Results 11 to 20 of about 26,863 (267)
Biomechanical analysis of different rotary files in varying root canal curvatures: a 3D finite element analysis study [PDF]
BMC Oral HealthBackground Proper biomechanical preparation of the root canal system is fundamental to the success of endodontic therapy. Curved root canals represent a major clinical challenge, increasing the risk of procedural errors such as canal transportation ...
Yathrib Mansy +3 more
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Axioms, 2021 We introduce the fourth fundamental form of a Dini-type helicoidal hypersurface in the four dimensional Euclidean space E4. We find the Gauss map of helicoidal hypersurface in E4. We obtain the characteristic polynomial of shape operator matrix. Then, we
Erhan Güler
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Approximation of Gaussian Curvature by the Angular Defect: An Error Analysis
Mathematical and Computational Applications, 2021 It is common practice in science and engineering to approximate smooth surfaces and their geometric properties by using triangle meshes with vertices on the surface.
Marie-Sophie Hartig
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PADIŞ - A GEOMORPHOMETRIC APPROACH [PDF]
Analele Universităţii din Oradea: Seria Geografie, 2022 This study presents a unitary morphometric analysis for one of the most spectacular karst sectors in Romania: the closed basin Padiș – Cetățile Ponorului.
Lucian BLAGA, Grigore Vasile HERMAN
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Mathematics, 2021 According to the Frenet equations of the null curves in semi-Euclidean 4-space, the existence conditions and the geometrical characterizations of the Bertrand curves of the null curves are given in this paper.
Jianguo Sun, Yanping Zhao
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Geometrical Structure in a Relativistic Thermodynamical Fluid Spacetime
Axioms, 2023 The goal of the present research paper is to study how a spacetime manifold evolves when thermal flux, thermal energy density and thermal stress are involved; such spacetime is called a thermodynamical fluid spacetime (TFS). We deal with some geometrical
Mohd. Danish Siddiqi +3 more
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Normal Curves in 4-Dimensional Galilean Space G4
Frontiers in Physics, 2021 In this article, first, we give the definition of normal curves in 4-dimensional Galilean space G4. Second, we state the necessary condition for a curve of curvatures τ(s) and σ(s) to be a normal curve in 4-dimensional Galilean space G4. Finally, we give
Safaa Mosa +3 more
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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
Aravinda, C. S., Farrell, F. T.
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Smarandache-Based Ruled Surfaces with the Darboux Vector According to Frenet Frame in $E^3$
Journal of New Theory, 2022 The paper introduces a new kind of special ruled surface. The base of each ruled surface is taken to be one of the Smarandache curves of a given curve according to Frenet frame, and the generator (ruling) is chosen to be the corresponding unit Darboux ...
Elif Çan +2 more
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Blindness to Curvature and Blindness to Illusory Curvature [PDF]
i-Perception, 2018 We compare two versions of two known phenomena, the Curvature blindness and the Kite mesh illusions, to highlight how similar manipulations lead to blindness to curvature and blindness to illusory curvature, respectively. The critical factor is a change in luminance polarity; this factor interferes with the computation of curvature along the contour ...
Bertamini, Marco, Kitaoka, Akiyoshi
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