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Submission + - Cold Warriors Question Nukes (wordpress.com)

Martin Hellman writes: "George Shultz served as President Reagan's Secretary of State, and Bill Perry as President Clinton's Secretary of Defense. Henry Kissinger was National Security Advisor and Secretary of State to both President Nixon and Ford. Sam Nunn was Chair of the Senate Armed Services Committee for eight years. Their key roles in the Cold War has led many to call them "½ÂoeCold Warriors." That status makes their recent, repeated calls for fundamentally re-examining our nuclear posture all the more noteworthy. Their most recent attempt to awaken society to the unacceptable risk posed by nuclear weapons is an OpEd in today's Wall Street Journal Deterrence in the Age of Nuclear Proliferation. (That link requires a subscription to the Journal. There is also a subscription-free link at the Nuclear Threat Initiative.) Key excerpts and links to other resources are available."

Comment Re:Bring back Neutron Jack (Score 1) 301

I'm not so sure about that. Gas turbines have a higher power density (kW/kg and kW/m^3), but I believe they have lower efficiency than diesels for automotive use. Aircraft operating at high altitudes, where the incoming air is very cold, can be more efficient. That's because the work to compress the air to get it into the combustion chamber is proportional to volume, not mass, and cold air has a smaller volume. Also, I believe that small turbines are less efficient than large ones due to gap clearance (related to inefficiency) does not scale exactly. Gas turbines used for electrical generation are more efficient, but I believe that's because they use the waste heat in a "combined cycle" to run a steam turbine or some other secondary generator. Can someone who knows for sure chime in?
Businesses

GE To Buy 25,000 EVs, Starting With the Chevy Volt 301

DeviceGuru writes "In what's claimed as the largest-ever single electric vehicle commitment, GE plans to acquire 25,000 electric vehicles by 2015. The buying spree will initially involve 12,000 GM vehicles, beginning with GM's Chevy Volt in 2011. By converting most of its own 30,000-strong global fleet, and promoting EV adoption among its 65,000 global fleet customers, GE hopes to be in a strong position to help deploy the vehicles' supporting infrastructure, including charging stations, circuit protection equipment, and transformers. In contrast to the all-electric Nissan Leaf, the Volt implements a small gas engine, which can recharge the vehicle's battery to extend its range beyond the 100 mile limit of all-electric cars like the Leaf, leading some to question the Volt's EV credentials."
Movies

Submission + - Roku Now Licensing its Media Player Design (deviceguru.com) 2

__aajbyc7391 writes: Roku has begun licensing its A/V media streaming set-top-box hardware and software technology to third-party device makers. Netgear, Roku's first licensee, will soon offer a Netgear-branded version of the recently size- and cost-reduced Roku XDS box through Best Buy, Fry's, and Radio Shack stores. Although Roku's licensing move follows closely on the heels Google's October rollout of the Google TV platform, the $60 to $100 Roku XD player design's low-cost, low-power, compact design, and sheer ease-of-use make it a compelling alternative to Google TV, assuming Google's platform results in priced like Logitech's $300 Review. As a small example, the Roku player most likely uses an inexpensive, power-stingy MIPS-based NXP processor in contrast to the Review's more power-thirsty, expensive, and spacious Atom processor.

Submission + - Risky Nuclear Designs

Martin Hellman writes: Yesterday, Slashdot reported that a system failure at Warren AFB in Wyoming affected 50 ICBM’s and that “various security protocols built into the missile delivery system, like intrusion alarms and warhead separation alarms, were offline.” Assuaging fears that America’s nuclear deterrent might have been compromised during this failure, the source article notes that the missiles still could be launched from airborne command centers. Other reports cite an administration official offering assurances that "at no time did the president's ability [to launch] decrease." Given the difficulty of debugging software and hardware that is probably not a good thing. The history of nuclear command and control systems has too many examples of risky designs that favor the ability to launch over the danger of an accidental one.
Google

Submission + - The Android Invasion Cometh; is Resistance Futile? (deviceguru.com) 1

__aajbyc7391 writes: Last month, we learned from Gartner that Android will probably be the number-two worldwide mobile OS this year, and may lead the pack by 2014. With Android's growing use as the OS embedded in phones, in tablets, in set-top boxes, and in LCD HDTVs, it seems like the Linux-based OS could end up dominating the entire non-PC consumer device operating system space. What do Slashdot readers think: Is resistance futile?

Submission + - Programmable Magnets (popularmechanics.com)

Martin Hellman writes: Popular Mechanics has given one of its Breakthrough Awards for the invention of "programmable magnets." Instead of having a single North or South pole, these clever devices have an array of North and South poles. If a matching device with exactly the same array is aligned with the first one, they will experience strong repulsion, just like two single North poles do when brought near one another. If the matching device has the complementary array (North and South interchanged), with correct alignment the two devices will attract. But a slight misalignment will cancel most of the force. Apparently other configurations are possible as well, allowing frictionless magnetic gears and exploding toys. (The exploding toys video is near the bottom right of the second linked page.) The inventor, Larry Fullerton, used techniques similar to those from CDMA modulation. (Watch the Intro video on that same, second linked page for a brief explanation. While I don't understand magnetism that well, I do understand CDMA and carrying over those ideas to magnetic arrays does make sense to me.)

Submission + - General Drops Nuclear Bombshell (wordpress.com)

Martin Hellman writes: Former Chairman of the Joint Chiefs of Staff, Gen. Hugh Shelton, has dropped a nuclear bombshell, metaphorically speaking. Shelton’s recently released memoirs "Without Hesitation: The Odyssey of an American Warrior," assert that President Clinton lost a card containing key phrases needed for ordering a nuclear strike, and that the codes were missing for months. This confirms a similar allegation, made in 2004 by Lt. Col. Robert Patterson, a military aide who frequently carried the “nuclear football” during the Clinton presidency. Unfortunately, human error within the nuclear weapons complex is a frequent and dangerous occurrence.
Idle

Submission + - Man served restraining order via Facebook (itnews.com.au) 1

schliz writes: An Australian man has been served a restraining order via Facebook, after unsuccessful attempts by police to reach him by phone and in person. The man was a "prolific Facebook user" who had allegedly threatened, bullied and harassed a former partner online. He was served both interim and final intervention orders by Facebook, after a local magistrate upheld the interim order indefinitely.

Submission + - Hackers blind quantum cryptographers (cccure.org)

Martin Hellman writes: According to an article in Nature magazine, Quantum hackers have performed the first 'invisible' attack on two commercial quantum cryptographic systems. By using lasers on the systems — which use quantum states of light to encrypt information for transmission —" they have fully cracked their encryption keys, yet left no trace of the hack."

Feed Wired: Making Geeks Cool Could Reform Education (wired.com)

Earlier this year in midtown Manhattan, a local venture capital firm staged a daylong conference on school reform. Authors, professors, financiers, and entrepreneurs took over the French Institute's skylighted penthouse and earnestly discussed how embracing "digital culture"—from deploying videogame-style rewards to encouraging kids to develop online reputations—could completely transform education. Outsiders were invited to participate via Twitter, and their ideas were projected on the wall. It was a high-minded, tech-centric affair—until Alex Grodd brought it back to earth.

Although Grodd now runs a site that lets educators share lesson plans, he started out teaching at inner-city middle schools in Atlanta and Boston. The businesspeople in the room represented a world in which innovation requires disruption. But Grodd knew their ideas would test poorly with real disrupters: kids in a classroom. "The driving force in the life of a child, starting much earlier than it used to be, is to be cool, to fit in," Grodd told the group. "And pretty universally, it's cool to rebel." In other words, prepare for you and your netbook to be jeered out of the room. "The best schools," Grodd told me later, "are able to make learning cool, so the cool kids are the ones who get As. That's an art."

It's an art that has, for the most part, been lost on educators. The notion itself seems incredibly daunting—until you look at one maligned subculture in which the smartest members are also the most popular: the geeks. If you want to reform schools, you've got to make them geekier.

"Geeks get things done. They're possessed. They can't help themselves," says Larry Rosenstock, founding principal of eight charter schools in San Diego County collectively called High Tech High. He has come up with a curriculum that forces kids to embrace their inner geek by pushing them to create. The walls, desks, and ceilings of his classrooms teem with projects, from field guides on local wildlife to human-powered submarines. (A High Tech High art project called Calculicious, based entirely on math principles, now hangs in the San Diego airport.) The students all work in small groups as a way to foster shared enthusiasm: Get two kids excited about something and it's harder for a third to poke fun at them.

But more important, Rosenstock keeps the students surrounded by adults. There are no teachers' bathrooms or lounges. Parents roam the halls. And the students are required to present their work to outsiders. This, it turns out, is the key to geekifying education. "A big chunk of the school experience is having them hang out with the adults they could imagine becoming," says private-equity manager Tom Vander Ark, former head of education investments for the Bill & Melinda Gates Foundation and a onetime school superintendent. "A big high school has a youth-owned culture. You've got to break that."

The result: One hundred percent of High Tech graduates get into college. Nationally, the college attendance rate for High Tech High's demographic—half are eligible for free lunch, and even fewer have parents who attended college—is about 55 percent. Yet all High Tech students take advanced math and science classes, and many of them end up at universities like MIT and Stanford.

Back on the East Coast, in one of Boston's toughest neighborhoods, Roxbury Prep (where Grodd once taught) uses a similar formula. Almost 80 percent of its eighth graders—nearly all of whom come from families earning less than $28,000 a year—go to college. Their teachers work nonstop to stamp out youth culture: Kids eat lunch in the classroom, they're not allowed to talk in the halls, and they're disciplined for using the word nerd. But it's about the nerdiest school you can imagine; every week, the faculty awards one child a "spirit stick"—a bedpost painted a rainbow of colors—for good grades.

In the public school I attended, that would be a homing beacon for a beating: "There's the nerd with the stick. Jump him!" But in geeked-out schools, that wouldn't happen—because everyone would be a nerd. At the final spirit-stick ceremony last year, 220 kids erupted in applause as a teacher read aloud the 14-year-old honoree's thesis. It started by calling America an "unfair and superficial nation." Hey, kids are going to rebel; better to have them cheered for doing it with contentious ideas.

Senior writer Daniel Roth (daniel_roth@wired.com) wrote about innovation in the wake of the financial crisis in issue 17.07.



Comment Missing Numbers in Article (Score 2, Insightful) 550

The article says "Transportation of the solar panels into space is too expensive at the moment to be commercially viable, so Japan has to figure out a way to lower costs," so the transportation costs cannot be included in the stated $21B figure, making it seem of little value. At first I was really impressed since $21 a watt is within striking distance of being economically competitive. (Fossil fuel powered plants cost in the vicinity of $5 per watt to build PLUS fuel costs. And any new technology tends to come down in price with experience.) Another possible problem: The article says the satellite "produces" one gigawatt, which may not be the same as receiving one gigawatt on the ground. Anyone know the answer to that question?

Comment Other ways to look at it (Score 1) 1

Thanks for pointing people to that page. While the man in the TNT vest -- and the Earth in a nuclear suicide vest -- are striking images, there are other analogies for seeing how crazy it is that society ignores the issue. Even if one is optimistic enough to believe we could expect to survive 1,000 years with nuclear weapons that would be equivalent to: 1. Roughly a 10% chance that a child born today would not live out his or her natural life, which would make nuclear weapons a higher fatality risk than all but three other causes of death. 2. Doing two parachute jumps each week -- but with all of humanity in the harness. 3. Living in a city surrounded by over 1,000 nuclear power plants -- if that's even possible. If we can only expect to survive 100 years with nuclear weapons, the above risks jump by 10 so that: 1. Nuclear weapons become the most likely cause of death, exceeding even heart disease. 2. You'd have to do three parachute jumps every day to equal the risk -- again with all of humanity in the harness. 3. You'd now need over 10,000 nukes surrounding your town to equal the risk from nuclear weapons. We wouldn't tolerate these other risks, so why are we silent on nuclear weapons?

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