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The presence of grain boundaries in the microstructure of metallic materials causes heterogeneous distributions of dislocation density. In the present contribution, the evolution of dislocation density is viewed as a reaction-diffusion system, involving mobile and immobile dislocations. Gradient effects are introduced by making the immobilization of dislocations sensitive to presence of grain boun
Is the high plateau in a ‘hat pattern’ a phonetic artefact, or does it reflect a phonological feature? Can it contrast with a low plateau, i.e., a ‘dip pattern’? The presented perception experiment supports the phonological point of view, since it shows that the dip/hat contrast can disambiguate German oder-constructions, which are interpretable as ‘alternative’ or ‘yes/no-questions’. This specifi
From a historical view point, one of the most striking features in the Caucasian languages is the preservation of archaic linguistic structures, often represented by the active alignment. These languages might have had contact with non-Caucasian languages but the contact-induced changes may not be as obvious as those in other languages in Europe. In this paper, it is argued that the preservation o
The main purpose of this work has been to investigate the fundamental dynamics of photodissociation and photo-induced isomerization reactions in the condensed phase. These "elementary" reactions have been chosen as model processes for exploring the influence of the solvent on a chemical event, as well as the factors that control this influence. Femtosecond laser spectroscopy has been employed as t
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Popular Abstract in Swedish Avhandlingen utgörs av en detaljerad studie av ett enskilt antikt byggnadsverk – Caecilia Metellas mausoleum. Detta gravmonument tillhörde en högättad romersk kvinna och är beläget intill Via Appia strax utanför Rom. Byggnaden utmärker sig bland annat genom sin storlek, men också genom sin högst ovanliga arkitektoniska utformning. Syftet med studien är att söka förstå dThe present thesis constitutes a close study of a single architectural monument, the tomb of Caecilia Metella. This is a well-preserved cylindrical tomb situated on the Via Appia outside Rome, and it is generally associated with sepulchral buildings of the traditional tumulus type. An inscription reveals that the occupant of the grave was a noble woman belonging to one of the most prestigious fami
An improved method for simultaneous purification of complement factors C3, C5 and H from human plasma has been developed. Using an initial batch separation technique with QAE-Sephadex, followed by chromatography on SP-Sephadex and gel filtration in Sephadex G-200, 600 mg of highly pure C3 can be prepared from 1600 ml of plasma. Simultaneously about 70 mg of highly pure factor H and 30 mg of C5 are
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Focusing new teacher students has at least two different implications. The students are new in the meaning of being first term students. Analyses of the recruitment to teacher education show that the new students have other social characteristics than before. During the last two decades fewer students from academic families and fewer students with high degrees from upper secondary school have ent
The mesomechanical behavior of a polycrystalline microstructure subjected to monotonic and cyclic loadings is investigated. The analysis is based on a Voronoi polygonization strategy for generation of grains embedded in a contiguous matrix. The main emphasis is to investigate the interaction between the microconstituents and the failure processes along grain boundaries. A rational interface theory
Popular Abstract in Swedish Utvärdering av stråldos och bildkvalitet i mammografi Bröstcancer är den cancerform som är vanligast hos kvinnor. Genom tidig upptäckt med bröströntgen, mammografi, kan man behandla sjukdomen i ett tidigare stadium och därmed minska dödligheten. Det är också möjligt att behandla på ett skonsammare sätt vid tidig upptäckt. Därför har man startat hälsokontroller, screeniMammography refers to the X-ray examination of the human breast, and is considered the single most important diagnostic tool in the early detection of breast cancer, which is by far the most common cancer among women. There is good evidence from clinical trials, that mammographic screening can reduce the breast cancer mortality with about 30%. The side effects include a small and age related risk
We analyze the impact of the matching network on compact MIMO systems. Existing studies have found that the matching network has a significant influence on the performance of multiple antenna systems when the antennas are in close proximity. However, none has examined the wideband case. In this paper, we investigate the wideband performance of four different matching networks for multiple dipole a
