Sökning: "Klas Pettersson"

Hittade 4 avhandlingar innehållade orden Klas Pettersson.

  1. 1. Homogenization of some elliptic equations with connections to elasticity

    Författare :Klas Pettersson; Patrizia Donato; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik; Mathematics; Matematik;

    Sammanfattning : In this PhD thesis we prove some properties of elliptic equations in connection with periodic homogenization. We mainly study the stationary linearized elasticity system. This thesis consists of five papers complemented with a short introduction.The first paper concerns some elliptic equations on a domain with oscillating boundary. LÄS MER

  3. 2. RhPt and Ni based catalysts for fuel reforming in energy conversion

    Författare :Angélica Viviana González Arcos; Lars J. Pettersson; Klas Engvall; Anker Jensen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; RhPt bimetallic catalysts; Ni catalysts; ceria-zirconia; potassium tungsten bronze; zirconium dioxide; autothermal reforming; biodiesel; diesel; sulfur; deactivation; tar reforming; steam reforming; biomass gasification; auxiliary power units; naphthalene; Chemical Engineering; Kemiteknik;

    Sammanfattning : Although current trends in global warming are of great concern, energy demand is still increasing, resulting in increasing pollutant emissions. To address this issue, we need reliable renewable energy sources, lowered pollutant emissions, and efficient and profitable processes for energy conversion. LÄS MER

  4. 3. On Environmental Grounds : Outdoor Recreation, Place Relations and Environmental Sustainability

    Författare :Daniel Wolf-Watz; Klas Sandell; Peter Fredman; Robert Pettersson; Ebba Lisberg Jensen; Mittuniversitetet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Environmental Concern; Place; Nature; Practice; Tourism; Kulturgeografi; Human Geography;

    Sammanfattning : This thesis examines the relationship between outdoor recreation and environmental concern as part of the wider issue of environmental sustainability in late-modern societies. It includes studies of environmentalists’ (that is environmentally committed individuals’) preferences and motivations with regard to outdoor recreation, and covers the inquiries of whether and how outdoor recreation can influence levels of environmental concern. LÄS MER

  5. 4. Den mångtydiga församlingen : Organisering, roller och relationer i spänningen mellan sekularisering och desekularisering

    Författare :Anneli Öljarstrand; Roine Johansson; Klas Borell; Per Pettersson; Mittuniversitetet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Parishes; organizational change; role theory; network analysis; internal secularization; desecularization; Sociology; Sociologi;

    Sammanfattning : Parishes of the Church of Sweden work under the influence of a religious and cultural tradition as well as a societal, individual and internal secularization (Chaves 1994). The organization therefore has to react to the requirements of change alongside the need to preserve its distinctive character. LÄS MER