Ahmad Nameni; Seyyed Mostafa Tayebi Sani; Ali Fahimi Nejad; Bagher Morsal
Volume 18, Issue 46 , March 2020, , Pages 137-158
Abstract
The city of Tehran is known as one of the most polluted cities in the world which is due to the inadequate urbanization, developmental and heterogeneous system without evaluation. In this situation, if a reliable model can be predicted for the future status of pollutants in the city, a more accurate ...
Read More
The city of Tehran is known as one of the most polluted cities in the world which is due to the inadequate urbanization, developmental and heterogeneous system without evaluation. In this situation, if a reliable model can be predicted for the future status of pollutants in the city, a more accurate understanding of the pollutants can be found in the context of sustainable urban management. The study is to identify the air pollutants in relation to the sports complexes of eastern Tehran (districts 4, 7, 8, 13). For this purpose, data from pollution sensing stations around the region were interpolated for the last 6 years by Kriging method. As a standard, the Air Quality Index (AQI) was used. Layering overlay was performed using ArcGIS 9.2 software. The results showed that the variability of the concentration of this pollutant in different stations is different and the distribution of pollutants in the study area does not follow the same pattern. The most severe degree of pollution was registered at the Crisis Headquarters Station (90.49). The maximum number of clean air days at the Golbarg Station (488 days) and the lowest at the Chief of Staff (160 days). Also, the headquarters of the crisis has the highest number of days of "unhealthy" and "unhealthy weather" for sensitive groups. In the meantime, the station has less number of infected days. Finally, 22 sports complexes are exposed to severe air pollution in the study area.
Maziar Hatami; Seyyed Mostafa Tayyebi Sani; Ali Fahimi Nejad; Bagher Morsal
Volume 18, Issue 44 , September 2019, , Pages 101-114
Abstract
The study is to evaluate the success rate of Management Information System in the Ministry of Sports and Youth based on the basis of Delon and McLean model. This research is descriptive-survey and it is applied in terms of purpose and is done in a field and questionnaire. Using the rule of thumb for ...
Read More
The study is to evaluate the success rate of Management Information System in the Ministry of Sports and Youth based on the basis of Delon and McLean model. This research is descriptive-survey and it is applied in terms of purpose and is done in a field and questionnaire. Using the rule of thumb for the analysis of structural equations, the minimum sample size was 320. So, 350 questionnaires were distributed among employees and managers and finally 329 questionnaires were returned. A Delun and McLean (2003) questionnaire was used to collect data. To test reliability, the correlation coefficient of test-post test and Alpha-Cronbach's coefficient were obtained 0/82 and 0/90, respectively. To assess the validity of the questionnaire, formal and content method was used. For data analysis, Pearson correlation coefficient and confirmatory factor analysis were used to present and validate the model in Amos 20 and SPSS software. Correlation results showed that there is a significant correlation of 99/99% between the main correlation variables, which allows for further analysis. The results showed that the quality of the information system, the quality of information and the quality of the services of the Ministry of Sport were related to the user's use of the system and user satisfaction and the quality of the system is related to net benefits, and the quality of information and service quality with net benefits through user's use and satisfaction Users are affected by the system. Therefore, it can be concluded that the success of the management information system based on the Delon and McLean model can be effective in expediting and improving efficiency.
