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Visar resultat 11 - 15 av 1022 avhandlingar som matchar ovanstående sökkriterier.

1. 11. Active school transportation : Understanding the parental decision-making process

   Författare :Hanna Forsberg; Stina Rutberg; Anna-Karin Lindqvist; Lars Nyberg; Maria Hagströmer; Luleå tekniska universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Active commuting to school; children; health promotion; parents; theory of planned behavior; physical activity; social norms; Physiotherapy; Fysioterapi;

   Sammanfattning : Few children and adolescents reach the recommended levels of daily physical activity. This trend is evident in the countries examined in this thesis: Sweden and Spain. LÄS MER

3. 12. 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

4. 13. Valuation of goods transportation characteristics : A study of a sparsely populated area

   Författare :Kerstin Westin; Einar Holm; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Just-In-Time; Goods transportation; Sparsely populated areas; Social and Economic Geography; kulturgeografi;

   Sammanfattning : This study describes how consumers and providers of transportation services in a sparsely populated area valuate different transportation characteristics and estimates how these valuations might affect the total goods flows and the flows on individual Origin-Destination links. It also tests Stated-Preference methods as a tool for valuating transportation characteristics. LÄS MER

5. 14. Computer-based decision support for handling uncertainty in railway traffic and transportation

   Författare :Johanna Törnquist; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Railway scheduling; train traffic; transportation; agent systems;

   Sammanfattning : Railway transportation has great potential, but interdependencies in the railway traffic make trains very sensitive to disturbances, which can bedifficult to handle. Using railway in an intermodal transport chain may complicate the interconnections with other modes if there is large uncertainty in the performance of the railway. LÄS MER

7. 15. Complexity in Transportation and Logistics Systems An Integrated Approach to Modelling and Analysis

   Författare :Jonas Waidringer; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; management; measurement; logistics; modelling; complexity; transportation;

   Sammanfattning : The basis for the thesis is to assess the usefulness of describing and analysing transportation and logistics systems as being complex systems. The reason and assumption being that in the future more integrated and sophisticated systems and solutions will be demanded. LÄS MER