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ICC
2007
IEEE
118views Communications» more  ICC 2007»
14 years 1 months ago
A Class of LDPC Erasure Distributions with Closed-Form Threshold Expression
— In this paper, a family of low-density parity-check (LDPC) degree distributions, whose decoding threshold on the binary erasure channel (BEC) admits a simple closed form, is pr...
Enrico Paolini, Marco Chiani
FOCS
2002
IEEE
14 years 13 days ago
The Hardness of 3 - Uniform Hypergraph Coloring
We prove that coloring a 3-uniform 2-colorable hypergraph with c colors is NP-hard for any constant c. The best known algorithm [20] colors such a graph using O(n1/5 ) colors. Our...
Irit Dinur, Oded Regev, Clifford D. Smyth
ICSM
2000
IEEE
13 years 12 months ago
Evolution in Open Source Software: A Case Study
Most studies of software evolution have been performed on systems developed within a single company using traditional management techniques. With the widespread availability of se...
Michael W. Godfrey, Qiang Tu
IJIT
2004
13 years 8 months ago
A Lossless Watermarking Based Authentication System For Medical Images
In this paper we investigate the watermarking authentication when applied to medical imagery field. We first give an overview of watermarking technology by paying attention to frag...
Samia Boucherkha, Mohamed Benmohamed
PAMI
2006
128views more  PAMI 2006»
13 years 7 months ago
On Weighting Clustering
Recent papers and patents in iterative unsupervised learning have emphasized a new trend in clustering. It basically consists of penalizing solutions via weights on the instance po...
Richard Nock, Frank Nielsen