Results 91 to 100 of about 401,077 (355)

GEOMETRY – AN IMPORTANT MEANS OF EDUCATION IN THE CIVILISATION SCOPE

Journal of Industrial Design and Engineering Graphics, 2017
Geometry (from the Greek: γεωμετρία; geo = earth, metria = measure) is a genuine science, rooted in mathematics, which studies the plane and spatial forms of bodies from the objective or conceptual reality and the nature of the relationship that exists ...
Liliana TOCARIU, PhD
doaj  

A MATHEMATICAL SENSOR MODEL FOR INDOOR USE OF A MULTI-BEAM ROTATING 3D LIDAR [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Our contribution presents a new perspective in the mathematical description of a rotating multi-beam LiDAR sensor, in a sense that we make use of projective geometry along with the “homogeneous general equation of the second degree” to parametrize scan ...
L. S. Tessema, L. S. Tessema, R. Jaeger, U. Stilla   +3 more
doaj   +1 more source

Theorems on tangencies in projective and convex geometry [PDF]

arXiv, 2011
We discuss various phenomena of tangency in projective and convex geometry.
arxiv  

Projective differential geometry and asymptotic analysis in General Relativity [PDF]

arXiv, 2021
In this text, we explore the tools that Projective Differential Geometry can provide for the asymptotic analysis of classical fields on projectively compact manifolds. We emphasise on the case of order 2-compactifications and develop, in this case, a projective exterior differential tractor calculus that is analogous to that existing for conformally ...
arxiv  

Metric connections in projective differential geometry

, 2008
We search for Riemannian metrics whose Levi-Civita connection belongs to a given projective class. Following Sinjukov and Mikes, we show that such metrics correspond precisely to suitably positive solutions of a certain projectively invariant finite-type
A.R. Gover, E. Beltrami, E. Cartan, J. Mikeš, N.S. Sinjukov, T.P. Branson, T.Y. Thomas   +6 more
core   +2 more sources

Five‐year evaluation of linear accelerator‐based SRS platform isocentricity

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Linear accelerator (LINAC)‐based stereotactic radiosurgery (SRS) has become a mainstay in the management of intracranial tumors. However, the high fractional doses and sharp gradients used in SRS place heavy demands on geometric accuracy.
Yohan A. Walter, Anne N. Hubbard, Phillip F. Durham, Hsinshun T. Wu   +3 more
wiley   +1 more source

Projective and Analytical Geometry.

The American Mathematical Monthly, 1948
Mode of access: Internet.
Marshall Hall, J. A. Todd
openaire   +3 more sources

Finite geometries: classical problems and recent developments [PDF]

Rendiconti di Matematica e delle Sue Applicazioni, 2007
In recent years there has been an increasing interest in finite projective spaces, and important applications to practical topics such as coding theory, cryptography and design of experiments have made the field even more attractive. Pioneering work has
Joseph A. Thas
doaj  

Complexity calculation of coding and information security system based on threshold secret sharing scheme used for electronic voting

Advanced Engineering Research, 2017
Introduction . One of the tasks arising in cryptography is to ensure the safe and honest conduct of e-voting. This procedure provides that voters submit their votes electronically - for example, through electronic terminals.
Larisa V. Cherkesova, Olga A. Safaryan, Alexander V. Mazurenko, Nadezhda S. Arkhangelskaya   +3 more
doaj   +1 more source

Global deformations of certain rational almost homogeneous projective bundles [PDF]

arXiv, 2016
We study global deformations of certain projective bundles over projective spaces. We show that any projective global deformation of a projective bundle over $\bP^1$ carries the structure of a projective bundle over some projective space. Furthermore, we construct examples in arbitrary dimension $\ge 3$ of almost homogeneous Fano projective bundles ...
arxiv