درخت حوزه‌های تخصصی

The increasing progress of technology has affected all aspects of human life. One of the new technologies for which various applications have been created today is virtual reality technology. Virtual reality seeks to create a sense of reality in an unreal environment. The aim of this research is the effect of virtual reality technology on the creation of customers' attitudes and understanding of property and service providers in the real estate consultant department in Shiraz. The statistical population includes all real estate clients and those who refer to the real estate sector in Shiraz, and since the population is considered, it is unlimited; The number of statistical sample is 384 people. In this research, the standard questionnair of Players and Ponsin (2020) were used to collect research data. Structural equation modeling approach and PLS3 software were used for data analysis. The results showed that virtual reality technology has a significant effect on creating the attitude and understanding of customers towards the property and the service provider in the real estate consultant sector. The combination of virtual reality technology with augmented reality is one of the measures that can significantly improve the attractiveness and efficiency of using virtual reality in the field of real estate.

In this paper, we use fuzzy numbers and possibility theory to model possibility. The purpose of this work is to determine the optimal investment model based on the neural network method for fuzzy LR, trapezoidal and triangular numbers in an optimal portfolio. It is listed on the Tehran Stock Exchange to maximize "returns" and reduce "risk" to find the optimal portfolio. Therefore, to achieve this goal, the problem of multi-objective nonlinear programming is addressed. Also, by substituting the mean-variance model and the standard mean deviation instead of the Markowitz mean-variance model, the selection of the optimal portfolio in the possible space is examined. Finally, after calculating the model of the possibility of fuzzy numbers, we reach the optimal stock portfolio, which can be used to set the stock portfolio that has the highest returns and the lowest risk.

The current research was conducted with the aim of providing a model of international strategic business renewal in the country's pharmaceutical industry in a combined manner in two qualitative and quantitative phases. In the first phase, the research data was obtained from in-depth and semi-structured interviews with 18 subject matter experts, including entrepreneurs, managers, and senior experts in the pharmaceutical industry in Tehran province, which was based on purposeful sampling dependent on the selection criteria and until reaching the theoretical saturation of this process continued. The validity of the research data was checked and confirmed by going back to the participants and external auditors. Data analysis was done based on the Strauss and Corbin model in the form of open, axial, and selective coding in the Atlas TI8 software. The results of the research showed that entrepreneurial, organizational, managerial, environmental, marketing, international strategy, lean supply chain, social component, organizational performance, and financial performance components are important in designing the international strategic renewal model of pharmaceutical industry businesses. In the second phase of the research, according to the managers and experts of the Ministry of Privacy, there were 681 elites of the Ministry of Privacy, of which 248 research samples were identified using Morgan's sample size table; The tool for collecting information in this section was a researcher-made questionnaire in a five-point Likert spectrum; In order to estimate the validity of the questionnaire, content validity was used using the CVR method and confirmatory factor analysis; Also, the reliability of the tool was estimated to be higher than 0.7 through Cronbach's alpha. The results showed that causal conditions with (0.39), contextual conditions with (0.55), and intervening conditions with (0.34) have an effect on strategies, and strategies have an effect on outcomes with (0.85).