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During B lymphocyte development, the transcriptional activity of the IgH locus is subject to spatial and temporal changes. The 3' enhancer (3'E) has been suggested to play an important role in regulation of immunoglobulin gene expression late in B cell development. We have investigated, using transgenic mice, the role of the 3'E in regulating Ig gene expression. Mice harbouring a rearranged IgH ge
Den här uppsatsen skall undersöka några av företeelserna som har betydelse för ett skapande av en europeisk identitet och ett "gemensamt" Europa. Diskussionen om Europa som gemensam institution handlar oftast om ekonomiska svårigheter, sällan diskuteras t.ex. historiska, normativa, och kulturella mellanmänskliga och mellanstatliga dilemman i större sammanhang. Frågan jag ställer i uppsatsen tar ju
This article presents a linear, iterative method to solve the eye-to-hand calibration problem between a wrist-mounted laser scanner and the tool flange of a robot. Measurement data are acquired from a set of non parallel planes whereafter the plane equations and desired rigid transformation matrix are found in a two-step, iterative fashion. The method is shown to handle large error in the initial
A gas-phase method has been developed for producing size- and composition controlled nanoparticles of binary alloys. The constituent elements are evaporated sequentially, with size selection after the first and second stages. In this paper, we study the Au-In system in compositions ranging from pure Au to 70 atomic percent In. Transmission electron microscopy was used to study morphology and struc
Abstract is not available
The present study is concerned with the impact of psychological factors, particularly character traits and attitudes, on the traffic accident patterns of young drivers. 101 drivers completed a questionnaire consisting of 206 questions and statements. Factor analysis was used to identify and eliminate non-significant test items, leaving 70 statements defining 14 distinct traits. Age and sex were sh
En del personer går upp i vikt, andra inte. En viktig förklaring är överkonsumtion, men det finns också andra: låg ämnesomsättningshastighet, hög insulinkänslighet, låg energikostnad vid rörelse och låg fettförbränning. Alla dessa fenomen styrs av våra hunger- och mättnadssignaler. I boken beskrivs de senaste upptäckterna om hunger- och mättnadssignaler samt belöningssystem. En kunskap som ger os
This chapter describes various kinds of artificial light sources of interest to the photobiologist (natural light is described in separate chapters), starting with incandescent lamps and their properties, and continuing with gas discharge lamps, flashlamps, light-emitting diodes, and lasers. After a section on light filters, the chapter concludes with a treatment of monochromators, in which the mo
Popular Abstract in Swedish I en alltmer konkurrenskraftig omvärld är det av störst vikt att i ett högkostnadsland som Sverige att innovera och utveckla produkter så effektivt som möjligt. För att uppnå dessa mål finns det klara indikationer på att våra nuvarande produktutvecklings- och konstruktionstillvägagångssätt saknar väsentliga egenskaper för att uppnå önskvärd effektivitet. Den frekvent mIn an industrial context when the product development cycles are shortened and constraints on technical innovations are high, it is very important to provide a very efficient and effective engineering design activity. In the current engineering design literature, most methodologies are by and large based on the so-called systematic engineering design approach. This approach is characterized by an
We investigate the application of non-convex penalized least squares for parameter estimation in the Volterra model. Sparsity is promoted by introducing a weighted !q penalty on the parameters and efficient batch and time recursive algorithms are devised based on the cyclic coordinate descent approach. Numerical examples illustrate the improved performance of the proposed algorithms as compared th
A description of the cultural landscape in the Krageholm area, southern Sweden, during the Bronze Age.
