Results 11 to 20 of about 10,984 (200)

Matching expert range maps with species distribution model predictions [PDF]

open access: yesConservation Biology, Volume 34, Issue 5, Page 1292-1304, October 2020., 2020
Abstract Species’ range maps based on expert opinion are a critical resource for conservation planning. Expert maps are usually accompanied by species descriptions that specify sources of internal range heterogeneity, such as habitat associations, but these are rarely considered when using expert maps for analyses.
Kumar Mainali   +3 more
wiley   +2 more sources

The EM Method in a Probabilistic Wavelet‐Based MRI Denoising [PDF]

open access: yesComputational and Mathematical Methods in Medicine, Volume 2015, Issue 1, 2015., 2015
Human body heat emission and others external causes can interfere in magnetic resonance image acquisition and produce noise. In this kind of images, the noise, when no signal is present, is Rayleigh distributed and its wavelet coefficients can be approximately modeled by a Gaussian distribution.
Marcos Martin-Fernandez   +2 more
wiley   +2 more sources

Topologia da violência [PDF]

open access: yesFilosofia e Educação
Resenha da obra: HAN, Byung-Chul. Topologia da violência. Tradução de Enio Paulo Giachini. Petrópolis, RJ: Vozes, 2017. 269p. 
Adilson Cristiano Habowski, Elaine Conte
openaire   +2 more sources

La topologia del DNA [PDF]

open access: yesButlletí de la Societat Catalana de Matemàtiques, 1999
En aquest article volem parlar d'una interacció de la topologia amb la biologia molecular. Més concretament, volem descriure un model topològic per interpretar l'acció d'un enzim en les molècules de DNA. La teoria de nusos és el camp de la topologia que volem aplicar aquí. Podem pensar un nus com un cercle S1 dins l'espai R3.
Porti, Joan
core   +4 more sources

Morse–Radó theory for minimal surfaces

open access: yesJournal of the London Mathematical Society, Volume 108, Issue 4, Page 1669-1700, October 2023., 2023
Abstract For a class of functions (called minimal Radó functions) that arise naturally in minimal surface theory, we bound the number of interior critical points (counting multiplicity) in terms of the boundary data and the Euler characteristic of the domain of the function.
David Hoffman   +2 more
wiley   +1 more source

Purely coclosed G2‐structures on nilmanifolds

open access: yesMathematische Nachrichten, Volume 296, Issue 6, Page 2236-2257, June 2023., 2023
Abstract We classify seven‐dimensional nilpotent Lie groups, decomposable or of nilpotency step at most 4, endowed with left‐invariant purely coclosed G2‐structures. This is done by going through the list of all seven‐dimensional nilpotent Lie algebras given by Gong, providing an example of a left‐invariant 3‐form φ which is a pure coclosed G2 ...
Giovanni Bazzoni   +2 more
wiley   +1 more source

On the quotient of Milnor and Tjurina numbers for two‐dimensional isolated hypersurface singularities

open access: yesMathematische Nachrichten, Volume 295, Issue 7, Page 1254-1263, July 2022., 2022
Abstract In this paper we give a complete answer to a question posed by Dimca and Greuel about the quotient of the Milnor and Tjurina numbers of a plane curve singularity. We put this question into a general framework of the study of the difference of Milnor and Tjurina numbers for isolated complete intersection singularities showing its connection ...
Patricio Almirón
wiley   +1 more source

On certain real hypersurfaces of quaternionic projective space

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1991
We classify certain real hypersurfaces ot a quaternionic projective space satisfying the condition σ(R(X,Y)SZ)=0.
Juan De Dios Perez, Florentino G. Santos
doaj   +1 more source

Una applicazione della topologia formale ai metodi di ricerca [PDF]

open access: yes, 2022
Lo scopo principale della topologia formale è quello di sviluppare topologia in un contesto costruttivo dove con costruttivo intendiamo un contesto basato sulla logica predicativa e intutizionista.
Andreatta, Denis
core  

Topologies de l'art en l'era de la informació

open access: yesArtnodes, 2013
Hi ha moltes maneres de caracteritzar els últims anys de l'art electrònic i dels nous mitjans, discursos basats en el seu esdevenir històric en paral·lel a l'avanç de les tecnologies, amb les quals experimenta i discuteix; o basats en el desenvolupament ...
Sandra Alvaro
doaj   +1 more source

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