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Early events in T cell development

Popular Abstract in Swedish Immunförsvaret är till för att bekämpa patogener såsom bakterier, virus, parasiter och svamp. Det kan också bekämpa cancerceller även om dessa har en förmåga att undkomma till slut. För att kunna känna igen och eliminera främmande kroppar måste immunförsvaret kunna skilja på dem och våra kroppsegna ämnen. Immunförsvaret består av vita blodkroppar. Vita blodkroppar är enT cells constitute a heterogenous population of lymphocytes. Their unifying property is that they express surface bound antigen-receptors, called T cell receptors (TCRs). The TCR is a heterodimer composed of either TCRalpha and beta chain proteins (alphabeta TCR) or gamma and delta chain proteins (gammadelta TCR). Depending on which TCR isotype that is expressed, the T cells are divided into alpha

A scalable pipelined complex valued matrix inversion architecture

This paper presents a fast, pipelined and scalable hardware architecture for inverting complex valued matrices. The matrix inversion algorithm involves, a QR-factorization based on the squared Givens rotations algorithm, the application of a recurrence algorithm for inversion of an upper triangular matrix R, and a matrix multiplication of R-1 with Q. We show that traditional triangular

EMC Aspects of PMW Controlled Loads in Vehicles

The number of electrically driven loads in a modern vehicle is constantly increasing. Many loads that former were mechanically driven will in the future be driven by electricity. This implies that a number of electronic systems have to be packed together in the limited space in a vehicle. When different electronic systems are placed close to each other, there is always a risk for electromagnetic i

Direct and indirect effects of fish predation and excretion in aquatic food webs

The aim of this thesis was to elucidate the mechanisms by which planktivorous fish can affect planktonic communities in lakes and how they may affect benthic communities through their effects on planktonic communities. In a laboratory experiment, nutrients released by fish increased algal biomass and altered phytoplankton community structure, suggesting that fish can affect phytoplankton by direct

Amphorae from Caronia and Caronia Marina, Provincia di Messina, Sicily – Thin-Section analyses

The Amphorae was a common container for transportation of especially liquid goods in the Greco-Roman world. There are several known production sites of these vessels around the Mediterranean. The shapes of the different amphorae have been amply described and grouped according to different systems. There has also been several works describing the fabric of the vessels and also attempts to link vess