a novel mathematical model has been developed to aid the formulation of emulsion explosives. this mathematical model calculated heat of explosion, oxygen balance and raw material cost as a function of explosive ingredients, and the solution of the mathematical model was obtained by a ms excel program. the effects of the different content of nh4no3, nano3, h2o, and span-80 and composite fuel oil...

objective: the objective of this study is to evaluate verbal and mathematical skills among young children. method: the population of this study is composed of 5 and 6 years old children from nursary schools of the welfare organization in east of tehran. an 10 test on 218 children, was administrated and 120 individuals were selected as the subjects for the present study. the 10 of these subjects...