NIST Fundamental Physical Constants
Ioffe Institute - New Semiconductor Materials. Characteristics and Properties
Refractive Index Database
Luxpop - Index of refraction and photonics calculations
Chercheur à l’IEMN (Institut d’Electronique de Microélectronique et de Nanotechnologie),
enseignant à Polytech Lille dans le département Matériaux.
Articles les plus récents
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Materials Properties
28 mars 2013, par Vincent MAGNIN -
Slow Science
28 mars 2013, par Vincent MAGNINTHE SLOW SCIENCE MANIFESTO
http://www.rtbf.be/info/opinions/detail_desexcellents-mais-pas-debiles?id=7852840 -
Test Driven Development
27 mars 2013, par Vincent MAGNINTDD is appropriate for scientific computing because a computing program is generally composed of a lot of functions whose returned values are well defined and can be easily tested. Write a unit test. Be sure that it fails (because you have not yet written the function !). Write the simplest function that can pass the test. Refactor the code (improve the design of the code without changing its behaviour). Go to 1.
Comments If a test fails, there is a bug (in the code or in the test !) If (...) -
Diffusion-limited aggregation (DLA)
27 mars 2013, par Vincent MAGNINObtained with a Java program.
http://en.wikipedia.org/wiki/Diffusion-limited_aggregation
http://fr.wikipedia.org/wiki/Dendrite_%28fractale%29 -
Julia Set
27 mars 2013, par Vincent MAGNINObtained with the recurrence relation , being a point in the complex plan. Here .
The Fortran source code is avalaible in the examples of the gtk-fortran project.
For more informations : http://en.wikipedia.org/wiki/Julia_set -
Mandelbrot Set
24 mars 2013, par Vincent MAGNINObtained with the recurrence relation and
The Fortran source code is avalaible in the examples of the gtk-fortran project.
For more informations : http://en.wikipedia.org/wiki/Mandelbrot_set -
GNU Fortran compiler (gfortran)
21 mars 2013, par Vincent MAGNINThe gfortran compiler is part of GCC (GNU Compiler Collection).
Documentation http://gcc.gnu.org/onlinedocs/ http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html http://www.cs.utah.edu/dept/old/texinfo/as/gprof.html
Compiler options To compile a project : gfortran file1.f90 file2.f90 To print all warnings : gfortran -Wall -Wextra file1.f90 file2.f90 To optimize speed : gfortran -O3 -march=native file1.f90 file2.f90 To optimize size (can sometimes optimize speed if program+data are a (...) -
SSD boot problem
2 mars 2013, par Vincent MAGNINCrucial M4 After an unexpected power loss, my PC wasn’t able to boot. Just "A2" printed in the corner of the screen. Impossible to go into the BIOS. The problem came from the Crucial M4 SSD drive (with a Windows 7 system), which do not like power losses.
A solution that worked : I plugged it via an USB deck on a Windows 7 PC, and check and repair the two partitions of the SSD. Then I put it back in the first PC, went into the BIOS and reselect this drive as first drive for booting. And my (...) -
Regular expressions for editing modern Fortran code
26 février 2013, par Vincent MAGNINComments : ^[\s]* !.*$ Trailing blanks : [ ]+$ Modernizing code : replacing double precision real values ([0-9]+[\.][0-9]+)d0 by \1_wp where wp is the working precision (wp=>real64), then replacing ([0-9]+)d0 by \1.0_wp
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Matériel informatique
9 février 2013, par Vincent MAGNINClaviers mécaniques
[http://forum.hardware.fr/hfr/HardwarePeripheriques/Clavier-Souris/clavier-mecanique-azerty-sujet_6902_1.htm]
[http://www.presence-pc.com/tests/clavier-mecanique-23379/2/]
Cherry sound switch comparison
[http://www.lesnumeriques.com/legrandforum/avis/Informatique/peripherique-de-saisie/mecaniques-claviers-unique-sujet_2285_1.htm]
