Central Mining--Rand Mines Group. Report for the year 1947
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چکیده
منابع مشابه
Report of the Central Tracking Group
J. Carr, University of Colorado J. P. Merlo, University of California at Riverside/Saclay I?. DeSalvo, Cornell University A. Odian, Stanjord Linear Accelerator Center E. Elsen, University of Heidelberg F. Paige, Brookhaven National Laboratory T. Gottschalk, California Institute of Technology D. Rubin, Cornell University K. Heller, University of Minnesota D. Smith, University oj California at Ri...
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Extensive surveys carried out in Europe and America have shown the incidence of coalworkers' pneumoconiosis to be widespread (Flinn, Seifert, Brinton, Jones, and Franks, 1941; Fletcher, 1955). In India, however, the prevalence of this disease has never been investigated, and a report published by the government of India in 1946 (Deshpande, 1946) stated that there was no conclusive evidence that...
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In 1948 roof falls were the number one killer of coal miners in America. While the Bureau of Mines had been formed in 1910 to improve coalmine safety, it had largely focused on explosions, for which technological solutions appeared to exist. Roof falls, by contrast, were not amenable to a technical fix. Beginning in 1948, however, the Bureau discovered roof bolting, which it promoted as a safer...
متن کاملthe automorphism group for $p$-central $p$-groups
a $p$-group $g$ is $p$-central if $g^{p}le z(g)$, and $g$ is $p^{2}$-abelian if $(xy)^{p^{2}}=x^{p^{2}}y^{p^{2}}$ for all $x,yin g$. we prove that for $g$ a finite $p^{2}$-abelian $p$-central $p$-group, excluding certain cases, the order of $g$ divides the order of $text{aut}(g)$.
متن کاملthe automorphism group for p-central p-groups
a $p$-group $g$ is $p$-central if $g^{p}le z(g)$, and $g$ is $p^{2}$-abelian if $(xy)^{p^{2}}=x^{p^{2}}y^{p^{2}}$ for all $x,yin g$. we prove that for $g$ a finite $p^{2}$-abelian $p$-central $p$-group, excluding certain cases, the order of $g$ divides the order of $text{aut}(g)$.
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ژورنال
عنوان ژورنال: Occupational and Environmental Medicine
سال: 1949
ISSN: 1351-0711
DOI: 10.1136/oem.6.1.47-a