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  • Open Access English
    Authors: 
    Jennifer Schober; Igor Rogachevskii; Axel Brandenburg;
    Project: SNSF | Magnetohydrodynamical dyn... (PR00P2_185863)

    In relativistic magnetized plasmas, asymmetry in the number densities of left- and right-handed fermions, i.e., a non-zero chiral chemical potential mu_5, leads to an electric current along the magnetic field. This causes a chiral dynamo instability for a uniform mu_5, ...

  • Open Access
    Authors: 
    Jennifer Schober; Igor Rogachevskii; Axel Brandenburg;
    Publisher: American Physical Society (APS)
    Project: SNSF | Magnetohydrodynamical dyn... (PR00P2_185863)

    We study the dynamics of magnetic fields in chiral magnetohydrodynamics, which takes into account the effects of an additional electric current related to the chiral magnetic effect in high energy plasmas. We perform direct numerical simulations, considering weak seed m...

  • Publication . Article . Preprint . 2022 . Embargo End Date: 01 Jan 2021
    Open Access
    Authors: 
    Yonghui Lin; Hans-Werner Hammer; Ulf-G. Meißner;
    Publisher: arXiv
    Project: EC | STRONG-2020 (824093)

    We present a combined analysis of the electromagnetic form factors of the nucleon in the space- and timelike regions using dispersion theory. Our framework provides a consistent description of the experimental data over the full range of momentum transfer, in line with ...

  • Open Access
    Authors: 
    Duglas Ugulava; David Zarnadze;
    Publisher: Elsevier BV

    Abstract The equation A u = f with a linear symmetric positive definite operator A : D ( A ) ⊂ H → H having a discrete spectrum and dense image in a complex Hilbert space H is considered. This equation is transferred into the Hilbert space of finite orbits D ( A n ) as ...

  • Open Access
    Authors: 
    Ketevan Janashia; Levan Tvildiani; Tamar Tsibadze; Nikoloz Invia;
    Publisher: Elsevier BV

    Abstract Evolutionarily, a human organism is adapted to the natural geomagnetic environment and its slight alterations. However, during geomagnetic storms (GMSs), the strength of the geomagnetic field (GMF) sharply increased hundreds of times and can pose a serious thre...

  • Publication . Article . Preprint . 2022 . Embargo End Date: 01 Jan 2021
    Open Access
    Authors: 
    Leslie Hogben; Carolyn Reinhart;
    Publisher: arXiv

    Distance matrices of graphs were introduced by Graham and Pollack in 1971 to study a problem in communications. Since then, there has been extensive research on the distance matrices of graphs -- a 2014 survey by Aouchiche and Hansen on spectra of distance matrices of g...

  • Open Access English
    Authors: 
    Krys, Kuba; Yeung, June Chun; Capaldi, Colin A.; Lun, Vivian Miu-Chi; Torres, Claudio; van Tilburg, Wijnand A. P.; Bond, Michael Harris; Zelenski, John M.; Haas, Brian W.; Park, Joonha; +54 more
    Publisher: Taylor and Francis
    Countries: Serbia, Portugal, Netherlands, Italy, Switzerland, United Kingdom, Croatia, Lithuania

    In this paper, we introduce the concept of ‘societal emotional environment’: the emotional climate of a society (operationalized as the degree to which positive and negative emotions are expressed in a society). Using data collected from 12, 888 participants across 49 c...

  • Open Access
    Authors: 
    Saverio Bartolini-Lucenti; Joan Madurell-Malapeira; Bienvenido Martínez-Navarro; Omar Cirilli; Luca Pandolfi; Lorenzo Rook; Maia Bushkhianidze; David Lordkipanidze;
    Publisher: Elsevier BV
    Country: Spain

    Altres ajuts: CERCA Programme/Generalitat de Catalunya The carnivore guild of the Early Pleistocene site of Dmanisi is among the most diverse of the Early Pleistocene of the entire Old World. It includes 14 carnivoran taxa: Homotherium latidens, Megantereon whitei, Pant...

  • Open Access
    Authors: 
    Andria Rogava; Stefaan Poedts; Ekaterine Dadiani;
    Publisher: Elsevier BV

    Abstract The problem of the existence of self-similar solutions for astrophysical magnetohydrodynamic (MHD) transient flows is considered. Our approach is based on the pioneering works by B.C. Low for coronal transients and their further generalizations. The axiomatic b...

  • Open Access
    Authors: 
    Selina Mahler; Irina Shatilova; Angela A. Bruch;
    Publisher: Elsevier BV

    Abstract West Georgia is part of the Caucasus biodiversity hotspot and hosts the Colchic vegetation, a ‘Tertiary’ refuge, with many endemic and relic species. Based on fossil pollen records from 21 localities in west Georgia quantitative climate reconstruction has been ...