Publicaties
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A more accurate and b-value independent estimation of diffusion parameters using diffusion kurtosis imaging Universiteit Antwerpen
A combined numerical‐experimental approach for the critical hydrogen diffusion depth in steel Universiteit Gent
Herein, a numerical solution of Fick's second law in one dimension with experimentally determined diffusion coefficients at different constant loads is combined with slow strain rate tensile tests and subsequent fractography on dual-phase steel. From the latter, the depth of the hydrogen embrittled region is determined and correlated to concentration profiles determined by the numerical model. The concentration profiles indicate that ...
Modelling of time dependency of chloride diffusion coefficient in cement paste Universiteit Gent
Because of continuous cement hydration and chloride binding during the process of chloride diffusion, the chloride diffusion coefficient changes with time. This paper presents a computer-based model and method to predict the time dependency of chloride diffusion coefficients in cement paste. The HYMOSTRUC3D model is applied to generate a 3D representative elementary volume (REV) of cement paste. In the simulation of microstructure, both of ...
Acinar determinants of the apparent diffusion coefficient for helium-3 Vrije Universiteit Brussel
The apparent diffusion coefficient (ADC) obtained by helium-3 magnetic resonance imaging over several seconds is thought to reflect diffusion impairment due to both intra- and interacinar structure. In this study, numerical simulations of intra-acinar gas mixing and effective diffusion were performed in a multiple-branch-point model of the human acinus. Using a previously described method, we computed the instantaneous effective diffusion ...
Semi-analytical solution for the in-vitro sedimentation, diffusion and dosimetry model: Surveying the impact of the Peclet number Vrije Universiteit Brussel
Reducing size of the particles to the nanoscale range gives them new physicochemical properties. Several
experiments have shown cytotoxic effects for different kinds of engineered nanoparticles (ENP). In-vitro
cell culture assays are widely utilized by researchers to evaluate cytotoxic effects ofthe ENPs. The present paper deals with the "In vitro Sedimentation, Diffusion and Dosimetry (ISDD)" model. This mathematical model uses an ...
experiments have shown cytotoxic effects for different kinds of engineered nanoparticles (ENP). In-vitro
cell culture assays are widely utilized by researchers to evaluate cytotoxic effects ofthe ENPs. The present paper deals with the "In vitro Sedimentation, Diffusion and Dosimetry (ISDD)" model. This mathematical model uses an ...
Novel technique for direct measurement of the plasma diffusion coefficient in magnetized plasma Universiteit Gent
The diffusion coefficient in the edge plasma of fusion devices is measured by a new technique. The method is based on studying the decay of the plasma fluctuation spectrum inside the so-called "Ball-pen probe": a small ceramic tube having its mouth flush with a magnetic surface and a movable electrode inside the tube. When the electrode protrudes from the tube, the measured signal shows the floating potential fluctuations of the plasma or the ...
Extensions and applications of the diffusion model for two-choice response times KU Leuven
Joachim Vandekerckhove, Extensions and applications of the diffu sion model for two-choice response times. Dissertation submitted to obtain the degree of Doctor of Philosophy in Psychology, April 2009. Promoter: Prof. Dr. F. Tuerlinckx. Two-choice response time data (2CRT) is one of the most common formats o f empirical data in experimental psychology. Unfortunately, such data do not adhere to the requirements of standard statistical models ...
Visualization and Quantification of White Matter Impairment in Motor Neuron Disease using Diffusion Tensor Imaging KU Leuven
De Engelse term motor neuron disease (MND) wordt meestal gebruikt om t e verwijzen naar een groep van neurodegeneratieve aandoeningen, waarbij dysfunctie en degeneratie v an het motorische systeem centraal staan. De meest voorkomende vorm (of fenotype) van MND is amyotrofe laterale sclerose (ALS), een aandoening w aarbij de motorneuronen in het ruggenmerg en de hersenstam (de perifere motorneuronen, PMN) en deze in de motor en premotor cortex ...