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PhD Candidate Talks About the Physics of Space Battles 361

darthvader100 writes "Gizmodo has run an article with some predictions on what future space battles will be like. The author brings up several theories on propulsion (and orbits), weapons (explosives, kinetic and laser), and design. Sounds like the ideal shape for spaceships will be spherical, like the one in the Hitchhiker's Guide movie."
Science

Aussie Scientists Find Coconut-Carrying Octopus 205

An anonymous reader writes with this excerpt from an AP report: "Australian scientists have discovered an octopus in Indonesia that collects coconut shells for shelter — unusually sophisticated behavior that the researchers believe is the first evidence of tool use in an invertebrate animal. The scientists filmed the veined octopus, Amphioctopus marginatus, selecting halved coconut shells from the sea floor, emptying them out, carrying them under their bodies up to 65 feet (20 meters), and assembling two shells together to make a spherical hiding spot. ... 'I was gobsmacked,' said Finn, a research biologist at the museum who specializes in cephalopods. 'I mean, I've seen a lot of octopuses hiding in shells, but I've never seen one that grabs it up and jogs across the sea floor. I was trying hard not to laugh.'"
Earth

Yellowstone Supervolcano Larger Than First Thought 451

drewtheman writes "New studies of the plumbing that feeds the Yellowstone supervolcano in Wyoming's Yellowstone National Park shows the plume and the magma chamber under the volcano are larger than first thought and contradicts claims that only shallow hot rock exists. University of Utah research professor of geophysics Robert Smith led four separate studies that verify a plume of hot and molten rock at least 410 miles deep that rises at an angle from the northwest."
Businesses

Treading the Fuzzy Line Between Game Cloning and Theft 235

eldavojohn writes "Ars analyzes some knockoffs and near-knockoffs in the gaming world that led to problems with the original developers. Jenova Chen, creator of Flower and flOw, discusses how he feels about the clones made of his games. Chen reveals his true feelings about the takedown of Aquatica (a flOw knockoff): 'What bothers me the most is that because of my own overreaction, I might have created a lot of inconvenience to the creator of Aquatica and interrupted his game-making. He is clearly talented, and certainly a fan of flOw. I hope he can continue creating video games, but with his own design.' The article also notes the apparent similarities between Zynga's Cafe World and Playfish's Restaurant City (the two most popular Facebook games). Is that cloning or theft? Should clones be welcomed or abhorred?"

Comment Re:It's that computer called the brain. (Score 1) 257

One thing that helps is to specifically look at damage mechanisms and then come up with a strategy that offers the best workaround. As an example, in the first-generation TDMA digital cellular phone standard, it was recognized that channel noise was typically bursty. You could lose much of one frame of data, but adjacent frames would be OK. So they encoded important data with a 4:1 forward error correction scheme, and then interleaved the encoded data over two frames. If you lost a frame, the de-interleaving process followed by a maximum-likelyhood data detector would still properly decode the data.

On a disk, a similar approach might be to use a 2:1 or 3:1 forward error correction and then interleave data over multiple sectors. If you wipe out a sector, you'd still have the data from the other sectors to recover from.

This would, of course, be implemented best at a low level on the disk drive controller. At high throughput rates, the amount of computation required for this scheme is substantial. But you don't get something for nothing.

Submission + - FIRST Robotics comes to Public Television

An anonymous reader writes: This is information about Gearing Up, a film about the 2008 FIRST Robotics competition that is airing on public television this month.

Gearing Up, a one-hour documentary from KETC St. Louis and Story House Productions, chronicles the behind-the-scenes drama and excitement of the 2008 FIRST Robotics competition. More than 37,500 students in 48 states took part in the competition, which is a popular annual event created by inventor Dean Kamen in 1989. Participation in FIRST Robotics has grown tremendously, increasing from 28 teams in its first year to almost 1,700 in 2008.
        The film will air on public television stations in Fall 2009. An updated broadcast schedule can be accessed here: http://www.gearingupproject.org/where-to-watch/
        Gearing Up focuses on four teams heading for the 2008 FIRST Robotics Regional Competition: Miss Daisy, a seasoned team from Ambler, Pennsylvania; Robodoves, a small, all-girl rookie team from Baltimore; Rambotics, a team of teenaged felons incarcerated at the Ridge View correctional facility for boys in Watkins, Colorado; and Ratchet Rockers, a group of suburban kids from Wentzville, Missouri. Each team raises money for a robot kit, issued by FIRST. Each kit has identical parts, but no real instructions. The idea is for each team to create a unique robot capable of performing the same, predetermined challenge. After that, the game is on!
        The robots are remotely operated, and the 2008 competition required them to zip around a small track maneuvering 40-inch, 10-pound balls that had to be lifted off, over, and onto an elevated bridge. Gearing Up details the triumphs and disasters teams encounter as they share ideas, discuss their designs, and work out technical challenges while racing to complete their robots in time for the competition. The Robodoves celebrate finishing their robot two weeks early, while the Rambotics get a slow start complicated by three students who escape from school. Students on the Ratchet Rockers express doubts that their robot will even work, while the Miss Daisy team contends with a robot that must lose five pounds overnight to meet eligibility requirements.
        At the regional competitions in St. Louis, Philadelphia, Denver and Annapolis, teams get a first look at the designs and solutions of other students, including a fearsome group of robots capable of flinging the huge balls to the other side of the playing arena. They also get a taste of the real world as they struggle for the competitive edge with no money, no time, and no resources. Through round after round, the Robodoves, Miss Daisy, Rambotics and Ratchet Rockers contend with broken wheels, welds, and electronics; illegal bumpers; stripped gears; reckless navigating and robots that simply fall over. And round after round the teams find the support they need from their mentors.
          “This whole experience has really changed my life,” says Katelynn Burns, a member of the Ratchet Rockers. “I am seriously considering going into engineering and I would have [previously] thought that was the total geek thing to do.But you know what? I actually think it would be extremely fun.” Russell Burchill, adult coach for the Rambotics, says, “We walked away and thought to ourselves, this is probably the most powerful thing we had ever seen, as a group of teachers.”
        The annual competition enjoys support from FIRST (For Inspiration and Recognition of Science and Technology), as well as from the STEM project, a national initiative supporting science, technology, engineering, and math education.
        Gearing Up is funded by a grant from the Corporation for Public Broadcasting (CPB) and is co-produced by KETC/Channel 9 in St. Louis, Missouri, and Story House Productions in Washington, D.C. CPB has also funded a national community engagement pilot project, managed by KETC, that is designed to deepen youth engagement in STEM learning by building, strengthening and growing partnerships between public media and partner organizations in local communities across America. Gearing Up is presented and distributed by American Public Television.
The Internet

Submission + - Recovering the slums of the internet? (washingtonpost.com)

turtleshadow writes: Brian Krebs of Security Fix Blog analyzed the McColo Spamming one year later and asks an interesting question.
"How does one renovate and recoup the lost trust to the slums of the Internet and reclaim back all the domains and IP's that have been blacklisted?"

Indeed the economic benefits abound when a huge swath of illegal and annoying activity ceases but given the basic design of the internet what happens over the long run to IP space and DNS when hosting companies come and go and vary in their trustworthiness.

So too also now that Geocities is dead by economic means but does that still live in your filter list? It still appears in OpenDNS under several policy categories
How in a few years will I tell if some Hosting/Colo sold me Whitechapel Road/Ventura Avenue for Mayfair/Boardwalk prices and no one is going to accept my mail from a former slum?

I ask Slashdotters — when do you, if ever roll back the blacklists and filters for "dead" threats and spammers? Else is there a risk of garbage/crud lists all over the place interfering with routing and access to content?

Submission + - Shape-shifting robots on their way (computerworld.com)

Lucas123 writes: Using distributed computing and robotics, scientists at Intel and at Carnegie Mellon University are working to take millions of millimeter-sized robots and enable them through software and electromagnetic forces to take on various shapes and sizes — imagine a cell phone that could turn into headphones.The programmable matter is called claytronics and the tiny robots are called catoms. Each catom will have its own processor. Think of each catom as a tiny robot or computer that has computational power, memory and the ability to store and share power. "Optimistically, we could see this in three to five years. It will take us longer.... We're not there yet, but we see a path," said Jason Campbell, a senior staff research scientist at Intel's research lab in Pittsburgh,

Comment Re:claims (Score 3, Informative) 657

Remember that they all have to apply. This isn't exactly sudo.

Not correct. Of the claims you listed, 1, 2, and 9 are independent claims and can stand alone. A competitive product that incorporated just the elements of, say, claim 9, would violate this patent. A prior art product that included the elements of claim 1 would invalidate claim 1 as an independent claim, but not necessarily the combinations of claim 1 and claim 13 or claim 1 and claim 14. Unless the dependent claims 13 and 14 were subsequently judged to be obvious in light of the earlier product that demonstrated claim 1.

To an aggressive patent prosecutor, "exactly" has nothing to do with it. The approach is "We've got this patent, see? Pay us the money or we'll sue until you're out of business".

Comment Re:armadillo placed second! (Score 3, Insightful) 110

Armadillo completed the challenge several months ago, but their landing accuracy was slightly worse than Masten's attempt. Masten completed the challenge only one day before the expiration of the contest, and was able to do it only because another competitor failed and the X prize foundation allowed Masten to use their launch window (they'd earlier used up their scheduled time slots without doing a successful flight). Armadillo didn't have time or launch permits to go back and improve their accuracy.

John Carmack was understandably disappointed in losing the $500K but is taking the long view that Masten needs the money more than they do, and they've already moved on to new projects.

Comment Re:The Moon (Score 1) 703

If I interpret this correctly, Jupiter exerts 400 times as much tidal effect as Mars does. So doubling Mars' mass would have some slight effect, but it would still be overwhelmed by what Jupiter does to us.

If you actually had to move Mercury to Mars in real (non-wormhole) space, then you'd have to figure out a trajectory where Venus and Earth were each at opposition when you were trying to sneak Mercury by those planets' orbital radius. And you'd want Mars to be waiting when you got out to that orbit, too. The motion of the four involved planets is out of synchrony enough that there's probably a suitable window every couple of decades... if only you had enough energy available to get Mercury moving and then stopped.

Comment Re:The Moon (Score 2, Funny) 703

So, you also create a wormhole between Mercury and Mars... and transport Mercury over to Mars. Since Mercury is basically a big nearly-melted metal ingot it will add some much needed mass, as well as enough metal content to hopefully give Mars a magnetic field that will be useful in deflecting the solar wind. It might take a couple millennia for the surface of the new planet to settle, but the impact energy should keep things warm for a while. Boosting Mercury to Mars' orbit and matching orbital parameters with Mars would be quite a challenge. Don't forget that you need to somehow arrange for the angular momentum of the new planet to be correct so that you keep a reasonable daylength.

Comment Re:Why? (Score 1) 188

Collecting exercise data and keeping it for later analysis or comparison can be a great motivational tool especially when you're in the early stages of an exercise program. On a day to day basis it may not feel like you're getting any more fit or going faster, but you can look at a trend line based on a month's data and clearly see that you're going farther, faster, and at a lower perceived effort level (or with a lower heart rate).

Some fitness metrics are hard to quantify based on a single exercise session, so it's worth it to have data for different days, doing different things.

Disclosure: I design and test fitness monitoring products for one of the companies mentioned by several of the posters. As a group we're some of the fittest nerds around.

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