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Attofysik handlar om att öppna ögonen för en värld som vi länge vetat fanns men fram till nu inte har kunnat se – elektronernas värld. En värld av ofattbart små och snabba förlopp och fenomen. Utvecklingen av lasertekniken har kommit så långt att vi faktiskt har möjlighet att studera den världen.
Approaches to determining the factuality of diagnoses and findings in clinical text tend to rely on dictionaries of marker words for uncertainty and negation. Here, a method for semi-automatically expanding a dictionary of marker words using distributional semantics is presented and evaluated. It is shown that ranking candidates for inclusion according to their proximity to cluster centroids of se
Popular Abstract in Swedish Fyllotaxi är läran om blad, löv, och andra växtorgans placering. Ordet fyllotaxi har sitt ursprung i de grekiska orden för 'blad' och 'organisation', och mönsterbildning i växter har studerats sedan antiken. Mönster i naturen har alltid intresserat människan och fantasieggande kopplingar till matematiken gör sig ständigt till känna. I många växter bildar växtorgan mönstThe study of phyllotactic patterns have a long history, but the bulk of our detailed understanding of developmental processes in plants comes from research conducted in the last thirty or forty years. New modern techniques have made it possible to study plants in ways that previously was not possible. Using confocal microscopy it is possible to generate three-dimensional stacks of images of a plan
This article focuses on processes of social change in Sweden, an advanced welfare state. it starts by pointing out the failure of contemporary welfare state theory to deal with the imbalance between the goal of equlality and the goal of efficiency in the production and distribution of both capital and social values. Three processes of social change are examined: the marginalization of women in the
An inverse source problem associated with a semi-linear transport or one-way wave equation in one spatial dimension is considered. It is shown an analytic solution to the inverse problem can be given and furthermore, that this inverse problem of determination of a source function is ill-posed, and must be regularised. A novel regularisation scheme which combines least squares monotone approximatio
Performance audit has become increasingly common in the public administration and every western democracy has today an independent National Audit Office (NAO). However, although the external requirements may be met, the functioning of these agencies may be jeopardized by internal and more subtle cultural factors relating to the role of the performance auditor. In Sweden, a new NAO called Riksrevis
The advent of 2.5 and 3G networks mark the beginning of the mobile Internet. The investments in these technologies will be the largest in the history of telecommunication. However, their success will largely depend on the availability of successful services and initially these will largely constitute existing services. These services all reside in the current IPv4 address space which make them ina
This thesis describes tetrapyrrole synthesis in the aerobic Gram positive bacterium Bacillus sub-tilis. Tetrapyrroles such as heme of a-, b-, c-, d- and o-type can be synthesised in this organism. In addition, there is strong evidence for the presence of the tetrapyrrole siroheme in B. subtilis. Heme b (protoheme IX) and siroheme are synthesised in ten and nine enzymatic steps, respectively, from
An ASIC implementation of the K-best Schnorr-Euchner decoder is presented for a 4/spl times/4 16-QAM MIMO system. There are several low complexity and low power features incorporated in the proposed VLSI architecture. The chip is fabricated in a 0.35-/spl mu/m CMOS technology. The chip core area is 5.76 mm/sup 2/ with 91 K gates. Furthermore, the decoding throughput that the chip can support is up
Popular Abstract in Swedish Andelen vindkraft i elnätet har ständigt ökat under de senaste åren. I många länder utgör idag vindkraften en betydande del av den totala elproduktionen. Detta gäller även vid störningar då vindkraftverk – precis som vattenkraftverk och kärnkraftverk – måste fortsätta bidra till balansen mellan elproduktion och förbrukning. De nya reglerna för anslutning av vindkraft tiSynchronous generators have always been the dominant generation type in the grid. This fact affected both planning and operation of power systems. With the fast increase of wind power share in the grid in the last decade, the situation is changing. In some countries wind power represents already a consistent amount of the total generation. Wind turbines can be classified as non-synchronous generat
Digital subscriber lines (DSL) are today one of the most important means for delivering high-speed data transmission. An emerging technique for dealing with one of the technology's most harmful problems, crosstalk, is dynamic spectrum management (DSM). DSM literature already counts with some half a dozen important solutions. These solutions can be classified according to four different aspects: op
