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HCI
2007
13 years 11 months ago
A Navigation System Using Ultrasonic Directional Speaker with Rotating Base
This paper proposes new method for object reference which enables a person to find surrounding objects and develops a navigation system named CoCo. CoCo employs an ultrasonic direc...
Kentaro Ishii, Yukiko Yamamoto, Michita Imai, Kazu...
COCO
2007
Springer
126views Algorithms» more  COCO 2007»
14 years 4 months ago
On Derandomizing Probabilistic Sublinear-Time Algorithms
There exists a positive constant α < 1 such that for any function T(n) ≤ nα and for any problem L ∈ BPTIME(T(n)), there exists a deterministic algorithm running in poly(T...
Marius Zimand
COCO
2007
Springer
92views Algorithms» more  COCO 2007»
14 years 4 months ago
Halfspace Matrices
A halfspace matrix is a Boolean matrix A with rows indexed by linear threshold functions f, columns indexed by inputs x ∈ {−1,1}n, and the entries given by Af,x = f(x). We dem...
Alexander A. Sherstov
COCO
2007
Springer
94views Algorithms» more  COCO 2007»
14 years 1 months ago
On Approximate Majority and Probabilistic Time
We prove new results on the circuit complexity of Approximate Majority, which is the problem of computing Majority of a given bit string whose fraction of 1's is bounded away...
Emanuele Viola
COCO
2007
Springer
142views Algorithms» more  COCO 2007»
14 years 4 months ago
Quantum t-designs: t-wise Independence in the Quantum World
A t-design for quantum states is a finite set of quantum states with the property of simulating the Haar-measure on quantum states w.r.t. any test that uses at most t copies of a...
Andris Ambainis, Joseph Emerson