منابع مشابه
Experiential hierarchies of streets
Mental representations of spatial knowledge are organized hierarchically. Among people familiar with an urban environment, common spatial knowledge from these spatial mental representations enables successful communication of place and route descriptions, consisting of hierarchically-ordered references to prominent spatial features, such as streets. The more prominent a street is, the more like...
متن کاملBetter Utilization of City Streets
City streets in this country represent an annual capital outlay of $3,133 billion, based on 1966 data. This figure is more than one-third of the total annual capital outlay for all streets and highways, $9,123 billion. Another $1,114 billion was spent annually for maintenance of city streets, so $4,247 billion was spent each year on city streets. O f this total $4 billion, $2.5 billion went to ...
متن کاملJeffrey Streets And
We define an elliptic equation for Hermitian metrics which is related to the Einstein condition. Solutions to this equation are closely related to Kähler-Einstein metrics, and are automatically Kähler-Einstein when a certain non-positive condition is satisfied by c1(M). Given this, a natural flow equation arises taking Hermitian metrics to Kähler metrics. We prove short time existence and regul...
متن کاملLife on streets.
OBJECTIVE Millions of children leave home in hope of finding a more tolerable life. The study tries to find out the kind of life they lead once out on the streets. METHODS Cross-sectional study of all street boys admitted to a Child Observation Home in New Delhi during specified 6 months. Questions regarding various aspects of survival on streets were asked. RESULTS Majority are forced to w...
متن کاملWalking Streets Faster
A fundamental problem in robotics is to compute a path for a robot from its current location to a given goal. In this paper we consider the problem of a robot equipped with an on-board vision system searching for a goal g in an unknown environment. We assume that the robot is originally located at a point s on the boundary of a street polygon. A street is a simple polygon with two distinguished...
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ژورنال
عنوان ژورنال: Computers, Environment and Urban Systems
سال: 2008
ISSN: 0198-9715
DOI: 10.1016/j.compenvurbsys.2007.03.003