Results 261 to 270 of about 7,166,002 (313)

Generic Bistability in Creased Conical Surfaces

Physical Review Letters, 2015
The emerging field of mechanical metamaterials has sought inspiration in the ancient art of origami as archetypal deployable structures that carry geometric rigidity, exhibit exotic material properties, and are potentially scalable. A promising venue to introduce functionality consists in coupling the elasticity of the sheet and the kinematics of the ...
Lechenault, Frédéric, Adda-Bedia, M.
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Directional curvatures in a conic surface

Applied Optics, 1984
Calcul des courbures sagittales et tangentielles des surfaces coniques (surfaces aspheriques)
C, Menchaca, D, Malacara
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Conic constant and paraxial radius of curvature measurements for conic surfaces

Applied Optics, 1986
From a set of previously derived equations for conic surfaces, we derived another set of equations from which the conic constant k and the paraxial radius of curvature r can be obtained, if at least three values of the longitudinal aberration X and their corresponding angles θ of the normals to the surface are measured. The procedure is useful when the
J R, Díaz-Uribe, A, Cornejo-Rodriguez
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Leidenfrost phenomenon on conical surfaces

Physical Review Fluids, 2016
Experiments on leidenfrost dynamics of water deposited in conical bowls reveal a maximum evaporation time for a given angle of confinement. The drop profile is numerically computed and the different observed regimes are explained as a result of two mechanisms of vapor release: chimneys, suppressed when confinement increases, and lateral flow along the ...
S. Hidalgo-Caballero, Y. Escobar-Ortega, F. Pacheco-Vázquez   +2 more
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FAUST: generation of conic surfaces

Optical Fabrication and Testing, 1996
The method FAUST (Fabrication of Aspherical Ultraprecise Surfaces using a Tube) has been described in a separate paper [Fäh95]: a modified curve generator, which uses a tubular element with a non-circular cross-section, applies loose abrasive ductile grinding with subsequent bowl feed polishing and is employed for the generation of rotationally ...
O.W. Fähnle, H. van Brug, C.J. van der Laan, H.J. Frankena   +3 more
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Tangent Conics at Quartic Surfaces and Conics in Quartic Double Solids

Mathematische Nachrichten, 2000
The abstract: For a quartic double solid \(Z @>\varphi>> \mathbb{P}^3\) we study the parameter space of conics (i.e. of smooth rational curves \(C\subset Z\) such that \(C\cdot \varphi^* {\mathcal O}_{\mathbb{P}^3} (1)=2)\). This parameter space is naturally fibred (with disconnected fibres) over \(\check \mathbb{P}^3\).
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Approximating ocular surfaces by generalised conic curves

Ophthalmic and Physiological Optics, 2006
AbstractMost of the optical models of the human eye use simple conic functions to represent its individual components such as corneal surfaces and the surfaces of the crystalline lens. Although a conic function provides an acceptable approximation for most anatomical eye surfaces, it also leads to a simple optical analysis of the whole eye system.
Kasprzak, Henryk, Iskander, Robert
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Metric aspects of conic surfaces

Frontiers of Mathematics in China, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Bioinspired Janus Textile with Conical Micropores for Human Body Moisture and Thermal Management

Advances in Materials, 2019
Excessive sweat secreted from the skin often causes undesired adhesion from wetted textiles and cold sensations. Traditional hydrophilic textiles such as cotton can absorb sweat but retain it. A hydrophobic/superhydrophilic Janus polyester/nitrocellulose
Bing Dai, Kan Li, Lianxin Shi, Xizi Wan, Xi Liu, Feilong Zhang, Lei Jiang, Shutao Wang   +7 more
semanticscholar   +1 more source

Conics and Quadric Surfaces

2001
If we think of lines, planes and general affine subspaces as sets of points satisfying a linear equation then circles and spheres are examples of sets of points which satisfy a quadratic equation. The solutions to a quadratic equation in the plane are calledconic sectionsor conics for short.
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