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sparky

HN member
Joined
Thu, Apr 23, 2009, 1:39 AM UTC
HN karma
1,209
Public activity
395 items

About sparky

grad student in computer architecture -- i like to dabble in a lot of things though

I can be reached at johnso(85+2)@illinois.edu, where the parenthesized expression is replaced with its result.

http://blog.mattj.me

Recent public activity

  1. comment
    Comment #13426913

    If you're earning $300k/year in California, you're paying ~$22k in state income tax, so you should be itemizing on your federal return with or without the mortgage, and subtracting…

  2. comment
    Comment #8644013

    This? http://cacm.acm.org/magazines/2010/2/69354-a-few-billion-lin... http://web.stanford.edu/~engler/BLOC-coverity.pdf

  3. comment
    Comment #8624247

    Cheapest possible toaster oven + cheap multimeter thermocouple for manual temperature control + {paste flux, solder paste+stencil} works better than you'd think for soldering BGAs.…

  4. comment
    Comment #8609350

    The only real similarity to PCIe is that they're both high-speed differential signaling standards. This article has a good overview of what is known: http://www.anandtech.com/show/…

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  6. comment
    Comment #8204994

    Yeah, I think that comment conflates three things: 1) The regulatory burden of going public (Sarbanes-Oxley compliance et al.) pushes companies to stay private, which keeps the ave…

  7. comment
    Comment #8162017

    Propagation velocity in copper is within a factor of 2 or so of c; you would have to length-match even at vp=c, given a short enough clock period.

  8. comment
    Comment #7942298

    Isn't that for a 1000x ROI? 1000%=10x, so even selling 1% on Kickstarter at a 200M valuation would yield something like that.

  9. comment
    Comment #7932700

    I think he means you get an 80k refresher every year that vests over 4 years (20k/year). After 4 years, you have a full pipeline and 4 tranches (80k/year total) vest every year.

  10. comment
    Comment #7893565

    Aliasing conflict! This is about doing histogramming on an FPGA, not a tool to group FPGA dice into speed grades :) Would be interesting to see how an FPGA stacks up against a GPU …

  11. comment
    Comment #7805218

    The lack of palletization on Target's trucks seems inefficient at the store level, but may be justifiable at the company level, since Target owns its own distribution centers: * Tr…

  12. comment
    Comment #7487514

    LLVM has an open-source PTX backend, and newer versions of the official CUDA compiler use LLVM to generate PTX internally, but PTX is a device-independent intermediate layer, and t…

  13. comment
    Comment #7439341

    They need not be destroyed[1] : Goods that are seized and forfeited as bearing a mark that is a counterfeit of a registered trademark, piratical of a registered copyright or import…

  14. comment
    Comment #7431797

    The "stereo" part likely adds significant work (up to 2x), since you're rendering from two points of view.

  15. comment
    Comment #7393619

    fifty times as much storage.

  16. comment
    Comment #7297499

    Same in Chrome 34, Ubuntu 13.10, GTX Titan, NVIDIA 331.49.

  17. comment
    Comment #7295476

    We also aren't that far off with 1TB mSATA (about 1x2 inches) drives available today. 2.5" drives are obviously much bigger than 8 microSD cards because the form factor was designe…

  18. comment
    Comment #6927589

    Yeah, the paper talks about how to vary the parameters to simulate powder, wet snow, slush, etc. These techniques were developed for the movie Frozen, and to my eye (I grew up with…

  19. comment
    Comment #6917127

    Likewise, a beep and a statement of fact on a screen ("target has been missed") is a far cry from screaming. If the work can fundamentally be measured on 15 second intervals, what …

  20. comment
    Comment #6916212

    This sounds like you're advocating a free market approach in this case, where BART employee wages should rise until their employer can no longer operate. As in other markets, the s…

  21. comment
    Comment #6915881

    What part of that is objectionable? I worked logistics at a big box retailer 10-ish years ago, and that kind of thing was completely standard. The feeling was that, yes, the beeps …

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  23. comment
    Comment #6600810

    This is great news, thanks guys! Are there really no limitations on the number of calls and text messages? I imagine many businesses and other use cases could operate indefinitely …

  24. comment
    Comment #6588550

    > other sources of itemizable expenses The interest payments in the first half of most mortgages get you close to the standard deduction. Only works for owners, but it's still a re…

  25. comment
    Comment #6423260

    Many credit unions are part of a large co-op with lots of no-fee ATMs all over the place ( http://co-opatm.org/ ). You can also deposit checks/cash at many of these ATMs. They may …