This paper analyzes redistribution by municipalities in a metropolitan area using the classical model of residential land use in a monocentric city. Crossing bid rent curves lead to spatial segregation of household types which might shield high-income households from redistribution by municipalities. If rich households live farer away from the central business district than poor households, the...

the collapse of the soviet :union: had unpredicted effects on its neighboring regions such as central asia. these conditions provided a situation for the powers such as united states and russia to have a greater influence on central asia, and also to fill the absence of the power found by the collapse of soviet :union:. after september 11, 2001, united states of america, following the strategy ...

introduction: air pollution is one of the problems of the recent century caused by vehicles, industries and other urban activities. the city of yazd faces air pollution due to its high population, vehicular traffic and industrial places around the city. one of the important parameters of air pollution is suspended air particles that have harmful effects on the health of people, plants and objec...

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during the study on rust mycobiota of central alborz, several rust infected specimens belonging to salicaceae family including populus and salix species were investigated. populus nigra, p. euphratica, saix alba and s. excelsa were infected by various melampsora species. uredinial (ii) and telial (iii) stages of rust were present on infected plants. according to morphological characters, five f...