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The performance and convergence behavior of the iterative schemes for decoding two-dimensional product codes are investigated. The decoding trajectories of the extrinsic and the a posteriori information are used as a main tool for predicting and explaining the behavior of the iterative decoding process. The component-wise optimal BCJR decoder is compared to the suboptimal max-log-MAP decoder and t
Many stream ciphers use irregular clocking to introduce nonlinearity to the keystream. We present three distinguishers on irregularly clocked linear feedback shift registers. The general idea used is to find suitable linear combinations of keystream bits, here called samples, that are drawn from a biased distribution. We describe how to place windows around the estimated positions around members
Sexual health problems are common for women with Rheumatoid Arthritis, RA. Sexual health is covered in the International Classification of Functioning, Disability and Health (ICF) by two different fields: sexual function and intimate relationships, which are included in the ICF core sets for RA. Most patients with RA are female, and there are differences concerning sexual health between women and
Popular Abstract in Swedish POPULÄRVETENSKAPLIG SAMMANFATTNING Smärtor i övre högra delen av buken och/eller gulsot är de mest vanliga symptomen relaterade till lever och gallvägssjukdomar. Den vanligaste orsaken till gallvägssjukdom är sten i gallblåsa och gallvägar som kan leda till inflammation av gallblåsa, gallvägar, lever och bukspottkörtel. Andra sjukdomar är tumörer i nämnda organ. SymptomThe diagnostic value of modern fast pulse sequences and breath-hold technique was evaluated in a prospective study of patients with suspected biliary diseases. The cost-effectiveness of MRI compared to ultrasound was calculated. Characteristics of acute cholecystitis and cholangitis were evaluated, the appearance of bile in MRCP with reference to its chemical and physical properties was studied, a
In this thesis I investigate genetic variation in clonal plants within the wind-pollinated plant family Cyperaceae and, in particular, in species of Carex. Clonal diversity and the spatial distribution of clones (genets) within populations was investigated in Carex bigelowii (in Iceland and Scandinavia) and C. arenaria (within the species' entire distributional range in W Europe). Both species re
Popular Abstract in Swedish 1: Tomas Åkerud, doktorand vid Lunds Universitet, har utvecklat en metod för att mäta hur snabbt läkemedelsmolekyler och fettsyror (de naturliga bindarna) tar sig in i och lämnar bindingsfickan i ett protein som är viktigt för fettsyrametabolismen i människa. Proteinet, adipocyt-fettsyrabindande protein (A-FABP), har som funktion att transportera fettsyror, som inte är Nuclear magnetic resonance spectroscopy (NMR) has been used to determine the kinetics of ligand binding to the adipocyte fatty acid-binding protein (A-FABP), as well as the oligomerisation and inter- and intramolecular dynamics of the low molecular weight-protein tyrosine phosphatase (LMW-PTP) in solution. NMR spectroscopy is sensitive to dynamic processes on timescales ranging from picoseconds t
We studied in chimeric EGFP-Photinus luciferase HeLa cells the expression of fluorescence and luminescence in different cell culture conditions (medium with or without Serum, static or dynamic conditions, in suspension or on microcarriers) as a model to follow the productivity of a recombinant protein. By studying the effect of Butyrate known as general but unpredictable stimulating agent for prot
Popular Abstract in Swedish Syftet med denna avhandling var att studera blandningsprocessen i statiska mixrar vid laminärt flöde och i rör vid förträngning av vätskor med olika fysikaliska egenskaper. En numerisk metod och ett tillvägagångssätt för att karaktärisera statiska mixrar har utvecklats. Med hjälp av den utvecklade metoden och numerisk strömningsberäkning (CFD) har effekten på blandningThe objective of the present work was to investigate the mixing process in static mixers under laminar flow conditions, and in pipes during the displacement of dissimilar liquids. A numerical scheme and a method of characterizing static mixers were developed. The effects of changes in geometry, flow rate, viscosity ratio and volumetric flow rate ratio on the mixing process were investigated using
Popular Abstract in Swedish Modern gastroenterologi är till stora delar helt beroende av resultat från gastrointestinal endoskopi och många av de sjukdomar som hänförs till denna specialitet kan också behandlas med modern endoskopisk och minimal invasiv teknik. Gastroskopi är förstahandsundersökning av patienter med såväl kroniska som akuta symptom från övre gastrointestinalkanalen. Den gastroskopChromoendoscopy, endoscopic tissue staining, is an adjunctive method using chemical agents applied to the mucosal surface in order to aid gastrointestinal endoscopic diagnosis and therapy. Acid producing mucosa in the GI tract may be visualized endoscopically by Congo red staining in combination with stimulation of gastric acid production. Congo red is a reactive indicator dye that changes color f
