Entangled networks of carbon nanofibers are characterized both mechanically and electrically. Results for both tensile and compressive loadings of the entangled networks are presented for various densities. Mechanically, the nanofiber ensembles follow the micromechanical model originally proposed by van Wyk nearly 70 years ago. Interpretations are given on the mechanisms occurring during loadin...

S.W.P. Cloete, J.J. Olivier, J.B. van Wyk, S.J. Schoeman and G.J. Erasmus University of the Free State, PO Box 339, Bloemfontein 9300, South Africa Institute for Animal production: Elsenburg, Private Bag X1, Elsenburg 7607, South Africa ARC: Animal Improvement Institute, Private Bag X5013, Stellenbosch 7599, South Africa Animal Sciences, University of Stellenbosch, Private Bag X1, Matieland 760...

Judson J. Van Wyk, M.D. died peacefully at his home on June 22, 2004 after a relatively brief illness. By his side were Persis, his wife and soul-mate of 60 years, his children, Judy, Peter, Perky and Jake, and his six grandchildren. During his 83 years he led an extra-ordinarily full life devoted to his passions, his family, his work, and sailing. He was an active academician until weeks befor...

background cutis marmorata telangiectatica congenita (cmtc) is a sporadic congenital skin vascular abnormality. significant number of patients has other congenital anomalies. case report we report a case of a preterm male newborn with cutis marmorata pattern presented on the skin of the face, right side of front of the trunk, whole back, glutei and both legs. besides, microretrognatia and asymm...

Strong normalization results are obtained for a general language for collection types. An induced normal form for sets and bags is then used to show that the class of functions whose input has height (that is, the maximal depth of nestings of sets/bags/lists in the complex object) at most i and output has height at most o de nable in a nested relational query language without powerset operator ...