We derive an approximation for the throughput of strongly interfering frequency-hopping wireless networks, where packet collisions always result in lost data. A system is defined to consist of a certain number of radio networks, each with an arbitrary number of communicating units, coordinated to communicate without interference. Using the approximation, we estimate upper and lower bounds on syste

Starting with the assumption that perception is not merely a reaction to outside stimulation but a process of creation, although mostly brief and inaccessible to conscious retrieval, the present paper attempts to determine the prerequisites of a stable and secure accout of reality. The authors’ leading hypothesis is that a dependable end product of adaptive and constructive processes is contingent

Popular Abstract in Swedish Människor har i alla tider försökt reparera och ersätta skadade vävnader i kroppen. Förr användes naturliga material som t. ex. bomull, silke, tagel och läder. Under 1900-talet har flera syntetiska (konstgjorda) material utvecklats, framförallt olika typer av polymerer (plaster), för användning som ersättning av skadade kroppsvävnader. Beroende på vilken typ av vävnad sThe aim of this work was to achieve surface modification of two biomedical polyurethanes and one poly(urethane urea) through the addition of small amounts of amphiphilic copolymers in solution. The matrix polymers used were the poly(ether urethane)s Pellethane 2363-80AE (P80) and 2363-75D (P75) and a poly(ether urethane urea) similar to Biomer (PUUR). The amphiphilic additives consisted of segment

Detta är det andra fristående bandet av Lunds Botaniska Förenings praktverk om floran i Skåne och utgör resultatet av Projekt Skånes Flora - den inventering av landskapets kärlväxtflora som startade 1990. I Arterna och deras utbredning presenteras de mer än 3600 växter som någon gång påträffats som vildväxande i Skåne. Under Projekt Skånes Flora har 2800 olika växter blivit funna i landskapet och

An old building belonging to the Royal Netherlands Academy of Arts and Sciences, situated on the bank of Amsterdam's Kaisergracht canal, formed the home of a small research department specializing in the study of dialects and Dutch folk culture up until 1988. Excerpts, records, photos and drawings were collected here in these run-down premises. It was a relatively closed setting, not highly ranked

Popular Abstract in Swedish Många människor förespråkar en egalitär norm. I detta ingår att man ska bemöta människor på lika villkor och inte låta sig påverkas av irrelevanta faktorer som människors etniska ursprung, sexuella läggning eller norska brytning. Forskning visar dock att vi människor tenderar att tänka i termer av kategorier, och detta gäller även hur vi uppfattar andra människor. Vi ärThis thesis explores in-group bias control. It is well-known that people tend to have extra liking for people they identify themselves with. An extra positive in-group attitude may cause discrimination, even in the absence of any negative attitudes towards the out-group. At the same time are many people motivated to behave and present themselves as unbiased. We study whether people attempt to cont

Abstract is not available

The book is a part of the result of a project, funded by HSFR (The Swedish Council for Research in the Humanities and Social Sciences). In general it comprises the art criticism in the Swedish daily press from 1990-2000. The studies have a common focus on the text of the art criticism, in contrast to older research on art criticism, which uses the text primarily as a source of knowledge about the