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- Berggren, Eric, et al.
(författare)
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Continuous Track Stiffness Measurement : An Effective Method To Investigate The Structural Conditions Of The Track
- 2002
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Ingår i: Railway Engineering Conference.
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Konferensbidrag (refereegranskat)abstract
- Vertical track stiffness and its variations along the track are important parameters that affect the conditionof the track, in particular the deterioration of track geometry and ballast degradation. The track stiffness isalso an important factor that has to be considered when upgrading the track for traffic of higher axle loads and higher speeds. Within the EU project EUROBALT II, Banverket (Swedish National Rail Administration) has developed a method to continuously measure the vertical track stiffness. Recently,Banverket has made further improvement of the method and carried out extensive measurements in Sweden using our track-loading test vehicle. Different combinations of excitation frequency and speedhave been tested. The measurement results have shown a significant correlation with actual geotechnical conditions and depth of soil layers. The measurement method has also shown very good repeatability. In this paper, we introduce the method of continuous track stiffness measurement and report the promising results we have obtained. It can be concluded that the continuous track stiffness measurement provides an effective way to investigate the structural condition of the track and should be a very useful tool for determining the cause of certain track problems.
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- Walldius, Åke, et al.
(författare)
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User-Driven Quality Certification of Workplace Software, the UsersAward Experience
- 2004
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Ingår i: Work with Computing Systems. ; , s. 150-155
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Konferensbidrag (refereegranskat)abstract
- This paper summarizes activities and results from the quality assessment project ITQ, "Quality certification of IT support at work", which was performed by Swedish researchers in close co-operation with trade unions in 1999-2002. The ITQ project is part of a network, UsersAward, which continues to work for the goal to develop and maintain a strategy for good software products on the work floor through strong user influence. A main result from ITQ is the first (2002) version of a user satisfaction based certification method, User Certified 2002, which is described in some detail. Other, parallel activities, large surveys of IT use in work places, user conferences, pilot projects, and a yearly IT Prize contest, are described more briefly. Finally implications and plans for the future, especially international spread of the activities, and further development of the certification process, are described and discussed.
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