روح الله طاهرخانی

Composite indicators are the collection of a group of sub-indicators to measure multidimensional principles that can't be measured by one indicator. Utilizing Composite Indicators (CIS) as like beneficial tools to assess overall performance of transportation safety analysis has extended of recent times. Amongst many models, the Data Envelopment Analysis Model (DEA) is these days an essential tool of constructing CIs amongst different performance methodologies these days. But DEA assumes that all data are specific or quantitative values to be used in basic DEA-based CI models. However, in some problems, the observed values of input and output data are sometimes imprecise or fuzzy statistics due to there are many variables in the road safety that follows natural ambiguity and often there ​​are imprecise values, which can only be represented by qualitative data. In this study, we studied two methods within the DEA framework for modeling quantitative and qualitative data within the context of constructing composite indicators. There are Imprecise DEA (IDEA) and Fuzzy DEA (FDEA) models respectively. Based on their principle, new models of IDEA-CIs and FDEA- CIs are obtained in the assessment of road safety management via developing a composite indicator of road safety for 30 countries round the world. Comparing the results are obtained from the two models with the primary data confirms the efficiency and reliability of the two models. In the end, targets were calculated for inefficient countries then Benchmarks were set and road safety strategies were prioritized for them.

Climate change is one of the most important problems of the planet. Buildings, relying on non-renewable energy sources, account for 40% of the total energy consumed worldwide and 30% of the total carbon dioxide emissions. The construction sector in Iran accounts for 33.8% of energy consumption, among which the energy consumption in Iran's educational buildings is 2.5 times that of developed countries. Renovation of existing buildings helps to reduce energy consumption and carbon dioxide emissions globally. In this research, the optimal reconstruction of an educational building located in Tehran was investigated using passive measures. In order to minimize the load of cooling, heating and the initial investment of the building for the current and future climate, the genetic algorithm with non-globe sorting was used in the jEPlus environment. In the optimization of the mentioned building, various options such as parameters related to the building cover, such as the type of insulation and its thickness and the type of glass used in the windows were considered and finally solar panels in order to reach the building with zero net energy. used. The passive option selected considering the current climate causes an 11.83% reduction in annual gas consumption due to heating and considering the climate of the decade 2080 causes a reduction of more than 1.15% in annual energy consumption due to cooling and a 40.4% reduction in consumption Annual gas emissions from heating and a 4.84% increase in cooling energy compared to the base model. The results show that the current optimal building cannot remain optimally in the future.

Public-Private Partnership is a mechanism in which the public sector uses the capacity of the private sector to provide infrastructure services. Due to the economic and political conditions of governments, moving towards using the capacities of the private sector has become more necessary than ever. In this regard, examining the main obstacles to success in private and government partnership projects has been one of the main management issues in recent years. The purpose of this study is to investigate the main barriers to success in private and public sector participatory projects and a case study of Zanjan Provincial Deputy for Civil Engineering projects. In this research, which is an applied research, an attempt has been made to determine the main barriers to success in collaborative projects using quantitative methods and questionnaires. For this purpose, based on the four components of PEST analysis (political, economic, cultural and technical), the identified factors were classified and a questionnaire was formed. Demetel technique was used to analyze the collected questionnaires and the questionnaire was distributed using Cochran's formula among the statistical population. The results of the analysis of the questionnaires show the impact of all four main political, economic, cultural and technical components on the participation process. Among these, the criterion of political components with a normal weight of 0.180 is in the first priority. Economic criteria with normal weight of 0.162, technical criteria with normal weight of 0.087 and social criteria with normal weight of 0.066 have the following priorities, respectively.

The vital infrastructure forms the foundation of any society. And the everyday life of humans depends to agreat extent on the operation of this infrastructure, and more interestingly, the infrastructure itself is dependenton one another for continuing to operate. Consider, for example, the infrastructure of water. How can itcontinue to operate without electricity infrastructure? The purpose of this paper is to analyze the attractivenessof water supply infrastructure, which is based on game theory. The theory of game theory is a mathematical approachthat was first introduced in the field of economics and then entered other disciplines. The water networkis always targeted at all major wars and hostilities as a fundamental basis. Considering the strategies of attackand resilience for the two countries, modeling of scenarios was done using the theory of games. After calculations,it was determined that among all the components of the water supply network of the refinery is of greatimportance. It was also determined that the theory of game theory is an effective method in the analysis of infrastructureand can be achieved with the desired results.

In recent years, the construction industry has had a great impact on social, economic and environmental issues, so one of the current goals of the construction industry is to reduce the negative impact on the components of sustainable development, including social, economy and environmental . Due to the increasing problems in the field of construction in the world, sustainable systems and sustainable development are among the policy priorities of developing countries, including Iran. Due to the current problems in the construction industry, Iran needs to implement solutions to solve the problems in the field of reconstruction of residential buildings with regard to sustainable development policies. Sustainable development consideration in reconstruction is not a new issue in the world, but it need to establish new policies depend on its widespread use in Iran. The reconstruction process can be considered as a capacity in sustainable development factors implementation. Eventually there will be a traditional building based on sustainable development factors. . In this research, while introducing the issue of sustainable development, the benefits and necessity of its importance and the social dimension of renovation are briefly reviewed. The social sustainability dimension factors is presented and classified

Private sector participation, especially in the urban economy and municipal projects, plays a vital role in the development of communities. Undoubtedly, the first step in developing private sector participation in urban management projects is to identify the reasons for reluctance and remove existing barriers to the sector's participation in urban projects. In this regard, the purpose of this study is to identify and evaluate the barriers affecting the non-participation of private companies in investment management projects in Alborz province. The present research is applied research in terms of purpose and descriptive-survey research in terms of method and nature. The method of data collection is based on library studies and field studies, including a researcher-made questionnaire and interviews. The findings of this study indicate that the effective barriers to non-participation of private companies in urban management projects in Alborz province are barriers related to economic, political, legal, social, technical and environmental factors, respectively. Economic factor by preventing fluctuations in inflation and interest rates and foreign exchange market, as the most effective and environmental factor by preventing natural risks including risks related to the climate and climate of the project site, internal and external environmental conditions of the project and force majeure, were identified as the least effective factors.

Today, the construction industry has become one of the mother industries, which forms a wide range of related industries. Rapid changes in the construction environment require different efforts for a company or organization to survive and grow, and their life depends on how they manage their projects correctly. The success of construction projects is one of the main goals of project managers. One of the ways to evaluate and control project success is to apply project performance management. According to the existing conditions, companies and organizations recognize the importance of performance evaluation to improve their competitiveness. Therefore, in this research, by reviewing and reviewing the research literature related to project performance evaluation, the most key indicators of performance measurement have been identified and presented. According to the calculations and investigations, the most important key indicators are: safety, cost, quality, schedule, productivity, customer satisfaction, profitability, team satisfaction, environment and sustainability. Also, considering that construction projects are always progressing and becoming more complex and have many linear and non-linear relationships and structures, these projects can be considered a type of dynamic systems. Studies show that the correct use of the system dynamics method in this field have a great impact on the success and improvement of the performance of construction projects.