this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...

Introduction: Covid- 19 pandemic has caused challenges in Health higher education system. In order to manage these challenges, policies have been recommended, which most of those can be applied in the post- Covid- 19 era. The purpose of this study is to investigate challenges, approaches and achievements in Health higher education system, due to Covid- 19 pandemic. Method: The method of this st...

the quest for power has formed much of the world history especially in 20th and 21st centuries. oil (energy) particularly after industrial revolution has been a tool for conquest and power and has been transformed to a geopolitical issue. from a geopolitical point of view this has been the case for the last two centuries in central asia and caucasus. central asia and caucasus has always been...

The present study was conducted to investigate the factors affecting organizational commitment and the role of organizational justice in promoting it. Purposeful study is an applied research. The statistical population consisted of specialists working in petrochemical companies located in Pars Special Economic Region (Assaluyeh). The sample size was 260 according to the Cochran formula. The res...

with the introduction of communicative language teaching, a large number of studies have concerned with students’ oral participation in language classrooms. although the importance of classroom participation is evident, some language learners are unwilling to engage in oral activities. this passivity and unwillingness to participate in language classroom discussions is known as “reticence”. rev...

abstract biometric access control is an automatic system that intelligently provides the access of special actions to predefined individuals. it may use one or more unique features of humans, like fingerprint, iris, gesture, 2d and 3d face images. 2d face image is one of the important features with useful and reliable information for recognition of individuals and systems based on this ...

Background and purpose: According to the importance of managerial skills in both public and private pharmacies, this study aimed to investigate the managerial skills of technical officers of pharmacies in south of Iran. Materials and Methods: This was a cross-sectional study on 124 technical officers and 113 personnel working in the pharmacies in Shiraz in 2017. A researcher-made questionnaire...

In Iran, a great percentage of goods and services are produced by holding companies however, these companies are not still known completely. There are several factors that can motivate economic managers to establish holding companies. Regarding the basic differences among vertical, horizontal and conglomerate holding companies, this article aims to diagnose and prioritize these factors separate...