درخت حوزه‌های تخصصی

This study aims to investigate the correlation between the diversification and accruals quality (AQ) in Iran’s mutual funds considering two main hypotheses and four sub-hypotheses. This research investigates the effects of cases such as beta of the company, the company's return on assets, debt ratio of company, firm's size, and accrual quality on the company's cost of capital and considers the effect of mutual funds’ diversification on decreasing information risk calculated through accruals quality in Tehran Stock Exchange (TSE) and Iran Farabourse listed companies. This research investigates 42 mutual funds from 2009 to 2013. Furthermore, the financial data of companies is considered for 20 years up to 2013 in order to calculate the accruals quality. The research results indicate that the factors such as the company's beta, the company's return on assets, and the ratio of firm's debt have direct correlation with cost of capital and this indicates that the increased risk in the form of beta and debt ratio increases the investors' expected return. However, the firm's size is inversely correlated with the cost of capital indicating that the increased firm's size provides the possibility of borrowing and bargaining at lower costs for companies. Furthermore, diversification in mutual funds results in lowering information risk caused by low accrual quality. Accordingly, the result of this research can help the mutual funds’ managers and investment companies to better manage their investments

The purpose of this paper is to analyze the relationship between default risk and momentum effect using data from companies listed on Tehran Stock Exchange.To calculate default risk,we used Black-Scholes-Merton (BSM) option pricing model. To describe momentum effect, by determining the formation period to be 6 months, and the holding period to be 3,6, or 12 months, we firstlyexamined the profitability of short term (3/6), midterm (6/6), and long term (12/6) momentum strategies and found that during 2010-2015 time period, only midterm momentum strategy is profitable.Then,we showedthere is no relationship between default risk andmomentum effect.

Introduction Designed according to the principles of the Iranian Islamic architecture in the world do not have many samples. Western culture influenced modern architecture and has little respect to the culture and customs of Iranians. Be careful in places design like airports is very important in a place that a large number of passengers every day. This research is a descriptive study and information gathering tool has been library tool and Tried to influence elements of Islamic-Iranian architecture in the design of an airport. In today's world in which the technology speaks first prior to everything, the shortage of time and the need for speeding works is clear for everyone. It must be accepted that the need for a high speed in transportation category can be important and discussible more than anything. Regarding the airplane as the fastest vehicle in today's world leads us to the space for accessing the airplane, i.e. the airport. irport terminals are buildings, which were considered as main arrivals and departures gates of the cities. And its main users are temporary and the building serves them as a pathway. This space is a perfect platform for the creation of a permanent mental and memorable space at the beginning of an entrance to a city or a country. In addition to the important issue of the performance in airport designing, paying attention to the combination between space, form, structure and light in this building plays an important role in designing. Regarding the optimum consumption of the energy and strategies for the sake of reducing greenhouse gases and supplying the complex energy by itself and regarding the modern technology, it is necessary to definitely equip an advanced airport complex to smart materials. Therefore, regarding the mentioned items, an architect can provide convenience for passengers with proper designing and easily guide them to their objectives. Airports are a collection of different plants and equipment has been made to provide facilities for handling and air transport. As maritime transport requires port, the airport can also be likened to the air port that is required for air transportation. In places such as airports, that all passengers must be attend at least an hour early, and in many cases different reasons caused delays for passengers, it is essential to reduce psychological pressure work with a variety of solutions(Factors and solutions to improve). In an airport environment, many factors can be taken into account that can be suitable environment, away from stress and mental tension designed. In an airport environment, many factors can be considered with the help of those factors; it can be suitable environment away from stress and mental tension designed. Passengers expect a comfortable and charming terminal facilities and the behavior be effective, acceptable and done without wasting time. For this reason, the design of passenger terminal must be functional and beautiful architecture. Iranian architecture has architectural features that in compare with other countries has particular value: features such as proportional design, accurate calculations, the correct form of coverage, compliance with technical and scientific issues in the building, high balconies, tall columns and the various decorations that each of which in simplicity represents the magnificent architecture of this land . Ecological, ethnic and cultural type causes of human construction are very diverse in the area of housing and other buildings in our country. Discussion and Conclusion The use of different materials, different styles, very much functions of a building that still remains in our country many old houses. It seems knowing what we have in the past and recognize the principles and standards of our traditional architecture and give them a body language, pave the way to achieve what is intended, and it is the responsibility of individual architects to refer to original sources and valuable examples. The pri