Abstract\n\nA pressure control valve of a spray-multipoint system (diaphragm) belonging to an injection engine (1600cc) to adjust fuel pressure has been considered. This valve is installed at the tail of the fuel manifold to control the fuel pressure with using Electrical Motor System (EMS). In this investigation, the performance of valve has been explained as well as mathematical equations. Subsequently, vibrative model of diaphragm and its free vibration are analyzed in continuance. Element Free Galerkin (EFG) method and ANSYS software have been used in order to analyze natural frequency diaphragm. EFG method utilizes moving least squares (MLS) approximately to make shape functions based on a set of nodes scattered in the problem domain. The dynamic equations of the system are formulated by using the Lagrangian equations. The main boundary conditions are imposed through using their weak forms with Lagrange multipliers. Orthogonal transmission technique is used to implement the main boundary conditions in the eigenvalue equations. The present EFG method is coded in FORTRAN. Moreover, dimensionless fundamental frequency of vibrative model related to valve diaphragm which has complicated shape has been obtained through several types of difficult boundary conditions and using two aforementioned methods. Very appropriate agreements have been acquired by comparing the gained results.

Superconductors provide the possibility for a very sensitive generation of disclosures in magnetic field by which magnetic felids generated of brain waves could be specified. These disclosures which are called Superconducting quantum interference devices are the pieces using the properties of superconducting quantum. The main index in these pieces involves Tunnel barriers with a Series of layered nano-structured materials made of superconductor, insulator and another superconductor. On the basis of evaluating the role of triple superconductor to explore the modern generation of current limiters, it has to be stated that since early 70s decade, the studies to reduce the short circuit level of power grid have been emerged as one of the main research issues by which researchers have paid attention on equipments and methods in order to limit the amplitude of fault current. The present paper is conducted to peruse triple superconductor role to explore the modern generation of current limiters.

From the very beginning of Carbon Nanotubes emergence, researchers have paid a particular attention on these new carbon composites which finding about the characteristics and potential applications of these composites is considered by them the most. In the other side, discovery of superconductivity in C_60, K_52 and C_60 A_3 composites and also in Carbon Nanotubes is paid attention by researchers. Researchers look out from several aspects to the issue of Nanotechnology. Through this, Making superconducting materials with Nano dimensions on one hand and utilizing Nanostructure materials in superconductors to improve superconducting characteristics on the other hand and another more important issue of superconductivity in Nanostructure materials are very important in this relation. The present paper is conducted to assess the role of Carbon Nanotubes in improving Performance of Single Superconductors; for this the theory of superconductivity of Carbon Nanotubes and also adjusting Carbon Nanotubes (CNTs) in improving the function of 〖Mg B〗_2 superconductor is considered.

Many factors are essential in stock Investment. One of the essential parameters mentioned as an important index in Analysis of Companies is the issue of “profitability”. A particular attention was paid on Changes in profit associated to companies by investors and stockholders. Investors have a tendency toward investment in stocks of companies with fast increase in the profits. In present paper, an observation about “Effect of indices associated to corporate profitability on investors’ decisions of Tehran stock exchange” has been provided. Independent variables include liquidity, ratio of Long-term debt to Equity (Total Debt / Total Equity), Sales Growth, Average stock price, and gross domestic product (GDP); also, dependant variables include on investors’ decisions of Tehran stock exchange. To collect data, library and field methods have been used. For the purpose of data collection, Questionnaires were distributed among 130 investors in Tehran stock exchange, and then according to data collection, observation about hypotheses of research and also data analysis were done through descriptive and inferential statistics. Data gathered via Questionnaire were analyzed via SPSS software.

Capital market paves the way for developing and creating job and improving level of welfare by directing capitals and savings of people. Economic growth and welfare improvement cannot be achieved in long term without considering investing and main factors existing in the environment. This paper evaluates factors affecting transactors` and managers` decision making for investing. Independent variables include dividend per share (DPS), yield, price trend, market status, consulting and recommendations of brokers, and perceived risk which is considered as features of capitalists. Also, dependent variable contains transactors` and managers` decision making. Statistical population includes all capitalists referred to hall of the Tehran Stock Exchange in 2012. The sample is simply randomized. Data is collected through library and field methods by distributing questionnaires among 130 stock capitalists. Then, the research hypothesis is examined and analyzed using descriptive and inferential statistics with respect to collected data. Finally, the obtained results from distributed questionnaires are analyzed using SPSS software. The results show that capitalists do not rely on the financial statements and financial ratios and the accounting system as a whole, in return, they consider the more tangible criteria such as price trend and market status.

This paper sets out the reasons for accepting Total Quality Management (TQM) by the managers of\nphysical education organization of Fars province. Approach / Methodology – this is a descriptive correlation – based\npaper. The sample Includes 90 managers, assistants and deputy chairman of physical education offices of Fars\nprovince. The instrument used in this paper is the Spinwal’s (1994) standard questionnaire. The reliability\ncoefficient (Cronbach’s α) of this study is about