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  1. answer on Using a Small Satellite Array as C-Band Receiver? · · Score: 3, Informative

    Is it possible to use many smaller dishes to achieve the same effect as one big dish in picking up C-band transmissions?

    Yes.

    More detail?

    Yes, do a google search on multiple antenna and radio astronomy. The math gets hairy sometimes, but it can be done. Might be more trouble than just getting a Dish Network thingy installed.

  2. Old trick on Is This The Oldest Map of North America? · · Score: 2, Interesting

    Find a very old piece of paper. Write something on it. When they date the paper, they'll think the writing on it was just as old.

    Fools some of the people some of the time...

  3. Re:Plug, plug on New Way To Grade Decay of Computer Installations · · Score: 1, Offtopic

    I just did an apt-get install cruft on my laptop, and everything was pretty clean. It did complain a lot about all those files in /mnt/windows, which I thought was pretty funny...

  4. Re:Worth it: Pascal's Gamble on Boeing Joins In Anti-Gravity Search · · Score: 2

    Under that alternate assumption, the gambit actually more strongly favors belief. At worst it essentially reduces to the original form, I think. Of course, you know what they say about the word ass-u-me.

    I once worked with a person who was formerly a Catholic monk. He knew that I didn't believe, and we had many discussions about many things including religion. His viewpoint startled me, to be honest. He said flat out that atheism didn't preculde entry to heaven, according to his understanding. My "quest for truth" as he put it would surely count for *something* in the eyes of the Catholic god.

    But anyway, the way to read these things is not to add up the numbers of possibilities one each side. In other words, it's not correct to say "there's three scenarios that lead to gain, but one that lead to loss, so pick one of the scenarios that lead to gain".

    The way to use this thing is to pick the path that leads to maximum gain. In all cases, a possible outcome is equal: infinite gain.

    I assume you're familiar with the standard "prisoneer's dilemma". In that scenario, the outcomes all have different values - 10 years vs. 5 years vs. 3 years, and so on.

    Imagine that the dilemma was posed with the outcomes all having equal values - we couldn't choose what to do.

    Example:

    If nobody talks, 0 years for both.
    If one person talks, 0 years for the talker, 10 for the one who didn't.
    If both people talk, 10 years for both.

    So, we've got the following possibilities:

    I don't talk: 0 years, or 10 years.
    I do talk: 0 years, or 10 years.

    See? That's exactly how Pascal's wager is flawed. When all courses can lead to exactly the same gain, it cannot logically be used to make a decision.

  5. Re:Worth it: Pascal's Gamble on Boeing Joins In Anti-Gravity Search · · Score: 2

    Actually, I was thinking that the wager is incomplete. The possibilities of action are only believe or don't believe, which is imcomplete.

    Belief cannot be automatically assumed. Someone who tries hard to believe might actually fail to believe. And someone who tries hard not to believe might fail in that, and wind up believing anyway.

    So accounting for that, we wind up with:

    believe infinite gain
    believe and fail infinite loss
    not believe infinite loss
    not believe and fail infinite gain

    For either course that I could pick, the possible outcomes are either infinite gain or infinite loss. That's what I mean when I say that Pascal's wager does not offer any help in deciding the proper course to take.

  6. Re:Who cares? on Probing Hash Tables? · · Score: 1

    I actually don't remember where I got the hashing algorithm from. Probably one of the books on my shelf. Maybe one day I'll sit down and take a really good look at it.

  7. Re:Worth it: Pascal's Gamble on Boeing Joins In Anti-Gravity Search · · Score: 2

    Except that the wager is flawed. It's impossible to determine any course of action from the wager.

  8. Re:When will we get a proper packaging system? on RPM Dependency Graph · · Score: 3, Interesting

    Even experienced Debian users who repeatedly try to persuade me to abandon RedHat are forced to admit that they never did get USB working, and after a while you realize that they are more in-love with the theory of debian than the reality.

    I run only Debian and I found it to be a piece of cake to get USB working.

    The problem was that once my camera was recognized, the Linux kernel didn't know what to do with it. Does that make me more in love with the theory of the Linux kernel than the reality?

  9. Re:Who cares? on Probing Hash Tables? · · Score: 2

    The hash map in STL takes a hashing function, so that doesn't let you off the hook...

    Anyway, one of the more useful hash maps that I use utilizes strings for the key. To calculate the hash of the string, I use this functor:

    struct stringhash {
    size_t operator() (const string &str) const {
    const char *s = str.c_str ();
    unsigned long h = 0;
    for ( ; *s; ++s)
    h = 5*h + *s;
    return size_t(h);
    }
    };

    Is there a more efficient way? My strings are usually short, but suppose I want to run this function on the full text of "King Lear" or something...

  10. Re:Doubt it. on DoD Dreams of Efficient Spectrum Usage · · Score: 5, Insightful

    Let me shorten that down a bit for you:

    The efficiency isn't about money, it's about efficiently destroying the enemy, weighed against the expense of our own soldier's lives.

  11. Re:Western Digital reliability on Western Digital Announces 200 Gig Drives · · Score: 2

    If you've got a high capacity server, get good stuff. I was only using my old drive because all I cared was that the drive worked. If they were slow it didn't matter on that computer.

  12. Re:How to make my mobo recognize it? on Western Digital Announces 200 Gig Drives · · Score: 2

    Probably the same reason that the AIX box at work (1 gig of ram, 18 gigs of disk space, quad processor) chokes when you try to grep a file with lines longer than 2048 characters.

    Keep ranting about stupid limits, maybe it'll do some good. At least I won't feel lonesome.

  13. Re:Western Digital reliability on Western Digital Announces 200 Gig Drives · · Score: 3, Interesting

    Funny, I'm holding one in my hand right now that I bought in 1992. It's only 1000 times smaller than the one listed here - 200 megabytes. It still works perfectly and up until a month ago it was a swap drive on one of my computers. The swap was very lightly used, but it felt GOOD dammit to be using the second hard disk I ever bought in a Linux box.

    Anyway, 1000 times increase in capacity in just 10 years. To extrapolate, that means that in the year 2012, we'll have 200 terabyte drives. Actually, it's more complicated than that.

    I paid $500 for my 200 meg drive, and these new 200 gigers are going to be selling for less than that. What it'll turn out to be is that our 200 terabyte drives will cost little more than the value of the raw materials used to build the thing.

    What WON'T change is that the handful of hard disk manufacturers around will have might thin margins and heavy competition.

  14. Re:Jeez...Drives this size are appetizing but scar on Western Digital Announces 200 Gig Drives · · Score: 2

    Use unison and two drives to synchronize the filesystems. I actually use unison with two desktop computers and a server to keep all 3 in sync! With copies of everything on 3 hard drives, I don't worry too much.

  15. Re:Wow, that is ass on All-In-One Arcade Console · · Score: 2

    You may indeed the only one. I think his cabinet looks pretty sweet. Who cares if it doesn't look like the one from the arcade exactly. When you build it yourself, you should take the liberties of making whatever design decisions you feel like.

  16. Re:ACLU is up to no good? on ACLU Files New DMCA Challenge · · Score: 2

    Agreed, I usually get suspicious whenever I hear the ACLU has gotten involved in a case. As most of the cases they tend to get involved in are the highly controversial and highly visable cases. And I rarely find myself agreeing with thier point of view.

    Some other things that are true:

    -The only military actions that happen are the ones that you hear about.
    -The only ideas that exist are the ones that you've heard about.

    The ACLU does a great deal of stuff. The only time they make the news is when something newsworthy happens. It doesn't seem like you've accounted for this.

  17. Re:first in 100 years? on New Species Found in Central Park · · Score: 1, Informative
  18. Re:There's a special boot loader, er disk overlay on Finding BIOS Upgrades? · · Score: 2

    EZ-Drive has a configuration menu that you can operate.

    You boot from the hard drive, then EZ-Drive loads, then EZ-Drive gives you a menu that you can use to boot off the floppy.

    I don't know about booting from the CD-Rom, but you are almost certainly right about booting from a zip or scsi drive. EZ-Drive is not the best software, but Linux DOES know about it and will do the right thing when it sees it.

  19. Re:There's a special boot loader, er disk overlay on Finding BIOS Upgrades? · · Score: 3, Informative

    OK, we were both wrong. It's EZ-Drive

    I found the large disk howto, and it says:

    Linux does support OnTrack Disk Manager since version 1.3.14, and EZ-
    Drive since version 1.3.29. Some more details are given below.


    And then below, it says:

    5. Kernel disk translation for IDE disks

    If the Linux kernel detects the presence of some disk manager on an
    IDE disk, it will try to remap the disk in the same way this disk
    manager would have done, so that Linux sees the same disk partitioning
    as for example DOS with OnTrack or EZ-Drive. However, NO remapping is
    done when a geometry was specified on the command line - so a
    `hd=cyls,heads,secs' command line option might well kill compatibility
    with a disk manager.

    The remapping is done by trying 4, 8, 16, 32, 64, 128, 255 heads
    (keeping H*C constant) until either C

    What that means is that if you're using Linux, you probably don't need this thing. You just put your kernel in the first part of the disk that the BIOS can see and pass the parms to the kernel on the lilo boot line.

    If you're dual booting with Windows, then you probably will need this EZ-Drive. And in that case, you do NOT want to specify the hd parameters to the kernel. The kernel knows about EZ-Drive and will do the right thing.

  20. Re:There's a special boot loader, er disk overlay on Finding BIOS Upgrades? · · Score: 2

    I used EZ-Disk (I think that's the actual name) and it worked just fine. The Lilo manual said that it was compatible, and my computer was having a lot of trouble seeing the 11.5 gig disk.

    That was a while ago though, I don't know how it would work with a larger disk.

  21. Spaghetti with meat and stuff on The Open Source Cookbook? · · Score: 2, Interesting

    1 lb spaghetti, or other pasta
    1 lb of hamburger
    1 little can of tomato paste
    about a cup of ketchup
    about a cup of spaghetti sauce
    about a half cup of water
    1 onion
    oregano
    salt and pepper

    -Chop up the onion into little pieces, or slivers, or whatever.
    -Start the spaghetti boiling in a big pot.
    -Brown the onions in a big skillet with a little butter or oil until they are cooked.
    -Add the hamburger to the skillet with the cooked onions and brown that. Salt and pepper the hamburger.
    -After the hamburger is done, add the water, oregano, tomato paste, spaghetti sauce, and ketchup. Don't skimp on the ketchup, it's the secret ingredient.
    -Simmer that a while on very low heat
    -after the pasta is done cooking, mix it up with the sauce.
    -Eat.

    It's a little tastier than the regular spaghetti sauce/hamburger and pasta combination. This recipie is open source. Feel free to modify the quantities and/or actual ingredients to suit your curiosity. If you serve it to friends and they like it, you are obligated to tell them how to make it if they ask.

  22. Recipie for "Pizza Quick" on The Open Source Cookbook? · · Score: 1

    Get the phone book. Look up a nearby pizza joint. Order. Voila! No fuss food.

  23. Re:stupid researchers on MRI Study Shows We're Wired to Cooperate · · Score: 2

    There's not enough information there to determine what the best moderation would be. In all your cases, the amount won is equal. In either case, you either win or lose. One win is a good as another, so it doesn't matter how you moderate.

    Now, if the question had been stated so that if you mod down and win the payoff is $10, but if you mod up and win the payoff is $100, then it's easy to decide which is the right decision.

  24. Re:Weather effects on Unmanned Aerial Telecom Relays · · Score: 1

    Way to think without criticizing, pal. It's not the motion of the airline jets through the air that's causing problems. It's the large amount of fuel that they burn and their contrails.

    Solar powered aircraft are not going to have any effect on the atmosphere. The person who made the boat/ocean analogy was correct.

  25. Cranks and dualists on Ask Dr. Richard Wallace, Artificial Intelligence Researcher · · Score: 2

    Why does discussion about artificial intelligence attract so many cranks who have their own wacked theory? And likewise why are there so many philosophers who have no background in mathematics, computer science, or even medicine so certain that computers can never do what a human does?