Berechnung der Schallausbreitung auf Schiffen Schlussbericht

A new method for the computation of sound propagation in ships is presented. Using the method, the transmission of structure-borne sound can be predicted based on Finite-Element models generated for strength and low frequency vibration purposes. The method is based on the computation of the noise energy distribution across the ship. It uses both discrete energy relations at discontinuities and differential equations for the energy distribution in homogeneous or numerically homogenized plates. The method was applied to selected ships and parts of ships and was verified by comparing predictions to large scale measurements and high frequency vibration calculations. (orig.)Available from TIB Hannover: RR 6875(98112)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Ritual efficacy in the making

International audienceAs a contribution to the much debated problem of ritual efficacy, this article aims to present a technological approach to ritual theory. In most scholarly studies of ritual, analyses of the material setting are avoided in favour of a focus on symbolic expression, cultural representations, or embodied cognition. Here a close look at the interplay between substances, sounds, smells, elementary actions on matter and supernatural forces shows that there is a blending phenomenon between myth, rite and technique at the early stages of the preparatory phases as well as during the ritual action itself. The central part played by technical actions and interaction with matter in the ritual of Samoan tattooing is a case study for a technological approach to ritual efficacy