Mobile technology has taken the telecommunication sector by storm. The technology itself has evolved and grown at an exponential pace. However, the health risks associated with it have also shown an upward trend. This paper starts with a basic introduction to the EMF radiation, how they are emitted through the cell towers and mobile phones. It then talks about the causes & sources of these health hazards, certain metrics like the safety distance & the statutory norms prevalent in different countries as contrast to India. The paper also reviews some of the already published results from different experiments and studies conducted in this domain across the world. Lastly, the paper draws some inference and conclude with basic precautions to reduce the adverse effects and recommendations to help reduce the levels of radiation in the environment.
In this paper, we are trying to find the optimum solution of a transportation problem and is to minimize the cost. The most attractive feature of this method is that it requires very simple arithmetical and logical calculation, which compared to the existing method an optimal solution and illustrated with numerical example.
A model for onset of ferroconvection via internal heat generation in a ferrofluid saturated porous layer is explored. The Brinkman–Lapwood extended Darcy equation with fluid viscosity different from effective viscosity is used to describe the flow in the porous medium. The lower boundary of the porous layer is assumed to be rigid- paramagnetic and insulated to temperature perturbations, while at upper stress-free boundary a general convective-radiative exchange condition on perturbed temperature is imposed. The resulting eigenvalue problem is solved numerically using the Galerkin method. It is found that increasing in the dimensionless heat source strength Ns , magnetic number M1 , Darcy number Da and the non-linearity of magnetization parameterM3 is to hasten, while increase in the ratio of viscosities, Biot number Bi and magnetic susceptibility is to delay the onset of ferroconvection. Further, increase in Bi , Da1 and Ns and decrease in , M1 ,and M3 is to diminish the dimension of convection cells.
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