Slashdot Mirror


User: Arkh89

Arkh89's activity in the archive.

Stories
0
Comments
262
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 262

  1. Re:Any luck... on Big Asteroid (With Its Own Moon) To Have Closest Approach With Earth Today · · Score: 1

    Nope that's clear. Although, I wouldn't expect it to crash on my house but rather I should re-phrase : is it possible to see a change in the elliptic trajectory while it is passing next to us?

  2. ... that the tidal gravitational wave of Earth/Moon will disrupt the small couple?

  3. Yeah! on Why We Should Build a Supercomputer Replica of the Human Brain · · Score: 5, Funny

    sudo cat /dev/me > /dev/you
    You are not in the sudoers file. This incident will be reported to God.

  4. Re:first on Realtime GPU Audio · · Score: 1

    GPU : Graphics Processing Unit lvl 17 evolves to Generic Processing Unit.
    (re-)Choose your specialization :
    - Audio Processing Unit (APU)
    - Stocks Processing Unit (SPU)
    - First Post Unit (FPU)

  5. Weird... on Sleep Deprivation Lowers School Achievement In Children · · Score: 2

    So at some point before graduate school it turns the other way around...

  6. Re:The Color...Ugh on Cause of LED Efficiency Droop Finally Revealed · · Score: 2
  7. Re:The Color...Ugh on Cause of LED Efficiency Droop Finally Revealed · · Score: 4, Informative

    The white led are in fact blue LEDs with a phosphor layer which "shifts" the emission spectrum towards green and red. Thus, white LEDs looks bluer or "colder" (associated with ice). The bulbs can be considered as black bodies radiators and thus have their spectrum "coming from" the red part of the spectrum (in fact most of the energy is wasted in the IR as heat dissipation). Their color are more yellowish (centered on green, 550nm) just like the Sun and seems warmer (like a camp fire). Now you can combine few color LEDs to reproduce the the D65 illuminant (Black body at 6500K, like our Sun) by balancing the amount of current in them. Other trick : you reprogram your mind to follow "correctly" Wien's displacement law : blue color is for warmer black bodies compared to yellowish and reddish black bodies (thermal emission). To make sure of that : think of a metallic part you heat up, it will start as black (as in not-emitting) then go to red, then yellowish and then bluish (but you will see it white-blue at this point). So, white LEDs should appear "warmer" when considering true physics...

  8. Re:An Infra-red laser? Why? on Navy To Deploy Lasers On Ship In 2014 · · Score: 2

    CO2 Laser technology @t 10 microns is well-known and already massively used for cutting machines in the range of 6-12KW, or even more, for the industry.

  9. Re:Another sampling of reality's infinite colours on New Camera Sensor Filter Allows Twice As Much Light · · Score: 1

    Try multispectral-imagery. Then improve to spectropolarimetry-imagery and then compressive-spectropolarimetry-imagery and then compressive-spectropolarimetry-integral-imagery and then...

  10. Again? on GNOME 3.8 Released Featuring New "Classic" Mode · · Score: 1

    Oh no! Let's fork 3.7 and make sure that no one returns to the look'n'feel of the good old 2.x.

  11. Re:correlation on USPS Discriminates Against 'Atheist' Merchandise · · Score: 1

    Oh and by the way : Germany \in Europe.

  12. Because Twitter is registered in France, thus they are liable (or at least Twitter France SAS is). http://www.societe.com/societe/twitter-france-sas-789305596.html [In french, registration numbers are the RCS and the SIRET]