An important issue in mobile computing systems is the administration of locationbased access control policies, particularly the mechanism for specification and enforcement of spatial constraints. Simplifying the administration of such policies requires a mechanism that supports both an intuitive and scalable spatial constraint specification and a flexible enforcement architecture. In this paper...

Offering space-based Internet services with mega-constellations of low Earth orbit (LEO) satellites is a promising solution to connecting the unconnected. It can complement coverage terrestrial networks help bridge digital divide. However, there are challenges from operational obstacles technical hurdles facing development LEO satellite access. This article provides an overview state art in acc...

The National Bridge Stock of Iran consists of about 330,000 bridges, of which around 50% are older than 30 years. Since 2010, Iran Road Maintenance & Transportation Organization has started implementing a comprehensive Bridge Management System in order to manage this aged stock efficiently. To predict future conditions of bridge stock, a heuristic numerical method is presented. This methodology...

During cytokinetic abscission, the endosomal sorting complex required for transport (ESCRT) proteins are recruited to the midbody and direct the severing of the intercellular bridge. In this issue, Christ et al. (2016. J. Cell Biol. http://dx.doi.org/10.1083/jcb.201507009) demonstrate that two separate but redundant pathways exist to recruit ESCRT-III proteins to the midbody.

In a recent paper Borel and Serre proved the theorem: If 8 is a Lie algebra of characteristic 0 and 8 has an automorphism of prime period without fixed points f^O, then 8 is nilpotent.1 In this note we give a proof valid also for characteristic p^O. By the same method we can prove several other similar results on automorphisms and derivations. Our method is based on decompositions of the Lie al...

Disaggregation and rack-scale systems have the potential of drastically decreasing TCO and increasing utilization of cloud datacenters, while maintaining performance. While the concept of organising resources in separate pools and interconnecting them together on demand is straightforward, its materialisation can be radically different in terms of performance and scale potential. In this paper,...

!ikansparency is a popular feature in a distributed system where users can access any local or remote resources just as if they were local. As different units in the distributed environment can be integrated into a single unit by means of a distributed operating system, so can multiple LANs be connected by transparent bridges and appear as one LAN to upper layer protocols and end stations. End ...

Com mercial stat ic strain indicators and signal conditioners vary considerably in their circuit details; and, although most of them are based upon some form of the Wheatstone bridge circuit, the bridge circuit is employed in differing ways in different instruments. Because of the many variations in instrument design, a completely general treatment of instrument nonlinearities is not practicabl...

E-loox is an educational software application that has been designed specifically for students located in areas with limited Internet access. Unlike the majority of existing applications, a “hybrid app”– meaning it can function both on and offline. As hybrid app, allows to complete assignments, access course materials, conduct research places where there no While global expanded rapidly last de...

Past earthquakes have demonstrated that old RC bridges may be seismically vulnerable. Bridge responses during the last decades illustrated the necessity of the seismic assessment of bridges especially those which were designed with old codes. In this research an existing concrete bridge representative of the most common bridges in the highway system in Iran are studied. Push over and nonlinear ...