Bibliografía: al final de cada artículo Notas: al pie de texto COMBINATORICS IN COMPUTING Guest Editor's Introduction / Isabel Beichi and Francis Sullivan. p.12 Graph Analysis with High - Performance Computing / Bruce Hendrickson and Jonathan W. Berry. p.14 A Unifield Framerwork for Numerical and Combinatorial Computing / John R. Gilbert, Viral B. Shah and Steve Reinhardt. p.20 Sampling Binary Contingency Tables / Ivona Bezáková. p.26 Passing Messages to Lonely Numbers / Heiko Bauke. p.32 ALSO IN THIS ISSUE Real - Time Pothorealistic Virtual Human Anatomy / Yanling Liu; Jim X. Chen and Lin Yang. p.41 3D Face Visualizatiobn Using Gird Ligth / Lei Shi; Xin Yang and Hailang Pan. p.48 Agile Computer Control of a Complex Experiment / Gaël Varoquaux. p.55 COLUMNS The First Word. p.4 At Isssue. p.60 The Last Word. p.88 DEPARTAMENTS News. p.6 Scientific Programming. p.65 Computer Simulations. p.701 Visualization Corner. p.78 Technologies. p.82 Books. p.58