Results 91 to 100 of about 806,308 (335)

A Frame Bundle Generalization of Multisymplectic Momentum Mappings

, 2001
This paper presents generalized momentum mappings for covariant Hamiltonian field theories. The new momentum mappings arise from a generalization of symplectic geometry to $L_VY$, the bundle of vertically adapted linear frames over the bundle of field ...
Abraham, Fulp, Fulp, Gotay, Gotay, J.K Lawson, Kijowski, Kijowski, Kobayashi, Lawson, López, Marsden, McLean, Milnor, Nijenhuis, Norris, Norris, Norris, Norris, Schouten   +19 more
core   +2 more sources

Chirality and Organization of Adsorbates Modify Surface Phonon Dynamics

Advanced Functional Materials, EarlyView.
Chirality and molecular organization are shown to influence surface phonon dynamics in gold films. Time‐resolved Joule heating measurements reveal that ordered homochiral monolayers increase the Debye temperature and disordered layers reduce it, while ordered racemic controls have no effect.
Meital Ozeri, Eugenia Pyurbeeva, Shira Yochelis, Jonas Fransson, Ronnie Kosloff, Oded Millo, Yossi Paltiel   +6 more
wiley   +1 more source

Laser‐Assisted Processing and Modification of Bioactive Glasses: A Review

Advanced Healthcare Materials, EarlyView.
Laser technologies provide powerful tools to process and transform bioactive glasses for advanced biomedical applications. This review discusses laser‐matter interaction mechanisms, laser surface engineering, and laser‐assisted fabrication of scaffolds and nanofibers.
Antonio Riveiro, Mario González‐Quintas, Mónica Fernández‐Arias, Jesús del Val, Félix Quintero, Rafael Comesaña, Fernando Lusquiños, Julian R. Jones, Juan Pou   +8 more
wiley   +1 more source

Is orbital angular momentum always conserved in spontaneous parametric down-conversion?

, 2007
In the non-linear optical process of type-II spontaneous parametric down-conversion, we present on an experiment showing that the two-photon detection amplitude of the down-converted beams does not generally reproduce the transverse profile of the pump ...
Barbosa, Geraldo A., Chen, Chao-Hsiang, Feng, Sheng, Kumar, Prem   +3 more
core   +1 more source

Microengineered Gradient Hydrogels for Mechanobiology

Advanced Healthcare Materials, EarlyView.
Gradient hydrogels are used to mimic the mechanical heterogeneity in native tissues, offering powerful in vitro platforms to study cell‐material interactions in diverse pathophysiological contexts. Here, we present a comprehensive review of the design and experimental considerations for stiffness gradient hydrogels, discussing exemplary achievements ...
Shin Wei Chong, Deepu Ashok, Anna Waterhouse, Marcela M. M. Bilek, Daniele Vigolo   +4 more
wiley   +1 more source

Neutron Stars in Teleparallel Gravity

, 2013
In this paper we deal with neutron stars, which are described by a perfect fluid model, in the context of the teleparallel equivalent of general relativity.
A Akmal, A Burrows, A Einstein, A Hewish, A Komar, A Maeder, B Mashhoon, B Mashhoon, CP Lorenz, F Pacini, GB Cook, H Komatsu, H Stephani, HA Bethe, JF da Rocha Neto, JL Friedman, JR Oppenheimer, JW Maluf, JW Maluf, JW Maluf, JW Maluf, JW Maluf, JW Maluf, JW Maluf, JW Maluf, JW Maluf, JW Maluf, JW Maluf, KS Thorne, L Ferrari, L Lindblom, M Baldo, M Campanelli, M Shibata, N Stergioulas, P Arras, P. M. M. Rocha, R Arnowitt, R d’Inverno, RC Tolman, S Weinberg, S. C. Ulhoa, SA Shapiro, SC Ulhoa, SC Ulhoa, T Gold, T Nozawa, VR Pandharipande, VR Pandharipande, VS Geroyannis, VV Usov   +50 more
core   +1 more source

Artificial Intelligence‐Assisted Workflow for Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling

Advanced Materials, EarlyView.
AI‐Assisted Workflow for (Scanning) Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling. Abstract (Scanning) transmission electron microscopy ((S)TEM) has significantly advanced materials science but faces challenges in correlating precise atomic structure information with the functional properties of ...
Marc Botifoll, Ivan Pinto‐Huguet, Enzo Rotunno, Thomas Galvani, Catalina Coll, Payam Habibzadeh Kavkani, Maria Chiara Spadaro, Yann‐Michel Niquet, Martin Børstad Eriksen, Sara Martí‐Sánchez, Georgios Katsaros, Giordano Scappucci, Peter Krogstrup, Giovanni Isella, Andreu Cabot, Gonzalo Merino, Pablo Ordejón, Stephan Roche, Vincenzo Grillo, Jordi Arbiol   +19 more
wiley   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Waves on mazes

Journal of High Energy Physics
One way to describe the entropy of black holes comes from partitioning momentum charge across fractionated intersecting brane systems. Here we construct 1 8 $$ \frac{1}{8} $$ -BPS solutions by adding momentum to a maze of M2-brane strips stretched ...
Iosif Bena, Raphaël Dulac, Anthony Houppe, Dimitrios Toulikas, Nicholas P. Warner   +4 more
doaj   +1 more source

A Quasigroup Approach for Conservation Laws in Asymptotically Flat Spacetimes

Universe
In the framework of the quasigroup approach to conservation laws in general relativity, we show how the infinite-parametric Newman–Unti group of asymptotic symmetries can be reduced to the Poincaré quasigroup. We compute Noether’s charges associated with
Alfonso Zack Robles, Alexander I. Nesterov, Claudia Moreno   +2 more
doaj   +1 more source