The concept of so-called global symmetry of percolation models is discussed and extended to multicolored models. An integral equation is obtained, which determines the partial percolation probabilities P(a) for sites of color a. This equation is applied to a polydisperse particulate composite: a mixture of conducting (of relative fraction x(m)) and nonconducting spheres with distributions of si...

In this study, an experimental research was conducted in developing and characterising sugarcane bagasse pineapple leaf particulate re?nforced polyester res?n compos?tes. Unsaturated resin (UPR) reinforced with particulates varied proportions (0 – 25 wt. %) by mould casting. Morphology mechanical properties of the composites were examined. There a good dispersion resin. The composite demonstrat...

Environmental impact assessment of liquid rocket motor exhaust obtained due to mainly liquid propellant combustion have been highlighted. Exhaust product analysis has been carried out theoretically by computer software NASA CEC -71 to identify toxic emissions of rocket combustion. In the present study a high volume Air Samplers (APM-430) was deployed at predetermined locations near launch pad f...

We estimate the contamination risks from the atmospheric dispersion of radionuclides released by severe nuclear power plant accidents using the ECHAM/Modular Earth Submodel System (MESSy) atmospheric chemistry (EMAC) atmospheric chemistry-general circulation model at high resolution (50 km). We present an overview of global risks and also a case study of nuclear power plants that are currently ...

Three-wavelength integrating nephelometer measurements combined with short(SW) and long-wave (LW) irradiance measurements were used to investigate the irradiance effects on the daily evolution of the particulate matter (PM) at the ground level, and contribute to the characterization of the land–atmosphere interaction in pollution dispersal. The integrating nephelometer measurements have allowed...

BACKGROUND Associations between exposure to particulate matter and susceptibility to cardiovascular events have been reported. Although the underlying mechanisms are not fully understood, this association seems to be particularly exaggerated in the presence of atherothrombotic risk factors. The present study was undertaken in low-density lipoprotein receptor knockout (LDLR/KO) mice to test the ...

the most important environmental pollutant in steel industry is air pollution due to the process of its products. optimise sitting for this industry, in a great extend will prevent pollutants and emissions. khorasan steel company is located near some populous villages and three rivers. it is necessary to perform an investigation for providing abatement and control of air pollution, in time of p...