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Dielectrophoresis (henceforth called as DEP) is an electrokinetics-based phenomenon, that involves the motion of a particle due to interaction between its dipole moment and a nonuniform electric field around it. This technique is very effective in particle manipulation and separation. Here we consider the control problem involved in moving a particle in the DEP system, from one specified location...
This paper describes the partial discharge (PD) performances of gas mixtures with small fluorocarbons because their global warming potential (GWP) is smaller than that of SF6 gas, which was regulated as one of six restricted gases. It is difficult to apply pure fluorocarbon gases as insulating medium directly in gas insulated switchgear (GIS) and gas circuit breakers (GCB), because their liquefying...
This paper reports the influence of D.C. electric field on plant growth. We used the white radish sprout as the sample. The seeds of white radish sprout were grown under two circumstances; one is under electric fields, and the other is without electric fields. We have confirmed the following things: 1. The application of D.C. electric field improves the germination rate. 2. The D.C. electric field...
Electrocoalescence of water drops in a stagnant water-in-oil emulsion has been studied in a newly developed test cell. An homogeneous electric field was applied across the emulsion volume. It was used to observe drop behaviour in a multi-drop system. The emulsion was made of napthenic oil containing chemically stabilized water drops with size in the range of 5-100 ??m. Insulated electrodes were used...
Nano-vibration characteristics of a wirelessly driven piezoelectric plate operating in the thickness mode have been analyzed in this work. A mechanical resonance vibration is excited in the piezoelectric plate wirelessly driven by ac electric field produced from focused electric field structure. Theoretically it has been found that the vibration displacement depends on the electric field, operating...
It is reported that bacteria suspended in solution were inactivated by the pulsed electric field (PEF) process using coaxial treatment chamber and tube-plate treatment chamber. The bacteria inactivation effects in slightly non-uniform electric field and highly non-uniform electric field are studied in this paper. The samples, treated in the two treatment chambers, are subjected to the same flow rate...
Under the step voltage, the non-linear conductivity dielectrics have the function of grading the electric field. But such materials have been applied extensively under AC electric field, and insulating materials damaged mostly under impulse voltage. The research on the AC response characteristic presents the foundations for the development and application of non-linear insulation dielectrics. In this...
The effects of pulsed electric fields (PEFs) applied on the proanthocyanidins in young red wine was investigated using two co-field treatment chambers connected in series for fluid flow and in parallel for electrical flow. Reversed phase-high performance liquid chromatography (RP-HPLC) coupled with UV-visible detector was used to analyze the concentration of proanthocyanidins. The high voltage pulse...
A novel deep trench SOI LIGBT with enhanced safe operating area has been proposed. Deep trench gate electrode, reaching buried oxide layer, has been directly introduced for achieving low on-resistance. Heavily doped p+ region at the emitter side, which sandwiches between the n-drift region and n+ emitter region, is provided as holes bypassing path for ensuring enhanced forward biased safe operating...
In order to distinguish minor differences of particulate morphologies and dielectric properties, a new method of particulate separation by different dielectrophoretic holding force is developed in this paper. The ability for particulate captive involving electric field distribution is studied, and two kinds of negative dielectrophoretic traps are designed correspondingly. It's found that the traps...
In the past few years, new applications of terahertz wave have given rise to the development of intense terahertz wave source and modulation of terahertz wave. However, rigorous experimental conditions or few theoretical explanations were in these works. In this paper, a method to enhance and control the THz pulse generation in air plasma by external electric field is proposed. Two theoretical models,...
The benefits of enhanced condition monitoring in the asset management of the electricity transmission infrastructure are increasingly being exploited by the grid operators. Adding more sensors helps to track the plant health more accurately. However, the installation or operating costs of any additional sensors could outweigh the benefits they bring due to the requirement for new cabling or battery...
Cell electroporation using fields radiated or broadcast from an antenna is very attractive for both clinical and research applications. Experiments were performed to establish the basics of coupling a radiated field capacitively to a sample of cells in order to determine if electroporation can occur. Experiments have been performed using sub-nanosecond rise time pulses. Cells immobilized in agarose...
Pulsed electric field to treat seeds is an alternate method to the chemical treatment to control the weeds in the field. In this study yellow nutsedge seeds were subjected to series of repetitive pulsed electric field and the germination rate of the seeds after the treatment with respect to the non-treated seeds were studied. The seeds used in the experiment were air dried before they were exposed...
The above-mentioned chart of generator for GDV is the example of practical application of Tesla transformer. In comparison to similar devices on other element base, this variant of realization differs by extreme simplicity (and by good possibility of standardization) and economy of energy consumption (no more than 30 W).
This paper examines a time optimal control problem for a dielectrophoretic system. The system consists of a neutrally buoyant and neutrally charged particle in a chamber filled with a fluid flowing with low Reynolds number. At the bottom of this chamber is a series of parallel electrodes with a controlled voltage. The voltage on the electrodes creates a time-varying nonuniform electric field inducing...
The dissipation current waveform observation method is considered one of possible way as a diagnostic method for the un-bridged water tree on the high-voltage class power cable. In this paper, in order to clarify the time variations with the un-bridged water tree growth, by using the special chamber and setup, the dissipation current waveforms monitoring under the high voltage application test of...
The problem of charge injection/extraction at a metal- dielectric contact is treated theoretically by analogy with that for a metal-semiconductor contact. However, because in a dielectric material there is a large number of surface traps and bulk traps, the electrical conduction through a dielectric material is bulk limited and electrode limited and it is difficult to discriminate between the electrode...
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