جواد محمدی

Present research work aims to the dynamic behavior of two rigid articulated pipes conveying fluid is considered. The velocity of fluid motion is harmonic. By training neural networks intend to determine the effects of initial velocity, ratio fluid mass per total fluid mass and pipes mass and flow frequency are studied. In this article, the back propagation method is applied to design the neural network algorithm and using matlab software, modeling and estimation of the time response for different modes have been done. Using the model designed by the neural network, it has been shown that the time response error is less than 0.004.

Present research work aims to analyze free vibration of rectangular Functionally Graded Material Plates with Non-ideal simply supported boundary conditions which one of its edges has small non-zero deflection and moment. Using the classical theory of plates, the governing equations of the plates are obtained, using perturbation theory, the equation of the plane and the critical frequency are calculated. By Training neural networks intend to determine the critical frquancy functionally graded plates by various input parameters length, width and Integer half-wave coefficients. In this article, the back propagation method is used to design the neural network algorithm and Using Matlab software, modeling and estimation of the critical vibration frequency for different modes have been done based on the parameters affecting the plates. Using the model designed by the neural network, it has been shown that the estimated natural frequency error is less than 0.005.

In this research work, various derivatives of the heterocyclic system, imidazo [4,5-a] acridines, which have a suitable history of biological activities, were prepared using the reaction of alkylated benzoimidazole compounds with different aryl acetonitrile in high yields. After purifying and proving their structure, their interaction with urease enzyme was investigated experimentally. The experimental results of their IC50 investigation show that these compounds have a very good inhibitory ability against urease enzyme compared to the thiourea standard. Also, in order to more closely examine the interaction sites in the desired ligands and urease enzyme, simulation and molecular docking methods were used. Studies show that the chlorine derivative has the most interaction with urease. The examination and comparison of experimental and calculation results shows that these studies are very suitable and close to each other.

One of the most important motor motivations in human beings is competition, which is rooted in such things as feeling short, and jealous, getting rid of imperfections, and achieving perfection. The realization of competition in society and among individuals leads to the formation of positive and negative competition, which is traditionally referred to as keeping up with the Joneses, which can be considered in both positive and negative fields. Therefore, the author has studied the subject of keeping up with the Joneses and all the positive and negative aspects according to verse 108 of Surah Yusuf and verse 179 of Surah A'raf by descriptive-analytical method and library type. By analyzing the Quranic verses and the documents of the narrations of the two sects regarding these verses, we reached the following findings. Neglect is the main factor of competition and the negative aspect of keeping up with the Joneses and insight is the main factor of competition and the positive one.

Employees can perform their tasks well when they have the necessary skills, knowledge and ability to know the goals of the organization well. One tool that can help managers in this regard is the process of psychological empowerment. The present study examines the dimensions, components andindicators of an effective model of psychological empowerment of AJA university staff from the perspective of experts of this organization. The research was applied in terms of purpose, qualitative in terms of approach and descriptive in terms of research method. The statistical population of the study consists of all DAFOOS AJA experts in the field of psychological empowerment who have a thorough knowledge of the organization and its goals and tasks. The sampling method was purposive and the number of samples continued until the theoretical saturation (in this study, the theoretical saturation was 10 experts). The assessment tool was a semi-structured 60-item questionnaire that was collected by the researcher, which was collected after reviewing the previous findings and then sent to the experts in two stages using fuzzy Delphi technique, and finally 61 final questions were obtained. Findings indicate that the effective model of psychological empowerment of AJA University staff, consisting of 3 dimensions of individual, organizational, meta-organizational and 12 components of personal traits, mental health, belief, moral, special abilities, management strategies,Organizational culture, organizational structure, cultural - social, economic, political-legal and technological.

One of the main challenges of productive economic activities in the country is the limitation of access to financial resources despite the high level of total liquidity of the country as well as international capacities in the field of financing. This situation indicates incomplete and ineffective liquidity and credit management. One of the effective means of directing internal and external liquidity to productive economic activities are sukuk, which have been used by Islamic countries. This study deals with the issue of whether financing through international sukuk has had a significant impact on the growth of Islamic countries that this experience can be used in order to finance productive activities of the country. In this regard, the Gulf cooperation council countries have been investigated during the period of 2001-2020 using the combined data regression approach. The results show that the issuance of sukuk has a significant effect on the economic growth of the studied countries, and if properly planned and politicized, this instrument can be a breakthrough in Iran.

Identifying operational maintenance damages in the field of materials, parts, fluids and how to store them can be effective in the correct implementation of operational maintenance. Considering that the organization's armor conservation systems are facing damages and problems and have reduced the effectiveness and efficiency of the current system, this research can provide suitable solutions to solve the problems of the operational maintenance methods. present these problems. This research is practical and in it, the collected experiences of commanders, experts and officials of the organization have been exploited. Also, the research method is descriptive-analytical, which the researchers tested by using a questionnaire among 47 net experts, regarding the identification of the damages of the operational maintenance method of the armored devices of the combat units that could be relevant. The validity of the questionnaire was confirmed by using the Lauche coefficient, and the reliability of the questionnaire was confirmed by using Cronbach's alpha of 0.89. The results of the research show that the most major damages and problems in the implementation of the operational maintenance method of the armored devices of the organization's units in this area are: fluid damage, damage to space and storage space, damage to parts and equipment. And the main damages in these components are, respectively: the use of improper, non-standard and low-quality engine oil, grease and fuel, and improper storage in the warehouse in terms of moisture and dust.

Employees can handle assigned tasks well when they have the necessary skills, knowledge and ability and know the goals of the organization well. A tool that can help managers in this field is the process of psychological empowerment. Therefore, the purpose of the present study was to investigate and analyze the importance and cause and effect relationships of the dimensions and components of the effective model of psychological empowerment of the employees of command and staff University and the headquarters of the Islamic Republic of Iran Army from the point of view of the experts of this organization. The research is applied in terms of purpose, qualitative in terms of approach and descriptive-survey in terms of research method. The statistical population of the research was formed by 40 experts from the Command University and the Headquarters of the Islamic Republic of Iran Army in the field of psychological empowerment - who had complete knowledge of the organization and its goals and tasks. The purposeful sampling method, the number of sample people, 10 experts and the measurement tool, a questionnaire based on Dematel technique was made by the researcher and the calculations were done with the help of Excel software. The findings of the research indicate that the "organizational" dimension is the most influential and the "individual" dimension is the most influential, the "management strategies" component has the most influencing power and the "special abilities" component is the most influential component. "Organizational and extra-organizational" dimensions are part of the cause factors and the "individual" dimension of the disabled factor, the components of "management strategies, organizational culture, organizational, cultural-social, economic, political-legal and technological structure" are part of the cause factors and components of "individual traits, mental health”, religious, moral and special abilities are considered among the disabled factors.

Organizational hypocrisy is considered as one of the sources of corruption and also as one of its consequences that overshadows all aspects of the organization. When the complication of hypocrisy arises at the high and strategic level of the organization and is linked to organizational policies, it creates greater and more serious risks and problems. The aim of this study was to design a model for measuring the hypocrisy of organizational policymakers in government organizations. 

This research is among the qualitative and exploratory researches that were done using the data method of Grounded theory. The statistical population of the study was experts (managers of government organizations in Lorestan province) and 24 of them were selected as a sample by snowball method. The research tool was a semi-structured interview that was finally analyzed using open, axial and selective coding methods.

In the open coding section, 176 codes were extracted. In the axial coding section, 62 codes were placed in the form of 12 selected codes, thus forming a conceptual model of the research.   

According to the research results, the causal factors identified in the field of policymakers 'hypocrisy include two spectrums of individual and organizational factors, and the employment conditions that create hypocrisy and the conditions that create hypocrisy are among the underlying factors of policymakers' hypocrisy. On the other hand, the central phenomena in the present study were identified in the form of two axes of organizational hypocrisy and hypocritical behaviors. Hypocrisy coping strategies and the consequences of organizational hypocrisy are also other components of the model.

The coronavirus has posed significant challenges to organizations' talent management systems. Therefore, a model for talent management of sports organizations has been designed and validated to adapt to this situation.

This research is mixed (qualitative-quantitative) in terms of applied purpose and collection method. This study's statistical population comprised experts in sports management at the university, many implementations, and the Ministry of Sports and Youth staff. The purposive sampling method was used for qualitative sampling, and sampling continued until the theoretical saturation was reached; based on this, 15 interviews were conducted. In the quantitative section, 405 samples based on the number of parameters calculated in the qualitative area were randomly selected. Coding and confirmatory factor analysis were used to analyze the data: The structural-breath (ISM) method and ISM software.

The results showed that talent management of sports organizations is a function of causal factors (strategic agility, diversity management, convergent innovation, flexibility maturity, business intelligence, electronic knowledge management), contextual (online learning and training, organizational transformation, digital transformation) And interventionist (globalization, turbulent atmosphere, global mobility) and by applying blockchain implementation strategies for selection and recruitment, electronic human resource management, strategic alignment and strategic identification of human capital, one can expect personal and organizational consequences. It was positive for sports organizations. Based on the obtained results, talent management in sports organizations is affected by causal, contextual, and intervening conditions, and in dealing with them, the mentioned organizations need a blockchain system for selection and employment. Plan and implement e-human resource management, strategic alignment, and strategic identification of human capital.

Originality: 

One of the challenges of today's sports organizations is talent management. In this research, an attempt was made to provide a comprehensive model in this field with a comprehensive view and simultaneously with the outbreak of the Corona pandemic.

Sport organization in competitive environment need an effective performance appraisal system for developing, growing and sustainability that with it evaluate effectiveness and efficiency of organization programs, processes and human resources. The aim of present study was to provide a combined model of Fuzzy AHP and numerical taxonomy analysis for sport organizational ranking and performance appraisal in which subjects were Esfahan youth and sport offices. This research is a type of applied research, which was conducted in a descriptive and field-based. Statistical society was the top managers of Iran’s youth and sport offices that 297 people were selected by accessible sampling. In the first step, related indices with four balanced scorecard perspective were identified, for what scientific resources, research background, professional comments, and finally confirmatory factor analysis were used. At the end, 41 indices were identified and classified in BSC four perspectives. After confirmation of final construct of balanced scorecard, Fuzzy Analytical Hierarchy Process was used, in order to identify weight of indices in every four perspectives of balanced scorecard. Then, using numerical taxonomy method, 26 youth and sport offices in Esfahan were ranked. According to the results, youth and sport offices of Esfahan city, Najaf Abad, and Shahin Shahr were in first to third places, respectively. Finally a model was provided in order to performance appraisal and ranking sport organizations using the previous path. The provided model not only can identify studied organizations situation in every executive areas, but also can make a framework for better management and efficient performance.

It seems that sport as an important part of development is sustainable development. The purpose of this research is the perspective of strategic land-use planning for Iran football. The statistical society, sports experts Iran. A total of 70 people were selected through purposive sampling snowball method. A combination of qualitative and quantitative methods coefficient initial questionnaire and open interviews and ratings were used for data collection and analysis. The research instrument was a self-made check list in which respondents were asked to indicate the strengths, weaknesses, opportunities and threats of the sport's List, while using geographic information system (GIS) to provide descriptive-analytic model, and part of the data in the software Arc - GIS analysis to investigate. The overall result of the study showed that treatment football in Iran, uneven distribution of places and spaces across the Iran, there is football, In addition, with regard to the Matrix positioning and strategic action status table football Iran was competitive.

The Islamic Republic of Iran Vision aimed to direct development plans and yearly budgets. As one of the most important part, it includes 13 economic goals for directing economic route of the country for a twenty years period. After 15 years, evaluating how the country achieved to these goals is very important and unfortunately neglected. In this article, considering the different nature of goals, we designed a composite index and commuted the results using relative gap scoring method and two distinct model of weighting (first using same weights and second using principle component analysis) in 2005-2019. The results indicate that relative gap to vision economic goals have raised from 32.2% (or 35.7 based on equal weights) in 2005 to more than 51% in 2019. Uncertainty and sensitive analysis in concern of weighting system using Monte Carlo simulation shows that in 95% confidence interval, apart from weighting methods, the has raised significantly. “First place in the region in the realms of knowledge” is the only goal which has achieved completely and except “achievement of full employment”, “being developed” and “First place in the region in the realms of technology” relative gap from goals has risen during time.

Apostasy, meaning disbelief after faith, is one of the most controversial jurisprudential and legal issues and is divided into national and natural, each of which has a different ruling. There are different views about natural apostates in jurisprudential sources. Findings of the present research, using main and specialized sources based on descriptive-analytical method, show that all punishments are Ta‘zirs (offenses at the discretion of the judge), except those that according to authentic texts are Hodud (offenses fixed by the Quran or Hadith), such as adultery, sodomy, drinking alcohol, etc. The main issue in this research is accepting the repentance of the natural apostate in absolute terms, and the three sentences of execution, separation from wife and iddah of death (the waiting period after the death of husband), and the inheritance of heirs are overturned by the repentance of the natural apostate. In the meantime, we can refer to the views of Shahid Thani in Masalek and Lomah, Ghazi Ibn Barraj and Ibn Jonayd. One of the innovations of this research is the principle of Ta‘ziri nature of punishments and the lack of fixed punishments for all Ta‘zirs.

Fluid contact structures as a branch of the Fluid–Structure Interaction (FSI) are among the physical models that have been able to present themselves as a new example of dynamic systems due to their very rich dynamics and Pay close attention to scientists. The dynamic behavior of two rigid straight articulated pipes conveying fluid is studied. The flow rate in the pipe is harmonic. The numerical results are compared with the present method and Runge–kutta 4th order for validation and an acceptable match between them is obtained. The method of multiple time scales is used to drive the time response and phase plane curves. The influence of the initial velocity , ratio fluid mass per total fluid mass and mass of pipes and flow frequency on the time response and phase plane curves are examined. The results show, by increasing "u" _"0" and and decreasing the system is closer to loss of stability and increasing dynamic chaos.

Overuse of the Internet, especially in the form of addiction, can disrupt students' academic progress. Many students are seriously exposed to this damage for a variety of reasons, including the possibility of using unlimited internet in the campus environment. Many of them do not have the skills necessary for proper learning, for example they are unable to monitor, guide and regulate their learning process.Internet addiction has high prevalence among students and most of them do not have the appropriate skills for academic learning. Information literacy can be effective in these structures. This study aimed to determine the role of information literacy in self-regulated learning and Internet addiction.

The research method was descriptive-correlation. The statistical population graduate students in Tehran that 183 of them participated in the study by convenience sampling method and responded to Self-regulated learning scale, Internet addiction scale and Information literacy scale.

Data analysis using Pearson correlation and regression analysis showed that Information literacy has a meaningful and positive relationship with self-regulated learning, but has a significant negative relationship with internet addiction. Information literacy can also predict Internet addiction and Self-regulated learning.

This finding implied on the importance of information literacy in increasing self-regulated learning and reducing of internet addiction.

The purpose of this research was to codify strategic land-use planning concepts of Iranian football. The statistical population of this research was Iranian football experts. A total of 70 subjects were selected through purposive sampling snowball method. A combination of qualitative and quantitative methods coefficient initial questionnaire and open interviews and ratings were used for data collection and analysis. The research instrument was a self-made check list in which respondents were asked to indicate the strengths, weaknesses, opportunities, and threats of the football List, while using geographic information system (GIS) to provide descriptive-analytic model, and part of the data in the software Arc - GIS was studied and analyzed. The overall result of this study showed that according to strategic land use planning of Iranian football, there is uneven distribution of sport places facilities and sport spaces for Iranian football. In addition, regarding the matrix positioning and strategic action, strategics approach of Iranian football is comparative. In order to balance the distribution of resources in the country, it seems that deep and creative special planning is needed to make balance in the factors affecting the Iranian football. On the order hand, it is essential to focus on the improvement of the synergy of sports activities of government and nongovernmental organization and private sectors which may ultimately lead to further success of Iranian football.

The question of reason and possibility of legal enforcement of morality rooted in fundamental concepts of public LAW, such as freedom and law, and the answer to this question have a great influence on determining the form and functions of the state. What is being discussed in this article is that, by contradiction between the morality and authority of the state, how should be the morality enforcement  and in other words, what is  the mechanisms of the morality enforcement in the Islamic Republic as a concrete example of the Islamic state? The answer to this question, in addition to the fact that it is possible to enter the state in the field of morality and the requirement for it, can be a base to the assessment of the validity of the state's morality enforcement, and to use these mechanisms in various subjects or to amend them. In this article, which is prepared by the method of library studying and analyzing the legal- juridical system of the Islamic Republic of Iran, after expressing the concept of morality and a brief examination of the principles of limiting the freedom of individuals by law, the laws and institutions of the Islamic Republic of Iran are analyzed. It can be said that prioritization of morality enforcement, such as the mechanism of the Islamic Republic's fundamental rights, the method of Appointment and supervising state agents, the establishment of special institutions for the promotion of morality, and public supervision have the priority that the morality enforcement of Judiciary. The use of force is the last level of the morality enforcement.

Prediction of the production rate of the cutting dimensional stone process is crucial, especially when chain saw machines are used. The cutting dimensional rock process is generally a complex issue with numerous effective factors including variable and unreliable conditions of the rocks and cutting machines. The Group Method of Data Handling (GMDH) type of neural network and Radial Basis Function (RBF) neural network, as two kinds of the soft computing method, are powerful tools for identifying and assessing the unpredicted and uncertain conditions. Hence, this work aims to develop prediction models for estimating the production rate of chain saw machines using the RBF neural network and GMDH type of neural network, and then to compare the results obtained from the developed models based on the performance indices including value account for, root mean square error, and coefficient of determination. For this purpose, the parameters of 98 laboratory tests on 7 carbonate rocks are accurately investigated, and the production rate of each test is measured. Some operational characteristics of the machines, i.e. arm angle, chain speed, and machine speed, and also the three important physical and mechanical characteristics including uniaxial compressive strength, Los Angeles abrasion test, and Schmidt hammer (Sch) are considered as the input data, and another operational characteristic of the machines, i.e. production rate, is considered as the output dataset. The results obtained prove that the developed GMDH model is able to provide highly promising results in order to predict the production rate of chain saw machines based on the performance indices.

This research aimed to investigate the effect of Quran recitation on the mental health among students studying medicine. The research applied a quasi-experimental method and pretest-posttest design with a control group. The population was the boy students of Kermanshah University of Medical Sciences and 30 students were selected by the convenience sampling as the sample. They were placed into the test and control groups (each group contained 15 students). The GeneralHealth Questionnaire (GHQ-28) was performed at two levels of pretest and posttest for both groups. The test group listened to the Quran recitation during 15 thirty-minute sessions after the pretest, then the posttest was done and the data were analyzed by the analysis of co-variance. The results demonstrated that the Quran recitation has a positive effect on the mental health of test group

The truth of religions and salvation of their followers is one of the religious-study thoughts which have been brought up in the Islamic world and in our country. Its advocates claim that all or a collection of religions are of truth and save-giving and they negate the restriction of right and salvation in a single religion. Dr. Soroush believes that all religions possess truth and are of the same righteousness and can transmit humanities to truth and salvation and bring about happiness and salvation. Referring to multi-layered being of truth, denying the absoluteness of knowledge, relativity of truth, expansion of the divine mercy and guidance and the limitedness of human perception, he insists his claim. By using the teachings of Imam ‘Ali (AS), such as possibility of certain knowledge, absoluteness of truth and negation the limitedness of human perception and mentioning the instance of the complete human, we prove the restriction of righteousness in the single religion.

The purpose of this study was to investigate the effect of Holy Quran recitation on the risk level of high school adolescents against high-risk behaviors. This research is a semi-experimental design with pretest-posttest design with control and experimental group. The statistical population included all male high school students (1st and 2nd years) in District 2 and 1 of Ardabil, and the sample consisted of 30 students who were selected through multistage cluster sampling among students who were studying Sampling was done. And randomly assigned into two groups (15 each) as the experimental group and the control group. First, the Iranian Adolescent Risk Risk Scale (IARS) was used as a pretest for both groups. Then, after completing the 12 sessions (30 minutes each session) for the experimental group, in order to assess the risk level of adolescents against high-risk behaviors (dependent variable), the Iranian Adolescent Risk Reduction Scale (IARS) was administered as a post-test in both groups in order to evaluate the effect of auditory recitation of the Quran (independent variable) in the experimental group. In this research, data were analyzed using covariance analysis and SPSS version 20 software. The results of this study showed that the effect of quran recitation as an independent variable on adolescents' risk of being as a dependent variable was significant and the risk level in the experimental group was significantly lower than the control group.