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Gradient flows, second-order gradient systems and convexity
(Society for Industrial and Applied Mathematics Publications, 2018)
We disclose an interesting connection between the gradient flow of a C
2
-
smooth function ψ and evanescent orbits of the second order gradient system defined
by the square-norm of ∇ψ, under adequate convexity assumption. ...
A model for thermal gradient and heat flow in central Chile: The role of thermal properties
(Elsevier Ltd, 2019)
The aim of this work is to quantify variations in heat flow and thermal gradient patterns at the latitude of central Chile and to evaluate the role of thermal properties of macro-geological units within the lithosphere. ...
Convergence of fractional adaptive systems using gradient approach
(Elsevier, 2017)
Conditions for boundedness and convergence of the output error and the parameter error for various Caputo's fractional order adaptive schemes based on the steepest descent method are derived in this paper. To this aim, the ...
Landscape disturbance gradients: the importance of the type of scene when evaluating landscape preferences and perceptions
(MDPI, 2020)
Understanding of people's landscape preferences is important for decision-making about land planning, particularly in the disturbance patterns that usually occur in rural-urban gradients. However, the use of different types ...
New fossil woods from lower Cenozoic volcano-sedimentary rocks of the Fildes Peninsula, King George Island, and the implications for the trans-Antarctic Peninsula Eocene climatic gradient
(Wiley-Blackwell Publishing Ltd, 2020)
Ten embedded fossil logs sampled in situ from the middle Eocene volcano-sedimentary rocks close to Suffield Point in the Fildes Peninsula, King George Island, Antarctica, are assigned to Protopodocarpoxylon araucarioides ...
New fossil woods from lower cenozoic volcano-sedimentary rocks of the fildes peninsula, King George Island, and the implications for the trans-antarctic peninsula Eocene climatic gradient
(Wiley, 2020)
Ten embedded fossil logs sampled in situ from the middle Eocene volcano-sedimentary rocks close to Suffield Point in the Fildes Peninsula, King George Island, Antarctica, are assigned to Protopodocarpoxylon araucarioides ...
Landscape structure along urban-rural gradients: Aisén river watershed (Aisén region, Chile) Estructura del paisaje a lo largo de gradientes urbano-rurales en la cuenca del río aisén (región de Aisén, Chile)
(2009)
Changes in landscape structure are generally associated to physical, biological and social factors. However, their integrated analysis is rarely done. The objective of this study was to determine the distribution patterns ...
Latitudinal gradients of haemosporidian parasites: prevalence, diversity and drivers of infection in the Thorn-tailed Rayadito (Aphrastura spinicauda)
(Elsevier, 2020)
Latitudinal gradients are well-suited systems that may be helpful explaining distribution of haemosporidian parasites and host susceptibility. We studied the prevalence, diversity and drivers of haemosporidian parasites ...
Existence and multiplicity results for degenerate elliptic equations with dependence on the gradient
(2007)
We study the existence of positive solutions for a class of degenerate nonlinear elliptic equations with gradient dependence. For this purpose, we combine a blowup argument, the strong maximum principle, and Liouville-type ...
Decoding the role of tectonics, incision and lithology on drainage divide migration in the Mt. Alpi region, southern Apennines, Italy
(Elsevier, 2017)
The proclivity of river networks to progressively carve mountain surfaces and preservemarkers of landscape adjustments
has made analyses of fluvial systems fundamental for understanding the topographic development ...