980 resultados para Buhr, Manfred


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3 Briefe zwischen Manfred Schild und Max Horkheimer, 11.04.1946, 1946; 1 Brief vom War Department Washington an Max Horkheimer, 31.08.1943; 1 Brief und Beilage von Max Horkheimer an Anton C. Miller, 16.08.1943; 1 Brief von Max Horkheimer an Charles Perelman, 23.09.1940; 1 Brief von Fred M. Roberts an Edwin F. Borden, 16.04.1940; 1 Brief von Max Horkheimer an Edwin F. Bordin, 15.04.1940; 1 Brief von Fred M. Roberts an das American Consul General, 10.04.1940; 1 Brief von Max Horkheimer an Rudolf Schaar, 08.03.1940; 3 Briefe zwischen E. M. Bernstein und Max Horkheimer, 11.09.1939, 1939; 1 Brief von E. M. berstein an Otto Nathan, 21.06.1939; 1 Brief von Eleanor Slater an Max Horkheimer, 29.03.1939; 2 Briefe zwischen dem Internat Student Service und Franz Neumann, 09.02.1939; 2 Briefe zwsichen George F. Plimpton und Franz F. Neumann, 07.02.1939, 08.02.1939; 2 Briefe zwischen Alfred Grünebaum und Max Horkheimer, 29.11.1938, 13.12.1938; 1 Brief von Max Horkheimer an Robert S. Lynd, 30.04.1938; 1 Brief von Max Horkheimer an Dean Henry P. van Dusen, 30.04.1938; 1 Brief von Dean Henry P. van Dusen an Finley und Benjamin Parker, 25.04.19378; 1 Brief von Robert S. Lynd an Finley und Benjamin Parker, 25.04.1938; 1 Brief von Max Horkheimer an Paul Tillich, 22.04.1938; 1 Brief von Alfred K. Stern an Franz Neumann, 22.04.1938; 1 Brief von Alfred K. Stern an Finley und Benjamin Parker, 22.04.1938;

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Mode of access: Internet.

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Mode of access: Internet.

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Mode of access: Internet.

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Mode of access: Internet.

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General note: Title and date provided by Bettye Lane.

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Rezension von: Manfred Liebel: Kinder und Gerechtigkeit. Über Kinderrechte neu nachdenken. Weinheim / Basel: Beltz Juventa 2013 (278 S.; ISBN 978-3-7799-2837-9)

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Foragers of several species of stingless bees deposit pheromone spots in the vegetation to guide recruited nestmates to a rich food source. Recent studies have shown that Trigona and Scaptotrigona workers secrete these pheromones from their labial glands. An earlier report stated that species within the genus Geotrigona use citral from their mandibular glands for scent marking. Since convincing experimental proof for this conjecture is lacking, we studied the glandular origin of the trail pheromone of Geotrigona mombuca. In field bioassays, newly recruited bees were diverted by artificial scent trails that branched off from the natural scent trail deposited by their nestmates only when they were baited with extracts from the foragers` labial glands. Compounds extracted from the mandibular glands, however, did not release trail following behavior. This demonstrates that the trail pheromone of G. mombuca is produced in the labial glands, as in Trigona and Scaptotrigona. Furthermore, in chemical analyses citral was identified exclusively in the foragers` mandibular glands, which disproves its supposed role as a trail pheromone. The labial glands contained a series of terpene- and wax type esters, with farnesyl butanoate as major constituent. We, therefore, postulate that the trail pheromone of G. mombuca is composed of a blend of esters.

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We discuss the expectation propagation (EP) algorithm for approximate Bayesian inference using a factorizing posterior approximation. For neural network models, we use a central limit theorem argument to make EP tractable when the number of parameters is large. For two types of models, we show that EP can achieve optimal generalization performance when data are drawn from a simple distribution.