mohammad ali afshar

Limited researches have been presented on Blockchain technology as new concepts in ownership dissemination. The focus of previous researches have been on the technical specifications of the implementation and operation of this technology. Therefore, this study has tried to examine the required changes in the business model of organizations. Challenge of implementing Blockchain not only requires technical feasibility but also needs collaboration among businesses to re-engineering processes. In this study, a cooperative business model based on Blockchain is presented and the challenges of implementing this technology in the Iran's mobile operator are discussed as an example of developing country. Canvas is the base model in this research and conducting an in-depth review of the literature has showed that isolated model like canvas could not be mapped for cooperative technologies like Blockchain. Qualitative content analysis methodology is used to codify the experts’ opinions in the two fields of business model design and Blockchain technology industrialization and customization of model in mobile operator industry is verified by Fuzzy Delphi method. In the cooperation-oriented approach of the new business model, mobile operator can design and provide new value-added services by sharing their information resources and decrease the fraud.

Decisions on the process of assessment and selection of suppliers should be made by examining all possible options, otherwise the organization will encounter many problems during the implementation and implementation phases.The purpose of the present study was to determine the indifference points of assessors of the water and wastewater company in Zanjan province.The method of this study was descriptive. The data of this study is related to supplier assessment of one of the projects of the city water and wastewater company Zanjan province.The data was collected based on the views of 10 experts with at least a bachelor's degree and at least 5 years of work experience in the company based on the "supplier assessment form".The data has been analyzed using the 2014 version of MATLAB software.A total of 10 cases of matrix matched with the initial decision matrix are identified and generated separately for each method.TOPSIS-GA = 2 and TOPSIS-PSO = 3 and AHP-GA = 2 and AHP-PSO = 3. A total of 10 cases of matrix matched with the initial decision matrix are identified and generated separately for each method.

The process of evaluating and selecting suppliers should be done by examining all possible options and scenarios for each contractor, otherwise the organization will face a lot of difficulties in the implementation and implementation phase of the commitments. The purpose of this study was to determine the indifference points of the suppliers of gas companies in Zanjan province.This study is descriptive. The data of this study is related to the evaluation of suppliers of Zanjan province gas company projects. The data was collected based on the views of 10 experts with at least a bachelor's degree and at least 5 years of work experience in the company based on the "supplier assessment form". The data has been analyzed using the 2014 version of MATLAB software.A total of 6 items of matrix matched with the initial decision matrix are identified and generated for each method.TOPSIS-GA = 2 and TOPSIS-PSO = 3 and AHP-GA = 2 and AHP-PSO = 3. From the results of the ranking of options, the third-party contractor has ranked first among the other options. Depending on the indeterminate matrices identified, different scenarios are set for the third contractor. Considering the company's budget and expectations that are more in line with the fourth indifference point (OUT PUT-5-AHP-PSO), the third contractor is being asked to strengthen his capabilities so that he will succeed in the contract with his chance for future cooperation. Increase.

The effective role of capital in every country flows through giving guidelines for capital and resources, generalizing companies and sharing development projects with public, and also adding accredited companies stock market requires appropriate decision making for shareholders and investors who are willing to buy shares based on price mechanism. Forecasting stock price has always been a challenging task, since it is affected by many economic and non-economic factors and variables; therefore, selecting the best and the most efficient forecasting model is tough and essential. Up to now applying weighted mean called weighted mean price has been used to forecast industry average price for companies in the stock market and investors were forecasting based on this method. First we have identified 10 accredited banks in TSE and 10 banks in Iran Fara Bourse. In this article, by applying one of the mathematical optimizing techniques, industry means got calculated based on optimized parameters and compared with the industry average; in this statement we strived to find another variable that could forecast with less deviation.  In the following study, by calculating frequency level of deviations, average for price forecasting in banking industry during five years is examined. Finally, the research suggests that, instead of using mean of industry average, it is better to use mean average of golden number, which will lead us to more accurate results.

Management can achieve the long term goals in a system by means of a dynamic framework. This article considers the problem of social development in macro level. Since social development has a dynamic and multidimensional nature, the system dynamics method has been used in this article. In system dynamics approach, sustainability of social system is not increasing or decreasing in a system, moreover, it is not a static goal, making it impossible to achieve it. In this regard, four indicators of social development that is, population means, employment, water, and food are utilized for dynamic evaluation modeling. This model evaluates social development in Iran over the period 1989-2009 and predicts it until 2019. The results indicate there is a relationship between social development components.

The long term goal attaining of economic system management requires the establishment of a dynamic framework to integrate multiple perspectives. This article considers the problem of economic development in macro level. As economic systems are complex adaptive systems composed of numerous numbers of components of dynamic and multidimensional nature, dynamics method is applied in this research. It is to this end that the main economic development indicators are utilized for dynamic measurement modeling. This model assesses economic development in Iran over the period 1989-2009 and makes a prediction for the year 2019. The results indicate relationships between economic development components.