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: The size of a school is a crucial factor influencing educational outcomes, yet its impact on student participation and the sense of community remains complex and multifaceted. This study aims to explore how different school sizes affect these dimensions, focusing on qualitative aspects of student experiences and institutional dynamics to provide a deeper understanding of the educational landscape. Methodology: A qualitative research design was adopted, utilizing semi-structured interviews to collect data from 29 participants, including students, teachers, and school administrators from various sized schools. Theoretical saturation was reached to ensure a comprehensive exploration of the themes. Data were analyzed using NVivo software to facilitate thematic analysis and ensure systematic handling of the interview transcripts. Findings: Five main themes were identified: Student Engagement, Sense of Community, Learning Environment, Administrative Influence, and Challenges and Barriers. Sub-themes such as Academic Participation, Support Networks, Classroom Dynamics, and Policy Making illustrated the specific ways in which school size impacts educational practices and student perceptions. Smaller schools were generally found to foster a stronger sense of community and engagement, whereas larger schools provided more diverse opportunities but faced challenges in maintaining a personalized learning environment. Conclusion: The study concludes that school size significantly influences the educational environment, affecting everything from student engagement to administrative strategies. While smaller schools excel in creating a cohesive community, they often struggle with resource limitations and opportunity diversity. Larger schools, on the other hand, offer extensive resources and opportunities but may lack the close-knit community feel that enhances student engagement and sense of belonging.