Results 21 to 30 of about 7,995,389 (202)

Fast Compact Laser Shutter Using a Direct Current Motor and 3D Printing [PDF]

, 2015
We present a mechanical laser shutter design that utilizes a DC electric motor to rotate a blade which blocks and unblocks a light beam. The blade and the main body of the shutter are modeled with computer aided design (CAD) and are produced by 3D ...
Braverman, Boris, Kawasaki, Akio, Vuletić, Vladan, Zhang, Grace H.   +3 more
core   +2 more sources

An Energy-Efficient ADO-OFDM System for Optical Wireless Communication

IEEE Photonics Journal, 2023
This paper proposes an energy-efficient asymmetrically clipped direct-current (DC) biased optical orthogonal frequency division multiplexing (EEADO-OFDM) scheme, which replaces the fixed DC bias of DC biased optical OFDM (DCO-OFDM) branch with a adaptive
Wei-Wen Hu
doaj   +1 more source

Implantable Direct Current Neural Modulation: Theory, Feasibility, and Efficacy

Frontiers in Neuroscience, 2019
Implantable neuroprostheses such as cochlear implants, deep brain stimulators, spinal cord stimulators, and retinal implants use charge-balanced alternating current (AC) pulses to recover delivered charge and thus mitigate toxicity from electrochemical ...
Felix P. Aplin, Gene Y. Fridman, Gene Y. Fridman, Gene Y. Fridman   +3 more
doaj   +1 more source

Transcutaneous Spinal Direct Current Stimulation [PDF]

Frontiers in Psychiatry, 2012
In the past 10 years renewed interest has centered on non-invasive transcutaneous weak direct currents applied over the scalp to modulate cortical excitability ("brain polarization" or transcranial direct current stimulation, tDCS). Extensive literature shows that tDCS induces marked changes in cortical excitability that outlast stimulation.
F. Cogiamanian, G. Ardolino, M. Vergari, R. Ferrucci, M. Ciocca, E. Scelzo, S. Barbieri, A. Priori   +7 more
openaire   +3 more sources

Dielectric characteristic of dichlorodifluoromethane (R12) gas and mixture with [inline-formula]/air as an alternative to [inline-formula] gas

High Voltage, 2017
In this study, dichlorodifluoromethane (R12) gas and mixtures with nitrogen (N(2)) and air at different pressures and mixing ratios have been investigated and showed good alternative to [inline-formula] gas in ...
Rahmat Ullah, Abdur Rashid, Arooj Rashid, Faisal Khan, Amjad Ali   +4 more
doaj   +1 more source

Research on Thyristor Reverse Recovery Behavior in High-Voltage Direct Current Transmission Converter Valves and Its Application in Integrated Protection Systems

Energies
The performance of converter valves is essential for the reliability and efficiency of high-voltage direct current (HVDC) transmission systems. Converter valves consist of multiple thyristor levels, each requiring regular testing to ensure proper ...
Cao Wen, Liang Song, Yu Huang, Dong Peng, Peng Zhang, Jianquan Liao, Longjie Yang, Shilin Gao   +7 more
doaj   +1 more source

Detection of mechanical resonance of a single-electron transistor by direct current [PDF]

, 2010
We have suspended an Al based single-electron transistor whose island can resonate freely between the source and drain leads forming the clamps. In addition to the regular side gate, a bottom gate with a larger capacitance to the SET island is placed ...
Astafiev, O., Hoehne, F., Im, H., Knyazev, D. A., Li, T. F., Nakamura, Y., Pashkin, Yu. A., Pekola, J. P., Tsai, J. S.   +8 more
core   +2 more sources

Design of Visual Detection Algorithm for Loose Screw Faults in Internal Structure of Energy Storage Lithium-Ion Battery Packs

International Transactions on Electrical Energy Systems
In recent years, with the rapid development of renewable energy in China, the installed capacity of new energy storage systems—particularly lithium-ion batteries—has grown significantly.
Li Jin, Ertao Lei, Junkun Zhang, Kai Ma, Quanhui Li, Xiaoxue Yan, Qifu Lu   +6 more
doaj   +1 more source

Multi-level adaptive coordinated AC fault ride-through control strategy for hybrid cascaded UHVDC transmission system

电力工程技术
Hybrid cascaded ultra high voltage direct current (UHVDC) integrates the advantages of line commutated converters (LCC) and voltage source converters (VSC).
LYU Yanbei, ZHAO Wenqiang, SHI Qiaoming, YAO Qixin, SUI Shunke, CHANG Haotian   +5 more
doaj   +1 more source

Metabolic investigation in Gluconacetobacter xylinus and its bacterial cellulose production under a direct current electric field

Frontiers in Microbiology, 2016
The effects of a direct current (DC) electric field on the growth and metabolism of Gluconacetobacter xylinus were investigated in static culture. When a DC electric field at 10 mA was applied using platinum electrodes to the culture broth, bacterial ...
Miao eLiu, Cheng eZhong, Cheng eZhong, Yu Ming eZhang, Ze Ming eXu, Chang Sheng eQiao, Shi Ru eJia   +6 more
doaj   +1 more source