Results 41 to 50 of about 3,278,211 (362)

Density-dependence tips the change of plant–plant interactions under environmental stress

Nature Communications, 2020
Density-dependence is rarely accounted for in plant-plant facilitation studies. Here the authors develop a framework that incorporates density-dependence in the stress-gradient hypothesis, and test it first through modeling and then empirically on ...
Ruichang Zhang, Katja Tielbörger
doaj   +1 more source

Location of Nodal Solutions for Quasilinear Elliptic Equations with Gradient Dependence

, 2017
Existence and regularity results for quasilinear elliptic equations driven by \begin{document}$(p, q)$\end{document} -Laplacian and with gradient dependence are presented.
D. Motreanu, V. Motreanu, Abdelkrim Moussaoui   +2 more
semanticscholar   +1 more source

Dependence of bacterial chemotaxis on gradient shape and adaptation rate.

PLoS Computational Biology, 2008
Simulation of cellular behavior on multiple scales requires models that are sufficiently detailed to capture central intracellular processes but at the same time enable the simulation of entire cell populations in a computationally cheap way.
Nikita Vladimirov, Linda Løvdok, Dirk Lebiedz, Victor Sourjik   +3 more
doaj   +1 more source

Size-Dependent Behaviour of Representative Volume Element for Granular Material under Gravity-Induced Stress Gradient

Advances in Materials Science and Engineering, 2022
Gravity is the primary load source in geotechnical engineering, and its effect becomes extremely important in these cases such as lunar research station construction and in situ resource utilization. However, at the current stage, the study on the effect
Ruilin Li, Yukun Ji, Jun Chen, Daqing Chen, Shangyue Cai   +4 more
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Diffusion dispersion imaging: Mapping oscillating gradient spin‐echo frequency dependence in the human brain

Magnetic Resonance in Medicine, 2019
Oscillating gradient spin‐echo (OGSE) diffusion MRI provides information about the microstructure of biological tissues by means of the frequency dependence of the apparent diffusion coefficient (ADC).
A. Arbabi, J. Kai, Ali R. Khan, C. Baron
semanticscholar   +1 more source

Range dependent phase gradient autofocus [PDF]

IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174), 1998
The Phase Gradient Autofocus (PGA) algorithm has been widely used in spotlight synthetic aperture radar (SAR) to remove motion-induced blurs in the images. The PGA algorithm has been proven to be a superior autofocus method. PGA assumes a narrow beam, which is valid for most SAR systems.
D.G. Thompson, J.S. Bates, D.V. Arnold, D.G. Long, A. Robertson   +4 more
openaire   +1 more source

On the Sub and Supersolution Method for Nonlinear Elliptic Equations with a Convective Term, in Orlicz Spaces

Mathematics
In this note we provide an overview of some existence (with sign information) and regularity results for differential equations, in which the method of sub and supersolutions plays an important role.
Giuseppina Barletta
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Frequency-dependent diffusion kurtosis imaging in the human brain using an oscillating gradient spin echo sequence and a high-performance head-only gradient

NeuroImage, 2023
Measuring the time/frequency dependence of diffusion MRI is a promising approach to distinguish between the effects of different tissue microenvironments, such as membrane restriction, tissue heterogeneity, and compartmental water exchange. In this study,
Erpeng Dai, Ante Zhu, Grant K. Yang, Kristin Quah, Ek T. Tan, Eric Fiveland, Thomas K.F. Foo, Jennifer A. McNab   +7 more
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Existence of positive solutions for nonlinear dirichlet problems with gradient dependence and arbitrary growth

, 2018
We consider a nonlinear elliptic problem driven by the Dirichlet p-Laplacian and a reaction term which depends also on the gradient (convection). No growth condition is imposed on the reaction term f (z, ·, y).
Nikolaos S. Papageorgiou, C. Vetro, F. Vetro   +2 more
semanticscholar   +1 more source

THE ABUNDANCE OF HELIUM AND STELLAR PULSATION

Odessa Astronomical Publications, 2017
Radial gradient of relative amplitude of the light variation FV for galactic classical Cepheids is found. The gradient has different signs for two cases: P > 8d and P < 8d. For P > 8d the gradient is negative.
V. V. Kovtyukh
doaj   +1 more source