In the transition zone of railway tracks, track irregularities occur frequently due to differential settlement, which arises from difference between vertical supporting stiffness abutment and backfill. This is disadvantageous because it increases maintenance requirements deteriorates ride quality. To address this challenge, study proposes a strategy involving application cement-treated gravel r...

The motions of all known Earth approaching asteroids and comets with reasonably secure orbits have been numerically integrated forward in time to A.D. 2200. Special care was taken to use the best available initial conditions including orbits based upon radar data. Each object was integrated forward with Earth and moon perturbations treated separately, with general relativistic equations of moti...

We explore the minimum distance from a host star where an exoplanet could potentially be habitable in order not to discard close-in rocky exoplanets for follow-up observations. We find that the inner edge of the Habitable Zone for hot desert worlds can be as close as 0.38 AU around a solar-like star, if the greenhouse effect is reduced (∼ 1% relative humidity) and the surface albedo is increase...