The range of Ubiquitous Computing environments envisioned are characterized as either constantly controlled by a permanent owner, i.e. a privatized environment, or support a general scope of controlling parties as in a public setting. This paper proposes a component architecture and operational protocol for an environment that and transiently changes from the first to the second, based on the v...

rangelands are known as one of the main income resources for their exploiters.in the recent century, management of iran rangeland has undergone vast transformationsbecause of vulnerable socio-economic conditions of pastoralists. a study was done toprovide a clear picture of the status and utilization of aq qala rangelands via assessinginternal and external environmental factors affecting the ut...

The purpose of this paper is to study the relationship between columnar aerosol optical thickness and ground-level aerosol mass. A set of Sun photometer, elastic backscattering lidar and TEOM measurements were acquired during April 2007 in Lille, France. The PM2.5 in the mixed boundary layer is estimated using the lidar signal, aerosol optical thickness, or columnar integrated Sun photometer si...