مرتضی طاهری

The introduction of technology into various areas of social life, including sports and sports competitions, has grown significantly in recent years. One of these technologies is the video assistant referee (VAR) in football matches, and the present study aims to investigate the sociological nature of this technology and its impact on the social structure of Iranian football.This research was conducted with a qualitative approach and using thematic analysis method. Data were collected through semi-structured interviews with 20 sports experts (including referees, coaches, university professors, veterans and analysts of the Iranian Premier Football League).The findings showed that VAR makes sense at three levels: from the perspective of technological determinism as a determining force in behavior and decision-making; from the perspective of technological effects as a tool for promoting justice and social control; and from the perspective of social constructionism as a phenomenon whose meanings and functions are redefined in the interactions and lived experiences of actors. On the one hand, this technology has led to a relative enhancement of the sense of justice and increased social trust in referees, but on the other hand, it has brought consequences such as weakening the referee's symbolic authority, reducing collective emotion, transferring the locus of protests from the field to the media, and creating cultural inequality due to differences in infrastructure. Also, institutional distrust and poor media transparency were identified as the main obstacles to the full acceptance of VAR in Iran.VAR technology in Iranian football has a dual effect: on the one hand, it increases the accuracy of refereeing and the sense of justice, and on the other hand, it causes psychological tensions and changes in social and cultural interactions. The findings of this study can be beneficial for sports policymakers, the Football Federation, and the media in optimizing the implementation of VAR and reducing its negative consequences.

Background: Expression of mucosal levels would affect the function of internal organs of the body and the digestive system, such as by creating a blockage for the progression of cancerous tumors and the failure of the target tissue, especially the large intestine. Aim : The purpose of this sudy was to investigate the effect of 8 weeks of quercetin supplementation and intermittent exercise on protein levels of intestinal Muc5Ac, Muc4 and polyphosphate in rats with colon cancer. Material and Methods: Tewenty-four rats were randomly assigned into four groups including quercetin (n=6), exercise (n=6), quercetin + exercise (n=6) and control group (n=6). Colon cancer induction was provided with the use of 1,2-dimethylhydrazine for 8 weeks and daily quercetin supplementation of 50 mg/kg body weight of mice by Gavagene method. Exercise protocol was performed 5 sessions per week with intensity of 60-70%, maximum speed of 23 m/min with 2-min rest in 8 weeks. ANOVA was used to analyze data. The level of significance was set at P <0.05. Results: It was suggested that there was a significant difference in protein levels of intestinal Muc5Ac, Muc4 and polyphosphate in all groups ( P <0.05). Furthermore, it was also indicated that Muc5Ac levels was significantly higher in the quercetin+ exercise group other than pther groups ( P <0.05). Conclusions: It was concluded that intermittent exercise and quercetin supplementation would increase the levels of Muc5Ac and Muc4 proteins in the large intestine of mice with colon cancer.  

The purpose of this article is identification of factors which have significant effects on the perceived value of educational services by students’ parents in Iran educational system. Furthermore, we explore the role these factor play on the evaluation of educational services by parents. The statistical population of this study includes the parents of students of all secondary private schools in Tehran at the year 2021 and 800 parents were selected using random sampling. The research tool is a questionnaire with 62 statements which were identified using interviews by experts. We collected 300 questionnaires after calculating validity and reliability. We used Principal Components Analysis (PCA) in order to extract factors with highest degree of determining power. Using four identified principal components, we run a linear regression for testing the significance of these factors. Our results show that all of four factors i.e. functional, social, emotional and epistemic value have significant impact on the perceived values by parents in Iran educational system.