6,893 research outputs found

    Gerdes Family

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    Photograph of the Gerdes Family. Back row, left to right: John Henry Gerdes (1890-1978), Katherine Gerdes Ellis (1887-1965), Herman John Gerdes (1893-1978), Christian William Gerdes (1895-1927); Front row, left to right: Henry(1861-1940), Mary (Mamie) Gerdes (1898-1993), Katherine Borneman Gerdes (1862-1942). Mr. Gerdes was a retail grocer in Wilmington, NC for many years. The family lived at 522 S. 5th Avenue. All of the family is buried at Oakdale Cemetery

    Gerdes visto por sus contemporáneos

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    Contiene tres textos dedicados a Federico Gerdes: "LIED" poesía de Alberto Ureta, "Un Lied de Federico Gerdes" de Antonio Pinilla Rambaud, y “Homenaje a Watteau, de Federico Gerdes" de G. S. C., transcritos literalmente de los textos originales

    Neuronal representation of visual motion and orientation in the fly medulla

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    Spalthoff C, Gerdes R, Kurtz R. Neuronal representation of visual motion and orientation in the fly medulla. Frontiers in Neural Circuits. 2012;6:72.In insects, the first extraction of motion and direction clues from local brightness modulations is thought to take place in the medulla. However, whether and how these computations are represented in the medulla stills remain widely unknown, because electrical recording of the neurons in the medulla is difficult. As an effort to overcome this difficulty, we employed local electroporation in vivo in the medulla of the blowfly (Calliphora vicina) to stain small ensembles of neurons with a calcium-sensitive dye. We studied the responses of these neuronal ensembles to spatial and temporal brightness modulations and found selectivity for grating orientation. In contrast, the responses to the two opposite directions of motion of a grating with the same orientation were similar in magnitude, indicating that strong directional selectivity is either not present in the types of neurons covered by our data set, or that direction-selective signals are too closely spaced to be distinguished by our calcium imaging. The calcium responses also showed a bell-shaped dependency on the temporal frequency of drifting gratings, with an optimum higher than that observed in one of the subsequent processing stages, i.e., the lobula plate. Medulla responses were elicited by on- as well as off-stimuli with some spatial heterogeneity in the sensitivity for “on” and “off”, and in the polarity of the responses. Medulla neurons thus show similarities to some established principles of motion and edge detection in the vertebrate visual system

    Gerdes, K A, 410322

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    This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/387241Surname: GERDES. Given Name(s) or Initials: K A. Military Service Number or Last Known Location: 410322. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 52063.209011 Item: [2016.0049.19534] "Gerdes, K A, 410322

    Dual citizenship as a path-dependent process

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    Faist T, Gerdes J, Rieple B. Dual citizenship as a path-dependent process. COMCAD Arbeitspapiere - working papers, 7. Bielefeld: COMCAD - Center on Migration, Citizenship and Development; 2004

    Machtvolle Räume. Räume für Inklusion und Teilhabe am Arbeitsmarkt, reflektiert vor dem Hintergrund sozialer Ungleichheitslagen

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    Tomke S. Gerdes befasst sich mit der wichtigen Frage der sozialen Teilhabe im Lebensraum „Arbeit“. Dabei fokussiert die Autorin auf Menschen mit psychischen Beeinträchtigungen, greift jedoch ebenfalls „soziale Ungleichheitslagen“ in Form verschiedener intersektionaler Perspektiven auf. (DIPF/Orig.

    Upogebia australis, a new species of the Upogebiidae (Crustacea, Decapoda, Thalassinidea) from the Beagle Channel (Magellan Region)

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    Upogebia australis sp. nov. was caught with a multibox corer at one station in the Beagle Channel, southernmost America, during the ŽJoint Chilean-German-Italian Victor Hensen CampaignŽ in October 1994. This is the first record of the Upogebiidae from Chilean and Argentine waters, and up to now only two species from southern Brazil were known as the southernmost occurrence of the Upogebiidae in America (<30° latitude)
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