Results 81 to 90 of about 571,031 (268)
Contour detection with bicubic spline surfaces
International Journal of Digital Earth, 2023 Contour detection has a rich history in multiple fields such as geography, engineering, and earth science. The predominant approach is based on piecewise planar tessellation and now being challenged concerning the extraction of contour objects for non ...
Hiroyuki Goto, Taiki Otsuka
doaj +1 more source
Mean curvature 1 surfaces in hyperbolic 3-space with low total curvature I [PDF]
Hiroshima Math. J. 34 (2004), 21-56, 2000 A complete surface of constant mean curvature 1 (CMC-1) in hyperbolic 3-space with constant curvature -1 has two natural notions of "total curvature"-- one is the total absolute curvature which is the integral over the surface of the absolute value of the Gaussian curvature, and the other is the dual total absolute curvature which is the total absolute
arxiv
An amphipathic helix enables septins to sense micrometer-scale membrane curvature
Journal of Cell Biology, 2019 Cell shape is well described by membrane curvature. Septins are filament-forming, GTP-binding proteins that assemble on positive, micrometer-scale curvatures. Here, we examine the molecular basis of curvature sensing by septins.
Kevin S. Cannon +3 more
semanticscholar +1 more source
Preference for curvature: A historical and conceptual framework
Frontiers in Human Neuroscience, 2016 The idea that curved contours appear to be more pleasurable to the human eye than straight lines is a recurrent theme in aesthetic literature that has been occasionally explored from the scientific psychology.
Gerardo eGómez-Puerto +3 more
doaj +1 more source
Riemannian curvature: variations on different notions of positivity [PDF]
Habilitation thesis, July 2006, Montpellier II University, France, 2006 We study different notions of Riemannian curvatures: The $p$-curvatures which interpolate between the scalar curvature and the sectional curvature, the Gauss-Bonnet-Weyl curvatures form another interpolation from the scalar curvature to the Gauss-Bonnet integrand. We bring out the $(p,q)$-curvatures, which incorporate all the previous curvatures.
arxiv
Membrane curvature induces cardiolipin sorting
Communications Biology, 2019 Cardiolipin is a cone-shaped lipid predominantly localized in curved membrane sites of bacteria and in the mitochondrial cristae. This specific localization has been argued to be geometry-driven, since the CL’s conical shape relaxes curvature frustration.
Elena Beltrán-Heredia +5 more
semanticscholar +1 more source
ON THE FLAG CURVATURE OF FINSLER METRICS OF SCALAR CURVATURE [PDF]
Journal of the London Mathematical Society, 2003 23 ...
Xiaohuan Mo, Xinyue Chen, Zhongmin Shen
openaire +3 more sources
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2019 On a 4-manifold of conformal torsion-free connection with zero signature (--++) we found conditions under which the conformal curvature matrix is dual (self-dual or anti-self-dual).
Leonid Nikolaevich Krivonosov +1 more
doaj +1 more source
Curvature Estimates for Four-Dimensional Gradient Steady Ricci Solitons [PDF]
arXiv, 2014 In this paper, we derive certain curvature estimates for 4-dimensional gradient steady Ricci solitons either with positive Ricci curvature or with scalar curvature decay.
arxiv
Medium-scale curvature at larger radii in finitely generated groups [PDF]
arXiv, 2020 In this paper we study medium scale curvature, a notion of Ricci curvature for groups. We show that dead-end elements yield non-negative curvature. We make use of related elements to find large classes of positive curvature in the lamplighter and Houghton's group.
arxiv