Results 51 to 60 of about 882,435 (290)

Mathematical Treatment of Saturated Macroscopic Flow in Heterogeneous Porous Medium: Evaluating Darcy’s Law

Hydrology, 2019
We present a rigorous mathematical treatment of water flow in saturated heterogeneous porous media based on the classical Navier-Stokes formulation that includes vorticity in a heterogeneous porous media.
R. William Nelson, Gustavious P. Williams   +1 more
doaj   +1 more source

Local Entropy Characterization of Correlated Random Microstructures

, 1996
A rigorous connection is established between the local porosity entropy introduced by Boger et al. (Physica A 187, 55 (1992)) and the configurational entropy of Andraud et al. (Physica A 207, 208 (1994)).
A. Beghdadi, Andraud, Andraud, B. Virgin, Bachmat, Beghdadi, Boger, C. Andraud, E. Haslund, Hansen, Haslund, Hilfer, Hilfer, Hilfer, Hilfer, Hilfer, Hilfer, J. Lafait, Lu, O'Neil, R. Hilfer, Stauffer, Virgin   +22 more
core   +2 more sources

Generalized multiscale finite element methods for wave propagation in heterogeneous media [PDF]

, 2013
Numerical modeling of wave propagation in heterogeneous media is important in many applications. Due to the complex nature, direct numerical simulations on the fine grid are prohibitively expensive.
Chung, Eric T., Efendiev, Yalchin, Leung, Wing Tat   +2 more
core   +3 more sources

Reversible Magnetomechanical Modeling of Heterogeneous Media [PDF]

Journal of Superconductivity and Novel Magnetism, 2014
Localization and homogenization of the magnetomechanical fields in heterogeneous media are discussed. The magnetoelastic modeling for magnetic polycrystals is extended from the description of the singlecrystal modeling. This model is then applied to the prediction of the behavior of dual-phase steels.
Wang, Xingjun, Hubert, Olivier, He, Song, Mballa-Mballa, Frederick-Sorel, Huang, Ying   +4 more
openaire   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Disorder-induced Fickian, yet non-Gaussian diffusion in heterogeneous media

Physical Review Research, 2020
Fickian yet non-Gaussian diffusion is observed in several biological and soft matter systems, yet the underlying mechanisms behind the emergence of non-Gaussianity while retaining a linear mean-square displacement remain speculative.
Indrani Chakraborty, Yael Roichman
doaj   +1 more source

Competition and boundary formation in heterogeneous media: Application to neuronal differentiation [PDF]

, 2014
We analyze an inhomogeneous system of coupled reaction-diffusion equations representing the dynamics of gene expression during differentiation of nerve cells. The outcome of this developmental phase is the formation of distinct functional areas separated
Perthame, Benoit, Quiñinao, Cristobal, Touboul, Jonathan   +2 more
core   +6 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Onset of Propagation of Planar Cracks in Heterogeneous Media

, 1997
The dynamics of planar crack fronts in hetergeneous media near the critical load for onset of crack motion are investigated both analytically and by numerical simulations.
A. A. Middleton, A. A. Middleton, A. B. Harris, B. Lawn, D. Ertaş, D. Ertaş, Daniel S. Fisher, G. Perrin, H. Gao, H. Larralde, J. R. Willis, J. Schmittbuhl, J. Schmittbuhl, J. T. Chayes, L. B. Freund, M. Ji, M. Marder, O. Narayan, O. Narayan, O. Narayan, P. Bak, P. G. de Gennes, Sharad Ramanathan, Sharad Ramanathan, Sharad Ramanthan, T. Natterman   +25 more
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source