Добірка наукової літератури з теми "Stabilizing electric fields"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Stabilizing electric fields".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Статті в журналах з теми "Stabilizing electric fields"
1
Fernández, M. Laura, Marcelo Risk, Ramon Reigada, and P. Thomas Vernier. "Size-controlled nanopores in lipid membranes with stabilizing electric fields." Biochemical and Biophysical Research Communications 423, no. 2 (June 2012): 325–30. http://dx.doi.org/10.1016/j.bbrc.2012.05.122.
Повний текст джерела
2
El-Sayed, M. F., N. T. Eldabe, M. H. Haroun, and D. M. Mostafa. "Nonlinear Electrohydrodynamic Stability of Two Superposed Walters B′ Viscoelastic Fluids in Relative Motion Through Porous Medium." Journal of Mechanics 29, no. 4 (May 23, 2013): 569–82. http://dx.doi.org/10.1017/jmech.2013.36.
Повний текст джерелаАнотація:
ABSTRACTA nonlinear stability of two superposed semi-infinite Walters B′ viscoelastic dielectric fluids streaming through porous media in the presence of vertical electric fields in absence of surface charges at their interface is investigated in three dimensions. The method of multiple scales is used to obtain a Ginzburg-Landau equation with complex coefficients describing the behavior of the system. The stability of the system is discussed both analytically and numerically in linear and nonlinear cases, and the corresponding stability conditions are obtained. It is found, in the linear case, that the surface tension and medium permeability have stabilizing effects, and the fluid velocities, electric fields and kinematic viscoelastici-ties have destabilizing effects, while the porosity of porous medium and kinematic viscosities have dual role on the stability. In the nonlinear case, it is found that the fluid velocities, kinematic viscosities, kinematic viscoelasticities, surface tension and porosity of porous medium have stabilizing effects; while the electric fields and medium permeability have destabilizing effects.
3
Papageorgiou, Demetrios T. "Film Flows in the Presence of Electric Fields." Annual Review of Fluid Mechanics 51, no. 1 (January 5, 2019): 155–87. http://dx.doi.org/10.1146/annurev-fluid-122316-044531.
Повний текст джерелаАнотація:
The presence of electric fields in immiscible multifluid flows induces Maxwell stresses at sharp interfaces that can produce electrohydrodynamic phenomena of practical importance. Electric fields can be stabilizing or destabilizing depending on their strength and orientation. In microfluidics, fields can be used to drive systems out of equilibrium to produce hierarchical patterning, mixing, and phase separation. We describe nonlinear theories of electrohydrodynamic instabilities in immiscible multilayer flows in several geometries, including flows over or inside planar or topographically structured substrates and channels and flows in cylinders and cylindrical annuli. Matched asymptotic techniques are developed for two- and three-dimensional flows, and reduced-dimension nonlinear models are derived and studied. When all regions are slender, electrostatic extensions to lubrication or shallow-wave theories are derived. In the presence of nonslender layers, nonlocal terms emerge naturally to modify the evolution equations. Analysis and computations provide a plethora of dynamics, including nonlinear traveling waves, spatiotemporal chaos, and singularity formation. Direct numerical simulations are used to evaluate the models and go beyond their range of validity to quantify phenomena such as electric field–induced directed patterning, suppression of Rayleigh–Taylor instabilities, and electrostatically induced pumping in microchannels. Comparisons of theory and simulations with available experiments are included throughout.
4
Radwan, Ahmed E. "Electrogravitational instability of an annular fluid jet coaxial with a very dense fluid cylinder under radial varying fields." Journal of Plasma Physics 44, no. 3 (December 1990): 455–65. http://dx.doi.org/10.1017/s0022377800015300.
Повний текст джерелаАнотація:
The electrodynamic instability of a self-gravitating dielectric annular fluid jet possessing a very dense fluid (of negligible inertia) cylinder mantle surrounded by another dielectric self-gravitating medium pervaded by a radial varying electric field is investigated. A general eigenvalue relation valid for all possible symmetric m = 0 and asymmetric m ≠ 0 perturbation modes is derived and discussed. The electrodynamic force has a strong destabilizing influence not only to m = 0 but also to m ≠ 0 disturbance modes. The self-gravitational force is stabilizing to all pure m ≠ 0 modes, while to m = 0 it is stabilizing or destabilizing according to conditions. The destabilizing effects of the internal and exterior varying electric fields shrink the gravitationally stable states and simultaneously increase the unstable ones. The electrogravitodynamic instability character of the model can be minimized if the electrodynamic force effect is extremely small in comparison with that of the self-gravitational force, but the instability will never be suppressed.
5
El-Sayed, Mohamed Fahmy. "Electrohydrodynamic Interfacial Stability Conditions in the Presence of Heat and Mass Transfer and Oblique Electric Fields." Zeitschrift für Naturforschung A 54, no. 8-9 (September 1, 1999): 470–76. http://dx.doi.org/10.1515/zna-1999-8-904.
Повний текст джерелаАнотація:
A novel mathematical formulation to deal with interfacial stability problems of the Kelvin-Helmholtz type with heat and mass transfer in the presence of oblique electric fields is presented. The perturbed system is composed of two homogeneous, inviscid, incompressible, dielectric, and streaming fluids sep-arated by a horizontal interface, and bounded by two rigid planes. The effect of a phase transition on the instability is considered, and the linear dispersion relations are obtained and discussed. It is found that the electric field has a major effect and can be chosen to stabilize or destabilize the flow. For Ray-leigh-Taylor instability problems of a liquid-vapor system it is found that the effect of mass and heat transfer enhances the stability of the system when the vapor is hotter than the liquid, although the clas-sical stability criterion is still valid. For Kelvin-Helmholtz instability problems, however, the classical stability criterion is found to be substantially modified due to the effects of the electric field, mass and heat transfer. A new stability condition relating the magnitude and orientation of the electric field and the dielectric constants is obtained. Oblique electric fields are found to have stabilizing effects which are reduced by the normal components of the electric fields. The effects of orientation of the electric fields and fluid depths on the stability configuration are also discussed.
6
HOFFMAN, BRENDAN D., and ERIC S. G. SHAQFEH. "The effect of Brownian motion on the stability of sedimenting suspensions of polarizable rods in an electric field." Journal of Fluid Mechanics 624 (April 10, 2009): 361–88. http://dx.doi.org/10.1017/s0022112008005405.
Повний текст джерелаАнотація:
We examine the collective dynamics of polarizable, Brownian, sedimenting rods of high aspect ratio. Previous work of Koch and Shaqfeh (J. Fluids Mech., vol. 209, 1989 pp. 521–542) has shown that in the absence of Brownian motion, sedimenting suspensions of rods are unstable to concentration fluctuations and form dense streamers via interparticle hydrodynamic interactions. Recently, Saintillan, Shaqfeh & Darve (Phys. Fluids, vol. 18 (121701), 2006b p. 1) demonstrated that electric fields can act to stabilize these non-Brownian suspensions of polarizable rods through induced-charge electrokinetic rotation, which forces particle alignment. In this paper, we employ a mean-field linear stability analysis as well as Brownian dynamics simulations to study the effect of thermal motion on the onset of instability. We find that in the absence of electric fields, Brownian motion consistently suppresses instability formation through randomization of particle orientation. However, when electric fields are applied, thermal motion can act to induce instability by counteracting the stabilizing effect of induced-charge orientation.
7
González, H., F. M. J. Mccluskey, A. Castellanos, and A. Barrero. "Stabilization of dielectric liquid bridges by electric fields in the absence of gravity." Journal of Fluid Mechanics 206 (September 1989): 545–61. http://dx.doi.org/10.1017/s0022112089002405.
Повний текст джерелаАнотація:
The stability of liquid bridges in zero gravity conditions under the influence of an a.c. electric field tangential to the interface is examined in this paper. For the theoretical study, a static analysis was carried out to find the bifurcation surfaces as a function of the three relevant non-dimensional parameters: Λ, the slenderness or ratio of height to diameter of the cylindrical bridge; β0, the ratio of dielectric constants of the two fluids used and Ξ, a non-dimensional quantity proportional to the applied voltage. Stable and unstable regions of Λ−βo−Ξ space were distinguished. Results indicate a strong stabilizing effect for higher values of β0. The experimental study, using silicone and ricinus oil to approximate zero gravity conditions fully confirmed quantitatively the theoretical results.
8
Rochlin, M. W., and H. B. Peng. "Localization of intracellular proteins at acetylcholine receptor clusters induced by electric fields in Xenopus muscle cells." Journal of Cell Science 94, no. 1 (September 1, 1989): 73–83. http://dx.doi.org/10.1242/jcs.94.1.73.
Повний текст джерелаАнотація:
Electric fields cause acetylcholine receptor (AChR) patches to form on the cathodal sides of cultured muscle cells. These patches are stable for several hours following cessation of an electric field treatment, indicating that the receptors are anchored to the cluster sites. Furthermore, at the ultrastructural level, AChR patches induced by electric fields are marked by an accumulation of extracellular matrix material and a sarcolemmal density. Thus, these AChR patches are similar to those induced by other stimuli, including nerve, polycation-coated beads, and the tissue culture substratum. Proteins that may be involved in anchoring AChRs have been colocalized with AChR patches induced by the latter three stimuli, but not at AChR patches induced by electric fields. In this study, we demonstrate that three putative anchoring proteins, 43K (K = 10(3) Mr) protein, 58K protein and talin, are associated with field-induced AChR patches. We also show that these proteins persist at field-induced AChR patches following removal of the field, indicating that they are stabilized at the AChR patch. Our data are consistent with the possibility that these proteins contribute to the stabilization of AChRs at patches induced by the electric field. Since 43K, 58K and talin are intracellular proteins, and therefore could not undergo field-induced lateral electrophoresis, our observations support the notion that the electric field triggers the formation of an AChR-stabilizing specialization.
9
Ponce-Torres, A., N. Rebollo-Muñoz, M. A. Herrada, A. M. Gañán-Calvo, and J. M. Montanero. "The steady cone-jet mode of electrospraying close to the minimum volume stability limit." Journal of Fluid Mechanics 857 (October 22, 2018): 142–72. http://dx.doi.org/10.1017/jfm.2018.737.
Повний текст джерелаАнотація:
We study both numerically and experimentally the steady cone-jet mode of electrospraying close to the stability limit of minimum flow rate. The leaky dielectric model is solved for arbitrary values of the relative permittivity and the electrohydrodynamic Reynolds number. The linear stability analysis of the base flows is conducted by calculating their global eigenmodes. The minimum flow rate is determined as that for which the growth factor of the dominant mode becomes positive. We find a good agreement between this theoretical prediction and experimental values. The analysis of the spatial structure of the dominant perturbation may suggest that instability originates in the cone-jet transition region, which shows the local character of the cone-jet mode. The electric relaxation time is considerably smaller than the residence time of a fluid particle in the cone-jet transition region (defined as the region where the surface and bulk intensities are of the same order of magnitude) except for the high-polarity case, where these characteristic times are commensurate with each other. The superficial charge is not relaxed within the cone-jet transition region except for the high-viscosity case, because significant inner electric fields arise in the cone-jet transition region. However, those electric fields are not large enough to invalidate the scaling laws that do not take them into account. Viscosity and polarization forces compete against the driving electric shear stress in the cone-jet transition region for small Reynolds numbers and large relative permittivities, respectively. Capillary forces may also play a significant role in the minimum flow rate stability limit. The experiments show the noticeable stabilizing effect of the feeding capillary for diameters even two orders of magnitude larger than that of the jet. Stable jets with electrification levels higher than the Rayleigh limit are produced. During the jet break-up, two consecutive liquid blobs may coalesce and form a bigger emitted droplet, probably due to the jet acceleration. The size of droplets exceeds Rayleigh’s prediction owing to the stabilizing effect of both the axial electric field and viscosity.
10
Rudolph, P., and K. Kakimoto. "Crystal Growth from the Melt under External Force Fields." MRS Bulletin 34, no. 4 (April 2009): 251–58. http://dx.doi.org/10.1557/mrs2009.75.
Повний текст джерелаАнотація:
AbstractThe present and future demands of industrial bulk crystal growth from the melt are concentrated on improved crystal quality, increased yield, and reduced costs. To meet these challenges, the size of the melt volume must be markedly increased. As a result, violent convective perturbations appear within the melts due to turbulent heat and mass flows. They disturb the single crystal growth and give rise to compositional inhomogeneities. The application of external force fields is an effective method to dampen and control these flows. After introducing different stabilizing variants, such as constant and accelerated melt rotation, mechanical vibrations, and electric current, this article focuses on the use of magnetic fields. Nonsteady fields became very popular because, in this case, the needed strength of the magnetic induction is much lower than for steady fields. A new low-energy low-cost technology that combines heat and magnetic field generation in one module placed close to the melt crucible is introduced.
Дисертації з теми "Stabilizing electric fields"
1
Воробйов, Владислав Євгенійович. "Оптичні рідкокристалічні сенсори". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/35117.
Повний текст джерелаАнотація:
Дипломна робота присвячена питанням підвищення ефективності одного з основних виконавчих елементів електроніки. Ознайомлення з основними характеристиками сесорів. Аналіз шляхів оптимізації технічних параметрів датчиків рідкокристалічного градієнта тиску. Аналіз рідких кристальних сензорів акселерації, вібрацій і включення.
У роботі розглянуто башато типів сенсорів та віддано перевашу оптичному рідкокристалічному сесору в зв’язку з легкою уніфікаціею його конструкції та широким використанням в побуті. Використовуючи властивості рідкокристалічних матеріалів вдалося досягти надзвичано чутливих ті презиційних сенсорів.Thesis is devoted to improving the efficiency of one of the main executive elements of electronics. Introduction to the main characteristics of sessors. Analysis of ways to optimize the technical parameters of liquid crystal pressure gradient sensors. Analysis of liquid crystal sensors of acceleration, vibration and inclusion. The paper considers many types of sensors and prefers the optical liquid crystal sensor due to the easy unification of its construction and widespread use in the home. Using the properties of liquid crystal materials, it was possible to achieve extremely sensitive sensing sensors.
Частини книг з теми "Stabilizing electric fields"
1
Brandão, Jeovani, Marcos Vinicius Puydinger dos Santos, and Fanny Béron. "Stabilizing Zero-Field Skyrmions at Room-Temperature in Perpendicularly Magnetized Multilayers." In Magnetic Skyrmions. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97179.
Повний текст джерелаАнотація:
Magnetic skyrmions are twirling spin structures observed in bulk, thin films, and multilayers with several features for both fundamental physics understanding and spintronic applications, i.e., nanoscale size, efficient transport under electrical current, and topological protection against defects. However, most magnetic skyrmions have been observed under the assistance of an out-of-plane magnetic field, which may limit their use in magnetic memory technologies. In this chapter, we review and present two recent mechanisms to create zero-field skyrmions at room-temperature in ferromagnetic multilayers. First, by tuning the perpendicular magnetic anisotropy (PMA) and remnant magnetization (near magnetization saturation) in unpatterned symmetric multilayer systems, it was achieved a transition from worm-like domains to isolated skyrmions. Besides, we present how to find stable zero-field skyrmions in arrays of ferrimagnetic discs by tailoring their diameter. Both methods demonstrate a robust route to stabilize zero-field skyrmions at room temperature, thus providing an important contribution to possible applications of these textures in the next generation of skyrmionics devices.
2
Ramya, Emusani. "Green Synthesis of Metal Nanostructures and Its Nonlinear Optical Properties." In Nonlinear Optics [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99449.
Повний текст джерелаАнотація:
Simple green synthesis of metal nanoparticles (Ag NPs) was prepared by using Raphanussativus leaf extract. This extract acts as reduce and stabilizing agent. The formation of silver NPs was confirmed and characterized by XRD, UV–visible absorption spectrum, TEM, and FTIR. The luminescence enhancement and quenching of Eu3+and Sm3+ ions were observed in the presence of silver NPs. The luminescence enhancement is owing to arise in the electric-dipole transition with alteration of the field around Ln3+ ions. Nonlinear studies in femtosecond (fs) and picosecond (ps) time scales have been studied by using the Z-scan technique. Third-order nonlinear optical susceptibility of silver nanoparticles was obtained with Degenerate Four-Wave Mixing (DFWM) in the fs regime. The lifetimes of lanthanum complexes were increased by the concentration of silver NPs and decreased for further silver. The high enhanced luminescence and nonlinear studies of green synthesized silver nanoparticles can be used in optics and bio applications.
3
Gronlund, Ake. "Building an Infrastructure to Manage Electronic Services." In Managing Internet and Intranet Technologies in Organizations, 71–103. IGI Global, 2001. http://dx.doi.org/10.4018/978-1-878289-95-7.ch006.
Повний текст джерелаАнотація:
For an organization to be able to deliver electronic services efficiently and professionally requires a “service infrastructure” including organizational solutions for logistics and customer (citizen) interactions. This chapter reviews a study covering three years of efforts by nine cities in eight European countries in developing such solutions. Generally, Web projects were seen as technical projects; though in fact issues pertaining to users and organization were most important, they were largely neglected. We found 12 distinct “challenges,” situations where the setting changed and the process was found in a stage of improvisation until new stability was achieved. The challenges fall into four categories, concerning users (4 challenges), organization (6), economy (1) and technology (1). We found that the overall process was largely unstructured and improvised. Stabilizing factors were central government policies (national, European Union), the general technical development, market demands and a cadre of Web agents” fostered within the organizations over years of Web projects. There was typically a missing infrastructure link, a body competent of managing the whole process of bundling services from different service providers and publishing them in a coherent fashion, providing support to service providers during the process of inventing, refining and evaluating services, improving operations and conducting the necessary but typically ignored activities of analysis of service quality and policy making. Our conclusion is that there is a great lack of strategic leadership in the field of electronic services in local governments in Europe. This is a big problem considering the importance of that sector and the challenges it is facing.
Тези доповідей конференцій з теми "Stabilizing electric fields"
1
Li, Haiwang, Teck Neng Wong, and Nam-Trung Nguyen. "Electrohydrodynamic and Shear-Stress Interfacial Instability of Two Streaming Viscous Liquid Inside a Microchannel for Normal Electric Fields." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58089.
Повний текст джерелаАнотація:
The electrohydrodynamic and shear-stress instability of the interface between two viscous fluids with different electrical properties under constant flowrates in microchannel is analytically and experimentally investigated. In analytical model, the two-layer system is subjected to an electric field normal to the interface between the two fluids; the electric field, surface charge and fluid dynamic are coupled only at the interface. In the experiments, two immiscible fluids, aqueous NaHCO3 (high electrical mobility fluid) and Poly (dimethylsiloxane) (low electrical mobility fluid) are pushed into the PMMA microchannel using syringes and syringe pump. The normal electric field is added to the aqueous NaHCO3 using high voltage power supply; the perturbation electric field are added using a function generator and a power amplifier. The results showed that the electric fields can induce the instability of fluids in microchannel; the increasing of viscosity and flowrates has a stabilizing effect to the flow; but increasing of thickness has a destabilizing effect to the flow. The results also show that the analytical solution has a good agreement with the experimental results.
2
Hammer, T., G. Lins, D. W. Branston, F. Dinkelacker, A. Sakhrieh, and A. Leipertz. "Electro-Hydrodynamic Control of Premixed Turbulent Methane Flames at Pressures Above 1 ATM." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-69137.
Повний текст джерелаАнотація:
Electric field control of combustion offers the potential of stabilizing flames and reducing emissions with comparatively little effort. Previous investigations of the effects of electric fields on flames were restricted to atmospheric pressure and the question whether field effects persist at higher pressures remained open. In the present work effects of electric fields on flame behavior are established for pressures up to 10 bar without any indication that this should be an upper limit. Voltage-current measurements and optical emission spectroscopy gave clear evidence that at all experimental conditions under investigation electric field induced ionization and dissociation reactions were negligible with regard to the combustion process. Thus it is concluded that all observed effects are due to electro-hydrodynamic distortions of the gas flow caused by electrostatic forces acting on the ions generated in the reaction zones of the flames. The concentration of pollutants such as CO, NO and NO2 in the presence of an electric field depends on the ratio U/p of electrode voltage U and pressure p which implies that the electric field strength required to obtain a given effect increases linearly with pressure. In an electric field directed towards the burner CO emissions could be reduced by about 90%, irrespective of pressure. The decrease of CO was accompanied by an increase of NOx by about 20%. The electric power required for a CO reduction of 90% amounted to 0.1% of the thermal power. The improvement of the lean blow-off limit upon application of an electric field observed so far ranges from 1 to 3% and increases with pressure.
3
Kara, Dogacan, Nazli Donmezer, Talha Furkan Canan, Ozlem Sen, and Ekmel Ozbay. "Effects of Field Plate on the Maximum Temperature and Temperature Distribution for GaN HEMT Devices." In ASME 2016 Heat Transfer Summer Conference collocated with the ASME 2016 Fluids Engineering Division Summer Meeting and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ht2016-7367.
Повний текст джерелаАнотація:
Field plated GaN high electron mobility transistors (HEMTs) are widely preferred amongst other GaN HEMT devices because of their ability to regulate electric field at high power densities. When operated at high power densities, GaN HEMTs suffer significantly from the concentrated heating effects in a small region called hotspot located closer to the drain edge of the gate. Although; the stabilizing effect of field plate on the electrical field distribution in HEMTs is known by researchers, its effect on temperature distribution and the hotspot temperature is still not studied to a greater extend. For this purpose, finite element thermal modelling of devices with different sizes of field plates are performed using the joule heating distribution data obtained from 2D electrical simulations. Results obtained from such combined model show that the existence of a field plate changes the electrical field, therefore the heat generation distribution within device. Moreover; increasing the size of the field plate has an effect on the maximum temperature at the hotspot region. The results are used to analyze these effects and improve usage of field plates for high electron mobility transistors to obtain better temperature profiles.
4
Gupta, Prateek, and Supreet Singh Bahga. "Stability Analysis of Oscillating Electrolytes." In ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/icnmm2015-48075.
Повний текст джерелаАнотація:
We present an investigation of instabilities that occur in a class of electrolytes, called oscillating-electrolytes, which become unstable under the effect of electric field. We analyze the onset of instability by modeling growth of small perturbations in concentration field of a binary electrolyte. Our analysis is based on linearizing the nonlinear species transport equations, which include the effects of electromigration, diffusion, and acid - base equilibria on electrophoretic transport of ions. Our linear stability analysis shows that, the growth rate of low wavenumber concentration disturbances increases with increase in wavenumber. Whereas, the growth rate of high wavenumber disturbances decreases with increasing wavenumber due to stabilizing effect of molecular diffusion. Our analysis also yields scaling for growth rates and the wavenumber of most unstable mode with electric field. The growth rates and scaling predicted by our linearized model compare well with those predicted by fully nonlinear simulations. In addition, we show that the oscillatory behavior is exhibited only over a range of species concentrations. We also discuss the physical mechanism that causes concentration disturbances to grow in oscillating electrolytes. We show that oscillations result when the binary electrolyte consists of a multivalent species with unusually high electrophoretic mobility in higher ionization states. Presence of such species causes abnormal variations in electrical conductivity due to concentration disturbances, which in turn alter the electric field in a way that destabilizes the electrophoretic system.
5
Nazaripoor, Hadi, Charles R. Koch, and Subir Bhattacharjee. "Dynamics of Thin Liquid Bilayers Subjected to an External Electric Field." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37302.
Повний текст джерелаАнотація:
Spatiotemporal evolution of liquid-liquid interface leading to dewetting and pattern formation is investigated for thin liquid bilayeres subjected to the long range electrostatic force and the short range van der Waals forces. Based on the 2D weakly non-linear thin film equation three dimensional structure evolution is numerically simulated. A combined finite difference for the spatial dimensions and an adaptive time step ODE solver is used to solve the governing equation. For initially non-wetting surfaces, the stabilizing effects of viscosity and interfacial tension and the destabilizing effect of the Hamaker constant are investigated. Electrostatic interaction is calculated analytically for both perfect dielectric-perfect dielectric and ionic conductive-perfect dielectric bilayers. Ionic conductive-perfect dielectric bilayers based on the electric permittivity ratio of layers are found to be stabilized or deformed in response to the applied external electric field.
6
Adamcikova, E. Y., A. Y. Tsarev, A. R. Kostrov, and T. I. Vovk. "SYSTEM FOR SETTING PARAMETERS OF THE TECHNOLOGICAL PROCESS OF COMBINE HARVESTERS." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. DSTU-PRINT, 2020. http://dx.doi.org/10.23947/interagro.2020.1.332-335.
Повний текст джерелаАнотація:
The introduction of new precision farming technologies is carried out in order to ensure high reliability of combines, ease of operation and high efficiency. Each modern combine harvester must be equipped with an electronic system for effective control and management of the machine-an on-Board computer (BC), which would allow maintaining the uniformity of the grain mass flow and stabilizing the allocation of grain from the straw pile, with the agrophone changing in the field (yield, flatness, clogging, moisture content of grain and straw, etc.).
7
Brahmbhatt, Khushboo, Wujun Zhao, Zhaojie Deng, Leidong Mao, and Eric Freeman. "Magnetically Responsive Droplet Interface Bilayer Networks." In ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/smasis2015-9029.
Повний текст джерелаАнотація:
This work explores incorporating ferrofluids with droplet interface bilayer (DIB) membranes. Ferrofluids contain magnetic nanoparticles in solution with a stabilizing surfactant, providing a magnetically-responsive fluid. These fluids allow for remote mechanical manipulation of ferrofluid droplets through magnetic fields, and will allow for better control over the characteristics of networks of stimuli-responsive cellular membranes created through by DIB technique. This work involves several phases. First, a suitable biocompatible ferrofluid is synthesized, containing a neutral pH and a biocompatible surfactant. Once a proper ferrofluid is identified, it is tested as the aqueous phase for the creation of DIB membranes. Interfacial membranes between ferrofluid droplets are created and compared to non-ferrofluid DIB membranes. The interfacial membrane between two ferrofluid droplets was tested for leakage and stability, and the electrical characteristics of the interfacial membrane were studied and compared to non-ferrofluid DIB membranes. Once it is confirmed that the ferrofluid droplets do not negatively interfere with the formation of the artificial cellular membranes through the electrical measurements, the magnetically-responsive nature of the ferrofluid droplets are used to form large networks of DIB membranes through a simple magnetic field. These networks are easy to assemble and may be remotely manipulated, providing a significant step towards the rapid and simple assembly of DIB networks advancing towards the tissue scale.
8
Li, Hongmei, Xiaochen Wang, and Xiao Ye. "Stabilizing the sustained oscillation in an induction motor system with indirect field-oriented control by time-delayed state feedback." In 2009 International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2009. http://dx.doi.org/10.1109/icems.2009.5382718.
Повний текст джерела