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Popular Abstract in Swedish Intresset för biobränsle som en alternativ energiresurs har ökat eftersom utsläppen av CO2, NOx och SO2 bör sänkas. Användningen av biobränsle i en trycksatt fluidiserad bädd förbrännare/förgasare är därför en teknik som är lovande. En fluidiserad bädd har en rad fördelar såsom effektiv värmeöverföring, bränsleflexibilitet och låg förbränningstemperatur. Trots sina fördIncreasing awareness of the need of reducing CO2, NOx and SOx emissions from combustion systems has led to a strong interest in biomass as a fuel source. Using it in combination with fluidised bed combustion technology can lead to a lowering of NOx emissions to the atmosphere. However, this is not a problem-free technique, since the flue gas can contain ammonia, NOx and tar. The fluidised bed can

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Abstract in UndeterminedOur world is changing and cities and regions are increasingly understood not only asplaces, but also as vital hubs in national and global networks, through which people,capital, goods and services flow to ensure the functioning of society, as we know it. Peopleand capital are increasingly concentrated in these hubs, which aside of positive effects onefficiency also is assoc

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We present some results of the rigorous mathematical theory regarding scattering and propagation problems in chiral media, both in the frequency and the time domain.

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We present the results of realistic N-body modelling of massive star clusters in the Magellanic Clouds, aimed at investigating a dynamical origin for the radius-age trend observed in these systems. We find that stellar-mass black holes, formed in the supernova explosions of the most massive cluster stars, can constitute a dynamically important population. If a significant ensemble is retained (her

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In this paper we analyze two-dimensional (2D) pilot-symbol assisted modulation (PSAM) for wireless orthogonal frequency-division multiplexing (OFDM). 2D-PSAM has been suggested for wireless OFDM by several authors and is included in a preliminary draft of the standard for European digital video broadcast. We generalize the analysis of single-carrier PSAM to the 2D time-frequency lattice of OFDM. W