Results 41 to 50 of about 4,529,073 (321)
Radiology Case Reports, 2022 The hemostatic effect of radiation therapy on gastric cancer with bleeding is known. However, blood tests and endoscopes are mainly used to determine the therapeutic effect.
Osamu Tanaka, MD +7 more
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Low-Complexity Numerical Approach for the Diffusion Equation with Variable Diffusion Coefficient
MathematicsThe diffusion equation models a wide variety of physical and chemical processes and has significant interest in many scientific disciplines. Analytical and numerical methods found in the literature for solving the diffusion equation consider a constant ...
Marta Zárraga-Rodríguez +2 more
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New insights into natural gas diffusion coefficient in rocks
Petroleum Exploration and Development, 2012 Based on the analysis of measuring methods and results of natural gas diffusion coefficient in rocks and the measurement of methane diffusion coefficient in the Upper Paleozoic rocks of the Ordos basin, this paper clarifies the meaning of natural gas ...
Guangdi LIU +5 more
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Self-diffusion in granular gases: Green-Kubo versus Chapman-Enskog
, 2005 We study the diffusion of tracers (self-diffusion) in a homogeneously cooling gas of dissipative particles, using the Green-Kubo relation and the Chapman-Enskog approach. The dissipative particle collisions are described by the coefficient of restitution
Abramowitz M., Ben-Naim E., Resibois P.
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Density-dependent diffusion in the periodic Lorentz gas [PDF]
, 1999 We study the deterministic diffusion coefficient of the two-dimensional periodic Lorentz gas as a function of the density of scatterers. Results obtained from computer simulations are compared to the analytical approximation of Machta and Zwanzig [Phys ...
Dellago, Chr., Klages, R.
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Nature Communications, 2020 Hydrogen peroxide (H2O2) synthesis by electrochemical oxygen reduction reaction has attracted great attention as a green substitute for anthraquinone process. However, low oxygen utilization efficiency (
Qizhan Zhang +5 more
semanticscholar +1 more source
Radial diffusion coefficient mapping
The British Journal of Radiology, 1992 Abstract The two-dimensional mapping of the effective diffusion coefficient of water in tissues may provide a useful method of tissue characterization to complement T 1 and T 2 relaxation time studies for diagnostic purposes. Current diffusion techniques rely on the application of large gradient strengths and long echo times to achieve
A, Madden, M O, Leach
openaire +2 more sources
Dependence of chaotic diffusion on the size and position of holes
, 2012 A particle driven by deterministic chaos and moving in a spatially extended environment can exhibit normal diffusion, with its mean square displacement growing proportional to the time.
Carl P. Dettmann +6 more
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Comparison of material properties of SCC concrete with steel fibres related to ingress of chlorides [PDF]
, 2020 The paper focuses on the evaluation of chloride ion diffusion coefficient of self-compacting concrete with steel fibre reinforcement. The reference concrete from Ordinary Portland Cement (OPC) and Self-Compacting Concrete (SCC) with several values of ...
Konečný, Petr +2 more
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, 2018 We present a systematic study of the self-diffusion coefficient for a fluid of particles interacting via the square-well pair potential by means of molecular dynamics simulations in the canonical (N,V,T) ensemble.
Nicasio-Collazo, Luz Adriana +2 more
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