List of Articles G2

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  1 - A Hybrid Cuckoo Search for Direct Blockmodeling
  Saeed NasehiMoghaddam mehdi ghazanfari babak teimourpour
  10.7508/jist.2017.18.001
  As a way of simplifying, size reducing and making sense of the structure of each social network, blockmodeling consists of two major, essential components: partitioning of actors to equivalence classes, called positions, and clarifying relations between and within posit More

  As a way of simplifying, size reducing and making sense of the structure of each social network, blockmodeling consists of two major, essential components: partitioning of actors to equivalence classes, called positions, and clarifying relations between and within positions. Partitioning of actors to positions is done variously and the ties between and within positions can be represented by density matrices, image matrices and reduced graphs. While actor partitioning in classic blockmodeling is performed by several equivalence definitions, such as structural and regular equivalence, generalized blockmodeling, using a local optimization procedure, searches the best partition vector that best satisfies a predetermined image matrix. The need for known predefined social structure and using a local search procedure to find the best partition vector fitting into that predefined image matrix, makes generalized blockmodeling be restricted. In this paper, we formulate blockmodel problem and employ a genetic algorithm to search for the best partition vector fitting into original relational data in terms of the known indices. In addition, during multiple samples and various situations such as dichotomous, signed, ordinal or interval valued relations, and multiple relations the quality of results shows better fitness to original relational data than solutions reported by researchers in classic, generalized, and stochastic blockmodeling field. Manuscript profile
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  2 - International Institutions; Mathematica Modeling of Change from G5 to G20
  Ali Akbar Kiani
  International Institutions, though one of key global actors and topics of International Studies, are rarely studied by focusing on the internal processes of change. A justification for lack of research could be the challenges in quantifying internal changes and processe More

  International Institutions, though one of key global actors and topics of International Studies, are rarely studied by focusing on the internal processes of change. A justification for lack of research could be the challenges in quantifying internal changes and processes. Hence, the proliferation of qualitative takes relying on personal analysis. Given the importance of cooperation groups in global governance, this article asks what is the degree of change in the process of expansion of G5 into G20? Utilising quantitative and mathematical methods, the study offers an equation based on data provided by the World Back. The equation proves a model to analyse track-records, which seemingly suggests highest performance by G7 and lowest for G8 Manuscript profile
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  3 - Economic Diplomacy and Islamic Republic of Iran’s Accession to the World Trade Organization (WTO)
  Sayed Mohammad Mousavi dehmourdi Vahid Bozorgi
  International Institutions, though one of key global actors and topics of International Studies, are rarely studied by focusing on the internal processes of change. A justification for lack of research could be the challenges in quantifying internal changes and processe More

  International Institutions, though one of key global actors and topics of International Studies, are rarely studied by focusing on the internal processes of change. A justification for lack of research could be the challenges in quantifying internal changes and processes. Hence, the proliferation of qualitative takes relying on personal analysis. Given the importance of cooperation groups in global governance, this article asks what is the degree of change in the process of expansion of G5 into G20? Utilising quantitative and mathematical methods, the study offers an equation based on data provided by the World Back. The equation proves a model to analyse track-records, which seemingly suggests highest performance by G7 and lowest for G8 Manuscript profile
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  4 - Identifying and prioritizing the challenges of export insurance and guarantee system
  باقر  ادبی فیروزجائی
  Bagher Adabi Firouzjaee Abstract One of the governments' policy for export development is to cover political and commercial risks through the issuance of export insurance and guarantees products by export credit Agencies (ECA). In Iran, this plan is done by The More

  Bagher Adabi Firouzjaee Abstract One of the governments' policy for export development is to cover political and commercial risks through the issuance of export insurance and guarantees products by export credit Agencies (ECA). In Iran, this plan is done by The Export Guarantee Fund of Iran (EGFI). The evidence indicates that the value of export insurance and guarantees product and also the number of exporters benefiting from them are low. Therefore, the main purpose of this study is to identify and prioritize the challenges of export insurance and guarantee products in the country based on the SBC approach. In addition, this study has been carried out by analytical-descriptive-survey method. In this approach after surveying of theoretical and experimental studies and obtaining the opinions of experts, the main challenges of exporters in using of export insurance and guarantee services are collected in the form of a questionnaire (including 34 component). After confirming its validity and reliability, the questionnaire was distributed among the selected exporters (current and former customers of the EGFI) and analyzed by SPSS software. The results of the questionnaire analysis indicate that, the exporters are faced with three types of challenges including content factors (such as the lack of exchange rate coverage, high risk of export destination countries, Obligatory credits of government and low capital adequacy of the fund), behavioral factors (restriction in foreign guarantees issuance, weak financial brokerage relations of the fund with foreign financial institution, lack of preferential insurance premiums, shortage of diversity of insurance instruments and weakness of electronic infrastructure) and structural factors (collateral problems, lack of policy coordination between the guarantee fund and Export Development Bank, lack of a comprehensive online risk map and Absence of export insurance and guarantee program for SME industries). Finally, some policy implication are presented in based on the three categories of factors mentioned. Manuscript profile