Domain: scientificamerican.com
Stories and comments across the archive that link to scientificamerican.com.
Comments · 1,496
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Re:For the love of all that's good and holy
Not that I agree with LA county on this one, but I think you are assuming that human slavery has been eradicated. It has not. Not even in the U.S.
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Re:50 million Americans CAN be wrong
This article on scientific american says 45% of Americans believe in young earth creationism.
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Re:And another thingWell maybe, or maybe not. From Parallel Universes
Space could be finite if it has a convex curvature or an unusual topology (that is, interconnectedness). A spherical, doughnut-shaped or pretzel-shaped universe would have a limited volume and no edges. The cosmic microwave background radiation allows sensitive tests of such scenarios [see "Is Space Finite?" by Jean-Pierre Luminet, Glenn D. Starkman and Jeffrey R. Weeks; Scientific American, April 1999]. So far, however, the evidence is against them. Infinite models fit the data, and strong limits have been placed on the alternatives.
Personally, I prefer to think that this universe may not be infinite, but an infinite number of the infinitely many parallel universes are! -
Re:And another thingWell maybe, or maybe not. From Parallel Universes
Space could be finite if it has a convex curvature or an unusual topology (that is, interconnectedness). A spherical, doughnut-shaped or pretzel-shaped universe would have a limited volume and no edges. The cosmic microwave background radiation allows sensitive tests of such scenarios [see "Is Space Finite?" by Jean-Pierre Luminet, Glenn D. Starkman and Jeffrey R. Weeks; Scientific American, April 1999]. So far, however, the evidence is against them. Infinite models fit the data, and strong limits have been placed on the alternatives.
Personally, I prefer to think that this universe may not be infinite, but an infinite number of the infinitely many parallel universes are! -
Here is an Unbroken Link
The story at Scientific American can be reached from this link.
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Re:URL extincted
This is a working link to the article.
JP
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The Semantic Web
Well, I won't say for sure, but I think there is a strong chance that the same man largely responsible for the last ten years could play a role in the evolution over the next ten years as well...
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Re:This seems impossible!
They found 'Gladiator' only a few decades ago.
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Spiders replace Kevlar
Article Link Here
It says that Yet pound for pound, the sturdiest spider silks are stronger than steel and stretchier than nylon.
I heard that while back the Army made a vest out of Spider Silk rather than Kevlar and it was able to stop even small rifle bullets O_o.
This could be very revolutionary. I wonder how it compares to silk? -
IN SOVIET RUSSIA
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Who owns it?
If the DOE is sinking money into funding this project then do they own the subsequent life form? Does J. Craig Venter get to patent its genes and control who does and does not use it. They say that they are planning to hobble it so that it can't leave the lav without their assistance.
I realize that this may sound farfetched (this is a single-celled lifeform). But, what legal precident does this establish with regards to ownership. If they argue "we made it we own it," what does that mean for clones?
Ownership of genes is already a big issue (they can patent you see here)
So that having been said I'm glad to hear J Craig mention "eithics" but I'm still not sutre that I trust him, the DOE or this project. -
Re:H.4 Timepiece -- ERRORSFirst of all, your references pertain only to the 1st version, NOT to the 2nd (or 3rd or 4th). To really determine the significance of this, one needs to look at better sources. See:
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Augmented Reality
Couple with some technology like this we could have some seriously effective soldiers. Not that we don't already...
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Re:You know, It always puzzled me.Technology available a decade ago would allow at least a tenfold increase in the harvestable land area of the world.
Perhaps you ought to turn off your AM talk radio and read this article written by someone who actually knows something about the topic.
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Not the first TimeOf course, when you look at the sources of the articvle, many questions pop up: Is this the first time? I suggest that no, it isn't. Simply stating the obvious doesn't do anybody any good.
If you take the article as a whole, there are some interesting points made. But beyond that recognition, what is the overall affect? I have to say that the evidence points to nothing. I mean, what are we trying for here? A null hypothesis.
Take a look at these links for a more "balanced" viewpoint on the issue.
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Re:The Previously Mentioned Method
Interesting.
I guess the gas method took quite a few years to do, but progress was fairly consistent. They got light town to airplane speed, race car speed, bicycle speed, and then stopped it altogether.
Here's a link to the Bottomquark writeup on it, and here's the article itself.
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Re:when.. who.. what
Actually this has already been implemented. This article at Scentific American Magazine from the November 2001 issue describes in detail where the technology is and how it is currently being used. P.S. I know that it is an IP address, but that is what Scientific american sends you to. If you want goto Scientific American's homepage and search for electronic paper. The first result is the article linked to above.
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Re:We've been doing it for years...
How you got +5 Insightful is beyond me, at least in the context of the original discussion. What a waste of mod points. You ought to be slapped down to -1 Offtopic.
Apparently very few people chose to read any of the linked articles, evidenced by Chicken Little here crying about the more pressing problems of the modern age. I'll agree with you that couples attempting to have a child by cloning is "silly", but the need to reproduce is a biological imperative hard-wired into our brains. As a species, our reproductive priorities probably fall in the loose order of:
immaculate(God)
natural(you and me baby)
invitro(you, me OR someone else, and a test tube)
cloning(me, possibly you or someone else - but not neccesarily, and a test tube)
adoption(maybe you, maybe me, maybe neither of us)
Folks, the article is about therapeutic cloning, not reproductive cloning. You can get off your soapboxes and stop warning us about the End of Man. Read the Scientific American article before you start clucking, OK?
In a nutshell, for those of you who are too mired in ignorance/sensationalism:
At our current stage of tech, a mature female egg can be stripped of it's nucleus, and a donor cell (skin in this case) is implanted itno the egg. This "embryo/zygote" is then encouraged to divide. Alternatively, they managed to get a mature female egg to divide without the introductionof any foreign material at all. (Guys, we are no longer needed ;)
The point behind all this was not to implant these embryos into a uterus and bring to term. The point is to supply stem cells, for therapy of autoimmune diseases and spinal injuries.
My spine cells, used to create more of my spine cells, to be re-introduced into my damaged spine, to grow an undamaged spine.
I don't see an army of cloned soldiers or designer babies here. Now move along. -
Re:Chess/brain study
If I'm not mistaken, the study shows that the Granmaster "remembers" while the newbie "analyzes". As the newbie evolves as a chess player, he will gradually start remebering more than he analyses. Or were you refering to a different study than this one?
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Re:The best of both worldsActually I don't know that this is necessarily the case after all the electron gun in conventional CRT's hits only certian spots on the screen and those aren't one-per-pixel. The holes are likely so numerous and close together that it would take several "holes" to make up any one pixel. Of course, I'm talking out of my ass since this "article" was so thin on details that you could roll it up and push it through one of said holes.
Another advantage of LCDs though is their (potential) ability to use a digital, rather than analog, interface to the graphics card.
I believe that I heard about this technology in SciAm a few years ago. I'm really looking forward to smaller CRT's. LCD displays have come along way, but I personally still wouldn't buy one, and I generally recommend against them to people buying computers. To my mind, it's still hard to beat my ViewSonic PF790 flat CRT for size and clarity - I just wish the damn thing didn't weigh 60 lbs, and didn't take up most of my desk!
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Re:It has to be said, and said early on...
Imagine a Beowulf cluster of these!
Less funny than you think. Appropriately one of the first Beowulf clusters was called the Stone Soupercomputer. Not that they built it out of stone; it was named after the parable of the Stone Soup.
There's an article about it in this month's Scientific American.
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Re:What Is Wrong With UDDI Right Now
Well, at least the standardization part is addressed by the Semantic Web stuff, currently advocated by Tim Berners-Lee, the "inventor" of the WWW and current Director of the W3C. An article was posted on Slashdot on April 11 about it that addresses this very issue. A Personal Web Page at the University of Maryland shows off some of the latest advances in this direction.
The Semantic Web is a vision: the idea of having data on the Web defined and linked in a way that it can be used by machines not just for display purposes, but for automation, integration and reuse of data across various applications. In order to make this vision a reality for the Web, supporting standards, technologies and policies must be designed to enable machines to make more sense of the Web, with the result of making the Web more useful for humans. Facilities and technologies to put machine-understandable data on the Web are rapidly becoming a high priority for many communities. For the Web to scale, programs must be able to share and process data even when these programs have been designed totally independently. The Web can reach its full potential only if it becomes a place where data can be shared and processed by automated tools as well as by people.This is from the Semantic Web Activity Statement. It seems to be a set of technologies aiming to address the service discovery problem more generally than UDDI.
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Here is the real info
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Handy 21
In August 1999, Scientific American covered a similar technology being developed at MIT, but in this case, the reconfigurable computation was targeted at a handheld device dubbed the "Handy 21" which could act as a cell phone or PDA or FM radio by changing its circuitry.
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Jesus wept...
there has been no innovation in any field of science or technology.
Man, thats an ignorant point of view. Just the list of biological advances (can you spell "genome") could fill this text box. Virology, stem cell research, gene splicing. Go pick up a copy of "Scientific American" or a "Nature" and stop asking such stupid questions. -
Action could be based on Sci Am EditorialLast month, Scientific American ran an editorial piece on genetic testing in the workplace. It was scathing. There were reactions to it in the CDC and the Departments of Labor and Justice. (Or so I heard from friends who work there.)
This is a day late and a dollar short, but better than nothing.
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Is it a threat?This reminded me of an article in Scientific American from several years back, The Specter of Biological Weapons . It is a highly rational and informative article on the difficulties, both practical and psychological, or biological warfare. The high points is that most people find such acts repulsive, and therefore will not commit them. Also at issue is that the agents are often as lethal to the perpetrator as the victim, leading to major difficulties in production and delivery.
To wit, it is easy for a human to use a virus to kill all the mice in a lab if the human is not susceptible to the virus. On the other hand, we have seen how difficult it is for a human to use a virus to kill other humans due to similar susceptibilities. Even something as simple as nerve gas requires special gear.
The one most famous case in which Europeans killed the natives of North America with smallpox was successful because the Europeans had a much lower susceptibility to smallpox. This is not the case for sarin, anthrax, or possibly genetically engineered smallpox. To handle such items, a proper protective infrastructure must exist which can increases the visibility of the to be warrior.
I feel much more threatened by super viruses created by the abuse of antibiotics. These agents exist. They already cause suffering. They move easily through the exisiting food chain to unsuspecting victim.
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High Time, but too late for some.These regulations are too late for many people, as a news brief on firing by genetype makes clear in this month's Scientific American.
Although it may be illegal by the ADA, I know of people who were not hired because of health info, and I know another who was denied a mortgage because of a heart ailment.
May this help others in like case.
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High Time, but too late for some.These regulations are too late for many people, as a news brief on firing by genetype makes clear in this month's Scientific American.
Although it may be illegal by the ADA, I know of people who were not hired because of health info, and I know another who was denied a mortgage because of a heart ailment.
May this help others in like case.
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Re:Echoes of SeaQuestif silicon-based life -- intelligent or otherwise -- were to be found, it'd go beyond coolness and come out the other side.
Time to reprise my post from a previous space life article: silicon won't work as a basis for organic life.
The main candidates out there are carbon/water life vaguely similar to stuff on Earth, perhaps carbon/ammonia (or other simple solvent) in a colder environment, and possibly machine intelligence (previously built by carbon folk).
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Re:Life as we know it
Science fantasy authors love to write stories about "silicon-based life", but anyone with sufficient training in biochemistry can tell you silicon won't work as a basis for organic life.
And if you're going to consider even more exotic ideas ("photonic life" a la Star Trek, or neutronium life), you might as well be discussing ghosts and gremlins. They're just as plausible.
The main candidates out there are carbon/water life vaguely similar to stuff on Earth, and possibly machine intelligence (previously built by carbon/water life).
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The power of disinformation
Assuming that the identifying factor in the ink really was an amplified portion of someone's DNA, it wouldn't be hard to replicate simply by doing PCR on all the notable strands in the broth. If there's enough for some Olympic "official" to wave a wand over and detect, there's enough to replicate. PCR is not hard - the July 2000 issue of Scientific American has a method by which you can perform it at home with a couple hundred dollars worth of easily-obtained equipment (which they will sell you at cost). If it's worth going to the trouble of sewing in labels to counterfeit this junk clothing, it'll be just as worth brewing up a big batch of ink to spray on (in fact it'll probably be cheaper).
Further assuming they're not full of horse manure with this announcement, why would they use human DNA? Symbolic value? Any sort of plant or animal DNA would have worked, and there are probably other kinds better suited to this sort of application - but it makes a better, more mystically valid-seeming announcement if it's a human athlete.
I suspect they're using some typical glow-in-the-dark chemical ink of the sort that's been in use for at least a decade, and the DNA nonsense is just misdirection. I don't believe the Olympic brownshirts running after street vendors would really have the equipment or clue to test for a particular sequence of human DNA, though they could test for the presence of any DNA (as many other not particularly remarkable chemicals). The existing special inks would probably be harder to replicate, ironically enough, because that's one of their specific design goals.
This is trendy, high-tech seeming hype. Fortunately for the Olympic committee, this clothing and paraphrenalia is destined to have it's valuelessness exposed in a few months anyway, so their "security" measures (including this obfuscation) don't have to hold up for very long anyway.
Personally I'll just watch the Special Olympics, the last bastion of what the modern Olympics were supposed to stand for before T-shirts and $#@$!ing pins took over... -
Scientific American article on MRAM
Scientific American had an article about MRAM a while ago. You appear to be confusing two things.. RDRAM and DDR DRAM are about the way the ram communicates with the rest of the computer, while magnetic ram is a different storage technology on the memory chips themselves, like SRAM, and thus could be used instead of DRAM on both Rambus and regular DDR memory modules.
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Re:Gotta love this stuff
Or you could grow your own. Scientific American for August has this article on growing your own plankton. Processors couldn't be much more complicated than rotifers, eh?
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SETI is a scam
it's one of those things that SOUNDS good prima facie, like "gets your message out to 25 million email addresses! Unlimited Income opportunity!!!" just a little thought (again see a recent SciAm) reveals that it's like trying to listen for fleas next to Niagra Falls - In a Universe of powerful quasars and other radio sources any intelligent signal (unless the ET's are modulating a pulsar or something and somehow beaming it our way) would be way too puny to detect. You stand about as much chance as winning the powerball, hitting 18 holes in one, getting hit by lightning AND a meteorite all on the same day.
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Interesting Articles on Neutron Stars
Just thought some of you might like a more in-depth look at neutron stars. I've been doing some reading on neutron stars in the last few days, so I hunted around in my browser's history and found the two articles I had been reading.
The first one, by New Scientist, is a neat article on stars and their hunger for the planets around them.
The second one, by Scientific American, is a bit technical, but it describes how the X-ray emissions from neutron stars are being used to estimate their size.
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Sci Amer: Discovery of Brown Dwarfs
here is the link to the story he mentioned. It really is a great article for us amature star gazers. :)so we have these huge things floating around... suppose one of them entered out system? i suppose it would be captured and begin orbiting our sun also, but think of the damage it would do before settling down (if it ever would).
perhaps the next great "comet" movie should be about a free floating planet or star
:)
.sigs are dumb!
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Top 10 reasons to tax Internet deals
1) Because all those people online are having FUN! The people who are NOT online can't stand it and want to put a stop to it.
2) To generate funds for a manned mission to Mars.
3) To increase certainty and stability, since the only things you can depend on is death and taxes.
4) Pay off the hugh US national mountain of debt - of course investors in T-bills won't like having their taxpayer "pay or go to jail" backed high grade securities, bonds and debt obligations retired.
5) Bread and Circuses for all!
6) Military buildup for upcoming nuke war w/ China over Formosa
7) Funds for free health care
8) Expand White House summer intern program
9) Because everything is taxed.
Finally, the top reason to tax internet deals:
10) To fund the final stages of the US shift to global socialism, where there are no possessions! No work or need to compete for a living! Everything is free! The lion lays down with the lamb, and peace, harmony, sibling love and understanding comes to all, bombers turn into butterflys - This is the dawning of the Age of Aquarius...yada dada dada dada da. -
Re:Random questions
I'm so glad to read about the fantastic success of Galileo, and the great scientific results it is producing. I remember, as a child, sitting at my TRS-80 downloading articles from the local planetarium's BBS at 300 baud about the upcoming launch of Galileo. I read about it's trajectory, VEEGA (Venus-Earth-Earth Gravity Assist) long before I had any idea how a gravity assist worked.
I would like to see more flybys of Callisto too. Of course, if the mission gets extended another 14 months, surely there'll be time for study of Callisto in addition to the other 3 big moons.
Good idea about re-engineering the communication system. However, I'd bet the transmitter couldn't send pings powerful enough to get any discernible data, especially with the problems it's had (failure of the main antenna to unfurl). The magnetic disturbances the probe detected are a damn good indicator of a conducting (salt-water) sphere, though. As sophomore physics teaches us, a conductor naturally cancels any magnetic field it's embedded in. So when the probe detects a weakened field around the moon, you can deduce that the moon has a conducting sphere.
As for energy to support life, I tend to agree with you. Europa's proximity to Jupiter, as well as resonance with Io and Ganymede, cause a lot of tidal flexing, and this flexing generates a lot of heat. Enough heat to allow water to exist in a liquid state, IMHO, would be enough heat to support single-celled organisms.
I really enjoyed this Times article. It referred to the Scientific American article, which turns out to be available online here. Check it out. More great details and more pretty pictures!
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Negative EnergyResearch has shown that negative energy may have the ability to create worm holes and faster than light travel. See Scientific American
Do you belive that the creation of Negative Energy in the lab, even in nearly unmeasurable amounts, will be an obtainable goal in the next 10 to 15 years? If so do you think that it will make possible the proof of theroies about fater than light travel and wormholes?
Also how do you think this will change peoples views on Einstien's Theroies? If at all.
From Scientific American Article Summries:
Negative Energy, Wormholes and Warp Drive
Lawrence H. Ford and Thomas A. Roman
Contrary to a popular misconception, Albert Einsteins theories do not strictly forbid either faster-than-light travel or time travel. In principle, by harnessing the elusive force of negative energy, one can shorten stellar distances by bending space-time around would-be star trekkers. -
"More Evil the Satan" not an easter egg.
Some news site somewhere talked about this. There are a number of other fun things to try. You can also try other things like:
"Best Operating System"
This gives you the "Linux home page" as the top match.
Oddly enough, if you type "Best Operating System in the World", you get Microsoft.com, followed by the "Linux Home Page", a FreeBSD link and a Debian link.
All this is just a consequence of the way the system works. Interested parties should check out this article in Scientific American.
I suppose it is only a matter of time before site authors start trying to influence all this. -
Re:The Coming XISC Evo/RevolutionMIT has a lab researching pretty much exactly what you are talking about, except in a new hardware-based architecture they call RAW, and it's part of the Oxygen project (you know, make computing as pervasive as oxygen...). There was an article in Scientific American a couple of months ago (August 1999). Here's the url to the issue.
This is the actual site at MIT: www.cag.lcs.mit.edu/raw/
The Oxygen project is part of the Labortatory of Computer Science at MIT, but it's kind of a pain to get direct info off of MIT's site. The best I could find is a list of articles of LCS in the news, that includes the Scientific American articles. www.lcs.mit.edu/news/inthenews/
It seems to be a new project (started in April) with a lot of money (38 million from DARPA), and, I'm sure this will piss some of you off, a new 20 million dollar facility donated by - you guessed it - Bill Gates.
From these articles, I get the impression that the technology goes a ways beyond FPGA's, because it is actually a whole bunch of processing units tiled together, and they plan to run multiple "programs" at once by varying the paths through the tiles. So, the chip could be a custom video chip and a radio and a cell phone at the same time. The last line in the article kind of sums it up:"...within a couple of decades there will be only three kinds of chips in the world: Raw chips, memory chips and, of course, potato chips." As long as we still have potato chips...
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Re:cryptography is questionable
Actually, I remember reading something about the possibility of teleportation/action at a distance in relation to entanglement. I don't remember where, but check out this article from Scientific American for some cool info.
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Re:It looks like . . .
The MIT project you are thinking of is probably the RAW project. The web site is a bit sparse - not much more than a list of all of the groups research papers. You can get a bit more info about the project in the latest Scientific American in the section about MIT's Oxygen project (hey the article is actually online too - go read it here. Note that it is aimed at the general public, so it's on the simplistic side).
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Re:Not a problem
Here is the July SA letter to the editor and reply: Black Holes at Brookhaven?
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SkepticalIn the article it says that faint traces of water in the soil are assumed. Isn't that most of the problem? That mars is a dry planet? Also, there is some oxygen in the atmosphere of Mars. It seems unlikely that, given previous evidence of amino acids (but not DNA or RNA) in meterorites, there could be a form of life on Earth which wouldn't need substantial changes in its system to survive on Mars.
Scientific American has some information on this.
-Ben Shniper