Results 31 to 40 of about 23,701 (249)

Relative singularity categories and singular equivalences [PDF]

open access: yesJournal of Homotopy and Related Structures, 2021
Let $R$ be a right notherian ring. We introduce the concept of relative singularity category $ _{\mathcal{X}}(R)$ of $R$ with respect to a contravariantly finite subcategory $\mathcal{X}$ of $\rm{mod}\mbox{-}R.$ Along with some finiteness conditions on $\mathcal{X}$, we prove that $ _{\mathcal{X}}(R)$ is triangle equivalent to a subcategory of the ...
openaire   +2 more sources

Les jeux entre singularité et généricité des savoirs agro-écologiques dans un réseau d’éleveurs

open access: yesRevue d'anthropologie des connaissances, 2018
The ecologisation of agriculture raises many issues about the knowledge needed to support the agroecological transition, both regarding their modes of production and their nature, and their forms of transmission and sharing.
Nathalie Girard, Danièle Magda
doaj   +1 more source

Economías singulares [PDF]

open access: yesLecturas de Economía, 2010
En este artículo pretendemos mostrar que le conjunto de las economías singulares, si bien pequeño desde el punto de vista de la topología y/o desde el punto de vista de la teoría de la medida, tiene importantes efectos en el desarrollo de los regímenes económicos.
openaire   +5 more sources

Kinematics and singularity analysis of UR5 robot

open access: yesJournal of Hebei University of Science and Technology, 2019
In order to solve the problem that the UR5 robot coordinate system established by the user is inconsistent with the manufacturer's, and the data related to the force, angular velocity, angular acceleration are difficult to be directly used, based on the ...
Fuxiang ZHANG, Yang ZHAO
doaj   +1 more source

Singularities from Entropy

open access: yesPhysical Review Letters, 2022
5 pages, 5 figures.
Raphael Bousso, Arvin Shahbazi-Moghaddam
openaire   +3 more sources

On the boundary value problems for ordinary differential equations with isolated singularity

open access: yesLietuvos Matematikos Rinkinys, 2005
We consider some two-point boundary value problems for second order o.d.e. with strong singularity. The asymptotics of the solutions at the singular point are given. The existence and uniqueness of the solutions of those problems are prooved.
Kristina Aldošina, Stasys Rutkauskas
doaj   +1 more source

Unheard and Under‐Supported: Health‐Related Quality of Life in Children, Adolescents, and Young Adults With Sickle Cell Disease

open access: yesPediatric Blood &Cancer, EarlyView.
Abstract Background Sickle cell disease (SCD) is an autosomal recessive hemoglobinopathy affecting millions of individuals worldwide. The clinical expression and psychosocial burden of SCD vary widely across geographical, cultural, and healthcare system contexts, underscoring the need for setting‐specific approaches to assessment.
Desiré Fantasia   +7 more
wiley   +1 more source

The Value of a Happy Population for Relative Engagement in Vertical-Scaling and Horizontal-Scaling Entrepreneurship

open access: yesWorld
We investigate the impact of a country’s population happiness level and happiness inequality on the level of entrepreneurship engagement pursued by individual entrepreneurs in that country.
Fan Jia, André van Stel, Ying Zhang
doaj   +1 more source

A Physical – Geometrical Model of an Early Universe [PDF]

open access: yesINCAS Bulletin, 2014
A physical-geometrical model for a possible early universe is proposed. One considers an initial singularity containing the energy of the whole universe. The singularity expands as a spherical wave at the speed of light generating space and time.
Corneliu BERBENTE
doaj   +1 more source

Arboreal singularities [PDF]

open access: yesGeometry & Topology, 2017
32 pages; 2 figures; to appear in Geometry & ...
openaire   +3 more sources

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