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Iterative decoding of generalized low-density parity-check codes

A generalization of Gallager's low-density parity-check codes is introduced, where as component codes single-error correcting Hamming codes are used instead of single-error detecting parity-check codes. Low-density (LD) parity-check codes were first introduced by Gallager in 1963. These codes are, in combination with iterative decoding, very promising for achieving low error probabilities at a rea

Street canyon microclimate in traditional and modern neighbourhoods in a hot dry climate - a case study in Fez, Morocco

The urban climate can vary considerably within cities. In a hot and dry climate, the micro¬climate at street level depends to a large extent on the urban geometry and building density. To be able to plan and design comfortable urban areas in the future, it is important to understand how different urban textures influence the climate. This paper deals with a case study in Fez, Morocco, where climat

Dispossession, displacement and human security

Dispossession and displacement have made their imprint on the lives of uncounted millions, and continue to pose the gravest threat to security for many more. The ascent of neoliberalism to global hegemony in recent decades – in all its multifarious and contextually path-dependent varieties – has radically changed the landscape of human vulnerability and security. Its successes in massive global an

Effect of water contamination on the diffused content of hydrogen under stress in AISI-52100 bearing steel

Popular Abstract in Swedish Abstract Hydrogen embrittlement is a degradation process of mechanical/tribological properties (toughness, wear etc.) of mating steel surfaces. This is caused by the presence and interaction of hydrogen with applied stresses. Therefore, it is important to quantify the hydrogen content which could be dissolved under applied stresses in steel. Water contamination of lubriAbstract Hydrogen embrittlement is a degradation process of mechanical/tribological properties (toughness, wear etc.) of mating steel surfaces. This is caused by the presence and interaction of hydrogen with applied stresses. Therefore, it is important to quantify the hydrogen content which could be dissolved under applied stresses in steel. Water contamination of lubricants is often considered as

Molecular aspects of pheromone evolution in moths

Moths rely on the sense of smell (olfaction) as the main sensory input system in search for potential food sources and in selection of suitable females by males. Specific pheromones are fundamental to the reproductive isolation of species and consequently the olfactory system of moths has evolved to a high level of sensitivity and specificity. This thesis investigates differences between two phero

Skolan och familjen – en modell för salutogent samspel

Att det ska finnas en psykolog i skolans elevhälsa är på förslag från regeringen. Men vad är psykologens uppgifter i skolan? Denna första svenska antologi tar upp de organisatoriska och juridiska/etiska ramarna kring psykologens arbete i skolan, psykologens del av skolans samhällsuppdrag, relationer med elever och familjer, med skolan som organisation såväl som med det omgivande samhället. Psykolo

Välfärdsgapet - EUs sociala utmaning

Kampen mot fattigdom och socialt utanförskap är en av EU:s topprioriteringar efter den globala finanskrisen. Genom Europa 2020-strategin åtar sig unionen att lyfta minst 20 miljoner européer ur fattigdom. Utvecklingen i krisländerna har dock gått i motsatt riktning och de ekonomiska skillnaderna mellan EU:s medlemsstater fortsätter att öka. Är ett bestående välfärdsgap på väg att etablera sig mell