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» Universal Exponentiation Algorithm
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STOC
2005
ACM
147views Algorithms» more  STOC 2005»
15 years 10 months ago
Simulating independence: new constructions of condensers, ramsey graphs, dispersers, and extractors
We present new explicit constructions of deterministic randomness extractors, dispersers and related objects. We say that a distribution X on binary strings of length n is a -sour...
Boaz Barak, Guy Kindler, Ronen Shaltiel, Benny Sud...
SIAMCOMP
2002
138views more  SIAMCOMP 2002»
14 years 9 months ago
Phase Change of Limit Laws in the Quicksort Recurrence under Varying Toll Functions
We characterize all limit laws of the quicksort type random variables defined recursively by Xn d = XIn + X n-1-In + Tn when the "toll function" Tn varies and satisfies ...
Hsien-Kuei Hwang, Ralph Neininger
ICALP
2011
Springer
14 years 1 months ago
Improved Approximation for the Directed Spanner Problem
We present an O( √ n log n)-approximation algorithm for the problem of finding the sparsest spanner of a given directed graph G on n vertices. A spanner of a graph is a sparse ...
Piotr Berman, Arnab Bhattacharyya, Konstantin Maka...
ICDE
2009
IEEE
255views Database» more  ICDE 2009»
15 years 11 months ago
Database Management as a Service: Challenges and Opportunities
Data outsourcing or database as a service is a new paradigm for data management in which a third party service provider hosts a database as a service. The service provides data man...
Ahmed Metwally, Amr El Abbadi, Divyakant Agrawal, ...
ICIP
2001
IEEE
15 years 11 months ago
Color error diffusion with generalized optimum noise shaping
Wc optimizc thc noisc shaping bchavior of color crror diffusion by designing an optirnizcd crror filtcr bascd on a proposed noisc shaping modcl for color crror diffusion and a gcn...
Niranjan Damera-Venkata, Brian L. Evans