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The fully developed laminar flow and heat transfer for ducts with rectangular and trapezoidal cross section in fuel cells have been numerically simulated with one porous wall with a uniform mass injection or suction, while the other three walls being impermeable. The new concept of thermal boundary conditions of combined constant heat flux and constant temperature on the walls was implemented. Bas
BACKGROUND: Aerosol particles have, since the antiquity, been linked to adverse effects on human health. It is estimated that the particles in urban air pollution cause at least 100,000 deaths in Europe each year, whereof 5,000 in Sweden. These figures do not include the outcomes of indoor sources or smoking, which shortens the lives of millions of people worldwide. During recent years especially
Esaias Tegnér (1782–1846), professor i grekiska vid Lunds universitet 1812–1824, därefter biskop i Växjö fram till sin död, var en av sin tids mest betydande kulturpersonligheter: en lysande diktare, en framstående talare, en dugande universitetslärare, kraftfull biskop, briljant och spirituell brevskrivare. Hans efterlämnade skrifter består av dikter och brev, samt tal hållna i olika sammanhang.The literary remains of Esaias Tegnér (1782–1846)—poet, professor, bishop—include poems, letters, and speeches. These texts are have been published in a series of scholarly editions by Tegnérsamfundet. The last volumes of the series, which will contain sermons and other ecclesiastic speeches, are due to appear in the immediate future. This was the incentive for a symposium in November 2009, held a
The pulse spin-locking sequence is a common excitation sequence for magnetic resonance and nuclear quadrupole resonance signals, with the resulting measurement data being well modeled as a train of exponentially damped sinusoidals. In this paper, we derive an ESPRIT-based estimator for such signals, together with the corre- sponding Cramér-Rao lower bound. The proposed estimator is com- putational
This paper briefly summarizes a research project aiming at analyzing the scaling up of extreme programming (XP) in a market driven context for embedded software and the integration of XP towards management processes in this context. Both the scaling of XP and market driven software development issues are not addressed by the original XP methodology as it relies on developing software by simplifyin
A method for modelling reflectionless conductive dispersive media is presented. The media are either half-spaces or finite dispersive slabs with a spatially varying impedance. The problem of finding reflectionless media for plane waves at normal incidence is formulated as an inverse problem where the constitutive relation is to be determined as a function of depth given a reflection kernel which i
The accurate quantitative analysis of high resolution ultraviolet spectra of ultra-sharp-lined early-type, chemically peculiar stars, obtained with the Goddard High Resolution spectrograph on the Hubble Space Telescope, has been made possible by the synergism between state-of-the-art astro-physics and state-of-the-art atomic spectroscopy. We illustrate this with several examples, including the dis
