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User: Arkh89

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Comments · 262

  1. Re:I beg to differ on TechCrunch and Others On the Microsoft Surface Pro 3 · · Score: 4, Insightful

    I beg to differ too. For the same (top of the line) price you can get a laptop with a Core I7, 16GB of RAM (if not 32GB), 1TB HDD + MSATA SSD (expandable to a RAID0) and a REAL DEDICATED GPU.

    Where is the advantage in having a tablet if they are just leaving it on their desks?

  2. Re: Can they make a 3D shade? on NASA's Plan To Block Light From Distant Stars To Find 'Earth 2.0' · · Score: 4, Informative

    Mod parent up, and see Detection of Earth-like planets around nearby stars using a petal-shaped occulter (probably pay-walled), or Starshades (simple explanation) for further details.

  3. Re:It doesn't look that different on KDE Ships First Beta of Next Generation Plasma Workspace · · Score: 1

    Not sure if limited only to Open Source Desktop Environment...

  4. Either... on Woods Hole Oceanographic Institution Loses Deep Sea Vehicle · · Score: 1

    Put 1090 atmospheres or add 1125 Kg/cm^2... Not everyone is using an archaic unit system. Actually, only very few are...
    Thank you,

  5. Re:Fucking fucking fucking fucking shitbags on Firefox 29: Redesign · · Score: 0

    Right click -> "View Page Source" or "View Selection Source"
    (in FF for at least 5 years)

    You ARE a *RETARD*.

  6. Re:Uninstall Flash! on New Zero-Day Flash Bug Affects Windows, OS X, and Linux Computers · · Score: 2

    If your bank is pushing the use of Flash, you *SERIOUSLY* need to consider changing from establishment.

  7. Re:tabs on the side on Firefox 29: Redesign · · Score: 1

    Group your tabs, CTRL+SHIFT+E.

  8. Re:did you checked the video? on Firefox 29: Redesign · · Score: 2, Insightful

    Tabs On Top -- No thanks, I want my tabs below the URL bar, where God intended them to be.

    That's because you are not using your brain. It makes strictly NO SENSE to have the address bar on top of the tab bar. For each tab in the bar, I expect the info of the particular page to be WITHIN the tab not somewhere else (like, on top).

    And, on a side note, I hate the fact that the searches are common to all tab on the same basis as previously.

  9. Re:Express elevators on "Going Up" At 45 Mph: Hitachi To Deliver World's Fastest Elevator · · Score: 1

    ...dying *crushed* together.

    FTFY

  10. Re:Express elevators on "Going Up" At 45 Mph: Hitachi To Deliver World's Fastest Elevator · · Score: 1

    True!

    Still a bad-ass acceleration though...

  11. Re:Express elevators on "Going Up" At 45 Mph: Hitachi To Deliver World's Fastest Elevator · · Score: 1

    Some trouble with the 'Reply To This' function, I see...

  12. Re:Express elevators on "Going Up" At 45 Mph: Hitachi To Deliver World's Fastest Elevator · · Score: 3, Interesting

    For a 3m floor height, I find about 27.5G, at least.

    45mph => 20.12 m.s^-1

    a t_m = 20.12 m.s^-1
    a t_m^2 = (3m / 2) (max acceleration obtained at half the floor height).

    => a = 20.12^2 / (3 / 2) \approx 270 m.s^-2 / or 27.5 earth G (G = 9.8 m.s^-2)

    Where the limit of the human body for such vertical acceleration seems to be between 2,3G and 5G, depending if you are going up or down... but I haven't tested that myself).

    Ok, back to work now...

  13. Re:Still hoping they make a movie camera on Lytro Illum Light-Field Camera Lets You Refocus Pictures Later · · Score: 1

    Don't get me wrong, I agree on the effect you are mentioning ("forced blur"). The effect I am talking about really bothers me (as you don't feel the re-focus on object which are clearly at a different distance because of the different stereoscopic separation).

    You are probably right as the first might be worse than the last. I am just saying that stereo 3D (with a fixed field, as a cinema screen or a TV) is not able to render a good illusion of a real 3D world.

  14. Re:Still hoping they make a movie camera on Lytro Illum Light-Field Camera Lets You Refocus Pictures Later · · Score: 1

    Let the 3D provide the depth, and let the viewer selectively focus.

    Selectively focus on? On the screen of the theater???
    Everything will be in-focus at the same time, which would contradict the stereo depth... Thus, the brain would also get dizzy...
    No solution here, dump stereo 3D...

  15. Re:Well. on How Apple's Billion Dollar Sapphire Bet Will Pay Off · · Score: 1

    Should have been :
    Harder,
    Better,
    Faster,
    Sronger

    tutututut...

  16. Re:Point and shoot on Lytro Illum Light-Field Camera Lets You Refocus Pictures Later · · Score: 1

    Yeah but now you are at f/8, not f/2 anymore. So you lose a great deal of energy (interesting for low light scenes).

  17. Re:That wouldn't work on Google's New Camera App Simulates Shallow Depth of Field · · Score: 1

    Re-read your original comment and find the missing "for a given [...] field".

  18. Re:Overcoming hardware limitations with software on Google's New Camera App Simulates Shallow Depth of Field · · Score: 1

    The claims. The previous claims are only about optics. I am not talking about the content of the article (yet)...
    I feel sad for you now...

  19. Re:Overcoming hardware limitations with software on Google's New Camera App Simulates Shallow Depth of Field · · Score: 1

    This is not about photography. This is about Optics.
    All cameras are different. And If you think that the camera types you would use, with their sensor size norms, aperture norms, quality norms, are the only one in the world : you are wrong.

     

  20. Re:That wouldn't work on Google's New Camera App Simulates Shallow Depth of Field · · Score: 0

    The smaller the sensor size, the shallower the depth of field for a given focal ratio.

    Hahahaha, but no.

  21. Re:Overcoming hardware limitations with software on Google's New Camera App Simulates Shallow Depth of Field · · Score: 2

    DoF has no link to FoV. Hence, having an APS-C or Full-Frame sensor does not change the DoF. It just barely changes your "feeling" of it, because of the larger FoV.

  22. Re:Better idea: Improve cell phone camera lenses. on Google's New Camera App Simulates Shallow Depth of Field · · Score: 1

    And you know why it will never exists? Because the shallowness of the DoF is determined by the diameter of the aperture AND you cannot simply put a diameter larger than a few mm on these devices. This compared to the 30mm~70mm entrance aperture of the objectives on current DSLRs.

    That's why they are trying the computational way...

  23. Re:Ex nihilo nihil fit on Mathematical Proof That the Cosmos Could Have Formed Spontaneously From Nothing · · Score: 1

    That's why I prefer the Mathematical "nothing" : the empty set has all properties.

  24. Re:The image formation process is still the same on How To Build a Quantum Telescope · · Score: 1

    No problem. I know how difficult it is to "bridge" the multiple scientific domains required for today's projects.

  25. Re:The image formation process is still the same on How To Build a Quantum Telescope · · Score: 1

    The thing that's the self-convolution of the pupil function is the point spread function (g(theta) in my example from a few posts back).

    Wrong. The Point Spread Function (in the case of incoherent imaging) is the magnitude squared of the Fourier Transform of the pupil function.

    You can read : Born & Wolf, Principle of Optics, Chapter 8, Section 5 : "Fraunhofer Diffraction at apertures of various forms" (see here, starting p436).

    For the case of an ideal, top-hat shaped pupil function, the point spread function will fall to zero, and stay zero, at theta = 2*theta_pupil.

    Wrong. In that case, the PSF will be similar to the Airy pattern (circular aperture) or a Cardinal Sine function (square/rectangular aperture). Both have unlimited support (see previous book reference).

    And the Fourier transform of a function with limited support has unlimited support in Fourier space.

    Right. And the Fourier transform of a function with an unlimited support in the direct space has a limited support in Fourier space.

    Hence, while the optical transfer function will never fall to zero in this case (or any other case with a sharp edge to the pupil function), except for occasional zero crossings.

    Wrong. The PSF has unlimited support, thus the OTF (and MTF) has limited support.