The paper develops a new methodolog y of FE modelling and simulation of the bridge – track – moving train system with the use of CAE systems. The KNI 140070 viaduct of span length 14.40 m, located on the Polish Central Main Line, has been selected. The modernized track contains: 60E1 main rails equipped with Vossloh 300-1 fasteners, 60E1 side rails with SB3 fas teners, B 320 U60 sleepers, crush...

Background Change theories provide an opportunity for organizational managers to plan, monitor and evaluate changes using a framework which enable them, among others, to show a fast response to environmental fluctuations and to predict the changing patterns of individuals and technology. The current study aimed to explore whether the change in the public accounting system of the Iranian health ...

Abstract Concerning dynamic assessments of railway bridges with ballasted track, the input parameters applied in calculation model significantly influence generated results. In this context, there is still a considerable need for research, especially regarding properties ballast superstructure. This contribution dedicated to an experimental investigation longitudinal track‐bridge interaction (T...

A new cavity-chain layout has been proposed for the main linac of the TESLA linear collider [1]. This superstructurelayout is based upon four 7-cell superconducting standingwave cavities, coupled by short beam pipes. The main advantages of the superstructure are an increase in the active accelerating length in TESLA and a saving in rf components, especially power couplers, as compared to the pr...

The type and magnitude of loads passing through the track superstructure have a great impact on both the design and the performance of concrete sleepers and fastening systems. To date, the majority of North American research focusing on quantifying rail infrastructure loading conditions has been conducted on heavy-haul freight railroads. However, the results and recommendations from these studi...

This article describes the latest methods of handling aggregate from railway beds. The updated waste management are based on new Act No. 541/2020 Coll. and its implementation in operation. Attention is paid to hierarchy ballast superstructure, normative documents regulations maintenance reconstruction lines. also deals with possibilities using old materials for purposes. Keywords: Ballast; Poss...

An overall treatment with dental implant consist of several essential parts, including a superstructure containing fixture (part of the implant embedding in the bone), abutment (a machined tapered prepared superstructure attached to the fixture), a retainer (which hold the aesthetic portion of the restoration) and the crown (aesthetic part of the restoration). In this common kind of restoration...