دکتر مرتضی شفیعی

The sharp decrease in rainfall has reached the peak of drought conditions in Fars province, so that the discharge of all rivers in Fars province has decreased between 70 to 100 percent, and due to the limitation of renewable water resources, there is a need for optimal and sustainable use of existing water resources. All reservoirs of dams in Fars province are necessary.

The main purpose and methodology of this research is to design a mathematical planning model for the optimal allocation of water resources of selected dams in Fars province, in order to net advantage of the system on the planning horizon that issues such as time period, reliability level, course currents, number of dams and consider some scenarios. Accordingly, the objective function of the model seeks the maximum advantage obtained for dams based on the parameters set with three indices of scenario, dam and time period.

At first, this model was considered for 5 users (dams) with 4 different scenarios in 10 monthly time periods, in which case the value of the objective function reached 39863110. Then, in order to analyze the sensitivity of the results and show the change of the optimal answer depending on the dimensions of the problem, the model was implemented for 10 users (dams) with 8 different scenarios in 20 monthly time periods in which the value of the objective function reached 82944240. Therefore, with the increase of the dimensions of the problem, a significant increase in the amount of the objective function and the optimal allocation of water resources of the selected centuries occurs in Fars province. Therefore, due to water shortages and recent droughts in Fars province, it is necessary to pay attention to sustainable and equitable development in planning the allocation of water resources and taking into account various indicators simultaneously.

The present study aims to identify the cultural strategies of the ecotourism centers of Mazandaran province with an approach based on thematic analysis. This study is practical based on the purpose. The qualitative research approach and the statistical population included 137 narratives related to cultural strategies of Mazandaran province ecotourism centers in online social media. One hundred thirteen narratives were analyzed with the help of theoretical saturation and judgmental sampling. Narratives were manually coded by searching tourism websites and using a three-step open, central, and selective method, and then based on the SWOT method; different points were combined and shown in the form of a network of topics. The results indicate the identification of 10 organizing themes and 75 basic themes regarding the cultural strategies of the eco-tourism centers of Mazandaran province as comprehensive themes. Also, the results show that the cultural strategies of Mazandaran eco-tourism centers include a learning culture strategy, e-learning culture strategy, technology application culture strategy, creative tourism culture strategy, food tourism culture strategy, green culture strategy, social-cultural strategy, artistic, cultural strategy, economic, cultural strategy, and cultural marketing strategy.

There is a growing concern about the social and environmental impact of the food supply chain, and the food industry faces numerous challenges. This has created significant pressure from various stakeholders to enhance the sustainable performance of the life cycle of perishable products. In this study, we aim to assess the sustainability of the supply chain for perishable products in the food industry. After examining both external and internal factors and identifying a research gap, the structure of the present study involves a four-stage supply chain. Input and output variables were selected based on perishable products and the three dimensions of sustainability. To achieve this goal, we conducted field and library studies to identify and extract relevant input, output, and intermediary indicators for evaluating the relative efficiency of supply chains in various sectors. Subsequently, we examined the supply chain's efficiency and ranked the efficient units. Given the primary focus on perishable materials, our study involved 18 dairy and meat factories in Fars province as the statistical population. We utilized WinQSB software to analyze network downtime and to model and solve the data. The results highlight that the most significant challenges faced by the companies are in the supply sector. Based on these findings, we provide recommendations for companies to enhance their performance.

Television and satellite channels, in addition to other forms of social media, have facilitated the rapid and widespread transmission of foreign lifestyles, social relationships, culture, art, beliefs, and values to Iranian society. As a result, satellite networks with their diverse capabilities have become capable of affecting all aspects of human life, particularly altering the daily lives and lifestyle choices of people from all sectors of society, particularly the youth. Thus, the aim of this study is to evaluate the effectiveness of Persian-language satellite networks in shaping the lifestyles of young people and from the perspective of Bourdieu's indicators by means of the data envelopment analysis model.

The research method employed is case-driven and context-specific. In order to implement the model, a library study was initially conducted to evaluate the impact of TV and satellite networks on youth lifestyles according to Bourdieu's perspective. Based on the opinions of experts in the field, the input and output indices of the study were determined. To account for the non-deterministic nature of many indices, the Rough DEA model was used, which converts non-deterministic variables to intervals using the "α" level and results in an interval data envelopment analysis model. Using the MRA ranking method, the efficient intervals were ranked and compared. Then the efficiency of each evaluated network was determined through a sensitivity analysis performed at different "α" levels. Finally, each of the networks was ranked.

Based on the data collected and analyzed, the "Man o To" network was found to have the greatest influence on the lifestyles of young people. The "Persian BBC" network ranked second, followed by the "Nasim network" in third place, and finally, the "GEM" network placed last. These results suggest that there are significant differences in the impact of satellite networks on the lifestyles of young people, and that the "Man o To" network has been the most effective at shaping the lifestyle choices of this demographic.

Based on the research findings, it is recommended that the administrators of domestic Persian-language satellite media produce high-quality and appealing content in the fields of information, news, entertainment, and educational programming. This strategy will help boost the lifestyle indicators among the youth. Additionally, it is suggested that individuals with greater social capital and trust consume media resources from these aforementioned fields.

It is not possible to implement comprehensive programs in the field of crisis management without the conscious participation of citizens, and it is necessary to plan with institutional capacity building and their empowerment in crises. In this regard, Tehran Municipality has started a popular and voluntary organization in the neighborhood house with the title of Durability and Safety House, so the purpose of this research is to provide a mathematical model to evaluate the performance of these Durability and Safety Houses affiliated with Tehran Municipality in order to promote community-oriented participation of citizens in crises.

The research method used in this research is applied in nature and its method is contextual-case. Also, a combination of two field and library methods has been used to collect data. In line with data analysis, the mathematical model of Rough Data Envelopment analysis has been used. Also, the statistical population of this research, in terms of examining the efficiency of durable and safe houses, includes 22 durable and safe houses, and in terms of determining the effective indicators in their selection, it includes 55 experts in crisis matters, and due to the limited nature of the society, all members of the society were considered as a statistical sample.

The findings indicate that among the 22 durability and safety houses investigated, 11 areas are efficient and the rest are ineffective.

Considering the central role of durability and safety houses and the participation of citizens in preventing the occurrence of crises, the need to stabilize and measure their performance and efficiency is of great importance. In this regard, it is necessary for the municipalities to cooperate as much as possible with the citizens and formulate coherent plans and implement them in durable and safe houses in order to reduce the scope of the crisis during and after it occurs.

Our country is one of the most vulnerable countries in terms of suffering natural disasters in such a way that during the 20th century, the statistics of human and material losses resulting from incidents have placed Iran among the top ten countries in the world in terms of disaster and vulnerability; on the other hand, considering the role of the media in the representation era or the age of media in shaping our understanding and imagination of disasters in today's world, one of the important dimensions of disasters is to know how visual, audio and virtual media work during a disaster. Therefore, without knowing the performance of the mass media, we cannot practically know many aspects of the disasters and society's response to it at the national and international level. The media not only informs, encourages and persuades the society to provide relief and mobilize facilities when a disaster occurs but also they are very effective in the renewal and revival of the society and the changes that occur in the beliefs, behaviors and lifestyles of the members of the society before, during and after it.

In this research, it has been tried to determine the prioritization and effect of Persian language satellite and television networks on the lifestyle after the Corona crisis with a mathematical model of rough data envelopment analysis. This research is an applied study and its method is case-based and in order to measure the before mentioned Channels, field and library studies were conducted on the variables and indicators of lifestyle after Corona, at first; and after reviewing the articles, in order to calculate the research indicators, a guided interview was conducted with experts in this field who had at least 10 years of experience in the fields of lifestyle, media and culture.

The findings of this research indicate that MANOTO Channel has had the greatest impact on the people's lifestyles after the Corona disaster and after that the NASIM and GEM channel are in the second and third places.

According to the ranking of the channels, it is important that the lack of actions of the domestic channels, such as lack of quick, accurate and clear information and concealment of facts and statistics, gives the opportunity to the satellite channels and reduces their social capitals; on the other hand, in the case of producing high-quality programs that suit the audience's taste, such as entertainment and family programs in NASIM channel provides the possibility of competition and influence for domestic channels.

Road transport in the country with more than 90% of the transportation share is the most important transportation sector. The main objective of this paper is to estimate the number and distribution of inter-city road freight fleet and its optimal distribution in the provinces of Fars and Khuzestan, which has had a larger share in the transportation of the country. First, there was a general discussion of the problem and the importance of estimating the number and distribution of freight fleet, and then, by examining past studies, demand for transportation and demand estimation patterns were explained, and a multivariate decision making model with multi-objective integer programming approach was used to solve the problem. The problem model is composed of two objective functions, which minimizes the total cost of the system to the first objective function. These costs consist of two fixed and variable costs, which are set up costs and linear costs of sending products from distribution centers to customers, and in the second objective function, the total amount of time the products are sent from the distribution centers to customers is minimized. The required data were collected into the problem model and the model was implemented using Gams software. It was determined that for the two research provinces (Fars and Khuzestan provinces) there are 5550 required fleet units, Of these, 2700 cargo fleet units should be distributed in Fars province and 2850 cargo fleet units in Khuzestan province.

The Social Security Organization is the main focus of insurance in the private sector and is the largest insurer and is one of the major economic institutions responsible for providing support to other economic, social and household institutions. Therefore, in order to provide optimal service in the social security organization, it is necessary to design and implement a system of performance evaluation of the appropriate supply chain. For this purpose, in this study, NDEA was used to evaluate the efficiency and performance of the service supply chain in the social security organization. Because conventional DEA models operate on historical information, their greatest weakness is to determine the efficiency of decision-making units in the past and do not provide a framework for the future, so to solve this problem in this study and to predict future inputs and outputs from the method Simulation of system dynamics is used. In order to show the theoretical findings of the new model presented in a practical way, the performance prediction and performance evaluation of 15 Hormozgan provincial social supply chain branches in three years from 95 to 97 have been discussed.Finally, the efficient and inefficient branches were identified.

Terminals are major urban passenger centers that play an important role in collecting demand and distributing it on the network. The proper functioning of terminals depends on their proper planning, an important part of which is devoted to their principled location. The issue of locating intra-city bus terminals should be considered as optimization issues.

 The mentioned method is based on four consecutive stages, according to which, in the first and second stages, the candidate points for the construction of intercity bus terminals are selected according to the network of bus lines and the location of the lanes, as well as according to the existing terminals. In the third stage, the cost of construction and acquisition, the value of access to adjacent uses, as well as the amount of coverage that each candidate points provide in the city, are evaluated. Finally, in the fourth stage, the problem is transformed from a multi-objective mode to a single-objective maximization problem using the ideal planning method, as a result of which the top points are identified among the candidate points. In order to better understand the proposed method, the problem of locating terminals was implemented in the city of Shiraz, which finally selected the proposed 3-point algorithm as the final points for the construction of intercity bus terminals.

Examination of the results of the model and parameters of selected points shows that these points are among the important and effective points for the construction of the terminal and are relatively in good agreement with the policy of Shiraz Municipality Bus Organization in locating the terminals.

Originality/Value:

In this paper, an innovative method is used to solve the problem of locating terminals, which strengthens the existing knowledge.