درخت حوزه‌های تخصصی

The main purposes of this study are identification, modeling and ranking of factors influencing the brand hate.  To do this, mixed approaches of qualitative and quantitative have used. In the qualitative approach, the grounded theory method has considered. Hence, the opinions of 18 sale managers in the field of home appliance, as experts, collected and analyzed. The results of analyzing in 3 steps of grounded theory with MAXQDA software revealed that 14 variables affect the brand hate which are placed in 3 groups of casual condition, external factors and main variables. The results of this section was approved by 10 indicators of Strauss and Corbin. In the next section, for understanding the importance and rank of each variables in brand hate, TOPSIS method has used. The results of this section showed that among main variables, experimental avoidance; among casual condition, marketing and advertisement and among external factors, competition had highest importance.

The present study aimed at investigating the physical security dimensions affecting the security of volleyball stadiums in Iran. The study employed a descriptive-exploratory research method conducted on 115 managers and officials in volleyball stadiums, presidents and experts of Provincial Volleyball Boards as well as experts in the field of sports facilities and events as well as sports violence and aggression. They answered a 20-itme Physical Security Assessment Questionnaire extracted from the adjusted Stadium Security Questionnaire (Faraji, 2014). The collected data were analyzed using exploratory and confirmatory factor analysis. The research findings indicated that physical security is one of the main factors affecting the security of volleyball stadiums in Iran. Control of toxic and chemical substances (0.91), internal control (0.90), peripheral environment control (0.70) and court entrance control (0.59) were considered as the most important factors of physical security on the security of volleyball stadiums (P <0.05). It seems that the strict implementation of the security inspection protocol for spectators, the adoption of appropriate security measures in the external environment of volleyball stadiums, the reform of the ticket sales system, and the use of new methods for distributing and selling tickets to control the court entrances can prevent spectators’ violent behaviors and increase their satisfaction. As a result, the security of volleyball stadiums can be fulfilled.

The current study aims to identify and rank the potential field of investment in the advanced technologies in Golestan Province. This is an applied and developmental research and the method for data gathering is descriptive and survey. The target society (decision-making team) includes all the industry elites of Golestan Province including ‘Ministry of Industry, Mine and Trade’, ‘The Industrial Towns Company’, ‘Standard Organization’, ‘Department of Environment’, and the deputy governors of Golestan Province. They were 15 people in total. A questionnaire was used to collect the data of the research. In order to analyze the data of descriptive statistics frequency distribution tables, frequency percentage, mean and charts were used. Also, in order to answer the research questions Analytical Hierarchy Process (AHP) and the different types of software like Excel, SPSS, and Expert Choice were used. The findings imply that “Biology-related elements” and “Nano-related industries” stand in the first and second ranks of investment in advanced technologies of Golestan Province respectively.

In this paper, first a short history of the notion of equilibrium problem in Economics and Nash$acute{'}$ game theory is stated. Also the relationship between equilibrium problem among important mathematical problems like optimization problem, nonlinear programming, variational inequality problem, fixed point problem and complementarity problem is given. The concept of generalized pseudomonotonicity for vector valued bifunctions is introduced. By using it some existence results for the vector equilibrium problem, in the setting of<br /> topological vector spaces, are presented. Some examples in order to illustrate the main results and compare them with the corresponding published results are furnished. Further, the compactness of the solution set of vector equilibrium problem is investigated.

Time changes of return, inefficiency studies performed and presence of effective factors on share return rate are caused development modern and intelligent methods in estimation and evaluation of share return in stock companies. Aim of this research is prediction of return using financial variables with artificial neural network approach. Therefore, the statistical population of this study includes 120 listed companies in Tehran stock securities during 2005 to 2017. Independent variables in this research are market variables (Earning quality, free cash flow) and dependent variable is share return. The obtained outputs from estimation of the artificial neural networks and results obtained from estimation, using of this method with evaluation scales concerning random amount and comparing it with adjusted R, we found that there is meaningful relation between the associated variables and return. However, such network has the least error than other networks.