Results 91 to 100 of about 23,533 (297)

Enhancing local ionization in micro-gap atmospheric discharge

New Journal of Physics
Enhancement of local ionization in micro-gap atmospheric dielectric barrier discharges is achieved experimentally via spatiotemporal control combining geometric confinement and harmonic excitation, namely adding a second-order harmonic to the applied ...
Yize Liu, Nicolas Le Thomas, Christophe Leys, Anton Nikiforov   +3 more
doaj   +1 more source

Modulated waveforms for harmonic minimization of far-field signals in amplitude-modulated heating of the ionosphere

Earth and Planetary Physics
This paper establishes an amplitude modulation heating model, simulating the far-field radiation of ELF/VLF signals generated by modulation heating, as well as the specific location and longitudinal extent of the radiation source.
ZhiJian Lu, Yong Li, Hui Li, Jian Wu, JingFeng Yao, XingBao Lyu, ChengXun Yuan, ZhongXiang Zhou, Ying Wang   +8 more
doaj   +1 more source

Nano-plasmonic near field phase matching of attosecond pulses

Scientific Reports, 2017
Nano-structures excited by light can enhance locally the electric field when tuned to plasmonic resonances. This phenomenon can be used to boost non-linear processes such as harmonic generation in crystals or in gases, Raman excitation, and four wave ...
Tahir Shaaran, Rana Nicolas, Bianca Iwan, Milutin Kovacev, Hamed Merdji   +4 more
doaj   +1 more source

Numerical flutter analysis of turbomachinery bladings based on time-linearized, time-spectral and time-accurate simulations

, 2011
Within the European research project FUTURE a transonic compressor rotor has been evaluated with respect to its aeroelastic stability. Based on the identical computational mesh different numerical approaches of the DLR flow solver TRACE and the ONERA ...
Mauffrey, Yann, May, Markus, Sicot, Frédéric   +2 more
core  

Near-field second-harmonic generation in single gold nanoparticles

, 2008
Second-harmonic generation from single gold elliptical nanoparticles is experimentally investigated by a nonlinear scanning near-field optical microscope SNOM.
BIAGIONI, PAOLO, M. ALLEGRINI, P. Biagioni, POLLI, DARIO, P. M. ADAM, CERULLO, GIULIO NICOLA, M. LABARDI, L. Duò, P.-M. Adam, J. GRAND, FINAZZI, MARCO, M. Celebrano, D. Polli, M. Finazzi, M. Zavelani-Rossi, DUO', LAMBERTO, G. Cerullo, CELEBRANO, MICHELE, ZAVELANI ROSSI, MARGHERITA   +18 more
core   +1 more source

Chiral Microneedle Arrays With Terahertz Chiroptical Activity With Chiral‐Plasmon‐Chiral‐Phonon Resonance

Advanced Materials, EarlyView.
ABSTRACT Microneedle arrays (MNAs) is a rapidly emerging technology with broad biomedical applications in drug delivery and biosensing. With sub‐millimeter dimensions and periodicity, MNAs possess geometries nearly ideal for biomedical devices operating within the terahertz (THz) spectral window.
Sang Hyun Lee, Hong Ju Jung, John Kim, Bum Chul Park, Caio V. C. R. da Silva, André F. de Moura, Nicholas A. Kotov   +6 more
wiley   +1 more source

The Design Optimization of a Harmonic-Excited Synchronous Machine Operating in the Field-Weakening Region

World Electric Vehicle Journal
In this paper, the optimization of a harmonic-excited synchronous machine (HESM) is carried out. A two-phase harmonic exciter winding of the HESM provides brushless excitation and sufficient starting torque at any rotor position. The HESM under consideration is intended to be used for applications requiring speed control, especially in the field ...
Vladimir Prakht, Vladimir Dmitrievskii, Vadim Kazakbaev, Eduard Valeev, Victor Goman   +4 more
openaire   +1 more source

Femtosecond time-resolved spectroscopy in polyatomic systems investigated by velocity-map imaging and high-order harmonic generation

, 2013
Dans cette thèse, la dynamique de photodissociation de l'azoture de chlore (ClN3) est étudiée dans le domaine temporel par imagerie de vecteur vitesse des photofragments, spécialement du chlore et de N3.
Städter, David
core  

Harmonic vibration synchronization phenomenon analysis of dual excitation rotors nonlinear vibration system [PDF]

, 2014
Based on the electromechanical coupling nonlinear dynamic model of nonlinear vibration system that driven by dual excitation rotors, the theoretical analysis of the harmonic vibration synchronization conditions for dual excitation rotors have been ...
Xiaohao Li, Tao Shen
core  

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source