Results 41 to 50 of about 22,137 (279)

Low frequency elastic measurements on solid $^{4}$He in Vycor using a torsional oscillator [PDF]

, 2014
Torsional oscillator experiments involving solid $^{4}$He confined in the nanoscale pores of Vycor glass showed anomalous frequency changes at temperatures below 200 mK.
Balibar, S., Beamish, J. R., Fefferman, A. D., Haziot, A.   +3 more
core   +2 more sources

Faulty Feeder Identification and Fault Area Localization in Resonant Grounding System Based on Wavelet Packet and Bayesian Classifier

Journal of Modern Power Systems and Clean Energy, 2020
Accurate fault area localization is a challenging problem in resonant grounding systems (RGSs). Accordingly, this paper proposes a novel two-stage localization method for single-phase earth faults in RGSs.
Jingwen Chen, Enliang Chu, Yingchun Li, Baoji Yun, Hongshe Dang, Yali Yang   +5 more
doaj   +1 more source

Fault Line Selection Method Based on Transfer Learning Depthwise Separable Convolutional Neural Network

Journal of Electrical and Computer Engineering, 2021
With the continuous development of artificial intelligence technology, the value of massive power data has been widely considered. Aiming at the problem of single-phase-to-ground fault line selection in resonant grounding system, a fault line selection ...
Haixia Zhang, Wenao Cheng
doaj   +1 more source

Topolectrical circuits

, 2017
Invented by Alessandro Volta and F\'elix Savary in the early 19th century, circuits consisting of resistor, inductor and capacitor (RLC) components are omnipresent in modern technology. The behavior of an RLC circuit is governed by its circuit Laplacian,
Bayer, Florian, Berger, Christian, Brehm, Johannes, Imhof, Stefan, Kiessling, Tobias, Lee, Ching Hua, Molenkamp, Laurens W., Thomale, Ronny   +7 more
core   +1 more source

On the application of radio frequency voltages to ion traps via helical resonators

, 2011
Ions confined using a Paul trap require a stable, high voltage and low noise radio frequency (RF) potential. We present a guide for the design and construction of a helical coil resonator for a desired frequency that maximises the quality factor for a ...
A.I. Zverev, D. Hucul, D. Kielpinski, D. Porras, H. Häffner, H. Schmitz, J. D. Siverns, J.C. Collingwood, J.I. Cirac, J.J. Bollinger, L. R. Simkins, M. Yu, M.D. Hughes, M.J. Madsen, P.A. Ivanov, P.K. Ghosh, P.T. H Fisk, Q.A. Turchette, R.J. Clark, S. Weidt, W. K. Hensinger, W. Meyer, W. Paul, W.W. Macalpine   +23 more
core   +1 more source

YBCO microwave resonators for strong collective coupling with spin ensembles [PDF]

, 2015
Coplanar microwave resonators made of 330 nm-thick superconducting YBCO have been realized and characterized in a wide temperature ($T$, 2-100 K) and magnetic field ($B$, 0-7 T) range.
A. Cassinese, A. Ghirri, C. Bonizzoni, D. Gerace, Ghirri A., Hein M., M. Affronte, Prokhorov A. M., S. Sanna   +8 more
core   +2 more sources

Fault line selection method for earth faults occurred in different phases of two feeders connected to the same bus based on the ratio of zero-sequence admittance amplitude

电力工程技术
When the earth faults occur in different phases of two feeders connected to the same bus in the resonant grounding system, the conventional fault line selection devices are inaccurate.
HAN Jie, LIU Zhiyong, ZHOU Qilin, TONG Rui, LING Yuchang, LIANG Guokai   +5 more
doaj   +1 more source

Deterministic delivery of externally cold and precisely positioned single molecular ions

, 2011
We present the preparation and deterministic delivery of a selectable number of externally cold molecular ions. A laser cooled ensemble of Mg^+ ions subsequently confined in several linear Paul traps inter-connected via a quadrupole guide serves as a ...
A. Friedenauer, A. Ostendorf, B. Roth, C. Wieman, D. Gerlich, D. Madsen, D.J. Larson, D.J. Wineland, F. Diedrich, G. Leschhorn, G. Webster, H.L. Bethlem, H.L. Bethlem, H.N. Chapman, J.B. Fenn, K. Mølhave, L. Young, M. Drewsen, M. Seibert, M.D. Barrett, N. Kjaergaard, P.F. Staanum, P.W. Smith, R. Henderson, R. Neutze, S. Kahra, S. Kahra, S. Schiller, S. Willitsch, S.A. Rangwala, T. Junglen, T. Schaetz, T. Schaetz, T. Schneider, U. Schramm, U. Schramm, W. Paul   +36 more
core   +1 more source

Conceptual study of an ICRH traveling-wave antenna system for low-coupling conditions as expected in DEMO [PDF]

, 2016
For the central heating of a fusion reactor ion cyclotron radio frequency heating (ICRH) is the first choice method as it is able to couple RF power to the ions without density limit.
Messiaen, A, Ragona, Riccardo
core   +2 more sources

Optimizing photoactivation of PA‐mCherry for optical pooled CRISPR screens

FEBS Open Bio, EarlyView.
Photoactivatable PA‐mCherry finds widespread use to optically tag individual cells. However, confocal 405 nm UV laser‐scanning (normal scan) is much less efficient than widefield UV illumination, limiting the use of PA‐mCherry on confocal instruments. We remedy this limitation by reporting that rapid and repeated confocal scanning with a low‐intensity,
Sravasti Mukherjee, Giulia Zanetti, Bram van den Broek, Kees Jalink   +3 more
wiley   +1 more source