today, unemployment has become a major problem in national level as well as in yazd province. the presence of high unemployment has caused considerable amount of wastage of active human resources of the society which otherwise could have been used in various prosperous activities. as a result this situation may lead to poverty, corruption, unequal income distribution and other negative conseque...

introduction: one the most anxious moments for mothers and families is labor pain and various methods for its relief have an effect on labor management, patient satisfaction and labor outcome. both pharmacological and non-pharmacological methods are used to relieve labor pain, but in recently years, researchers have focused their attention to non-pharmacological methods for reduction of labor p...

In a civilization, human labor of one type is exchanged for human labor of another type. For example, when one eats at a restaurant, one exchanges money earned from one’s own labor for the labor of people who cook, raise animals and vegetables, deliver goods, etc.. This exchange is made possible by a salary, which establishes a value for labor of different types. There are many ways to represen...

this study is performed in order to study the effect of technical- vocational training on trainee productivity in industrial sector of khorasan and preferring suitable solutions in this field. so labor productivity model was estimated for khorasan industry in period 1985 to 2004. in this model, effects of different variables were investigated on productivity of labor, variables such as: relatio...

efficiency is defined as a concept that determines the input output ratios in an economic system. data envelopment analysis method is a useful tool to estimate the efficiency of a unit. the purpose of this study was to estimate technical efficiency and to determine return to scale of holstein cattle farms in guilan province. therefore, the information including the number of labor and dairy cow...

social differentiation is among the important concepts in sociology. the importance of the concept may be understood from its frequent recurrence in the works of the early sociologists including spencer, durkheim, weber and marx, as well as in the works of later sociologists such as parsons, smelser and luhmann. the idea of segregation is mainly discussed as a key concept in the theories of soc...

in this paper, we propose a new approach for ranking all fuzzynumbers based on revising the ranking method proposed by ezzati et al. cite{ezzati}.to this end, we present and investigate some properties of the proposed approach indetails. finally, to illustrate the advantage of the proposed method, it is applied to several groups of fuzzy numbers and the results are compared with other related a...