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1
Content available remote Presentation of a new bilingual mathematical dictionary
EN
In the contribution I am presenting a new English-Czech-English mathematical dictionary, which was prepared for university students in the Czech Republic, in the form of an on-line application with unrestricted access.
EN
Actually, pursuit techniques have become very popular ; in consequence, they have been very used in many signal and image processing works. Matching Pursuit and High Resolution Pursuit are the most representative pursuit techniques. In this work we introduce some image coding models based on these techniques. These models employ an overcomplete dictionary, which has been determined according to a previous knowledge and some performed tests. From such dictionary, the elements corresponding to the most important image structures are selected. The pursuit techniques, by a similarity measure, perform such selection. Coefficients of selected elements are quantized just when they are chosen in order to minimize error propagation along the process. The set of selected coefficients corresponds to an optimal image decomposition, or a new representation with a reduced quantity of elements. A simple reconstruction algorithm recovers the original image with a high visual quality.
4
Content available remote Historycy nauki w tomach XXXVII i XXXVIII Polskiego Słownika Biograficznego
PL
13 października b.r. odbyło się w Krakowie posiedzenie Rady Naukowej Polskiego Słownika Biograficznego, poświęcone sprawom aktualnym Redakcji i wzbogacone referatami naukowymi, omawiającymi wybrane zagadnienia tomów XXXVII i XXXVIII Słownika. Prelegentami byli prof. w Instytucie Historycznym Uniwersytetu Warszawskiego - dr hab. Zofia Zielińska i dyr. Instytutu Historii Nauki PAN - prof, dr hab. med. Andrzej Środka. Prof. Zielińska poświęciła swoje wystąpienie postaciom XVIII wieku, omawianym w obu tomach, a prof. Śródka - historykom nauki; referat prof. Zielińskiej był bardziej krytyczny, prof. Śródki - bardziej opisowy. Po obu referatach odbyła się przeszło dwugodzinna interesująca dyskusja. Poniżej - referat prof. A. Śródki in extenso.
EN
The article was first presented as a paper delivered the meeting of the Research Board of the Polski Słownik Biograficzny [Polish Biographical Dictionary] in October 1999. The aim of the paper was to analyze the contents of the two last volumes (volume 37 and 38) of the dictionary with regard to the profiles of the historians of science presented in them. Among 802 persons whose biograms appear in the two volumes, 132 (i.e. 16.5 percent) relate to scientists and scholars; of those only 17 persons (i.e. 13.5 per cent) concerned themselves with the history of science; in that number, historians of the medical sciences predominate. The author suggests that this situation is due, on the one hand, to the fact that history of science is not offered as a university specialization, and, on the other, to the lack of interest among history students in the problems of the history of science. The author also points out the need for specialists in particular fields, rather than only qualified historians, to engage in research on the history of science and learning.
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