Over the last dozen years, as doctors for homeless people in Pittsburgh, USA and Amsterdam, the Netherlands, we have been networking internationally and travelled the streets to find social and medical workers who bring care to homeless people. We felt the need to reach out on the streets to meet homeless people and their problems, and to reach into mainstream services, academic centres and res...

Street parking spots for automobiles are a scarce commodity in most urban environments. The heterogeneity of car sizes makes it inefficient to rigidly define fixed-sized spots. Instead, unmarked streets in cities like New York leave placement decisions to individual drivers, who have no direct incentive to maximize street utilization. In this paper, we explore the effectiveness of two different...

We consider streamline patterns associated with single and double von Kármán point vortex streets on the surface of a nonrotating sphere, with and without pole vortices. The full family of streamline patterns are identified and the topological bifurcations from one pattern to another are depicted as a function of latitude and pole strength. The process involves first finding appropriate vortex ...

The amount of crowdsourced geospatial content on the Web is constantly increasing, providing a wealth of information for a variety of location-based services and applications. This content can be analyzed to discover interesting locations in large urban environments which people choose for different purposes, such as for entertainment, shopping, business or culture. In this paper, we focus on t...

The presence of vast numbers of unsupervised and unprotected children is a phenomenon that is common throughout Latin America, and in few places are the street children more visible, and reviled, than in Brazil. Estimates of their numbers in Brazil have ranged from 7 to 17 million, but more informed assessments suggest that between 7 and 8 million children, ages 5 to 18, live and/or work on the...

There is little doubt that those of us who are involved in the great industry of motor vehicle transportation—whether it be along the lines of design, maintenance, or operations—have come to recognize that street and highway capacity considerations are indispensable. It is unfortunate, however, that too often there is a lack of clear understanding of what we mean by capacity and how it actually...

In this work we present a novel compact scene representation based on Stixels that infers geometric and semantic information. Our approach overcomes the previous rather restrictive geometric assumptions for Stixels by introducing a novel depth model to account for non-flat roads and slanted objects. Both semantic and depth cues are used jointly to infer the scene representation in a sound globa...

We consider the problem of walking a robot in an unknown polygon called “street”, starting from a point s to reach a target t . The robot is assumed to have minimal sensing capability in a way that cannot infer any geometric properties of the environment, such as its coordinates, angles or distances; but it is equipped with a sensor that can only detect the discontinuities in the depth informat...

The eighteenth century was the age of enlightenment. In that partofitwhich concerns us this evening between 1740 and 1780, we find a generation of men self-poised, self-approved, freed from the disturbing passions of the past and not yet troubled by the different world which would soon be upon them as a result of the Industrial and the French Revolutions. It was a moment of peace between the re...