Understanding the situation, behavior and the nature of sand dunes and also their location, transport and deposition are very important. On the other hand, the importance of sand dunes is due to the impacts that they have on water and soil resources, flora and fauna and human infrastructure. This study, looks at the development patterns of sand dunes in Mesr erg region. In the first part, data ...

First, you don’t know what exactly is in the legacy system. The older the legacy system is, the less likely it is that its original developers are still members of the development team or that they are at least available to support the data migration project. Additionally, even if the legacy system has been well documented in the beginning, you often cannot rely on the correctness and completen...

A “role set” is the set of classes in a class hierarchy where an object may reside simultaneously. A “migration pattern” is a sequence of role sets that an object can migrate through. We define a “migration inventory”, which is a set of migration patterns, as a dynamic integrity constraint on object migration. We consider three update languages: SL which has five operators, CSL+ which extends S...

Many organizations migrate their on-premise software systems to the cloud. However, current coarse-grained cloud migration solutions have made a transparent migration of on-premise applications to the cloud a difficult, sometimes trial-and-error based endeavor. This paper suggests a catalogue of fine-grained service-based cloud architecture migration patterns that target multi-cloud settings an...

Directional migration moves cells rapidly between points, whereas random migration allows cells to explore their local environments. We describe a Rac1 mechanism for determining whether cell patterns of migration are intrinsically random or directionally persistent. Rac activity promoted the formation of peripheral lamellae that mediated random migration. Decreasing Rac activity suppressed peri...

Atmospheric conditions fundamentally influence the timing, intensity, energetics, and geography of avian migration. While radar is typically used to infer the influence of weather on the magnitude and spatiotemporal patterns of nocturnal bird migration, monitoring the flight calls produced by many bird species during nocturnal migration represents an alternative methodology and provides informa...