Results 21 to 30 of about 752 (105)

Curves in the Lorentz-Minkowski plane: elasticae, catenaries and grim-reapers

open access: yesOpen Mathematics, 2018
This article is motivated by a problem posed by David A. Singer in 1999 and by the classical Euler elastic curves. We study spacelike and timelike curves in the Lorentz-Minkowski plane 𝕃2 whose curvature is expressed in terms of the Lorentzian ...
Castro Ildefonso   +2 more
doaj   +1 more source

Adaptaciones geográficas de la casa moderna en Colombia Cuatro casos de estudio en el litoral, el valle, la montaña y el altiplano

open access: yesRevista de Arquitectura (Bogotá), 2022
Se presenta un análisis sobre las relaciones entre la arquitectura doméstica construida durante las décadas de 1950 y 1960 y las características geográficas de Colombia. El artículo expone, a través de las obras, el vínculo orgánico entre el territorio —
Isabel Llanos-Chaparro   +2 more
doaj   +1 more source

BÚSQUEDA SEMI-EXHAUSTIVA DE TOPOLOGÍAS EN SISTEMAS DE POTENCIA PARA MEJORAR CONDICIONES DE SEGURIDAD

open access: yesRevista Politécnica, 2019
En este artículo se presenta un algoritmo orientado a mejorar las condiciones de seguridad de los sistemas de potencia. El algoritmo propuesto realiza una búsqueda semi-exhaustiva de posibles configuraciones de subestaciones con el objetivo de minimizar ...
Carlos Manuel Quintero Castrillón   +2 more
doaj   +1 more source

On the structure vector field of a real hypersurface in complex quadric

open access: yesOpen Mathematics, 2018
From the notion of Jacobi type vector fields for a real hypersurface in complex quadric Qm we prove that if the structure vector field is of Jacobi type it is Killing when the real hypersurface is either Hopf or compact.
Dios Pérez Juan de
doaj   +1 more source

Isoperimetric and Stable Sets for Log-ConcavePerturbations of Gaussian Measures

open access: yesAnalysis and Geometry in Metric Spaces, 2014
Let be an open half-space or slab in ℝn+1 endowed with a perturbation of the Gaussian measureof the form f (p) := exp(ω(p) − c|p|2), where c > 0 and ω is a smooth concave function depending only onthe signed distance from the linear hyperplane parallel ...
Rosales César
doaj   +1 more source

Foundations of Finsler Spacetimes from the Observers’ Viewpoint

open access: yesUniverse, 2020
Physical foundations for relativistic spacetimes are revisited in order to check at what extent Finsler spacetimes lie in their framework. Arguments based on inertial observers (as in the foundations of special relativity and classical mechanics) are ...
Antonio N. Bernal   +2 more
doaj   +1 more source

Willmore‐Like Tori in Killing Submersions

open access: yesAdvances in Mathematical Physics, Volume 2018, Issue 1, 2018., 2018
The first variation formula and Euler‐Lagrange equations for Willmore‐like surfaces in Riemannian 3‐spaces with potential are computed and, then, applied to the study of invariant Willmore‐like tori with invariant potential in the total space of a Killing submersion.
Manuel Barros   +3 more
wiley   +1 more source

A New Algebraic Approach to Decision Making in a Railway Interlocking System Based on Preprocess

open access: yesMathematical Problems in Engineering, Volume 2018, Issue 1, 2018., 2018
The safety of railway networks is a very important issue. Roughly speaking, it can be split into safety along lines and safety of railway facilities such as stations, junctions, yards, etc. In modern networks the safety along lines is controlled by automatic block systems that do not give clearance to trains to enter a section (block) until the latter ...
Antonio Hernando   +3 more
wiley   +1 more source

Láser escáner y nubes de puntos. Un horizonte aplicado al análisis arqueológico de edificios

open access: yesArqueología de la Arquitectura, 2011
En el siguiente artículo analizamos uno de los más modernos instrumentos de documentación gráfica del patrimonio, el láser escáner. Aunque profundizaremos en todos aquellos aspectos técnicos, logísticos y de método relativos a su empleo, nos centraremos ...
Ismael García-Gómez   +2 more
doaj   +1 more source

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