نتایج جستجو برای: electric structure

تعداد نتایج: 1690027  

Journal: :The Journal of Biophysical and Biochemical Cytology 1956
John H. Luft

Electric organs or tissues have been described in seven families of fish (Dahlgren, 1), but all of them have several features in common. The tissues occur as a series of more or less flattened plates or electroplaques, each of which consists of a nucleated cytoplasmic syncytial plate having a relatively large surface area. The plates are supplied with nerve endings on one surface only. On one o...

2012
N. D. Drummond

We report calculations of the electronic structure of silicene and the stability of its weakly buckled honeycomb lattice in an external electric field oriented perpendicular to the monolayer of Si atoms. The electric field produces a tunable band gap in the Dirac-type electronic spectrum, the gap being suppressed by a factor of about eight by the high polarizability of the system. At low electr...

Journal: :Physical review letters 2006
K Taniguchi N Abe T Takenobu Y Iwasa T Arima

The relationship between magnetic order and ferroelectric properties has been investigated for MnWO4 with a long-wavelength magnetic structure. Spontaneous electric polarization is observed in an elliptical spiral spin phase. The magnetic-field dependence of electric polarization indicates that the noncollinear spin configuration plays a key role for the appearance of the ferroelectric phase. A...

خدیوی بروجنی, محمد کاظم, میرابوطالبی, صدیقه, هاشمی حسین آبادی, منصوره,

In this paper, a theoretical study of electromagnetic wave passing through inhomogeneous over-dense plasma was performed. It was supposed that the plasma layer is immersed in vacuum and the plasma density has aparabolic profileform. In this way, the electric permittivity profile decreases gradually, acquires negative values, and then again becomes positive on the other side of the slab. It has ...

2003
R. E. Ergun L. Andersson C. W. Carlson D. L. Newman M. V. Goldman

Direct observations of magnetic-field-aligned (parallel) electric fields in the downward current region of the aurora provide decisive evidence of naturally occurring double layers. We report measurements of parallel electric fields, electron fluxes and ion fluxes related to double layers that are responsible for particle acceleration. The observations suggest that parallel electric fields orga...

2003
Ernest Mendrela

An operation of any electromechanical device, in that number electric machines, it is electric motors and generators, can be seen as: a) An impact of magnetic field on a piece of ferromagnetic material, b) An interaction of two magnetic fields: magnetic field of primary part and magnetic field of secondary part; the secondary magnetic field can be generated: either by a current flowing in a win...

احمدی , ندا , خدیوی بروجنی, محمد کاظم , رجایی, لیلا , میرابوطالبی, صدیقه ,

An investigation isundertaken to study the transmission of the electromagnetic waves through inhomogeneous over-dense plasma. The transmission is due to the excitation of the surface modes of plasma or plasmons. The construction of the plasma is in such a way that the charge density of the plasma linearly increases and passes through its critical value and then linearly decreases. The dissipati...

2014
Qiwei Xu Shumei Cui Liwei Song Qianfan Zhang

Electric variable transmission is a new electromechanical energy conversion device structure, which is especially suitable as the driving force distribution device for hybrid electric vehicles. This paper focuses on the power management strategy of hybrid electric vehicles based on an electric variable transmission, and a kind of hierarchical control ideology is proposed. The control strategy i...

Journal: :Physical chemistry chemical physics : PCCP 2016
Winarto Daisuke Takaiwa Eiji Yamamoto Kenji Yasuoka

Bioethanol has been used as an alternative energy source for transportation vehicles to reduce the use of fossil fuels. The separation of water-ethanol solutions from fermentation processes is still an important issue in the production of anhydrous ethanol. Using molecular dynamics simulations, we investigate the effect of axial electric fields on the separation of water-ethanol solutions with ...

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In this research, hydrodynamic behavior of a leaky dielectric droplet under an electric field is simulated. The level set method is used for interface tracking and the ghost fluid method is used for modeling discontinuous quantities at interface. Using Taylor’s leaky dielectric model, electric field and electric force at the interface is calculated. Simulation results show the droplet deformati...

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