this study examined the effect of general and specific practice on the presence of a special skill. 24 healthy university students with no history of basketball were selected. after a pretest, they performed constant and variable practice (in constant and variable groups) for 5 weeks and 3 sessions per week. a performance test was conducted at the end of every week and retention and transfer te...

When there is a high correlation between the study and the  auxiliary variables, the rank of the auxiliary variable also correlates with the study variable. Then, the use of the rank as an additional auxiliary variable may be helpful to increase the efficiency of the estimator of the mean or total of the population.   In the present study, we propose two  generalized familie...

the aim of this study is designing a model for the optimal development of human resources in academic libraries. to this end, the university of tehran library as a case study is investigated. with regard to the four independent variables- organizational structure, organizational culture, leadership and strategic perspective, and mediator variables of attitude, behavior and creativity of staff- ...

nowadays, automakers have invested in new technologies in order to improve the efficiency of their products. giant automakers have taken an important step toward achieving this objective by designing continuously variable transmission systems (cvt) to continuously adapt the power of the engine with the external load according to the optimum efficiency curve of engine and reducing fuel consumpti...

the purpose of this study is to provide answers to two questions: attitude of the population of mashhad aged 18 to 65 towards divorce in 2004 and the factors affecting this attitude. the hypotheses of this study have been formed using the views of durkheim and the theoretical frameworks of functionalism. the study is based on the idea that higher education, conflict at home, attitude towards di...