Technikatörténeti szemle 11. (1979)
TANULMÁNYOK - Vajda Pál: Creative Hungarians in mathematics, astronomy, physics, chemistry, technical sciences and industry. A selected bio-bibliography
Bäschlin F.: Marcel Grossmann (= Schweizerische Zeitschrift für Vermessungswesen, Kulturtechnik und Photogrammetrie 34,1936. pp. 243.), Kollros L.: Prof. Dr. Marcel Grossmann (= Verhandlungen der Schweizerischen Naturforschenden Gesellschaft 118/1937. pp. 325—329.), SaxerW.: Marcel Grossmann (= Vierteljahrsschrift der Naturforschenden Gesellschaft in Zürich 81/1936. pp. 322— 326.) DSB HAAR, Alfréd (1885—1933). Mathematician. Haar worked in analysis. He first extended what was known on divergence, summation, and oscillation from the Fourier system to other orthogonal systems, in particular to solutions of Sturm-Louville problems. He discovered a curious orthogonal system according to which every continuous function can be developed into an everywhere converging series; its elements are discontinuous functions admitting, at most, three values. Later he became interested in multiplicative relations of orthogonal sytems and characterized their multiplication tables. This research led him to the character theory of commutative groups as a precursor of Pontryagin on duality. In complex functions Haar did work on splitting lines of singularities and on asymptotics. DSB, WHC, DHS HEVESY, György (1885—1966). Chemist. Nobel Prize in Chemistry (George Hevesy) Hevesy developed radioactive indication method which earned him the 1943 Nobel Prize for Chemistry. His discovery is regarded as the basis for all methods using radioactive isotopes for labelling, whether applied in biology, metallurgy, medicine, or in analytical chemistry etc. He discovered dilution method in 1932 and activation analysis in 1936. Hevesy also discovered with D. Coster a new element: Hafnium. Färber £.: Nobel prize winners in chemistry 1901—1950, Berlin 1953. pp. 170— 173., H. Levi: George de Hevesy (= International Journal of Applied Radiation and Isotopes 16/1965. pp. 512—524., Nuclear Physics A 98/1967. pp. 1—24.), Sza- badváry F.: George Hevesy (= Journal of Radioanalytical Chemistry 1 1968. pp. 97—102.) DSB, WHC, CH, ITS, SZA, CRW, ZAB, ABE, RPF JÁNOSSY, Lajos (1912—1978). Physicist. The scientific research work of Jánossy extends to the fields of experimental and theoretical investigation of cosmic rays, the study of statistical processes, the investigation of the fundamental questions of the theory of relativity and of cosmic ray cascade processes. His treatment of the concept of special and general relativity deviates to some extent from that of Einstein but gives identical physical results established also from the point of view of philosophy. The theoretical investigation of the fundamental questions of quantum mechanics made it possible to develop a hydrodynamical model which he dealt intensively until the end of his life. VPMS Oct. 1958. p. 2., G. D. Rochester: L. Jánossy (= Nature 272/1978. p. 656.), J. L. Synge: Relativity and Reality (— Nature 234/1971. pp. 274—275.) WHC JÁRAY, Pál (1889—1974). Mechanical engineer. Járay was a rather versatile inventor. His field of activity was aircraft and automobile design. In 1921 his first patent was handed in for a streamlined 60
