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Viewing profile — abthomson

abthomson

HN member
Joined
Fri, Jan 30, 2009, 7:58 AM UTC
HN karma
65
Public activity
19 items

About abthomson

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Recent public activity

  1. comment
    Comment #22824101

    In the upper right there's a "login with password" link. I logged in successfully using my old number there just now.

  2. comment
    Comment #14482493

    It's called Fermi estimation for a reason!

  3. comment
    Comment #6187206

    For shorter distances, time-of-flight is not typically used. There's surprisingly little documentation about how these things work online though. From http://ptd.leica-geosystems.c…

  4. comment
    Comment #4700866

    The Kwikset motorized deadbolts have tapered bolts to help compensate for poor alignment. I'm not sure why it's not more common with other locks.

  5. comment
    Comment #4264616

    Both "normal" automatic transmissions and the Prius use epicyclic gears. The main difference between the two would be that an automatic transmission in normal operation has one pow…

  6. comment
    Comment #3714187

    Very true, search for "server inlet temperature" if you want to learn more.

  7. comment
    Comment #1906381

    It's definitely not accepted that power and cooling are the dominant cost, in most cases it's the servers: From James Hamilton (who just happens to work for Amazon) http://perspect…

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    Comment #1793327

    It's not clear why the author decided to compare a ZestCash loan with credit cart debt when they're clearly different products. And while ZestCash's rates of 242% to 462% are high,…

  11. comment
    Comment #1552274

    http://thestartupdigest.com/ is useful for finding out about events like this in advance.

  12. comment
    Comment #1486698

    I don't know much about ISP DNS configurations, but the problem extends to clients as well. For example, until Java 1.6, the default TTL for DNS lookups was forever.

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    Comment #1123590

    I'm only sure because I saw a bunch of RTMP and Flex messages going to the central servers (they all have similar IP addresses) and a lot of UDP traffic going to a pretty much rand…

  16. comment
    Comment #1123529

    Yes, and this is what chatroulette does. I did a TCP dump of the traffic and the data sent to the central servers is very minimal, mostly short plain-text messages containing littl…

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    Comment #532730

    Furthermore, the flow in the two pipes is usually in opposite directions because it's more efficient that way.

  19. comment
    Comment #459147

    If a child prodigy becomes famous in later life, it's probably not because they were a child prodigy but for some other reason. One example I can think of would be http://en.wikipe…