the present paper studies the objectives and functions of constructing the new towns before and after the revolution in iran. before the revolution, new towns were established based on political – bureaucratic objectives, for the operation of huge oil resources and affiliated industries, to accommodate the workforce in industrial complexes, to implement the policy of regional decentralization...

introduction promoting villages to towns is among the prominent characteristics of urbanization in few past decades and remains as a major challenge facing managers, policymakers and urban planners, particularly in developing countries. in iran, one of the growing impacts of rapid urbanization on the spatial structure of country is growing the number of urban centers via transformation villages...

Economic and social changes in recent decades led to regional imbalance and inordinate concentration of facilities in some parts and bereavement of other parts. We need to district and regional planning which its objective is providing an appropriate model for balanced distribution of services according to population of settlements or spatial balance in the region. The topics of sust...

extended abstractintroductionone of the basic challenges of governments, especially in developing countries, is to organize the desired national spatial structure in the changing urbanization. such a structure allows us to divide economic and social functions in the urban and regional hierarchy in a balanced manner. in most provinces and territories of iran, the urban hierarchy has formed compl...

The chapter presents a spatial interaction entropy model that addresses the dynamics of urban growth using sites from the Late Uruk period in southern Mesopotamia as examples. The model addresses to what extent geography, transportation, and factors that make locations attractive for trade and settlement affect why some settlements grow while others stabilize or diminish in size through time. T...

The aim of this work was to determine the natural fluoride concentrations in public water supplies in Piauí State, Brazil, in order to identify cities in risk for high prevalence of dental fluorosis. For each city, two samples of drinking water were collected in the urban area: one from the main public water supply and another from a public or residential tap from the same source. Fluoride anal...