Results 111 to 120 of about 306,747 (282)

Very High Precision Determination of Low-Energy Parameters: The 2-d Heisenberg Quantum Antiferromagnet as a Test Case

, 2010
The 2-d spin 1/2 Heisenberg antiferromagnet with exchange coupling $J$ is investigated on a periodic square lattice of spacing $a$ at very small temperatures using the loop-cluster algorithm.
Jiang, F. -J., Wiese, U. -J.
core   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Reduction of friction by normal oscillations. I. Influence of contact stiffness

Friction, 2017
The present paper is devoted to a theoretical analysis of sliding friction under the influence of oscillations perpendicular to the sliding plane. In contrast to previous works we analyze the influence of the stiffness of the tribological contact in ...
M. Popov, V. L. Popov, N. V. Popov
doaj   +1 more source

Spin-up of low mass classical bulges in barred galaxies

, 2011
Secular evolution is one of the key routes through which galaxies evolve along the Hubble sequence. Not only the disk undergoes morphological and kinematic changes, but also a preexisting classical bulge may be dynamically changed by the secular ...
Aguerri, Ann, Athanassoula, Athanassoula, Athanassoula, Athanassoula, Athanassoula, Baugh, Bertola, Binney, Binney, Binney, Bournaud, Cappellari, Colín, Combes, Combes, Davies, Debattista, Dubinski, Eggen, El-Zant, Elmegreen, Erwin, Evans, Fall, Franx, Gadotti, Gerhard, Hernquist, Holley-Bockelmann, Hopkins, Hopkins, Illingworth, Immeli, Inma Martinez-Valpuesta, Jesseit, Kanak Saha, Katz, Kauffmann, Kereš, King, Kormendy, Kormendy, Kormendy, Kuijken, Laurikainen, Lynden Bell, Marinova, Martinez-Valpuesta, Martinez-Valpuesta, McMillan, Menéndez-Delmestre, Mo, Morelli, Méndez-Abreu, Nieto, Nowak, Ortwin Gerhard, Pfenniger, Raha, Saha, Sellwood, Sellwood, Sellwood, Sellwood, Sellwood, Sellwood, Shen, Springel, Springel, Stark, Toomre, Tremaine, Villa Vargas, Weinberg, Weinberg, Weinberg, Weinberg, White, Widrow, Zoccali, Zoccali   +82 more
core   +1 more source

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

On the 2D Dirac oscillator in the presence of vector and scalar potentials in the cosmic string spacetime in the context of spin and pseudospin symmetries

, 2019
The Dirac equation with both scalar and vector couplings describing the dynamics of a two-dimensional Dirac oscillator in the cosmic string spacetime is considered.
Andrade, Fabiano M., Castro, Luis B., Filgueiras, Cleverson, Lima, Daniel F., Silva, Edilberto O.   +4 more
core   +1 more source

Double Helical Plasmonic Antennas

Advanced Functional Materials, EarlyView.
Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin, Luka Zurak, Krzysztof Maćkosz, Lorenz Löffler, Victor Deinhart, Ivo Utke, Thorsten Feichtner, Katja Höflich   +7 more
wiley   +1 more source

Prediction of ball and roller bearing thermal and kinematic performance by computer analysis [PDF]

Characteristics of good computerized analysis software are suggested. These general remarks and an overview of representative software precede a more detailed discussion of load support system analysis program structure.
Kleckner, R. J., Pirvics, J.
core   +1 more source

Bidirectional drive and brake mechanism [PDF]

, 1991
A space transport vehicle is disclosed as including a body which is arranged to be movably mounted on an elongated guide member disposed in outer space and driven therealong.
Swan, Scott A.
core   +1 more source

Cylindrical symmetric, non-rotating and non-static or static black hole solutions and the naked singularities

, 2019
In this work, a four-dimensional cylindrical symmetric and non-static or static space-times in the backgrounds of anti-de Sitter (AdS) space with perfect stiff fluid, anisotropic fluid and electromagnetic field as the stress-energy tensor, is presented ...
Ahmed, Faizuddin
core   +1 more source