درخت حوزه‌های تخصصی

on one hand, Iran due to the low annual rainfall and lack of appropriate spatial and temporal distribution in precipitation is considered as an arid and semi-arid country experiencing stress and water scarcity; on the other hand, 90% of annual water consumption has been allocated to agriculture sector in Iran and efficiency and productivity of water consumption do not enjoy favorable status in this sector. While it can overcome this problem by use of virtual water criterion in trade with the countries which enjoy water status such as Turkey. In this regards, the present study has examined this issue in form of selected agriculture goods based on common indices for detection of trade opportunities. Cosine criterion indicated that the degree of similarity and complementary of Turkey’s export with Iran is greater than structural similarity of Iran’s export with Turkey. With regard to trade potential calculations, Iran and Turkey have high export capacity in trade of agriculture goods. Further, Index of Drysdale indicated that the possibility for development of trade from Turkey to Iran is greater than trade from Iran to Turkey and ultimately adjustment of Balasa index based on virtual water trade process indicated that Iran should change its import and export priorities at area of agriculture products. Further, results from research indicate that applying virtual water criterion and removing the products lacking relative advantage in trade between Iran and Turkey result in increase in export of Turkey’s agricultural products to Iran and increase in Iran’s benefit in trade of virtual water.

In this paper, an economic decisions-making model based on mathematics in order to optimize the costs of investment in accordance with innovative technology of human resources recruitment introduced and in the next section, the economic impact of the Internet recruitment technologies has been examined. In order to fulfill these demands classic economic order quantity model of have developed as cover unique cost of recruiting activities such as human resource management and coordination related to it. Therefore, using this method calculated the required minimum of recruitment level and consequently optimal investment in online recruitment technology has been resulted. The findings suggest that optimal investment costs near the minimum level of recruitment is rapidly increasing but the stunning developments in efficient technologies in recruitment system and lack of awareness of this minimum level of employment has caused total number of employees is more than the required minimum level. In this article, how to use this model in a research sample of online recruitment websites in Iran entitled “Iran recruitment” its potential as a tool for decision-making in the field of optimal investment for managers appeared.

No unique method has been so far specified for determining the number of neurons in hidden layers of Multi-Layer Perceptron (MLP) neural networks used for prediction. The present research is intended to optimize the number of neurons using two meta-heuristic procedures namely genetic and hill climbing algorithms. The data used in the present research for prediction are consumption data of water subscribers in Fasa City of Fars Province (Iran) between the years 2010 to 2013. Ultimately, using the respective data set, the data of the subsequent year 2014 can be predicted. In the present research it was observed that the mean square errors of per data (MSEPD) for the abovementioned algorithms are less than 0.2, indicating a high performance in the neural networks’ prediction. Correlation coefficients using genetic and hill climbing algorithms were respectively equal to 0.891 and 0.759. Thus, GA was able to leave a better effect on optimization of neural network.

Primary man in trying to find food went everywhere. But by forming ranching arranged a chain of places and became emigrant. By happening industrial revolution, human life was centralized on one place. Places that base on its advantages make different biologic and behavioral types. Forming cities in seaboard, river shore, boundary of mountains and Champaign cause to make different cultures that shows habitat and continent effects on their inhabitants. This definition of human means native man was removing in industrial revolution because modern life advantages aren't depended on habitat. Loom factories develop in every longitude and latitude and cause to form cities that have sit on beds without native values. In fact dependency on a special place in agriculture ages lost its special value and come off in everywhere. In the other hand, in information and media revolution of globalization life Advantages Sea themselves in communication and virtual space that is quite placeless. In fact if we define habitat as an interacting situation between human and a place, we can survey this concept evolution and change procedure from past to now and study its results and effects on human life space quality. In this study we survey efficacy on and getting effect of habitat by studying cultural and anthropologic evolution and genesis of habitat concept and restudy its relation with human real and virtual residential space.

The Internet along with many advantages has some disadvantages, and the lack of a complete understanding of cyberspace can cause damage in terms of mate selection method. This article attempts to address some of the disadvantages and threats that virtual spaces create in mate selection method and tries to introduce some strategies to prevent and reduce these emerging injuries. This study was conducted using a questionnaire survey and the reference method. The population of this research is all youth between 20 to 34 years old who live in Jahrom in 1395. The sampling methods used here is the cluster sampling method. The sample size has been calculated by the Cochran formula, and 320 people were selected. The questionnaire was 0.77 alpha general questionnaire and statistical analysis was performed by SPSS software in the form of analyzing the correlation coefficient and regression. In this research, after describing the stages of major indicators of family position as the most important unit of society, and after declaring the ideas about mate selection and cyberspace relationships, and mentioning them as opportunities and threats, emerging injuries following by cyberspace relationships and their influence on the mate selection methods are discussed. In this study, family attachment, traditional values and the level of religiosity are effective in young people attitudes to cyberspace mate selection, as well as effective variables have an impact on mate selection method with a coefficient of 0.611% were able to predict changes. In other words, effective independent variables have been able to define 0.611% of changes in mate selection methods, and the rest of the effects are due to some variables that are not included in this study.

Today country success in economic, social, political , cultural and tendencies are the hostages and pawns of coherent and dynamic didactic system and approved; The education and didactic programs for qualification improvement and dynamism need to evaluate and scrutiny quantitatively and qualitatively. Current study started with the goal of presenting faculty competency evaluation for the reason of qualitative improvement of Islamic Azad University. Research in term of how to collect and compilation the data is descriptive- survey and in term of goal and target type is practical that by doing general scrutiny in literature and subject history and past, we drawled the theoretical frame and conceptual model in this study. Nominee educational members opinions (faculty members (self- assessment), supervisors (superiors), students (clients) of Fars stat Islamic Azad different universities, are the research society. In this research with researcher evaluation in 24 active units in Fars state, approximately 125000 persons examined. That sample volume selected by the clustered random sampling method (kerjesi and Morgan formula), 380 persons, for the reason of collecting dates we used a researcher questionnaire that its validity confirmed by the specialists and its stability calculated by using the Kronbakh’s Alfa method 0.84.Researche questionnaire includes effective component in competency in five general axis, collects the data. Then with using 360 degree evaluation method, executed. For the data analysis me used descriptive statistic method and elicitation statistic (fact oral analysis, vilkakson and Friedman) that the results of the study as follows: 1.drawing the model of competency evaluation of faculty (main dimension of evaluation indexes of faculty competency’s).2.in the field of evaluation of current situation from the dimensions and competence skill parameters, ethical values, role, personal, favorable status exists. But in the performance and functional dimension and its subcomponents unfavorable status and lower than average level evaluated and the results of ranking of evaluation of dimensions of competency’s of faculty in order the most priority is related to skill dimension and the least priority is related functional and performance dimension.

Current article is allocated to the report of a research in which the income elasticities of urban families” demand for public education in time period of 2008-2013 were estimated separately according to the income deciles and by applying Rotterdam Demand System, it was clarified that public education is normal commodity. Different size of estimative elasticities indicated that public education is necessary for the families belonged to the sixth and tenth income deciles and it is lux for first to fifth income deciles and it can be expected that if the income of families belonged to the first to fifth deciles faces with reduction, mentioned families for one percent reduction of income will reduce their demand for public education more than one percent and they will consume the related sources for necessary commodities and services. In contrast, the families belonged to the sixth to tenth deciles reduce the share of lux commodities and services in their cost basket so that not to be forced to reduce their public education costs proportional with income reduction. Therefore, the effective policies on families” income should be compiled and executed in a manner that not to cause to reduce the demand of families for education and especially groups with low and medium income.

The how and why of Tehran development and construction of its Citadel has always been of interest to researchers. At the same time, Issues such as its time of obtaining importance and prosperity on the one hand, and establishing and appellation of its Citadel as the most important official complex of the Qajar period on the other, are among the concerns mostly ignored by the scholars. Addressing the above- raised questions, the present study has been analyzing the development time of the city as well as construction and name of its Citadel by checking reliable historical references and also scrutinizing the related assumptions regarding them.