HNHacker News
TopNewBestAskShowJobs

cju

407 karma · joined January 31, 2013

Automotive embedded software developer from France.
submissionscomments
cju··on Ask HN: How do you name your servers?
A quote is missing in your URL. https://simple.wikipedia.org/wiki/List_of_Saturn%27s_moons is correct.
cju··on Ask HN: How do you name your servers?
Did you used original French names (Tintin, Milou, Haddock, Tournesol, Dupont & Dupond) or English ones (Tintin, Snowy, Haddock, Calculus, Thomson & Thompson)?
cju··on The Business of Phish
A nice (and shorter) article from Marco Arment on Phish: http://www.marco.org/2011/05/26/geek-intro-to-phish
cju··on Ask HN: What's the best technical talk you've heard?
The Macronomicon by Michael Fogus http://blip.tv/clojure/michael-fogus-the-macronomicon-597023...
cju··on Tesla Supercharger
Doesn't this hight power risk to lower the lifespan of the battery ?

I heard that for this reason Renault plans to ask for a small extra fee each time a customer charges the leased battery at the maximum power (that seems to be 43kW for 90kW in Testa supercharger, 22kW being the nominal fast charge)

cju··on My Code made it to a Hollywood Movie
That's a strange contrast with the ridiculously precise progress bar. Probably not the choices of the same person.
cju··on Ask HN: Did you have Lasik eye surgery?
There was a nice summing-up by Bemmu Sepponen a month ago: https://news.ycombinator.com/item?id=5218268.

See also this older thread: https://news.ycombinator.com/item?id=1970554.

cju··on Lessons Learned Developing Software for Space Vehicles
Here are some papers about software/µP in space for those who want more examples/details:

* Space Software Validation using Abstract Interpretation (2009)

http://www.di.ens.fr/~rival/dasia09.pdf

From the conclusion: This study has shown that embedded space software are difficult to analyze due to non linearity (mainly in quaternion computations) and complex control command algorithms involved (e.g., Kalman filter).

It should be noticed that the software architecture which suits static analysis by abstract interpretat ion best is also the more readable one and maintainable one. This technique can thus be a metrics of good architectures. In spite of these difficulties, abstract interpretation techniques can greatly improve the quality of space embedded software.

* Qualification of the Atomated Transfer Vehicule (ATV) Flight Control

ftp://ftp.elet.polimi.it/outgoing/Marco.Lovera/ESAGNC08/S01/01_Clerc.pdf

A lot of information about the test process, the usage of Hadware-In-the-Loop and Monte Carlo testing.

* Requirements review, Needs for launchers, space vehicles & orbital infrastructures (2006)

http://microelectronics.esa.int/conferences/ngmp2006/D2-1200...

High-level requirements for On-Board Computer (OBC).

cju··on Lessons Learned Developing Software for Space Vehicles
In a launcher, the hardware only needs energy during a short pediod of time, a few hours at most.

In the case of station, satellite or probe, solar panels are generally enough.

cju··on Linux Kernel 3.2.41 Released
3.2 branch is "8th long-term stable release from March 2012 to 2015, used in Ubuntu 12.04 LTS, Debian 7 Wheezy and Slackware 14.0" (http://en.wikipedia.org/wiki/Linux_kernel#Maintenance).

Not "current stable" but still stable and maintained.

cju··on PAWK - A Python line processor (like AWK)
A similar recipe: http://code.activestate.com/recipes/577962-awk-like-module/
cju··on Show HN: Increase your productivity with ambient noise
In a similar style Fujiya & Miyagi is great.
cju··on SpaceX software engineers are hosting a Reddit AMA tomorrow at 10AM PT.
Here is the link: "We are SpaceX Software Engineers - We Launch Rockets into Space - AMA", http://www.reddit.com/r/IAmA/comments/1853ap/we_are_spacex_s...
← PreviousPage 3 of 3