Sökning: "global transport"

Visar resultat 21 - 25 av 387 avhandlingar innehållade orden global transport.

  1. 21. Purchasing in power asymmetry - A study of vaccine procurement for developing countries

    Författare :Ala Pazirandeh; Teknisk logistik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Purchasing; Power; buyer-supplier relationships; humanitarian logistics; global health;

    Sammanfattning : The purpose of this study was to increase the understanding of, and develop a model to explain, interrelations between purchasing strategies carried out by buyers within vaccine supply chains for developing countries and their buyer-supplier power structure. In the humanitarian aid context, availability of required goods (e.g. LÄS MER

  3. 22. Multiple Imaginaries of the Fossil Fuel Free Future : Biogas and Electricity in Swedish Urban Transport

    Författare :Amelia Mutter; Harald Rohracher; Jane Summerton; Magdalena Kuchler; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sociotechnical imaginaries; biogas; electric vehicles; obduracy; sociotechnical change; urban transport; sociotekniska föreställningar; biogas; elfordon; tröghet; sociotekniska förändring; stadstrafik;

    Sammanfattning : I kölvattnet av klimatkrisen har det blivit allt tydligare att det fossilbaserade transportsystemet måste genomgå en global omvandling. Många alternativ för förnyelsebara drivmedel har föreslagits, alla omgivna av föreställningar om hur dessa tekniker kommer att bidra till en bättre framtid. LÄS MER

  4. 23. The role of methane and hydrogen in a fossil-free Swedish transport sector

    Författare :Mårten Larsson; Per Alvfors; Stefan Grönkvist; Max Åhman; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; renewable transport fuels; biogas; methane; hydrogen; electrofuels; pyrolysis; well to wheel; transport policy; energy policy; Chemical Engineering; Kemiteknik;

    Sammanfattning : Drastic reductions of greenhouse gas emissions are required to limit the severe risks associated with a changing climate. One measure is to disrupt the fossil-fuel dependency in the transport sector, but it appears difficult and costly in comparison to other measures. LÄS MER

  5. 24. Electron transport to nitrogenase in Rhodospirillum rubrum

    Författare :Tomas Edgren; Stefan Nordlund; Patrick Hallenbeck; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rhodospirillum rubrum; nitrogen fixation; electron transport; FixABCX; ferredoxin; Biochemistry; Biokemi;

    Sammanfattning : Biological nitrogen fixation is a key step in the global nitrogen cycle. In this process, dinitrogen in the air is converted to biologically accessible ammonia, which is further assimilated in to the biosphere. LÄS MER

  7. 25. Global Turbulent EquiPartition (TEP) in Tokamak Plasma

    Författare :Igor A. Ivonin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; turbulent plasma; TEP; scaling laws; transport barrier; tokamak; Astronomi; Astronomy and astrophysics; Astronomi och astrofysik; Space and Plasma Physics; rymd- och plasmafysik;

    Sammanfattning : We studied analytically and numerically the establishment of global turbulent equipartition (TEP) of magnetised electrons in a tokamak plasma. This allows us to investigate self-consistently the inhomogeneous distributions of the plasma density, the electron and the ion temperatures, the generation of radial electric field and the poloidal and the toroidal rotation in the turbulent tokamak plasma. LÄS MER