gholam reza moradi

Due to the upward trend of urbanization, the preparation of urban plans with a technocratic approach, the lack of participation of citizens in the preparation of plans, encroachment on the public space of the city, new terms such as the right to the city were gradually formed; And the people came to the conclusion and belief that in addition to the right to participate in urban affairs and decision-making, they have the right to own and allocate and enjoy suitable urban spaces, especially public spaces, which means that in a completely equal and fair way, the right to use urban spaces, especially spaces They are public and urban plans should be designed in such a way that they are suitable for the use of all classes and social groups. According to this process, in order to realize the rights of the citizens, demands should be taken into account in order to allocate and create space in the city for all groups of people. The urban space, especially the public space of the city, belongs to everyone and requires a change of approach in creating equal opportunities for everyone to use the urban space, this is exactly what we have rarely witnessed in the implementation of urban plans and rarely in Iran In the process of preparing and implementing these plans, it has been noticed that this is one of the most basic and fundamental flaws in the preparation of urban plans.

After stating the history, necessity, goals and characteristics of urban plans, especially the detailed and comprehensive plan, this research seeks to find out the effect of the rules and criteria of the detailed plan of Bushehr city on components such as appearance and urban landscape, enclosure, passive defense and the potential to create construction violations. From the point of view of the right to the city. Therefore, it should be seen, to what extent the rules of detailed plan of Bushehr city affect the urban rights of citizens, the right of possession and allocation in urban public spaces and the improvement of the quality of the city's public space? Are citizens willing to comply with these rules and regulations? Have unauthorized and unregulated constructions and construction violations caused the quality of public urban spaces to decrease from the point of view of the right to the city, and have the collective rights of all or at least most of the city's residents been respected according to the issues raised?

The present research method is descriptive and analytical. The collection of information is also by library and field method; In the library method, using various sources, statistics and maps, and in the field method, it has been done from the main neighborhoods of Bushehr city, such as Sangi, Jafrah, Ben Mane, Ashuri neighborhoods, and since in this research, the rules and standards of the detailed plan of Bushehr city and in particular The rules and regulations of the separation of residential use from the perspective of the right to the city and the explanation of the relationship between the two are discussed, it is aligned with theoretical researches; And since the analyzes performed can be used by consulting engineering companies, urban planners and designers, and even the executive system of cities, it is practical.

Studied Areas: 

In the current research, Bushehr city, as one of the southwestern cities of Iran and the center of Bushehr province, which has a population of 223 thousand people according to the 2015 census, is considered as a geographical territory (Iran Statistics Center, 2015). Bushehr is one of the cities that have had previous comprehensive and detailed studies; The last detailed plan of Bushehr city, following the comprehensive plan of that year, was approved in 1368 solar year, and it is set as the benchmark for Bushehr's executive institutions and organizations; After the expiration of the mentioned plan, the last master plan of Bushehr port under the title of strategic-structural plan of Bushehr city, which was prepared by Shahr and Plan Consulting Engineers Company, was approved by the Supreme Council of Urban Planning and Architecture of Iran in 2012, whose horizon forecast is for the year 1400. considered (Shahr and Program, 1392:115).

The lack of awareness of the citizens and residents of Bushehr neighborhoods about the right to the works proposed in Lefebvre's theory, which means the right to have information about what is going to be produced; It has caused such a chaotic situation. Therefore, the awareness of the citizens and residents of a city about what exists and is produced and what is going to be produced in the future will cause their cooperation in the formation of suitable public spaces. The presence of open public spaces in neighborhoods has been an important and influential factor in the presence of residents of a neighborhood in public arenas and their participation in creating local hangouts. He observed the public arenas and their participation in the construction of local hangouts and settlement of neighborhoods. The new regulations of Bushehr city have caused the lack of active presence of citizens in urban spaces and reduced the vitality of Bushehr neighborhoods. And finally, all these factors have caused what Lefebvre deals with in this theory, namely the participation of citizens in the production of urban spaces and the right of all classes and citizens to enjoy high-quality urban spaces, through the formation of such an enclosure.

In order to reduce the negative effects of urban plans and their rules and regulations on the structure of cities, the following suggestions have been presented: Avoiding the purely technocratic and positivist approach, while paying attention to the interests and needs of citizens, as well as a forward-looking view through the simulation of rules and regulations when preparing urban development plans, Paying attention to the existing context and identifying and correctly understanding the spatiality of cities in conducting climatic, economic, social and physical studies and compiling the rules and regulations of urban development plans, Coordinating the executive policies with the proposed policies of urban plans in the field of implementing the proposals, Creating a suitable context and platform for the participation of citizens in the preparation of urban development plans.

Urbanization and air pollution, especially in megacities, are major issues today. Understanding the factors contributing to this problem is crucial, and reducing the associated risks is a top priority for city and country officials. Arak City in Iran is one of the most polluted cities in the country, with industrial activities being the main cause of pollution. This research aims to investigate the meteorological factors that contribute to the pollution potential of Arak City, including wind speed, temperature, pressure, precipitation, boundary layer height, vertical velocity of the atmosphere at the levels of 825, 700, and 500 mb, and air conditioning coefficient. The study ultimately confirms Arak City's reputation as one of the most polluted cities in Iran.

In this article, from the 20-year statistics of the Arak observation station (1380-1399) for the quantities of the earth's surface, including wind speed, temperature, pressure, and precipitation, as well as the 20-year data from 2001 to 2020, the reanalyzed data of Era5 from the database ECMWF has been used for upper-level quantities. To check other atmospheric quantities, including boundary layer height, wind speed in the upper atmosphere, and vertical wind at 825, 700, and 500 mb levels, Era5 reanalyzed data with a resolution of 0.25 degrees extracted from the ECMWF database were used.

The results indicated that low temperatures in the cold period of the year, as well as low night and morning temperatures in the cold months of the year, can cause temperature inversion and increase the retention potential of atmospheric pollutants. The average wind speed indicates the low and insignificant effect of the wind, especially in the cold days of the year and in the morning and night hours. Daily per capita rainfall of less than 1 mm did not have a significant effect in reducing pollutants. The investigation of meteorological quantities in the upper levels of the atmosphere showed that the height of the boundary layer fluctuates between 200 and 1400 m daily, which was less than 400 m from late November to January. Analysis of the vertical velocity at altitudes of 825 and 700 hPa revealed a downward movement during winter, autumn, and spring, while an upward trend was noted during daytime hours in the summer season. Furthermore, a descent was observed at the 500 hPa level throughout all seasons during nighttime hours, which is not as effective as the other two altitude levels. Examining the daily air ventilation coefficient also indicated its high fluctuations throughout the year from 800 to 7500 m2s-1. The number of hourly changes also indicated fluctuation in the range of 22000 to around zero. The maximum ventilation coefficient at 12 UTC was between 3000 and 20000 m2s-1. At 00:00, 03:00, and 21:00 UTC, the ventilation coefficient was less than 1500 m2s-1 on all days of the year. Also, according to the location of Arak and Shazand, there is a possibility of the transfer of atmospheric pollutants from Shazand to Arak, especially in spring, autumn, and winter.

Overall, the study of weather patterns at both ground level and in higher parts of the atmosphere highlights the risk of pollution buildup and low ventilation in Arak City, particularly during the colder months and during nighttime and early morning hours. As a result, it is important for policies to prioritize the establishment of low-pollution industries and the management of sources of pollution, especially during the aforementioned times.

Location selection is vital in all types of businesses, including retail, wholesale, service, and manufacturing. This is particularly true for retail businesses, where location often plays a determining role in the success or failure of commercial activities. Agglomeration economies, where stores physically cluster together to gain mutual benefits, are common in retail. In Kazeroon City, many retail activities, especially clothing stores, have traditionally been located in the city center, within the Bazaar or nearby shopping centers. However, in recent years, a noticeable shift has occurred, with some stores opting for street locations instead. This research seeks to explore the reasons behind this trend of avoiding retail agglomeration and the criteria for selecting locations on the street.

Theoretical Framework:

Retail agglomeration occurs when similar or complementary retailers cluster in or near a location, creating a pull factor for both retailers and customers. This concept is a foundational element in economic studies and urban planning. Retail patterns can be categorized hierarchically, from central business districts to isolated store clusters, and by their form into planned or unplanned, linear, or isolated clusters. Three types of retail agglomerations are commonly distinguished: evolved (such as central business districts), created (such as shopping malls), and hybrid (like retail parks). Furthermore, these agglomerations can be classified as planned or unplanned, depending on their level of management and organization. Various theories such as Central Place Theory, the Spatial Interaction Model, Bid Rent Theory, and the Principle of Minimum Differentiation provide insight into how retailers distribute themselves spatially within cities and why they form agglomerations.

This research employs a qualitative approach to collect and analyze data. Kazeroon, a city in Iran's Fars Province, has over 4,877 active economic activities, 395 of which are clothing stores. Of these, 330 are located within the Bazaar or shopping centers (i.e., retail agglomerations), while 65 are located on the street. Data was gathered through face-to-face interviews with 24 street-based clothing vendors, and content was analyzed using MaxQDA software. Spatial analysis was conducted using GIS Pro software to map the spatial distribution and configuration of stores.

The primary reasons for retailers choosing street locations over the Bazaar included factors such as business hours, accessibility, parking availability, social networks, store atmosphere, the size of the shop, COVID-19 impacts, ownership, costs, and the unavailability of empty shops within the Bazaar. These factors can be divided into two categories: non-spatial factors (e.g., business hours, social networks, ownership) and spatial factors (e.g., accessibility, parking availability, store size). Interviews revealed that retailers were attracted to street locations because of convenient customer parking, high visibility, active streets, and proximity to major urban centers. These factors, as well as store size and ownership arrangements, were commonly cited as critical considerations in selecting a location.
The deductive approach based on theoretical foundations and past research revealed that parking availability, visibility, active street life, and proximity to major attractions were frequently mentioned by interviewees. Proximity to complementary stores, rental costs, and proximity to competitors were also noted but were not as prominent as in previous studies. The findings suggest that while proximity to complementary stores and cost considerations are significant in other research, in the case of Kazeroon, these factors were less influential. The unique conditions of the city, such as the lack of adequate parking near the Bazaar, shifted the emphasis towards street locations, where customer access is easier due to marginal parking availability. Active street life, visibility, and proximity to major land uses remain consistent with findings from other studies.
Notably, the influence of the COVID-19 pandemic, the growing role of social networks, and the atmospheric quality of street stores emerged as differentiating factors in this study, contrasting with findings from other research. Ownership arrangements and contract types also played a significant role in location decisions, providing an additional layer of complexity not often addressed in traditional retail studies. Moreover, it was discovered that some clothing stores are moving away from the city center and forming new retail clusters on the outskirts, creating new agglomerations.

The findings of this research underscore that store ownership is a significant factor in avoiding central city locations, as owning property eliminates the need to pay rent, reducing the perceived benefits of agglomeration. Additionally, the rise of social networks as a customer acquisition tool has decreased the reliance on physical proximity to the Bazaar. Limited business hours within the Bazaar, particularly closing on holidays and early evening closures, along with the confined atmosphere of shopping malls, have prompted retailers to establish street-based locations. Among the most critical factors influencing this decision is the ease of customer access, particularly due to the availability of marginal parking. Factors such as active street life, high visibility, and proximity to significant land uses are consistent with previous studies on retail location selection. However, the influence of proximity to competitors and complementary stores, which are frequently emphasized in the literature, were less significant in this study. The research also highlights that certain retailers, far from the city center, are forming new agglomerations in less central areas, indicating the emergence of new retail patterns in Kazeroon.
This research contributes to the understanding of retail location dynamics, particularly in smaller cities like Kazeroon. It suggests that retailers prioritize factors that facilitate customer convenience, such as parking and accessibility, over traditional agglomeration benefits. The findings have implications for urban planners and policymakers, particularly in addressing the infrastructural needs of non-central retail areas.

In this research paper, an innovative approach is employed to design and simulate a Bethe hole coupler utilizing ridge gap waveguide (RGW) technology. The RGW structure includes two parallel metal plates, a ridge, and strategically placed pins. To achieve the coupler structure, we place two waveguides facing each other, and between these two waveguides, there is a perforated metal plate. Initially, four holes are set in the plate between the waveguides to enhance the coupling coefficient's bandwidth. The radius of the holes is initially calculated and designed to achieve a 20 dB coupling. The validity of the design is confirmed using CST software. RGW transition design is usually more difficult than other gap waveguide structures. For this reason, in this paper, a technique called Step Ridge Waveguide Excitation (SRWE) is introduced for efficient excitation of the designed coupler. The proposed methodology is implemented in the Ku band, which is suitable for satellite communication with high bandwidth. The dimensions of our structure are 50mm × 30mm × 17mm. Additionally, a 20±2 dB coupling coefficient is obtained for a fractional bandwidth (FBW) of approximately 29%. It demonstrates a directivity range of 6-16 dB, and the isolation is lower than 23 dB, surpassing the performance of similar previous works.

Disturbing noise can cause physical and mental illnesses among workers; for this reason, it is necessary to restrain it, especially in workplaces. Using sound-absorbing materials with suitable acoustic properties has been a growing trend in mitigating noise. This study aimed to improve the acoustic properties of polyurethane foam (PUF) as a sound absorber.

In the present study, PUF was synthesized with different percentages of clay nanoparticles (0 -1.2 wt.%), and then the Sound Absorption Coefficient (SAC) of the synthesized PUF was measured by the acoustic impedance tube in the frequency range of 63 to 6400 Hz according to the ISIRI 9803 standard without an air gap behind the sample. The morphology of the foam was also investigated by Scanning Electron Microscope (SEM).

The results showed that the addition of clay nanoparticles to PUF improved the sound absorption behavior of the samples, and the best sound absorption behavior was for PUF with 1.2% weight of nanoparticles at low frequencies (500-2600 Hz). This increase in the absorption coefficient can be due to the increase in the number and smaller size of the pores with the increase in the amount of nanoparticles in PUF.

This study illustrates that the incorporation of clay nanoparticles into PUF at varying percentages results in an enhanced absorption coefficient. The presence of clay nanoparticles leads to a reduction in cell size and an increase in the number of pores, consequently enhancing surface friction. The absorption coefficient was observed to increase with the growing concentration of clay nanoparticles in PUF.

Knowing the sports programs of other countries can be a great help in planning police sports. Therefore, this research was carried out with the aim of identifying and analyzing public sports programs and police championships of the Islamic Republic of Iran in comparison with selected countries.

The method of the current research is descriptive-analytical, which according to the nature and type of the study, which is a comparative study, was carried out in four stages of description, interpretation, comparison and comparison using the George Brady model. The selected countries in the current research, in addition to the Islamic Republic of Iran, The 10 countries were England, Canada, Holland, America, Australia, Germany, Italy, China and South Korea.

In the section of public sports programs (in terms of the most important sports, bodybuilding, shooting, athletics, cycling and swimming, in terms of the most important activities, providing sports facilities near police headquarters, the necessity of individual and group exercise, scoring and recording the sports performance of police officers and employees), and in the section of championship sports programs (in terms of the most important activities, holding sports competitions at regional, district, city and national levels, membership in international organizations to participate in sports competitions, hosting events international sport related to the police) received the most points.

Public sports programs and police championships of the Islamic Republic of Iran need a fundamental revision in most parts. By doing this process, it is possible to double the effectiveness and efficiency of public sports programs and the championship of the Islamic Republic of Iran Police.

In this paper, desulfurization of gasoline and gasoil samples by oxidation method using hydrogen peroxide as the oxidant and molybdenum and tungsten catalysts of polyoxometalate type were investigated. The effects of various operational variables such as 4 types of catalysts, 4 levels of hydrogen peroxide to sulfur mole ratio, and 4 reaction temperature levels on 4 real fuels were analyzed using the Taguchi design of experiment. The results showed that tungsten and molybdenum catalysts of polyoxometalate type on supports like KSF and K10 montmorillonite exhibited suitable performance and stability for the oxidation of real fuels. The predicted removal of sulfur compounds in the optimal conditions of the Taguchi method (PW/K10 catalyst, temperature of 75°C, oxidant to sulfur compound mole ratio of 14) for the gasoline model after the HDS process was reported to be 69.04%. Under these optimal conditions, the experiments were repeated three times for the gasoline model oil, and the average sulfur compound removal of 70.33% was reported. The ANOVA analysis indicated a coefficient of determination R2 value of 0.987 for the model.

A lot of researches have done on the performance of different powder from catalysts of the form in dry reforming of methane in fixed bed micro reactors. However, few reports have published on the catalyst thin layer method for using in microchannel reactor that has less mass and heat transfer limitation. Recently, sputtering and evaporation methods have investigated in microchannel reactors for making a thin-layer catalyst, but these methods have problems such as; high cost and uncontrolled catalyst loading. In this study, the catalyst coated on both sides of the stainless steel plate, and the roughness prepared among the sandblasting method. The catalyst tested in a microchannel reactor and identified the products by chromatography. In this paper, the LaNiO3 perovskite catalyst synthesized in two states with alumina support and without the support thus coated on the plate. For characterizing the catalyst EDX, XRD, SEM, FTIR have been used. The results showed that the catalyst with the support had better stability and conversion rate than the catalyst without support. The catalyst performance and its stability tested at 800°C for 28 hours. The catalyst at this temperature showed the best results in dry reforming of methane with an average ratio of H2/CO = 0.91 for catalyst without the support and an average ratio of H2 /CO = 0.97 for the catalyst with alumina support. Hence, using a microchannel reactor has various advantages compared with a fixed bed reactor, such as; increasing heat and mass transfer and using less amount of catalysts. The method of coating the catalyst in this research showed good performance and stability compared to costly coating methods, such as sputtering in microchannel reactors.

The security management of football matches is of special importance for managers and sports planners due to the presence of numerous spectators in football stadiums. Based on this, the main goal of this research is the comparative study of disciplinary management of football matches.

This research is applied and a comparative study in terms of its purpose, and the required information was collected through the library and translation of research documents and reports using the comparative study method with the qualitative content analysis technique. The statistical population includes member countries of the World Football Federation (FIFA) in different continents, and the statistical sample was selected as a purposive sampling including the countries of England, America, Portugal, South Korea, Japan, Netherlands, Serbia, Brazil and South Africa. Data analysis was done using MaxQuda software version 2017.

According to the results of the research, the continent of Africa has the most accidents, the continents of Europe, Asia and North America are in the next ranks. The results show that at least 22 measures before the game to ensure the security of football matches include risk assessment, traffic and parking management, formation of command headquarters, , in the section of measures during the game, out of 22 measures, measures such as control of entry and exit points,, protection of the playing field, proper deployment, control and direction of spectators, use of cameras and finally in the 11 extracted cases regarding post-match actions, documentation of events and incidents, reporting and review, investigation of social performance problems, for future matches.

Providing and guaranteeing the security of important sports events such as football matches requires a professional service-oriented and modern police mechanism with the ability to compete with traditional and inefficient mechanisms and is coordinated and compatible with today's conditions.

This paper presents some microwave circuits, designed for characterization of materials’ permittivity. These include single and multiple-resonant types, transmission line approaches, radiation structures and planar circuits. They have either theoretical analysis, simulations, behavior analysis, or fabrication results. A simple half-wavelength coaxial system is used for measuring velocity factor or dielectric constant of the cable. This method presents very accurate results. A planar multi-dielectric antenna structure is proposed whose layers comprise the dielectric under test. The near field as well as the radiation performances are influenced by the permittivity, which is the basis for determining this parameter. Also, a planar resonant cavity is designed and optimized to give enhanced coupling performance and gets higher quality factors. It has a small size and its sensitivity is improved employing a chamfer. The values of dielectric constants are extracted from scattering parameters. In another method, a three-section microstrip line is used whose time domain response is employed to retrieve the dielectric constant. This method can be generalized to other planar lines. At last, a simple method for measuring complex conductivity of lossy planar conductors is studied and it is employed for characterization of a graphene oxide layer.

Assessing the level of development of communities has been a concern for regional planners in all countries. The use of quantitative criteria for the classification of settlements leads to understanding the level of inequality between residential areas and provides a measure to reduce and eliminate these inequalities. To address regional imbalances, regions need to be identified and classified based on their level of development in different areas. The aim of this research is to identify disadvantaged areas and plan for reducing intra-regional disparities to achieve balanced development. In this study, 12 indices have been selected within the framework of numerical taxonomy analysis to assess the level of development and classify the counties of Bushehr Province. The research method used in this study is descriptive-analytical. Based on this classification, Bushehr with a development coefficient of 0.01382 is the most developed city, while Jam with a coefficient of 0.724444 is identified as the most disadvantaged city in the province. The results of this research indicate a center-periphery pattern dominating the spatial structure of Bushehr Province.

Universities are the origin of society's transformations in various fields and students as the main pillars of the university form the main body of various organizations and organs of the society. For this purpose, it is necessary to have information about the current situation and the attitude of students towards their field. This study was conducted with the aim of investigating the effective factors in the selection of nutrition science students of Varastegan Institute for Medical Sciences.

This is an applied study that was carried out in a descriptive-cross-sectional way. The studied population was students studying nutrition sciences at Varastegan Institute for Medical Sciences. To collect data, a questionnaire was created by a researcher, whose validity was evaluated with the help of expert panels consisting of experts in the health information technology group of Varastegan Institute for Medical Sciences, and the reliability of the questionnaire was determined by determining Cronbach's alpha.

According to the findings of the study, the majority of users were 68.7% female and 31.3% male. 43.3% of students had an average knowledge and awareness of their field and 44.8% had a positive view of their field. 8/ 38% of students chose this field based on the recommendation of others. The satisfaction with the field of study of the current study was 49.3%, which was close to the satisfaction of half of the students under study, and 61.2% of the students were very satisfied with the assignment of medical system code and having an office. 41.8% of nutrition science students were very satisfied with their career future and 41% believe in the existence of a suitable job market.

The most important factor in choosing a field is the assignment of the code of the medical system and having an office at the time of employment, and many students believe that this field is suitable for social values and the existence of a suitable job market, and they consider the relevant job interesting and purposeful to serve the society.

Knowledge of aircraft last position and trajectory is of the utmost importance for search and rescue in aviation today. In case of an accident, this information is necessary for rapid response.The existing method of reporting the whereabouts depend upon pilot reports during flight or signals from special equipment such as emergency location transmission. Future renovation to Air Traffic Control system has been planned which requires the installation of automatic Dependent Surveillances – Broadcast. However, it will take some time to implement such systems in all aircrafts and providing the necessary infrastructure. This paper proposes Geo-tagging the pilot communication using Code Division Multiple Access (CDMA) method. It is an intermediate, yet inexpensive, solution for worldwide application in aviation which can be implemented quickly. It takes advantage of the existing equipment both in the air as well as on the ground. The simulations presented show the applicability and efficiency of the proposed routine.

In this study, the catalytic performance of thin layers of Ni-Co/Al2O3-ZrO2 was explored using the dry reforming of methane (DRM) in a microchannel reactor. Physical vapor deposition (PVD) was used for preparing the nanostructures. To this end, first, thin layers of Al2O3-ZrO2 were sputtered on stainless steel plates to form catalyst supports. Then, the combination of Co and Ni were coated on the catalytic support during different deposition times (2, 3, and 4 min) with Co/Ni weight percentages of 2.5%, 5%, and 7.5%. Box-Behnken design was used for the reactor tests, which were performed under certain conditions (i.e., temperature: 700, 750, and 800 ˚C; pressure: 1 atm; and feed flow rate: 10 ml/min) to assess the impact of various parameters (including deposition time, Co/Ni weight percentage, and reaction temperature) on catalytic activity and stability. The results showed that the highest level of activity and stability was registered at the deposition time of 4 min, the Co/Ni weight percentage of 5%, and the reaction temperature of 800 ˚C.

Biodiesel, as a renewable and environmentally friendly fuel, is a feasible alternative to fossil diesel, which has gained great popularity in recent years. However, due to some undesirable properties such as higher viscosity, biodiesel must be blended with diesel in order to be utilizable in a diesel engine. Therefore, a reasonable approach is required for predicting the diesel-biodiesel blend properties. This study tries to estimate two substantial properties of blend, i.e. kinemattic viscosity (KV) and cetane number (CN), through neural network (NN) and empirical models which use pure properties of biodiesel (kinematic viscosity, boiling point, evaporation point, flash point, pour point, heat of combustion, cloud point, and specific gravity) as independent variables. In this regard, a three-layer feed-forward network with varying input parameters, training algorithms, transfer functions, and hidden neurons has been examined to predict the KV and CN of the diesel-biodiesel blend. Besides, the prediction capability of thirty empirical equations is investigated to determine the top equations describing blend properties. The result reveals that an ANN with three input parameters of biodiesel concentration (%), the CN of biodiesel, and biodiesel cloud point has the best prediction quality of CN with an R-value of 0.9961. Moreover, NN estimates the KV of blend with the highest correlation coefficient of 0.9985. The results corresponding to empirical equations also indicate that fractional-exponential equations are the best describer of the CN and KV of blend with R-values of 0.9947 and 0.9980, respectively.

A novel hybrid surfactant-type polyoxometalate, [(C16H33)N(CH3)3]6 [PV3W9O40] was synthesized and characterized by FT-IR, SEM and EDX analyze. Oxidation of sulfur compounds in gas condensate with H2O2 as oxidant using surfactant-type polytangestovanado phosphoric catalyst and acetonitrile as solvent was studied. The total sulfur content of the samples was determined by UV Fluorescence. The catalyst were evaluated for the oxidative desulfurization of gas condensate from Ilam Refinery Company and straight-run diesel from Kermanshah Oil Refining. Results show that the catalysts keep the Keggin structure. The sulfur level of a gas condensate can be lowered from a few hundred 1800 µg/g to 83 µg/g only at 5 min and the sulfur removal 98.83% was obtained at 15 min. Also, the desulfurization rate of straight-run diesel can be up to 82% at 30 min. In addition, the reusability of catalyst after five times showed that the catalytic activity had a few decrease from 97.22 to 92.11 percent sulfur removal of gas condensate.

The violent behavior of the spectators is one of the most important issues for the organizers of the popular and exciting football matches, which occurs under the influence of various conditions and may have irreparable consequences. Therefore, the aim of the present study is to investigate the effect of demographic characteristics of football spectators on the control of their violent behavior.

In terms of its objectives the current research is of an applied type and in terms of method and nature it is descriptive and survey type. The statistical population included two parts. The first part includes all football spectators in the year 2018-2019, which was considered to be 100,000 people on average, and the sample size of 200 people was calculated using Morgan's table. The second part included the employees of the special police unit of Tehran for about 370 people, 184 of whom were selected for the statistical sample and completed the researcher-made questionnaire whose validity (face and content) and reliability were confirmed. Binomial, U-Man-Whitney and Wilcoxon statistical tests were also used for data analysis.

The findings of the research test showed that from the point of view of football spectators and special police unit employees, demographic characteristics including age, marital status, job, education, residence and geographical region play an effective and significant role in controlling the violent behavior of spectators (Sig=0.000). However, there is a significant difference between the two groups of special police unit employees and spectators regarding the intensity of the influence of marital demographic factors (Sig = 0.09), place of residence (Sig = 0.38) and geographic region (Sig = 0.12).

According to the obtained findings, for the effective control of sports gatherings, it is necessary for the authorities to consider the demographic characteristics of the spectators and plan and implement appropriate control measures accordingly.

Today, cities are extremely vulnerable due to population growth, industrial expansion, consumption of fossil fuels as a result of greenhouse gas emissions, air pollution, and finally climate change. With the expansion of cities, many natural surfaces go under construction, more synthetic materials are used, and population and building densities increase the production of heat from human activities. All of these cases, along with the type of land use in the city, cause certain characteristics such as radiant power, heat capacity, albedo, etc., and show a different surface temperature than other places. Space technology has been used successfully to determine surface temperature and urban energy balance. In this study, the surface temperature of districts 1 and 21 of Tehran was identified using Landsat 7 satellite images and its surface temperature was estimated by adapting it to the land use map of these areas. The results show that there is a close relationship between land use and surface temperature, as in these two areas, depending on the role and activity of each area, different surface temperatures have been identified. District 21 with industrial and workshop operations, barren lands, lack of vegetation, lack of waterways, and excessive use of artificial and industrial materials as well as production of heat due to human activities shows an average surface temperature of 5 degrees Celsius higher than that of region 1.

Inactivation of Ni catalysts in the dry reforming of methane process has been one of the issues of concern. The use of active and base phase promotors and the synthesis of Ni-CO / Al2O3-MgO catalysts by impregnation method have been considered in our research. The main focus of this study is to evaluate the effect of addition of the promotors on the performance of synthesized catalysts in wall-coated microchannel reactor. XRD, BET and FESEM analyzes have been performed to determine the characteristics of the synthesized samples. The use of amplifiers increases the catalyst activity and makes it more stable.

Hypothesis: The goal of the study was to focus on improving the acoustic and mechanical properties of polyurethane foams doped with rock wool fibers, at different percentages (rock wool fiber) (0-1.2% by wt), that were synthesized using the polymerization process.

In order to fabricate acoustic composites, the relationship between non-acoustical parameters (airflow resistivity, porosity, density, and percentage of reinforcing fibers) and microstructure with sound absorption coefficient (SAC) was investigated. SAC was measured using a two-microphone impedance tube in the frequency range of 63-6400 Hz according to the ISIRI 9803 standard without an air gap behind the sample. Physical structure morphology and tensile strength were investigated using field emission scanning electron microscopy (FE-SEM) and tensile strength test, respectively. Non-acoustic measurements including porosity and air flow resistance (AFR) were performed using porosimetry test (BET) test, and Archimedes method. 

The results showed that increasing the RF amount in the polyurethane foam increased the hardness of the foam surface, and the SAC increased in all frequency range on all the studied samples. The highest SAC was shown by fiber-polyurethane composite foam (2% by wt) sample in the frequency range of 2000-4000 Hz. This increase in the sound absorption coefficient is probably related to the reduction in pore size with the increase in the amount of fibers in polyurethane foam, as shown by the morphological results. The mechanical properties (tensile strength) of foams were investigated by changing the amount of reinforcing fibers. The results showed that the tensile strength of composite foams significantly improved by adding fibers. Eventually, regression analysis was performed to investigate the relationship between non-acoustic parameters (airflow resistivity, porosity, density, and percentage of reinforcing fibers) and SAC. A relatively good fit between the experimental and statistical data was obtained. The data and results of this study showed that composite foams can be used to reduce noise.

Safety climate potentially affects safety performance in high-hazard industries. Resilience is a developing concept and is defined as the ability that can affect the continuous improvement of safety performance. The present study assesses the influence of organizational resilience on workers’ safety performance in a steel-manufacturing industry. In this regard, the safety climate mediates the effect of organizational resilience on safety performance.

A cross-sectional study was accomplished in the steel manufacturing industry in 2021. The survey included three parts: (1) organizational resilience, (2) safety performance, and (3) safety climate. Besides, the organizational resilience was measured by a scale with six dimensions and 19 items. Also, safety performance was assessed by six items regarding two performance dimensions (i.e., safety compliance and safety participation). In addition, safety climate was measured by 19 items, comprising four dimensions (i.e., safety communication, supervisor safety perception, coworker safety perception, and work pressure).

The structural equation modeling results showed that the organizational resilience and safety climate had significant impacts on safety climate (β = 0.23, P ≤ 0.05) and safety performance (β = 0.43, P ≤ 0.05), respectively. Also, the indirect results indicated that safety climate mediated the relationship between organizational resilience and workers’ safety performance.

The increment of organizational resilience and safety climate improves workers’ safety performance. Besides, organizational resilience and related dimensions (e.g., reporting culture, learning, and awareness) improve the safety performance dimensions (i.e., safety compliance and safety participation).

Nurses and medical staff and health technologists as the largest segment of the health system are the main users of health information systems that understanding the perspective and how to use this system can be effective in i mproving the quality of community health. The aim of this study was to evaluate the performance of the Sib system of health centers in Bojnourd and Neishabour.

This is an applied study and was performed by descriptive cross - sectional method. The study population included all users of the Sib system in the health centers of Bojnourd and Neishabour who used the Sib system. Sampling was available and data were colle cted using a researcher - made questionnaire and data were analyzed using SPSS software version 21.

According to the findings of the study, the majority of users were 70% female and 30% male, 58% were in the age group of 30 - 39 years, and 40% of them had 5 - 9 years of work experience and also 63% of System users have a bachelor's degree. In the technical field, from the point of view of 40% of users, the ease of using the system is moderate.

Based on the identified factors, by strengthening the advantages of the system and also trying to eliminate or reduce the shortcomings in it, it is possible to institutionalize and use the system more practically in order to solve health problems.

The expansion of urbanization has significant effects on the planet. One of the effects that people are dealing with today is global warming, which has appeared as urban heat islands. Heat islands are urban areas that are significantly warmer than the surrounding environment. The purpose of the research is to extract the spatial-temporal changes of the thermal islands of Shiraz using satellite images and to determine the relationship between the type of land cover and its surface temperature. In this regard, first the necessary pre-processing was done to prepare a user map on the images and the changes in land cover, water, wind, vegetation and albedo and the sky visibility index of the studied area were also extracted and satellite images were prepared and interpreted in the GIS environment. The results show that point number 9 (Qasr al-Dasht gardens of Shiraz) has the lowest temperature and this shows the inverse relationship between green spaces and thermal islands. The use of remote sensing data plays an important role in the management of urban space and effectively helps city managers in urban space planning. Urban building materials have a significant effect on intensifying heat islands in such a way that the use of standard materials reduces the temperature to a large extent, and vegetation has a reducing effect and built surfaces have intensifying effects on heat islands. The pattern of spatial and temporal distribution of thermal islands is influenced by the pattern of land use distribution.

Today, non-criminal strategies and situational prevention are of special importance in crime prevention. Exercise can be considered as a way to prevent crime. The purpose of this study is the relationship between sports and social health with crime prevention in prisoners in Golestan province.

This is an applied research that was done by descriptive survey method. The statistical population of the study consisted of 500 prisoners aged 20 to 35 years in Golestan province. The sample size was 217 using Morgan table with a simple random method. The research tool was a researcher-made questionnaire whose face validity and content of the questionnaire were confirmed by experts and specialists. The reliability of the questionnaire was calculated using Cronbach's alpha (0.83).

The results showed that the physical-mental condition and social health of general athlete prisoners is much better than championship-professional sports prisoners. Another result of the study showed that the better the physical-mental health and social health of athlete prisoners, the more crime prevention will be done. Prisoners of public athletes also have better conditions than athletes of championship-professional sports in crime prevention.

Exercise has an effective role in the motivation and treatment of physical and mental diseases and the acquisition of social health, so one of the best ways to guide the incompatible person in the direction of construction is to involve the person in motor and sports activities.

Electrospun nanomembranes have been used for effective air filtration due to their potential for active surface modification. This study aims to synthesize polyurethane (PU) nanofiber membrane incorporated with different amounts of β-cyclodextrin (β-CD) to capture volatile organic compounds (VOCs) along with aerosol filtration from the air.

First, PU was synthesized by MDI method. A 10 wt% PU solution in DMF/MEK (1:1 wt) was prepared. Various amounts of β-CD powder (0, 1, 2, 3, and 5 wt% of PU) were dispersed in the prepared PU solution. Electrospining process was carried out under determined parameters (20 kV applied voltage, tip-to-collector distance of 10 cm, solution feed, and rate of 1 ml/h). The chemical structure and morphology of the produced samples were assessed by FTIR and SEM, respectively. Finally, air filtration and toluene adsorption of different electrospun membranes were measured.

The highest filtration performance was observed for PU with 1 wt% β-CD nanofiber. Due to increased efficiency (83.13%) and low-pressure drop (∆P = 19 pa), this sample had a considerable quality parameter. The results demonstrated that the membrane loaded with β-CD was able to adsorb hazardous and carcinogenic VOCs. It was confirmed that adding β-CD into PU improves the adsorption capacity due to forming a π complex and having a different tendency against capturing a variety of VOCs.

The study results revealed that the PU nanofiber incorporated with β-CD, along with the ease of regeneration, can make them attractive for air filtration and VOCs adsorption.