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185,265 research outcomes, page 1 of 18,527

  • It is well documented that ancient sickle harvesting led to tough rachises, but the other seed dispersal properties in crop progenitors are rarely discussed. The first steps toward domestication are evolutionary responses for the recruitment of humans as dispersers. See...

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  • publication . Article . 2003
    Average-case complexity of single-source shortest-paths algorithms: lower and upper bounds
    Open Access
    Authors:
    Ulrich Meyer;
    Persistent Identifiers

    doi: 10.1016/s0196-6774(03)00046-4

    Publisher: Elsevier BV

    We study the average-case running-time of single-source shortest-path (SSSP) algorithms assuming arbitrary directed graphs with n nodes, m edges, and independent random edge weights uniformly distributed in [0,1]. We give the first label-setting and label-correcting alg...

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  • publication . Article . Other literature type . 2013
    A functional trait-based approach to understand community assembly and diversity–productivity relationships over 7 years in experimental grasslands
    Open Access
    Authors:
    Roscher, Christiane; Schumacher, Jens; Lipowsky, Annett; Gubsch, Marlén; Weigelt, Alexandra; Pompe, Sven; Kolle, Olaf; Buchmann, Nina; Schmid, Bernhard; Schulze, Ernst-Detlef;
    Persistent Identifiers

    doi: 10.1016/j.ppees.2013.02.004 , 10.5167/uzh-81800

    Publisher: Elsevier BV
    Country: Switzerland
    Project: SNSF | Mechanisms underlying pla... (310030E-131193), SNSF | Community history and eco... (31003A_130720)

    a b s t r a c t Several multi-year biodiversity experiments have shown positive species richness-productivity rela- tionships which strengthen over time, but the mechanisms which control productivity are not well understood. We used experimental grasslands (Jena Experim...

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  • publication . Article . 2005
    Anharmonic midinfrared vibrational spectra of benzoic acid monomer and dimer
    Open Access
    Authors:
    Jens Antony; Gert von Helden; Gerard Meijer; Burkhard Schmidt;
    Persistent Identifiers

    doi: 10.1063/1.1947191

    Publisher: AIP Publishing

    Anharmonic vibrational calculations for the benzoic acid monomer and dimer in the mid-IR regime (500...1800 cm-1) are reported. Harmonic frequencies and intensities are obtained at the DFT/B3LYP level of theory employing D95(d,p) and cc-pVTZ basis sets. Anharmonic corre...

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  • publication . Article . 2005
    Erratum to: “TeV γ-radiation from Dark Matter annihilation in the Galactic center” [Phys. Lett. B 607 (2005) 225]
    Open Access
    Authors:
    Dieter Horns;
    Persistent Identifiers

    doi: 10.1016/j.physletb.2005.02.046

    Publisher: Elsevier BV
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  • publication . Preprint . Article . 1997
    Ab initio calculation of the potential energy surface for the dissociation of H_2 on the sulfur covered Pd(100) surface
    Open Access English
    Authors:
    Ching-Ming Wei; Axel Groß; Matthias Scheffler;
    Persistent Identifiers

    doi: 10.1103/physrevb.57.15572

    The presence of sulfur atoms on the Pd(100) surface is known to hinder the dissociative adsorption of hydrogen. Using density-functional theory and the full-potential linear augmented plane-wave method, we investigate the potential energy surface (PES) of the dissociati...

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  • publication . Article . 2010
    Immobilized Chemokine Fields and Soluble Chemokine Gradients Cooperatively Shape Migration Patterns of Dendritic Cells
    Open Access English
    Authors:
    Schumann Kathrin; Lämmermann Tim; Bruckner Markus; Legler Daniel F; Polleux Julien; Spatz Joachim P; Schuler Gerold; Förster Reinhold; Lutz Manfred B; Sorokin Lydia; ...
    Persistent Identifiers

    doi: 10.1016/j.immuni.2010.04.017

    handle: 21.11116/0000-0006-0976-C , 21.11116/0000-0006-0978-A , 11858/00-001M-0000-002C-A89E-0 , 11858/00-001M-0000-0010-3C1F-F

    Publisher: Elsevier Inc.
    Country: Germany
    Project: SNSF | Modulation of dendritic c... (31003A_127474)

    SummaryChemokines orchestrate immune cell trafficking by eliciting either directed or random migration and by activating integrins in order to induce cell adhesion. Analyzing dendritic cell (DC) migration, we showed that these distinct cellular responses depended on the...

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  • publication . Article . 2016
    Collisionless expansion of pulsed radio frequency plasmas. II. Parameter study
    Open Access
    Authors:
    T. Schröder; Olaf Grulke; Thomas Klinger; Roderick Boswell; Christine Charles;
    Persistent Identifiers

    doi: 10.1063/1.4940676

    handle: 11858/00-001M-0000-0029-7846-9 , 11858/00-001M-0000-002D-1792-8 , 11858/00-001M-0000-0029-7848-5

    Publisher: AIP Publishing
    Project: EC | EUROfusion (633053)

    The plasma parameter dependencies of the dynamics during the expansion of plasma are studied with the use of a versatile particle-in-cell simulation tailored to a plasma expansion experiment [Schroder et al., J. Phys. D: Appl. Phys. 47, 055207 (2014); Schroder et al., P...

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  • publication . Preprint . Article . 2008
    String order and symmetries in quantum spin lattices
    Open Access English
    Authors:
    Pérez García, David; Wolf, M.M.; Sanz, M.; Verstraete, F.; Cirac, J.I.;
    Persistent Identifiers

    doi: 10.1103/physrevlett.100.167202

    handle: 1854/LU-8589266

    Countries: Spain, Belgium

    We show that the existence of string order in a given quantum state is intimately related to the presence of a local symmetry by proving that both concepts are equivalent within the framework of finitely correlated states. Once this connection is established, we provide...

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  • publication . Article . Preprint . 2012
    Cosmic ray electrons, positrons and the synchrotron emission of the Galaxy: consistent analysis and implications
    Open Access
    Authors:
    Giuseppe Di Bernardo; Carmelo Evoli; Daniele Gaggero; Dario Grasso; Luca Maccione;
    Persistent Identifiers

    doi: 10.1088/1475-7516/2013/03/036

    Publisher: IOP Publishing
    Project: EC | INVISIBLES (289442)

    A multichannel analysis of cosmic ray electron and positron spectra and of the diffuse synchrotron emission of the Galaxy is performed by using the DRAGON code. This study is aimed at probing the interstellar electron source spectrum down to E ~ 1 GeV and at constrainin...

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185,265 research outcomes, page 1 of 18,527