درخت حوزه‌های تخصصی

The conclusion of any contract aims at implementation of the obligations arising from it. Morality dictates that people adhere to what they assumed regarding others. The law also supported the moral judgment and in case of breach of obligations to oblige, compensation as a sanction is imposed on obligor. In view of the economic analysis, he also committed to respect his contract and the Contract shall be performed contrary to the intention of breaching party, and on both sides the effectiveness is motivated to build trust and to maximize contract efficiency. Typically there are two basic solutions in compensation for breach of contract. First, the obligation of obligator to perform obligation, secondly, payment of damages for non-performance, either by the parties in the form of penalty clause or by the court to refer the matter to the expert identified and they are required to pay it. In choosing one of these, economic perspective considers the economic benefits of each of these two solutions. If so economic benefit in cases where subjective commitment and intellectual damage on the implementation of the commitment, as compensation for these losses not compensated correctly, and basically cannot be estimated. In second view, sentence in view of the compensation usually refers to material damages or economic damages, in such cases compensation for losses caused to the obligee can be compensated better and more efficient method is considered. Finally, it must be borne in mind that the purpose of signing the contract because is its implementation and in cases where the performance of contractual obligations under changed circumstances faced hardships, the elimination of obstacles to the implementation of the contract will be resolved, it seems to modify the contract as a mechanism for the implementation of the contract must be considered unless they agreed to be imposed on them by law or judicial authority. In this case, unless the modification is done by mutual consent, it is modification by legal and judicial means economically, we'll see how the parties to the agreement have wanted to do risk allocation or choose the more efficient ones, that is, which party can a lower cost can bear the risk of changing circumstances and consider same party responsible for it.

The bus system in a high-speed public transportation systems are equipped with modern technology that due to accuracy, speed and flexibility have been considered as one of the improvement solutions in Tehran's public transport system. In this article the performance of BRT line three of Tehran has been evaluated based on the established standard in 2013, developed by the Institute for Development Policy and Public Transportation (ITDP) through the rankings and SWOT models. Research method of the present article is comparative and descriptive - analytical. Our results show that BRT line three in Tehran with total score 50 has the basic rank and close to bronze according to international standards. After introducing the evaluation model for BRT system and factors affecting the system, strategies to promote the quality and quantity of BRT line three have been presented.

Like other economic markets, housing market is comprised of supply and demand dimensions and equality of supply and demand makes the housing market balanced. The aim of this paper is to investigate the characteristics of housing market of Tehran city and some deficiencies of this market with fundamental – applied methodology. The variable studied here is the saleable residential unit with minimum 50m2 area which is obtained after statistical evaluations of housing price for many years and estimation of the loans and deposit of families in different income levels. Results reveal that problems of housing market can be attributed to lack of appropriate planning in housing building and supply (in quantity, area and geographic location), decreasing purchasing power of people various income levels as a result of misfit of increase in income and price of housing, low demand of families and finally, limited income groups for purchasing appropriate housing.

Learning is a new paradigm that is introduced in today's organizations. The purpose of this study is to determine learning contingency model from the mistakes using TOPSIS. Variables were identified using the Delphi technique. The samples of this study were consisted 30 public administrators in Iran. The results show which factors have the greatest impact and which causes the least impact on learning from mistakes in public sector of Iran.

This paper sought to evaluate cultivation social and economic of Atriplex lentifomis in Golestan rangelands (case study: Chapar Quymeh and Baharmeydan). the present research is conducted in a survey, descriptive and explanatory manner (hypothesis testing) in which field and library researches were used. research population is a number of ranchers in plan region of Chapar Quymeh (93 people) and a number of ranchers in plan region of Baharmeydan (37 people), research sample size for Chapar Quymeh and Baharmeydan was estimated to be 75 and 37 stakeholders according to Krejcie and Morgan formula. Sampling was carried out in systematic random way and tools used in research include researcher made 25-item inventory with Likert scale. The results of factor analysis test and ranking social and economic indices showed that factors affecting Atriplex cultivation in Baharmeydan area are as follow: production, income and capital, entrepreneurship, social welfare, recreational value, hygiene, sense of belonging to place, institution and education respectively. As for Chapar Quymeh this prioritization is: production, income and capital, entrepreneurship, institutional, social welfare, sense of belonging to place, recreational value, hygiene and education. Using one-sample T test, it was found that the outcomes of social and economic indices affected by bush planting are positive in study areas

The most important characteristic of dome and factors influencing it in the Islamic Iranian architecture that is different from other courses is construction and construction methods of them. Over time, different factors are involved in the process of formation of the domes. It is one of the factors influencing the structure of Iranian-Islamic domes. By examining the structure of Iranian-Islamic domes form can be read part of forgotten knowledge of architectural past among architects. This paper aimed to analyze the impact of changes on aspects of the architecture of dome. Other researchers on the review of the reports for reviewing and rethinking dome shows the analysis so far mainly structured approach to the process of the formation of the dome is recognized in Islamic Iranian architecture. Other researchers on the review of the reports for reviewing and rethinking dome shows the analysis so far mainly with structural approach recognized the process of the formation of the dome in Islamic Iranian architecture. Analysis result show there is a clear distinctive relation between the dome and the size, height, form, shape and overall structure. This article is collection of library documents on the one hand and filed documents on the other hand. In this study, after the study of the certain structure of elements and measurement, sensitive and form relationships and relationship between components will be examined. The study aimed to investigate the relationship between Islamic Iranian architecture and architectural structure of the dome. The investigation carried out revealed that resizing dome plans structure directly depend on form and method of making them.