Browsing Fakultäten by Title

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  • Krivonos, Sergey; Lechtenfeld, Olaf; Sutulin, Anton (Amsterdam : Elsevier B.V., 2018)
    We propose a new N-extended supersymmetric su(n) spin-Calogero model. Employing a generalized Hamiltonian reduction adopted to the supersymmetric case, we explicitly construct a novel rational n-particle Calogero model ...
  • Lechtenfeld, Olaf; Schwerdtfeger, Konrad; Thürigen, Johannes (Kiew : National Academy of Science of Ukraine, 2011)
    We review the relation of N=4 superconformal multi-particle models on the real line to the WDVV equation and an associated linear equation for two prepotentials, F and U. The superspace treatment gives another variant of ...
  • Louis, Jan; Triendl, Hagen; Zagermann, Marco (New York : Springer, 2015-10-13)
    We classify the N = 4 supersymmetric AdS(5) backgrounds that arise as solutions of five-dimensional N = 4 gauged supergravity. We express our results in terms of the allowed embedding tensor components and identify the ...
  • Kozyrev, Nikolay; Krivonos, Sergey; Lechtenfeld, Olaf; Nersessian, Armen; Sutulin, Anton (College Park, MD : American Physical Society, 2018)
    We present N=4 supersymmetric mechanics on n-dimensional Riemannian manifolds constructed within the Hamiltonian approach. The structure functions entering the supercharges and the Hamiltonian obey modified covariant ...
  • Krivonos, Sergey; Lechtenfeld, Olaf; Sutulin, Anton (College Park (Maryland) : American Physical Society, 2010)
    In this paper we construct the Lagrangian and Hamiltonian formulations of N=4 supersymmetric systems describing the motion of an isospin particle on a conformally flat four-manifold with SO(4) isometry carrying the non-Abelian ...
  • Buhl, Josef-Christian (Delaware : Scientific Research Publishing Inc., 2017)
    NaBH4 sodalites were obtained by two new modified methods of crystallization: (1) autothermal synthesis and (2) crystallization with crossover from gel to melt flow in NaOH flux. Syntheses results were presented according ...
  • Fedoruk, Sergey; Ivanov, Evgeny; Lechtenfeld, Olaf (Heidelberg : Springer Verlag, 2012)
    We elaborate on a novel model of N=4 supersymmetric mechanics with extra spin variables. A dynamical linear (1,4,3) multiplet is coupled to a "semi-dynamical" linear (3,4,1) multiplet representing spin degrees of freedom ...
  • Shaaran, Tahir; Nicolas, Rana; Iwan, Bianca; Kovacev, Milutin; Merdji, Hamed (London : Nature Publishing Group, 2017)
    Nano-structures excited by light can enhance locally the electric field when tuned to plasmonic resonances. This phenomenon can be used to boost non-linear processes such as harmonic generation in crystals or in gases, ...
  • Indris, Sylvio; Heitjans, Paul; Roman, H. Eduardo; Bunde, Armin (College Park, ML : American Physical Society, 2000)
    We study ionic transport in nano- and microcrystalline (1−x)Li2O:xB2O3 composites using standard impedance spectroscopy. In the nanocrystalline samples (average grain size of about 20 nm), the ionic conductivity σdc increases ...
  • Schumacher, Hans W.; Keyser, U.F.; Zeitler, U.; Haug, Rolf J.; Eberl, K. (College Park, MD : American Institute of Physics, 1999)
    An atomic force microscope (AFM) is used to locally deplete the two-dimensional electron gas (2DEG) of a GaAs/AlGaAs heterostructure. The depletion is induced by repeated mechanical scribing of the surface layers of the ...
  • Nonomura, Kazuteru; Loewenstein, Thomas; Michaelis, Esther; Kunze, Peter; Schiek, Manuela; Reemts, Jens; Iwaya, Mirian Yoshie; Wark, Michael; Rathousky, Jiri; Al-Shamery, Katharina; Kittel, Achim; Parisi, Jürgen; Wöhrle, Dieter; Yoshida, Tsukasa; Schlettwein, Derck (Berlin : De Gruyter, 2009)
    Dye-sensitized zinc oxide thin films were prepared, characterized and optimized for applications as photoelectrochemically active electrodes. Conditions were established under which crystalline thin films of ZnO with a ...
  • Ehlert, Nina; Lüßenhop, Tammo; Krüger, Ilka; Feldhoff, Armin; Badar, Muhammad; Müller, Peter P.; Stieve, Martin; Lenarz, Thomas; Behrens, Peter (Berlin: Walter de Gruyter, 2013-05-28)
    Nanoporous silica coatings for drug release purposes were prepared on medical implants. As substrate, we chose Bioverit® II, which is a commercial available glass-mica ceramic implant material. The coating was prepared by ...
  • Behrens, Peter; Ehlert, Nina; Müller, Peter Paul; Stieve, Martin; Lenarz, Thomas (Berlin: Walter de Gruyter, 2013-09-07)
    We have introduced nanoporous silica as a novel biomaterial. Nanoporous silica is non-toxic and biocompatible. It provides a high surface area and pore volume, uniform and tunable pore sizes and the possibility for chemical ...
  • Satalov, Alexandra (Hannover : Gottfried Wilhelm Leibniz Universität, 2017)
    Injuries of the musculoskeletal system, which is made up of the bones of the skeleton, muscles, cartilage, tendons, ligaments, joints and the connective tissue, are among increasing health care issues of the ageing population ...
  • Timpe, Nico; Fullriede, Hendrik; Borchers, Lothar; Stiesch, Meike; Behrens, Peter; Menzel, Henning (Berlin : De Gruyter, 2014)
    The objective of this study was to test whether nanoporous silica nanoparticles can be employed as fillers in dental composite materials to improve their mechanical properties. These nanoporous silica nanoparticles were ...
  • Jahns, Mandy (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)
    Bei vielen biomedizinischen Problemen in einer immer älter werdenden Gesellschaft können Biomaterialien einen wichtigen Beitrag dazu leisten, nicht mehr (voll) funktionsfähige Bestandteile des Körpers zu unterstützen oder ...
  • Kratzer, Domenic; Ludwig-Husemann, Anita; Junges, Katharina; Geckle, Udo; Lee-Thedieck, Cornelia (Lausanne : Frontiers Media S.A., 2019)
    Hematopoietic stem cells (HSCs) are blood forming cells which possess the ability to differentiate into all types of blood cells. T cells are one important cell type HSCs can differentiate into, via corresponding progenitor ...
  • Bittner, Michael (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2018)
    Thermoelectric materials can, reversibly and without any moving parts, convert thermal energy into electrical energy by coupling an entropic and an electrical flux with each other. This ability is becoming increasingly ...
  • Klug, T.; Meyhöfer, R.; Kreye, M.; Hommes, M. (Cambridge : Cambridge University Press, 2008)
    In spite of the fact that since the end of the eighties, the horse chestnut leafminer, Cameraria ohridella, has established itself throughout Europe, native predators such as ants and birds are not attuned to this neozoic ...
  • Sepehrnia, Nasrollah; Fishkis, Olga; Huwe, Bernd; Bachmann, Jörg (Berlin : De Gruyter, 2018)
    The coupled transport of pollutants that are adsorbed to colloidal particles has always been a major topic for environmental sciences due to many unfavorable effects on soils and groundwater. This laboratory column study ...

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