Results 31 to 40 of about 3,764,170 (250)

Energy harvesting from vibrations with a nonlinear oscillator [PDF]

, 2009
In this paper we present a nonlinear electromagnetic energy harvesting device that has a broadly resonant response. The nonlinearity is generated by a particular arrangement of magnets in conjunction with an iron-cored stator.
Clare, Lindsay R., Lindsay R. Clare, Barton, Davi A W, Clare, LR, Barton, DAW, Burrow, Stephen G., Burrow, Stephen G, David A. W. Barton, Barton, David A.W., Clare, Lindsa, R., Burrow, SG, Stephen G. Burrow   +11 more
core   +1 more source

Thin Dielectric Layers Evaluation Using Tunable Split-Ring Resonator Based Metasurface in THz Frequency Range

Applied Sciences, 2022
The paper presents the evaluation of thin dielectric layers using a tunable split-ring resonator-based metasurface in the THz frequency range. Tunable unit cells of a metasurface allow its resonant frequency variation using some external excitation. This
Paulina Gora, Przemyslaw Lopato
doaj   +1 more source

Frequency conversion based on three-wave parametric solitons [PDF]

, 2010
Parametric three-wave mixing in quadratic nonlinear crystals provides a versatile means of achieving widely tunable frequency conversion of laser light, thus permitting a substantial extension of the wavelength coverage of laser sources across broad ...
Degasperis, Antonio, A. DE GASPERIS, de Angelis, Costantino, Wabnitz, Stefan, DE ANGELIS C, Lombardo, Sara, S. LOMBARDO, CONFORTI M, DE GASPERIS, Antonio, Baronio, Fabio, Matteo Conforti, BARONIO F, Stefan Wabnitz, Sara Lombardo, Costantino De, Conforti, Matteo, Fabio Baronio, Antonio Degasperis   +17 more
core   +1 more source

Strategies for increasing the operating frequency range of vibration energy harvesters: a review

, 2009
This paper reviews possible strategies to increase the operational frequency range of vibration-based micro-generators. Most vibration-based micro-generators are spring-mass-damper systems which generate maximum power when the resonant frequency of the ...
Beeby, Steve, Zhu, Dibin, Tudor, John, Stephen P Beeby, Michael J Tudor, Dibin Zhu   +5 more
core   +1 more source

Enhancement of a New Methodology Based on the Impulse Excitation Technique for the Nondestructive Determination of Local Material Properties in Composite Laminates

Applied Sciences, 2020
A new approach for the nondestructive determination of the elastic properties of composite laminates is presented. The approach represents an improvement of a recently published experimental methodology based on the Impulse Excitation Technique, which ...
Carlo Boursier Niutta
doaj   +1 more source

A frequency-accurate discrete proportional–resonant control strategy for grid simulators

Frontiers in Energy Research
Accurate sinusoidal-voltage reproduction is essential for converter-based grid simulators used to evaluate renewable-energy and energy-storage equipment under normal and abnormal grid conditions.
Zhichao Xue, Jinru Hu, Hongfeng Li, Hongfeng Li, Xudong Lu, Shishan Dong, Shishan Dong, Xiuyuan Wu, Fei Lin   +8 more
doaj   +1 more source

High-frequency Alfven waves in multi-ion coronal plasma : observational implications [PDF]

, 2005
We investigate the effects of high-frequency (of order ion gyrofrequency) Alfvén and ion-cyclotron waves on ion emission lines by studying the dispersion of these waves in a multi-ion coronal plasma.
Ofman, L. (Leon), Davila, J. M. (Joseph M.), Viñas, A.-F., Nakariakov, V. M. (Valery M.), V. M. Nakariakov, J. M. Davila, L. Ofman, A.-F. Viñas   +7 more
core   +1 more source

Chemotherapy for Spinal Cord Intramedullary Pediatric Low‐Grade Glioma—A Systematic Literature Review

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric intramedullary low‐grade gliomas (PIMLGGs) are rare neoplasms that present unique clinical and management challenges. Although surgery remains the primary tool for tissue diagnosis and decompression, complete gross‐total resection is frequently unfeasible due to the infiltrative nature of these lesions.
Olga M. Sergeenko, Segev Gabay, Jonathan Roth, Amit Ringel, Rina Dvir, Shlomi Constantini   +5 more
wiley   +1 more source

Mitigation of power system forced oscillations based on unified power flow controller

Journal of Modern Power Systems and Clean Energy, 2018
Forced oscillations (FOs), or low-frequency oscillations (LFOs) caused by periodic, continuous, small power disturbances, threaten the security and stability of power systems.
Ping JIANG, Zikai FAN, Shuang FENG, Xi WU, Hui CAI, Zhenjian XIE   +5 more
doaj   +1 more source

Spin noise spectroscopy of rubidium atomic gas under resonant and non-resonant conditions [PDF]

, 2016
The spin fluctuation in rubidium atom gas is studied via all-optical spin noise spectroscopy (SNS). Experimental results show that the integrated SNS signal and its full width at half maximum (FWHM) strongly depend on the frequency detuning of the probe ...
Yang Ji, Xuan Qian, Ji, Yang, Ma, Jian, Wei Li, Li, Wei, Ping Shi, Jian Ma, Shi, Ping, Qian, Xuan   +9 more
core   +1 more source