Results 11 to 20 of about 2,881 (262)

Influence of Die Surface Topography and Lubrication on the Product Quality during Indirect Extrusion of Copper-Clad Aluminum Rods

open access: yesMetals, 2020
Copper-clad aluminum rods are usually fabricated using hydrostatic extrusion, since during direct and indirect extrusion fracture of the copper sleeve is difficult to avoid.
Stefan Kuhnke   +4 more
doaj   +1 more source

Study of Optical Models Regarding the Human Eye [PDF]

open access: yesIranian Journal of Medical Physics, 2011
Introduction: Until now, many models have been presented for optical study of the human eye. In recent years, surgery on the anterior section of the eye (such as cataract and photo-refractive surgery) has increased, so a study on the optics of the eye ...
Maryam Abolmasoomi   +3 more
doaj   +1 more source

A Unified General Theory of Conic Sections via the Conic Radical

open access: yesMathematics
In this paper, we bring forth several new general formulae in the classic study of conics in the Analytic Geometry: the coordinates of all vertices and focal points of arbitrary parabolas, ellipses, and hyperbolas; lengths for all latera recta from any ...
Mauricio Chávez-Pichardo   +2 more
doaj   +1 more source

Approximation of conic sections by weighted Lupaş post-quantum Bézier curves

open access: yesDemonstratio Mathematica, 2022
This paper deals with weighted Lupaş post-quantum Bernstein blending functions and Bézier curves constructed with the help of bases via (p,q)\left(p,q)-integers. These blending functions form normalized totally positive bases.
Khan Asif   +3 more
doaj   +1 more source

Learning Trajectory for Pre-Service Mathematics Teachers in Geometry through the Context of Bengkulu Conic-Section Batik Patterns

open access: yesInovasi Matematika
The understanding of analytic geometry is often hindered by its abstract presentation and its disconnection from local contexts familiar to students.
Ratnah Lestary   +2 more
doaj   +1 more source

THE HYPERBOLOID OF REVOLUTION OF ONE NAPPE A RULED SURFACE GENERATING CONICS

open access: yesJournal of Industrial Design and Engineering Graphics, 2013
The paper intends to underline the property of the hyperboloid of revolution of one nappe to generate on its surface, when it is cut by a plane, the three known conics (ellipse, hyperbola and parabola).Cutting this surface by a plane, we find the ...
Gabriel Oprea, Ana Maria Mihaela Rugescu
doaj   +4 more sources

PENGEMBANGAN MODUL IRISAN KERUCUT BERBANTUAN GEOGEBRA

open access: yesAksioma: Jurnal Program Studi Pendidikan Matematika, 2017
The aim of this research was to develop a conic section modul. The modul used GeoGebra in presenting material. This research used development model of Plomp, with three step including preliminary research, prototyping stage and assesment phase.
Arta Ekayanti
doaj   +1 more source

Infrared laser sampling of low volumes combined with shotgun lipidomics reveals lipid markers in palatine tonsil carcinoma

open access: yesMolecular Oncology, EarlyView.
Nanosecond infrared laser (NIRL) low‐volume sampling combined with shotgun lipidomics uncovers distinct lipidome alterations in oropharyngeal squamous cell carcinoma (OPSCC) of the palatine tonsil. Several lipid species consistently differentiate tumor from healthy tissue, highlighting their potential as diagnostic markers.
Leonard Kerkhoff   +11 more
wiley   +1 more source

Area Properties of Strictly Convex Curves

open access: yesMathematics, 2019
We study functions defined in the plane E 2 in which level curves are strictly convex, and investigate area properties of regions cut off by chords on the level curves.
Dong-Soo Kim   +2 more
doaj   +1 more source

Crafting Conic Sections [PDF]

open access: yesMath Horizons, 2021
Circles, ellipses, parabolas, and hyperbolas are called conic sections because each of these curves arises as the boundary of a slice of a cone. Imagine slicing a solid cone of clay.
openaire   +1 more source

Home - About - Disclaimer - Privacy