Sökning: "railway"

Visar resultat 6 - 10 av 455 avhandlingar innehållade ordet railway.

1. 6. On the Directivity of Railway Noise Sources

   Författare :Xuetao Zhang; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; railway traction noise; railway rolling noise; line source; railway aerodynamic noise; moving source; equivalent source line; De-Dopplerization; sound emission time; sound immission time; directivity; the Doppler factor;

   Sammanfattning : This dissertation deals with the directivity of railway noise. The directivity of railway noise is of particular importance when we have high-rise buildings close to the track, tunnel openings, partial barriers, or when we calculate the maximum sound pressure level during a pass-by based on the sound power level of the different sub-sources of a train. LÄS MER

3. 7. Män i staten : stationskarlar och brevbärare i statens tjänst, 1897-1937

   Författare :Lars Kvarnström; Tord Strömberg; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Identity; state employer; railway; post office; bureaucratization; patriarchalism; corporativism; trade union strategy; professional strategy; political strategy; gender; brotherhood; History; Historia; historia; History;

   Sammanfattning : The employer, the state, long had the right to unilaterally set wages and determine working conditions. The goverment employees lacked the right to negotiate and sign agreements and to strike. This dissertation focuses on government employees, analyzing their identity and the strategies they chose to deal with their relationship to their employer. LÄS MER

4. 8. Railway Infrastructure Robustness : Attributes, evaluation, assurance and improvement

   Författare :Per Norrbin; Ragnar Hedström; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance Engineering;

   Sammanfattning : According to the European program Horizon 2020, multifaceted challenges in transportinfrastructure include 1) making infrastructure more resilient to keep pace with the increasing mobility needs; 2) reducing the impact of infrastructure on the environment;and 3) dealing with declining resources to maintain and upgrade transport infrastructure. New design and maintenance approaches must be developed to handle these issues, ascurrent methods are inadequate. LÄS MER

5. 9. Railway capacity analysis : Methods for simulation and evaluation of timetables, delays and infrastructure

   Författare :Anders Lindfeldt; Bo-Lennart Nelldal; Ullrich Martin; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Järnvägsgruppen - Kapacitet; Järnvägsgruppen - Kapacitet;

   Sammanfattning : In this thesis the symptoms and underlying behaviour of congestion on railways are analysed and discussed. As well as in many other countries, Sweden faces increasing demand for transportation. To meet this new demand, railways play an important role. LÄS MER

7. 10. Exploring the Railway System from a Risk Governance Perspective

   Författare :Alexander Cedergren; Lunds universitets centrum för riskanalys och riskhantering (LUCRAM); []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; risk governance; railway; framing; accident investigation; implementation; vulnerability; resilience; critical infrastructure;

   Sammanfattning : In recent decades, the Swedish railway system has faced substantial deregulations. As a result, management of risk is often carried out in settings involving multiple stakeholders having various roles, mandates, and viewpoints on risk, and where no single stakeholder has the superior authority. LÄS MER