Edgar.bonet

GEEKThis user is a self proclaimed GEEK

This user supports free software.

This user takes photographs with a Nikon DSLR

This user knows what a darkroom is and has processed photographs inside one.

This user enjoys swing dancing.

Hi! Let me introduce myself.

My name is Edgar Bonet. I am a French physicist at the Néel Institute in Grenoble, France. I’m specialized in nanomagnetism. Besides physics, I am mainly interested in:

• computer programming, especially:
  • in C, the language I am most comfortable with
  • in JavaScript, mainly to write experimental protocols (that’s right, JavaScript is not just for the Web!)
  • occasionally in C++ (with Qt), PHP or bash
• photography, including its technical aspects (optics...), analog and pinhole photography
• Lindy Hop, a social dance performed on swing music.

I have an account in the French Wikipedia since January 2008, and in the English Wikipedia since August 2010.

My contributions

I have been mainly fixing formulas and adding small pieces of data here and there, in articles related to physics and photography:

• Brillouin and Langevin functions: added continued fraction approximation of L(x), clarified the status of the various approximations of L⁻¹(x)
• Superparamagnetism: section Effect of a magnetic field rewritten and expanded, including the time dependence of the magnetization
• Quartz clock: fixed the frequency formula
• Tuning fork: fixed the frequency formula, now independent of the shape of the cross-section of the prongs
• Preferred number: fixed and expanded paragraph on ISO film speeds
• Huygens–Fresnel principle: fixed a couple of mathematical inconsistencies
• Strehl ratio: gave exact (on axis) formula, clarified that Mahajan’s formula is an approximation
• Nikon FE: added (own) pictures and more data to the infobox
• Nikon FG-20: added infobox
• Nikon FE2: expanded infobox, removed less interesting images
• Orders of magnitude (capacitance): 11 entries, mostly stray/unintended capacitances
• Orders of magnitude (luminance): created, 26 entries from 11 references
• Micromagnetics: reorganized and expanded
• Atmel AVR instruction set: added section on addressing and specified the addressing modes in the instruction list
• Serial Peripheral Interface Bus: fixed the example code for bit-banging
• Fast inverse square root: partial rewrite, making clearer that aliasing a float to an int is just a way to approximate its logarithm
• Timekeeping on Mars: simplified formulas for Mars date and time, with automatically computed current values.

Links

All these are in French:

• my user page on Wikipedia(fr)
• my personal home page, including some pinhole pictures and then some out-of-date stuff
• my pitures of the Swing events I attended
• my projects at the LOG, Grenoble’s hackerspace.

TODO list

• Cleanup and illustrate Micromagnetics.