Sökning: "rail freight"

Visar resultat 16 - 20 av 43 avhandlingar innehållade orden rail freight.

  1. 16. Reducing greenhouse gas emissions – Examples from the freight transport sector: Essays on economic growth, public policy instruments, and renewable energy

    Författare :Johanna Takman; Johan Woxenius; Statens väg- och transportforskningsinstitut; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Climate change mitigation; Renewable energy; Public policy instruments; Evaluation; Modal shift; Greenhouse gas emissions; Environmental Kuznets curve; Liquefied biogas; Economic development; Freight transport;

    Sammanfattning : The overall aim of this thesis is to improve the understanding of if, and how, we can combat climate change and other non-wanted environmental changes alongside economic development. Paper I address this question by investigating the relationship between CO2 emissions and GDP per capita. LÄS MER

  3. 17. Effects of top-of-rail friction modifiers on the friction, wear and cracks of railway rails

    Författare :Saad Ahmed Khan; Jan Lundberg; Rolf Dollevoet; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance;

    Sammanfattning : The railway is an economical and environmentally friendly mode of transport for long distances and heavy loads. The demands on the operators are increasing with increased competition in the market, and therefore they are currently demanding more track capacity. In the short term, the existing network is expected to deliver the increased capacity. LÄS MER

  4. 18. Towards a Model of Lean Freight Transport Operations

    Författare :Per-Olof Brehmer; Kenth Lumsden; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Freight carrier operations are increasingly squeezed between intensified competition, a changed market structure, increased customer preferences, financial pressure from the owners and the influences from technological innovations. Despite an extensive work to coordinate individual resources, the results are not satisfactory. LÄS MER

  5. 19. Intermodal Road-Rail Transportation for Express Transport Services

    Författare :Sofia Ohnell; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transport services; Intermodal transportation; transport systems; modelling; express transportation;

    Sammanfattning : Express transport services are produced in highly modularised transport systems, a fact that implies that one subsystem can be exchanged for another without causing a need for major changes in other parts of the system. Express goods are not common on a large scale in freight railway transport systems, as those are often not considered reliable enough for time-critical goods. LÄS MER

  7. 20. Tread Braking of Railway Wheels - Noise-related Tread Roughness and Dimensioning Wheel Temperatures

    Författare :Tore V Vernersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rail chill; block material; temperature; heat partitioning; railway; corrugation; thermoelastic analysis; tread braking; noise;

    Sammanfattning : Block braking is a commonly used braking system for freight wagons and other types of railway vehicles. One or several brake blocks are pressed against the tread (running surface) of the wheel, which is also in rolling contact with the rail. LÄS MER