Results 81 to 90 of about 148,947 (238)
Darboux Frame of Pancake Curve in Euclidean 3-Space
Cumhuriyet Science JournalIn this paper, we focus on a rare curve, “The pancake curve” which was named by Robert Ferréol. We investigate the Darboux frame of the curve, and we calculate the curvatures: geodesic curvature, normal curvature, and geodesic torsion.
Emre Öztürk
doaj +1 more source
On totally umbilical and minimal surfaces of the Lorentzian Heisenberg groups
Mathematische Nachrichten, Volume 298, Issue 6, Page 1922-1942, June 2025.Abstract This paper has manifold purposes. We first introduce a description of the Gauss map for submanifolds (both spacelike and timelike) of a Lorentzian ambient space and relate the conformality of the Gauss map of a surface to total umbilicity and minimality.
Giovanni Calvaruso +2 more
wiley +1 more source
Timber roof structure for outdoor auditorium in Parque Paraiso, San Blas (Madrid)
, 2009 p. 468-475A timber shell structure is designed to provide covering for an outdoor auditorium in Madrid (Spain). The covering comprises five independent overlapped marquees with similar shape but diverse dimensions.
ANTON, Arturo +2 more
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Multi-feed cone Cassegrain antenna Patent [PDF]
, 1970 Design and operation of multi-feed cone Cassegrain ...
Katow, M. S. +2 more
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THE RESULTS OF DIFFERENT METHODS OF CALCULATION OF A NON-SHALLOW HYPERBOLIC PARABOLOID
Structural Mechanics of Engineering Constructions and Buildings, 2016 Two methods of analysis of a non-shallow hyperbolic paraboloid are presented in the pa- per. The first approximate method was fulfilled with the help of the analytical formulas but the second one was made due to SP 52-117-2008 "Reinforced Concrete ...
O O Aleshina
doaj
Chemistry – A European Journal, Volume 31, Issue 27, May 14, 2025.High regioselection in the synthesis of brominated and amino‐substituted 1,3‐diazaazulenes enables regiocontrolled access to a series of differently substituted 4‐, 6‐, and 8‐amino‐1,3‐diazaazulenes with soft‐tunable optical properties. The tetra‐aminosubstituted diazaazulenes are not entirely planar, as observed by crystallographic and computational ...
Teppo O. Leino +4 more
wiley +1 more source
Development and Implementation of NURBS Models of Quadratic Curves and Surfaces [PDF]
, 2009 This article goes into the development of NURBS models of quadratic curves and surfaces. Curves and surfaces which could be represented by one general equation (one for the curves and one for the surfaces) are addressed. The research examines the curves:
G. Petkov, Emiliyan
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Implicit equations of non-degenerate rational Bezier quadric triangles
, 2015 In this paper we review the derivation of implicit equations for non-degenerate quadric patches in rational Bezier triangular form. These are the case of Steiner surfaces of degree two.
Canton, A. +3 more
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International Journal for Numerical Methods in Biomedical Engineering, Volume 41, Issue 3, March 2025.This review article examines computational and bench testing approaches in coronary bifurcation stenting, focusing on procedural strategies, stent design, and patient‐specific factors. Key findings highlight the potential of computational methods, such as finite element analysis and computational fluid dynamics, to assess stent performance, optimize ...
Andrea Colombo +11 more
wiley +1 more source
Primordial magnetic fields constrained by CMB anisotropies and dynamo cosmology
, 2009 Magneto-curvature stresses could deform magnetic field lines and this would give rise to back reaction and restoring magnetic stresses [Tsagas, PRL (2001)].
C. Chicone +9 more
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