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Gradient versus proper gradient homotopies [PDF]
Homology, Homotopy and Applications, 2021 We compare the sets of homotopy classes of gradient and proper gradient vector fields in the plane. Namely, we show that gradient and proper gradient homotopy classifications are essentially different. We provide a complete description of the sets of homotopy classes of gradient maps from $\mathbb{R}^n$ to $\mathbb{R}^n$ and proper gradient maps from $\
Bartłomiejczyk, Piotr +1 more
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Morphogen Gradient Formation [PDF]
Cold Spring Harbor Perspectives in Biology, 2009 How morphogen gradients are formed in target tissues is a key question for understanding the mechanisms of morphological patterning. Here, we review different mechanisms of morphogen gradient formation from theoretical and experimental points of view. First, a simple, comprehensive overview of the underlying biophysical principles of several mechanisms
Wartlick +4 more
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Gradientes de velocidad en la Corteza y Manto Superior de las islas Baleares (Mar Mediterráneo)
Geofísica Internacional, 1980 En este trabajo se presenta un estudio de amplitudes para las ondas refractadas en el basamento y manto superior a partir de datos de perfiles sísmicos realizados en las islas Baleares durante el año 1976.
D. Cordoba, E. Banda
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Geofísica Internacional, 2009 El presente trabajo estudia la distribución espacial de los rayos cósmicos galácticos en la heliosfera durante el máximo solar de los ciclos 21, 22 y 23, usando un modelo en una dimensión y sin choque de la ecuación de transporte de la radiación cósmica.
O. G. Morales-Olivares +1 more
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Valores de P para determinar si opera la selección natural en la naturaleza: aprovechando su potencial [PDF]
, 2018 After 34 years of the development of Lande and Arnold's (1983) model to quantify natural selection on multivariate quantitative phenotypic traits, researchers still heavily rely on p-values to determine whether natural selection operates or not on ...
Palacio, Facundo Xavier
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Hajłasz gradients are upper gradients
Journal of Mathematical Analysis and Applications, 2015 10 ...
Jiang, Renjin +3 more
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Botanical Sciences, 2007 Los bosques de las montañas del sur de México han sido fragmentados y alterados en su estructura y composición florística por agricultura tradicional asociada al crecimiento poblacional.
Mario González-Espinosa +5 more
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Análise do Conteúdo de Vapor D’água na Camada Limite Atmosférica Marinha sobre a Região da Confluência Brasil-Malvinas Entre os Anos de 2004 e 2015 [PDF]
Anuário do Instituto de Geociências, 2017 A concentração de vapor d’água na camada limite atmosférica marinha (CLAM) sobre a região da Confluência Brasil-Malvinas (CBM), no Oceano Atlântico Sudoeste, foi analisada através de dados tomados durante dez cruzeiros oceanográficos realizados durante
Rose Ane Pereira de Freitas +3 more
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Gradient Estimation Revitalized [PDF]
IEEE Transactions on Visualization and Computer Graphics, 2010 We investigate the use of a Fourier-domain derivative error kernel to quantify the error incurred while estimating the gradient of a function from scalar point samples on a regular lattice. We use the error kernel to show that gradient reconstruction quality is significantly enhanced merely by shifting the reconstruction kernel to the centers of the ...
Alim, Usman, R. +2 more
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Early effects of 7.5% hypertonic saline solution on splanchnic perfusion after hemorrhagic shock [PDF]
, 2006 PURPOSE: To evaluate the effects of SSH resuscitation on systemic and splanchnic hemodynamic variables in an experimental model of controlled hemorrhagic shock.
Cruz Junior, Ruy Jorge +4 more
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