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» Upper and lower Ramsey bounds in bounded arithmetic
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WDAG
2010
Springer
183views Algorithms» more  WDAG 2010»
15 years 4 months ago
What Is the Use of Collision Detection (in Wireless Networks)?
We show that the asymptotic gain in the time complexity when using collision detection depends heavily on the task by investigating three prominent problems for wireless networks,...
Johannes Schneider, Roger Wattenhofer
TRANSCI
2011
80views more  TRANSCI 2011»
15 years 1 months ago
The Dynamic Uncapacitated Hub Location Problem
This paper presents a dynamic (or multi-period) hub location problem. It proposes a branch-and-bound algorithm that uses a Lagrangean relaxation to obtain lower and upper bounds a...
Ivan Contreras, Jean-François Cordeau, Gilb...
ICASSP
2011
IEEE
14 years 10 months ago
Pilot optimization for time-delay and channel estimation in OFDM systems
Orthogonal frequency division multiplexing (OFDM) communication systems require accurate estimation of timing offset and channel impulse response in order to achieve desirable per...
Michael D. Larsen, Gonzalo Seco-Granados, A. Lee S...
APPROX
2011
Springer
284views Algorithms» more  APPROX 2011»
14 years 6 months ago
On Approximating the Number of Relevant Variables in a Function
In this work we consider the problem of approximating the number of relevant variables in a function given query access to the function. Since obtaining a multiplicative factor ap...
Dana Ron, Gilad Tsur
CRYPTO
2001
Springer
111views Cryptology» more  CRYPTO 2001»
15 years 11 months ago
On the Cost of Reconstructing a Secret, or VSS with Optimal Reconstruction Phase
Consider a scenario where an l-bit secret has been distributed among n players by an honest dealer using some secret sharing scheme. Then, if all players behave honestly, the secre...
Ronald Cramer, Ivan Damgård, Serge Fehr