Sökning: "selective values"

Visar resultat 1 - 5 av 113 avhandlingar innehållade orden selective values.

  1. 1. Solution-Chemically Derived Spectrally Selective Solar Absorbers : With System Perspectives on Solar Heating

    Författare :Tobias Boström; Ewa Wäckelgård; Gunnar Westin; Björn Karlsson; Peter Lund; Uppsala universitet; []
    Nyckelord :Materials science; solar; thermal; absorber; selective; chemical; Materialvetenskap;

    Sammanfattning : This thesis consists of two parts, one dominating part concerning spectrally selective solar absorbers and one dealing with thermal solar systems. The appended papers I to VIII concern the solar absorber part, papers dealing with the systems part have not been included in the thesis. LÄS MER

  3. 2. Frequency changes and equilibria in experimental populations of Drosophila melanogaster with three lethal carrying fourth chromosomes

    Författare :Agneta Södergren; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Drosophila melanogaster; cage populations; fourth chromosome lethals; fitness components; equilibrium conditions; selective values;

    Sammanfattning : Populations where three different lethals are segregating as alleles have been analysed for the conditions of equilibrium and for the trends during elimination of one allele. Early and late selection as well as sexdependent and sexindependent selection has been taken into consideration. LÄS MER

  4. 3. Rum, frirum och moral : En studie av skolgeografins innehållsval

    Författare :Lena Molin; Jan Öhman; Leif Östman; Brita Hermelin; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Geography; Geography; didactics; curriculum space; morality; choice of content; curriculum theory; selective traditions; national curriculum; syllabus; fundamental values; democracy; citizenship education; upper secondary school; Geografi; Social and Economic Geography; Kulturgeografi;

    Sammanfattning : This thesis, Space, Curriculum Space and Morality, focuses on the two roles of the school, i.e. developing identities and transmitting knowledge. The latest curriculum reform commissions the teachers to transform the fundamental values of the curriculum to the separate subjects. LÄS MER

  5. 4. SiGeC Heterojunction Bipolar Transistors

    Författare :Erdal Suvar; KTH; []
    Nyckelord :Silicon-Germanium-Carbon SiGeC ; Heterojunction bipolar transistor HBT ; chemical vapor deposition CVD ; selective epitaxy; non-selective epitaxy; collector design; high-frequency measurement; dopant segregation; thermal stability;

    Sammanfattning : Heterojunction bipolar transistors (HBT) based on SiGeC havebeen investigated. Two high-frequency architectures have beendesigned, fabricated and characterized. Different collectordesigns were applied either by using selective epitaxial growthdoped with phosphorous or by non-selective epitaxial growthdoped with arsenic. LÄS MER

  7. 5. Pressurized Fluid Extraction : A Sustainable Technique with Added Values

    Författare :Monica Waldebäck; Karin Markides; Åke Bergman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; ASE; biomass; green chemistry; household waste; lipid; pesticide; PFE; pressurized fluid extraction; sediment; Analytisk kemi; Analytical chemistry; Analytisk kemi;

    Sammanfattning : The challenge for the future was defined by the Brundtland Commission (1987) and by the Rio Declaration (1992), in which the fundamental principles for achieving a sustainable development were provided. Sustainable chemistry can be defined as the contribution of chemistry to the implementation of the Rio Declaration. LÄS MER