the purpose of this descriptive – correlation research was to investigate factors influencing job burnout among jihad-e keshavarzi organization specialists in kurdistan province. the statistical population of the study consisted of all jihad-e keshavarzi organization specialists (n=449). using the krejcie and morgan’s (1970) table and proportional stratified random sampling technique, 220 speci...

the work presented in this paper investigates the causes of size effects in structural-concrete members. it isbased on the use of a finite-element model found to yield realistic predictions of structural-concrete behavior in allcases investigated to date. in fact, the previous use of this model in investigations of size effects in reinforced-concretebeams indicated that such effects reflect the...

the aim of this research work was to investigate on the ball filling estimation of miduk semi-autogenous (sag) mill via an utilized method. miduk copper concentrator is located in kerman province, iran, and its size reduction stage includes one gyratory crusher which feeds one sag mill (9.75 dia.(m)*3.88 length(m)) following two parallel ball mills (5dia.(m)*7lenght(m)). after sag mill, a tromm...