فهرست مطالب محمدرضا کاشفی نیشابوری

The purpose of this paper is to optimize the portfolio consisting of stocks using DEEPQ's reinforcement learning strategy based on the state-action matrix. For this purpose, in order to optimize and make profitable the portfolio consisting of stocks, the performance of the reinforcement learning strategy based on the DEEP Q algorithm and the passive strategy of Buying and Holding in two states of Bullish and Bearish markets during the time period of 2017-2021 were investigated. The statistical population was 672 companies admitted to the Tehran Stock Exchange, of which 7 companies (statistical sample) were considered suitable. The comparison of two strategies shows that the Reinforcement Learning strategy, in the Bullish and Bearish markets, compared to the trading method of buying and holding, which has led to losses, has a high potential for profitability in the Iranian stock market. Based on the results, it is suggested that brokers and stock exchange companies and analysts use the Reinforcement Learning strategy for profitability and stock portfolio optimization. Also, the comparison of the results of these two approaches makes it clear that the application of Reinforcement Learning is more suitable for investors who do not have the high risk-taking ability of the Buy-and-Hold approach.

For long-term savings purposes, cryptocurrency is considered a controversial asset because the value of the cryptocurrency changes significantly several times during the week. Despite the fact that the value of the cryptocurrency has changed since the beginning of the year, the cryptocurrency may lose a lot of its value. Cryptocurrency is an innovation that has created many questions even for experts in various industries. In some countries, cryptocurrency has not only become a means of payment, but also an investment tool that is included in the investment portfolio of cryptocurrency fans. In this article, focusing on cryptocurrency as a source of value, cryptocurrency is examined from the perspective of the role of money. Cryptocurrency can be useful as a form of money and has the characteristics of money such as divisibility, durability, dynamism and other features. The function of cryptocurrency is not based on physical assets such as gold and silver, but on mathematical principles. The actual price of a cryptocurrency is determined by the demand from people who want the coins and

Today, maintaining effective employees is one of the most important factors in achieving the goals of any organization. As much as the judiciary can attract more qualified personnel and if he maintains and uses it more effectively, he will be more successful in achieving his goals. The purpose of the research was to evaluate the strategic factors affecting employee retention policies in government organizations. The research method is practical in terms of purpose and descriptive of correlation type according to the method of data collection. The statistical population of the research includes employees of the judiciary in Tehran in 2023. Using Cochran's formula, 384 people were selected as a sample and 425 questionnaires were distributed and 415 questionnaires were collected. The reliability of the questionnaire was measured by calculating Cronbach's alpha coefficient, which was 0.810. Data were analyzed using structural equation modeling and Smart-PLS software. The findings indicate that organizational commitment, job satisfaction, internal learning ability, and job commitment have a significant effect on the administrative innovation of the judicial branch organization. Finally, administrative innovation has an effect on the retention of employees of the judicial branch.

The purpose of this study is to investigate the role of Fintechs in customer retention mediated by customer satisfaction and is descriptive in nature and method and correlation in terms of relationships between variables. The statistical population included two sections of customers and employees of bank Melli Iran branches in Tehran and the sample size was estimated 384 for customers and 248 for bank Melli employees using stratified and available sampling method. The collected data were analyzed using structural equation modeling in SPSS and smartpls3 software. The results showed that the direct effects between variables, ie the effect of financial Fintechs on customer satisfaction, financial Fintechs on customer retention and the effect of customer satisfaction on customer retention, are statistically significant and sub-hypotheses are confirmed. the strongest effect is related to customer satisfaction coefficient on customer retention and 0.772 and the weakest effect is related to financial Fintech coefficient on customer retention at 0.152. The results of Sobel test showed that the indirect effect of customer satisfaction on customer retention was significant and the main hypothesis of this study was confirmed. The indirect effect of job satisfaction variable in the relationship between financial Fintech and customer retention is about 0.21.

Organizations with the organizational resilience approach in human resource management as the unit that has the most impact on the effectiveness of organizational growth can be the organization's ability to predict, avoid and adjust positively against disturbances and environmental changes, the consequences of this crisis in The field of human resources should be reduced by introducing the role of electronic management. At first, the indicators related to organizational resilience in crisis conditions have been extracted by in-depth study in the theoretical literature and the backgrounds of previous studies that investigated organizational resilience in crisis conditions. Then, using the fuzzy Delphi method, we screened the set of identified indicators, and finally 18 indicators were identified as the main indicators in the organizational resilience approach to provide the electronic human resource management model, after that, using the AMOS method (model structural equations) the desired model has been fitted to know how organizational resilience indicators can be understood for the configuration of the electronic human resources management model. Then, using the fuzzy AHP method, the indicators were ranked. The statistical population of the research consists of university professors and relevant experts, managers and senior experts in the field of e-business who have expertise in the subject of research, since the group of experts is used in this research. The results of the structural equation model showed the good fit of the model, and the results of the fuzzy AHP showed that the most important indicators are: knowledge management, information sharing, responsiveness and adaptability, organizational commitment, predictive power, flexibility, creativity, and agility. Organization.

Study clarifies the effect of greening Porter's competitive advantage in the marketing process by emphasizing the marketing information system.

Study used applied developmental and qualitative method. Population included experts and marketing and environmental experts of oil companies, from which 13 samples were selected by targeted snowball method for semi-structured interviews. A content analysis method based on data foundation theory was used to analyze the data. Appropriate codes were assigned to different parts of the data and concepts were determined. Selective coding allowed to refine categories and the main dimensions of the research emerged in the form of causal, pivotal, contextual, intervening, strategies, and accordingly to determine emergence of Porter's competitive advantage in the marketing process.

Findings showed that entrepreneurial behaviors and managerial factors provide the basis for sustainable green marketing and then green social responsibility for oil companies. Meanwhile, organizational agility paves the way for sustainable green marketing and social responsibility. Green marketing also affects the positioning of green and ultimately green competitive advantage for the company and customers by influencing the capabilities of the company, production factors and environmental factors.

Results showed that the green marketing process is a complex process that affects the agility of the organization, entrepreneurial behavior and managerial factors leads to green positioning and ultimately, a green competitive advantage for the company and customers

Given thechanges that have taken place in the world today,in developing countriesthat face many threats,these countries need appropriate solutions tosolve their economicproblems tomake better useof theirGod-givenfacilities and wealth.Oneof the important strategies is investment development.Due to limited resources,inaddition tothe issue ofinvestment development,increasing investment efficiency and awareness of the riskofstock falls are among the most important issues.The purposeof thisstudywas to investigate the effectofmanagerial abilityon the investment efficiencyof companieslisted on theTehran StockExchange andto investigate the effectof investment efficiency onthe risk of fallingstock pricesof companieslisted ontheTehranStockExchange usingthe methodThe data panel isfor the period 2011-2018.The results showedthat managerialability has a positive effecton investment efficiency so that if themanagerial abilityof a unit increases,investment efficiency/0005.The unit increases;The risk of falling stockpriceof the first benchmark of theprevious year and investmentefficiency have a negative effect on therisk ofstock falling, so that if the risk of falling stock priceofthe first benchmarkof the previousyear and the investment efficiencyof a unit increases,the riskof fallingstock is0.08 And decreasesby1.54 points;The riskof fallingstock priceof the second benchmark of theprevious year and investment efficiency have a significant negative effect onthe risk of stockfalling, sothat if the riskof fallingstock price of thesecond benchmarkof the previous year and the investmentefficiency of one unit increases,the risk ofstock falling is/07Anddecreasesby1.81points