درخت حوزه‌های تخصصی

Purpose: The present study was conducted aimed to presenting model of empowerment elementary period managers based on components of futurology. Methodology: This study was applied in terms of purpose and combined (qualitative and quantitative) in terms of implementation method. The research population in the qualitative section was the specialists and experts of Tehran city and in the quantitative section were the primary school managers of Tehran city in the academic years of 2019-20. The research sample in the qualitative section was 12 people who were selected according to the principle of theoretical saturation by purposive and snowball sampling methods and in the quantitative section was 270 people who were selected according to the Krejcie and Morgan table by multi-stage cluster sampling method. Data were collected by methods of take noting, semi-structured interviews and researcher-made questionnaire whose face and structure validity of questionnaire were confirmed and its reliability was obtained by Cronbach's alpha method 0.88. Qualitative data were analyzed by open, axial and selective coding methods and quantitative data were analyzed by structural equation modeling in SPSS-25 and LISREL-8.8 software. Findings: The findings of the qualitative section showed that the model of empowerment elementary period managers based on components of futurology had 6 main categories, 20 sub-categories and 85 indicators. The main categories and sub-categories were included transformation management (sufficient cognition of environment, responsibility and organizational health), empowerment (strengthening teachers' careers, applying participatory management and improving relationship between managers and teachers), sense of competence (having the enough motivation, support for managers, flexibility and creative thinking), organizational structure (organizational changes, lack of resources and inadequate distribution and lack of foresight), standardization (applying knowledge management, use of feedback system and modeling) and growth and improvement (foresight, self-efficacy, risk-taking and delegation of authority).The findings of the quantitative section showed that all six main categories had a significant effect on the model of empowerment elementary period managers based on components of futurology and the model had appropriate fitness indicators. Conclusion: Based on the results, the model of empowerment elementary period managers based on components of futurology can have practical implications for education specialists and planners and can be used to improve the structure of education.

The purpose of this paper is investigating the effect of JCPOA on the network behavior analysis of Tehran Stock Exchange indexes using the minimum spanning tree (MST) and hierarchical clustering. By simplifying a complex system, network analysis allows for the extraction of important and essential information from that system. In this paper, using network analysis the simultaneous behavior of 38 industry indexes in Tehran Stock Exchange in manufacturing, service and invest-ment sectors during 2012-2017 was investigated. These analysis included identi-fying the main indexes in the direction of moving other indexes using the MST, providing a classification using hierarchical clustering for the behavioral similarity of the indexes as well as examining the degree of integration (behavioral similarity) of market indexes over time. The results showed that investment, automobile, industry and medicine indexes in the research period had a major role in guiding other indexes and indexes can be classified into six groups in terms of behavioral similarity. The market has also been moving toward integration of indexes since early 2015 and beginning the executive steps of Joint Comprehensive Plan of Action (JCPOA). This reflects the investors' hope for the promotion of all indexes.

Evaluating the performance of companies using their financial ratios is a challenging task that is expected to become more straightforward by reducing the dimensionality of the data. The purpose of this study is to evaluate the performance of companies using a hybrid model for investment-related decision making through which the mean value of various financial ratios are calculated based on the investor's risk-taking behavior so that the number of all criteria is reduced to one single value for each alternative. To do so, a sample of 172 companies listed in Tehran Stock Ex-change was selected from 2008 to -2018. Firstly, the financial ratios were prioritized using decision trees regression analysis (type CART) and TOPSIS Technique. The results showed that Gross Profit Margin and Debt to Equity Ratio are the most and the least important factors, respectively. Then, using OWA (Ordered Weighted Averaging Aggregation) operator, the role of investor’s risk-taking behavior was investigated, and the results showed that investor’s risk-taking behavior changes the outcome of the decision-making process significantly.