November, 2008 Anna Schwarz, Johannes Janicka In the last thirty years noise emission has developed into a topic of increasing importance to society and economy. In ?elds such as air, road and rail traf?c, the control of noise emissions and development of associated noise-reduction techno- gies is a central requirement for social acceptance and economical competitiveness. The noise emission of combustion systems is a major part of the task of noise - duction. The following aspects motivate research: * Modern combustion chambers in technical combustion systems with low pol- tion exhausts are 5 - 8 dB louder compared to their predecessors. In the ope- tional state the noise pressure levels achieved can even be 10-15 dB louder. * High capacity torches in the chemical industry are usually placed at ground level because of the reasons of noise emissions instead of being placed at a height suitable for safety and security. * For airplanes the combustion emissions become a more and more important topic. The combustion instability and noise issues are one major obstacle for the introduction of green technologies as lean fuel combustion and premixed burners in aero-engines. The direct and indirect contribution of combustion noise to the overall core noise is still under discussion. However, it is clear that the core noise besides the fan tone will become an important noise source in future aero-engine designs. To further reduce the jet noise, geared ultra high bypass ratio fans are driven by only a few highly loaded turbine stages.

November, 2008 Anna Schwarz, Johannes Janicka In the last thirty years noise emission has developed into a topic of increasing importance to society and economy. In ?elds such as air, road and rail traf?c, the control of noise emissions and development of associated noise-reduction techno- gies is a central requirement for social acceptance and economical competitiveness. The noise emission of combustion systems is a major part of the task of noise - duction. The following aspects motivate research: * Modern combustion chambers in technical combustion systems with low pol- tion exhausts are 5 - 8 dB louder compared to their predecessors. In the ope- tional state the noise pressure levels achieved can even be 10-15 dB louder. * High capacity torches in the chemical industry are usually placed at ground level because of the reasons of noise emissions instead of being placed at a height suitable for safety and security. * For airplanes the combustion emissions become a more and more important topic. The combustion instability and noise issues are one major obstacle for the introduction of green technologies as lean fuel combustion and premixed burners in aero-engines. The direct and indirect contribution of combustion noise to the overall core noise is still under discussion. However, it is clear that the core noise besides the fan tone will become an important noise source in future aero-engine designs. To further reduce the jet noise, geared ultra high bypass ratio fans are driven by only a few highly loaded turbine stages.

Der Band fasst die Beitrage zu einem Symposion zusammen, das die Europa-Universitat Viadrina in Frankfurt (Oder) zu Ehren ihres ehemaligen Rektors Hans N. Weiler veranstaltet hat. Behandelt werden die zentralen Fragen einer moglichen Reform der Universitaten, wie sie zur Zeit die Diskussion bestimmen."

Das Buch gibt einen regional- und unternehmenssoziologischen Einblick in die Transformationswerkstatt ostdeutscher und polnischer Unternehmensgrunder im klein- und mittelstandischen Wirtschaftssegment. Umfassende Interviews und Fallstudien in verschiedenen Branchen (Informationstechnik, Bau, Textil) bilden das anschauliche Material, an Hand dessen kognitive und biografische Ressourcen fur die Herstellung von Vertrauensbeziehungen, Kooperationen und Unternehmensvernetzungen in ihrer Wirkungsweise detailliert analysiert werden. Die jeweiligen regionalen Handlungsbedingungen und Interaktionskonstellationen sowie die durch sie ermoglichten Begegnungen und Lernprozesse der okonomischen Basisakteure erweisen sich als wichtige Faktoren fur die Mobilisierungsfahigkeit sozialen Kapitals gerade in ostmitteleuropaischen Transformationsregionen."