The collision of a plane parallel shock wave with a plane parallel cloud of uniform density is analysed for the case in which magnetic fields and radiative losses are not considered. General analytic solutions are discussed for the case in which the density of the cloud is greater than that of the surrounding environment. This problem generalises one of the classical problems in gas dynamics: t...

The collision of a plane parallel shock wave with a plane parallel cloud of uniform density is analysed for the case in which magnetic fields and radiative losses are not considered. General analytic solutions are discussed for the case in which the density of the cloud is greater than that of the surrounding environment. This problem generalises one of the classical problems in gas dynamics: t...

Cloud computing is a new and increasingly popular form of IT outsourcing. It implies that a cloud service provider offers very standardized abstract IT services which are accessed by a user over the Internet. While cloud services are supposed to be very beneficial for small and medium-sized enterprises, the adoption of such services has been low in this group, among other reasons because of hig...

Cloud Computing is still a hype to provide IT services as customers demand. Especially small and medium size businesses can benefit of this new trend because of the flexibility Cloud Computing provides for the consumption of its services. Nevertheless the step into the cloud must be carefully prepared and setup to ensure a successful usage and an appropriate return on investment. Currently the ...

As the information carried in a high spatial resolution image is not represented by single pixels but by meaningful image objects, which include the association of multiple pixels and their mutual relations, the object based method has become one of the most commonly used strategies for the processing of high resolution imagery. This processing comprises two fundamental and critical steps towar...