نتایج جستجو برای: electric charge

تعداد نتایج: 272923  

2004
Albert E. Seaver

The charge transport equation is affected by thermal and concentration gradients as well as any applied electric field. In the charge transport equation the electrical conductivity, the electrical diffusivity and the electrical thermophoresis coefficient are all dependent on the electrical mobility which in turn is dependent on the collision time. When a time varying electric field is applied t...

2016
P. M. Bellan

Ions and neutrals in the weakly ionized plasma of an accretion disk are tightly bound because of the high ion-neutral collision frequency. A cluster of a statistically large number of ions and neutrals behaves as a fluid element having the charge of the ions and the mass of the neutrals. This fluid element is effectively a metaparticle having such an extremely small charge to mass ratio that it...

Journal: :Cell motility and the cytoskeleton 2007
Erik I Finkelstein Pen-hsiu Grace Chao Clark T Hung Jeannette Chloë Bulinski

Galvanotaxis, that is, migration induced by DC electric fields, is thought to play a significant role in development and wound healing, however, the mechanisms by which extrinsic electric fields orchestrate intrinsic motility responses are unknown. Using mammalian cell lines (3T3, HeLa, and CHO cells), we tested one prevailing hypothesis, namely, that electric fields polarize charged cell surfa...

2016
P. M. Bellan

Ions and neutrals in the weakly ionized plasma of an accretion disc are tightly bound because of the high ion–neutral collision frequency. A cluster of a statistically large number of ions and neutrals behaves as a fluid element having the charge of the ions and the mass of the neutrals. This fluid element is effectively a metaparticle having such an extremely small charge-to-mass ratio that it...

Journal: :Nature communications 2014
Takahiro Ishikawa Yuto Sagae Yota Naitoh Yohei Kawakami Hirotake Itoh Kaoru Yamamoto Kyuya Yakushi Hideo Kishida Takahiko Sasaki Sumio Ishihara Yasuhiro Tanaka Kenji Yonemitsu Shinichiro Iwai

Dynamical localization, that is, reduction of the intersite electronic transfer integral t by an alternating electric field, E(ω), is a promising strategy for controlling strongly correlated systems with a competing energy balance between t and the Coulomb repulsion energy. Here we describe a charge localization induced by the 9.3 MV cm(-1) instantaneous electric field of a 1.5 cycle (7 fs) inf...

2017
Ian Bickerton Neil A. Fox

Experiments have been conducted on a dual electric grid thermionic device to investigate an alternative method of space charge mitigation in a thermionic energy convertor (TEC). Two electric grids, the attractor and deflector grids, provide opposing electric fields to overcome space charge while minimizing power losses to the attractor grid. Electron beams are formed in the electrode gap provid...

Journal: :Entropy 2017
Emel Soylu Tuncay Soylu Raif Bayir

Li-Ion batteries are widely preferred in electric vehicles. The charge status of batteries is a critical evaluation issue, and many researchers are studying in this area. State of charge gives information about how much longer the battery can be used and when the charging process will be cut off. Incorrect predictions may cause overcharging or over-discharging of the battery. In this study, a l...

2011
James L. Pinfold

I first quickly summarize the history of the Magnetic Monopole leading to the quantum theory of magnetic charge that started with a 1931 paper by Paul Dirac who showed that the existence of magnetic monopoles was consistent with Maxwell's equations only if electric charges are quantized. Next I will briefly review the status of monopole searches. Last, but not least I discuss in more detail the...

2015
Zoltán Mics Klaas-Jan Tielrooij Khaled Parvez Søren A Jensen Ivan Ivanov Xinliang Feng Klaus Müllen Mischa Bonn Dmitry Turchinovich

The outstanding charge transport properties of graphene enable numerous electronic applications of this remarkable material, many of which are expected to operate at ultrahigh speeds. In the regime of ultrafast, sub-picosecond electric fields, however, the very high conduction properties of graphene are not necessarily preserved, with the physical picture explaining this behaviour remaining unc...

2005
M. Swartz V. Chiochia D. Kotlinski

We show that doubly peaked electric fields are necessary to describe grazing-angle charge collection measurements of irradiated silicon pixel sensors. A model of irradiated silicon based upon two defect levels with opposite charge states and the trapping of charge carriers can be tuned to produce a good description of the measured charge collection profiles in the fluence range from 0.5×10 neq/...

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