درخت حوزه‌های تخصصی

The term of brownfield and its redevelopment has been considered extensively in the world urban planning literature. However, the nature of the brownfields and the differences between how they are created in countries have caused this term to be defined based on the contextual and typological conditions in each country, involving a wide range of lands. Meanwhile, despite the high importance of brownfield development in improving the quality of urban life, this issue is still neglected in the urban planning system of Iran. Therefore, this study is aimed to propose the definition of brownfield sits in Iranian cities and their typology as a policy to help reconsider them in urban development plans. After presenting the adaptive criteria extracted from the relevant literature, experts in this field were interviewed to determine the main categories of this concept in the country’s cities using the grounded theory qualitative method. Then, the rules and regulations related to the categories were reviewed to finally define this concept and present its comparative typology. The findings show that in Iranian cities, the brownfield sites comprise abandoned sites or lands including activities that pollute the environment, being incompatible with authorized urban activities. According to this definition, twelve types of brownfield sites can be identified in Iranian cities, in which the activities are incompatible with urban activities and they require intervention for development, and one type includes lands with no function at present, in which development has occurred previously.

Improving the thermal comfort of occupants in indoor spaces is one of the objectives of improving building cons truction techniques. In temperate and humid climates, window shutters are utilized as a protective shield during s torms. They can also block the view from the outside environment into the room. In this s tudy, we looked into how the inner climate condition was affected by various design patterns of these flexible envelopes. Vernacular architecture in humid and temperate climates can be used to describe different window shutter sizes and shapes. These shutters include both entirely rigid or perforated types. Window shutters are utilized as adjus table enclosures outside building windows that allow occupants to adjus t their position or location. Occupants in this area frequently open windows during extreme heat to ventilate the building and enhance the inner climate.In this regard, while using natural ventilation, we compared the twelve sample models with window shutters with various opening inlets to those without these flexible envelopes. We concluded after looking at several variables that flexible envelopes with an inlet area of 12.5% to 25% of the flexible envelopes produce better inner climate conditions.

The use of building regulations in architectural design has been a controversial issue for a long time. From the view point of critics, building regulations inhibit innovation, promote conservative design and are incapable of insuring design quality. From the defenders point of view, some professional mentalities of architects regarding building regulations are problematical and must be changed. The present research aims to illuminate the reasons for the above-mentioned tension between architectural design and building regulations. This is done by examining the structural match between architectural design and building regulations. Seeing from a designer point of view, the paper compares formal characteristics of building regulations with architectural design. Three general characteristics of building regulations are found in contrast to characteristics of architectural design. Building regulations are analytical in nature, while architectural design is a synthesis-oriented act. Building regulations are mainly based on a reductionist approach towards defining design problems and solutions, while innovation and originality are considered as fundamental values by most architects. And thirdly, building regulations are usually framed in a way that matches an evaluative mode of thought, while architects often have to work in a generative and predictive mode. These explain why architects from time to time feel frustrated with regulations. The paper continues to make recommendations to both architectural designers and regulators. To the designers some facts and points are stated to help them better understand the nature and performance of building regulations and guide them safely and positively use regulations in their design process. Addressing the legislators, the paper offers some recommendations to facilitate the use of building regulations in architectural design. Moving towards performance-based regulations, a broader involvement of information technology in building regulations, and production of designer-oriented guidance documents are some of these recommendations.

Perception and experience gained in the contemporary school could not help human beings' active learning. Totally, participation is the main element in active learning and thus, the active participation of students in the learning process is emphasized by education and learning in secondary schools. Given the importance of active learning, in this paper, the effective components in this type of learning has been identified. Among the three components involved in active learning, the component of participation in the learning process is selected and after a study of the model, two factors affecting the participation of children in the learning process are specified including social pattern and activation pattern of participation in the learning process. In this paper, the research uses a mixed method including a quantitative part and a qualitative part. The quantitative part uses a univariate T-test and the qualitative part uses a case-study method and content analysis to analyze the semi-structured interview. The study population in the quantitative part includes 279 male students of a secondary school in the city of Shiraz and the qualitative part includes 43 male students of the seventh grade of a secondary school in Shiraz. The results show that the majority of the respondents prefer a small class size. The findings emphasize the concept of participation in the learning process and introduce the factors of social interaction, individual and group activities, involvement and experience in the learning process for the indoor educational environment design and ultimately emphasize the factor of interaction as the most important criterion. 

In recent years, the debate over tall buildings and their impact on the environment has been raised greatly. On the one hand, the need to build tall buildings for various reasons such as: economical, functional, and environmental and on the other hand, High consumption of resources because of tall buildings is a challenge. In recent years, there has been six main approach in the design of high-rise buildings†: High-tech, Monolithic, Kinetic, Scenography, Media tic and Ecological. Ecological approach in the design of high-rise buildings, is realized by sustainable and green architecture. Ecological approach to architecture of high-rise buildings has led to not only the buildings less damage to the environment, but they also promote the quality of the environment. LEED standards at the late of twentieth century is used because of realization of these goals. In spite of a favorable environment for the use of renewable energy in Iran, there are four factors to reach green design: cultural, economic, technological and legal. Also in this condition there are some necessities to build green in high rise: saving energy (by solar panels, wind turbine, GHP system, CCHP), usage of green space in high rise, recycling water, healthy material and sustained construction, double skin façade, site development (green transport). In a case study of green high rise in Iran, renewal energies decreased usage of energy in building from 290kwh/m2 to 75kwh/m2. Also economic factors shows the rise of 1.2-1.4% in cost but 30-35% reduction in energy costs in green high rises. Compared to a conventional building, usage of renewal energies has 17.5% increase in Mechanical costs, 17% in Architecture & 37.5% in green spaces. With double skin façade, total cost increases about 8.2%-8.4% and without 1.2%-1.4%. In maximum condition it is 10% rise in cost compared with a conventional building.