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User: zer0vector

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  1. Re:Tapes too... on Mailing Disks is Faster than Uploading Data · · Score: 1

    I remember stories about the Very Large Array, back when it was just starting up. They stored all their data on huge magnetic spools. Each day a truck would drive back to Socorro loaded with them, and it was said nothing had more bandwidth than the truck.

  2. Re:Teeth? on Print Yourself a Femur · · Score: 2, Insightful

    I doubt this would work well with teeth, since by design the "printed" bones are only temporary, intended to be replaced by real, growing bone. Teeth don't grow like other types of bones, so this would most likely not work.

  3. Universe scale model on Largest Scale Model of the Solar System · · Score: 2, Insightful

    Even better, we should build a model of the Milky Way:

    If the Earth is the size of a pea in New York, then the Sun is a beachball 50m away, Pluto is 4km away, and the next nearest star is in Tokyo. Now shrink Pluto's orbit into a coffee cup, then our Milky Way Galaxy fills North America.

  4. Re:Zion... on Matrix Gets Egyptian Ban For Explicit Religion · · Score: 2, Interesting

    That would imply the Bible was factual, which it may or may not be.

  5. Re:Real lab replica on The Hulk and Gammasphere · · Score: 1

    As another example, the crew that set up the VLA control room for the movie Contact did an excellent job. They were even allowed to borrow some of the actual pictures, stickers, etc. that adorn the true control room's walls, and use them in the movie. It's nice to see a hint of reality in a movie like that, even if it is just the set.

  6. Re:I find this highly suspect... on Making Change · · Score: 1

    I think the author assumed initially all values of change between 0 and 99 cents were equally likely, so differences in tax and price distribution wouldn't make a difference. However, I wonder if that assumption is necessarily valid, considering a vast majority of items are priced $XX.99 or $XX.95. Even with differences in sales taxes, these items would lead to a skew in the distribution toward smaller change values.

  7. Re:Looking at the tools... on Jill Tarter and the Allen Telescope Array · · Score: 3, Informative

    Each measure is important in its own way. Large baselines give you greater resolution, or the ability to distinguish between objects that are very close together. Collecting area gives you greater sensitivity, or the ability to image fainter and farther objects. These apply to all wavelengths, from the radio up through x-ray.

  8. Re:Han Solo's great achievement on Jill Tarter and the Allen Telescope Array · · Score: 1

    In most studies of general relativity, which would apply when traveling near the speed of light, the speed of light is given the dimensionless value of c=1. Thus any measurement of distance is a measurement of time. Twelve parsecs of time is the time it takes light to travel twelve parsecs, or about 39 years.

  9. So? on Gas Clouds As Giant Telescopes · · Score: 0, Offtopic

    Gravitational lenses have been known about for a long time, and studied in detail. Theoretically any object has a gravitational field and can therefore curve light around it, acting as a lens. Most of the lenses studied up to now have been galaxies lensing distant quasars, but a sufficiently massive dust cloud would produce the same effect.

  10. Re:Jupiter and/or Saturn on Hubble Captures a Protoplanetary Disk · · Score: 3, Informative

    I'm having a little trouble understanding your question, but I think what you're asking is "Would a massive companion body, be it a star or planet, aid in the formation of inner planets?" The answer to that is: kind of. They don't necessarily aid in the formation, but a large body would have the tendency to deflect smaller bodies, thus clearing the areas close to the star of debris. In our case this obviously helped with the formation of life. If the geometry or timeline changed a bit, however, it can be easy to see how a massive companion could inhibit the formation of smaller bodies. Assuming Jupiter was a bit closer to the sun, and was around before any largish planetesimals formed, it's gravity would tend to disperse the planet-forming materials, and lead to a system without close-in rocky planets. So it could really go either way, depending on the timeline you choose.

  11. Re:Kinda presumptuous physics on Resolving Beachballs in the Crab Nebula · · Score: 3, Informative

    I think you might have to look to Occam's Razor on this one. Getting a spinning neutron star isn't very "hard". A asymmetric collapse of a white dwarf does just fine. As well there are mounds of experimental evidence to support a spinning neutron stars. Other interpretations are much more "difficult" to produce, and require vast amounts of energy and extremely strict circumstances for them to occur.

  12. Re:Kinda presumptuous physics on Resolving Beachballs in the Crab Nebula · · Score: 3, Informative

    You have to understand they are assuming already that this object is a pulsar, which means the pulses are very likely powered by a rapidly spinning neutron star. The energy is emitted constantly but is tightly beamed, so the rotation of the object causes the pulsing. For an object to pulse that fast and to not be spinning faster than the speed of light, the size must be less than the beachball.

  13. Re:My Apple //e still works. on Technologies that Have Exceeded Their Expectations? · · Score: 1

    Holy crap, Lemonade Stand! I haven't thought about that game in 15 years. I so have to dig all my old Apple II stuff out of my garage just to play it. There goes my evening.

  14. Re:Just what I need! on Build Your Own Snow Gun · · Score: 3, Funny

    I think a better answer is: "I've already got 12 inches of snow on the ground you insensitive clod!"

  15. Re:huh? on First Cosmological Results From MAP · · Score: 1

    Your dark matter definition is a bit too specific. Dark matter is simply matter whose existence can be inferred using gravitational means, but it doesn't necessarily have to be made up of something other than baryons or leptons. A cloud of dark matter could be a simple cloud of ordinary dust and gas which is not being illuminated in such a way that it is detectable to us (ie not near a star or other source of energy).

  16. Waste of time on Build Your Own LCD Bus Schedule · · Score: 1

    Being a bus driver, I have to comment that this is a meaningless invention, displaying again the ignorance of bus riders. Bus schedules are clearly posted in almost all cases, and if you're too lazy to read you can usually just ask the bus driver what their schedule is. 95% of people who ride my bus do it between two stops, to work or class in the morning, and then back home at night. This requires the memorizing of a grand total of 2 times. If this is so difficult that you have have a need for the LCD bus schedule, maybe you should just stay home.

  17. No Ballast? on Personal Submarine Cruises SF Bay · · Score: 5, Interesting

    If the submarine doesn't use ballast to maintain its depth, it must always be in motion to stay at a depth away from equilibrium. Assuming it is positively bouyant (it floats) the motion of the water over its dive planes would be the only force holding it underwater. This seems a bit limited to me, since you'd never be able to stop and enjoy the view underwater. It's probably because I'd be more interested in the stuff sitting on the bottom of the ocean, rather than the things moving through it, which appears to be the point of the sub.

  18. Re:Lots of brown dwarfs? on Brown Dwarf Companion to Epsilon Indi · · Score: 1

    I know the previous post was a joke, but I wanted to point out a flaw in logic. If it is identical to earth in mass and orbital period, than the mass of the "brown dwarf" would have to be the mass of the sun. So therefore it wouldn't be a brown dwarf at all, but rather a star.

  19. Re:Physics Financial on The Top Ten Physics Highlights of 2002 · · Score: 1

    Top quark could not be reached for comment.

  20. Re:for my PhD... on Success Despite College Rejection · · Score: 2, Insightful

    Being an undergrad applying now for grad schools, the best advice I've gotten is "Don't go somewhere because its a 'good' school, go there because they do what you're interested in". If those to things coincide thats great, but being miserable for a couple of years is not worth the price of a nice school name on your PhD.

  21. Re:Involuntary BLOOD SAMPLE on Going Through the Garbage · · Score: 1

    They proved it was hers by DNA testing, but the parent here makes an incredibly good point. How do they prove that the trash is actually yours in other situations? Under normal circumstances, the police have a search warrant issued for a place and specific(-ish) items, and either witnesses see it taken from the location, or it is documented by pictures, etc. The only way the police could maintain the usefulness of the evidence would be to document every step by some trusted method, ie videotaping, from the moment they take it from your curb to the moment it is secured in an evidence room. It might get suspicious when there are video crews on your front lawn every week.

  22. Re:The real question is on Lab-Grown Steak · · Score: 1

    The real problem is then going to be what to do with the hundreds of thousands of farm animals left over. If Mr. Joe Rancher goes out of business because the lab-grown steak is cheaper and tastier, he isn't going to keep feeding his two thousand head of cattle until they die of natural causes.

  23. A Beowulf cluster of these... on PC in a.... Sphere? · · Score: 1

    Would probably resemble a gigantic game of pool.

  24. Re:That's a nice-looking amp... on 802.11 RF Amp · · Score: 1

    Eleven. Exactly. One louder.

  25. Not so big on Ultimate Webcam: Rent Time On A CCD Telescope · · Score: 4, Interesting

    If the only telescopes he has are the ones in the picture there, its not much to write home about. The largest looked like about 8 inch aperture. I understand this is probably more aperture than alot of people have (I have a paltry 4.5), but then I always thought the fun of astrophotography was going out and spending all night up taking your own pictures. Braving the cold for 10 hours sure can be rewarding when you get your finished product.