Over the last three decades, transportation has become one of main energy-consuming sectors around world and, as a result, large amounts emissions are produced, contributing to global warming, climate change, and health problems. Therefore, huge investments efforts have been made by governments international institutions find new renewable clean sources energy. As contribution these efforts, th...

In this paper, an efficient numerical solution for the scattering problem of inhomogeneous dielectric rough surfaces is presented. The inhomogeneous dielectric random surface represents a bare soil surface and is considered to be comprised of a large number of randomly positioned dielectric humps of different sizes, shapes, and dielectric constants above an impedance surface. Clods with nonunif...

The consecutive speed-control humps (SCHs) possess the function of controlling speed forcibly, but cause violent vibration of a vehicle inevitably. This paper tries to further explore the inherent link among parameters of the SCHs, velocity and vehicle vibration. A 4-DOF nonlinear half-vehicle model with nonlinear springs and nonlinear dampers is established. The consecutive SCHs-speed coupling...

Two cases of injury to passengers seated on public transport buses occurred after the vehicles had traversed road humps. While the potential dangers to seated bus passengers have been acknowledged in the Department of Transport literature, specific mention in medical reports is lacking. Should the United Kingdom follow the example set by the United States, where the placement of road humps on b...

We report on time-resolved CCD photometry during the 2005 June outburst of a dwarf nova, ASAS160048-4846.2. The observed light curves unambiguously showed embryonic humps with a period of 0.063381(41) days, after which genuine superhumps emerged with a period of 0.064927(3) days. Based on evidence for double-peaked humps in the earlier stage of the outburst, this object might be qualified as th...

We study a parabolic free boundary problem with fixed gradient condition which serves as a simplified model for the propagation of premixed equidiffusional flames. We give a rigorous justification of an example due to J.L. Vázquez that the initial data in the form of two circular humps leads to nonuniqueness of limit solutions if the supports of the humps touch at the time of their maximal expa...