منابع مشابه
New Highways as Economic Development Tools:
Stimulating economic growth and development in rural and economically lagging regions is the goal of several federal and state highway programs. This paper examines the effectiveness of highway investment as an economic development tool. A quasi-experimental matching method is used to examine the effects of interstate highways on counties which obtained links during the period 1963-75 or are in...
متن کاملHow To Franchise Highways
is one of ten regional units mandated by Congress and established in Fall 1988 to support research, education, and training in surface transportation. The UC Center serves federal Region IX and is supported by matching grants from the U.S. Department of Transportation, the California Department of Transportation (Cattrans), and the University. Based on the Berkeley Campus, UCTC draws upon exist...
متن کاملPlanning for County Highways
IN T R O D U C T IO N More than 76,000 miles of roads are under county control in Indiana—a responsibility for county road authorities which almost defies measurement. The magnitude of the task is indicated, however, by two factors: annual expenditures, which in 1958 totaled over $40 million, and employment, which totaled several thousand persons. This responsibility places great problems on th...
متن کاملHighways for mRNA Transport
Two new studies reveal the role of microtubule polarity in the asymmetric localization of mRNAs. In this issue of Cell, Zimyanin et al. (2008) show that the asymmetric localization of oskar mRNA in fruit fly oocytes results from a slight bias in the direction of its transport. Meanwhile, Messitt et al. (2008) reporting in Developmental Cell find a subpopulation of microtubules that is critical ...
متن کاملConstructing Optimal Highways
For two points p and q in the plane, a straight line h, called a highway, and a real v > 1, we define the travel time (also known as the city distance) from p and q to be the time needed to traverse a quickest path from p to q, where the distance is measured with speed v on h and with speed 1 in the underlying metric elsewhere. Given a set S of n points in the plane and a highway speed v, we co...
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ژورنال
عنوان ژورنال: Public Health Reports (1896-1970)
سال: 1957
ISSN: 0094-6214
DOI: 10.2307/4589676