Tuesday, February 12, 2013

NASA set for new round of J-2X Testing at Stennis Space Center

Feb. 12, 2013 ? NASA's progress toward a return to deep space missions continues with a new round of upcoming tests on the next-generation J-2X rocket engine, which will help power the agency's Space Launch System (SLS) to new destinations in the solar system.

Beginning this month, engineers will conduct a series of tests on the second J-2X development engine, designated number 10002, on the A-2 Test Stand at NASA's Stennis Space Center in Mississippi. Once the series is completed, the engine will be transferred to the A-1 Test Stand to undergo a series of gimbal, or pivot, tests for the first time.

"The upcoming test series is not only a critical step forward, but important to the Stennis test team, as well," said Gary Benton, manager of the J-2X test project at Stennis. "This test series will help us increase our knowledge of the J-2X and its performance capabilities. In addition, the series will help us maintain the high skill level of our team as we look ahead to continued J-2X testing and testing of the RS-25 engines that will be used to power the SLS first-stage."

The first objective of the testing is to verify and demonstrate the engine's capability. Data from what is known as hot-fire engine tests will be compared to the performance of the first engine. Engineers also will vary liquid hydrogen and liquid oxygen inlet pressures and subject the engine nozzle to higher temperatures than in previous tests to see what effect they have on performance.

NASA already has conducted successful tests on engine number 10001 and on the J-2X powerpack assembly. In total, 34 tests were conducted on the J-2X engine and powerpack, with the J-2X achieving a full flight-duration firing of 500 seconds in the eighth test, earlier than any rocket engine in U.S. history.

The engine is being designed and built by NASA and Pratt & Whitney Rocketdyne of Canoga Park, Calif., to power the upper stage of the 130 metric-ton (143-ton) version of the SLS rocket.

The SLS will launch NASA's Orion spacecraft and other payloads from the agency's Kennedy Space Center in Florida, providing an entirely new capability for human exploration beyond low-Earth orbit.

For more information about the J-2X engine and NASA's Space Launch System, visit: http://www.nasa.gov/sls

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The above story is reprinted from materials provided by NASA.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


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Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/space_time/nasa/~3/2oNQ0WudsB0/130212140842.htm

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Monday, February 11, 2013

Seagal, sheriff train Arizonans to guard schools

(AP) ? The self-proclaimed "America's Toughest Sheriff" joined forces this weekend with action movie star Steven Seagal to train volunteer armed posse members to defend Phoenix-area schools against gunmen.

Maricopa County Sheriff Joe Arpaio announced the controversial plan in the wake of the Newtown, Conn., school shooting that left 27 people dead, including the gunman and 20 first-graders.

The exercise took place Saturday at a closed school site in suburban Fountain Hills, outside Phoenix, where sheriff's SWAT members acted as shooters and teenagers played the part of students during mock scenarios involving up to three gunmen.

Seagal, best known for his roles in movies such as "Above the Law" and "Under Siege," planned to lead training on hand-to-hand defense tactics, among other techniques, drawing from his expertise in martial arts, according to a sheriff's office news release.

Arpaio's office didn't respond to requests for comment Friday and Saturday, and Seagal representatives also did not return telephone messages from The Associated Press.

When faced with criticism in January about the school posse plan, Arpaio snapped back, "Why would people complain about my posse being in front of schools to act as prevention?"

He boldly announced the plan on the grounds of an elementary school, saying at the time he wanted the patrols publicized.

"I want everyone to know about it for the deterrence effect," Arpaio said, adding that no taxpayer money would be spent on the patrols and volunteers will be supervised over the radio or telephone by actual deputies.

Arizona Democratic House Minority Leader Chad Campbell called the plan to use Seagal as an instructor "ludicrous."

"Steve Seagal is an actor. That's it. Why don't we also have Clint Eastwood and Chuck Norris and Bruce Willis come out and train them too while we're at it," Campbell said.

Campbell has been a vocal critic of Arpaio's school posse protection plan, complaining that using untrained, armed civilians to protect students is a bad idea and likely will only make the facilities more dangerous.

"He's making a mockery out of it. You're having a movie actor train people how to protect schools?" Campbell said.

Randy Parraz, president of Citizens for a Better Arizona, also a longtime Arpaio critic, said it's unfortunate the sheriff, known nationally for his tough stance on illegal immigration, is using the "wake of a tragedy like Newtown" to grab headlines.

"We'd like to think he would take something like this much more seriously," said Parraz, who added that his group planned to be at Saturday's event with petitions to recall Arpaio.

The patrols were launched at 59 schools in January throughout unincorporated areas and communities that pay Arpaio's agency for police services. The sheriff announced this week he needs more members to continue the patrols, calling for 1,000 additional citizens to step up and volunteer.

Current posse members already are used to bolster the sheriff's office force by providing police protection at malls during the holidays, directing traffic and transporting people to jail.

Arpaio even sent one group of posse members to Hawaii to conduct an examination into the authenticity of President Barack Obama's birth certificate.

Joselyn Wells, a mother of three children at a school in suburban Phoenix, where Arpaio's posse has begun patrolling, said she was excited to hear about the initiative.

"A lot of people sit around and watch these things happen, watch key signs and no one wants to do anything about it," she said when Arpaio announced the plan. "Nobody wants conflict, nobody wants to be out in the limelight. And he doesn't care. He wants to do the right thing."

Andrew Sanchez, however, a town council member in Guadalupe, said he wants nothing to do with posse members patrolling schools in his community, which spends about $1.2 million annually for Maricopa County sheriff's patrols.

"We are paying him to have certified deputies here, not to bring a circus and not to use our town as a political platform," Sanchez has said.

The volunteers, dressed in uniforms and driving patrol vehicles, some authorized to carry guns after training, won't go onto school grounds unless they spot danger, but will instead patrol around the facilities, Arpaio said.

Seagal is already a volunteer posse member in Maricopa County and has been deputized with sheriff's offices in New Mexico, Texas and Louisiana, where a film crew followed the actor on ride-alongs with Jefferson Parish sheriff's deputies for the reality TV show "Steven Seagal: Lawman."

Arpaio says other notable people also have joined his more than 3,000-strong volunteer armed posse, including "The Incredible Hulk" star Lou Ferrigno and actor Peter Lupus of TV's "Mission: Impossible."

___

Online:

http://www.mcso.org/About/Posse.aspx

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/4e67281c3f754d0696fbfdee0f3f1469/Article_2013-02-09-School%20Posses-Seagal/id-fba70fdc3252401e9277f4346d64a546

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Friday, February 8, 2013

Kim Dotcom?s Mega Gets A Full Time CEO To Build Out Its 2.5M User-Base

MEGA logoKim Dotcom?s latest venture Mega, which opened its doors last month offering encrypted cloud-storage services, has a new CEO -- announcing today that Vikram Kumar, former CEO of not-for-profit open internet advocacy organization InternetNZ, will take over from Mega's interim CEO, Tony Lentino.

Source: http://feedproxy.google.com/~r/Techcrunch/~3/C8gEXp3Fz6I/

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Thursday, February 7, 2013

Raccoons make home atop Wash. construction crane

(AP) ? Workers using a tower crane to build a 304-unit apartment complex in Seattle have run into a complication: two raccoons climbed 150 feet up the crane and made a home behind the crane's cab.

KING-TV reports (http://is.gd/ntbMII) that the raccoons have temporarily brought the giant machine to a halt.

A crane operator spotted the new residents while ascending the tower Wednesday. The general contractor, Rafn Company, called in experts who are trying to catch the critters with humane traps.

Project superintendent John Kellberg says this is a first for him.

The apartment complex in the city's Ballard neighborhood is due to open in the summer of 2014. KING reports that neighbors say large raccoons are common in Ballard.

___

Information from: KING-TV, http://www.king5.com/

Source: http://hosted2.ap.org/APDEFAULT/aa9398e6757a46fa93ed5dea7bd3729e/Article_2013-02-07-Crane-Raccoons/id-8c8beb90e8b74906b417dbba89d3a757

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Wednesday, February 6, 2013

iOS 6.1 Jailbreak Is Now Available

iOS 6.1 Jailbreak Is Now AvailableThe new iOS jailbreak tool, evasi0n is now available to download for Windows, Mac, and Linux to jailbreak devices running iOS 6 through 6.1.

The new jailbreak tool is compatible with all of Apple's currently available devices, including the iPhone 5 and iPad Mini. The jailbreak process is incredibly simple. Once you download evasi0n, just connect your iOS device with a USB cable, run the app, click "Jailbreak," and wait about five minutes. Eventually, evasi0n will ask you to unlock your device and tap the "Jailbreak" button on your home screen. From there, your iOS device will run through the boot process and finish up a few things. Once it's done, you're jailbroken. Hit the link below for download links for the software.

Evasi0n

Source: http://feeds.gawker.com/~r/lifehacker/full/~3/IpsMCzYdUqs/ios-61-jailbreak-is-now-available

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Is Nuclear Power Doomed to Dwindle?

crystal-river-nuclear-reactor

Courtesy of Progress Energy

The nuclear reactor near Crystal River north of Tampa Bay will never fission again. Duke Energy has decided to shutter the troubled nuclear power plant, which has been shut down since 2009 thanks to a crack in the dome that shields the reactor. Attempts to repair the initial crack had caused other cracks to form and the company estimated that fixing those cracks would cost another $1.5 billion minimum, possibly much more.

As a result, the reactor will instead be mothballed while Florida electricity customers can expect to foot a $1.6 billion bill from 2017 to 2037 to repay the utility for its investment in the nuclear power plant, according to a plan worked out by state regulators. The full tear-down will most likely wait for 40 to 60 years, according to a company statement, in part to avoid adding to that cost.

What will replace the reactor?s 860-megawatts worth of power? Electricity generated by natural gas turbines, according to Duke. In fact, cheap natural gas may sound the death knell for the nation?s dwindling number of nuclear reactors, now down to 102.

The Kewaunee nuclear power plant in Wisconsin will also close this year and plans for new nuclear power plants in Texas and Maryland have been scrapped. At the same time, costs have continued to rise for two reactors under construction in Georgia?the nation?s first new nuclear reactor approved in more than three decades. Critics argue that the new reactors at the Vogtle Power Plant involve too much risk for taxpayers given the $8 billion in loan guarantees that have been extended to Southern Company and partners to build them (though the loans have not been finalized or accepted as of yet). ?They [the U.S. Department of Energy] are socializing the risk and privatizing the profits for big power companies,? charged Sara Barczak of the Southern Alliance for Clean Energy in a conference call with reporters.

The woes facing nuclear reactors are not confined to the U.S. New reactors in France and Finland are behind schedule and over budget and Germany plans to phase out its nuclear fleet in coming years. Meanwhile, the politicians of Cumbria in northwest England voted to reject a planned repository for nuclear waste in their county. Paired with decisions by energy company Centrica to abandon plans to build new reactors in the U.K. and a new government report highlighting nuclear industry incompetence, nuclear energy may be ?finished in the U.K.,? according to nuclear power proponent and environmental columnist George Monbiot of The Guardian.

Nuclear power has more steam in countries such as China, which continues to push forward with a massive construction program in a bid to cut down on coal burning. Last week, Westinghouse lowered the top of the containment dome on its first new AP1000 reactor in Sanmen. But even 80 large nuclear power plants will do little to restrain China?s now world-leading greenhouse gas emissions (and air pollution) from all of the country?s coal burning. And Japan?s greenhouse gas emissions have surged in the wake of the decision to shut down that country?s nuclear fleet after the multiple meltdowns at Fukushima Daiichi.

U.S. greenhouse gas emissions have been falling in recent years, dropping by nearly 5 percent from power plants alone in 2011, according to Environmental Protection Agency data. Yet, if natural gas power plants begin to replace low carbon but aging nuclear power plants as well as high CO2 coal-fired ones in this country, CO2 emissions will not fall as far as fast?more fallout from the stalled nuclear renaissance.

?

Source: http://rss.sciam.com/click.phdo?i=c30551d9609f6a81bc57a05fc9d15aca

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Monday, February 4, 2013

School turnarounds prompt community backlash

LOS ANGELES (AP) ? The federal government's push for drastic reforms at chronically low achieving schools has led to takeovers by charter operators, overhauls of staff and curriculum, and even school shutdowns across the country.

It's also generated a growing backlash among the mostly low-income, minority communities where some see the reforms as not only disruptive in struggling neighborhoods, but also as civil rights violations since turnaround efforts primarily affect black and Latino students.

"Our concern is that these reforms have further destabilized our communities," said Jitu Brown, education organizer of Chicago's Kenwood-Oakwood Community Organization. "It's clear there's a different set of rules for African-American and Latino children than for their white counterparts."

The U.S. Department of Education's civil rights office has opened investigations into 33 complaints from parents and community members, representing 29 school districts ranging from big city systems such as Chicago, Detroit and Washington D.C. to smaller cities including Wichita and Ambler, Penn., said spokesman Daren Briscoe. Two additional complaints are under evaluation, and more cities, including Los Angeles, are preparing their filings.

Last week, Secretary Arne Duncan fielded complaints at a public forum in Washington. The forum was attended by some 250 people who boarded buses, vans and planes from around the country to demand a moratorium on school closings and present a reform model that calls for more community input, among other items.

The recurrent theme is that communities are fed up with substandard education, but want solutions that will not create upheaval at the schools, which are often seen as pillars of stability in neighborhoods where social fabric is fragile.

Instead of focusing on dramatically changing the structure of a school, officials should invest in improving teaching, learning, equipment, and community engagement, which happens more often at schools in white, affluent neighborhoods, Brown said.

"But the response of the school district is to throw a grenade into our schools," Brown said.

Reformers say civil rights complaints are misguided because school failure disproportionately impacts minorities in the first place. Turnarounds are efforts to improve that, said Michael Petrilli, executive vice president of the Thomas B. Fordham Institute, an education think tank.

However, he noted that turnarounds are often a "Band-Aid solution. Most of the turnarounds aren't going to succeed because the school continues to exist in a dysfunctional school system. Radical change at the district may be what's needed."

Federal officials said they are open to working with communities to lessen the impact of turnarounds.

"On the ground, these policies can have an impact we don't see," Briscoe said. "But there's no promise that we'll be able to satisfy all people."

Overhauling the nation's 5,000 lowest-performing schools is a cornerstone of the Obama administration's education policy. To do that, the federal government revamped the existing School Improvement Grant program, boosting it from a $125 million annual initiative in 2007 to $535 million for the current school year.

Under the renewed program, which launched in 2010 with a onetime $3.5 billion infusion, districts receive grants to institute one of four school jumpstart models. They can turn the school over to a charter or other operator, replace at least half of the staff and principal, transform the school with a new principal and learning strategy, or simply close the school. Improvement schools can receive up to $2 million annually for three years.

Results have been mixed.

In Chicago, where the nation's third largest school system has undertaken one of the more extensive turnaround programs, a study of 36 schools by the University of Chicago found some improvement in academic achievement in elementary and middle schools but not until the second or third year of either a principal or staff replacement or a charter conversion.

"They're closing the gap but it's taking some time to do so," said Marisa de la Torre, who directed the study.

With high schools, researchers did not have academic data to parse, so instead looked at attendance rates, which are often a good indicator of performance, de la Torre said. Attendance rates improved in the first year of a turnaround, but then reverted to pre-turnaround rates. "We can't really say if the glass is half full or half empty," de la Torre said.

A study released last May found graduation rates and college-prep course participation increased dramatically at a Los Angeles high school in the Watts section taken over by charter Green Dot Public Schools in 2008. The National Center for Research on Evaluation, Standards and Student Testing called the new Locke High School "an impressive success story in many ways," but noted overall achievement remains low.

To boost academic performance, Green Dot now plans to revamp its ninth-grade curriculum to offer more remedial help and open a middle school to better prepare kids for high school.

With no guarantee that turnarounds produce solid results quickly, some question whether drastic reform is worth the disruption, and whether less radical changes could work as well given adequate time and funding.

"We take issue with experimental reforms such as these when it is only children of color who are the subject of the experiment and especially when the experiment has already failed," wrote Jonathan Stith of Empower DC in his federal complaint about Washington D.C. schools.

Staff replacements have proven especially problematic at schools where teachers have to reapply for their jobs. Many don't reapply out of resentment and it's hard to find experienced teachers who want to work in an urban classroom.

A study by the National Education Policy Center found that in turnaround schools in Louisville, Ken., 40 percent of teachers were fresh out of college. Other reformed schools have had to start off with substitutes.

"Teachers are like their surrogate parents," said Christina Lewis, a special education teacher at Crenshaw High School in Los Angeles, where teachers will have to reapply for jobs in the fall when the school is converted to a magnet. "I'm so afraid that teachers who have put their hearts and souls into their jobs won't return next year. We just need stability and resources."

Experts also note that impoverished children often rely on schools for meals, positive role models, and mentors for personal issues, as well as education. Trust built with familiar faces in the school community gets severed by drastic reforms, said John Rogers, director at the University of California Los Angeles' Institute for Democracy, Education and Access.

Several students at Crenshaw High School in Los Angeles, where teachers must reapply for their jobs when the school is converted to a magnet program next fall, said it was disconcerting not to know who or what to expect.

"We have a lot of kids in foster care. Their lives are changing all the time," said Crenshaw student Anita Parker. "We have teachers who ask me if I need to talk. We have teachers who care about us."

The prospect of a civil rights complaint does not faze Los Angeles Unified Superintendent John Deasy, who has several high schools on his turnaround list. For Deasy, the real civil rights issue is that these schools have been allowed to fail for so long.

Crenshaw High School, the turnaround that is spurring community advocates to file the complaint, is the lowest performing school in the nation's second-largest system, a fact that Deasy called "immoral" at a recent school board meeting.

Just three percent of students are proficient in math and 17 percent in reading. Just 37 percent of students attend school 96 percent of the time. Just half of the class of 2012 graduated.

"Students aren't learning. Students aren't graduating," he said. "The purpose of this decision is to make sure Crenshaw gets dramatically and fundamentally better."

School board member Marguerite P. LaMotte, the board's only black member who represents the Crenshaw area, said she was angry that every effort to reform Crenshaw had gone nowhere and civil rights was about improving the school: "We have got to change something at Crenshaw for the better."

______

Contact the reporter at http://twitter.com/ChristinaHoag.

Source: http://news.yahoo.com/school-turnarounds-prompt-community-backlash-181037270.html

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