Results 31 to 40 of about 372,868 (297)

Selective RF wireless control of integrated bulk-micromachined shape-memory-alloy actuators and its microfluidic application [PDF]

, 2011
This paper reports wireless microfluidic control enabled by selective operation of multiple bulk-micromachined shape-memory-alloy actuators using radiofrequency external magnetic fields.
Mohamed Ali, Mohamed Sultan, Takahata, Kenichi   +1 more
core   +1 more source

Sub-wavelength phononic crystal liquid sensor [PDF]

, 2011
We introduce an acoustic liquid sensor based on phononic crystals consisting of steel plate with an array of holes filled with liquid. We both theoretically and experimentally demonstrate sensor properties considering the mechanism of the extraordinary ...
Ke, Manzhu, Lucklum, Ralf, Zubtsov, Mikhail   +2 more
core   +1 more source

Design, Modeling and Experimental Validation of a Variable Resonant Electro-Hydraulic Fatigue Testing System

IEEE Access, 2019
High frequency excitation in the electro-hydraulic mode, especially kilohertz regime, has already been realized owing to the merits of specially designed two-dimensional rotary valve (2D rotary valve).
Yan Ren, Jiping Bai, Jian Ruan
doaj   +1 more source

Universality in three-frequency resonances [PDF]

Physical Review E, 1999
We investigate the hierarchical structure of three-frequency resonances in nonlinear dynamical systems with three interacting frequencies. We hypothesize an ordering of these resonances based on a generalization of the Farey tree organization from two frequencies to three.
Cartwright, Julyan H. E., González, Diego L., Piro, Oreste   +2 more
openaire   +3 more sources

On the validity of nonlinear Alfvén resonance in space plasmas [PDF]

, 2008
Aims. In the approximation of linear dissipative magnetohydrodynamics (MHD), it can be shown that driven MHD waves in magnetic plasmas with high Reynolds number exhibit a near resonant behaviour if the frequency of the wave becomes equal to the local ...
Arregui, Aschwanden, Aschwanden, Ballai, Ballai, Braginskii, C. T. M. Clack, Clack, DeForest, Erdélyi, Erdélyi, Erdélyi, Goedbloed, Goedbloed, Goossens, Goossens, Goossens, Goossens, I. Ballai, Kai, M. S. Ruderman, Mocanu, Nakariakov, Ofman, Poedts, Poedts, Robbrecht, Ruderman, Ruderman, Ruderman, Ruderman, Ruderman, Sakurai, Terradas, Verth, Verth   +35 more
core   +3 more sources

High-frequency micromechanical columnar resonators [PDF]

Science and Technology of Advanced Materials, 2009
High-frequency silicon columnar microresonators are fabricated using a simple but effective technological scheme. An optimized fabrication scheme was invented to obtain mechanically protected microcolumns with lateral dimensions controlled on a scale of at least 1 μm.
Jenny, Kehrbusch, Elena A, Ilin, Peter, Bozek, Bernhard, Radzio, Egbert, Oesterschulze   +4 more
openaire   +2 more sources

Selective spatial damping of propagating kink wavesto resonant absorption [PDF]

, 2010
There is observational evidence of propagating kink waves driven by photospheric motions. These disturbances, interpreted as kink magnetohydrodynamic (MHD) waves are attenuated as they propagate upwards in the solar corona.
Andries, Andries, Arregui, Arregui, Arregui, Aschwanden, Aschwanden, Aschwanden, Aschwanden, Berghmans, Brady, De Moortel, De Pontieu, De Pontieu, Dymova, Díaz, Edwin, Erdélyi, Fujimura, G. Verth, Goossens, Goossens, Goossens, Goossens, Goossens, Goossens, He, Heyvaerts, Hollweg, Ionson, J. Terradas, Jess, Lin, M. Goossens, McLaughlin, Morton, Nakariakov, Ofman, Ofman, Ofman, Okamoto, Pascoe, Poedts, Roberts, Roberts, Ruderman, Ruderman, Ruderman, Sakurai, Selwa, Selwa, Smith, Soler, Soler, Steinolfson, Tagger, Terradas, Terradas, Terradas, Tirry, Tirry, Tirry, Tomczyk, Tomczyk, Uchida, Van Doorsselaere, Van Doorsselaere, Vasheghani Farahani, Verth, Verth, Verth, Verth, Verwichte, Verwichte   +73 more
core   +2 more sources

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

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

Three-Phase Series Resonant DC-DC Boost Converter With Double LLC Resonant Tanks and Variable Frequency Control

IEEE Access, 2020
This paper proposes a three-phase inverter combined with two LLC resonant tanks series resonant DC-DC boost converter with variable frequency control. The three-phase inverter side of the proposed circuit is connected to identical two-level LLC tanks to ...
Mohamed Salem, Vigna K. Ramachandaramurthy, Awang Jusoh, Sanjeevikumar Padmanaban, Mohamad Kamarol, Jiashen Teh, Dahaman Ishak   +6 more
doaj   +1 more source