Sökning: "Gunnar Lundqvist"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Gunnar Lundqvist.

  1. 1. Tobaksvanor i medelåldern : riskfaktormönster, rökstoppsattityder och erfarenheter av att sluta röka

    Författare :Gunnar Lundqvist; Lars Weinehall; Kurt Svärdsudd; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Public health science; Folkhälsovetenskap; folkhälsa; Public health;

    Sammanfattning : Tobacco use, mostly smoking, has been a deeply rooted habit for many people for centuries. However, it was not until the second half of last century that the risks with smoking became obvious. Today when the bad consequences of smoking are recognized by almost all people, it is important to discuss why smokers choose to continue smoking. LÄS MER

  3. 2. Error and Traffic Control for High-Speed Networks

    Författare :Henrik Lundqvist; Gunnar Karlsson; Shivkumar Kalyanaraman; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telecommunication; Telekommunikation;

    Sammanfattning : The Internet evolves rapidly, both in terms of the applications that use it and the networks that carry the traffic. This creates many important research tasks, both to adapt the networks that carry the traffic to work well together with the Internet protocols and to make the protocols robust to tolerate various underlying networks. LÄS MER

  4. 3. Managers’ Work, Working Conditions and Wellbeing in Small Companies with Profitable Growth

    Författare :Elena Ahmadi; Gloria Macassa; Daniel Lundqvist; Gunnar Bergström; Magnus Sverke; Högskolan i Gävle; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; small businesses; business growth; managers; wellbeing; psychosocial working conditions; managerial work activities; leadership behaviours; job demands; job resources; occupational health; små företag; företagstillväxt; chefer; välbefinnande; psykosociala arbetsvillkor; chefsarbetsaktiviteter; ledarbeteende; arbetskrav; arbetsresurser; arbetsmiljö; Health-Promoting Work; Hälsofrämjande arbete;

    Sammanfattning : Background Managers’ work, working conditions and wellbeing are important determinants of occupational health in organizations. Nevertheless, little research has investigated these factors in the context of small growing businesses, which are known to contribute to employment, economic growth and social stability. LÄS MER

  5. 4. Novel cycles using carbon dioxide as working fluid : new ways to utilize energy from low-grade heat sources

    Författare :Yang Chen; Per Gunnar Lundqvist; Mats Westermark; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermal energy engineering; Termisk energiteknik;

    Sammanfattning : This licentiate thesis proposes and analyzes three carbon dioxide novel cycles, namely: the carbon dioxide transcritical power cycle, the carbon dioxide Brayton cycle and the carbon dioxide cooling and power combined cycle. Due to the different characteristics of each cycle, the three cycles are suitable for different applications. LÄS MER

  7. 5. Load Shifting and Storage of Cooling Energy through Ice Bank or Ice Slurry Systems : modelling and experimental analysis

    Författare :Marino Grozdek; Per Gunnar Lundqvist; Michael Kauffeld; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; refrigeration systems; cool thermal energy storage system; ice; modelling; simulation; field measurement; experiment; indirect system; ice-on-coil system; external melt; ice slurry; homogeneous storage; heterogeneous storage; Thermal energy engineering; Termisk energiteknik;

    Sammanfattning : Ice based Cool Thermal Energy Storage (CTES) systems have attracted much attention during last few decades. The reasons are mainly of economical and environmental nature. LÄS MER