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ECCC
1998
105views more  ECCC 1998»
13 years 7 months ago
Pseudorandom generators without the XOR Lemma
Impagliazzo and Wigderson IW97] have recently shown that if there exists a decision problem solvable in time 2O(n) and having circuit complexity 2 (n) (for all but nitely many n) ...
Madhu Sudan, Luca Trevisan, Salil P. Vadhan
SIAMCOMP
1998
125views more  SIAMCOMP 1998»
13 years 7 months ago
Free Bits, PCPs, and Nonapproximability-Towards Tight Results
This paper continues the investigation of the connection between probabilistically checkable proofs (PCPs) and the approximability of NP-optimization problems. The emphasis is on p...
Mihir Bellare, Oded Goldreich, Madhu Sudan
SPE
1998
129views more  SPE 1998»
13 years 7 months ago
Timing Trials, or the Trials of Timing: Experiments with Scripting and User-Interface Languages
This paper describes some basic experiments to see how fast various popular scripting and user-interface languages run on a spectrum of representative tasks. We found enormous var...
Brian W. Kernighan, Christopher J. Van Wyk
TIP
1998
240views more  TIP 1998»
13 years 7 months ago
DCT-based motion estimation
—We propose novel discrete cosine transform (DCT) pseudophase techniques to estimate shift/delay between two onedimensional (1-D) signals directly from their DCT coefficients by...
Ut-Va Koc, K. J. Ray Liu
TOMS
1998
148views more  TOMS 1998»
13 years 7 months ago
PELLPACK: A Problem-Solving Environment for PDE-Based Applications on Multicomputer Platforms
This paper presents the software architecture and implementation of the problem solving environment (PSE) PELLPACK for modeling physical objects described by partial differential ...
Elias N. Houstis, John R. Rice, Sanjiva Weerawaran...