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FOCS
2009
IEEE
14 years 3 months ago
Local Graph Partitions for Approximation and Testing
—We introduce a new tool for approximation and testing algorithms called partitioning oracles. We develop methods for constructing them for any class of bounded-degree graphs wit...
Avinatan Hassidim, Jonathan A. Kelner, Huy N. Nguy...
ICASSP
2009
IEEE
14 years 3 months ago
Background recovery from video sequences using motion parameters
This paper presents a novel scheme for extracting a still background occluded by a number of foreground objects, moving in different directions and velocities in a video sequence,...
Srenivas Varadarajan, Lina J. Karam, Dinei Florenc...
SP
2009
IEEE
144views Security Privacy» more  SP 2009»
14 years 3 months ago
De-anonymizing Social Networks
Operators of online social networks are increasingly sharing potentially sensitive information about users and their relationships with advertisers, application developers, and da...
Arvind Narayanan, Vitaly Shmatikov
AIRWEB
2009
Springer
14 years 3 months ago
Social spam detection
The popularity of social bookmarking sites has made them prime targets for spammers. Many of these systems require an administrator’s time and energy to manually filter or remo...
Benjamin Markines, Ciro Cattuto, Filippo Menczer
SARA
2009
Springer
14 years 3 months ago
A Practical Use of Imperfect Recall
Perfect recall is the common and natural assumption that an agent never forgets. As a consequence, the agent can always condition its choice of action on any prior observations. I...
Kevin Waugh, Martin Zinkevich, Michael Johanson, M...