technology
Abstract

A complex variable description of planar motion incorporates directivity as inherent information which is therefore very convenient in vibration analysis of rotors. This paper proposes to use the directional information explicitly when the equation of motion of a rotor is formulated in complex variables. It is shown that the free vibration solution to the equation of motion formulated as such can be defined as the directional natural mode because it describes not only the shape and frequency but also the direction of the free vibration response. The directional frequency response functions (dFRFs) that have been used recently are obtained as the solution to the forced vibration solution to the equation of motion. Symmetric and anti-symmetric motions of a geometrically symmetric rigid rotor are used as examples to explain these concepts and their practical significances. The proposed approach allows clear understanding and definitions of some unique characteristics of rotor vibrations, such as the forward and backward modes, and forward and backward critical speeds, which have been often used in confusing or incorrect ways. [DOI: 10.1115/1.1467649]

Published
2002

144. Versatile high performance digital SQUID electronics

Author

Ludwig, C., Kessler, C., Steinfort, A.J., and Ludwig, W.

Subjects
Magnetometer -- Research, Superconducting quantum interference devices -- Research, Superconductivity -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Research describing 32 bit superconducting quantum interference device electronics is presented. In particular software gradiometry for multi-channel magnetometer systems is developed.

Published
2001

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