𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Finite-Difference Approach for the High-Precision Analysis of Rotating-Frame Diffusion Images

✍ Scribed by Klaus Woelk; Bernd L.J Zwank; Peter Trautner; Edmund Lehnhof; Joachim Bargon; Robert J Klingler; Rex E Gerald II; Jerome W Rathke

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
370 KB
Volume
145
Category
Article
ISSN
1090-7807

No coin nor oath required. For personal study only.

✦ Synopsis

A finite-difference approach has been developed for precisely determining diffusion coefficient and T(1) relaxation time in fluid samples analyzed by magnetization-grating rotating-frame imaging (MAGROFI) with either a surface coil or a toroid cavity detector (TCD). This approach avoids shortcomings of phenomenologically based approximations, such as neglect of sample geometries with singularities at the confines of the sample volume, and accounts for the diffusive edge enhancement observed in fluid imaging. Error limits are discussed. The new method has been applied to the determination of the self-diffusion coefficient for MAGROFI experiments using TCDs filled with acetone. Copyright 2000 Academic Press.

πŸ“œ SIMILAR VOLUMES

Spectral and structural analysis of high
Spectral and structural analysis of high precision finite difference matrices for elliptic operators
✍ Stefano Serra Capizzano; Cristina Tablino Possio πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 330 KB

In this paper we study the structural properties of matrices coming from high-precision Finite Dierence (FD) formulae, when discretizing elliptic (or semielliptic) differential operators vY u of the form Strong relationships with Toeplitz structures and Linear Positive Operators (LPO) are highlight

A hybrid finite element/finite differenc
A hybrid finite element/finite difference time domain electromagnetic approach to the analysis of high-frequency FET devices
✍ A. Monorchio; A. Cidronali; G. Manara; G. Pelosi πŸ“‚ Article πŸ“… 2000 πŸ› John Wiley and Sons 🌐 English βš– 273 KB πŸ‘ 2 views

A comprehensive simulation procedure is presented for describing the behaviour of high-frequency "eld e!ect transistors (FETs). It combines a circuit model of the intrinsic part of the device with a hybrid "nite elements/"nite di!erences (FE/FD) technique directly implemented in time domain (TD). Th

Stability analysis of six-point finite d
Stability analysis of six-point finite difference schemes for the constant coefficient convective-diffusion equation
✍ Yue-Kuen Kwok πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 426 KB

Al:mtract--A comprehensive and systematic study is presented to derive stability properties of various two-level, six-point finite difference schemes (in particular, difference schemes of Pad~ type) for the approximation to the constant coefficient convective-ditfusion equation. First, the modified