Analysis of Sustainable Housing Indicators and its Role in Improving Physical Security)Case study: District 17 of Tehran Metropolis(

Physical security in residential areas and neighborhoods has led to an increase in the quantitative and qualitative level of well-being and provides the basis for the formation of residents' interaction in the urban environment. However, usually in urban environments, sustainable housing plays the greatest role in increasing and realizing physical security. In this regard, the aim of this research is to investigate and analyze the indicators of sustainable housing and their role in the realization and promotion of physical security in the neighborhoods of the 17th district of Tehran metropolis. The research method in this study is descriptive-analytical and practical in terms of purpose. The method of data collection was done in the library and field, and the sampling was purposeful, and 20 urban specialists and experts were selected for questioning. Weighting and determining the value of subjective indicators (33 sub-indices in 6 categories of equitable distribution of residential services, efficient transportation, vitality, healthy environment, fair housing, and dynamic cultural heritage) and objective (14 sub-indices in 3 categories of design-architecture, technical indicators - Engineering and accessibility), using the methods of pairwise comparisons and fuzzy AHP, and the desirability of each of the indicators and their role in physical security, separated by localities, are displayed in the GIS environment. The results of the research showed that Yaftabad and East Abuzar neighborhoods have a favorable situation in terms of physical security with weight (0.132 and 0.084), respectively. Golchin (0.078) and Boloursazi (0.076) locations are in acceptable condition; Bagh Khazaneh (0.074) and Emamzadeh Hasan (0.073) neighborhoods are in average condition; The localities of Jalili (0.066), West Abuzar (0.064), Zehtabi (0.063) and Emam Sajjad (AS) (0.062) are in poor condition and the localities of Vesfanard (0.060), Azari (0.058) ), Moghadam (0.057) and Zamzam (0.050) are in unfavorable conditions.

At the same time, housing is the main factor of people's socialization towards the world and the major and decisive capital in the social organization of space, which plays a very decisive role in the formation of individual identity, social relations, and collective goals of people. Housing is more than a physical structure, it is an institution with a multi-dimensional function, which has different spatial, architectural, physical, economic, social, financial, psychological, and medical dimensions. Housing is the most important element of the city, and in the sustainable development of the city, paying attention to its sustainability is known as its most essential aspect. Therefore, the relationship between sustainability and housing is two-way. In this regard, man has different needs during his life, which he plans to fulfill. In today's world, in terms of the expansion of urbanization and the special interactions of citizens with each other, as well as from the perspective of urban design and architecture, security in cities has gained special importance. The need for security in cities has brought spatial and physical reflections as an important and vital principle. Therefore, establishing security in the urban structure and giving citizens a sense of security is increasingly important. In fact, the basis of urban life is based on this axis.

The research method used in this study is descriptive-analytical and practical in terms of purpose. The method of data collection has been carried out in the form of the library (examination of documents, statistics information, and research related to the subject) and field (interview and questionnaire distribution). Sampling was purposeful and 20 urban experts were selected for questioning. In this research, to analyze the indicators (two categories of mental and objective indicators); In the analysis of subjective indicators, scoring was done using the opinions of specialists and urban experts, and finally, using the "pairwise comparison" method, the indicators were weighted, and the effects of each of them (indicators) were determined with different intensity and weakness in the localities. For the objective indicators, weighting and ranking were done using Fuzzy AHP, and the layers related to each of their dimensions and sub-indices were prepared in the GIS environment, finally, the neighborhoods in terms of the impact of sustainable housing on physical security were divided into neighborhoods and stratified into three Weak, medium and favorable categories were identified.

The results show from the objective indicators aspect, in terms of design-architecture dimension indicators such as the number of building floors, area (smallness), population density, indefensible spaces (lack of lighting), and residential density; The neighborhoods of the 17th district of Tehran are not very different from each other. Only "Yaftabad neighborhood" is in a favorable situation in this regard. "Emamzadeh Hasan neighborhood" is also in an average condition and the rest of the neighborhoods are also in an unfavorable condition. In this regard, the physical texture of area 17 has the following characteristics: extremely worn and dense, incoherent and disjointed, irregular in terms of the type of use and having strong interference of use, having granularity with an increase in fine-grained elements, compactness of the texture and their location on Mainly narrow and long passages, high wear and tear of residential and non-residential units, construction of buildings using non-resistant and non-standard materials, old buildings, etc. Finally, by scoring and summarizing the weight of all the indicators related to the physical security of the neighborhoods of the 17th region, they were categorized into 3 categories with favorable, medium, and weak spectra. The localities of Yaftabad and East Abuzar, Boloursazi, and Golchin have a favorable situation in terms of physical security. Bagh Khazaneh and Eemamzadeh Hassan and Jalili neighborhoods are in average condition and West Abuzar, emam Sajjad, Zehtabi, Azari, Moghadam, Wesfanard and Zamzam neighborhoods are in unfavorable conditions. From the metal indicators aspect, "Azari, Moghadam, Golchin, Wesfanard and Zehtabi" localities are in poor condition; "Boloursazi, Eemamzadeh Hasan and Yaftabad" localities are in average condition and "Bagh Khazaneh, East Abuzar , West Abuzar, Emam Sajjad" localities ), Jalili and Zamzam" are in the ideal state of stable housing in order to achieve physical security. It should be noted that this classification is based on the scoring of selected experts on subjective indicators.

In this research, after stating the features of sustainable housing in the target area and checking the normality or abnormality of the indicators, the most important features affecting the promotion of physical security in the said area were determined. In this regard, the selected indicators were divided into two subjective and objective categories. Subjective indicators were scored and validated by urban experts. For this purpose, 33 sub-indices were identified and extracted in 6 categories of fair distribution of residential services, efficient transportation, vitality, healthy environment, fair housing, and dynamic cultural heritage, and the "paired comparisons" method was used to weight and normalize them. Also, in the objective indicators section, 14 sub-indices were selected in 3 categories of design-architecture, technical-engineering, and accessibility indicators, and for their weighting and normalization, the fuzzy AHP model was used in the GIS environment. The results showed that the neighborhoods identified based on the degree of desirability of having stable housing in order to achieve physical security based on subjective and objective indicators are very different from each other.