In cerebrovascular networks, some vertices are more connected to each other than with the rest of vasculature, defining a community structure. Here, we introduce class model networks built by rewiring Random Regular Graphs, which enables reproduction this structure and topological properties networks. We use these study global flow reduction induced removal single edge. analytically show that c...

A 39-year-old woman presented with a right-hemispheric stroke 1 year after she had suffered a left-hemispheric stroke. Her diagnostic workup was notable for bilateral occlusions of the internal carotid arteries at their origins and a positive lupus anticoagulant antibody test. There was no evidence of carotid dissection or another identifiable cause for her carotid occlusions. These findings su...

We have proposed novel techniques using region based segmentation for resolving complex occlusions of objects as they are tracked by a single, static video camera. The data is low resolution and noisy. The method improves the segmentation of moving objects obtained from any background subtraction method and then tracks objects continuously before, during and after occlusions. The method has bee...

Occlusions provide critical cues about the 3D structure of man-made and natural scenes. We present a mathematical framework and algorithm to detect and localize occlusions in image sequences of scenes that include deforming objects. Our occlusion detector works under far weaker assumptions than other detectors. We prove that occlusions in deforming scenes occur when certain well-defined local t...

The results of a long-term study (3 to 9 months) of chorioretinal vascular occlusions resulting from injection of latex microspheres of known sizes are reported. Isolated occlusions of small retinal vessels (capillaries and precapillary arterioles) resulted in no histologic changes in the retina. Occlusion of large retinal vessels (arterioles) caused atrophic changes in the inner retinal layers...

Despite great progress achieved in 3-D pose tracking during the past years, occlusions and self-occlusions are still an open issue. This is particularly true in silhouette-based tracking where even visible parts cannot be tracked as long as they do not affect the object silhouette. Multiple cameras or motion priors can overcome this problem. However, multiple cameras or appropriate training dat...