Showing 30 results for Mohammadi
Mehdi Mohammadi Kuchesfahani, Mohammad Jalili, Mahmoud Nouraie,
Volume 20, Issue 58 (9-2020)
Abstract
Despite Iran's capabilities in the field of tourism, unfortunately, it has not been able to achieve a worthy position in this industry. One of the factors that can develop and improve the country's tourism industry is the use of effective marketing tools and parameters, including introverted marketing. This research is applied in terms of purpose and descriptive-analytical in terms of method. The statistical population of the study consisted of incoming tourists to hotels and restaurants active in the city of Rasht who were active in social networks. The sample size was estimated to be 384 using the Cochran's formula. The data collection tool was a researcher-made questionnaire whose validity was confirmed as qualitative and quantitative validity and its reliability was confirmed using Cronbach's alpha method and combined reliability. In this study, in order to analyze the research data from the software SPSS and Amose were used. The findings of this study showed that the components of social construction, social listening and online content of introverted marketing have a positive and significant effect on the intention of electronic advertising. The results of this study also showed that the components of introverted marketing, ie social construction, social listening and online content have a positive and significant effect on the selection of tourism destinations. Other results of this study can be the positive and significant effect of advertising intentions on the choice of tourism destinations and also the mediating role of this variable in the relationship between the components of introverted marketing with the selection of tourism destinations.
Mohammad Golmohammadi, Mohammad Adalatkhah, Akbar Abdollahzadeh Tarf,
Volume 20, Issue 59 (12-2020)
Abstract
Many factors, including cultural factors, currents and schools of thought, and patterns of urbanization in the world are influential in the physical structure of a city. The physical structure of the city is the result of all the forces that give rise to the formation and formation of a settlement and has an objective and mental appearance. The growth and development of cities, due to various events in all historical periods, has been declining and rising. Nowadays, knowledge of the physical structure of the city and the reasons that govern its spatial expansion in different periods is necessary to control its expansion and is one of the important factors influencing the success of urban planners and designers. This study was written with the aim of identifying and prioritizing cultural factors affecting the physical structure of the city with emphasis on indigenous architecture. The present research is applied in terms of purpose and descriptive-analytical in terms of method. Library and field methods were used to collect information. The statistical population of the study consisted of experts and specialists in architecture and urban planning, with a sample size of 30 people. In order to achieve the objectives of this study, the fuzzy Delphi technique and the BMW model were used. The results of fuzzy Delphi technique confirmed the identified factors and sub-factors. The results of the BMW model showed that among the identified factors, the privacy factor with a final score of 0.298 in the first place, the security quality factor with a final score of 0.273 in the second place, the nature connection factor and social interactions with a final score of 220 / 0 is in the third place and the hierarchical factor is in the fourth place with a final score of 0.209.
Mahdi Mohammadi,
Volume 21, Issue 60 (3-2021)
Abstract
This paper focuses on convergence with the measures and activities of the global assemblies in order to promote the resilience of cities against earthquakes and to pay attention to their physical- skeletal development process, to analyze the resilience of the city of Zanjan and to design scenarios against the earthquake hazard. The criteria used in order of priority and importance include: type of structure, building quality, building life, number of floors, occupancy level, enclosure coefficient, building density, grading, distance from the fault, number of units in the building, user adaptability, slope and facade Building, Which are applied in the three earthquake resilience scenarios after analytical hierarchy analysis (AHP) based on (relation No. 1).
According to the maps drawn from the scenarios, the resiliency rate in the central and southern parts of the city was weak and very weak and as far as we move north, west, and east, we increase the amount of physical resilience of the area. However, no resonance images in the scenario maps show any area with a very resilient domain. As in Ramallah scenarios 7 and 8, the resilience is in a non-resilient and very weak domain. The analysis shows that, according to the maps in any of the areas, there is no stability in the resilience That is, no area in the assessment of all criteria is resilient.
Ms Elahe Kavoosi, Dr Jamal Mohammadi,
Volume 21, Issue 61 (6-2021)
Abstract
Our country Iran is not far from the global changes of cities. One of these changes is the smart mobility that is Undeniable and inevitablein urban management today. Especially in metropolises, which are facing increasing population and various economic, social and environmental problems. In fact, metropolises always have many problems, most importantly transportation. Shiraz, as one of the major cities and one of the major cities of the country, has a special place. This position is of different cultural, historical, political and other aspects. Its population growth rate has also been steadily increasing due to its location. This trend of population growth over the past few decades has created problems and obstacles for sustainable and desirable management, most notably problems in the transportation sector. The same trend illustrates the need to emphasize smart systems in this city. Therefore, in this study, it is attempted to investigate and analyze Smart Urban Mobility and Social Sustainability for Shiraz. The research method is descriptive-analytical and based on documentary and origin studies. The results show that the mobility and displacement variables are in poor condition based on different dimensions of access, sustainable transport as well as ICT. Different indices of each of these dimensions point to the same issue, as its level of evaluation (significance level less than 0.05 and average lower than the criterion) points to their undesirability from the point of view citizens. The study of the impact of smart mobility indicators on Social Sustainability also shows that smart mobility indicators account for 23% of the total variance of Social Sustainability. On this basis, it should be noted that the mobility variable does not have an appropriate position in Shiraz, and this has not only affected its development process in recent decades, but also poses many challenges for its future development. The growing trend of the population and on the other hand the various social and cultural features as well as tourism are evolving in such a way that it requires a major focus on a systematic transportation based on smart city approach.
Mitra Ghorbi, Mrs Maryam Naghavi, Dr Hamid Mohammadi,
Volume 21, Issue 62 (9-2021)
Abstract
Interactions and sometimes contradictions in economic and cultural priorities which happen due to social transformations, changes in paradigms and changes in economic – political systems led to changes in urban regeneration concept. The role of culture in urban regeneration had significant changes comparing to other factors; and the cultural focuses became the main approach in urban regeneration in recent decades. The quality of built environment and level of residents’ satisfaction plays an important role in regeneration policies of target areas as well. This study investigates the impact of environment quality variables (environmental, physical, economic and social) on level of residents’ satisfaction in cultural neighborhoods of Kerman, with the goal of improving the regeneration process.The method of this research is applied-developmental in terms of the aim, and descriptive and causal comparative in terms of the nature. This study uses questionnaire as a tool for collecting data. The study sample size is 513 and the data were analyzed by SPSS and AMOS softwares. The results demonstrate a significant direct relationship between economic and physical variables as well as social variables and consequently the same relationship between economic and the sense of satisfaction. The results also indicate a significant inverse relationship between environmental variables, which are effective on sense of satisfaction, and economic variables. The results of structural equation modeling (SEM) show that improvement in the condition of economic, physical and environmental variables, will improve condition of social variables and the sense of satisfaction in the studied neighborhoods. Furthermore, analysis showed that economic variables have more effect on social variables and eventually on the sense of satisfaction as compared to physical and environmental variables. Therefore, the negative effects of each four aforementioned factors could be decreased in the studied neighborhood through planning and application of culture-led regeneration policies. Accordingly the increase in the sense of satisfaction would improve the revitalization and sustainability in these neighborhoods.
Dr Alireza Mohammadi, Mr Reza Hashemi Masoomabad, Mrs Chnour Mohammadi,
Volume 21, Issue 63 (12-2021)
Abstract
One of the most important and urgent issues of urban planning is the equitable distribution of facilities, services and accessibility of citizens at the urban level. Economic and commercial centers, including banks and financial institutions, are one of the most important economic sectors of cities and can be sustained. Social, economic, physical, and environmental impacts of neighborhoods. The purpose of this study was to investigate the extent of citizenschr('39') access to commercial land use in Ardebil neighborhoods. Therefore, the present study is applied in terms of purpose and descriptive-analytical in nature. The statistical population of the study is 44 localities of Ardabil city. Spatial statistics models, Hot Spot Analysis, and GIS software were used for data analysis. Finally, regression function in Idrisi Selva software was used to analyze the correlation between commercial user and population as well as to determine the relationship and correlation of this user with other service users. The results show that in Ardabil neighborhoods there is inequality in terms of overall business use. As a result, the neighborhoods have high commercial use weights and high concentrations of hot spots in optimum condition, including areas 3 and 5 from zone 2, zone 7 from zone 1 and zone 6 from zone 3. Also, commercial low weight blocks and low concentrations of hot spots, which include areas 8 and 11 from zone 2, area 11 from zone 3, are lower in urban sustainability. Finally, based on the results of the research, some suggestions have been made.
Yousof Parsamehr, Hosien Mohammadi, Faramarz Khoshakhlagh, Saied Bazgeer,
Volume 22, Issue 64 (3-2022)
Abstract
In this study, in order to study the base temperature (minimum temperature for plant growth) at the degree of growth day (GDD), which is one of the important parameters in calculating the degree of growth day, first, the data required for the 2009-2017 statistical period of wheat production at the station Sararood was taken from the station. Then, after sorting and separating growth different stages, using four methods of calculating the base temperature (1 - minimum standard deviation SDgdd day, 2 - minimum standard deviation SDAY days, 3 - regression coefficient per day CRday, 4 - CV coefficient of variation) was the most suitable method for calculating the base temperature of growth in different stages of planting to wheat harvesting. The results showed that the most suitable method is the minimum standard deviation in GDD, which The base temperature was obtained from germination to full reach for different growth stages, 5/8, 0/38, 1/8, 2/6, 0/63, 2, 3/7, 9/7, 8/6, 11 degrees Celsius. By comparing different methods of calculating GDD, the most appropriate of method was the general method of calculating the degree of growth day due to the most of similarity to the station data. The degree of growth day in different stages was calculated based on their base temperature and the results showed that the calculation of the base temperature at each stage of the growth of the wheat was very accurate for GDD calculation and a precise estimate of GDD was obtained.
Reza Mohammadi, Zyinab Karkaabadi, Ghlam Reza Miri,
Volume 22, Issue 64 (3-2022)
Abstract
In this study, the actions and interactions between the city and the border were studied and explained. This research is applied in terms of purpose and in terms of descriptive-analytical method in library and field method. Data were collected through questionnaires and interviews. The statistical population consists of one percent of the population of border towns of Zahedan, Mirjaveh, Dost Mohammad, Khash and Saravan(N=8092). Using Cochran formula, 367 people were selected as the sample. Data were analyzed using Structured Analytical Model (SOWT-ANP). Findings and results showed.the most important effective factor on city-boundary relations is social factors with a mean of 3.55 and among weaknesses, Most affected were social weaknesses with a mean of 3.63 and among the opportunities examined, economic and managerial factors with a mean of 3.53 and Finally, they have the most impact on all types of threats, injuries and social threats with an average of 3.75. Also, the use of the method(F.ANP)in this study showed that the highest weight related to the threat factor was "management", which gained 7.9% of the final weight and took the first place. "Establishing economic, political and environmental security to deal with crises, attacks and ... (ST2)" is the most desirable strategy of deciding on the issue of zero value. And the strategy of "non-cooperation and interruption of cross-border relations with neighbors (WT1)" has been identified by experts as the worst strategy in this regard. Therefore, it can be said that among the factors (SWOT) "threats and challenges" in security and management dimensions is the most influential factor And the real gap between the "opportunities" is the key to improving the relationships between cities and territories. Also, from the standpoint of sustainable development management (institutional and structural) factors with the highest degree of importance and social, economic and environmental factors are ranked next.
Mehran Mohammadi, Naser Eghbali, Mahmood Rezaii,
Volume 22, Issue 64 (3-2022)
Abstract
This study examines the principles and criteria that lead to the adoption of a city - a case study: Sahebgharraniyeh Tehran district - is underway. The NLAS method has been used as the main research method and indicator in this research. In this research, we tried to evaluate the methodology of the NLAS method in Sahebgharriyeh neighborhood using the method of analysis of the hierarchical method of analysis of the NLAS method and to analyze the status of living in Sahebgharrani neighborhood based on the received responses and their analysis. Detailed analyzes based on factor analysis and hierarchical analysis method show that Sahebqaranieh's habitat status is based on three indicators of facilities and services, local economy dynamics and visual landscape situation and environmental pollution and its related components. After summing up Related items and calculation of general indices indicate that the local economy's dynamics indices with a mean of 0.96 and T-value of 968 / resulted in decreasing the viability of Sahebqaraniye neighborhood. But with 95 percent confidence, Sahebgharriyeh neighborhood can be considered as individual and social security indexes, identity and sense of place belonging, facilities and services needed, and the status of the visual landscape and the environmental pollution of the habitat.
Mr Alireza Mohammadi, Mrs Elahe Pishgar, Mrs Leila Hosseini,
Volume 22, Issue 66 (9-2022)
Abstract
According to statistics, about 300,000 disabled people live in Iran. There are about 25,738 disabled people in Ardabil province. This calls for attention to macro-planning for the disabled. This planning involves cognitive and spatial analysis of the status of the disabled people in different parts of the country. The purpose of this study was to analyze more precisely the situation of the spatial dispersion of the disabled and their relationship with different regions of the cities of Ardabil to address further the problems of accessing urban services and creating better living conditions for people with disabilities. In the present study, indicators such as age, gender, the status of residence, type and severity of disability, marital status, education and employment were analyzed using spatial statistics analysis. Also, the geographically weighted regression (GWR) model has been used to measure the relationship between the extent of development and disability. Findings of the research show that there is no relationship between the extent of development and disability in Ardabil province. The number of disabled males is higher than that of the disabled females in all cities. Disabled people in Ardabil province are young and 91.55% of them are illiterate and close to 96.74% of them are facing unemployment problems. In almost all cities of Ardabil province (73.98), there are severe to very severe disabilities and there is no specific order among different cities in the province of Ardabil regarding the type of disability, and various disabilities have been dispersed in the province.
Mrs. Atefeh Shahmohammadi, Dr. Ali Bayat, Mr. Saeed Mashhadizadeh Maleki,
Volume 22, Issue 67 (12-2022)
Abstract
Air pollution is one of the major problems in large cities, which can be harmful to human health and the environment. Isfahan is one of the most polluted cities in Iran.
Its geographic location and low wind speed, industrial activities, transportation, agriculture, and other human activities have created critical air pollution conditions for the city. Nitrogen dioxide is an important pollutant of air pollution, which is monitored using ground stations and satellite measurements. In this paper, daily data of nitrogen dioxide from Ozone Monitoring Instrument (OMI) satellite sensor, wind and surface temperature of Isfahan Meteorological Station data were used between October 2004 and May 2016. The average amount of nitrogen dioxide in the measured range is .The highest amount of nitrogen dioxide ( ) was observed in December and the lowest ( ) was observed in July. The standard deviation of the winter season ( ) is higher than the summer season ( ). The correlation coefficient of nitrogen dioxide with wind and temperature was -0.41 and -0.54, respectively, which indicates the higher importance of temperature in nitrogen dioxide changes. After the formation of the time series, the average monthly nitrogen dioxide content was determined using spectral analysis of least squares of statistically meaningful peaks corresponding periods. These statistically meaningful peaks corresponding periods have been eliminated from the mean monthly nitrogen dioxide time series, and with the linear fit on the residual time series, the trend has been calculated. The nitrogen dioxide trend for Isfahan is per year with 95% confidence.
Dr Hamid Reza Mohammadi, Me Mohsen Pakparvar,
Volume 24, Issue 73 (6-2024)
Abstract
In relation to the housing of the disadvantaged, the possibility of access to a suitable housing for every Iranian household in accordance with the household's needs in such a way that the housing concern does not exceed other areas of the household's life and stable and safe access to the household's housing is also guaranteed, showing the ideal vision of the housing sector in documentary studies, is related to disadvantaged groups. The purpose of this study is to achieve the set of strategies and the general form of realistic and effective programs in the field of housing support for the deprived and low-income groups, which, while determining the limits and type of government intervention in relation to housing and different economic groups, will make the target groups enjoy support programs faster. This study is based on the combined model of SWOT strategic analysis and QSPM strategic planning model and examines the findings of studies and the results of interviews with experts in the field of geography and urban planning. SWOT analysis showed that 1- Ignoring the lack of simultaneous use of the process of management and operation of low-income housing based on the participation of local social institutions and non-governmental organizations 2- Lack of necessary knowledge or disregard for the diversity of needs of the deprived and disregard for Special Characteristics of Target Groups 3. The imbalance between the benefits of different individuals in different groups in relation to support programs has led to the inefficiency of the policies of the deprived and the enjoyment of supportive housing for this group. "Empowerment programs" and "Attracting participation by exploiting local capacity and internal capacities by developing and diversifying empowerment", along with a general balancing policy to increase capacity in non-governmental sectors based on household participation. Faster households have support programs Provides housing and participation of all stakeholders in planning.
Keywords: development programs, government policies, housing for the deprived, SWOT analysis, QSPM model.
Mr Masihollah Mohammadi, Prof Behrooz Sobhani,
Volume 25, Issue 76 (3-2025)
Abstract
Relative humidity is considered to be one of the most important climatic parameters and atmospheric phenomena. The purpose of the present study is to evaluate the regional algorithms for estimating relative humidity using remote sensing data in Hormozgan province. To this end, MOD05 and MOD07 products were employed to estimate total perceptible water, air temperature, and sea-level pressure Additionally, MOD35 was used for cloud verification, , resulting in the identification of 2190 cloudless images with 95% confidence level for analysis. radiosound data of Bandar Abbas ststion and synoptic stations Covering entire Hormozgan Province. were used to evaluate the results. The findings demonstrated high accuracy of the algorithms and experimental model, with acceptable R² and RMSE values between Modis product and ground data. These results align well with ground station measurements. The province's climate was determined to be semi-desert with a long warm season and a short cool period. Further analysis revealed a strong correlation between sea-level pressure and total perceptible water (TPW) with the region's topography. Maximum TPW and sea-level pressure values were recorded in coastal lowlands, while minimum values occurred in the highlands. Based on zoning maps, Hormozgan province can be divided into four regions based on relative humidity: from very dry conditions with less than 20% relative humidity in the highlands to humid areas with over 65% relative humidity along the coast.
Mis Ameneh Alibakhshi, Dr Mohammadreza Pourmohammadi, Dr Rasoul Ghorbani,
Volume 25, Issue 77 (6-2025)
Abstract
In recent decades, one of the main challenges in studies related to regional development is the search for understanding the economic and cultural differences between the national and regional levels in order to predict the transition that will lead to regional development. One of the systems that plays an important role in regional development is the regional innovation system. To this end, the aim of the present study is to identify the key drivers of regional innovation in the Tabriz metropolis. In this regard, the study is applied in terms of purpose and descriptive-analytical in nature. Two library and field methods were used to collect the required information. The statistical population of the study includes 32 qualified individuals in the industry, university, and government sectors who were selected as purposive sampling. The data were also collected from the Miqmac software for analysis. The research findings show that out of a total of 71 influential factors, 13 factors include an appropriate productivity culture, laws and regulations, the existence of a teamwork culture between activists and established industry units, information and communication technology infrastructure, sufficient funding for university research infrastructure, higher education, patent programs, higher education policy, performance evaluation and payment system, financial support, a special and flexible tax system for research and development, and research centers.
Majid Goodarzi, Ali Ashkboos, Behnam Mohammadi,
Volume 25, Issue 77 (6-2025)
Abstract
The intermediate development approach posits that vacant lands and the deteriorating structures within urban areas should be prioritized for development rather than expanding into the periphery of cities currently under construction. Acknowledging this significance, the present article endeavors to identify and prioritize the barriers to intermediate development in Zabol, utilizing Chang's technique. This applied study employs a descriptive-analytical research methodology, incorporating both library research and survey research (field studies) for data collection. The statistical population for identifying the obstacles to intermediate development comprised all residents of Zabol city in 2023. The sample size was calculated to be 384 using Cochran's formula, and a purposive sampling method was employed to gather the data. The reliability of the research instrument was assessed using Cronbach's alpha coefficient, yielding a value of 0.80. The identification of obstacles was conducted through a sample t-test in SPSS, followed by the prioritization of the identified barriers. Data were collected from existing information about the city and through a questionnaire distributed to 20 relevant experts. Subsequently, the data were analyzed using Chang's technique (AHP-FUZZY). The findings indicated that the most significant obstacle to the implementation of the intermediate development plan for Zabol city is the economic index, which received a final weight of 483.
Rastegar Mohammadi, Mohammad Saligheh, Mohammad Hossein Naserzadeh, Mehri Akbari,
Volume 25, Issue 78 (9-2025)
Abstract
Extratropical cyclones, characterized by their frequency, duration, and intensity, serve as the primary drivers of mid- and high-latitude precipitation across the Mediterranean during the winter and autumn months. For this research, climatic variables obtained from the ECMWF network, featuring a temporal resolution of 6 hours and a spatial resolution of 0.25° × 0.25°, spanning from 1979 to 2016, were utilized. Additionally, precipitation data from four basin stations sourced from the Asfezari database for the same period were analyzed. Initially, geopotential height, temperature, humidity, and jet stream data for rainy days were extracted using MATLAB. Subsequently, a cyclonic center extraction algorithm was applied to identify cyclonic centers from the geopotential height data, based on the conditions that the geopotential height is at a minimum and the geopotential gradient is at a maximum. From the geopotential height matrix of rainy days (361×441×498), four distinct atmospheric patterns were identified through cluster analysis. The temporal and spatial frequency of these patterns, as well as the average temperature of cyclonic centers, were analyzed for the cold season months. The results indicated that the first pattern, identified as the Mediterranean trough pattern, is the most frequent, occurring 42% of the time. This pattern is characterized by the presence of a high-level system acting as a barrier, which deepens the low-level Mediterranean system and extends its axis toward the Red Sea. The interaction between low-level and high-level systems enhances instability, resulting in the highest precipitation levels among the identified patterns. Conversely, the fourth pattern, termed the western wind trough pattern, exhibits the lowest frequency at 10%. This pattern is characterized by a trough over the Caspian Sea; however, a high-level system in the southern region inhibits the entry of low-level systems, thereby confining cyclonic activity to the northern portion of the study area. Consequently, the isobars in the northern region assume a more orbital configuration, leading to a decreased influx of cyclones and, as a result, lower precipitation amounts compared to the other patterns. The analysis further revealed that cold-core cyclones accounted for 60% of occurrences in winter and 40% in autumn, while hot-core cyclones constituted 62% in winter and 38% in autumn. Notably, the frequency of hot-core cyclones increased relative to cold-core cyclones in winter, whereas an inverse trend was observed in autumn. Over the past decade, both the frequency and intensity of cyclones have diminished compared to the preceding two decades. In terms of cyclogenesis locations, the western part of the study area has consistently emerged as the most active region. Moreover, cyclogenesis activity exhibits a gradual increase from autumn to winter as the cold season progresses. These findings underscore the dynamic nature of extratropical cyclones and their significant role in shaping precipitation patterns across the Mediterranean region.
Mohsen Azizi, Hossein Mohammadi, Dariush Taleghani,
Volume 25, Issue 78 (9-2025)
Abstract
The aim of this research is to identify potential areas for autumn sugar beet cultivation in Golestan Province, Iran, based on temperature and precipitation parameters. Temperature (daily) and precipitation (annual) data from a 15-year statistical period (2006–2020) were analyzed using methods such as thermal potential diagrams, deviation from optimal conditions, phenology, and zoning of irrigation requirements based on annual rainfall. The results of the temperature evaluation using the thermal potential method, based on thermal thresholds of 0°C, 4°C, and 10°C, revealed that Inche Brun station has the highest cumulative thermal units, while Aliabad Katul station has the lowest. Analysis of the probability of late spring frost at the 95% confidence level showed that frost events occurring at the end of April in the central, eastern, northern, northeastern, and western parts of Golestan Province coincide with the phenological stages of root bulking and sugar accumulation in sugar beet. Based on the deviation from optimal conditions, Inche Brun station exhibited the lowest deviation (-20.64), indicating more favorable conditions for sugar beet cultivation. Phenological analysis identified Gonbadkavus, Bandar Turkman, Kalaleh, Inche Brun, and Bandar Gaz as the most suitable areas for autumn sugar beet cultivation in Golestan Province. Rainfall evaluations using the annual rainfall zoning map of Golestan Province indicated that, while there are no significant limitations in terms of rainfall and water supply for autumn sugar beet cultivation, the recent multi-year droughts necessitate additional irrigation to ensure optimal growth. In conclusion, this study highlights the potential for autumn sugar beet cultivation in specific areas of Golestan Province, taking into account thermal conditions, frost risks, and rainfall patterns. However, supplementary irrigation is recommended to address water shortages caused by prolonged droughts.
Phd Mohammad Mohammadi, Hossein Asakereh, Abdollah Faraji,
Volume 25, Issue 78 (9-2025)
Abstract
Today, energy consumption plays a decisive role in the qualitative and quantitative development of human life. One of the energy sources that aligns with development, economic prosperity, and the acquisition of climatic comfort is natural gas. This energy source, especially in cold regions of the country, is essential for providing thermal comfort and requires proper management. Effective management of this fossil energy source depends on awareness and accurate forecasting of its demand. For this reason, the demand for natural gas in Zanjan city, one of the cold cities in Iran, was studied and modeled. Two groups of data—weather elements and natural gas consumption—over a period of 9 years (2013–2021) on a daily scale were used for this study. CurveExpert software and regression methods were employed to model the demand for natural gas in the city. Based on the most accurate pattern, temperature was selected as the only independent variable in the chosen model. Polynomial regression, with a correlation coefficient of 0.94 (coefficient of determination of 89.03%), was selected as the final model. The analysis revealed that the percentage increase in natural gas consumption per one-degree decrease in temperature varies across different temperature ranges. From 22°C to 16°C, the highest percentage increase in consumption was observed, while from 0°C to -5°C, the lowest percentage increase per one-degree decrease in temperature was recorded. The turning point and the beginning of issues related to natural gas shortages in Zanjan city were identified to occur at temperatures below -7°C.
Sharifeh Zarei, Dr. Bohloul Alijani, Dr. Zahra Hejazizadeh, Dr. Bakhtiar Mohammadi,
Volume 25, Issue 78 (9-2025)
Abstract
This study investigates the most significant synoptic patterns associated with widespread snowfall in the eastern half of Iran. To achieve this, weather code data and snow depth records from synoptic stations in the eastern half of the country were obtained from the Iranian Meteorological Organization for the statistical period of 1371-1400 (1992-2021), focusing on the months of October to March. Days with simultaneous snowfall covering more than 70% of the study area were identified as widespread snowfall events. For the synoptic-dynamic analysis of these events, a classification method utilizing cluster analysis was employed. Maps of representative days were generated, including variables such as atmospheric temperature, moisture flux, geopotential height, vorticity, front formation, jet stream location, omega index, and meridional and zonal wind data. Additionally, trend analysis was conducted using the Mann-Kendall test. The results revealed that three primary synoptic patterns are responsible for widespread snowfall in the study area. These patterns include: (1) high-pressure systems over Siberia and central Europe coupled with low-pressure systems over eastern Iran; (2) high-pressure systems over western Iran paired with low-pressure systems over Sudan; and (3) high-pressure systems over central Europe combined with low-pressure systems over eastern Iran and Afghanistan. In all patterns, the intensification of meridional flows in the westerly winds, along with the formation of high- and low-pressure centers, creates blocking conditions that disrupt the westerly flow and promote upward air motion. The concentration of negative omega fields and positive relative vorticity advection, coupled with the positioning of northeastern Iran in the left exit region of the Subtropical Jet Stream, contributes to significant atmospheric instability and widespread snowfall in the region. Furthermore, the trend analysis indicated that, although there is no statistically significant trend in the number of snowfall days in northeastern Iran, the overall number of snowfall days has decreased over time.
Mis Zahra Asgari Gandomani, Mr Hamid Roodbari, Mr Yaghoob Mohammadi,
Volume 25, Issue 79 (12-2025)
Abstract
Green marketing has emerged as a significant area of interest, particularly among sports consumers who express concern regarding environmental issues and demonstrate a willingness to purchase eco-friendly products. Nonetheless, the actual sales of such green products remain below expectations. Consequently, this study aims to examine the influence of environmental factors—including attitude, concern, and sense of environmental responsibility—on the purchasing intentions of environmentally conscious sports consumers. The present survey study gathered data from 384 Iranian students through a seven-point Likert electronic questionnaire comprising 27 items. Participants were selected using a simple random sampling method. A total of 390 questionnaires were distributed, with 384 deemed valid for analysis. The data were analyzed using PLS software to assess the reliability and validity of the model, as well as to test the hypotheses of the structural model. Findings reveal that environmental attitude serves as a significant driver of consumers' green purchasing behavior. Furthermore, a statistically significant relationship was identified between environmental responsibility and green purchasing behavior. However, no statistically significant relationship was found between environmental concerns and green purchasing behavior. Additionally, the relationship between individual green values and environmental attitude, environmental concerns, environmental responsibility, and green purchasing behavior was statistically insignificant. To leverage these insights, companies should cultivate a positive image of environmental responsibility for their products through strategic branding initiatives. This approach could enhance consumer support among those who prioritize the purchase of environmentally friendly products.