Results 21 to 30 of about 872,384 (282)

On the Generalized Curvature [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2006
By using methods of nonstandard analysis given by Robinson, A., and axiomatized by Nelson, E., we try in this paper to establish the generalized curvature of a plane curve at regular points and at points infinitely close to a singular point.
Tahir Ismail, Ibrahim Hamad
doaj   +1 more source

Energy Singularity: From Scarcity to Abundance

open access: yesForesight and STI Governance, 2013
The ability to extract and use energy played a decisive role in the development of human civilization. Energy consumption is growing exponentially, thus the only way to avoid future energy crisis is to explore renewable, more abundant sources.
José Luis Cordeiro
doaj   +1 more source

Strength of the naked singularity in critical collapse

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
The critical collapse of a scalar field is a threshold solution of black hole formation, in which a naked singularity arises. We study here the curvature strength of this singularity using a numerical ansatz.
Jun-Qi Guo   +4 more
doaj   +1 more source

Mathematical Singularities in the Farthest Confines of the Universe—And a Brief Report on Its Evolutionary History

open access: yesUniverse, 2023
It is advisable to avoid and, even better, demystify such grandiose terms as “infinity” or “singularity” in the description of the cosmos. Its proliferation does not positively contribute to the understanding of key concepts that are essential for an ...
Emilio Elizalde
doaj   +1 more source

Structural stability of the two-fold singularity [PDF]

open access: yes, 2012
At a two-fold singularity, the velocity vector of a flow switches discontinuously across a codimension one switching manifold, between two directions that both lie tangent to the manifold. Particularly intricate dynamics arises when the local flow curves
Angulo Garcia, David   +4 more
core   +1 more source

Physical Processes in Naked Singularity Formation [PDF]

open access: yes, 2002
Gravitational collapse is one of the most fruitful subjects in gravitational physics. It is well known that singularity formation is inevitable in complete gravitational collapse. It was conjectured that such a singularity should be hidden by horizons if
Chandrasekhar   +7 more
core   +3 more sources

Adaptive Proportional Integral Derivative Nonsingular Dual Terminal Sliding Mode Control for Robotic Manipulators

open access: yesDynamics, 2023
This article aims to develop a new Adaptive Proportional Integral Derivative (PID) Nonsingular Dual Terminal Sliding Mode Control, designed for tracking the position of robot manipulators under disturbances and uncertainties.
Hiep Dai Le, Tamara Nestorović
doaj   +1 more source

Superconformal field theory on threebranes at a Calabi-Yau singularity [PDF]

open access: yes, 1998
Just as parallel threebranes on a smooth manifold are related to string theory on AdS5 × S5, parallel threebranes near a conical singularity are related to string theory on AdS5 × X5, for a suitable X5.
I. Klebanov, E. Witten
semanticscholar   +1 more source

Singularity

open access: yesPrzestrzenie Teorii, 2015
This text is devoted to the singularity and theatricalization of the humanities.
Anna Krajewska
doaj   +1 more source

The Concept of “Community” in the Social Ontology of J.-L.Nancy and J. Agamben [PDF]

open access: yesГуманитарный вектор, 2021
The article discusses new ontological approaches to the concept of “community” that appeared after the “ontological turn”. If ontotheology (metaphysics) in search of the foundation of the existing (society) takes the existing beyond the limits of the ...
Evgeny A. Prokhorov
doaj   +1 more source

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