فهرست مطالب elham mansourian

About a third of the total energy consumption in developed countries is summarized in the housing and building sector, while the provision of cooling, heating, and air ventilation. In this regard, air ventilation is a significant issue and a large part of the energy consumption in the building is dedicated to this issue. Various methods for natural ventilation have been exempted from sustainable architecture, one of which is solar chimneys. A solar chimney is a type of passive solar heating and cooling system that can be used to regulate the temperature of a building as well as provide ventilation. Like a Trombe wall or solar wall, solar chimneys are a way to achieve energy-efficient building design. Essentially, solar chimneys are hollow containers that connect the inside part of the building to the outside part of the building. Various research have been conducted in connection with the analysis of solar chimney performance; meanwhile, there has been no independent research regarding the effective depth of the solar chimney in creating ventilation in a closed space.

Accordingly, in this research, the issue of the effective depth of the space in improving the ventilation performance of a room equipped with a solar chimney is investigated. The research method used in this article includes two qualitative and quantitative parts. In this research, assuming that the depth of the space affects the amount of ventilation, the depth is considered as an independent variable, and the amount of airflow is a dependent variable. For this purpose, 7 rooms with fixed width and variable lengths were selected as case studies. The length of the rooms fluctuated from 3 meters to 9 meters, and the width of the room was considered a fixed value of 3 meters in all cases. A solar chimney with a height of 1.85 m, a width of 1 m, an air gap of 0.28 m, and an angle of 75 degrees is placed on the roof of the chamber in all the case studies. After the samples were selected, they were simulated in the Autodesk CFD soft wear. To measure the accuracy of the calculations, the validation of the software was done, and the result of this part was a 4% error between the numerical results and experimental research.

The results of this research showed that the ventilation speed has a direct relationship with the depth of the room. The most optimal dimensions of the room in terms of room ventilation are 4x3 and 5x3. Also, in the standing height, the minimum ventilation speed is seen in the end part of the spaces, and in the sitting height, except for the beginning and end of the room, the lowest speed is at one-third of the end of the room.

Urban green spaces include different sections and have divisions that in this study we examine the monuments of Yasuj city. The purpose of this article is to study the factors and influential components including aesthetic, physical, emotional, functional components as well as other components such as texture, form, shape, color, etc. on improving the quality of urban green space. Is the city of Yasuj).In this study, by examining the components, we want to study their impact on the quality of urban parks. The research method in this research was field type, after statistical analysis of the findings which was prepared through a questionnaire and collected using SPSS software.According to the research findings, the emotional component has the greatest impact on improving the quality of the studied urban space. Based on the findings, the use of green space design capacity in creating a flexible and multi-functional space in the study area to improve its quality is the first priority.

The purpose of this article was to write about the importance and impact of sidewalks in improving the quality of life and increasing vitality and urban interactions and analyzing the relationship between the quality of urban space on sidewalks (vitality, diversity, permeability, readability, security and social interactions). The research is of descriptive-analytical type and objective observations and its contents have been collected through documentary and non-documentary methods and the article has been discussed through maps, photos and measurements with meter tools.The results showed that sidewalks play an important role in the quality of life and urban spaces, vitality and urban interactions of citizens. Proper handling and design of sidewalks will increase the presence of citizens in the urban space. This will increase the sidewalk and reduce the excessive use of personal vehicles. Components affecting the presence of people in urban areas and the use of sidewalks include safety and security, vitality, readability, access to land uses, proper access for the disabled and physically disabled, visual attractiveness, etc., which are observed in the presence of More and more people are found in urban spaces and sidewalks.

Most of research projects are in the form of theses and an important part of assessing their research values is based on the type of study chosen and conducted. This survey aims to evaluate the medical residents’ theses at Guilan University of Medical Sciences in terms of methodology and other research components. To determine the frequency of study types adopted in medical residents’ theses In this retrospective-descriptive study, 101 medical theses from April 2005 to March 2009 have been assessed in terms of type of study, the research design, acceptance in the domestic and foreign journals and congresses. Of the 101 of theses, descriptive studies account for 52 theses (5/51%), analysis of patients 43 patients (6/42%), and evaluation of diagnostic tests 6 theses (9/5%). A total of 68.3% of the manuscripts were published in journals (41.6% in national journals, 5% in foreign journals and 11.9% in both). The lowest number of publications was in 2006 (12.8%) and the highest was in 2009 (24.6%). A total of 47.5% of the manuscripts were presented at congresses (30.7% in national congresses, 13/9% in foreign journals and 12.9% in both). The lowest publication rate was in 2006 (12.8%) and the higheat in 2005 and 2009 (22.9%). It seems that, until the year 2009, the theses had a growing trend in the number, publication in journals, presentations at congresses and the preference for analytical studies.