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The Bremmer series for a multi-dimensional acoustic scattering problem

The Bremmer series is used to reduce a complex scattering problem to a sequence of simpler single scattering problems. In the Bremmer series, the wave equation is first decomposed into a coupled system of one-way wave equations. The system is then decoupled into a sequence of one-way wave equations with a fixed point iteration. In this paper, a left symbol representation of the decomposition opera

Mircostructure and rheological properties of concentrated tomato suspensions during processing

Food processing comprises operations such as dilution (changing the concentration), homogenisation (changing the particle size), and subsequent pumping (shearing), among others. It is thus of great interest to gain a better understanding of the mechanisms governing the creation and disruption of structures during these engineering operations, and the way in which they are related to the textural a

The influence of soil pH on plant and microbial communities in sandy grasslands

Popular Abstract in Swedish Ovan jord & under ytan Sandstäpp är en hotad växtmiljö eftersom arealen av sandstäpp minskat avsevärt sedan Linnés tid (1700-talet). Vi ställde oss frågan varför den har minskat. För att kunna besvara den måste vi förstå vad växtarterna behöver och förstå hur kemin i marken fungerar. Dessutom vill vi lära oss hur markens organismer påverkas av minskningen av sandstSandy, calcareous grasslands are species rich temperate semi-natural grasslands. The species composition in 136 plots was analysed in relation to soil chemistry parameters; extractable P and N, soil pH and lime content. We found that that acidification and decalcification decrease species diversity and the number of red-listed species in these sandy grasslands. The microbial community was investig

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This article investigates the phenomenon of 'shifts in desire' amongst students of gender studies at five universities in Sweden. Taking its starting point in a fascination of the subversive political potential of challenging the predominant discourse of sexual essentialism it examines which aspects of gender studies my informants attach importance to when relating them to their shifts in desire.

Design Considerations for Solid Oxide Fuel Cell Auxiliary Power Units for Luxury Passenger Vehicle

SOFC systems, working at high temperatures of about 800°C, have recently attracted significant interests for application as automotive and stationary power supply systems. This paper explores the possibilities and limitations for achievement of solid oxide fuel cells (SOFCs) as 7 kW auxiliary power units on luxury passenger vehicles operating on diesel fuel. Various issues are discussed, e.g., the