Current field induced

Nie, W., Chen, Y., Smith, G., Xia, Y., Hewitt, C., CarroU, D., 2014. Nano graphite platelets enhanced blue emission in alternating current field Induced polymer based electroluminescence devices using Poly (9,9-dioctylfluorenyl-2,7-diyl) as the emitter. Org. Electron. 15, 99-104. 

Consider the schematic buried pipeline in soil shown in Figure 8.9 containing a current drain point at a hohday. The pipeline is buried in the soil at a remote distance from an sacrificial anode. This setup creates an impressed-current field induced by the anode in the soil of constant electrical resistivity. As Ashworth pointed out [2], this is just an approximation technique used for deriving an expression for an infinite pipehne. 

Assuming that the current in the gas is carried mostly by electrons, the induced electric field uB causes transverse electron motion (electron drift), which, being itself orthogonal to the magnetic field, induces an axial electric field, known as the Hall field, and an axial body force, F, given by... 

These balanced enclosure currents also induce electric fields into nearby structures, RCC beams and columns in the same way as the main conductors, and hence nullify most of the space magnetic fields. These space fields (fields outside the enclosure) are otherwise responsible for causing eddy current and hysteresis losses in the metallic (magnetic) structures, RCC beams and columns in the vicinity. The electrical bonding of enclosures thus... 

Any discrepancy between the measured and the calculated values for the current in the model for field-induced tunneling can be discussed by (i) a back flow... 

When the electric field-induced tunneling currents are analyzed in a log WE1) versus ME plot, a straight line should be obtained. The height of the potential barrier can be derived from the slope of this straight line using Eq. (9.12). 

Dielectric loss The dielectric loss factor represents energy that is lost to the insulator as a result of its being subjected to alternating current (AC) fields. The effect is caused by the rotation of dipoles in the plastic structure and by the displacement effects in the plastic chain caused by the electrical fields. The frictional effects cause energy absorption and the effect is analogous to the mechanical hysteresis effects except that the motion of the material is field induced instead of mechanically induced. 

For a single electron, the velocity operator in eq.(7) corresponds to the current operator j(Ro,B) = —ev, and hence to the following operator representing the magnetic field induced at a field point R... 

Substances having only paired electrons are diamagnetic. When they are introduced into an external magnetic field, a force acts on the electrons, i.e. an electric current is induced. The magnetic field of this current is opposed to the external field (Lenz s rule). As a result, the substance experiences a repulsion by the external magnetic field the repulsive force is rather weak, but ever present. 

The magnetic field induced by the current cancels the magnetic field induced in the superconductor by the magnet. This is the origin of the perfect diamagnetism of Type I superconductors. 

Scientists are interested in superconductors because they have a number of properties that arise from their lack of resistance. For example, once a current is induced in a circuit made with a superconducting material, the current continues to flow through the circuit indefinitely, without ever diminishing. Also, superconductors have the ability to completely repel magnetic field lines. This means that a magnet placed over a superconductor hovers in mid-air, as shown in Figure 4.25. 

Studies incorporating NMR detection in electrophoresis began in 1972 when Packer and coworkers examined MeaN" " ions under the influence of an electric current [89]. They determined that electrical current density in the sample and the radial motion of ions under the influence of the magnetic field induced undesirable magnetic field gradients. This work was followed up by Holz and Muller who suggested that the undesirable field gradients and their effects can be minimized if the electric... 

Henry White was born in Chapel Hill. North Carolina in 1956. He received a B.S. in Chemistry from the University of North Carolina in 1978 and a Ph.D. in Chemistry from the University of Texas at Austin in 1982. He held a postdoctoral appointment at the Massachusetts Institute of Technology from 1983 to 1984 and was on the faculty of the Department of Chemical Engineering and Materials Science at the University of Minnesota from 1984 to 1993. He is currently a Professor of Chemistry at the University of Utah. His research interests include magnetic-field-induced transport, oxide films and corrosion, iontophoretic transdermal drug delivery, and electrochemical phenomena at electrodes of nanometer dimensions. 

Electroremediation is a method for the in situ removal of heavy-metal and organic compounds from low-permeability soils by the application of direct-current electric fields. These fields induce the transport of water and contaminants to wells where they are pumped to the surface. Massachusetts Institute of Technology (MIT) developed the Electroremediation technology, which is commercially available through Corrpro Companies Incorporated. 

Lynntech, Inc. s (Lynntech s), electrokinetic remediation of contaminated soil technology is an in situ soil decontamination method that uses an electric current to transport soil contaminants. According to Lynntech, this technology uses both direct current (DC) and alternating current (AC) electrokinetic techniques (dielectrophoresis) to decontaminate soil containing heavy metals and organic contaminants. A non homogeneous electric field is applied between electrodes positioned in the soil. The field induces electrokinetic processes that cause the controlled, horizontal, and/or vertical removal of contaminants from soils of variable hydraulic permeabilities and moisture contents. 

Fig. 1.36. The topografiner. An instrument developed by Young, Ward, and Scire in the late 1960s, which is the closest ancestor of the STM. (a) The tip is driven by the x and y piezos, and the sample is mounted on the z piezo. By applying a high voltage between the tip and the sample, a field-emission current is induced. Using the field-emission current as the feedback signal, topography of the sample surface is obtained, (b) Close-up of the tip and the sample. The end of the tip has a small radius, typically a few hundred A. The typical tip-sample distance is a few thousand A. (After Young, 1971.)...

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