Results 11 to 20 of about 270,582 (289)
Nonpositivity: Curvature vs. curvature operator [PDF]
Proceedings of the American Mathematical Society, 2004 It is shown that there exist closed Riemannian manifolds M M all of whose sectional curvatures are negative, but M M does not admit any metric with nonpositive curvature operator.
Aravinda, C. S., Farrell, F. T.
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Exploring Benefits of Using Blending Splines as Transition Curves
Applied Sciences, 2020 Track geometry is a fundamental subject in railway construction. With the demand for increased capacity in terms of load and speed, the need for suitable transitions between consecutive track sections is highly relevant.
Tanita Fossli Brustad, Rune Dalmo
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IEEE Access, 2022 Aiming at the problems in the best basis selection, this paper presents a novel criterion based on the statistical measurement of the curvature wavelet coefficient to dynamically select the single best basis of the quad-tree wavelet packet transformation.
Regina Lionnie +3 more
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International Journal of Modern Physics D, 2002 The issues of quintessence and cosmic acceleration can be discussed in the framework of higher order theories of gravity. We can define effective pressure and energy density directly connected to the Ricci scalar of curvature of a generic fourth order theory and then ask for the conditions to get an accelerated expansion.
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Curvature-Based Machine Vision Method for Measuring the Dimension of Ball Screws
IEEE Access, 2023 As a linear actuator, accurate dimension measurement is crucial to the transmission reliability and interchangeability of ball screws. However, most of the current approaches are ineligible for rapid ball screw in-situ inspections due to the installation
Yijia Chen +5 more
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Sensing Membrane Curvature [PDF]
Developmental Cell, 2003 AbstractTransport vesicle formation and fusion are highly regulated processes that require the sequential assembly and disassembly of proteinacious membrane coats. Recent work suggests that one of the coat proteins senses the local changes in lipid packing that accompany membrane bending during vesiculation, and thus acts as a timer for coat ...
Holthuis, J.C.M., Burger, K.N.J.
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Earth's curvature and visibility between two points [PDF]
Vojnotehnički Glasnik, 2012 In this study, the Earth's curvature is analyzed from numerous aspects as well as the visibility between two points on the Earth's surface. It also describes the way and the size of the Earth's part which can be approximated in the plane depending on the
Mirko A. Borisov, Radoje D. Banković
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SSRN Electronic Journal, 2021 In a Mirrleesian environment, a monopsonist sets hourly wages and individuals choose how many hours to work. Labor market outcomes do not only depend on the level and slope of the income tax function, but also on its curvature. A more concave tax schedule raises the elasticity of labor supply, which boosts wages.
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Curvature Potential Unveiled Topological Defect Attractors
Crystals, 2021 We consider the theoretical and positional assembling of topological defects (TDs) in effectively two-dimensional nematic liquid crystal films. We use a phenomenological Helfrich–Landau–de Gennes-type mesoscopic model in which geometric shapes and ...
Luka Mesarec +5 more
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Mathematische Annalen, 2015 The purpose of this paper is to interpret the phase transition in the Loewner theory as an analog of the hyperbolic variant of the Schur theorem about curves of bounded curvature. We define a family of curves that have a certain conformal self-similarity property. They are characterized by a deterministic version of the domain Markov property, and have
Lind, Joan R., Rohde, Steffen
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