Saeedeh Koohestani, Bijan Sayyafzadeh, Abdolreza Sarvghad Moghadam, Mahdi Sharifi,
Volume 10, Issue 4 (12-2023)
Abstract
By increasing the number of process industrial plants because of societies necessity to their productions, a new branch of accidents caused by various occurred process failures and their effect on the societies and environment and economy has been introduced. Beside it, the increase of the accidents because of natural hazards effect on the industrial plants and their huge costs to the societies and governments and high vulnerability of plants and urbanized territory to the branch of the accidents, increased the attention to this type of accidents. However, in many parts of the world still do not pay attention seriously to this issue and by considering them as very low probability accidents, eliminate paying attention and accepting the responsibility of them while the frequency of such accidents is under growing! In this article according to the existing statistics, an evaluation and comparison of consequences of natural hazards that caused NaTech events has been done. The purpose of the NaTech events is process events that triggered because of natural hazards that are known as events with low probability and high consequences that can affect a wide area and cause huge accidents associated with domino effects. After introducing and categorizing NaTech events, a comparison of their distribution and consequences of these events in Iran and the world has been done according existing articles and researches. Researches shows opposite of the natural hazards and their effects on some structures and infrastructures, Natech events has not been paid under attention enough in Iran. While the variety of industrial plants and their structures in Iran is high, their existing condition and repairing and maintenance of them is not proper and according collected statistics in this article, the potential of NaTech events is also high in country. In the first step, to increase the preparedness for NaTech events, review of effective world experiences in this field is recommended. Recognition of past events and categorizing them and codification of data that should be included in safety reports and scenarios evaluation and considering the domino effects and review the recommendations in this field are parts of this step.
Dr. Habibollah Fasihi, Dr. Taher Parizadi,
Volume 10, Issue 4 (12-2023)
Abstract
Seyed Mohamad Nazim Razavi, Navid Saeedi Rezvani, Seyyed Mohammad Rashtian,
Volume 11, Issue 4 (2-2025)
Abstract
The old textures of Semnan are part of the body and body of this city and It has physical, functional, economic and cultural values that with capabilities and talents potential, is considered a national capital. This body and structure are exposed to fundamental threats and requires the diagnosis of issues, challenges and their organization to prevent risks. The research pattern in terms of purpose, cognitive-evaluation; In terms of method, documentary - Library and field; In terms of time, sectional and in terms of data type, quantitative-qualitative. To determine the The sample size of the Cochran formula was used and 380 cases were determined as the final sample size for the research They were determined and the method of selecting respondents from among the residents of the studied area, with a sample The sampling was done randomly. Analyzes are done in the Spss environment and from Statistical tests such as; T-test, Friedman and numerical taxonomy for analysis has been used. The result of the one-sample T-test showed that the variables of good urban governance, in A level of less than 05/0 is significant and has an average situation in the worn-out fabric of Semnan city. Also The result of the test confirmed that the best situation is related to the axis of justice index with an average The rank was 24/4. The result of the test also It showed that the condition of worn-out tissue regeneration is weak. The results of the Friedman test also showed that there is a significant difference between the rank of variables. Based on the average ranks, the security variable with an average of 4.997 was in First place, followed by education, economy, health, culture, urban services and sports, respectively They were placed. Also The results of the analysis for 27 indicators show that the values Social and human development have the highest averages. Indicators related to identity Historical, internal development and health have also performed well. In contrast, public participation It has had the weakest performance. Most indicators such as accountability, Identity, attachment, interaction, income and infrastructure are at a medium to high level.
Dr Sayyad Asghari Sarasekanrood, Zahra Sharifi, Zahra Shahbazi,
Volume 11, Issue 4 (2-2025)
Abstract
Landslides, as one of the most dangerous natural hazards in mountainous regions, continuously threaten human infrastructure, especially roads and transportation routes. Their occurrence often results in significant loss of life and property, making it crucial to study and assess landslide hazards for effective zoning. The purpose of this research is to zone the landslide hazard along the Masal to Gilvan road using a neural network algorithm. The neural network algorithm is recognized as one of the most effective machine learning models, capable of solving complex problems in prediction and classification despite its simplicity. For this zoning analysis, nine influencing factors were considered: (1) geology, (2) vegetation cover, (3) slope, (4) land use, (5) distance from the road, (6) slope aspect, (7) elevation, (8) distance from fault lines, and (9) distance from rivers. The data were prepared, preprocessed, and then entered into MATLAB 2018. A neural network model was designed and implemented with 9 input neurons, 8 hidden neurons, and 1 output neuron. The results indicated that the four most influential factors, ranked by weight, were: slope (0.24), vegetation cover (0.17), distance from fault lines (0.14), and geology (0.11). Final validation using the ROC curve showed that the AUC values were 0.854 for the training phase and 0.971 for the testing phase, both of which reflect highly favorable results. The error rate was found to be very low.
Mr. Amir Azmoon, Dr. Habibollah Fasihi, Dr. Farzaneh Sasanpour, Dr. Taher Parizadi, Dr. Ali Shamaei,
Volume 11, Issue 4 (2-2025)
Abstract
Human health depends on living in a healthy environment. Various factors determine environmental health, which should be explored to be able to improve them. The purpose of this research is to analyze the factors affecting the health level of urban environment in district 20 of Tehran municipality and to find out their spatial inequality. This is a descriptive-analytical research based on documentary data of 6 indicators and survey data of 26 indicators. For the analysis, various tools of the GIS, especially the spatial analysis tool of Interpolation, are used. Quantitative analyzes are carried out by calculating statistical parameters in attribute tables. Findings show that the score of 2.29 out of 5 in the evaluation range of 1 to 5, indicates a poor situation of environmental health. Higher weakness belongs to the 6 indicators of the economic dimension including saving, sufficient income for buying cultural goods or going to recreational journeys, and residential home per capita. Access to urban parks and green spaces with scores of 4.55 and 3.43 respectively, show a superiority compared to other indicators. In the outskirts, the environmental health condition is much weaker than in the interior areas. Despite the vastness of worn-out fabric and informal constructions and abandoned spaces, what is more effective are the impacts of external factors, 3 sides of the district are limited to fringe lands, where the establishment of polluting industries, the passage of sewage canals and the replacement of foreign and the population involved in informal and illegal jobs are affected the health level of the urban environment.
