12.2 Electric field concepts The force exerted on a unit of positive charge is termed the electric field. For effective electroporation, it is essential to know the electric field intensity (magnitude) and its distribution in cells and/or tissues. Electric field intensity in V/m is more commonly...
The results show that, both positive and negative DC electric fields enhance the combustion rates. Firstly, the mean flame propagation speed increases in the electric field direction and decreases in a direction perpendicular to the electric field with the increase of applied voltages. This effect ...
[translate] aSome scalars are always positive, whereas others such as electric charge (电荷) can be positive or negative. 有些标量总是正面的,而其他例如电荷 (电荷) 可以是正面或消极的。[translate]
Figure 4 shows that the normal E-fieldEnmust exist with an accompanying surface charge. The surface charge is positive if the E-field points away from the surface and negative if the E-field points towards the surface. The surface charge is measured in Coulombs/meter^2 [C/m^2]. The E-...
Electric-Field Induced Phase Change in Cholesteric Liquid Crystals Optically-negative cholesteric liquid-crystal films can be transformed to an optically-positive state by applying high d-c electric fields. A phase transformation occurs in which the helicoidal cholesteric structure is converted to eithe....
For M1, the strongest perpendicular fields (positive and negative) are produced by a coil orientation of 45 degrees relative to the medial-sagittal plane. A 90-degree coil rotation compared to the optimal orientation, which aligns the figure-of-eight midline with the central sulcus, produces a ...
On the inception of streamers from sprite halo events produced by lightning discharges with positive and negative polarity [1] In the sprite halo events produced by cloud-to-ground lightning discharges, the spatial offsets, long delays, and polarity asymmetry related to the inc... J Qin,S Cele...
Learn the definition of Electric field intensity and browse a collection of 55 enlightening community discussions around the topic.
The influence of the gradient field on mobile dipoles on surfaces has been previously reported44. In case of the positive (negative) tip bias and dipoles μ pointing perpendicularly to the surface, the field represents a potential well (hill) with depth (height) μE for each dipole. If the...
The electric field gradient is simply the change in electric field with direction due to the local distribution of nuclear and electronic charges at a particular point in space in which the nucleus in question is located. From: Encyclopedia of Physical Science and Technology (Third Edition), 2003...