درخت حوزه‌های تخصصی

Purpose: Entrepreneurial leadership plays an effective role in improving the performance of various businesses including small and medium businesses. As a result, the current research was conducted with the aim of presenting a model of the role of entrepreneurial leadership in the performance of active small and medium businesses in the field of nanotechnology in Tehran. Methodology: The method of this research was of mixed exploratory type (qualitative and quantitative). The population of the present study in the qualitative section was the policy experts of the nanotechnology industry, which number of 17 of them were selected as a sample according to the principle of theoretical saturation and with the purposeful sampling method. Also, the population of present study in the quantitative section was the managers and experts of small and medium businesses of nanotechnology industry whit number 1434 people, which 303 people of them were selected as a sample according to Cochran's formula and with the available sampling method. The data of the qualitative and quantitative sections were collected with methods of semi-structured interview and researcher-made questionnaires, respectively which whose psychometric indicators were confirmed and analyzed with methods of thematic analysis in MAXQDA software and exploratory factor analysis and structural equation modeling in SPSS and LISREL software, respectively. Findings: The findings of the first part of current research showed that the model of the role of entrepreneurial leadership in the performance of active small and medium businesses in the field of nanotechnology had 13 sub-factors in the 5 main factors of guidance, support, coaching, facilitation and entrepreneurship. Also, the findings of the second part of the present study showed that the factor load, average variance extracted and reliability of all factors were appropriate. In addition, the model of the role of entrepreneurial leadership in the performance of small and medium-sized businesses active in the field of nanotechnology had a significant effect on all five main factors and each factor with its sub-factors (P<0.05). Also, the findings of the second part of the current research showed that the factor load, average variance extracted and reliability of all factors were appropriate. In addition, the model of the role of entrepreneurial leadership in the performance of active small and medium businesses in the field of nanotechnology had a significant effect on all five main factors and each main factor on its sub-factors (P<0.05). Conclusion: The model of the role of entrepreneurial leadership in the performance of active small and medium businesses in the field of nanotechnology has many practical implications for the activists in the field of nanotechnology industry, and they can according to the identified factors provide the basis for improving entrepreneurial leadership.

Purpose: Individuals going through adolescence faced a significant number of changes from biological, and cognitive to social and emotional. Due to the changes experienced by adolescents, it is susceptible for adolescents to experience a high level of loneliness. The correlation between loneliness and impulsivity and the association between impulsivity and self-harm as well as self-injurious behaviors puts adolescents in a vulnerable position in performing undesirable acts or behaviors. On the other hand, resilience plays a significant role in an individual’s ability to cope with an adverse situation or bounce back quickly after the undesired situation in order to maintain or regain mental health. Therefore, the objective of this study is to run review research through contemporary studies to summarize accumulative documents in the area of resilience, loneliness, and impulsivity among adolescents to investigate the mediating role of resilience. Methodology: For this, a search was carried out on the Web of Science, Google Scholar, and PubMed. Thus, a set of keywords was used, followed by filtering main keywords, resulting in a review of 99 articles published a decade ago. Findings: The results demonstrated that the number of adolescents having mental illness increased significantly over the years, and adolescents aged 16 and above are at risk of mental disorders. Besides that, this research revealed that adolescents in Malaysia are at risk of peer and social rejection, which is highly associated with loneliness and also has a correlation with aggression and impulsivity. Conclusion: It was seen that loneliness and impulsivity are essential risk factors for adolescents’ mental health and resilience can consider effective cognitive and coping skills for adolescents. It was also perceived that most of the papers focus on the investigation of the correlation between loneliness, impulsivity, and resilience, being necessary to develop more experimental studies on the effectiveness of resilience therapy for adolescents’ enrichment. These results serve as a source of reference for future research.

Purpose: The interaction of remote employees can play an effective role in improving the situation of the organization, which possible factors affecting it include the use of information and communication technology and internal communication satisfaction. Therefore, the current research was conducted with the aim of determining the relationship between the use of information and communication technology, internal communication satisfaction and interaction of remote employees with structural equation modeling. Methodology: In a descriptive research from type of correlation, from among the education employees of one district of Tehran city number of 220 people were selected as a sample with using the stratified random sampling method. In this study, in order to collect research data was used the Lee standard questionnaire (2023), which in the present study its validity and reliability were checked and confirmed. The data of this study were analyzed by structural equation modeling method in SPSS and Smart PLS software. Findings: The findings of the present study showed that there was a positive and significant correlation between the use of information and communication technology, internal communication satisfaction and employee interaction (P<0.01). Also, the model of use information and communication technology on employee interaction with the mediator of internal communication satisfaction had a good fit. In this model, the use of information and communication technology had a direct and significant effect on internal communication satisfaction and employee interaction and internal communication satisfaction had a direct and significant effect on employee interaction. In addition, the use of information and communication technology with the mediator of internal communication satisfaction had an indirect and significant effect on employee interaction (P<0.001). Conclusion: Considering the direct and indirect impact of the use of information and communication technology on employee interaction, in order to promote the status of the organization and employee interaction can be provided the conditions for improve the use of information and communication technology and internal communication satisfaction.

Purpose: One of the main goals of the education system is to improve the academic performance of students. Therefore, the aim of this study was to comparison the effect of Gagne’s educational model and Keller’s educational-motivational model on academic motivation and achievement of seventh grade students. Methodology: This was a quasi-experimental study with pretest and posttest design with control group. The research population was seventh grade students of Zahedan city in 2019-20 academic years, which from them 60 people who were selected by purposive sampling method and randomly replaced in three equal groups including two experimental groups and one control group. The first experimental group was trained by Gagne’s educational model method and the second experimental group was trained by Keller’s educational-motivational model method for eight sessions of 45 minutes and the control group was trained by conventional method. Data were collected by academic motivation questionnaire (Harter, 1981) and research-made academic achievement test and analyzed by multivariate analysis of covariance and Bonferroni post hoc test in SPSS software. Findings: The findings of the present research showed that both methods of Gagne’s educational model and Keller’s educational-motivational model in compared to the control group significantly increased academic motivation and academic achievement of students (P<0.05), but there was no significant difference between the two educational methods in increasing their academic motivation and academic achievement (P>0.05). Conclusion: According to the results of this study, to increase and promote academic motivation and academic achievement of students can be used both methods of Gagne’s educational model and Keller’s educational-motivational model.