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International Journal of Fundamental Physical Sciences (IJFPS)

 

 

IJFPS, Vol 7, No 3 , Sept , 2017

 

 

 

doi:10.14331/ijfps

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Assessment of the activity concentrations of the naturally ‎occurring radionuclides from the samples collected from ‎the ‎different (cufl & jfl) urea fertilizer company limited

DOI:10.14331/ijfps.2017.330104

 

M.M.Uddin, A.Hossain, M. M. Haque, S.Barua‎

 

ABSTRACT
The activity concentrations of 238U, 232Th and 40K have been determined for product (urea) samples collected from the Chittagong Urea Fertilizer Limited (CUFL) and Jamuna Fertilizer Company Limited. The different kinds of sample were analyzed by using a calibrated high purity germanium (HPGe) detector of relative efficiency of 38%. For solid samples, the mean activity concentrations of 238U, 232Th and 40K have been found 78.672.87, 59.742.27 and 463.719.16 Bq/Kg, respectively. The mean activity concentrations of product samples for the corresponding radionuclide were 73.122.83, 74.592.32 and 391.589.38 Bq/Kg, respectively. The artificial radionuclide 137Cs has not been detected in any of the samples. The obtained results of this study show that for some samples the values are lower and for the remaining are higher than the World average values. The mean representative index value is less than unity which confirms that the area is safe for the factory workers and the public nearby.

 

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Multiple Positive Solutions for Some P-Laplacian Nonlinear Problem At Infinity

DOI:10.14331/ijfps.2017.330105

 

Robabeh Sahandi Torogh

 

ABSTRACT

In recent years, boundary value problem of second-order have received a lot of attention. In this paper, I study the ‎existence of positive solutions for a class of p-Laplacian boundary value problem at infinity. The fixed point ‎theorems in cones is the our main tools to prove the existence of solutions. I provide sufficient conditions under ‎which this system has solution. I establish some propositions to prove the existence of positive solutions for these ‎equations.‎.‎

 

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