Abstract For sets of n points, even, in general position the plane, we consider straight-line drawings perfect matchings on them. It is well known that such admit at least $$C_{n/2}$$ C n / 2 different plane match...

The paper discusses properties of the near-tail dawnside magnetopause and boundary layer, as obtained from Cluster plasma and magnetic field measurements during a single skimming orbit on 4 and 5 July 2001 that included 24 well-defined magnetopause crossings by all four spacecraft. As a result of variations of the interplanetary magnetic field, the magnetic shear across the local magnetopause v...

Roads can fragment and isolate wildlife populations, which will eventually decrease genetic diversity within populations. Wildlife crossing structures may counteract these impacts, but most crossings are relatively new, and there is little evidence that they facilitate gene flow. We conducted a three-year research project in Banff National Park, Alberta, to evaluate the effectiveness of wildlif...

Crashes at rail level crossings represent a significant problem, both in Australia and worldwide. Advances in driving assessment methods, such as the provision of on-road instrumented test vehicles, now provide researchers with the opportunity to further understand driver behaviour at rail level crossings in ways not previously possible. This paper gives an overview of a recent onroad pilot stu...

Forestry best management practices (BMPs) are used to reduce sedimentation from forest stream crossings. Three BMP treatments (BMP ́, BMP-std, and BMP+) were applied to three forest road stream crossings (bridge, culvert, and ford). BMP ́ did not meet existing BMP guidelines, BMP-std met standard recommendations, and BMP+ treatments exceeded recommendations. Following BMP applications, three simu...

The regular drawing of the complete bipartite graph Kn,n produces a striking pattern comprising simple and multiple crossings. We compute the number c(n) of crossings and give an asymptotic estimate for this sequence.

The task of vibrational mode reordering is very important for reaction valley studies and for the determination of small curvature tunneling effects. An extended algorithm for adiabatic mode reordering is presented. It is based on the method introduced by Konkoli et al. [J Comput Chem 1997, 18, 1282], which is shown to suffer from numerical problems in the region of frequency-crossings and avoi...

This study was designed to investigate how drivers assess safety issues at passive railway-road level crossings. The study was limited to traditional and relatively inexpensive safety measures. Fifty-six car and van drivers were interviewed after passive level crossings with low traffic volume. Both key requirements of safe behaviour (i.e. decrease of speed and looking for trains) were indicate...