Sökning: "conservation"

Visar resultat 1 - 5 av 753 avhandlingar innehållade ordet conservation.

  1. 1. Symmetries and conservation laws

    Detta är en avhandling från Växjö : Växjö university press

    Författare :Raisa Khamitova; Växjö universitet.; Blekinge Tekniska Högskola.; Blekinge Tekniska Högskola.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Physics Other physics Mathematical physics; NATURVETENSKAP Fysik Övrig fysik Matematisk fysik; conservation law; Noether s theorem; Lie group analysis; Lie-Bäcklund transformations; basis of conservation laws; formal Lagrangian; self-adjoint equation; quasi-selfadjoint; equation; nonlocal conservation law; Conservation law; Noether’s theorem; quasi-self-adjoint equation;

    Sammanfattning : Conservation laws play an important role in science. The aim of this thesis is to provide an overview and develop new methods for constructing conservation laws using Lie group theory. The derivation of conservation laws for invariant variational problems is based on Noether’s theorem. LÄS MER

  2. 2. Population genetic analyses in the orchid genus Gymnadenia a conservation genetic perspective

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Susanne Gustafsson; Uppsala universitet.; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Genetic engineering; Orchidaceae; Gymnadenia; conservation; microsatellites; genetic structure; mating pattern; Genteknik; TECHNOLOGY Bioengineering Genetic engineering including functional genomics; TEKNIKVETENSKAP Bioteknik Genteknik inkl. funktionsgenomik; naturvårdsbiologi; Conservation Biology;

    Sammanfattning : Small populations are facing a particular risk of extinction due to a lack of appropriate genetic diversity and associated negative effects, factors dealt with in the discipline of conservation genetics. Many orchid species exhibit characteristics that make them a perfect study object in the scope of conservation genetics. LÄS MER

  3. 3. Conservation of the wood of the Swedish warship Vasa of A.D. 1628. Evaluation of polyethylene glycol conservation programmes

    Detta är en avhandling från Göteborg : University of Gothenburg

    Författare :Birgitta Håfors; Göteborgs universitet.; Gothenburg University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Anti shrink efficiency ASE ; archaeological wet site; dimensional stabilisation; conservation; osmosis; polyethylene glycol PEG ;

    Sammanfattning : The principal aim of this dissertation is to investigate whether or not polyethylene glycol (PEG) has acted as a dimension stabilizing agent of the Vasa wooden material, i.e. LÄS MER

  4. 4. In Search of Scientific Methods for Conservation of Historic Silk Costumes

    Detta är en avhandling från Göteborg : Acta Universitatis Gothoburgensis

    Författare :Johanna Nilsson; Göteborgs universitet.; Gothenburg University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; HUMANIORA; HUMANITIES; silk; artificial ageing; Queen Christina; historic costumes; conservation; ATR-FTIR; SEC; DRIFTS; tensile tests;

    Sammanfattning : The general aim of this dissertation is to lay ground for the evaluation of conservation methods for historic costumes. The Royal Armoury, Stockholm has a large number of 17th century men’s garments, many of them made of silk and in need of conservation. LÄS MER

  5. 5. Pastoralists, Mobility and Conservation Shifting rules of access and control of grazing resources in Kenya's northern drylands

    Detta är en avhandling från Stockholm : Department of Human Geography, Stockholm University

    Författare :Annemiek Pas Schrijver; Stockholms universitet.; [2019]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; pastoralism; livestock mobility; conservation; community conservancy; Northern Rangelands Trust; political ecology; access; institutions; governmentality; territoriality; Samburu; Laikipia; Isiolo; Kenya; geografi med kulturgeografisk inriktning; Geography with Emphasis on Human Geography;

    Sammanfattning : Pastoral mobility is seen as the most effective strategy to make use of constantly shifting resources. In northern Kenya, mobile pastoralism as a highly-valued strategy to manage grazing areas and exploit resource variability is becoming more complex. LÄS MER