The development and implementation of wheel-rail contact models in multibody codes are two active research topics, aiming at improving the accuracy numerical results computational efficiency dynamics analysis. However, realism is challenged when considering switches crossings (S&C), where most adverse conditions occur. This paper presents a benchmark study performance MUBODyn, VOCO VI-Rail asse...

We show that the maximal number of singular moves required to pass between any two regularly homotopic plane or spherical curves with at most n crossings grows quadratically with respect to n. Furthermore, for any two regularly homotopic curves with at most n crossings, there exists such a sequence of singular moves, satisfying the quadratic bound, for which all curves along the way have at mos...

In the present paper, we define a Dolbeault complex with weights according to normal crossings, which is a useful tool for studying the ∂-equation on singular complex spaces by resolution of singularities (where normal crossings appear naturally). The major difficulty is to prove that this complex is locally exact. We do that by constructing a local ∂-solution operator which involves only Cauch...

During certain portions of the Cassini mission to Saturn, Cassini made repeated and periodic crossings of the magnetospheric current sheet that lies near the magnetic equator and extends well down the magnetospheric tail. These repeated crossings are part of the puzzling set of planetary period variations in numerous magnetospheric properties that have been discovered at Saturn. During 2010 the...

This study reviews the development of railway safety in Finland from 1959 to 2008. The results show that the level of safety has greatly improved over the past five decades. The total number of railway fatalities did not show any obvious decreasing or increasing trend during the first decade, but since the early 1970s the annual number of fatalities has decreased from about 100 to 20. The estim...