Results 31 to 40 of about 41,546 (277)

Calibration of a density-based model of urban morphogenesis. [PDF]

PLoS ONE, 2018
We study a stochastic model of urban growth generating spatial distributions of population densities at an intermediate mesoscopic scale. The model is based on the antagonist interplay between the two opposite abstract processes of aggregation ...
Juste Raimbault
doaj   +1 more source

Diffusion tensor MR microscopy of tissues with low diffusional anisotropy

Radiology and Oncology, 2016
Diffusion tensor imaging exploits preferential diffusional motion of water molecules residing within tissue compartments for assessment of tissue structural anisotropy.
Bajd Franci, Mattea Carlos, Stapf Siegfried, Sersa Igor   +3 more
doaj   +1 more source

First-principles molecular dynamics simulations of proton diffusion in cubic BaZrO $$_3$$ 3 perovskite under strain conditions

Materials for Renewable and Sustainable Energy, 2016
First-principles molecular dynamics simulations have been employed to analyse the proton diffusion in cubic BaZrO $$_3$$ 3 perovskite at 1300 K. A non-linear effect on the proton diffusion coefficient arising from an applied isometric strain up to 2  $$\%
Marco Fronzi, Yoshitaka Tateyama, Nicola Marzari, Michael Nolan, Enrico Traversa   +4 more
doaj   +1 more source

Technical Note: The use of an interrupted-flow centrifugation method to characterise preferential flow in low permeability media [PDF]

Hydrology and Earth System Sciences, 2015
We present an interrupted-flow centrifugation technique to characterise preferential flow in low permeability media. The method entails a minimum of three phases: centrifuge-induced flow, no flow and centrifuge-induced flow, which may be repeated several
R. A. Crane, M. O. Cuthbert, W. Timms
doaj   +1 more source

Modeling Long-Distance Forward and Backward Diffusion Processes in Tracer Transport Using the Fractional Laplacian on Bounded Domains

Fractal and Fractional, 2023
Recent studies have emphasized the importance of the long-distance diffusion model in characterizing tracer transport occurring within both subsurface and surface environments, particularly in heterogeneous systems.
Zhipeng Li, Hongwu Tang, Saiyu Yuan, Huiming Zhang, Lingzhong Kong, HongGuang Sun   +5 more
doaj   +1 more source

Effects of considering preferential diffusion and flame stretch in FGM method for numerical simulations of hydrogen/air flames

Journal of Thermal Science and Technology
One-dimensional numerical simulations of an unstretched propagating hydrogen/air premixed flame and two-dimensional numerical simulations of outwardly propagating hydrogen/air laminar premixed flames are performed using a flamelet-generated manifold (FGM)
Kazuhiro KINUTA, Reo KAI, Ryoichi KUROSE
doaj   +1 more source

Effects of Water Mist on the Initial Evolution of Turbulent Premixed Hydrogen/Air Flame Kernels

Energies
In this study, a series of carrier-phase direct numerical simulations are conducted on spherical expanding premixed hydrogen/air flames with liquid water addition.
Riccardo Concetti, Josef Hasslberger, Nilanjan Chakraborty, Markus Klein   +3 more
doaj   +1 more source

Visualizing spatially inhomogeneous hydrogen isotope diffusion by hydrogenography

Nuclear Materials and Energy, 2023
We developed a novel, recently patented application of hydrogenography, i.e., the change of the optical properties of certain indicator materials (e.g., yttrium) when these are charged with hydrogen isotopes.
A. Manhard, U. von Toussaint, P. Sand, M. Stienecker   +3 more
doaj   +1 more source

Solid-state bonding behavior between surface-nanostructured Cu and Au: a molecular dynamics simulation

Scientific Reports, 2022
In recent years, solid-state bonding has attracted attention for various electronic packaging applications as an alternative to conventional solders. Surface-nanostructured materials enable solid-state bonding without complex surface modifications and ...
Hiroaki Tatsumi, C. R. Kao, Hiroshi Nishikawa   +2 more
doaj   +1 more source

Mechanisms of parasite‐mediated disruption of brain vessels

FEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira, Sílvia Arroz‐Madeira, Cláudio A. Franco, Sara Silva Pereira   +3 more
wiley   +1 more source