I. M. Sheffer

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The paper is concerned with the results of experimental studies on the equivalent doses of irradiation of 11 organs and tissues by which one can calculate effective equivalent doses per study. Calculation were done on an anthropomorphous phantom of "conventional" man with the help of a thermoluminescent dosimetric system based on lithium fluoride.(More)
It has been established on the basis of experimental dosimetric studies that during x-ray studies tissue doses of the irradiation of vital organs depend very little on the voltage of the x-ray tube in the range of 80-120 kV. It necessitates the use of x-ray radiation detectors with a high sensitivity as well as sparing technology of examination to decrease(More)
The sixty-second Summer Meeting of the American Mathematical Society was held at Pennsylvania State University, University Park, Pennsylvania, on Tuesday through Friday, August 27-30, 1957, in conjunction with meetings of the Mathematical Association of America, the Society for Industrial and Applied Mathematics, and Pi Mu Epsilon. The registration was 649(More)
In his retiring presidential address before the American Mathematical Society (December, 1931), E. R. Hedrick gave a resumé of the theory of non-analytic functions of a complex variable.f We propose in the present note to establish, with regard to these functions, some elementary properties that do not appear in the Hedrick report. (In the course of the(More)
The five hundred first meeting of the American Mathematical Society was held at Columbia University in New York City on Friday and Saturday, April 23-24, 1954. About 375 persons registered, including 335 members of the Society. In this meeting the Society associated itself with the theme of Columbia's Bicentennial Celebration—Man's Right to Knowledge and(More)
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