Results 71 to 80 of about 1,655,397 (298)

Effective magnetic fields in degenerate atomic gases induced by light beams with orbital angular momenta [PDF]

, 2005
We investigate the influence of two resonant laser beams on the mechanical properties of degenerate atomic gases. The control and probe beams of light are considered to have Orbital Angular Momenta (OAM) and act on the three-level atoms in the ...
A. B. Matsko, A. Klein, D. McGloin, E. Arimondo, G. Juzeliūnas, J. Ruseckas, L. Allen, L. Pitaevskii, M.-O. Mewes, P. Öhberg, R. Jackiw   +10 more
core   +2 more sources

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Combined Traction and Energy Recovery Motor for Electric Vehicles [PDF]

, 2014
Electric vehicle manufacturers are looking for ways to optimize energy use for vehicle range extension and reduction of battery capacity. Electric motors have lower efficiencies at very low speed and high torque.
Kansaku, Claude, Long, James, Moravec, Brian, Wang, Xin   +3 more
core   +2 more sources

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source

Analysis of control-oriented wake modeling tools using lidar field results [PDF]

Wind Energy Science, 2018
The objective of this paper is to compare field data from a scanning lidar mounted on a turbine to control-oriented wind turbine wake models. The measurements were taken from the turbine nacelle looking downstream at the turbine wake.
J. Annoni, P. Fleming, A. Scholbrock, J. Roadman, S. Dana, C. Adcock, F. Porte-Agel, S. Raach, F. Haizmann, D. Schlipf   +9 more
doaj   +1 more source

Spin dynamics in high-mobility two-dimensional electron systems [PDF]

, 2007
Understanding the spin dynamics in semiconductor heterostructures is highly important for future semiconductor spintronic devices. In high-mobility two-dimensional electron systems (2DES), the spin lifetime strongly depends on the initial degree of spin ...
B. Dareys, B. Liu, D. Stich, D. Stich, D. Stich, D. Stich, G. Dresselhaus, H. Ohno, I. Zutic, J. Fabian, J. Zhou, J.M. Kikkawa, J.M. Kikkawa, J.M. Kikkawa, M.A. Brand, M.I. D’yakonov, M.M. Glazov, M.Q. Weng, M.Q. Weng, M.Q. Weng, M.Q. Weng, M.W. Wu, N.P. Stern, N.S. Averkiev, N.S. Averkiev, O.Z. Karimov, S. Döhrmann, S. Pfalz, S.A. Crooker, T. Korn, W.J.H. Leyland, Y. Ohno, Y.A. Bychkov   +32 more
core   +2 more sources

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Optical Polarization of $^{13}$C Nuclei in Diamond through Nitrogen-Vacancy Centers [PDF]

, 2010
We determine the polarization of the bulk $^{13}$C nuclear spin system in diamond produced by interaction with optically oriented nitrogen-vacancy (NV-) defect centers. $^{13}$C nuclei are polarized into the higher energy Zeeman state with a bulk-average
Coles, Patrick J., King, Jonathan P., Reimer, Jeffrey A.   +2 more
core   +1 more source

Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition

Advanced Engineering Materials, EarlyView.
A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley   +1 more source

Design of an adaptive PI speed controller for FOC-driven underwater thrusters

Brodogradnja
Underwater thrusters are the primary actuators in marine vehicles. The thruster drive and control methods for these thrusters considerably influence their dynamic response, accuracy, and efficiency.
Kaicheng Shen, Caoyang Yu, Jinrong Zheng, He Zhang, Xianbo Xiang, Lian Lian   +5 more
doaj   +1 more source