Results 111 to 120 of about 4,766,046 (338)

Dependence of the Spin Transfer Torque Switching Current Density on the Exchange Stiffness Constant

, 2012
We investigate the dependence of the switching current density on the exchange stiffness constant in the spin transfer torque magnetic tunneling junction structure with micromagnetic simulations.
You, Chun-Yeol
core   +1 more source

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

Advanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky, Tuo Zhao, Glaucio H. Paulino, Emily C. Davidson   +3 more
wiley   +1 more source

Force and torque acting on particles in a transitionally rough open channel flow

, 2011
Direct numerical simulation of open channel flow over a geometrically rough wall has been performed at a bulk Reynolds number of approximately 2900. The wall consisted of a layer of spheres in a square arrangement. Two cases have been considered.
Bayazit, Clemens Chan-Braun, Detert, Manuel García-Villalba, Markus Uhlmann, Nezu, Nikuradse, Pokrajac, Schlichting, Shields, Townsend, Uhlmann, Uhlmann, van Rijn   +13 more
core   +1 more source

Universal Electronic‐Structure Relationship Governing Intrinsic Magnetic Properties in Permanent Magnets

Advanced Functional Materials, EarlyView.
Permanent magnets derive their extraordinary strength from deep, universal electronic‐structure principles that control magnetization, anisotropy, and intrinsic performance. This work uncovers those governing rules, examines modern modeling and AI‐driven discovery methods, identifies critical bottlenecks, and reveals electronic fingerprints shared ...
Prashant Singh
wiley   +1 more source

A Novel Stator Tooth Shape of Axial Flux Permanent Magnet Motors Based on Soft Magnetic Composite for Torque Density Enhancement

IEEE Access
This paper proposes a pyriform stator tooth body shape of axial flux permanent magnet motors (AFPMMs) based on soft magnetic composite (SMC) to enhance torque density.
Lijian Wu, Xiaofeng Ren, Fangwei Zhao, Zhenyang Zhang, Shuai Ge, Yao Li   +5 more
doaj   +1 more source

Diffusive spin dynamics in ferromagnetic thin films with a Rashba interaction

, 2012
In a ferromagnetic metal layer, the coupled charge and spin diffusion equations are obtained in the presence of both Rashba spin-orbit interaction and magnetism.
Aurelien Manchon, I. M. Miron, M. I. D’yakonov, Xuhui Wang, Yu. A. Bychkov   +4 more
core   +1 more source

Tidal torques and local density maxima [PDF]

Monthly Notices of the Royal Astronomical Society, 1988
A. Heavens, J. Peacock
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

Design of a Concentrically Stacked Modular Actuator with Forced Air Cooling for Multi-DOF Robotic Systems

Energies, 2018
This paper proposes a concentrically stacked modular (CoSMo) actuator with rotary electric motors to implement multi-degree-of-freedom (multi-DOF) robotic systems with high power densities.
Jaeho Noh, Jaeyong Lee, Woosung Yang, Sungon Lee   +3 more
doaj   +1 more source

Self-regulated gravitational accretion in protostellar discs

, 2007
We present a numerical model for the evolution of a protostellar disc that has formed self-consistently from the collapse of a molecular cloud core. The global evolution of the disc is followed for several million years after its formation.
Andrews, Balbus, Basu, Binney, Chiang, E. I. Vorobyov, Fukagawa, Gammie, Garaud, Glassgold, Goldreich, Goodman, Grady, Hartmann, Hartmann, Larson, Laughlin, Lodato, Lodato, Lodato, Pickett, Polyachenko, Saigo, Scholz, Shantanu Basu, Stone, Tomley, Toomre, Turner, Vorobyov, Vorobyov, Vorobyov, Vorobyov, Weidenschilling   +33 more
core   +1 more source