Results 81 to 90 of about 215,155 (301)

Cartan's spiral staircase in physics and, in particular, in the gauge theory of dislocations

, 2010
In 1922, Cartan introduced in differential geometry, besides the Riemannian curvature, the new concept of torsion. He visualized a homogeneous and isotropic distribution of torsion in three dimensions (3d) by the "helical staircase", which he constructed
A. Trautman, A. Zeghadi, A.A. García, A.C. Eringen, C. Malyshev, D. Klemm, E. et F. Cosserat, E. Kröner, E. Kröner, E. Kröner, E. Kröner, E.W. Mielke, E.W. Mielke, E.W. Mielke, F. Gronwald, F. Gronwald, F.W. Hehl, F.W. Hehl, F.W. Hehl, F.W. Hehl, F.W. Hehl, Friedrich W. Hehl, G. Capriz, G.A. Maugin, G.A. Maugin, G.A. Maugin, H. Kleinert, H. Schaefer, J.D. Eshelby, J.M. Nester, J.W. Maluf, K.F. Shie, M. Bañados, M. Kleman, M. Lazar, M. Lazar, M. Lazar, M. Lazar, M. Lazar, M. Lazar, M. Lazar, M. Lazar, M. Lazar, M.L. Ruggiero, M.O. Katanaev, M.O. Katanaev, Markus Lazar, O. Costa de Beauregard, P. Baekler, P. Baekler, R.A. Puntigam, S. Carlip, W. Günther, W. Jaunzemis, W. Voigt, É. Cartan, É. Cartan   +56 more
core   +1 more source

Flexibility and Dynamicity Enhances and Controls Supramolecular Self‐Assembly of Zinc(II) Metallogels

Advanced Functional Materials, EarlyView.
Zinc(II) coordination complexes with tunable aryloxy‐imine ligands exhibit controllable supramolecular self‐assembly into hierarchical fibrous structures. Coordination‐driven stacking, not π–π interactions, enables gelation, dynamic assembly/disassembly, and enhanced nanomechanical properties.
Merlin R. Stühler, Hesam Makki, Dorothee Silbernagl, Mathias Dimde, Kai Ludwig, Bengt E. Tegner, Christopher Greve, Konstantin Rausch, Eva M. Herzig, Anna Köhler, Alex J. Plajer   +10 more
wiley   +1 more source

Surface tension problems with distributed torque [PDF]

WIT Transactions on Engineering Sciences, 2013
M. Reivinen, E.-M. Salonen
openaire   +4 more sources

Driving Control Strategy and Specification Optimization for All-Wheel-Drive Electric Vehicle System with a Two-Speed Transmission

World Electric Vehicle Journal
Equipping electric vehicles with a two-speed gearbox allows for achieving high torque and maximum speed through appropriate gear ratio adjustments.
Jeonghyuk Kim, Jihyeok Ahn, Seyoung Jeong, Young-Geun Park, Hyobin Kim, Dongwook Cho, Sung-Ho Hwang   +6 more
doaj   +1 more source

Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry

Advanced Functional Materials, EarlyView.
In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite, Lilia Huynh, Natascha Gray, Quintin N. Meier, Marta D. Rossell, Morgan Trassin   +5 more
wiley   +1 more source

Disk-satellite interaction in disks with density gaps

, 2012
Gravitational coupling between a gaseous disk and an orbiting perturber leads to angular momentum exchange between them which can result in gap opening by planets in protoplanetary disks and clearing of gas by binary supermassive black holes (SMBHs ...
Armitage, Bryden, Cristobal Petrovich, D'Angelo, D'Angelo, Dong, Dong, Duffell, Goldreich, Goodman, Gould, Lin, MacFadyen, Masset, Matsumura, Menou, Muto, Narayan, Rafikov, Rafikov, Rafikov, Roedig, Roman R. Rafikov, Shi, Trilling, Varniére   +25 more
core   +1 more source

A Toy Model for Blandford-Znajek Mechanism [PDF]

, 1999
A toy model for the Blandford-Znajek mechanism is investigated: a Kerr black hole with a toroidal electric current residing in a thin disk around the black hole.
B. Carter, B. Linet, B. Paczyński, B. Paczyński, C. F. Gammie, D. A. Macdonald, D. Macdonald, I. D. Novikov, J. A. Petterson, J. Bicak, J. Krolik, K. S. Thorne, Li-Xin Li, M. C. Begelman, M. J. Rees, M. Livio, P. Ghosh, P. J. Armitage, R. D. Blandford, R. D. Blandford, R. D. Blandford, R. L. Znajek, R. Penrose, S. E. Wooseley   +23 more
core   +3 more sources

Optimal Torque Distribution Algorithm for Redundant Reaction Wheels

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 2005
In attitude control of spacecraft using more than three reaction wheels, the distribution of the attitude control torque to the wheels is not unique because of the redundancy. Usually, the wheel torque distribution is given by multiplying a constant matrix to the control torque, but more efficient distribution method using the redundancy is desired for
Takehiro NISHIYAMA, Katsuhiko YAMADA
openaire   +1 more source

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

Advanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

Domain Wall Rebounds Driven by Competing Entropic and Spin‐Transfer Torques in Cylindrical Nanowires

Advanced Functional Materials, EarlyView.
Domain‐wall motion in cylindrical magnetic nanowires driven by nanosecond current pulses. Low current densities efficiently displace domain walls, whereas higher currents cause rebound at the wire ends. The effect results from the interplay between spin‐transfer torque and thermally induced processes, highlighting the role of thermal gradients in ...
Elias Saugar, Jorge Marqués‐Marchán, Sara Catalano, Agustina Asenjo, Michael Foerster, Miguel Angel Niño, Manuel Vazquez, Fèlix Casanova, Arantxa Fraile Rodríguez, Rafael P. Del Real, Oksana Chubykalo‐Fesenko, Cristina Bran   +11 more
wiley   +1 more source