7,657 research outputs found

    A Cancer Of Environmental and Occupational Etiology and a Thigh Tumor Described by Sir Percivall Pott in the Eighteenth Century

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    Percivall Pott was born in London, England 26 December 1713. His father died when he was four, leaving Mrs. Pott with Percivall and a daughter by a previous marriage. Pott\u27s education was thereafter financed by one of Mrs. Pott\u27s cousins, Dr. Wilco x, Bishop of Roches· ter. Although Pott became proficient in classical literature, and although Dr. Wilcox hoped that he would choose a career in theology, he chose a career in surgery instead and was bound as an apprentice to Dr. Nourse, a surgeon at St. Bartholomew\u27s Hospital in 1729. He spent 58 years at this hospital, resigning from the post of Surgeon in July 1787. One and one-half years later, after visiting sick patients on horseback in cold weather, he developed pneumonia and died within a few days, having a4nost reached his 75th birthday. Pott was not only innovative in his surgical practice but also was an excellent writer. He published articles on many subjects, including treatment of fracture of the fibula (Pott\u27s fracture), tumors, hernia congenita, fistula Iachrymalis, head injuries, hydrocele, tubercular spine, the need for amputation of limbs in certain cases, cataract surgery, and fistulae; one of his most famous observations was the development of carcinoma of the scrotum among young chimney sweepers in London

    A Cancer Of Environmental and Occupational Etiology and a Thigh Tumor Described by Sir Percivall Pott in the Eighteenth Century

    Get PDF
    Percivall Pott was born in London, England 26 December 1713. His father died when he was four, leaving Mrs. Pott with Percivall and a daughter by a previous marriage. Pott\u27s education was thereafter financed by one of Mrs. Pott\u27s cousins, Dr. Wilco x, Bishop of Roches· ter. Although Pott became proficient in classical literature, and although Dr. Wilcox hoped that he would choose a career in theology, he chose a career in surgery instead and was bound as an apprentice to Dr. Nourse, a surgeon at St. Bartholomew\u27s Hospital in 1729. He spent 58 years at this hospital, resigning from the post of Surgeon in July 1787. One and one-half years later, after visiting sick patients on horseback in cold weather, he developed pneumonia and died within a few days, having a4nost reached his 75th birthday. Pott was not only innovative in his surgical practice but also was an excellent writer. He published articles on many subjects, including treatment of fracture of the fibula (Pott\u27s fracture), tumors, hernia congenita, fistula Iachrymalis, head injuries, hydrocele, tubercular spine, the need for amputation of limbs in certain cases, cataract surgery, and fistulae; one of his most famous observations was the development of carcinoma of the scrotum among young chimney sweepers in London

    Strongly Regular Graphs Constructed from pp-ary Bent Functions

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    In this paper, we generalize the construction of strongly regular graphs in [Y. Tan et al., Strongly regular graphs associated with ternary bent functions, J. Combin.Theory Ser. A (2010), 117, 668-682] from ternary bent functions to pp-ary bent functions, where pp is an odd prime. We obtain strongly regular graphs with three types of parameters. Using certain non-quadratic pp-ary bent functions, our constructions can give rise to new strongly regular graphs for small parameters.Comment: to appear in Journal of Algebraic Combinatoric

    Non-Boolean almost perfect nonlinear functions on non-Abelian groups

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    The purpose of this paper is to present the extended definitions and characterizations of the classical notions of APN and maximum nonlinear Boolean functions to deal with the case of mappings from a finite group K to another one N with the possibility that one or both groups are non-Abelian.Comment: 17 page

    A sufficient condition for the boundedness of operator-weighted martingale transforms and Hilbert transform

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    Let W be an operator weight taking values almost everywhere in the bounded positive invertible linear operators on a separable Hilbert space H. We show that if W and its inverse W−1 both satisfy a matrix reverse Holder property introduced in [2], then the weighted Hilbert transform H : L2W(R,H) → L2W(R,H) and also all weighted dyadic martingale transforms Tσ: L2W(R,H) → L2W(R,H) are bounded. We also show that this condition is not necessary for the boundedness of the weighted Hilbert transform

    Inventario da flora apicola do Pantanal em Mato Grosso do Sul.

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    E apresentada uma lista preliminar de 162 plantas apicolas do Pantanal, pertencentes a 54 familias, das quais se destacam pelo numero de especies Compositae e Leguminosae. Assa-peixe (Vernonia scabra Pers.), cumbaru (Dipteryx alata Vog.), hortelazinha (Hyptis lappacea Benth.), tarumeiro (Vitex cymosa Bert.) e "vick" (Bacopa sp.) estao entre as especies frequentes mais procuradas por abelhas. E dado um calendario floral (mensal) que mostra que ha floracao durante o ano todo. Considera-se a regiao propicia a Apicultura

    Plantas colonizadoras da estrada transpantaneira (da Fazenda Leque ao Retiro Chatelodo), na Nhecolândia, Pantanal.

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