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Relevant bibliographies by topics / Force dipoles

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Academic literature on the topic 'Force dipoles'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Force dipoles"

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Voropayev, S. I., and Ya D. Afanasyev. "Two-dimensional vortex-dipole interactions in a stratified fluid." Journal of Fluid Mechanics 236 (March 1992): 665–89. http://dx.doi.org/10.1017/s0022112092001575.

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Planar motion produced when a viscous fluid is forced from an initial state of rest is studied. We consider a vortex dipole produced by the action of a point force (Cantwell 1986), and a vortex quadrupole produced by the action of two equal forces of opposite direction. We also present results from an experimental investigation into the dynamics of the interactions between vortex dipoles as well as between vortex dipoles and a vertical wall in a stratified fluid. Theoretical consideration reveals that the dynamics of two-dimensional vortex-dipole interactions are determined by two main governi

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Sun, Chang Q. "Driving Force Behind the O-Rh(001) Clock Reconstruction." Modern Physics Letters B 12, no. 20 (1998): 849–57. http://dx.doi.org/10.1142/s0217984998000974.

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A novel rhombi-chain network is derived from low energy electron diffraction experimental observations and the recent model theory, revealing that the O-Rh(100) clock-rotation is driven by an electrostatic force arisen from bond formation. Thus the O-Rh bond suffers from tension other than compression, or strain relief. As O -1 evolves into the hybridized- O -2,a Rh 5 O cluster in the c(2 × 2) phase develops into a Rh 4 O tetrahedron and yields the overall (2 × 2)p4g reconstruction. In the (2 × 2)p4g phase, the hollow-sited O -2 defines one Rh + ion and two lone-pair-induced Rh dipoles of its

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Szilard, Daniela, Patrícia P. Abrantes, Felipe A. Pinheiro, Felipe S. S. Rosa, Carlos Farina, and Wilton J. M. Kort-Kamp. "Optical Forces on an Oscillating Dipole Near VO2 Phase Transition." Universe 7, no. 6 (2021): 159. http://dx.doi.org/10.3390/universe7060159.

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We investigate optical forces on oscillating dipoles close to a phase change vanadium dioxide (VO2) film, which exhibits a metal-insulator transition around 340 K and low thermal hysteresis. This configuration emulates the interaction between an illuminated nanosphere and an interface and we employ a classical description to capture its important aspects. We consider both electric and magnetic dipoles for two different configurations, namely with the dipole moments parallel and perpendicular to the VO2 film. By using Bruggeman theory to describe the effective optical response of the material,

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Man, Dariusz, Marian Podolak, and Ryszard Olchawa. "Computer Simulations of the Electric Interactions between the Phospholipid Head-Groups and Ionic Admixtures in the Membrane Surface." Zeitschrift für Naturforschung C 56, no. 5-6 (2001): 402–6. http://dx.doi.org/10.1515/znc-2001-5-613.

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Some phospholipids (e.g. lecithin) form a system of electric dipoles on the membrane surface layer. In the case of lecithin the positive dipole charge is located on the choline and the negative one on the phosphoric molecule group. These dipoles are arranged almost parallel to the membrane surface. Taking the dipole membrane structure as a base for further investigations, a computer model of the electrostatic interaction between the dipole system and the ionic admixture was investigated. The model presumes hexagonal centered or a rectangular flat geometry of the 121 dipoles distribution. The d

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Voropayev, S. I., Ya D. Afanasyev, and I. A. Filippov. "Horizontal jets and vortex dipoles in a stratified fluid." Journal of Fluid Mechanics 227 (June 1991): 543–66. http://dx.doi.org/10.1017/s0022112091000241.

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When a horizontal force is applied locally to some volume of a viscous densitystratified fluid, flows with high concentration of vertically oriented vorticity (vortex dipoles) are generated. The processes of generation and evolution with time of these unsteady flows in a stratified fluid are studied. A convenient way to produce and study these flows in the laboratory is to use a submerged horizontal jet as a ‘point’ source of momentum. The main governing parameter (the ‘force’) is easily controlled in this case. Two regimes were studied: starting jets with dipolar vortex fronts (the force acts

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Roberts, M. D. "Torsional dipoles." Canadian Journal of Physics 66, no. 4 (1988): 338–40. http://dx.doi.org/10.1139/p88-054.

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An attempt is made to introduce dipole structure into gravitational theory. We do this by trying to produce torsion tensors with the same form as the electric-field tensor for an electric dipole. First, we construct Ricci tensors for space-times with vanishing Christoffel connections. Then we discuss the conditions to put on the tensors. Each condition gives differential equations; however, none of the solutions provides an entirely satisfactory dipole structure. Finally, we briefly discuss how to "force" axially symmetric space-times having dipole structure.

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Kosugi, Y., B. He, and Y. Hayashi. "A Network Inversion Technique for Estimating Equivalent Dipole Description of Visual Evoked Potential." Methods of Information in Medicine 39, no. 02 (2000): 134–37. http://dx.doi.org/10.1055/s-0038-1634280.

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Abstract:For the activation study of the brain, dipole localization from the scalp potential is one of the most promising techniques to realize a reasonable temporal resolution which cannot be realized in functional MR and PET. The goal of our study is to estimate inversely the electrical brain activity in the form of several dipoles from the scalp potential, using a network inversion technique. As a basic approach, we have inversely estimated several dipoles from the potential distribution on a spherical surface, in the homogeneous sphere model.In the training phase, by expanding the neural n

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Zheng, Yi. "A Generalization of Electromagnetic Fluctuation-Induced Casimir Energy." Advances in Condensed Matter Physics 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/198657.

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Intermolecular forces responsible for adhesion and cohesion can be classified according to their origins; interactions between charges, ions, random dipole—random dipole (Keesom), random dipole—induced dipole (Debye) are due to electrostatic effects; covalent bonding, London dispersion forces between fluctuating dipoles, and Lewis acid-base interactions are due to quantum mechanical effects; pressure and osmotic forces are of entropic origin. Of all these interactions, the London dispersion interaction is universal and exists between all types of atoms as well as macroscopic objects. The dispe

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Jahng, Junghoon, Eric O. Potma, and Eun Seong Lee. "Nanoscale spectroscopic origins of photoinduced tip–sample force in the midinfrared." Proceedings of the National Academy of Sciences 116, no. 52 (2019): 26359–66. http://dx.doi.org/10.1073/pnas.1913729116.

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When light illuminates the junction formed between a sharp metal tip and a sample, different mechanisms can contribute to the measured photoinduced force simultaneously. Of particular interest are the instantaneous force between the induced dipoles in the tip and in the sample, and the force related to thermal heating of the junction. A key difference between these 2 force mechanisms is their spectral behavior. The magnitude of the thermal response follows a dissipative (absorptive) Lorentzian line shape, which measures the heat exchange between light and matter, while the induced dipole respo

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Assis, A. K. T. "Deriving gravitation from electromagnetism." Canadian Journal of Physics 70, no. 5 (1992): 330–40. http://dx.doi.org/10.1139/p92-054.

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We present a generalized Weber force law for electromagnetism including terms of fourth and higher orders in v/c. We show that these extra terms yield an attractive force between two neutral dipoles in which the negative charges oscillate around the positions of equilibrium. This attractive force can be interpreted as the usual Newtonian gravitational force as it is of the correct order of magnitude, is along the line joining the dipoles, follows Newton's action and reaction law, and falls off as the inverse square of the distance.

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Dissertations / Theses on the topic "Force dipoles"

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Mansuripur, Masud. "Nature of the electromagnetic force between classical magnetic dipoles." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/627076.

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The Lorentz force law of classical electrodynamics states that the force F exerted by the magnetic induction B on a particle of charge q moving with velocity V is given by F = qV x B Since this force is orthogonal to the direction of motion, the magnetic field is said to be incapable of performing mechanical work. Yet there is no denying that a permanent magnet can readily perform mechanical work by pushing/pulling on another permanent magnet - or by attracting pieces of magnetizable material such as scrap iron or iron filings. We explain this apparent contradiction by examining the magnetic L

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Gasparoto, Henrique Fagundes 1984. "Simulação magnetostática 3D por dipolos magnéticos equivalentes." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263473.

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Orientador: Luiz Otávio Saraiva Ferreira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-23T05:25:00Z (GMT). No. of bitstreams: 1 Gasparoto_HenriqueFagundes_M.pdf: 20120157 bytes, checksum: 1a0b108d3b6380d0ca446e17b2bc749b (MD5) Previous issue date: 2013<br>Resumo: Motivado pelo projeto de dispositivos magnetomecânicos, este trabalho consiste na modelagem e simulação macroscópicas de corpos constituídos de materiais magnéticos, em frequência nula, representados por arranjos de dipolos magnéticos elementare

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Schwarz, Ulrich Sebastian. "Forces and elasticity in cell adhesion." Thesis, Universität Potsdam, 2004. http://opus.kobv.de/ubp/volltexte/2005/110/.

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Das Verhalten adhärenter Zellen hängt stark von den chemischen, topographischen und mechanischen Eigenschaften ihrer Umgebung ab. Experimentelle Untersuchungen der letzten Jahre haben gezeigt, dass adhärente Zellen aktiv die elastischen Eigenschaften ihrer Umgebung erkunden, indem sie an dieser ziehen. Der resultierende Kraftaufbau hängt von den elastischen Eigenschaften der Umgebung ab und wird an den Adhäsionskontakten in entsprechende biochemische Signale umgewandelt, die zelluläre Programme wie Wachstum, Differenzierung, programmierten Zelltod und Zellbewegung mitbestimmen. Im Allgemeinen

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Xuereb, Andre. "Optical cooling using the dipole force." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/205463/.

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The term `laser cooling' is applied to the use of optical means to cool the motional energies of either atoms and molecules, or micromirrors. In the literature, these two strands are kept largely separate; both, however suffer from severe limitations. Laser cooling of atoms and molecules largely relies on the internal level structure of the species being cooled. As a result, only a small number of elements and a tiny number of molecules can be cooled this way. In the case of micromirrors, the problem lies in the engineering of micromirrors that need to satisfy a large number of constraints|the

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Webster, Stephen. "Prospects for Bose-Einstein condensation in caesium : cold collisions and dipole-force trapping." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325563.

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Wanis, Sameh Sadarous. "Tailored Force Fields for Flexible Fabrication." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10540.

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The concept of tailored force fields is seen as an enabler for the construction of large scale space structures. Manufacturing would take place in space using in-situ resources thereby eliminating the size and weight restriction commonly placed on space vehicles and structures. This thesis serves as the first investigation of opening the way to a generalized fabrication technology by means of force fields. Such a technology would be non-contact, flexible, and automated. The idea is based on the principle that waves carry momentum and energy with no mass transport. Scattering and gradient f

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Bischofs, Ilka Bettina. "Elastic interactions of cellular force patterns." Phd thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973638915.

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Wadensjö, Alexandra. "Electrostatic forces on a CO molecule : Simulating an AFM image." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-75756.

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In atomic force microscopy (AFM), the measured force between tip and substrate is used to produce images with subatomic resolution. In this thesis, plausible electrostatic interactions between tip-substrate is studied and compared with the experimental results in the report Vibrations of a molecule in an external force field by Okabayashi et al.. A simplified model gives by hand that the interaction between substrate and tip is dominated by a point charge - point charge relation due to the interatomic distances in AFM. We find that the electrostatic interaction can reproduce the experiment dow

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Dinh-Truong, Thuy Linh. "An efficient algorithm combining cell multipole and multigrid methods for rapid evaluation of dipole iteration in polarizable force fields." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3238427.

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Thesis (Ph. D.)--University of California, San Diego, 2007.<br>Title from first page of PDF file (viewed January 4, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 142-164).

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Peyrot, Tom. "Dipole dipole interactions in dense alkali vapors confined in nano-scale cells." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLO012/document.

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Les vapeurs atomiques confinées dans des cellules nanométriques constituent une plateforme intéressante pour la réalisation de senseurs atomiques. Dans cette thèse, nous étudions l’interaction entre la lumière et un ensemble d’atomes d’alcalins dans une telle cellule. Nous nous concentrons sur les phénomènes qui pourraient modifier la réponse optique du système et ainsi affecter la sensibilité du senseur. Premièrement, nous étudions la réponse non locale à la lumière induite par le mouvement des atomes dans la vapeur thermique. Quand la distance de relaxation des atomes excède la taille de la

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Books on the topic "Force dipoles"

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Xuereb, André. Optical Cooling Using the Dipole Force. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-29715-1.

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service), SpringerLink (Online, ed. Optical Cooling Using the Dipole Force. Springer Berlin Heidelberg, 2012.

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Optical Cooling Using The Dipole Force. Springer, 2012.

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Xuereb, André. Optical Cooling Using the Dipole Force. Springer, 2014.

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Deruelle, Nathalie, and Jean-Philippe Uzan. Gravitational radiation. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198786399.003.0054.

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This chapter attempts to calculate the radiated energy of a source in the linear approximation of general relativity to infinity in the lowest order. For this, the chapter first expands the Einstein equations to quadratic order in metric perturbations. It reveals that the radiated energy is then given by the (second) quadrupole formula, which is the gravitational analog of the dipole formula in Maxwell theory. This formula is a priori valid only if the motion of the source is due to forces other than gravity. Finally, this chapter shows that, to prove this formula for the case of self-gravitat

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George, Birnbaum, ed. Phenomena induced by intermolecular interactions. Plenum Press, 1985.

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Book chapters on the topic "Force dipoles"

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Gooch, Jan W. "Dipole–Dipole Forces." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_3788.

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Metcalf, Harold J., and Peter van der Straten. "The Dipole Force." In Graduate Texts in Contemporary Physics. Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-1470-0_9.

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Nishida, Hiroyuki, Hiroyuki Ogawa, and Yoshifumi Inatani. "MHD Analysis of Force Acting on Dipole Magnetic Field in Magnetized Plasma Flow." In Computational Fluid Dynamics 2006. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-92779-2_120.

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Niikura, Hiromichi, P. B. Corkum, and D. M. Villeneuve. "Coherent cooling of molecular vibrational motion with laser-induced dipole forces." In Springer Series in Chemical Physics. Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27213-5_260.

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Bordry, F., L. Bottura, A. Milanese, et al. "Accelerator Engineering and Technology: Accelerator Technology." In Particle Physics Reference Library. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34245-6_8.

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AbstractMagnets are at the core of both circular and linear accelerators. The main function of a magnet is to guide the charged particle beam by virtue of the Lorentz force, given by the following expression:where q is the electrical charge of the particle, v its velocity, and B the magnetic field induction. The trajectory of a particle in the field depends hence on the particle velocity and on the space distribution of the field. The simplest case is that of a uniform magnetic field with a single component and velocity v normal to it, in which case the particle trajectory is a circle. A uniform field has thus a pure bending effect on a charged particle, and the magnet that generates it is generally referred to as a dipole.

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Friedrich, B. "CHAPTER 9. Manipulation of Molecules by Combined Permanent and Induced Dipole Forces." In Theoretical and Computational Chemistry Series. Royal Society of Chemistry, 2021. http://dx.doi.org/10.1039/9781839163043-00317.

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Ageyev, A. I., V. I. Balbekov, Yu P. Dmitrevsky, et al. "Test Results on Full-Scale Superconducting Dipole Models for UNK in Force-Circulating Cooling Mode." In Advances in Cryogenic Engineering. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2213-9_18.

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Daum, C. "Three-Dimensional Computation of Magnetic Fields and Lorentz Forces of an LHC Dipole Magnet." In New Techniques for Future Accelerators III. Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-5859-6_7.

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ter Avest, D., C. Daum, and H. H. J. ten Kate. "Magnetic Fields and Lorentz Forces in an LHC Dipole Magnet; 3-D Analysis Using the Fem Program Tosca." In 11th International Conference on Magnet Technology (MT-11). Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0769-0_11.

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Daum, C., and D. ter Avest. "Three-Dimensional Computation of Magnetic Fields and Lorentz Forces of an LHC Dipole Magnet Using the Method of Image Currents." In 11th International Conference on Magnet Technology (MT-11). Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0769-0_52.

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Conference papers on the topic "Force dipoles"

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Yaghjian, Arthur D. "Force on Dipoles and Hidden Momentum." In 2018 International Conference on Electromagnetics in Advanced Applications (ICEAA). IEEE, 2018. http://dx.doi.org/10.1109/iceaa.2018.8520414.

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Mansuripur, Masud. "Nature of the electromagnetic force between classical magnetic dipoles." In Spintronics X, edited by Henri Jaffrès, Henri-Jean Drouhin, Jean-Eric Wegrowe, and Manijeh Razeghi. SPIE, 2017. http://dx.doi.org/10.1117/12.2273216.

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Pan, E. "Force Dipoles in Anisotropic Materials: Cell Orientation Guided by Substrate Anisotropy?" In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59138.

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Recent studies on cell orientation have shown that cells can actively sense the elastic properties of their environment and strengthen contacts and cytoskeleton in a direction of large effective stiffness. For example, it was found that cells oriented perpendicular to clamped boundaries whilst parallel to free boundaries. It was also suggested that active mechanosensing in an elastically anisotropic medium might lead to cell orientation. In this paper, we first develop an analytical force-dipole solution in anisotropic materials. We then apply this solution to investigate the effect of substra

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Filippov, Sergey Ivanovich. "SIMULATION OF THE CIRCULATION FLOW AROUND CIRCULAR PIPES BY A FLOW OF HOMOGENEOUS OR LAYERED BOUNDED LIQUID." In XII Международная научно-практическая конференция «Новые импульсы развития: вопросы научных исследований». KDU, Moscow, 2021. http://dx.doi.org/10.31453/kdu.ru.978-5-7913-1175-7-2021-11-16.

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The paper studies the uncirculatory and circulatory flow around long circular pipes with a flow of homogeneous and two-layer liquid while limiting the flow to a solid bottom and a solid lid. The method of flat sections is used. The boundaries are modeled by dipoles of unknown intensity, whose density is determined from the boundary conditions. Calculations of the lifting force and wave resistance are presented.

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Zichen He, Minghe Cao, Nana Wang, et al. "Electron-pinned defect-dipoles for SrTiO3-based ceramics with high permittivity and low dielectric loss." In 2016 Joint IEEE International Symposium on the Applications of Ferroelectrics, European Conference on Application of Polar Dielectrics, and Piezoelectric Force Microscopy Workshop (ISAF/ECAPD/PFM). IEEE, 2016. http://dx.doi.org/10.1109/isaf.2016.7578071.

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Erol, Anil, Saad Ahmed, Paris von Lockette, and Zoubeida Ounaies. "Analysis of Microstructure-Based Network Models for the Nonlinear Electrostriction Modeling of Electro-Active Polymers." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3979.

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Relaxor ferroelectric polymers are a unique branch of electro-active polymers (EAPs) that generate high electromechanical strain with relatively low hysteresis and high nonlinearity. Polyvinylidene fluoride-based EAPs possess these qualities due to the semicrystalline nature of their microstructure. The interactions of electric dipoles within the microstructure of the material generate large strains under an external electric field, and the reduced crystalline domain sizes yield a relaxor effect by exhibiting low hysteresis and hyperelastic properties. This phenomenon has been partially modele

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Forth, Scott C., Balkrishna S. Annigeri, and William D. Keat. "Life Prediction for Complex Structures." In ASME Turbo Expo 2000: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0630.

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The surface integral method, an indirect boundary element method that represents a crack as a distribution of force dipoles, has been developed to model 3D nonplanar crack growth in complex structures. The finite body was effectively modeled by superposition of stress influence functions for a half-space. As a result of this strategy, only the fracture has to be discretized. Crack propagation was modeled using the maximum circumferential stress theory to predict crack direction and the Forman fatigue equation, modified with an equivalent stress intensity solution for mixed-mode, to predict ext

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Alazemi, Saad F., and Mohammed F. Daqaq. "Ferrofluids for Concurrent Vibration Absorption and Energy Harvesting." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3298.

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This paper proposes a novel Tuned Magnetic Fluid Damper (TMFD) with energy harvesting capabilities to concurrently mitigate structural vibrations and harvest vibratory energy. The energy harvesting TMFD consists of a rectangular container carrying a magnetized ferrofluid and mounted on a vibrating structure. The ferrofluids geometric and material properties (height, surface area, magnetization) are tuned such the first modal frequency of the fluid column matches the first modal frequency of the structure. The one-to-one resonant interactions between the structure and the fluid column results i

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Zhang, Wenlong, and Hafiz M. Atassi. "Sound Radiation From a Propeller in a Submerged Rib-Stiffened Duct." In ASME 2008 Noise Control and Acoustics Division Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ncad2008-73019.

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This paper examines the interaction of nonuniform flows with propeller blades in a submerged elastic duct. The acoustic radiation from the duct is calculated and correlated to the flow nonuniformities and the propeller and duct characteristics. The case of a stiffened duct with ribs is also considered and the dispersion relation of the duct modes is compared with that of a regular duct. The dispersion relation of the stiffened duct has a periodic structure similar to that of connected oscillators with large number of independent modes. Because of our interest in the acoustic radiation of such

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Forth, Scott C., and William D. Keat. "Nonplanar Crack Growth Using the Surface Integral Method." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-539.

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A surface integral formulation, based on representing a crack as a distribution of force dipoles, has been developed for modeling the propagation of a three-dimensional nonplanar fracture. The minimum strain energy density, and maximum circumferential stress theories were used to determine the direction of crack growth. The extension of the fracture surface was based on the Paris Law for fatigue. Remeshing of the fracture during growth was accomplished by adding a ring of elements to the existing mesh at the conclusion of each increment of crack growth. This promoted the efficiency of the algo

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Reports on the topic "Force dipoles"

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Gupta R. C. and G. Morgan. Magnetic forces on the laminations of the Booster dipole. Office of Scientific and Technical Information (OSTI), 1987. http://dx.doi.org/10.2172/1150468.

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