مقالات رزومه دکتر فاطمه شهدکار

The purpose of this study is to evaluate the effect of applying the circular economy business model to knowledge-based companies. In terms of purpose, this research is in the category of basic-developmental research and based on the method of data collection, it is descriptive-survey. The statistical population of this study includes all managers of knowledge-based companies in five provinces of the country in 1400, in which 354 people were selected as the research sample by stratified random sampling. In this study, a standard questionnaire was used whose validity and reliability were confirmed. Kolmogorov-Smirnov tests were used to analyze the collected data in order to normalize the data as well as confirmatory factor analysis and structural equation method (AMOS24). Findings showed that among the studied components are: process with path coefficient (0/76), implementation requirements of circular economy (0/88), user interface (0/97), ecosystem with path coefficient (0/99), financial structure (0/99) and value (0/99) have the greatest impact on the business model of the circular economy. The results showed that using a business model can open the way for those involved and planners of the Vice President for Science, Ministry of Science, managers of science and technology parks to improve the country's economic level and also create innovative and environmentally friendly opportunities to increase prosperity and economic prosperity.

During the past decades, circular economy has become a fundamental and important issue in many developed countries in order to gain sustainable competitive advantage and create multiple values of economic development, social justice and environmental protection. But despite the importance of this issue, there is a lack of scientific research in this field as well as the design and development of circular business models as a transition economy tool in our country. Based on this, the purpose of this research is to design a circular economy business model for knowledge-based companies. This research is exploratory and fundamental-applied in terms of its purpose, and in terms of data collection, it is mixed research that analyzes information in the first (qualitative) stage of systematic foundation data theory and in the second (quantitative) stage of structural equation method.‌ In this research, 8724 initial open codes were identified, which were divided into ‌118 open codes,‌ 17 axial codes (stakeholders, value network, material and immaterial resources, key activities, revenue structure, cost structure, environmental conditions and external factors, input requirements and internal factors, user sector,‎end of consumption period, distribution channels, ‌customer relationship,‌value creation, value acquisition, value delivery,‌value proposition), and ‌6 selected codes (ecosystem, processes, financial structure, feasibility, user interface, value) that was divided in the framework of the paradigmatic model and the axial phenomenon (multiple values). In addition, the results of this study enable entrepreneurs to design a more appropriate executive framework for their business based on multiple values and common stakeholders using the circular economy business model

This article aims to investigate the relationship between cyberspace capabilities and the characteristics of international entrepreneurship and improve the export performance of knowledge-based companies. This research was conducted by descriptive correlation method. The statistical population of this study includes 293 knowledge-based companies in Khorasan Razavi province. A total of 166 managers of these companies were selected as a research sample by simple random sampling method. The data collection tool was three questionnaires of cyberspace capabilities, international entrepreneurial characteristics and export performance that were used as researchers. Content validity, face validity, structural validity and validity of the questionnaires were confirmed. The results showed that there is a relationship between e-commerce capabilities and the Internet with the characteristics of international entrepreneurship. There is also a significant relationship between e-commerce and Internet capabilities and international entrepreneurial characteristics with improved export performance. The results also showed that the capabilities of the Internet and e-commerce and the characteristics of international entrepreneurship affect the export performance of knowledge-based companies.

Linear economy and circular economy are two opposing concepts in today's world. The basic principles of linear economy rely on the uncontrolled flow of waste consumption and increasing production.In contrast, the circular economy is based on efficient design to eliminate waste with respect to the social, economic, environmental and conscious behaviors of resource consumption.The purpose of this review article is to investigate the differences between the two types of economics, the factors affecting the implementation of circular economy and to present the SWOT circular and linear economics.In this review study conducted in 1399, articles indexed in Irandoc, ScienceDirect and Scopus databases were used.23243 articles (from 14 different countries) were reviewed, which included qualitative and quantitative research from 2019.The results of these searches were refined in stages by studying the title, abstract and complete article. The results showed that the circular economy model, based on its unique infrastructure principles, offers benefits in solving economic, environmental and social challenges, creating sustainable development and more business survival.