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Träfflista för sökning "WFRF:(Hoffmann Per) ;mspu:(conferencepaper)"

Sökning: WFRF:(Hoffmann Per) > Konferensbidrag

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1.
  • True, H., et al. (författare)
  • The design and performance of the European freight wagon standard suspensions
  • 2005
  • Ingår i: Am Soc Mech Eng Rail Transp Div Publ RTD. - 0791842290 - 9780791842294 ; , s. 9-18
  • Konferensbidrag (refereegranskat)abstract
    • In the paper we present the three most common European standard freight wagon suspensions. It is characteristic for the European suspensions that they are all primary suspensions without a bolster. The design and the function of their single elements are described. New results on the nature of dry friction and its influence on the damping characteristics are presented. Finally a few theoretical investigations of the dynamics of European freight wagons are surveyed with emphasis on the calculations of the critical speed. The results are compared with corresponding results for American wagons.
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2.
  • Uphaus, Per Ole, et al. (författare)
  • Barriers seen by potential local providers of applications using location-based services
  • 2019
  • Ingår i: Adjunct Proceedings of the 15th International Conference on Location Based Services (LBS 2019), 11–13 November 2019, Vienna, Austria. ; , s. 251-258
  • Konferensbidrag (refereegranskat)abstract
    • This contribution focuses on obstacles in the adoption of location-based services (LBS) as a tool for potential providers of localised applications and content. The following key question needs to be answered: What are the key factors preventing LBS from being accepted in their full potential by potential providers and being used as an element of context marketing? In order to investigate restrictive factors of application of LBS in the German city of Brunswick (Braunschweig) and the surrounding county, this empirical study follows an inductive approach. Five guided focus group discussions were conducted with representatives of relevant sectors for potential LBS usage. These were identified as the tourism industry, the cultural industry, journalism, the trade and service sector and the sports industry.
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