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Concerns are increasing about the loss of biodiversity under land use change and how this will affect the ecosystem services provided by natural and semi-natural communities and consequently how this will threaten human well-being. The thesis examines the impact of present and past land use on different aspects of biodiversity; namely species diversity, traits and functional diversity and on ecos
Popular Abstract in Swedish Plasmasprutning är en process för beläggning av tunna skikt av olika material såsom metallegeringar, polymerer och keramer. Användningsområdena är åtskilliga, från titanstekpannor till oxidationskydd och värmeisolerande skikt i JAS planets motor. Plasmasprutnings processen genererar en plasmalåga när en gas, vanligtvis argon, sönderdelas mha elektrisk energi. PlasmalågaThe aim of this thesis is to enhance the overall understanding of the plasma spray process and increase control and reproducibility of the coating properties. This was performed by establishment of relationships between controllable process parameters, in-flight properties of the injected particles (velocity and temperature), and microstructure properties. The relationships were used to establish
TiO2(B) crystals were found to be isomorphic with those of its precursor, K2Ti4O9. The former crystals had a large number of facetted voids, 3–30 nm, formed as a result of the removal of potassium and water in preceding hydrolysis and calcination steps, respectively. TiO2(B)-supported vanadium oxide catalysts with loadings in the range 0.25−10 theoretical layers were prepared by impregnation of th
Popular Abstract in Swedish Jorden är ett ytterst komplext och dynamiskt system. Livet har format planeten och utvecklats i takt med förändrade livsvillkor. Ekosystemen kontrolleras i hög grad av klimatet. Snabbt förändrade villkor innebär betydande påfrestningar för åtskilliga arter och ekosystem, inklusive planetens mest dominerande art, människan. Avhandlingens huvudfokus är att undersöka samsThe Earth is a highly complex and dynamic system. Life has shaped the entire planet and evolved in response to living conditions. Ecosystems are heavily affected by climate. Rapidly changing conditions imply considerable stress on several species and ecosystems, as well as to the most dominant species on the planet. The main focus of this thesis is to investigate climate and anthropogenic interac
This paper presents new versions of the McEliece PKC that use time-varying convolutional codes. In opposite to the choice of Goppa codes, the proposed construction uses large parts of randomly generated parity-checks, presumably making structured attacks more difficult. The drawback is that we have a small but nonzero probability of not being successful in decoding, in which case we need to ask fo
Analysis of interconnected dynamical systems is considered. A framework for the analysis of stability of the interconnection is given. The results of Fax and Murray that studies the SISO-case for a constant interconnection matrix are generalized to the MIMO-case where arbitrary interconnection is allowed. The analysis shows the existence of a separation principle that is very useful in the sense o
A theoretical review of the concept of vendor managed inventory is presented. The objective with the study is two fold. First of all the study tries to sort out the different terms connected with VMI and secondly former research about the VMI concept is presented.
This study shows how locally observed geomagnetic disturbances can bepredicted from solar wind data with artificial neural network (ANN)techniques. After subtraction of a secularly varying base level, thehorizontal components XSq and YSq of the quiettime daily variations are modeled with radial basis function networkstaking into account seasonal and solar activity modulations
Recent development in the advanced ceramic fuel cell (CFC), working at intermediate temperature 600-700
This paper describes the error-correcting capability of a convolutional code when transmitting close to capacity. We show that it is the combination of average burst length and first event error probability that allows us to better describe the error-correcting capability of a code
There is considerable evidence that children and adolescents with autistic spectrum disorders (ASD) are at increased risk of anxiety and anxiety disorders. However, it is less clear which of the specific DSM-IV anxiety disorders occur most in this population. The present study used meta-analytic techniques to help clarify this issue. A systematic review of the literature identified 31 studies invo
Popular Abstract in Swedish 2003 års Nobelpris i kemi gick till professor Peter Agre för upptäckten av aquaporinerna. Aquaporiner är proteiner som sitter i membran och bildar kanaler som tillåter vatten och andra små neutrala molekyler att passera genom membranet. Aquaporinerna utgör en mycket gammal och välkonserverad proteinfamilj som finns i alla levande organismer som hittills undersökts. VäxAquaporins, or Major Intrinsic Proteins (MIPs), are integral proteins that facilitate transport of water and other small neutral solutes across biological membranes. They belong to a well conserved and ancient family of proteins, present in all organisms ranging from bacteria to plants and humans. The aquaporin family in plants is large, indicating complex and regulated water transport within the
The greater cities’ outer transitional zones are ephemeral and dynamic. With Malmö (Sweden) as an example this paper discusses how coastal and agricultural landscapes in the urban fringe can develop into something new and closer to actual needs of the inhabitants. This is done by opening up for a use of new concepts when describing these areas, for example among planners/designers and exploiters.
