درخت حوزه‌های تخصصی

Women have always been of cultural relevance as one of the most important elements of the society. The central role of women in cultural development has caused significant increase in the attention to these areas in recent years. The main aim of this research has been to interpret the women's status in cultural development and improvement. For this purpose, first based on theoretical principles and the literature available in this regard, the initial conceptual model was prepared. Then, based on the opinions of the statistical population of the research, as experts specialized in culture, interpretation of the indices of this model has been done. The sampling method in this research has been cluster, with the sample size determined as 384 using Morgan table. In this research, for measuring the research indices, questionnaire has been used. The reliability of this questionnaire was confirmed through Cronbach alpha coefficient, and its validity via construct validity method. The results of this research led to identification of the major indicators and components affecting the women's status in cultural development and improvement.

The family is the most important element of society and therefore the health of the family depends on the relationship between husband and wife and one of the most important issues between couples is the issue of sexual satisfaction. This study aimed to evaluate the effectiveness of mindfulness training in improving sexual satisfaction in married women. The present study was a quasi-experimental method with a control and experimental group. The study population was all married women aged 25 to 40 years in Sirjan. The sample size was 30 women in experimental (n = 15) and control (n = 15) groups. The sampling method was available by sampling method. The method of data collection was sexual satisfaction questionnaire and the experimental group was trained in mindfulness training in 8 sessions of 60 minutes. Data were analyzed by analysis of covariance. The results of the research hypothesis showed that mindfulness increases sexual satisfaction among married women.

This study aims at getting a better performance for optimal stock portfolios by modeling stocks prices dynamics through a continuous paths Levy process. To this end, the share prices are simulated using a multi-dimensional geometric Brownian motion model. Then, we use the results to form the optimal portfolio by maximizing the Sharpe ratio and comparing the findings with the outputs of the conventional model. To examine the robustness of the results, we have evaluated its performance for different investment horizons and various volumes of price information over a long period (approximately twenty years) in the Tehran Stock Exchange (TSE). Findings indicate that within the trading dates spanning the interval 24-Mar-2001 to 19-Sep-2020, the return of the portfolios obtained from applying this simulation scheme for maximization of Sharpe ratio is (244% on average) higher and their risk (standard deviation) are lower (1227% on average) than those realized by the conventional methods. Additionally, a comparison of the simulation approach with a performance of the actual market portfolios indicates that the Sharpe ratios of the simulation method are higher (0.055% on average) than those resulting from the total market performances. The results of the stochastic dominance test show that our proposed strategy has a first-order stochastic dominance (FSD) over the conventional one and market portfolios, that means at each level of cumulative distribution, the Sharpe ratio of our method is higher, and as FSD test makes no assumptions about the curvature of investors' utility functions, these results do not depend on the degree of risk aversion of investors, and as long as investors prefer a higher Sharpe ratio, they would be better off if they follow our proposed strategy.