This post is not going to be the most exciting I have ever written. We will derive the expression of the elastic energy of a linear spring as a function of the displacement of its two end-points. I will need this expression in my series on “What is homogenization”. Having …
Articles in the posts category
17 November 2017 — Announcing the defense of my “Habilitation à Diriger des Recherches”
On monday 20th, november 2017 (at 13:30), I will be defending my "Habilitation à Diriger des Recherches" at École des Ponts ParisTech in front of the following jury
- Renald Brenner (Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7190, Institut Jean le Rond d\'Alembert, F-75005, Paris, France),
- Samuel …
31 May 2017 — Scrapy-ing the NIST X-ray Attenuation Databases
I am currently preparing with two other colleagues a review paper on X-ray tomography of cementitious materials, for which I need to retrieve tabulated values of the X-ray mass attenuation coefficients of all elements. NIST provides such data (see X-Ray Mass Attenuation Coefficients by J. H. Hubbell and S. M …
29 May 2015 — Orientation correlations among rice grains, part 4: defining the ROI
In the previous instalment of this series, we obtained binned slices of the sample. Fig. 1 below displays a typical example of these binned slices. We now want to segment the rice grains. However, the analysis (in particular, Otsu thresholding) might be perturbed by the fact that the walls of …
30 March 2015 — Orientation correlations among rice grains, part 3: intermezzo – Binning images
The full reconstructed image resulting from the tomography experiment described in the second instalment of this series is a 1747×1751×688 stack. The voxel size is about 0.030 mm. This is far too much for the purpose of the present study, since all we are interested in is the determination …