Under the environmental concerns of consumers, this study uses game theory to analyze impact government subsidies on remanufacturing and protection. The original equipment manufacturer (OEM) independent remanufacturer (IR) can select cooperation non-cooperation, which are facilitated by subsidies, in two ways, including technology licensing R & D joint-venture. We design a market where cons...

In holography, the IR behavior of a quantum system at nonzero density is described by near horizon geometry an extremal charged black hole. It commonly believed that for systems on $S^3$, this $AdS_2\times S^3 $. We show not case: generic static, nonspherical perturbations $ blow up horizon, showing it stable fixed point. then construct new which invariant under only $SO(3)$ (and $SO(4)$) symme...

Amphibians are undergoing large population declines in many regions around the world. As environmental pollution from both agricultural and urban sources has been implicated in such declines, there is a need for a biomonitoring approach to study potential impacts on this vulnerable class of organism. This study assessed the use of infrared (IR) spectroscopy as a tool to detect changes in severa...

The impact of natural and anthropogenic sources of a ir pollution has gained increasing attention from scientific communities in recent years. Indeed , tropospheric aerosols not only perturb rad iative energy balance by interacting with solar and terrestrial rad iation, but also by changing cloud properties and lifetime. Furthermore, these anthropogenic and natural air pollutants, once generate...

Usage of oil shale produces abundant oil shale residue, which may not only directly cause serious pollution to the environment, but also result in a waste of resource. In this paper, acid leaching method and alkali soluble method were compared to obtain the optimum processing conditions for the preparation of white carbon black, which was determined as follows: the mass fraction of NaOH was 8 %...