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User: zippthorne

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  1. Re:So tell me on Archimedes Death Ray in San Francisco · · Score: 2, Informative


    iv) Does the intensity of the reflected light not decrease the with square of the distance.
    The reflected light does not decrease in intensity with the square of the distance from the mirror. If this were the case, there would be no hope whatsoever for the myth (or a laser pointer) to work, even in modern times. The attenuation of the reflected light from a flat mirror is only related to how much the beam disperses geometrically before it hits the target (e.g., our 1 ft square tile's reflection spread to an area of 3 square feet at a distance of 100ft, so the attenuation was a factor of 3). Low power laser pointers can project bright points over very long distances because they have a very tight, coherent beam (i.e., it does not increase in diameter with distance).


    Since it DOES decrease with the square of the distance. it is some constant times the square of the distance. That constant can be very small, but it is there nontheless. For proof, just look at the example:

    if it spread out to 3 square feet at 100' distance, what would it spread out to at 200' distance?

    low power laser pointers have a tight almost columnar beam, which can be more easily achieved because it is monochoromatic. coherence is not necessary for the tightness. Even this beam widens according to the inverse square law. (In fact, very tight beams can be achieved even with white light, using aplomatic lens designs to compensate for chromatic abberation)

    It hurt to read that part. the rest looks ok at first glance...

  2. Re:The man page is simple on Tux Can Even Milk Cows! · · Score: 1

    It is impossible to underestimate its importance as it is completely irrelevant since there is no such thing as a male cow, just as there is no such thing as a male woman. There are cows and bulls.

  3. Re:Not sure this discovery is necessary on The End Of The Light Bulb? · · Score: 1

    Not to mention that laser is just about the least efficient source of light.

  4. Re:Storage on hard drives on Bill Gates Speaks Out Against Next-Gen DVDs · · Score: 1

    No it doesn't. You take your Hard-disk library device to the video kiosk and plug it in. it automatically downloads the media choice you've selected from the kiosk's library and adds it to the media-table on the library device. then you take it home, plug it into your media playing device and watch/listen to whatever. If it fills up you buy another library device and either transfer all the files using the convenient connector or just store everythign and move on. perhaps the media player can even maintain a database of what's on what library.

  5. Re:I think you nailed it. on Why Have PDAs Failed In The iPod Era? · · Score: 1

    You forgot to add, "That's not a Nokia"

    There are still a few phones on the market that are just phones. Unfortunately, they appear to have taken their design cues from the EZ-bake oven and the "My Little pony." They're gimicky plastic thingies that may or may not work but lack the weight to be percieved as being a quality product. I'm sure plenty of market research went into it and they're designed that way on purpose.

  6. Re:My ideal car! - Your missing the point of HP. on Honda Fuel Cell Concept with Home H2 Refueling · · Score: 1

    As did I, until i thought about where my electricity comes from and how much air it heats up on its way to me. Then i realized performance boosting low-power, high efficiency vehicles was a good idea, especially in the US where performace is so important. I was just disapointed with the cost. unless gas goes up even more than it already has, it's still cheaper to just buy the similarly performing car from the same manufacturer and pay for the extra gas. and the similar performing cars are also allegedly more comfortable.

  7. Re:Sony always tries this, and never wins on Blu-Ray The Flavour of The Moment · · Score: 1

    No it wasn't. It had a similar "quality" but shorter tapes because they believed the VHS size tapes were too bulky. Some time later, the best betamax tape was better than the standard VHS tape and equivalent in time, but by then super vhs was out and roughly equivalent to beta, except in price.

    Betamax v. VHS is a lot like macintosh v. PC. There is a niche group extolling the various virtues of the more obscure, but the same group fails to notice the strengths of popular format. It's a kind of elitism, "You people are too stupid to realize the benefits of this thing instead of that crappy thing but I can see it so I'm better than you."

  8. Casual Pirates on Quake 4 Linux · · Score: 1

    There is a certain amount of social pressure to copy games for your friends. (You're making me buy this? what are you some kind of prick? c'mon it's just copying.)

    Games that are not easy to copy or are naturally averse to copying (such as those that don't allow duplicates to play on the same server) or otherwise require more effort than "insert disk, burn, give to friend" will feel less pressure.

    Frankly, it's a bit of a relief to people don't participate in the copyfest if their friends know it "can't" be copied. (obviously there are still "cracked" versions, but those can be dismissed using the spectre of malicious code)

  9. Re:Patents on CIA Investing in Modular Green Energy · · Score: 3, Insightful

    Anybody can buy transistors, IC's, resistors, capacitors and inductors, but that doesn't make your portable radio any less innovative.

  10. Re:My ideal car! - Your missing the point of HP. on Honda Fuel Cell Concept with Home H2 Refueling · · Score: 1

    You've just mentioned the whole point to hybrid cars. They're not dual powered cars. They are low-power gasoline cars with an electric performance assist. So they get mileage equivalent of the engines they have, but can perform like a 6-cyl. with only 4 or even 3 cylinders. (I believe the honda uses a 3-cyl. engine)

  11. Re:.us domain? on Senator Wants to Keep U.N. Away From the Internet · · Score: 1

    How many other nations refer to the executive office by the color of the building the executive lives in?

  12. Re:In related news on Commission Suggests UK Should End Astronaut Ban · · Score: 1

    I guess i don't get it. I think he's funny without needing to cross dress. Lesser comedians need gimicks like that, Ellen for instance. It's not like he does all that many transvestite jokes anyway.

    "We claim this land in the name of Britain"
    "What? This is India. You can't just go claiming someone else's country"
    "Well, Do you have a flag?"
    "No."
    "No flag? No country. Those are the rules"

    -paraphrased from memory.

  13. Re:In related news on Commission Suggests UK Should End Astronaut Ban · · Score: 1

    Eddie Izzard? That you? What's with the dress anyway?

  14. Re:What about the human factor? on A Clock That Runs for 10,000 Years · · Score: 1

    all clocks are astronomy simulators. They indicate where some location on earth is in relation to the sun-earth line. Clocks with calenders indicate where the sun-earth line is in relation to a particular sun-star line or relative to the componant of the earth's rotational axis that lies in the earth's orbital plane.

    How is understanding this helpful? The gregorian calander was designed to match as closely as possible these motions, since it was determined that the orbital period is not exactly 365 days. All the machinations of that calender are really just a big integer fraction representation of the fraction part.

    Leap seconds are an extension of this idea, created as a result of more precise astronomical measurements. They are not randomly placed.

  15. Henhouse, meet fox, the new guard. on Estonian Internet Voting Called a Success · · Score: 2, Insightful

    Exactly. The absolute last people who should be writing law are lawyers. Not only will they put all kinds of obscure jargon (allegedly to clarify things) but it is also an extreme conflict of interest. Lawyers make their money by serving as advocates on different sides of disputes over various laws.* They have a vested interest in increasing both the number and complexity of laws, thus justifying their existance as advocates. They have no particular interest however in writing good law. only the quantity and complexity is important.

    *also consulting as to the implications of law, but that's really just an extension of the advocate role.

    Putting lawyers in charge of writing law is like like letting politicians dictate campaign finance rules and .. oh crap.

  16. Re:Intersting. How much does it weigh? on Transparent Aluminum a Reality · · Score: 1

    The front lines are more vague however the premise is still the same. Some forces must be more mobile than others. The sacrifice is durability. A hmmv is not an APC, even if it is up-armored. For those roles, we have APCs and the bradley. When people say that we should be armoring hmmvs, I think what they really mean is that we should be buying more bradleys and fewer hmmvs. At least, when I hear that there is a shortage of armored transports, I think, "we should buy more 'Armored Personnel Carriers'" not "We should glue iron plates to jeeps"

  17. Monkeys on BBC Announces Adult Doctor Who Spin-Off · · Score: 1

    Come in barrels my friend. Everyone knows that.

  18. Re:New Business Model on ABC Affiliates Grapple With TV-Show Downloads · · Score: 1

    I would think they'd be happy to hire anyone who tries and sell this product as well as oil. They're closer to the problem: they have a better idea of how long oil will last than any of us, but it's obvious a finite resource. What company that expects to remain in business would fail to develop new resources in light of possible shortage in their current one? They're ENERGY companies, not Oil companies.

  19. Re:I'm not a transportation engineer... on China Going Up and Coming Down · · Score: 1

    Ok. I'm willing to subisdize the rails and switches in a highways & airports model. I'm not willing to subsidize a specific company and at the same time support their monopoly. Why does a train ticket from say.. florida to new england cost more than an airline ticket to same? I submit that the reason is the subsidies: they don't need passengers to stay in business. (the other possible reason, that it's actually more expensive to oparate trains than planes also leads to the conclusion that rail subsidy should be ended.) BTW, shame on the big airlines for taking a lesson from AMTRAK instead of Southwest.

  20. Intersting. How much does it weigh? on Transparent Aluminum a Reality · · Score: 1

    If it weighs as much as conventional "level I" armor, it's going to slow down the hmmmvs. At which point, a new fast unarmored jeep-like vehicle will be needed to fill certain roles. When the public finds out they'll want to armor the new vehicle, ad infinitum.

    Some Hmmvs should be armored. All of them is rediculous.

  21. Re:I'm not a transportation engineer... on China Going Up and Coming Down · · Score: 1

    you forgot E) they have discovered a business plan that does not actually require that they make a profit. The shortfall is made up by begging off the american taxpayer.

  22. Re:New Business Model on ABC Affiliates Grapple With TV-Show Downloads · · Score: 1

    Make, dig up, or whatever and sell something better. What's stopping you from tapping this huge market?

  23. Re:$5500 ??? on Mark Newport's Knitted Heroes · · Score: 1

    Seriously. This is getting up into the order of magnitude of the real batman costumes from the movies.

  24. Re:My cold, dead hands on The exhaustion of IPv4 address space · · Score: 1

    why does it have all those funny characters? couldn't they increase the size by simply making the addresses longer?

    just extend your shirt to 127.0.0.0.0.0.0.1 etc?

    what is the benefit of the new nomenclature and why is it superior to the previous one, especially as every address is just a xnumberofbits integer anyway.

  25. Re:The iPod is a music player *first* on Video iPod Apple's First Bad Move? · · Score: 1

    battery time. It loses battery time. color screens take up a huge amount of power compared to simple lcd screens. and they aren't visible under all lighting conditions. an LCD with optional backlight is a very lower power option compared to whatever it is the color screens are using.