Robert J. Wagner (9857666), Franck J. Vernerey (11778544) · Figshare · 2022
<p><b>(A)</b> The origins of the pairwise repulsive force acting at the position of structural node <i>i</i> due to the proximity of water node <i>ω</i> is illustrated in 1D. The force is taken as the gradient in energy landscape from <i>ω</i> to <i>i</i>. <b>(B)</b> Similarly, the lack of any pairwise repulsive force acting at the positions between structural node <i>i</i> and structural node <i>ρ</i> is visually illustrated by the lack of a gradient in the local energy.</p> <p>(TIF)</p>
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Rebekka Verheij (330159), Eli Brenner (330160), Jeroen B. J. Smeets (307442) · Figshare · 2015
<p>Three examples to show the direction of the repulsive force and which surface areas exert a repulsive force on the tip.</p>
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Ion Boldea · 2023
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Manxia Liu (4252579), Weiliang Zeng (4252582), Peng Chen (6514) et al. · Figshare · 2017
<p>A vehicle is now represented by an ellipse with the radius which depends on the angle between the moving direction of the vehicle and the moving direction of a close-by pedestrian.</p>
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Wengang Liu · The ECPH Encyclopedia of Mining and Metallurgy · 2024
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Luigi Rosa, Astrid Lambrecht · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology · 2010
In this paper the Casimir energy of two parallel plates made by materials of different penetration depth and no medium in between is derived. We study the Casimir force density and derive analytical constraints on the two penetration depths which are sufficient conditions to ensure repulsion. Compared to other methods our approach needs no specific model for dielectric or magnetic material properties and constitutes a complementary analysis.
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Rosa, Luigi, Lambrecht, Astrid · arXiv (Cornell University) · 2010
In this paper the Casimir energy of two parallel plates made by materials of different penetration depth and no medium in between is derived. We study the Casimir force density and derive analytical constraints on the two penetration depths which are sufficient conditions to ensure repulsion. Compared to other methods our approach needs no specific model for dielectric or magnetic material properties and constitutes a complementary analysis.
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Makoto Ishikawa, Norio Inui, Masaya Ichikawa et al. · Journal of the Physical Society of Japan · 2011
We have observed the Casimir normal and lateral forces between gold and silica (or gold) separated by bromobenzene (liquid). The Casimir forces between gold and silica separated by the liquid exhibit a repulsive behavior, although those between gold and gold separated by the liquid exhibit an attractive behavior. There are several layers of bromobenzene molecules on the silica plate, although there exist tens of layers on the gold plate, because the compressive forces that effectively work for each molecule in the case of repulsive force become weaker. The Casimir force between the solids is in good agreement with the calculated one in the context of a continuum model consisting of solids separated by a liquid.
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Zhao, R., Zhou, J., Koschny, Th. et al. · arXiv (Cornell University) · 2009
We demonstrate theoretically that one can obtain repulsive Casimir forces and stable nanolevitations by using chiral metamaterials. By extending the Lifshitz theory to treat chiral metamaterials, we find that a repulsive force and a minimum of the interaction energy exist for strong chirality, under realistic frequency dependencies and correct limiting values (for zero and infinite frequencies) of the permittivity, permeability, and chiral coefficients.
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L. Satpathy, S. K. Patra · Journal of Physics G Nuclear and Particle Physics · 2004
The infinite nuclear matter mass model and the relativistic mean field theory show a strong evidence of new neutron magic numbers 100, 150, 164; proton magic number 78 and new islands of stability around N = 100, Z ≃ 62; N = 150, Z = 78 and N = 164, Z ≃ 90 in the drip-line regions of nuclear chart. It is shown that the shell effect stabilizes the instability due to the repulsive component of the nuclear force giving rise to a new phenomenon, complementary to the phenomena of fission isomer and superheavy elements where repulsive Coulomb instability is overcome by the same. This will result in the broadening of the stability peninsula.
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Hui Wen (505110), Weixin Xie (3280737), Jihong Pei (3280734) · Figshare · 2016
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Anonymous · Physics · 2019
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Wilson, Justin H., Allocca, Andrew A., Galitski, Victor M. · arXiv (Cornell University) · 2015
Weyl semimetals are a class of topological materials that exhibit a bulk Hall effect due to time-reversal symmetry breaking. We show that for the idealized semi-infinite case, the Casimir force between two identical Weyl semimetals is repulsive at short range and attractive at long range. Considering plates of finite thickness, we can reduce the size of the long-range attraction even making it repulsive for all distances when thin enough. In the thin-film limit, we study the appearance of an attractive Casimir force at shorter distances due to the longitudinal conductivity. Magnetic field, thickness, and chemical potential provide tunable nobs for this effect, controlling the Casimir force: whether it is attractive or repulsive, the magnitude of the effect, and the positions and existence of a trap and antitrap.
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Guoding Xu, Jian Sun, Taocheng Zang et al. · Applied Physics A · 2011
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Arthur Hobson Quinn · Historical Studies in the Physical Sciences · 1982
Research Article| January 01 1982 Repulsive Force in England, 1706-1744 Arthur Quinn Arthur Quinn Search for other works by this author on: This Site PubMed Google Scholar Historical Studies in the Physical Sciences (1982) 13 (1): 109–128. https://doi.org/10.2307/27757507 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Arthur Quinn; Repulsive Force in England, 1706-1744. Historical Studies in the Physical Sciences 1 January 1982; 13 (1): 109–128. doi: https://doi.org/10.2307/27757507 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentHistorical Studies in the Natural Sciences Search This content is only available via PDF. Copyright 1982 The Regents of the University of California Article PDF first page preview Close Modal You do not currently have access to this content.
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Abdelsalam, M. K., Eyssa, Y. M., Mcintosh, G. E. et al. · NASA Technical Reports Server (NASA)
A new concept in magnetic levitation and control is introduced for levitation above a plane. A set of five vertical solenoid magnets mounted flush below the plane supports and controls the model in five degrees of freedom. The compact system of levitation coils is contained in a space 2.4 m (96 in) diameter by 1 m (40 in) deep with the top of the levitation system 0.9 m (36 in) below the center line of the suspended model. The levitated model has a permanent magnet core held in position by the five parallel superconductive solenoids symmetrically located in a circle. The control and positioning system continuously corrects for model position in five dimensions using computer current pulses superimposed on the levitation coil base currents. The conceptual designs include: superconductive and Nd-Fe-B permanent magnet model cores and levitation solenoids of either superconductive, cryoresistive, or room temperature windings.
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Garry J. Tee · ResearchSpace (University of Auckland) · 1999
Brachistochrones for inverse square repulsion are expressed in terms of elliptic integrals, as for inverse square attraction. But, the set of brachistochrones is much more complicated than for inverse square attraction. Each pair of points is connected by infinitely many brachistochrones, on each of which the passage time is a local minimum, and the global minimum passage time is attained on one (or on infinitely many) of those curves. The bounded brachistochrones starting at a fixed point are separated from the unbounded brachistochrones by a Critical Brachistochrone, which is expressed in terms of elementary functions.
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Rongkuo Zhao, Jiangfeng Zhou, Thomas Koschny et al. · Physical Review Letters · 2009
We demonstrate theoretically that one can obtain repulsive Casimir forces and stable nanolevitations by using chiral metamaterials. By extending the Lifshitz theory to treat chiral metamaterials, we find that a repulsive force and a minimum of the interaction energy possibly exist for strong chirality, under realistic frequency dependencies and correct limiting values (for zero and infinite frequencies) of the permittivity, permeability, and chiral coefficients.
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Ethan W. Schaler, Tarek I. Zohdi, Ronald S. Fearing · Sensors and Actuators A Physical · 2017
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Christiansen, J.K.S., Andersen, L.G., Frederiksen, S.L. et al. · Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) · 1999
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