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

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Awesome video of Soyuz TMA-16M spacecraft  docking to the #ISS    The crew-members aboard the Soyuz  will spent one year in the ISS.
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So... how is Hurd coming along RMS?
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#RIP   John Nash  #ABeautifulMind  
 
Today we mourn the unfortunate loss of Nobel prize-winning mathematician John Nash and his wife Alicia. Cheers to beautiful minds and hearts. #ABeautifulMind 
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#astronomy Awesome video from Thierry Legault of a #Jupiter occultation by an Iridium flare ! From more than 20 years the Iridium satellites produce bright flashes in the night-sky. you can predict precisely these events  using websites like http://www.heavens-above.com/  or softwares , sometimes I use such data to make photos of Iridium by myself : https://plus.google.com/+philipperoux/posts/CJekj29UJzL
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computing and plotting with #scilab   a vector field normal to a surface  from a mesh of the surface ( the unit sphere  here)
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#astronomy Here is my last shot of #M98 spiral from Virgo Galaxy cluster one month ago. This galaxy is the easiest to shoot in this area thanks to the 6th magnitude star in the same field, this star help a lot to finding/focusing/guiding ! But despite this the auto-guiding wasn't optimal due to some wind .... for the northern hemisphere today's new moon is the last before summer solstice, and so  the last period for deep-sky astrophotography before 15th July.
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when I look at this gif I understand that in 0-gravity, the screw once out of its nut continues to turn on itself in a vacuum by inertia, but why its rotation axis can suddenly switch by 180 ° repeatedly ???? I guess this is a consequence of the gyroscopic effect, but I found the  explanation surprising: the  rotation axis resists to change its direction under small perturbations, but if the force is sufficient to tip it suddenly axis 180 ° change is possible since the axis is preserved!
 
Besides making Rocket Sounds, this is what Astronauts do the whole day at the ISS.
Join the Simple Science and Interesting Things Community and share interesting stuff! https://plus.google.com/communities/117518490246975838002

The ISS serves as a microgravity and space environment research laboratory in which crew members conduct experiments in biology, human biology, physics, astronomy, meteorology and other fields. The station is suited for the testing of spacecraft systems and equipment required for missions to the Moon and Mars. The ISS maintains an orbit with an altitude of between 330 and 435 km (205 and 270 mi) by means of reboost manoeuvres using the engines of the Zvezda module or visiting spacecraft. It completes 15.54 orbits per day
http://en.wikipedia.org/wiki/International_Space_Station

http://img0.joyreactor.com/pics/post/fun-gif-zero-gravity-2099273.gif
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This looks like its got an uneven precession, with some slightly off balance resonance to "kick" it into the new orientations.
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Fill the empty spaces with numbers from 1 to 9.
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Alex added information about the symbol to the post I mentioned above: https://goo.gl/7kQ9Us
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Pleiades star cluster in conjunction with the sun today! This is  visible  from the #SOHO    images  see in  #LASCOC3 coronograph page : http://sohowww.nascom.nasa.gov/data/realtime/c3/512/
22 May 2015 - Mission Day: 7112 - DOY: 142. About us. SOHO. home · about · gallery · data/archive · operations · publications · newsroom · classroom · community. DATA/ARCHIVE. Archive · Science Archive at GSFC · Science Archive at ESAC · Real time images · The Sun now · SOHO Movie Theater ...
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after computing and plotting with #scilab   the vector field normal to the unit sphere (https://goo.gl/2iyqpX) I can now draw it on all surface like a torus  here .
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#astronomy   balancing rock on #67P   !  Such rock formations occurs on Earth  (see http://goo.gl/41ItH3 ) but  is this easier   in a Earth-like gravity field  or in low-gravity  like on the comet surface  ?
 
OSIRIS discovers balancing rock on 67P!

Read more at:- http://www.mps.mpg.de/3990751/Aktuelles_2015_05_18_OSIRIS_entdeckt_Wackelstein

        (Image credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA)
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#astronomy the moon's of #pluto    are now visible by #newhorizons   spacecraft !
Ciro Villa originally shared to Space:
 
Very Cool!  Pluto's smaller moons come into view

"It’s a complete Pluto family photo – or at least a photo of the family members we’ve already met.  

For the first time, NASA’s New Horizons spacecraft has photographed Kerberos and Styx – the smallest and faintest of Pluto’s five known moons. Following the spacecraft’s detection of Pluto’s giant moon Charon in July 2013, and Pluto’s smaller moons Hydra and Nix in July 2014 and January 2015, respectively, New Horizons is now within sight of all the known members of the Pluto system.

“New Horizons is now on the threshold of discovery,” said mission science team member John Spencer, of the Southwest Research Institute in Boulder, Colorado. “If the spacecraft observes any additional moons as we get closer to Pluto, they will be worlds that no one has seen before.” "

http://www.nasa.gov/image-feature/nasa-s-new-horizons-spots-pluto-s-faintest-known-moons

Share courtesy +NASA New Horizons 

#NASA   #Space   #NewHorizons  
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Have him in circles
25,424 people
Aleksandar Ivanovski's profile photo
Paul Kreitler's profile photo
Kyle Tyndall's profile photo
Miles St. John's profile photo
David Berger's profile photo
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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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