Sökning: "hur långt är ett nu"

Visar resultat 6 - 10 av 53 avhandlingar innehållade orden hur långt är ett nu.

  1. 6. Ecological interactions in human modified landscapes : Landscape dependent remedies for the maintenance of biodiversity and ecosystem services

    Författare :Arvid Bolin; Biodiversitet; []
    Nyckelord :Central place foraging; Agriculture; Competition; Ecosystem service; Species coexistence; bumble bees; landscape ecology; Biodiversity; Agri-environment scheme; Central place foraging; jordbruk; konkurrens; landskaps ekologi; humlor; bin;

    Sammanfattning : Modern agricultural practices have led to an intensification of the agricultural landscape which has negatively affected both biodiversity and the ecosystem services it provides. In my thesis I have used ecological theory of optimal foraging to try and explain how landscape structure, landscape composition and agricultural management can explain the loss of biodiversity and how remedies can efficiently be implemented. LÄS MER

  3. 7. Konsten att leva längre : Föreställningar om livets förändring i handböcker 1700-1930

    Författare :Janicke Andersson; Kenneth Petersson; Inga Sanner; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Ageing; normality; historical sociology; deviance; technologies of the self; nature; culture; science; medicine; health; prolongevity; Åldrande; normalitet; avvikande; självtekniker; natur; kultur; vetenskap; medicin; hälsa; prolongevitet; historisk-sociologi; Social anthropology; Socialantropologi;

    Sammanfattning : The aim of this thesis is to explore discursive changes in conceptions of life course and ageing. I am particularly concerned with the relationship between knowledge and power in the distribution of prolongevity and body- technologies, and as referential frame in the definition of normal and deviant bodies and behaviour. LÄS MER

  4. 8. New Approaches to Large-Scale Electronic Structure Calculations

    Författare :Francesco Aquilante; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical chemistry; orbital localization; electron correlation; analytic gradients; Cholesky decomposition; density fitting; quantum chemistry; Teoretisk kemi; kvantkemi;

    Sammanfattning : Recent years have witnessed a growing interest of the scientific community for the use of ab initio and density functional theory methods in theoretical studies of molecules containing many atoms. However, the `scaling wall' of some of the most accurate of such methods is often an obstacle for their applicability to systems of real-life interest, e. LÄS MER

  5. 9. Basal Vertebrate Divergences from a Molecular Perspective

    Författare :Ann-Sofie Rasmussen; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mitochondrial genomes; Agnatha; Chondrichthyes; vertebrates; evolution; systematics; Genetics; cytogenetics; Genetik; cytogenetik;

    Sammanfattning : Fishes (Superclass Pisces) constitute the most numerous and morphologically diverse vertebrate group, yet only a small fraction of all molecular evolutionary studies concern piscine evolution. This thesis aims to investigate the vertebrate tree, through the analysis of mitochondrial (mt) DNA sequences. LÄS MER

  7. 10. Low-Power Nanowire Circuits and Transistors

    Författare :Anil Dey; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis explores several novel material systems and innovative device concepts enabled by nanowire technology. State-of-the-art fabrication techniques such as electron beam lithography and atomic layer deposition are utilized to achieve high control and quality in the device fabrication. LÄS MER