"This paper evaluates the influence of residential density on commuting behavior across U.S. cities while controlling for available opportunities, the technology of transportation infrastructure, and individual socio-economic and demographic characteristics. The measures of metropolitan and local density are addressed separately.... Regressions are conducted to predict commuting time, speed, an...

The 2009 H1N1 influenza pandemic provides a unique opportunity for detailed examination of the spatial dynamics of an emerging pathogen. In the US, the pandemic was characterized by substantial geographical heterogeneity: the 2009 spring wave was limited mainly to northeastern cities while the larger fall wave affected the whole country. Here we use finely resolved spatial and temporal influenz...

one of the farmers' marketing decisions is how to sell their products to the market. they sell their products in different ways, for example pre-sell, local dealers and wholesalers,. this paper aims at investigating citrus distribution channels and evaluation of factors affecting the choice of each channels by mazandaran ‘s producers. the data was collected by simple random sampling method. 252...

The direction of the upward light emission has different polluting effects on the sky depending on the distance of the observation site. We studied with detailed models for light pollution propagation the ratio bH bL , at given distances from a city, between the artificial sky luminance bH produced by its upward light emission between a given threshold angle θ0 and the vertical and the artifici...

Creating cities that promote sustainable lifestyles is a complex and far reaching process. One of the most important components of sustainability on an urban scale is the need for an efficient public transportation system, which provides enough convenience that, combined with walking, can be more desirable for residents to use over driving a car. Vehicular traffic congestion is one of the great...

Bus rapid transit is an innovative, high capacity, lower cost public transit solution in metropolitan cities. Idea is to dedicate lanes for quick and efficient transport of passengers to their destinations. In the present investigation the environmental impact assessment of bus rapid transit  in Tehran metropolitan city is brought out. For this purpose bus rapid transit Lane No. 10 is investiga...

This article presents a Granger causality analysis of the coupled development of population and streetcars in the Twin Cities of Minneapolis and St Paul Historic residence and network data were assembled for 1900–1930, and linear crosssectional time-series models were estimated at both a tract and block level using these data. It is found that, in contrast with transportation systems that were ...