درخت حوزه‌های تخصصی

One of the most traditional architecture and urban planning patterns is bazaar. The aim of this paper is studying social, economical and architectural features of traditional bazaars. The claim of this study is that they are significant relationship between social and economical values of bazaars with their architectural values. Bazaar usually is located along the main routes of the city and extended to the city center. Most activities and exchanges of city happen in the bazaar. In the past, the bazaar was a place for the transfer of customs, traditions, ideas and practices of social behavior and social life. Bazaar as a social media and social network, bazaar a source of social capital, forming micro funds are the greatest economically and socially achievements in the traditional bazaar. Wakf in addition has socially and economically important functions in day-life and urban activities, also has in physical aspects vital roles in shaping Islamic cities especially Iranian cites and bazaars. One of the most important features of bazaar’s set is formation guild organizations, socio-political, and the founder of this organization, which may be composed of civil society. Most of these activities and values are related to architectural and physical features of bazaar.

This study aimed to identify and test expectancy motivational model as a theoretical framework to explain the reasons motivating expected information consumer’s behavior for the selection and use of document delivery services of Shahid Chamran University, Ahvaz. In this study, explanatory survey method was used. In order to test the hypotheses and analysis of model’s data, covariance structural equation model-driven approach was used by Amos software version 23. Findings of analytical study shows that information consumers motivational model focusing on the three paths of expectancy, instrumentality and valence, and on the basis of the VIE model, is able to explain information consumers’ behavior in the document delivery services of Shahid Chamran University; therefore, the VIE model in this study was confirmed. Also according to the proposed table (Newstrom & Davis, 1968), motivation level of information consumers in their behavioral motivation to use document delivery services of Shahid Chamran University of Ahvaz was predicted to be average.

Hail phenomenon is one of the hazardous weather phenomena that can make the highest amount of damage to farms, gardens, cars, rooftops, etc. in a very short time (a few minutes), depending on the diameter of the particles. One of the best ways to study this devastating climatic phenomenon is the use of atmospheric instability indices. The indices which are calculated with the help of radiosonde data give a fairly comprehensive vision regarding the occurrence of such phenomenon. In this study, the incidence of moderate to severe hail is investigated in the period of 1990-2010. First, the atmospheric codes related to hail phenomena were applied to extract the data, then radiosonde data in intended time were received and applying the RAOB software, the physical status of atmosphere was studied. In the studied period, two hail examples were reported on November 27, 2008 and December 5, 2008. In the first instance of hail that occurred on November 27, 2008, the status of some indicators was calculated and it was found that LCL was at an altitude of 284 meters, CCL at an altitude of 1582 meters, LFC at an altitude of 6230 meters, the ice surface at an altitude of 3278 meters, the LI index was -0.2, the K index was 25.7 ° C, and PWC was 28 mm. In the above mentioned conditions, there was a hail with a diameter of 25.4 mm. In the second instance of hail that occurred on December 5, 2008, the status of some indicators was calculated and the results showed that LCL was at an altitude of 280 meters, CCL at an altitude of 1762 meters, LFC at an altitude of 2271 meters, the ice surface at an altitude of 2771 meters, the LI index was -1.4, the K index was 27.1 ° C, and PWC was 23.6 mm. In the above mentioned conditions, there was a hail with a diameter of 3.6 mm. Given that in many ways, the status of most atmospheric indicators in the two above examples of hail were close to each other, it turns out that in similar circumstances, the greater the distance the ice level gets to the summit of cloud, the greater is the probability of hails larger in diameter. The value of this distance for November 27, 2008 was at approximately 6384 meters and for December 5, 2008, it was at about 5012 meters.