Sökning: "Piteå"

Visar resultat 11 - 15 av 20 avhandlingar innehållade ordet Piteå.

  1. 11. Efficient energy use in different applications

    Författare :Lars Johansson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energiteknik; Energy Engineering;

    Sammanfattning : There is a steadily growing awareness for environmental issues caused by the increased energy use, mainly in the industrial world. The use of fossil fuels has reached the point where it can not be looked at as an endless source, the resources are decreasing at a pace where alternative energy sources will be a necessity for this and future generations. LÄS MER

  3. 12. Företag i perifera regioner : Fallstudier av företagartradition, företagsmiljö och företags framväxt i Norrbottens inland

    Författare :Elisabeth Sundin; Leif Lindmark; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; buying behavior; case studies; dependency theory; developing industry; economic tradition; entrepreneurship; external control; growing firms; historical method; industrial environment; linkage patterns; local control; northern Sweden; peripheral regions; prefabricated houses; small firms; spirit of enterprise; staple theory; underdeveloped regions; Företag; Sverige; Norrbotten;

    Sammanfattning : This is a study of how industries develop in regions that are industrially weak, exemplified by Norrbotten, the northernmost province of Sweden. Developing industries are represented by three companies manufacturing prefabricated wooden houses, situated in the municipalities Övertorneå, Kalix (Morjärv) and Älvsbyn in the interior of Norrbotten. LÄS MER

  4. 13. Epidemiology of asthma in primary school children

    Författare :Anders Bjerg Bäcklund; Eva Rönmark; Bo Lundbäck; Thomas Sandström; Giovanni Viegi; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Asthma; wheeze; child; allergic sensitisation; prevalence; remission; risk factor; trend; Lung diseases; Lungsjukdomar;

    Sammanfattning : Background: Childhood asthma has increased worldwide, although recent studies report a prevalence plateau in some western countries.Aims: To investigate the prevalence of asthma and the associated risk factor patterns from ages 7-8 to 11-12 with special emphasis on the hereditary component, and further to study prevalence trends at age 7-8 from 1996 to 2006 and the possible determinants of these trends. LÄS MER

  5. 14. Slag Formation During Pilot-Scale Pressurised Entrained-Flow Gasification of Woody Biomass

    Författare :Charlie Ma; Christoffer Boman; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

    Sammanfattning : Pressurised entrained‐flow gasification (PEFG) of sustainable woody biomass offers the opportunity for envi-ronmentally benign production of syngas that is suitable for synthesis of fuels and other chemicals. During the PEFG process, ash-forming matter in the fuel undergoes transformations. LÄS MER

  7. 15. Economic efficiency in waste management and recycling

    Författare :Christer Berglund; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi;

    Sammanfattning : This thesis consists of four self-contained papers that all deal with economic efficiency issues with respect to recycling behavior and waste management policies. Paper [1] provides an econometric analysis of the most important determinants of inter-country differences in waste paper recovery and utilization rates. LÄS MER