The collapsed buildings due to earthquake were detected from post-event aerial images using watershed segmentation algorithm. The objective was to detect the collapsed buildings based on the analysis of the cast shadows. The building boundaries were available and stored in a GIS as vector polygons. The building polygons were utilized to perform assessments in a building specific manner. The app...

The buildings fire safety is currently an important subject for researchers and practitioners due to probable incidents that can happen inside industrial plants, large public buildings or transport facilities: fires, explosions, toxic releases, etc. Even minor events can seriously endanger life, goods and environment. Particularly, fire spreading in large buildings represents a major threat tha...

We expound on the nature of collapse of one class of tall buildings (steel moment frame buildings) under earthquake excitation. Using a parametric analysis of a couple of index buildings subjected to idealized ground motion histories, we establish the ground motion features that cause collapse in these structures. Systematically mapping damage localization patterns, we track the evolution of th...

This paper proposes a method for buildings change detection. Vertical edges of buildings are extracted in pairs of aerial images respectively, taking advantage of the character that vertical edges intersect at their vanishing point without fail. The ground coordinates of the vertices on each vertical edge are calculated according to projection difference and the principle of frontage intersecti...

3D building data is needed in many application areas. Besides the geometric description an increasing number of applications also demand thematic information about acquired buildings. We present a concept for the automatic extraction of buildings from aerial images. In contrast to other approaches generic building structures both are geometrically reconstructed and semantically classified. A co...

Despite substantial evidence that resources and outcomes are transmitted across generations, there has been limited inquiry into the extent to which anti-poverty programs actually disrupt the cycle of bad outcomes. We explore how the effects of the United States’ largest early childhood program transfer across generations. We leverage the geographic rollout of this federally funded, means-teste...

Ð This paper assesses the Argentine stabilization and market reform strategies since 1989. We argue that Argentina may be penned in by its own success: exchange rate targeting quelled in ̄ation but the resulting real appreciation has limited export and employment growth; microeconomic reforms raised eciency but have threatened income distribution and hence political stability; exclusive styles ...

Rapid texture mapping of buildings and other man-made objects is a key aspect for reconstruction of 3D city landscapes. An effective approach by the way of coarse-to-fine 3D city model generation based on digital photogrammetric theory is proposed. Three image sequences, two oblique photography to buildings’ walls and one vertical photography to building’s roof, acquired by digital video camera...