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Lars Ahlins väg till författarskapet.
Channel models for ultrawideband personal area networks
This article describes the modeling of ultra-wideband wireless propagation channels, especially for the simulation of personal area networks. The IEEE 802.15.3a standards task group has established a standard channel model to be used for the evaluation of PAN physical layer proposals. We discuss the standard model, the measurements that form its basis, and the possibilities for future improvements
Modelling steam drying of a single porous ceramic sphere: Experiments and simulations
In order to investigate and describe the drying kinetics occurring in a porous material during superheated steam drying, a model was developed based on the fundamental transport equations for mass and heat. The driving forces in the model are gradients of moisture, temperature and pressure. The transport coefficients employed were either measured experimentally or were derived theoretically from t
Indoor climate simulations for glazed office buildings in Sweden
The NorduGrid project: using Globus toolkit for building GRID infrastructure
The NorduGrid is the pioneering Grid project in Scandinavia. The purpose of the project is to create a Grid computing infrastructure in Nordic countries. The cornerstone of the infrastructure adopted at NorduGrid is the Globus toolkit developed at Argonne National Laboratory and University of Southern California. It is, however, missing several important high-level services. With the need to provi
Ekonomistyrning i Lund - Sveriges bästa skolkommun
Stora summor omsätts i skol- och barnomsorgen. År 2004 stod barnomsorgen för 13 % och skolan för 32 % av kommunerna bruttokostnader på 375 miljarder kronor (SKL, 2005). Tillsammans är verksamheterna de största kommunala kostnadsposterna, följt av vård och omsorg som förbrukar 40 % av bruttokostnaderna. Naturligtvis blir skolans ekonomistyrning viktig i ett sådant sammanhang. I denna artikel beskri
Alfhild Tamm tidig expert på språkstörningar hos barn
Identification of novel transcription factor-like gene from human intestinal cells
Intestinal crypt epithelial T84 cells form luminal structures and differentiate to intestinal enterocyte-like cells in response to IMR-90 fibroblast-secreted transforming growth factor-beta when grown within three-dimensional collagen gel. In search of TGF-beta regulated genes involved in this differentiation process, we isolated a TGF-beta downregulated cDNA, human homologue of rat apoptosis anta
"at jag syntes skrifwa en fijn styl": Swedenborg och skrivakten
Analysis of Emanuel Swedenborg and his conceptual understanding of writing
Costs for screening, intervention and hospital treatment generated by the Malmö Preventive Project: a large-scale community screening programme.
OBJECTIVES: The purpose of this study was to estimate retrospectively the costs of health care resources used in the Malmö Preventive Project, Sweden and estimate the costs of in-patient care that were avoided because of early intervention. SETTING AND SUBJECTS: A large-scale community intervention programme was conducted from 1974 to 1992 in Malmö, Sweden with the aim of reducing morbidity and mo
Macrophage Activation and AP-1 in Atherosclerosis
High levels of very low density lipoprotein (VLDL) and intermediate density lipoprotein (IDL) have been identified as independent risk factors for coronary heart disease. Hypertriglyceridemia is generally associated with an increased expression of inflammatory makers and inflammation is thought to contribute to atherosclerosis and its complications. The present investigation was aimed at providing
Uppåkra - Lund före Lund
Diffusion of a mixture of cations and anions dissolved in water
In service life modeling of concrete, the ion transport in the pore solution is crucial. The main deterioration phenomena associated with ions in the pore solution are (1) corrosion due to external chloride ions reaching the embedded reinforcement bars; (2) carbonation due to presence of dissolved carbon dioxide (which will form carbonic acid with water) supplied from the surrounding air; and (3)
Review of fungus gnats in the genus Tarnania Tuomikoksi, with a phylogeny of the Rymosia s.l. genus group (Diptera : Mycetophilidae)
The four known species of Tarnania Tuomikoski are reviewed, viz. T dziedzickii (Edwards, 1941), T. fenestralis (Meigen, 1818), T. nemoralis (Edwards, 1941), and T. tarnanii (Dziedzicki, 1910). Males and females are re-described, photographed and their terminalia figured. An attempt is made to homologize and name specific substructures of the male gonostylus, widely recognizable within the tribe Ex
Perceptual Surface Reconstruction
How does the brain transform the 2-D light arrays in our eyes into a meaningful 3-D description of surfaces around us? What assumptions does the visual system make about the world when information is incomplete? And how are these assumptions computationally expressed in this perceptual reconstruction process? These questions, and other aspects of binocular depth perception are analysed from a theo
Longitudinal bone loss in postmenopausal women with primary biliary cirrhosis and well-preserved liver function.
Preattentive bias for snake words in snake phobia?
Stroop interference and skin conductance responses (SCRs) for words related to snakes, spiders, flowers, and mushrooms were studied in a group of women (n=40) with snake phobia who were randomised to a stress or no-stress condition. The 21 low-stress snake phobics showed Stroop interference for unmasked (but not for masked) snake words, compared with 21 age- and sex-matched controls. Stroop interf
A model for the absorption of sulphur dioxide into a limestone slurry
A model has been developed for the removal of sulphur dioxide from flue gas by absorption into a limestone slurry. The flue gas desulphurization unit consists of an absorber tower and an oxidation tank. Flue gas enters the absorption tower at the bottom and meets the limestone slurry. There are five important chemical reactions with a finite rate. The rate-limiting reactions are limestone dissolut
Visibility of current and shot noise in electrical Mach-Zehnder and Hanbury Brown Twiss interferometers
We investigate the visibility of the current and shot-noise correlations of electrical analogs of the optical Mach-Zehnder interferometer and the Hanbury Brown Twiss interferometer. The electrical analogs are discussed in conductors subject to high magnetic fields where electron motion is along edge states. The transport quantities are modulated with the help of an Aharonov-Bohm flux. We discuss t