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philippe roux
Works at ENSSAT-Lannion
Attended université de rennes1
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philippe roux

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Incredible video of   Ultra-Ever dry a superhydrophobic coating  O_o I wonder what is the resistance over time of this coating ...
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The coating lasts for about a year.
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philippe roux

Traces, singles, GPX, GPS...  - 
 
Une bonne sortie VTT sous le soleil sur les bords du léguer: 43.79 km en 2h:50mn:33s.

http://app.endomondo.com/workouts/568088421/4414567
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#astronomy   for south hemisphere observers : the  comet  #29p  is in #outburst    at 12th magnitude instead of 16!
29P S-W 1 Steps Af(rho). NEW OUTBURST. Outburst : +/- 20150711. G.R. : 20°. New Outburst. Secondary Condensation ? Dist : 04", m2 : +/- 18, 17H46 39.27 -30° 49 07.4, A. Radius : 2.07" Animation : 3x(8x120s). Outburst. A. Radius : 2.07". A. Radius : 4.8" A. Radius : 3.4" A. Radius : 2.76" ...
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#astronomy   20 years ago,  two american amateur astronomers  , Alan Hale  and Thomas Bopp, independently discovered a new comet, first named #C1995O1 , which become one of the brightest comet of the twentieth century ...
C/1995 O1 (Hale-Bopp). Orbit and Ephemeris by Central Bureau for Astronomical Telegrams · Analysis by Seiichi Yoshida. G. Rhemann image of C/1995 O1 (Hale-Bopp) exposed on. Copyright © 1997 by Gerald Rhemann (Austria). This image of comet Hale-Bopp was obtained by Rhemann on 1997 March 27.78.
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#astronomy   #C2014Q1PANSTARRS    a bright comet actually in the night-sky  but very difficult to observe . From mid-latitude observers in the  northern hemisphere,  the comet is just below #venus and #jupiter at sunset  so only few degrees above the horizon ...  condition are optimal near 0° latitude.
 
Comet PanSTARRS and a Crescent Moon
Image Credit & Copyright: Yuri Beletsky (Las Campanas Observatory, Carnegie Institution)
http://apod.nasa.gov/apod/ap150720.html

A comet has brightened quickly and unexpectedly. Discovered last year, Comet C/2014 Q1 (PanSTARRS) is expected to be visible now for a few days to the unaided eye, just after sunset, from some locations. The comet rounded the Sun on July 6 and apparently has shed quite a bit of gas and dust. Today it is now as close as it will ever get to the Earth, which is another factor in its recent great apparent brightness and the large angular extent of its tails. In the featured image taken two days ago, Comet PanSTARRS is seen sporting a short white dust tail fading to the right, and a long blue ion tail pointing away from the recently set Sun. A crescent moon dominates the image center. Tomorrow, Comet PannSTARRS will pass only 7 degrees away from a bright Jupiter, with even brighter Venus nearby. Due to its proximity to the Sun, the comet and its tails may best be seen in the sunset din with binoculars or cameras using long-duration exposures.
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Olivier Voinnet, star of plant biology, sanctioned by the CNRS " for taking serious liberties with the rules of scientific publication " !
http://www.lemonde.fr/sciences/article/2015/07/10/olivier-voinnet-star-de-la-biologie-vegetale-sanctionne-par-le-cnrs_4678980_1650684.html#xtor=RSS-3208
 
Olivier Voinnet background: now translated in English! http://www.labtimes.org/editorial/e_594.lasso
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The electric plane #eFan (Airbus prototype ) has crossed the channel ! This is as important as the first fligth of spaceX Or Virgin galactic ...
 
Airbus E-Fan 'electric plane' completes cross-Channel flight
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a big controversy in perspective ....
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#mathematics    simulation of the wave equation in a 2D square domain.
 
Wave Equation

The wave equation is a partial differential equation that describes the propagation of various types of waves.

The equation appears throughout many fields in physics, including acoustics, fluid dynamics, electromagnetism, and quantum mechanics. With some modifications, it can even describe the spread of traffic jams on busy highways!

The one-dimensional equation was first discovered by d’Alembert in 1746 as he studied how vibrations propagated through a string, and the two- and three-dimensional equations were solved soon after by Euler during his study of acoustics.

The simulations above show the propagation of a disturbance on a two-dimensional surface for two different sets of boundary conditions.
Mathematica code here (https://gist.github.com/BrianWeinstein/7c38a5040f7eb1b56b04)
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#astronomy   the Milky Way seen from my backyard last night ..   just enough to see M6  (and M7)  open clusters just few degrees above the horizon !
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Nice view 
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#astronomy   first detailed views  of #pluto   moons #nix and #hydra    by #newhorizons !
 
Closest views yet of Nix and Hydra - View larger. | Pluto moons Nix and Hydra, imaged by New Horizons spacecraft on July 14, 2015. Image via NASA / JHU-APL / SWRI. New Horizons. Here are Nix and Hydra, getting their moment of fame following the passage of the New Horizons spacecraft on July 14, 2015. I understand that there are sharper images coming. Pluto moon Nix, left was imaged by the LORRI (LOng Range Reconnaissance Imager) camera with lower resolution colour data from the RALPH imager...
Pluto has five known moons, and it's a bit surprising that New Horizons hasn't found any new ones yet. Newly released images show small moons Nix and Hydra.
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analysing script performance with #scilab profiling  functionalities :
https://help.scilab.org/doc/5.5.2/en_US/section_f8ae48740240f0c0b0770316ec9938aa.html
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philippe's Collections
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Have him in circles
25,610 people
Robert Temple's profile photo
victor lozano's profile photo
Donavin Findley's profile photo
Lee Pinnell's profile photo
Sarah Underwood's profile photo
John Hale III's profile photo
Christina Baumgartner's profile photo
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Jitendra Gupta's profile photo
Education
  • université de rennes1
    mathématiques, 1992 - 2001
  • lycée notre dame de campostal
    voie générale, 1989 - 1992
  • collège notre dame de campostal
    voie générale, 1985 - 1989
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I like to discover new things every day, learn from other persons and share my experience ... to make it short : I'm an enthusiast :-)
Introduction
I'm looking for interesting things about mathematics, astronomy, computing, outdoor sports ... do not hesitate to comment or re-share my public stream, then  I'll probably have a look to your profile and circle you if we have common centers of interest.
Bragging rights
on google+ since July 2011, survived to ten years of high-level in athletics, three years phD in mathematics and to being father of two girls! !
Work
Occupation
mathematics, astronomy, computer science, trail, mountain bike, kayak ...
Skills
mathematics, scilab programming
Employment
  • ENSSAT-Lannion
    Lecturer in Mathematics for post graduate engineering students, 2014 - present
    for post graduate engineering students in electronics, optronics and computer science
  • ENSSAT-Lannion
    Professeur agrégé Mathématiques, 2014 - present
    école publique d'ingénieurs en 'électronique, optronique et informatique
  • IUT Lannion-B.Eng. level in Computing
    Lecturer in Mathematics, 2001 - 2014
  • IUT Lannion-DUT informatique
    Professeur agrégé Mathématiques, 2001 - 2014
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