List of Articles Karaj

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  1 - The impact of security and vitality of the urban space on the development of citizen relations in Gohardasht Street, Karaj
  Mahdi Lotfi Rahim Sarvar Ali Tavakolan
  10.30495/sarzamin.2023.74839.2114
  The purpose of this research was to determine the impact of security and vitality of the urban space on the development of citizen relations in Gohardasht Street, Shahr Karaj. This research was applied and its method was descriptive-correlation. The statistical populati More

  The purpose of this research was to determine the impact of security and vitality of the urban space on the development of citizen relations in Gohardasht Street, Shahr Karaj. This research was applied and its method was descriptive-correlation. The statistical population of the research was all the residents of Karaj (1,592,492 people), out of which 384 people were selected as a sample using Cochran's sample size formula. The tool used in this research was a researcher-made questionnaire.The findings of the research have shown that the relationship between the safety and security and the vitality of urban spaces with the development of citizenship relations among the citizens of Karaj is significant, and in the meantime, according to the values of the correlation coefficient, the relationship between the vitality of urban spaces and the development of citizenship relationships is more intense. . Also, the statistical characteristic of the regression has also shown that 43.5% of the variance related to the development of citizenship relations among the residents of Shahr Karaj is explained by the variables of safety and security, liveliness and readability. that the vitality variable of urban spaces has the highest impact factor and safety and security has the lowest factor. The safety and security of the urban space has had an impact on the development of citizen relations on Gohardasht street in Shahr Karaj, which has a significant impact factor. In addition, among the two investigated variables (safety and vitality), the safety variable had the least impact on the relationship of citizenship. The vitality of the urban space has had an impact on the development of citizen relations in Gohardasht Street, Shahr Karaj, and its impact coefficient is also significant. In addition, among the two investigated variables (safety and liveliness), the liveliness variable has had the greatest impact on citizen communication, the result is that the liveliness of urban spaces, especially in Gohar-Dasht Karaj Street, has had an impact on the social communication of citizens. Because when the space has the necessary vitality, a person's presence in this space creates a feeling of happiness and joy in him, which leads to establishing a relationship with others. This happiness has led to the strengthening of the sense of belonging to the city in the citizens, and since it satisfies a natural need, it will give him a sense of happiness in life. Manuscript profile
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  2 - Site selection for construction and demolition waste management facilities using GIS & FVIKOR (Case Study: Karaj)
  Zahra Hasannezhad Saeid Mehrabian
  10.30495/jest.2022.14472.2305
  Background and Objective: Selecting a suitable site for construction and demolition waste management facilities, is one of the critical decision-making issues, which requires a comprehensive evaluation. The high amount of construction and demolition waste produced More

  Background and Objective: Selecting a suitable site for construction and demolition waste management facilities, is one of the critical decision-making issues, which requires a comprehensive evaluation. The high amount of construction and demolition waste produced compared to the total production of waste makes it absolutely necessary to determine suitable sites for landfilling this type of waste. The objective of this study is to present the methodology to select a suitable site for this kind of waste.Material and Methodology: There are three steps in evaluating the sites in this research. In the first step, after determining the effective factors and determining their weight by the Eigenvector Method and hierarchically, the studied areas were evaluated with 28 criteria in a fuzzy method by geographic information system (GIS). In the second step, the suggested areas by GIS, by 7 other criteria were rated by the use of FVIKOR and the score of each area was found. In the third step Final rating of sites were done by two criteria (the achieved scores of GIS and the achieved scores of the FVIKOR method).Findings The final weight of evaluation criteria by GIS and FVIKOR methods was 0.86 and 0.14, respectively, and 21 places were ranked in three steps.Discussion and Conclusion: The approach used in this study is using (GIS) and fuzzy logic, considering the weight and relative importance of each criterion and use a suitable method for rating that increases accuracy and reliability of assessment. Manuscript profile
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  3 - بررسی عملکرد الگوریتم شاهین هریس در بهینه‌سازی مخزن سد
  کبری رنجوری مهدی اژدری مقدم سید آرمان هاشمی منفرد سیما اوحدی
       در هر منطقه ­ای بر اثر کمبود نزولات جوی و با هر نوع آب ‌و هوایی امکان رویداد پدیده خشک‌سالی وجود دارد. این پدیده به عواملی مانند دمای بالا، رطوبت نسبی پایین، ضریب پایین ذوب برف، باد و کمبود بارش بستگی دارد. بهره ­برداری بهینه مخازن با در More

       در هر منطقه ­ای بر اثر کمبود نزولات جوی و با هر نوع آب ‌و هوایی امکان رویداد پدیده خشک‌سالی وجود دارد. این پدیده به عواملی مانند دمای بالا، رطوبت نسبی پایین، ضریب پایین ذوب برف، باد و کمبود بارش بستگی دارد. بهره ­برداری بهینه مخازن با در نظرگرفتن اهداف مهم چندگانه در کنار یکدیگر و به‌صورت هم‌زمان از اهمیت بالایی برخوردار است و به همین جهت لازم است حجم مخزن در هر ماه مدیریت شود؛ زیرا کارایی مخزن در کنترل سیلاب به حجم مخزن و مشخصات ژئومتری آن و سرریز بستگی دارد. در این مطالعه با استفاده از نرم‌افزار MATLAB و یک الگوریتم بهینه شاهین هریس داده‌های سد امیرکبیر کرج به جهت یافتن میزان بهینه برداشت از مخزن سد، نوشته شد و الگوریتم شاهین هریس مورد ارزیابی قرار گرفت. الگوریتم مبتنی بر جمعیت، فرآیند جست­­جو را در دو مرحله اکتشاف و بهره­ برداری انجام می‌دهد. در الگوریتم شاهین هریس پارامترهایی وجود دارد که تغییر در مقدار آن‌ها بر عملکرد این الگوریتم تأثیر می ­گذارد. در این مطالعه مقدار کمینه تابع هدف در الگوریتم شاهین هریس بررسی‌شد. با افزایش تعداد تکرارها، مقدار تابع هدف بهبود پیدا می ­کند و بهترین مقدار تابع هدف، در تکرار 64000 با مقدار 8934/25 بود که بهترین عملکرد الگوریتم در این تکرار به‌دست‌آمد. Manuscript profile
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  4 - A Study of the Effects of Purkan Village Wastewater Refinery on Qualitative Parameters of Karaj River
  Faezeh Hosseini Amir hesam Hasani Amir hossein Javid Mojtaba Sayadi
  Today the River of Karaj is exposed to all kinds of pollutions and destruction of ecosystem because of thedestructive effects of Tehran, a city with millions of residents. So it is important to examine the quality of thewater of this river to collect information about t More

  Today the River of Karaj is exposed to all kinds of pollutions and destruction of ecosystem because of thedestructive effects of Tehran, a city with millions of residents. So it is important to examine the quality of thewater of this river to collect information about the current situation. The objective of this study is to find out therole of the Purkan sanitary wastewater refinery on the quality of the water of the river. In current study, sampleswere collected from four stations: into, out of, before, and after the refinery, in seasonal form, four stages.Concentration of NO3,NH3,PO4,BOD5,COD,TSS,pH indices were tested according to methods suggested bystandard methods reference. Considering the results of the samples, data analysis was done using statistics. Theresults of physical , chemical and microbial analyses of the samples show that the refinery has no good role indecreasing basic parameters such as COD, TSS and FC (specially in summer season). In many cases, theparameters were more than the limit. The water in the river has an almost fixed condition, so; entrance of thewastewater into Karaj River does not show a great negative effect. As a result, it seems necessary to make aprogram to find a solution to remove the problems. Prevention of the direct entrance of the wastewater into theriver, modification of refinery function, optimization of filteration, and the use of wastewater in artificialirrigater may help remove these problems. Manuscript profile
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  5 - Comparison of social barriers to participation in sports activities of male and female secondary school students in district 2 of Karaj
  Akbar Mahdavi Abas Nghizadeh Baghi مهرداد محرم زاده
  Objective: Adolescence is one of the most important stages of human life, teenagers are a dynamic force of society and this active population cannot be ignored, knowing the personality traits of teenagers can help a lot in planning for their future. The aim of the resea More

  Objective: Adolescence is one of the most important stages of human life, teenagers are a dynamic force of society and this active population cannot be ignored, knowing the personality traits of teenagers can help a lot in planning for their future. The aim of the research was to compare the social barriers to participation in sports activities of second high school girls and boys in District 2 of Karaj. Methods: The descriptive research method was a survey conducted in the field. The statistical population available in the current research were the second-grade female and male students of the 2nd education district of Karaj, according to the statistics and information center of that department, in the academic year 1402-1403, there were 7410 female students and 6674 male students. A cluster of 373 people was determined using Morgan's table, and after collecting the questionnaires and removing incomplete and outliers, the data of 334 questionnaires were analyzed. The tool for collecting the questionnaire of social barriers to participation in sports activities (Ahmadi, 2018) was used. The validity of the questionnaire was confirmed by expert professors of sports management and psychology, and the Cronbach's alpha reliability coefficient of the questionnaire was reported as 0.88. The method of data analysis was using descriptive statistics (including mean, median, mean, etc.), and in the inferential statistics section, independent t-test was used, and Friedman's method was used to rank social barriers. Results: The findings of the research showed that there is no significant difference between the social barriers to participation in sports activities of male and female students in district 2 of Karaj. Conclusions: Therefore, it can be concluded that the education and training of District 2 of Karaj can contribute to the participation of all male and female students by creating spaces and sports halls or by signing contracts with sports venues and allocating suitable times and encouraging students to do sports activities. It was in sports. Manuscript profile