Results 21 to 30 of about 967,777 (294)

Gas Steady-state Diffusion in Fractal Porous Media [PDF]

E3S Web of Conferences, 2021
Gas diffusion in fractal pores does not follow the classic Fick’s and Knudsen’s laws, so more research on gas diffusion in fractal porous media is needed. Fractal pore models are generated using the random walk method.
Zhehua Du
doaj   +1 more source

Diffusive Transport in Periodic Potentials: Underdamped Dynamics [PDF]

, 2008
In this paper we present a systematic and rigorous method for calculating the diffusion tensor for a Brownian particle moving in a periodic potential which is valid in arbitrary dimensions and for all values of the dissipation.
Pavliotis, G. A., Vogiannou, A.
core   +1 more source

Performance of apparent diffusion coefficient values and ratios for the prediction of prostate cancer aggressiveness across different MRI acquisition settings

Diagnostic and Interventional Radiology, 2022
PURPOSE:In this study, we assessed the performance of apparent diffusion coefficient (ADC) and diffusion-weighted imaging (DWI) metrics and their ratios across different magnetic resonance imaging (MRI) acquisition settings, with or without an endorectal
Ercan Karaarslan, Aylin Altan Kus, Deniz Alis, Umut Can Karaarslan, Yesim Saglican, Omer Burak Argun, Ali Riza Kural   +6 more
doaj   +1 more source

Generalized Exclusion Processes: Transport Coefficients [PDF]

, 2014
A class of generalized exclusion processes parametrized by the maximal occupancy, $k\geq 1$, is investigated. For these processes with symmetric nearest-neighbor hopping, we compute the diffusion coefficient and show that it is independent on the spatial
Arita, Chikashi, Krapivsky, P. L., Mallick, Kirone   +2 more
core   +2 more sources

Surface diffusion coefficients for room acoustics : free-field measures [PDF]

, 2000
A surface diffusion coefficient is needed in room acoustics to enable the quality of diffusing surfaces to be evaluated. It may also facilitate more accurate geometric room acoustic models.
Cox, TJ, D'Antonio, P, Hargreaves, TJ, Lam, YW   +3 more
core   +1 more source

Apparent diffusion coefficient values and normalised apparent diffusion coefficient values in grading of glioma

Interdisciplinary Neurosurgery
Objectives: To evaluate the correlation between the grades of glioma and quantitative analysis of ADC (Apparent diffusion coefficient) values and normalised ADC values on DWI (Diffusion weighted imaging).
Abhijeet Gourishetty, K. Suprasanna, Nitin Joseph   +2 more
doaj   +1 more source

The Effective Diffusion Coefficient of Hydrogen in Tungsten: Effects of Microstructures From Phase-Field Simulations

Frontiers in Materials, 2022
In this work, we propose an efficient numerical method to study the effects of microstructures on the effective diffusion coefficient of the diffusion component in materials. We take the diffusion of hydrogen (H) atoms in porous polycrystalline tungsten (
Bingchen Li, Bingchen Li, Bowen Xue, Bowen Xue, Jiannan Hao, Jiannan Hao, Shuo Jin, Shuo Jin, Hong-Bo Zhou, Hong-Bo Zhou, Linyun Liang, Linyun Liang, Guang-Hong Lu, Guang-Hong Lu   +13 more
doaj   +1 more source

Diffusion-induced bistability of driven nanomechanical resonators [PDF]

, 2011
We study nanomechanical resonators with frequency fluctuations due to diffusion of absorbed particles. The diffusion depends on the vibration amplitude through inertial effect.
A. Isacsson, J. Atalaya, L. D. Landau, M. I. Dykman, W. Horsthemke   +4 more
core   +3 more sources

Nonparametric Bayesian estimation of a H\"older continuous diffusion coefficient [PDF]

, 2019
We consider a nonparametric Bayesian approach to estimate the diffusion coefficient of a stochastic differential equation given discrete time observations over a fixed time interval.
Gugushvili, Shota, Schauer, Moritz, Spreij, Peter, van der Meulen, Frank   +3 more
core   +2 more sources

Diffusion Tests for Chloride in Concrete Using Wind Tunnel Test

MATEC Web of Conferences, 2017
Diffusion coefficient of chloride in concrete is a predominant factor in chloride penetration into concrete. Two types of diffusion coefficient models are examined here: mean diffusion coefficient D, time-dependent diffusion coefficient D(t).
Nuralinah Devi, Shimomura Takumi
doaj   +1 more source