درخت حوزه‌های تخصصی

Just like any other economic field, housing market has two basic foundations which are demand and supply. Its obvious that disequilibrum between these foundations, will drasticaly affect the housing affordability and can also lead to wide slump in many markets. That’s why, policy makers usually intend to stimulat the supply by means of providing low intrest loans, low priced land, etc. In this paper the correlation of private sector’s inclination to invest and supply housing with various criteria has been analyzed. Dependent variables deputed for investment inclination are investment volume and estimated floor area of started residential buildings, completed residential units and total floor area and number of residential units in permits issued. On the other hand, the independent variables used are liquidity, house and land price and accumulated deficit of residential units. Besides, the Hodrick-Prescott filter (HP) has been applied to time series data, in order to separate the trend components and the cyclic components. The result of analysis indicates that the liquidity has the most correlation and the accumulated deficit of residential units has the least correlation with the private supply inclination.

Various researches have introduced methods to use daylight in office buildings in the Middle Eas t zone, but none of them have ever considered the use of plant leaf arrangement, called phyllotaxis, as a comprehensive solution for harves ting daylight. The idea of the Phyllotaxis Tower has been raised for several years but the main ques tion of this research is whether using the phyllotaxis model is capable of exploiting daylight in high-rise buildings or not. So, in response to this ques tion, the main aim of the research was set to evaluate daylight efficiency in high-rise office buildings by presenting an exemplary and phyllotaxis-inspired design. The research method is encompassed several s teps including, s tudying the literature on the subject firs tly, then modeling a prototype building based on the Biomimicry Problem-Based approach, and eventually computer simulation to evaluate the performance of the proposed building. The results show that office units can get daylight illuminance of 500 lux at 50% of operating time per year in addition to proper performance on four single days of different seasons of the year. Furthermore, the sample building obtained label B of energy consumption from S tandard No. 14254 presented by the Ins titute of S tandards and Indus trial Research of Iran, which has been compared with the energy label of 45 office buildings in the same location and same climate conditions, based on the figures are defined on the aforementioned s tandard and has the bes t performance among them.

Today, social participation is considered as a crucial element in renewing urban life and enhancing resilience in confronting different crises. Regarding the troubles on the one hand and the limitations of tools and financial capacities of urban management on the other hand, districts with worn textures are taken as one of the main factors in decreasing the quality of life and increasing the vulnerability of cities. so, the most effective approach to choose for facing the shortcomings and imperfections is the participatory approach. This research aims to investigate the empowerment of local communities and the establishment of participatory management with a comprehensive practice along with the participation of citizens for renewing and reviving the worn urban texture of Zeinabieh district of Isfahan. This study was done by survey, documentary and analytical research methods. The results show that the participation of the residents for regeneration and renovation was somehow low in the mentioned district mainly due to their mistrust in the project executors. Having a feeling of satisfaction in the activities of the authorities and confiding in them is an element which paves the way for residents to boost their level of participation in regeneration and refurbishment of old textures. For this reason, the empowerment of residents was proposed as the most appropriate pattern for public involvement in the worn texture of the area under study. The use of such model creates the process of programming as well as the top-down decision makings which put emphasis on community indexes and accelerate citizen participation and confidence. Empowerment model, in practice, in addition to promoting the spatial-physical resilience, enhances the development of cultural and social resiliency through the reinforcement of social relations and the trust among the citizens on the one side and between the citizens and urban management on the other side.