مطالب

Developing economic relations with the countries of the world is necessary for any country, and the nations of the world are always looking to build their business. The expansion of the phenomenon of economic globalization has led states to engage in countries' engagement in pursuing their interests in the form of regional cooperation and the formation of monetary :union:s. Therefore, according to the importance of this issue, the effect of the monetary :union: on bilateral trade is studied using a gravity pattern based on the panel data approach. Also, the factors affecting bilateral trade between selected countries of the world during the period of 1993-2015 are studied. The results of the research show that the effect of a common currency on bilateral trade is positive, which increases trade between countries. Also, the study of variables shows that GDP variables of states and business partners, common currency, race, and standard language have a positive and significant effect on bilateral trade between nations. Real exchange rate variables and trade openness do not affect, and the distance and GDP per capita variables have a negative and significant impact on the flow of trade between the drains. Hence, it is concluded that countries that are adjacent to each other or have common currency would strengthen the trade between themselves, by creating monetary :union:s.

Although social softwares are interactive and communication tools that play an effective role in the field of learning and teaching, unfortunately, the interactive educational method using web2 tools is a new approach in Iran. In the other hand, the learning management system used by many virtual universities to improve the learning and learning process of students has some shortcomings and problems. According to research conducted by researchers, the combination of a learning management system and a social software in universities has reduced many of these constraints. The purpose of this research is to provide a model for utilizing social soft wares in a learning management system. In this regard, the research strategy is to provide a research model and validate it. This research is applied in terms of purpose, and in terms of information gathering, it is a descriptive survey. The data gathering tool was a researcher made questionnaire. Sampling method is targeted judgment. Therefore, by reviewing the literatures, first, the capabilities of various social softwares (wiki, blog, social networking, podcast and tag) were identified in the field of learning and education and a model for using these softwares in each module of the learning management system in order to overcome some of the problems caused by these systems in virtual universities were provided. Then, the proposed model was approved by a survey of 15 experts in the fields of e-learning and communications and media. Based on the findings of the analysis of the collected data, the use of various social softwares in the LMS modules was confirmed and ranked in importance.

Objective: the aim of the present study was to investigate the role of anxiety sensitivity and attentional control in predicting the tendency toward addiction in youth. Method: The present study is a correlation type, in this regard, the number of 150 students were selecte through multistage cluster sampling. The attentional control questionnaire (Derryberry& Reed, 2002), anxiety sensitivity (Peterson& Reiss, 1987) and the readiness scale for drug abuse (Zargar, 2007) were performed on individuals. The research data were analyzed by the Pearson correlation coefficient and regression. Results: The results showed that there is a significant correlation between attentional control and the lack of cognitive control with the tendency to addiction. Conclusion: According to the findings it can be concluded that in addition to social and biological factors, psychological factors such as attentional control and anxiety sensitivity is influential in the tendency and readiness of individuals to drug addiction. Keywords: Attentional control, Anxiety Sensitivity, The tendency to addiction,students, health

Studying the concept of spirituality in tourism is neithera newapproach nor a study of a particular kind of tourism or simply a religious perspective to tourism. Rather, it is an indicator of spiritual contents that today’s tourism is submerged into discover and attain non-material values and the reality duringthe length of its journey. This research offers a new perspective in the study of the methodology of tourism studies with a descriptive-analytical approach, conjunctive viewwhile using library documentation and a review of theoretical foundations according to the fuzzylogicmethodology. The fuzzy logictheory possesses a more precise capacity to explain and analyze concepts and phenomena and also a spectral reading of phenomena thatuses the binary numbers of 0 and 1 as the extreme points of reality and accepts that there are infinite points of reality between the two of them; therefore, in order to more precisely and comprehensively understand reality, one must have a hierarchical view towardthephenomena. With this approach, spirituality in tourism includes a great variety of concepts and elementsthat are allambiguous and graded. These elements include reasoning and probing, religious denomination and beliefs, mutual relations, and quality of life and culture. The propositions of spirituality in tourism essentially exist in bothfuzzy and spectral logic,not justwith fuzzy logic because of the essential ambiguity existingin concepts and elements andtheir metaphysical aspects. Therefore, this study is built upon the studies related to spiritualityin tourismconducted through the fuzzy logicmethodologies. According to the obtainedresults, this important approach must be paid attention so that the great capacities of spirituality in tourism in the areas of knowledge and action can be correctly utilized.

INTRODUCTION: Increasing the incidence of natural disasters around the world has led to increased concerns about the social and economic development of developed countries. Natural disasters are inevitable, but they can be taken to reduce their negative impacts on countries. Organizations involved in managing these crises must regulate their supply chain and make the necessary changes to improve the performance of the humanitarian supply chain. METHODS: Data analysis by partial least squares method (PLS) was performed using smart-pls2 software and a researcher-made questionnaire with 25 questions that examined six structures. In this research, 320 questionnaires have been distributed. In the statistical population of the survey, there are military centers, fire brigades, Omer Crescent population, emergency 115, crisis management and renovation committee in the parliament, governorate, municipalities, supply chain managers, Active practitioners in this field, subject specialists (reference persons and perpetrators in this field), and other members of the organizations involved in rescue and rescue operations in Tehran (randomly selected from the 22 areas). Eventually, 193 people were involved in relief and rescue operations. The reliability of the model has been investigated and verified through three ways of evaluating factor load coefficients, Cronbach's alpha coefficients, composite reliability (CR). The average variance extracted (AVE) values are greater than 0.5, and CR values are larger than AVEs. That means convergent validity. Also, the mean of the AVE for each structure is greater than 0.50 and this is a sign of convergent validity. FINDINGS: For the model, GOF is 0.56; that means the model has a great fit. The statistics above show that the proposed model is suitable for data collection. In general, the proposed model confirms the relationship between the use of information technology, mutual trust, flexibility, agility, adaptability and performance of the humanitarian supply chain. Fit statistics have four indicators: Goodness of Fitness (GFI) of 0.92, Fitted Goodness Index (AGFI) of 0.9, Root RMSEA error of 0.04, and 360.88 x 360 times. Finally, the ratio of k2 to the degree of freedom for 1.38 is obtained, indicating the good of fitness of the model fit with the data. With the aid of p-values and T-Values 8 hypotheses were confirmed in this modeling. CONCLUSION: The results show that the agility and flexibility of organizations in the humanitarian supply chain are related to the use of information technology and organizational trust, which in turn affects performance.