Sökning: "Transport Science"

Visar resultat 1 - 5 av 823 avhandlingar innehållade orden Transport Science.

  1. 1. Competition in Public Transport Essays on competitive tendering and open-access competition in Sweden

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Andreas Vigren; KTH.; Statens väg- och transportforskningsinstitut.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Transportvetenskap; Transport Science; Competition; Public Transport; Tendering; Procurement; Cost efficient; Bus; Railway; Open access competition; 02 Road: Economics; 02 Road: Economics; 111 Road: Public transport; 111 Road: Public transport; J13 Railway: Economics; J13 Railway: Economics; Public transport; Contract; Tender; Economic efficiency; Location; Transport operator; Depot transp ; Impact study; Line transp ;

    Sammanfattning : The results of this work show that the cost efficiency of tendered bus services is similar across all Swedish counties, except for the more high-density counties where efficiency is lower. Considerably lower efficiency is also found for contracts with services run in-house by the Public Transport Authority (PTA), compared to when the same service is run by a private actor. LÄS MER

  2. 2. Costs in Swedish Public Transport An analysis of cost drivers and cost efficiency in public transport contracts

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Andreas Vigren; KTH.; Statens väg- och transportforskningsinstitut.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Transportvetenskap; Transport Science; 02 Road: Economics; 02 Road: Economics; Cost; Increase; Efficiency; Contract; Procurement; Public transport;

    Sammanfattning : De senaste sju åren har de totala kostnaderna för att bedriva kollektivtrafik i Sverige ökat med över 30 procent i reala termer enligt siffror från myndigheten Trafikanalys. Jämförs en längre tidsperiod hittas samma mönster. LÄS MER

  3. 3. MEILI Multiple Day Travel Behaviour Data Collection, Automation and Analysis

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Adrian Corneliu Prelipcean; KTH.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; multiple day travel diary collection; trajectory segmentation; travel mode destination and purpose inference; travel diary collection system comparison; travel pattern stability and variability over time; Transportvetenskap; Transport Science; Datalogi; Computer Science; Geodesy and Geoinformatics; Geodesi och geoinformatik;

    Sammanfattning : Researchers' pursuit for the better understanding of the dynamics of travel and travel behaviour led to a constant advance in data collection methods. One such data collection method, the travel diary, is a common proxy for travel behaviour and its use has a long history in the transportation research community. LÄS MER

  4. 4. Improving Performance in Heterogeneous Networks: A Transport Layer Centered Approach

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Johan Garcia; Karlstads universitet.; Karlstads universitet.; Karlstads universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TECHNOLOGY Information technology Computer science; TEKNIKVETENSKAP Informationsteknik Datavetenskap; Datavetenskap; Computer Science; transport protocols; partial reliability; image transfer; transcoding; loss differentiation; fairness; wireless networks; network emulation;

    Sammanfattning : The evolution of computer communications and the Internet has led to the emergence of a large number of communication technologies with widely different capabilities and characteristics. While this multitude of technologies provides a wide array of possibilities it also creates a complex and heterogeneous environment for higher-layer communication protocols. LÄS MER

  5. 5. Automation in forestry development of unmanned forwarders

    Detta är en avhandling från Umeå : Institutionen för datavetenskap, Umeå Universitet

    Författare :Ola Ringdahl; Umeå universitet.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TECHNOLOGY Information technology Computer science; TEKNIKVETENSKAP Informationsteknik Datavetenskap; FORESTRY; AGRICULTURAL SCIENCES and LANDSCAPE PLANNING Area technology Forest engineering; SKOGS- och JORDBRUKSVETENSKAP samt LANDSKAPSPLANERING Areell teknik Skogsteknik; data- och systemvetenskap; Computer and Information Science;

    Sammanfattning : For the last 50 year, forestry operations have become more and more mechanized. In modern forestry in Europe two machines are typically used; a harvester that fells, debranches and cross-cuts the trees into logs and a forwarder that transports them to the nearest road. LÄS MER