the effect of underground cavities in site seismic response was studied over the subway tunnels that are under construction in the city of karaj, using ambient noise measurements as well as numerical modeling. the idea for this research comes from the observation of differences in experimental site transfer function, calculated on more than 100 locations of the city, for the areas near the unde...

A novel, car based, measuring system for estimation of general public outdoor exposure to radiofrequency fields (RF) has been developed. The system enables fast, large area, isotropic spectral measurements with a bandwidth covering the frequency range of 30 MHz to 3 GHz. Measurements have shown that complete mapping of a town with 15000 inhabitants and a path length of 115 km is possible to per...

the present paper explores migration phenomenon and the impacts of which on immigrant households to tehran city. the aim of the study is to determine the scale of economic, social and cultural changes among the immigrants. through this study, the scale/rate of affectability of migrants is determined in terms of different social, ethical, welfare and attitudinal frames as compared with the nativ...

introduction one of the critical issues associated with sustainability in the twenty-first century is how cities are growing and developing in the space. rapid urban growth and physical development of cities cause disintegration of the spatial organization of cities and consequently spatial inequality between urban spaces. this phenomenon can be considered as spatial segregation or fragmentatio...

in the spring and summer of 2012, a survey was conducted to study the biological control agents of field bindweed (convolvolus arvensis l.) in the city of mashhad and its suburban areas. lepidopteran larvae were observed feeding on the leaves of field bindweed. the larvae were collected and reared in an insectarium and later sent to dr h. alipanah (iranian research institute of plant protection...

extended abstract introduction disproportionate development of cities and extended accumulation cause the phenomenon like as informal settlements. and the results of developing the informal settlements are forming different damages of economy, society and environment. results of thisseductions are inability of city a spaces in answering to largess necessity. generally this unbalance urban grow...

Surficial sediment samples were collected from Hochiminh City canals, the Sai Gon-Dong Nai River, and its estuary, one of the most predominant industrial areas in Hochiminh City, southern Vietnam, for determination of selected persistent organic pollutants (POPs). Contamination pattern was as follows: PCBs > or = DDTs > HCB > CHLs > HCHs. Concentrations of PCBs and DDTs ranged from 0.50-150 ng/...

climate change impacts are seen within growing numbers of cities in low- and middle-income countries, so there is growing interest in the adaptation and mitigation plans and programs put forward by city authorities. this paper aims to provide a better understanding of the constraints which cities face them in this subject by analyzing the case of tehran. city has a commitment to decentralizatio...