Titlebook: Underwater Acoustics and Signal Processing; Proceedings of the N Leif Bjørnø Conference proceedings 1981 D. Reidel Publishing Company, Dord

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Scattering from Inhomogeneitiestheoretical and experimental descriptions concentrate on the smaller scatterers, especially fish, since internal waves and other wave motions will be covered else-where. A great variety of effects is listed, together with their significance for the scatterers themselves and for the resulting sonar limitations.

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A Calculation of Complex Wavenumbers of Virtual Modes in a Pekeris Modelequency (100Hz) in a Pekeris model. The propagation loss of the virtual modes in water is calculated by using the imaginary part of the wavenumbers. This result is compared with the propagation loss evaluated by the method of C.T. Tindle.

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Sigurd O. Nielsenichtsprinzip bei der Bewertung von Pensionsrückstellungen Anwendung fin­den kann. Dabei wurde der Versuch unternommen, diesen nur vage formulier­ten Grundsatz ordnungsmäßiger Buchführung in Anlehung an . stärker zu operationalisieren. Dabei wurde stets vermieden, den Ansatz einer Rech­nungsgrundlage

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Conference proceedings 1981ng place, which makes it an extre­ mely difficult task for scientists to follow-up the development in all its phases and to preserve the general view of its rapid­ ly increasing number of possibilities. The present Proceedings of the NATO ASI held in Copenhagen during August 1980 join the series of

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1389-2185 eral view of its rapid­ ly increasing number of possibilities. The present Proceedings of the NATO ASI held in Copenhagen during August 1980 join the series of 978-94-009-8449-3978-94-009-8447-9Series ISSN 1389-2185

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L. Bjørnøehrmalige Besprechung in der Presse, Erörterung dafür und dagegen zu empfehlen. Da die Verhältnisse klein und leicht übersehbar sind, ist zu erwarten, dass die Bewohner der von einer Kleinbahn durchzogenen Gegend auch auf die Betriebsführung einen Einfluss zu üben versuchen werden, und, da hier viel