فهرست مطالب emad amiri

The night's identity of the city is an important part of the identity of a modern city. Undoubtedly, Tehran, as the most populous city in Iran, has bright nights, whose residents need the city to be alive for more hours to reach the urban space so that they can be safe and away from the worries of living with friends and Make their families feelOf course, it should be noted that if these needs are to be met in the bright and safe streets of Tehran, it must be done with the full supervision of those in charge and the formulation of laws in urban policies, because in this case there is no guarantee that these places are harmful. is not Therefore, considering the importance of nightlife, it can be acknowledged that the capital of Iran needs to recreate nightlife because in terms of social, economic and cultural structure has a direct impact on the lives of citizens. The main purpose of this study is to pay attention to the role of tourism and leisure in the vitality of urban spaces with a focus on nightlife and social vitality in District 12 of Tehran. This study shows that tourism and leisure play an important role in the vitality of urban spaces in District 12 of the municipality, which can create nightlife spaces in District 12.The research method of this research is based on the nature of the research problem, descriptive-analytical method and the type of applied-developmental research. To collect the data, library and field methods have been used and by identifying the effective variables on the problem that have been obtained through the theoretical foundations of the dissertation and study experiences, first appropriate indicators for component analysis have been set and then data analysis using a questionnaire. In the present study, for collecting information from library methods and based on the information available in the heart of Tehran.

Drying is one of the most common techniques for agricultural production processing which improves shelf life of the final product. Corn (Zea mayz) is a high nutritional value food and is an essential source of minerals and vitamins; thus it makes a substantial contribution to human nutrition. In this study the effects of hot air drying temperature (35, 50, 65 and 80°C), drum rotation speed (2, 6 and 10 rpm) and final moisture content of kernels (13 and 17 %) at constant air velocity (0.8 m/s) on drying time, percentage of broken kernels of corn, and percentage of crack of corn kernels were investigated. For this propose, the laboratory batch rotary dryer is designed. The results showed that increasing the temperature form 35 °C to 80°C, the percentage of broken grains and percentage of cracked grains increased and the drying time was decreased. Increasing the rotating cylinder rotation speed increased the drying time and the percentage of broken grains, but not significant effect in percentage of cracked grains.. The drying time, percentage of broken grains and percentage of cracked grains is lower in grain with 17 % db than the sample with 13 % db To obtain the desired quality parameter, the optimum drying for production of dried corn was determined as 65°C for 2 rpm and 17 % db.

This research carried out in order to corn kernels drying by using a discontinuous rotary drum dryer. This research evaluated the effect of drying air temperature and velocity of the rotating cylinder parameters on the drying time, breakage percentage, cracking, burn kernels and the disruptive energy of corn kernels. For this purpose, a batch dryer rotating cylindrical drum rotation is designed and developed. Intake air temperature parameter Was considered at four levels of 40, 60, 80 and 100 °C and the drum rotation speed at three levels of 2, 6 and 10 rpm. The results indicated significant interaction effect of temperature and speed rotation cylinder on maize grain drying. The lowest time kernels corn drying and the cylinder rotation speed was at 100 °C and 2 rpm, respectively. With increasing temperature of dryer from 40 to 100 °C, grain drying time is reduced to less than a quarter but; with increasing rotation speed of the cylinder drying time was increases. During the drying process, the interaction of temperature and rotation speed of the cylinder has no significant effect on broken kernels-corn. The maximum percentage of broken grains of corn is in 10 rpm rotation speed. Interaction of temperature and rotation speed of the cylinder is significant at the one percent level on cracked and burned grains. The More of the cracks and burn is in 100 °C temperature and 2 rpm of rotation speed.