Popular Abstract in Swedish Jonstråleanalys är ett fält inom tillämpad fysik vars utövare sysselsätter sig med bestrålning av olika föremål med joniserande strålning från partikelacceleratorer. Fysiker och kemister observerade i början av nittonhundratalet att joniserande strålning såsom alfapartiklar från radioaktiva källor ger upphov till olika sorters strålning när den växelverkar med materiThe overall goal of this thesis is to test new detector technologies and data acquisition systems, for use in Ion Beam Analysis IBA. This is intended to complement the existing setup, which is routinely used at Lund Ion beam Analysis Facility LIBAF. Proton induced X-ray emission is a well-known method for trace element analysis of heavier elements, but trace element analysis of elements below alum

Synthesis of operating procedures for batch plants involves systematic generation of step by step instructions which the operator can implement to manage the batch plant safely and optimally. This is a labor and knowledgeintensive task. It often takes weeks of effort by experts to prepare a clear and error free set of instructions even for a moderately complex plant. If this process is automated,

The aim of this study was to systematically evaluate the potential of static MR Imaging in congenital heart disease. As low field equlpment was first avaliable, and contlnues to be used, the experienee with this type of imager is reported. Accurate parameter setting is of the greatest importance for efficient cardiac scanning. In small experimental animals, ECG gating and number of excitations we

Denna uppsats markerar ett nytt och kompletterande spår i Certecs verksamhet: att i datormodellens form simulera mänskligt lärande. Förhoppningen är att det därigenom skall komma fram nya idéer både om lärande och om pedagogiska möjligheter kring hur man kan stötta lärandet. Certec kommer att medverka till att den nya kunskapen i första hand skall komma människor med inlärningssvårigheter till god

Popular Abstract in Swedish Markfosfor och mångfald av växter i svenska gräsmarker – en populärvetenskaplig sammanfattning Olika typer av gräsmarkshabitat innehåller en stor och viktig del av mångfalden av växtarter i Skandinavien och i norra Europa. En stor del av arterna är knutna till kulturlandskapet och des's äldre hävdformer. Förändringar i användning och skötsel av gräsmarkerna under detThe semi-natural grassland habitats contain an important part of the plant diversity in Europe. Changes in farming practices have lead to drastic decreases in plant species richness. The aim of the present thesis is to contribute to the knowledge about mechanisms governing the plant species richness in grasslands with emphasis on soil nutrients. Most species rich grasslands are found on soils with

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Learning is a highly individual process. Some prefer learning by reading the course material, others learn best by listening to a lecture, whilesome like to learn in a trial-and-error way by themselves in a laboratory assignment. A good learning scheme is individual. A scheme that is good for some persons might not at all be good scheme for someone else. It is important to understand your own pers

The effect of phosphate (P ( i )) concentration on the growth behavior of Saccharomyces cerevisiae strain CEN.PK113-5D in phosphate-limited batch and chemostat cultures was studied. The range of dilution rates used in the present study was 0.08-0.45 h(-1). The batch growth of yeast cells followed Monod relationship, but growth of the cells in phosphate-limited chemostat showed change in growth kin

Conventionally, the spacing between adjacent elements in an antenna array are set at half-a-wavelength in order to obtain maximum spatial resolution while avoiding spurious sidelobes. However, for antenna arrays that are implemented in a compact manner, the spacing between the adjacent elements can be significantly less than half-a-wavelength. The small spacing between the antennas results in stro