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STOC
2009
ACM
136views Algorithms» more  STOC 2009»
16 years 7 months ago
Random walks on polytopes and an affine interior point method for linear programming
Let K be a polytope in Rn defined by m linear inequalities. We give a new Markov Chain algorithm to draw a nearly uniform sample from K. The underlying Markov Chain is the first t...
Ravi Kannan, Hariharan Narayanan
CCS
2009
ACM
16 years 7 months ago
PBES: a policy based encryption system with application to data sharing in the power grid
In distributed systems users need the ability to share sensitive content with multiple other recipients based on their ability to satisfy arbitrary policies. One such system is el...
Rakeshbabu Bobba, Himanshu Khurana, Musab AlTurki,...
CCS
2009
ACM
16 years 7 months ago
Efficient IRM enforcement of history-based access control policies
Inlined Reference Monitor (IRM) is an established enforcement mechanism for history-based access control policies. IRM enforcement injects monitoring code into the binary of an un...
Fei Yan, Philip W. L. Fong
CHI
2009
ACM
16 years 7 months ago
Taking the time to care: empowering low health literacy hospital patients with virtual nurse agents
Ninety million Americans have inadequate health literacy, resulting in a reduced ability to read and follow directions in the healthcare environment. We describe an animated, empa...
Timothy W. Bickmore, Laura M. Pfeifer, Brian W. Ja...
CHI
2009
ACM
16 years 7 months ago
Tactile motion instructions for physical activities
While learning new motor skills, we often rely on feedback from a trainer. Auditive feedback and demonstrations are used most frequently, but in many domains they are inappropriat...
Daniel Spelmezan, Mareike Jacobs, Anke Hilgers, Ja...
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