The small-wavector expansions for the first- and second-order exchange energy kernels (second-and third-order functional density derivatives of the exchange energy) have been investigated. Expansion coefficients are found, both in the case of a statically screened Coulomb interaction and a 'bare' interaction. The ensuing series of gradient corrections to the local density approximation (LDA) is th

This thesis addresses micromechanical modeling of materials using computational homogenization. On this topic, theoretical and computational issues are discussed, and numerical investigations of different material systems are performed. The material systems considered are; metal matrix composites, metal sheets with stiff inclusions, metal sheets containing voids, sand with inclusions of gravel and

In the context of multiple stressors such as land shortage and food insecurity, the thesis deals with gendered land and labour rights as a social aspect of food production in subsistence agriculture in sub-Saharan Africa. Using the Chiweshe communal area in Zimbabwe as an example, it identifies, investigates and draws conclusions on higher order social processes of gender, power and incremental in

In this paper. we present an analysis of different channel estimator structures that can be used and efficiently implemented with minor configuration changes of a common hardware for both LTE and DVB-H Such common estimator structures for LTE and DVB-H allow algorithm and hardware reuse when both standards are implemented on the same platform. In this approach, a core estimator will be utilized to

Popular Abstract in Swedish Produkter bestående av polymera material produceras i allt större omfattning. Materialen används därför i fler tillämpningar där deras specifika egenskaper kommer till användning. Materialens förmåga att modifieras för att passa en specifik tillämpning motiverar materialgruppens ökade betydelse. Idag används polymera material mer eller mindre i alla branscher t.ex. tranThe use of polymers and composite materials based on polymer matrix systems increases. With this raise the demands on recycling of both post-consumer and in house based material increase. The demands on the recycling process also increase. The reason is that the process more often has to be a part of the conventional production line. In order to incorporate such a process in a production line tech

Popular Abstract in Swedish I de flesta organ i människokroppen pågår en ständig förnyelse av celler för att kompensera för gamla cellers bortfall som en följd av skador och naturlig död. En ensam cell kan på egen hand kopiera allt sitt DNA och därmed all information den bär på, för att därefter dela sig och skapa en exakt identisk kopia av sig själv. Kodat i DNA finns instruktionerna för hur en oTelomeres are the end-structures of linear chromosome which are crucial for maintaining genome integrity. The telomeres prevent the DNA-repair machinery from recognizing the chromosome ends as double-strand breaks and from end-to-end fusions. The telomeres are composed by short repetitive units of TG-rich DNA and associated specialized telomere-binding proteins. Due to that replication only can

In this work, we study a flow restoration based network design problem where we assume the knowledge of possible failure situations. We use the idea of a situation disjoint path pair (nominal path, backup path) which are constructed in such a way that at least one of them is operational in any given failure situation for a flow. We present an approximate linear programming formulation of the probl

The concept of a holistic innovation policy is defined in this article, with discussions of what it is, why it is relevant, and how it can be implemented to enhance product innovation. It is shown that the innovation systems approach has diffused rapidly during the latest decades and has completely replaced the linear view in the field of innovation research. The majority of European countries are

Validering av nya utbildningar är sedan länge väletablerat inom den högre utbildningen i UK. De senaste åren har intresset ökat i Europa för validering och ett system har nylien införts i Nederländerna. Med validering avses bedömning av nya utbildningar (speciellt utbildningsprogram, degree courses), vad det gäller utbildningens innehåll, mål och resurser, för att avgöra om utbildningen kan genomf