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adopted here is Social Distance Theory. According to this view, the more social distance among people the less they influence each other. From this viewpoint an increase in social distance among kinsfolk leads to a decrease in mutual influence and this, in turn, affect the emigration tendency. This study is aimed at the investigation of the relationship between kinship solidarity and emigration tendency among educated people. The theoretical framework Based on this theoretical foundation, we have suggested that 4 main variables, the size of kinship network, the strength of kinship relationship, the frequency of kinship relationship, and the profundity of kinship relationship, have negative influences on educated people’s tendency to emigrate. A sample of social sciences and electrical engineering students of the University of Tehran has been surveyed and the empirical data have been analysed both in description and explanation levels. The results indicate that all of the above mentioned variables affect emigration tendency negatively and significantly. Also, our findings suggest that, generally speaking, a negative correlation between the above independent variables and dependent variable of emigration tendency is predictable. In particular, two variables (the strength of kinship relationship, and the profundity of kinship relationship) explain 35% of variances of dependent variable of the tendency to emigrate.

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Persian language has influenced Arabic language and culture more than any other culture and language. Examining the words translated from Persian to Arabic in ten major dictionaries: The dominance of Persian culture over other cultures influencing Arabic culture, the knowledge of cultural writers in Persian language and culture, and the richness of Persian language and literature, especially in urban areas, this research dates back to 1705 and unrepeatable need, in this Dictionaries have been obtained, which we have divided into 37 categories in this paper. If we consider the repetition of words, the number of these loanwords reaches more than 3500 words. This study depicts a corner of the cultural and lexical richness of the Persian language and the lexical and cultural poverty of the Arabic language. In this study, considering the prominent role of word and language in cultural exchange, we have pointed to a new angle of the influence of Iranian culture and literature in Arabic literature.

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It is in Meydani's Majma Al Amsal that 1000 Arabic proverbs of Al Movaledun have been defined:"Amsal hasn't Arabic identity, they have been borrowed from other cultures to Arabic language".  Meydani has no idea about the identity of Amsal , but whereas commentators believed that Iranian culture has been excessively influenced by revolving Arabic literature, it is lost to approve Iranian origin of Amsal to show Iranian cultural face before Islam through different events. Since there are multiple studies have been conducted to show Iranian identity of Amsal by examining concepts, and vocabularies of Iranian works. This study has tried to compare the concepts of Amsal Movaled and Iranian Tales of Amsal, in order to show the veins of Iranian identity in Amsal, because, Iranian culture and literature show the tales which conclude to those of Movaled proverbs, therefore, there is no doubt on their origins. While Meydani believes that all of the tales of Amsal were quoted, there is no tale to support the documentation of the study, it shows that the tales were not famous in Arabic literature in Meydani career. Such tales of Persian literature and culture are examples of Arabic Amsal in Iranian culture.

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Mnemiopsin, a Ca2+-regulated photoprotein from ctenophore Mnemiopsis leidyi, as coelentrate photoproteins emits flash blue light upon reacting with coelenterazine. In contrast to coelenterate photoproteins, there is a little information about the structure of chromophore binding site and bioluminescence mechanism in ctenophore photoproteins. In this study, three important amino acid residues in coelenterazine binding cavity of mnemiopsin were substituted by corresponding residues in the well-known coelentrate photoproteins. W59K, N105W and L127W mutants were constructed and characterized for investigation of hydrogen bond network around the important rings of coelenterazine. All three mutants are completely inactivated. In addition, the results of structural studies including CD, intrinsic and extrinsic fluorescence together with theoretical studies showed that these mutants, especially for N105W and L127W, have found different structural features. These results suggest the presence of the residues in binding cavity and/or a mechanistic role for these residues. It seems that arrangement of amino acid residues in the binding cavity of coelenterate and ctenophore photoproteins are different, so that the replacement of these residues with their corresponding residues in other group (such as mutations in this study) perturbs the structural integrity needed for bioluminescence activity.

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Research subject:Well-designed plastic foams, with respect to their cell density and cell size, open-or-close cells, and the cell uniformity, compared to their counterpart unfoamed plastic parts, beside of having the advantages of less material consumption, dimensional stability, better processability, and a higher surface quality, they can have superior mechanical and physical properties, including strength to weight, impact strength, thermal and dielectric properties. The temperature distribution in the different zones of the extruder, the qualities and quantities of the nanoparticle additives and their dispersion in the polymer matrix can have significant effect on the mechanical properties of the produced foams by the extruder.
Research approach: In this study, using an extruder, MA-g-polypropylene microcellular foams, containing 3, 7 and 9 wt% of nano-clay particles, were produced under three temperature arrangements on the extruder and the material and the processing effects on the mechanical properties were investigated.  
Main results: The result of this investigation shows that adding of nanoclay improves the mechanical properties of MA-g-PP.s foams. As an example, the results show that the sample with 7 wt% of surface modified nanoclay, owns about 10% higher impact toughness compared to the samples produced without nanoclay. Also for the same samples a rise of about 5% was recorded in Young's modulus. The microstructural studies of the produced foams by scanning electron microscope (SEM) show that adding of nanoclay can result on more foam uniformity and smaller cell size. In this study, the smallest average cell size (87.5 μm) and the lowest density (0.3 g/cm³) were recorded for a sample with 7wt% nanoclay.

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In today's turbulent and uncertain environment, every company is exposed to disruption in their supply chain. A disruption is an event that can disrupt normal flow of products, information and financial supply chain that this could be have a negative effects on performance areas of operational, financial and market, so understanding how companies can manage their supply chain disruptions has become an important issue among academics and professionals. In order to confront against this disruptions, supply chains should be design multidimensional to give an effective and efficient response, able to recover to its original state, or even to improve their circumstances after the occurrence of the disruptions and this is what is called supply chain resiliency. In this study, after studying related literature to supply chain resilience as well as interviews with experts in the field of supply chain, 12 factors where identified which are effective in achieving resiliency in supply chain. Moreover, in another interview with experts, the relationship and the importance of identified factors in the Interpretive Structural Modeling (ISM) were recognized. The results illustrate that elements of redundancy, innovation and information sharing are known as supply chain resiliency infrastructures.

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Considering the growing competition and increasing attention toward productivity and cost reduction among firms, quick access to pertinent information has become a competitive advantage for them. Relying on this up to date information, they can reduce their costs by decreasing their inventory, speeding up material flow, taking consumer view in to account etc. in this study we investigate the relationship between enterprise resource planning (ERP) system and supply chain management where Oracle Purchasing Module implemented in Zob Ahan enterprise. Statistical population of the study is operational employees of Zob Ahan enterprise in Isfahan and the sampling method is simple stochastic. Required data is gathered through a questionnaire and we use SPSS and SmartPLS in order to analyze them. Findings of this research indicate that ERP Components including Integration, Material management, Production planning, and controlling have positive impact on supply chain management.

 

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Knowing customer behavior patterns, clustering and assigning them is one of the most important purpose for banks. In this research, the five criteria of each customer, including Recency, Frequency, Monetary, Loan and Deferred, were extracted from the bank database during one year, and then clustered using the customer's K-Means algorithm. Then, the multi-objective model of bank service allocation was designed for each of the clusters. The purpose of the designed model was to increase customer satisfaction, reduce costs, and reduce the risk of allocating services. Given the fact that the problem does not have an optimal solution, and each client feature has a probability distribution function, simulation was used to solve it. In order to determine the neighbor optimal solution of the Simulated Anneling algorithm, neighboring solutions were used and a simulation model was implemented. The results showed a significant improvement over the current situation. In this research, we used Weka and R-Studio software for data mining and Arena for simulation for optimization. The results of this research were used to develop Business Intelligence software for customers in one of the private banks of Iran.

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This paper focuses on the issue of decision making in context of uncertainty and in particular on decision making in innovation and knowledge-based Firms. Decision making in uncertain conditions has many complications that make it difficult to rely solely on analyzes and common models in decision making. Meanwhile, the need to consider alternative methods, especially in the real environment of decision making, is felt. In this research, with a descriptive approach, the model of this type of decision is specifically defined in knowledge-based firms with a quantitative method and structural equation modeling. Statistical analyses were performed on 320 researcher-made questionnaires containing 77 items. Smart PLS software was used for modeling. The obtained model shows that time and information categories play a significant role in creating uncertainty. This uncertainty ultimately leads to the decision-makers' reliance on intuitive decision-making. Underlying conditions and interventions include environmental turbulence, rivals, market changes, technological changes, changes in environments, experiences, education, curiosity, and patterns of mental patterns effect on intuitive decisions that themselves include improvements in speed and accuracy of decision making, creativity, satisfaction and performance of the company.

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This article investigates the role of Conceptual Metaphors of 3 behavioral economics biases, including Irrational Evaluation, Labeling, and Replacing market values with social values on Willingness to Pay (WTP) and Willingness to Accept (WTA) of Participants. To extract experimental, conceptual metaphors, the results of field studies were checked on a group of 30 participants in the first phase. In the second phase, we used the semi-pilot method on 30 other participants through 2 stages for investigating conceptual metaphors. Analysis of variances showed that that the conceptual metaphors used in this article do not influence Willingness to Pay and Willingness to Sell. However, in Willingness to Pay status, among other biases, the impact of irrational evaluations conceptual metaphors has stronger effects, whereas, in Willingness to Accept status, replacing market values with social values is stronger than other biases. The results of this research showed that three mentioned behavioral principles that were implemented through conceptual metaphors, couldn't influence buying or selling decisions of participants significantly, but the efficacy of these behavioral principles were different in buying and selling decisions.
1. Introduction
Cognitive linguistics is a new school of linguistics that emerged in the early 1970s due to objections to formal linguistic approaches in Chomsky's views. Cognitive linguistics, like other types of linguistics, studies language and tries to describe the systematics, structure, and function of the language system. One of the most fundamental concepts in cognitive linguistics goes back to conceptual metaphor. Conceptual metaphors mean recognizing one domain through the characteristics of another domain. A simple definition of conceptual metaphor is that "conceptual domain A is conceptual domain B". The conceptual domain itself is any coherent organization of experiences. In this regard, one of the interdisciplinary approaches that has received much attention today is the focus on cognitive linguistics through conceptual metaphors in other areas. It seems that by using conceptual metaphors and examining their effect on perception, judgment and reasoning of individuals, a deeper understanding of cognitive processes can be achieved.
Accordingly, and according to previous research that shows that conceptual metaphors can subconsciously affect the way of thinking of people in various fields, in this study, the role of conceptual metaphors in the background of behavioral economics was investigated. The reason for choosing behavioral economics over neoclassical economics is the objections to the two main pillars of neoclassical economics, "The emphasis on individual rationality and General equilibrium". Individual rationality means that in neoclassical economics it is assumed that people do not include emotions in their decisions, while behavioral economics is based on anthropological studies with psychological methods based on the inclusion of emotions in economic decisions.
 This article examines the effect of conceptual metaphors on the rules of behavioral economics. For this purpose, with reference to cognitive linguistics, we introduce some rules of behavioral economics in the form of conceptual metaphor theory and then in a quasi-laboratory study, we examine the effectiveness of presenting behavioral economics rules through conceptual metaphors in statistical form. In the first phase of the research, we select conceptual metaphors related to the three behavioral rules of irrational valuation, labeling and replacing market values ​​with social values. Then, in the form of the fourth hypothesis, we examine the effect of the relevant conceptual metaphors on the willingness to pay and the willingness to Accept as two factors representing economic decisions.
Research Hypothesis instead of questions
 (s)
Hypothesis 1: Conceptual metaphors related to the best examples of goods in this paper affect the implementation of the behavioral rule of irrational valuation.
Hypothesis 2: Conceptual metaphors related to femininity labeling used in this article, affect the implementation of the labeling rule.
Hypothesis 3: Conceptual metaphors related to social values ​​used in this paper, affect the implementation of the rule of replacing market values ​​with social values.
Hypothesis 4: The use of conceptual metaphors in implementing the rules of behavioral economics considered in this paper (irrational valuation, labeling and substitution of market values ​​with social values) affects the willingness to pay (WTP) and willingness to receive (WTA) of the test subjects.
 
2. Literature Review
The main reason for studying cognitive linguistics is the assumption that language expresses patterns of thinking. Therefore, the study of language from this perspective is the study of conceptualization patterns. In this approach, language is a window to cognitive function and through language, the nature, structure and organization of thinking and mental ideas of individuals can be studied (Evans, Green, 2006). In cognitive linguistics, language is a tool for organizing, processing and transmitting information (Dehghan et al., 1399). One of the most fundamental concepts in cognitive linguistics goes back to conceptual metaphor.
Conceptual metaphor has been extensively studied in linguistic texts but recently, cognitive linguistics has taken a new direction and is examining conceptual metaphors and their role in other sciences as well.
Among these studies are researches that have examined conceptual metaphors in economics. There are two general approaches to the introduction of cognitive linguistics into economic discourses: The first approach is that linguists try to identify the dominant metaphors used in these texts by examining the main and fundamental books of economics in order to find out what metaphors in the foundation of economics is used to provide insight to economics students, and another approach is for linguists to try to show the results of applying these metaphors in practice by selecting up-to-date corpus of economic texts and extracting the dominant metaphors used in them. In view of the above, in order to conduct a joint research between cognitive linguistics and economics with a forward-looking view, in this study, we examined the role of conceptual metaphors in representing the rules of behavioral economics. Before presenting the report of the present study, we will first explain why behavioral economics was chosen as well as its basic foundations.
 
2.1. Why choose behavioral economics (negation of neoclassical economics):
 The main feature of neoclassical economics is its commitment to the theory of rational choice. This practice assumes that people behave in the way they should. If we want to argue according to the neoclassical economics assumption, one hundred percent rational people should not be influenced by emotions. However, financial decisions are generally subject to multiple biases (Guastello, 2016).
       Behavioral economics, in fact, came into being by violating the basic hypotheses of neoclassical economics based on the rationality of individuals and the cumulative equilibrium of the market. From the perspective of behavioral economics, individuals are not always rational, but their irrationality is not without rules but with recognizable rules (Walliser, 2008; Bourgine & Nadal, 2004). At the same time, prices are not simply derived from the intersection of supply and demand in the market, but the price that the consumer is willing to pay may have been completely manipulated by the supplier. Findings of behavioral economics in the field of irrational behavior as well as the way prices are set in the market are the same principles and rules of behavior, such as the effect of ownership, labeling and deterrence (Ariely, 2008). Behavioral economics, in fact, seeks to achieve a more accurate study and prediction of consumer behavior by guiding these rules. In order to get acquainted with behavioral economics, it is necessary to introduce some of its rules:
 
3. Theoretical framework
3.1. Rules of Behavioral Economics
A) Irrational valuation
People seldom consider the absolute and independent value of goods and services in their choices. There is no tool within humans to measure the value of options. Rather, we focus on the relative value of one thing over another and estimate value in this way (Ariely, 2008).
B) Difference in look - labeling
 Expectations also shape the headlines. One example is how to classify information in order to predict experiences. The brain cannot evaluate any new situation from scratch, and grouping or categorization helps the brain a lot in the meantime (ibid).
C) Social relations and market relations
We live in two worlds at the same time. One is a world in which social norms prevail and the other is a world in which market norms prevail. Social norms include friendly demands that people make (ibid).
In view of the rules of behavioral economics presented above, in this study we explored whether it is possible to represent the rules of behavioral economics through conceptual metaphors.
 
3. Methodology
This research was designed and implemented in two phases as follows.
 
4.1. Phase I subjects
This experiment was performed in two separate phases. Thus, the results of the first phase were indicative of the materials of the second phase of the experiment. Participants in the first phase initially consisted of 30 female students (because gender affects the dependent variable in the form of an independent variable of conceptual metaphors of labeling bias) studying in academic disciplines other than economics between the ages of 18 and 35.
 
4.2. Tools and process in the second phase of testing
In the second phase of the research, the conceptual metaphors selected from the first phase were used in three ways to prepare the main experimental materials.
 
4.3. Design of the second phase of the experiment
The method of designing the test materials was that the C-Sharp software was used to design the tests in order to be able to view the goods, specifications and also their prices along with the possibility of selecting the price desired by the subject by clicking on the Yes or No option for each price step.
 
4. Results
Finally, the study of hypotheses one to three of the present article on the effect of conceptual metaphors in implementing the behavioral rules of irrational valuation, labeling and replacing market values ​​with social values ​​showed that these three hypotheses are rejected by univariate analysis of variance but the forth hypothesis was not rejected.
The reasons might be as follow: The first category of reasons included the method of selecting our conceptual metaphors in the first phase, as well as the way in which they were explicitly displayed at the beginning of the introduction of the goods. At the same time, considering the achievement of examining the fourth hypothesis that conceptual metaphors related to irrational valuation are more effective in the task of purchasing and conceptual metaphors related to replacing market values ​​with social values ​​can be used in future research in these two areas to produce conceptual metaphors. He acted in a different way.
 
5. Discussion
In this study, we tried to find out whether it is possible to implement the three rules of irrational behavioral valuation, labeling and replacing market values ​​with social values ​​through the use of related conceptual metaphors. No further study has been done on the application of conceptual metaphors in behavioral economics. Examination of Hypotheses 1 to 3 of the present article on the effectiveness of conceptual metaphors in implementing behavioral rules of irrational valuation, labeling and replacing market values ​​with social values ​​showed that these three hypotheses are rejected. The reasons for rejecting these three hypotheses can be examined in two areas: First, the way our conceptual metaphors are selected in the first phase does not affect their Maximum Payout (WTP) and Minimum Receipt (WTA) decisions, respectively. It has been traded in assignments, and thus it can be stated that choosing different conceptual metaphors in this field in different ways can bring us different results. At the same time, in this area, the use of our conceptual metaphors explicitly at the beginning of the introduction of goods may have made the subjects aware of our purpose and has caused resistance to changing the decision to buy or sell. The second reason that can be stated to refute these three hypotheses could be that for our subjects, only purely technical information of the goods was important in the decision to buy and sell, and the sentences we used at the beginning to introduce the goods with metaphors, has had no effect. Examination of our fourth hypothesis on the effectiveness of conceptual metaphors related to the three types of irrational valuation bias, labeling and replacement of market values ​​with social values ​​showed that this hypothesis is not rejected, while the post hoc test showed that conceptual metaphors are most effective in buying when being related to irrational valuation, and while in the case of sales, the most effective were the conceptual metaphors related to the replacement of market values ​​with social values, while the conceptual metaphors related to labeling were not significant in this area
 
6. Conclusion
our results show that in order to influence the rules of behavioral economics through conceptual metaphors, one must either use another method to extract conceptual metaphors or introduce conceptual metaphors implicitly rather than explicitly into the economic presentation of goods. At the same time, the greater effectiveness of conceptual metaphors of irrational valuation in the task of buying and the effect of conceptual metaphors of replacing market values ​​with social values ​​in the task of selling can be promising. And therefore could be further explored in future research.

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Hydraulic engine mounts isolate the structure of the vehicle from powertrain vibrations and also prevent excess motions of the powertrain due to shock excitations. In this paper, dynamic stiffness of a hydraulic engine mount in low frequency range (shock frequency range) is predicted using modal test data and three-dimensional finite element model through an iterative model updating procedure. The implemented model encompasses elastomeric material’s nonlinearity, fluid-structure-interaction and internal resonances of mount. Mesh morphing technique is used to model the fluid-structure-interaction. The results showed that the introduced procedure can successfully predict the shock isolation behaviour of the hydraulic engine mount.

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In recent years,the need for low power electronic circuits like sensors and wireless systems, has been considered by many researchers.Excessive weight, limited lifetime of the batteries and also having problem in replacing them, are the main reasons for harvesting energy from ambient vibrations. Among the various sources of environmental energy, mechanical vibrations, has gained popularity due to the availability. Among the different methods of ambient vibration energy harvesting, piezoelectric method, is one of the good ways to harvest energy due to the favorable effects of electromechanical coupling. The most common means of harvesting energy from vibrations, is a unimorph or bimorph cantilevered beam. In the present paper, electrical energy harvesting from Euler-Bernoulli trapezoidal cantilevered unimorph beam with base excitation using distributed parameter method has been considered. First, equations of motion analytically obtained and then using Assumed modes method(for rectangular beam), system’s natural frequencies is calculated and output voltage, current and power diagrams are presented. For verifying results, presented voltage, current and power diagrams for trapezoidal configuration close to rectangular configuration that it’s results are published in references, will be compared. Then, functional parameters for trapezoidal energy harvester, with resistance value changes for energy consumer has been analyzed.

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One of the most important principles of the postmodern world is to pay attention to the principle of "indeterminacy." Postmodern writers, using the techniques of this principle, have shown that reality is more than building, and this is what we are giving to that meaning and being. It can be said that the principle of indeterminacy in Persian literature was written by Mohammad Reza Kateb in the publication of the "pasti" novel Practically applied. In this novel, the author is surprisingly using techniques such as "contradiction, the plurality of personality identities, behavioral deconstruction of characters, the gender change of characters, ambiguity, short-circuiting, and also linguistic-level practices, such as the use of factual expressions in the context of appeals, submissions, and Epistemic, object oriented orientations, deliberate decay in the rhetorical sequence of sentences, the use of arbitrary command structures, the use of linguistic games at the narrative level, the use of techniques such as genre contradictions, the use of story styles in the story, nameless names, ruptures, and multiplicities This article is intended to show the unknown world of " indeterminacy " in the "pasti" novel, which is undoubtedly one of the most prominent novels of the eighties.

 

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Employing piezoelectric systems is one of the suitable methods for harvesting energy from mechanical vibrations available in the environment. In this work,single degree of freedom model for cantilever beam with piezoelectric layer is considered. Simulation contains nonlinear coefficients like: stiffness, damping and coupling coefficient. Governing system of equations is solved by multiple scales method. First with assuming one term in approximate response, the effects of all nonlinear parameters on frequency curve are investigated. Results show that assuming only one term in response evaluates the effect of nonlinear damping correctly. Increasing this coefficient leads to reduce the range of excitation frequency and maximum harvested power. But one term assumption couldn’t assess the effects of nonlinear stiffness and coupling coefficient logically. In this case, the peak of frequency response curve is independent of nonlinear coefficients. So for obtaining accurate results assuming at least two terms of response is necessary. Results show increasing nonlinear stiffness coefficient increase the maximum harvested power and the range of excitation frequency. The effect of nonlinear coupling coefficient is decreasing the maximum power because this coefficient increases the stiffness of the system.

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According to Herman Dooyeweerd, understanding the phenomena in everyday life, unlike theoretical frameworks, has a multi-aspectual nature so that none of the aspects is reduced to others. Enterprise Resource Planning (ERP) system includes processes and best practices, which will be transferred to the adopting organization as explicit knowledge. If this knowledge transforms is a part of the end users’ tacit, knowledge may bring success to the system. The end users, in order to do their every day work, have to deal with the system and come to a kind of understanding of the system. In this study, by using Dooyeweerd’s multi-aspectual framework, a model of the end users’ understanding of the system is extracted. This study has been conducted through a quantitative design through which using a questionnaire devised based to the multi-aspectual framework, quantitative data are gathered through a target sampling process. The data are analyzed based on both measurement and structural models and by using the path analysis, the effects of general norms on the system’s success and also the effects of all aspects on general norms are investigated. Data analysis showed that, according to Meeting objectives, User satisfaction and Emancipation as general norms, the ERP’s success in order to be completely realized requires that each general norm is considered as a multi-aspectual criterion. Evaluating ERP success according to end users point of view brings more visibility to some issues, which are usually ignored or missed by uni-aspectual approaches.  Furthermore, utilizing Dooyeweerd’s framework as a life-oriented philosophy for evaluating the ERP’s success is a novel work, which may lead to a kind of  development and enrichment in the ERP success literature.  

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In modern business environments, agility is advocated as the fundamental characteristics for competitiveness. Little research, however, exists which provides integrated methodologies suitable to be practically adopted to enhance agility of companies. In this research, we utilized an original approach, which, by linking competitive bases, agile attributes and agile enablers, aims at identifying the most appropriate enablers to be effective for increasing company´s agility. The approach is based on the quality function deployment (QFD) methodology, and, in particular, on the house of quality (HOQ), which has been successfully adopted in the new product development field. The whole scaffold exploits fuzzy logic, to translate linguistics judgements required for relationships and correlations matrixes into numerical values. In point, this approach applied in Auto Part industry (case study: Bahman Khodro Group) and identified suitablt enablers in this industry. Supply chain management in this industry was recognized as the most important enabler . knowledge management, information technology, concurrent engineering, team building, project management, hardware, and were then placed in the ranks. The main limitations of this research can be time consuming due to the calculation of the QFD cited. In this study, due to better express dependencies and Correlations at HOQ fuzzy numbers were used to describe the relationship accurately.

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Jet engines working near the ground, with low speed and high thrust can experience flow separation between ground and inlet which would lead to vortices, called Ground Vortex that have harmful effects on engine performance and can disrupt integrity of inlet flow. Deep understanding of the physics of this phenomenon could omit the injuries of foreign objects damages, engine surge, compressor stall, and fan vibration. In this study, the ground vortex formation near the inlet air duct of an aircraft engine is investigated using computational fluid dynamics. Simulations are performed for a 1:30 scale. The fluid flow is assumed to be compressible, three-dimensional and steady.The k-ω SST model is employed for incorporating turbulent characteristics. After mesh study, the boundary of Vortex or No-Vortex for results of this study compared with a theoretical and an empirical correlation by Murphy which showed good agreement. Moreover, despite free stream existence, decreasing non-dimensional velocity ratio causes the movement of vortex core and by approaching to the critical non-dimensional velocity ratio; the ground vortex would gradually disappear. For U^*= 33,44,66,132 ground vortex is formed, but for U^*=26.4 ground vortex disappears. The computational method has subsequently been applied to configurations that are difficult to test experimentally including headwind flows. According to this study, the formation of the vortical flow field permanently affects the total pressure distortion on the engine fan face. In this paper, DC60 is calculated under headwind condition. These coefficients are 0.39, 0.391, 0.447 and 0.3957 at U^*=33,44,66,132 respectively.