Results 81 to 90 of about 4,766,046 (338)

Spin currents and spin dynamics in time-dependent density-functional theory [PDF]

, 2001
We derive and analyse the equation of motion for the spin degrees of freedom within time-dependent spin-density-functional theory (TD-SDFT). Results are (i) a prescription for obtaining many-body corrections to the single-particle spin currents from the ...
A. D. Becke, B. L. Györffy, B. L. Györffy, D. D. Awschalom, D. M. Edwards, E. K. U. Gross, E. M. Lifshitz, E. Runge, G. A. Prinz, G. M. Stocks, G. Vignale, G. Vignale, J. A. Katine, J. C. Egues, J. C. Slonczewski, J. Dobson, J. P. Perdew, J. Sticht, K. Capelle, K. Capelle, L. M. Sandratskii, P. Hessler, Q. Niu, R. Fiederling, R. Gebauer, R. M. Dreizler, S. V. Halilov, V. P. Antropov, V. P. Antropov   +28 more
core   +2 more sources

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Three-dimensional Disk-Planet Torques in a Locally Isothermal Disk

, 2010
We determine an expression for the Type I planet migration torque involving a locally isothermal disk, with moderate turbulent viscosity (~0.0005 < alpha < ~0.05), based on three-dimensional nonlinear hydrodynamical simulations.
Baruteau, Casoli, D'Angelo, D'Angelo, Davis, Gennaro D'Angelo, Godon, Jang-Condell, Kley, Li, Lubow, Lynden-Bell, Masset, Masset, Matsumura, Menou, Ogilvie, Rafikov, Stephen H. Lubow, Tanaka, Ward, Yu   +21 more
core   +1 more source

Impact of Sustainable Binders Based on Lignin and Collagen on the Volume Stability and Mechanical Properties of MgO‐C Refractories with MgO‐C Recyclates

Advanced Engineering Materials, EarlyView.
Collagen hydrolysate is evaluated as a sustainable binder for MgO‐C refractories. Its thermally induced cross‐linking and gas release lead to expansion and cracking in large bricks, but tailored batches with lignin, recyclates, or fine graphite improve the gas release while thermal treatment and stability.
Till M. J. Stadtmüller, Florian Kerber, Kirsten Moritz, Steffen Dudczig, Konstantin Kraushaar, Thomas Schemmel, Jana Hubálková, Patrick Gehre, Christos G. Aneziris   +8 more
wiley   +1 more source

Enhancing Power Density in Switched Reluctance Generators Through Split Axial Segmentation

IEEE Access
The main contribution of this paper is to propose a methodology for the electromagnetic design of split axial segmentation switched reluctance generators (SRGs) to optimize power and torque.
Parlin Siagian, Ira Devi Sara, Tarmizi Tarmizi, Nasaruddin Nasaruddin   +3 more
doaj   +1 more source

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

Advanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich, Lenka Kunčická, Pavel Czernek, Zifan Wang   +3 more
wiley   +1 more source

Design Considerations of Switched Flux Memory Machine with Partitioned Stators

Energies, 2019
This paper presents general design considerations of a partitioned stator switched flux hybrid magnet memory machine (PS-SF-HMMM). The armature windings and permanent magnets (PMs) are placed on two separate stators, respectively, in the PS-SF-HMMM, and ...
Jiaxing Lei, Chaofan Wei, Hui Yang, Hao Zheng, Wenjia Wang, Shuang Feng   +5 more
doaj   +1 more source

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

Advanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund, Arthur Schulz, Peter Lunkenheimer, Maryana Kraft, Thomas Bergler, Harald Oberhofer, Dirk Volkmer   +6 more
wiley   +1 more source

Design of high torque density motors for quadruped robot hip joints

Xibei Gongye Daxue Xuebao
In response to the high torque density performance requirements for the hip joints of quadruped robots, an analytical design method for permanent magnet synchronous motors with the goal of increasing motor torque density is proposed in this study. A high
YANG Heming, LIANG Bo, DOU Manfeng, DANG Mengxi, HUA Zhiguang   +4 more
doaj   +1 more source

Influence analysis of slot parameters and high torque density optimisation for dual redundant permanent magnet motor in aerospace application

, 2020
This study proposes an optimisation approach of high torque density with guaranteed anti-short-circuit performance for the dual redundant permanent magnet synchronous motor (PMSM) in an aerospace application.
Jinquan Xu, Boyi Zhang, Xiaolin Kuang, Hong Guo, Si Guo   +4 more
semanticscholar   +1 more source