331,260 research outputs found

    Marie Müller / [Charlotte von Ahlefeld]

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    Bücheranzeige S. [389-390]Vorlageform des Erscheinungsvermerks: Berlin, 1733. Bey J. F. Unger

    Siri Brahe Oder Die Neugierigen : Ein Schauspiel In Drei Aufzügen / Von Sr. Majestät Gustaf Dem Dritten Könige In Schweden. Aus Dem Schwedischen Übersetzt Von J. A. Gruttschreiber Königl. Preussischem Legationssekretair In Stockholm

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    S. [121]-139 ein Brief: An Den Herrn Legationssekretair Gruttschreiber In Stockholm, unterzeichnet: Berlin den 10. Jan. 1794. Fr. Rambach, Doktor der Philosophie.Vorlageform des Erscheinungsvermerks: Berlin. Bei Johann Friedrich Unger. 1794.Frontispiz (Portr., Kupferst.

    Partitioning ecosystem scale carbon fluxes into photosynthetic and respiratory components with emphasis on dynamics in δ13CO2

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    Unger S. Partitioning ecosystem scale carbon fluxes into photosynthetic and respiratory components with emphasis on dynamics in δ13CO2. Bielefeld: Universität Bielefeld; 2008

    Unger (W. S.). Middelburg als Handelsstad (XIIIe tot XVIe eeuw)

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    De Sturler J. Unger (W. S.). Middelburg als Handelsstad (XIIIe tot XVIe eeuw). In: Revue belge de philologie et d'histoire, tome 17, fasc. 1-2, 1938. pp. 417-422

    Unger, M A, NX1632

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    This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete.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/422677Surname: UNGER. Given Name(s) or Initials: M A. Military Service Number or Last Known Location: NX1632. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 3221.248391 Item: [2016.0049.54938] "Unger, M A, NX1632

    INFINITE DIMENSIONAL OPTIMIZATION APPLIED TO PAIR CREATION FROM THE VACUUM

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    We examine the electron-positron pair creation process from the vacuum for general time-dependent external fields. By applying the framework of optimal control theory, we determine those temporal pulse shapes, that can maximize the final number of created positrons for a given set of momenta. In the perturbative regime of sufficiently small pulse energies or short interaction times, we obtain analytical forms that match the computational data of the optimal fields for the chosen sets of momenta. [1-7] This work has been supported by the NSF, NSFC and Research Corporation. [1] Q.Z. Lv, J. Unger, Y.T. Li, Q. Su and R. Grobe, Euro. Phys. Lett. 116, 40003 (2016). [2] Q.Z. Lv, J. Unger, Y.T. Li, Q. Su and R. Grobe, Phys. Rev. A 95, 023416 (2017). [3] N.D. Christensen, J. Unger, S. Pinto, Q. Su and R. Grobe, Ann. Phys. 389, 239 (2018). [4] S. Dong, R. Flores, J. Unger, Q. Su and R. Grobe, Phys. Rev. E 98, 012221 (2018). [5] J. Unger, S. Dong, R. Flores, Q. Su and R. Grobe, Laser Phys. (in press). [6] J. Unger, S. Dong, R. Flores, Q. Su and R. Grobe, Phys. Rev. A (in press). [7] J. Unger, S. Dong, Q. Su and R. Grobe, Phys. Rev. A (submitted)

    Plumatella tsimiheta Wood & Unger & Rasoamihaingo 2023, sp. nov.

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    <i>Plumatella tsimiheta</i> sp. nov. <p>urn:lsid:zoobank.org:act: BD3A02EE-5785-45B7-A3DB-E939BE6A59FB</p> <p>Fig. 3</p> Diagnosis <p> Floatoblasts unusually long and narrow, the outer dimensions similar to <i>Plumatella dhritiae</i> Wood, 2022; fenestra tubercles well formed and densely crowded, spilling onto the annulus in a manner resembling <i>P. patagonica</i> Wiebach, 1974.</p> Etymology <p>The species name is a tribute to the local ethnic group, the Tsimihety, who inhabit much of the northern Madagascar.</p> Material examined <p> <b>Holotype</b></p> <p>MADAGASCAR • Statoblast valves; Mahajanga Province, Sofia Region, Bealanana District, Marotolana Village, Lake Sofia; 14°35′04″ S, 49º00′30″ E; Sep. 2019; L. Unger leg.; NHMUK 2023.1.17.1, slide collection.</p> Description <p>Floatoblast 51–535 µm long (Fig. 3a) with an average of 530 µm and 245–255 µm wide with an average of 253 µm (n = 3), length: width averaging 2.16; capsule measuring 360 µm by 215 µm; dorsal valve nearly flat, with fenestra encroaching on underlying capsule only at the poles (Fig. 3a, arrows); ventral valve convex, with fenestra matching capsule outline; fenestra tubercles small, densely crowded and highly convex, merging indistinctly with annular cells surrounding the fenestrae; other annular cells mostly defined by low mounds; suture appearing as crenulated margin around entire floatoblast (Fig. 3b).</p> Remarks <p> While the floatoblast outer dimensions resemble those of <i>Plumatella dhritiae</i> Wood, 2022, in that species the dorsal fenestra encroaches uniformly on all sides of the capsule, fenestra tubercles are well spaced, and the outer margin is smooth. Floatoblast tubercles in <i>P. tsimiheta</i> sp. nov. resemble those of <i>P. patagonica</i> Wiebach, 1974 in their size, density, and distribution (Fig. 3c). However, in that species the floatoblast is over 750 µm in length and more broadly oval.</p>Published as part of <i>Wood, Timothy S., Unger, Lilian Eva & Rasoamihaingo, Laurence, 2023, Bryozoan statoblasts from lake sediments in Madagascar, including two new species, pp. 138-147 in European Journal of Taxonomy 900 (1)</i> on pages 140-142, DOI: 10.5852/ejt.2023.900.2307, <a href="http://zenodo.org/record/10079849">http://zenodo.org/record/10079849</a&gt

    Plumatella sofiae Wood & Unger & Rasoamihaingo 2023, sp. nov.

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    <i>Plumatella sofiae</i> sp. nov. <p>urn:lsid:zoobank.org:act: 84847FC0-B38F-4548-B9AE-EB3FB8A28B99</p> <p>Fig. 4</p> Diagnosis <p>Floatoblast large, average length>500 µm, average length: width 1.79; fenestra tubercles small and well spaced; suture minutely toothed and projecting beyond the outer margin.</p> Etymology <p>The species name is derived from the region of Sofia in northern Madagascar where these statoblasts were collected.</p> Material examined <p> <b>Holotype</b></p> <p>MADAGASCAR • Statoblast valves; Mahajanga Province, Sofia Region, Bealanana District, Marotolana Village, Lake Sofia; 14°35′04″ S, 49º00′30″ E; Sep. 2019; L. Unger leg.; NHMUK 2023.1.17.2, slide collection.</p> Description <p>Floatoblasts broadly oval and rounded at the poles, somewhat variable in shape and size (Fig. 4a), length 474–573 µm with average of 529 µm, width 252–326 µm with average of 296 µm (n = 4), length: width averaging 1.79; ventral valve more convex than dorsal one; dorsal fenestra slightly oblong to nearly round, encroaching on all sides of the underlying capsule; ventral fenestra matching outline of capsule; tubercles uniformly small and uncrowded on both fenestrae; annulus about three times wider at poles than along sides; suture projecting slightly beyond annulus, giving outer margin slightly serrated appearance (Fig 4b–c).</p> Remarks <p>Most of the statoblasts of this species were intact, but a persistent layer of silt or clay particles obscured many of the surface details.</p>Published as part of <i>Wood, Timothy S., Unger, Lilian Eva & Rasoamihaingo, Laurence, 2023, Bryozoan statoblasts from lake sediments in Madagascar, including two new species, pp. 138-147 in European Journal of Taxonomy 900 (1)</i> on pages 143-144, DOI: 10.5852/ejt.2023.900.2307, <a href="http://zenodo.org/record/10079849">http://zenodo.org/record/10079849</a&gt
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