Pictures: Civil War Shipwreck Revealed by Sonar

Photograph by Jesse Cancelmo

A fishing net, likely only decades old, drapes over machinery that once connected the Hatteras' pistons to its paddle wheels, said Delgado.

From archived documents, the NOAA archaeologist learned that Blake, the ship's commander, surrendered as his ship was sinking. "It was listing to port, [or the left]," Delgado said. The Alabama took the wounded and the rest of the crew and put them in irons.

The officers were allowed to keep their swords and wander the deck as long as they promised not to lead an uprising against the Alabama's crew, he added.

From there, the Alabama dropped off their captives in Jamaica, leaving them to make their own way back to the U.S.

Delgado wants to dig even further into the crew of the Hatteras. He'd like see if members of the public recognize any of the names on his list of crew members and can give him background on the men.

"That's why I do archaeology," he said.

(Read about other Civil War battlefields in National Geographic magazine.)

Published January 11, 2013

Read More..

Today on New Scientist: 11 January 2013







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Muscle mimic pulls electricity from wet surface

A plastic film that repeatedly curls up and flips over when wet could power devices in remote areas or sensors embedded in sweaty clothing




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Native leaders meet with Canadian PM amid protests






OTTAWA: Indigenous Canadians marched on the capital and other major cities threatening to bring the economy "to its knees" as their leaders met with officials to try to resolve a row over extreme poverty on reserves.

As many as 500 aboriginals protested in freezing rain outside parliament in Ottawa in support of a hunger strike by a northern Ontario chief. Hundreds more held rallies in Montreal and Winnipeg.

Canadian Prime Minister Stephen Harper, meanwhile, met with 20 native chiefs behind closed doors in a bid to stem an escalation of demonstrations and highway blockades across the country.

Aboriginal Affairs Minister John Duncan said after the meeting that the prime minister agreed to ongoing "high level dialogue on the treaty relationship".

But beyond this commitment it was unclear at the end of the day what, if anything, was accomplished except to highlight divisions among Canada's more than 600 tribes.

Attawapiskat Chief Theresa Spence, whose 32-day hunger strike has become a focal point for an aboriginal rights movement calling for improved living conditions on reserves, boycotted the emergency talks.

She and her supporters had insisted on the participation of Queen Elizabeth II's representative in Canada, Governor General David Johnston, describing his attendance as "integral when discussing inherent and treaty rights". Canada's more than 600 indigenous reserves were created by royal proclamation in 1763.

But Johnston declined, saying their plight is a political matter that must be taken up with elected officials.

"We're giving this opportunity for them to resolve the broken promises from the treaty. And all we're asking is a meeting and to sit down with them," Spence told a news conference earlier in the day.

"All we want is justice, equality and fairness which we're entitled (to)," she said, vowing to continue her hunger strike.

Chiefs from Manitoba and Ontario provinces, as well as the Northwest Territories, joined her boycott, insisting on a meeting with the prime minister on their terms and vowing to "bring the Canadian economy to its knees" if their demands were not met.

This could include blocking resource development on their ancestral lands, said Manitoba Grand Chief Derek Nepinak.

"We have the warriors that are standing up now, that are willing to go that far. So we're not here to make requests, we're here to demand attention," he said.

Nepinak was echoed by Grand Chief Gordon Peters of the Association of Iroquois and Allied Indians who called for protests to be stepped up with all major road and rail lines shut down.

Foreign investments in Canada not approved by First Nations could also be targeted, he told reporters.

Assembly of First Nations National Chief Shawn A-in-chut Atleo, after leading a delegation to meet with Harper, avoided speaking to reporters.

Ahead of the talks he said he would seek a commitment from the prime minister for a "long-term process" to address native concerns, including outstanding land claims, hundreds of missing and murdered native women, high unemployment among natives, and too few schools in native communities.

A fix, Atleo said, could also include natives getting a share of royalties from some C$650 billion in resource development planned for the coming decade.

In addition to complaints of severe poverty, natives also blasted changes last month to environmental and other laws they say impact their hunting and fishing rights, which allow tribes to lease reserve lands to non-natives.

Although the government insists the latter was meant to boost economic development, some fear it will result in a loss of native control of reserve lands and eventually lead to the end of aboriginal communities.

- AFP/al



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White House shoots down petition to build Death Star



No Death Star for you.



(Credit:
Daniel Terdiman/CNET)



The White House has rejected a proposal to build a Death Star, saying that in addition to its prohibitive construction costs, the current administration does not advocate destroying other planets.


Today's official statement came in response to a petition posted in November to the White House's We The People platform that called for the administration to begin construction of a moon-size military battlestation armed with a planet-destroying superlaser by 2016. The petition, which attracted well more than the minimum 25,000 signatures necessary for a response from the White House, suggested such a project could give the nation's economy a much-needed boost. The petition


By focusing our defense resources into a space-superiority platform and weapon system such as a Death Star, the government can spur job creation in the fields of construction, engineering, space exploration, and more, and strengthen our national defense.


However, in a playful, "Star Wars"-inspired response titled "This Isn't the Petition Response You're Looking For," Paul Shawcross, the chief of the science and space branch at the White House Office of Management and Budget, explains that construction of the universe's ultimate weapon would cost $850 quadrillion ($850,000,000,000,000,000). The administration also said it was reluctant to spend such an uncountable amount on "a Death Star with a fundamental flaw that can be exploited by a one-man starship."


Shawcross also points out that the U.S. is a participant in the International Space Station ("that's no moon, it's a Space Station!" he writes:


Yes, we already have a giant, football field-sized International Space Station in orbit around the Earth that's helping us learn how humans can live and thrive in space for long durations. The Space Station has six astronauts -- American, Russian, and Canadian -- living in it right now, conducting research, learning how to live and work in space over long periods of time, routinely welcoming visiting spacecraft and repairing onboard garbage mashers, etc. We've also got two robot science labs -- one wielding a laser -- roving around Mars, looking at whether life ever existed on the Red Planet.


Shawcross also points out that exploration of space is no longer a government-only industry and that private companies are already ferrying cargo into space under NASA's Commercial Crew and Cargo Program Office (aka C3PO). He also offered a reminder of some of the space-exploration projects currently under way or on the drawing board.


Even though the United States doesn't have anything that can do the Kessel Run in less than 12 parsecs, we've got two spacecraft leaving the solar system and we're building a probe that will fly to the exterior layers of the sun. We are discovering hundreds of new planets in other star systems and building a much more powerful successor to the Hubble Space Telescope that will see back to the early days of the universe.

Shawcross closes the administration's response with serious note encouraging students to pursue careers in science, technology, engineering, or math-related fields and highlighting the science fairs and White House astronomy sessions initiated by the Obama Administration.


"If you do pursue a career in a science, technology, engineering or math-related field, the Force will be with us!" Shwacross writes. "Remember, the Death Star's power to destroy a planet, or even a whole star system, is insignificant next to the power of the Force."

Read More..

Pictures: Civil War Shipwreck Revealed by Sonar

Photograph by Jesse Cancelmo

A fishing net, likely only decades old, drapes over machinery that once connected the Hatteras' pistons to its paddle wheels, said Delgado.

From archived documents, the NOAA archaeologist learned that Blake, the ship's commander, surrendered as his ship was sinking. "It was listing to port, [or the left]," Delgado said. The Alabama took the wounded and the rest of the crew and put them in irons.

The officers were allowed to keep their swords and wander the deck as long as they promised not to lead an uprising against the Alabama's crew, he added.

From there, the Alabama dropped off their captives in Jamaica, leaving them to make their own way back to the U.S.

Delgado wants to dig even further into the crew of the Hatteras. He'd like see if members of the public recognize any of the names on his list of crew members and can give him background on the men.

"That's why I do archaeology," he said.

(Read about other Civil War battlefields in National Geographic magazine.)

Published January 11, 2013

Read More..

CDC: Flu Outbreak Could Be Waning













The flu season appears to be waning in some parts of the country, but that doesn't mean it won't make a comeback in the next few weeks, according to the Centers for Disease Control and Prevention.


Five fewer states reported high flu activity levels in the first week of January than the 29 that reported high activity levels in the last week of December, according to the CDC's weekly flu report. This week, 24 states reported high illness levels, 16 reported moderate levels, five reported low levels and one reported minimal levels, suggesting that the flu season peaked in the last week of December.


"It may be decreasing in some areas, but that's hard to predict," CDC Director Dr. Thomas Frieden said in a Friday morning teleconference. "Trends only in the next week or two will show whether we have in fact crossed the peak."


The flu season usually peaks in February or March, not December, said Dr. Jon Abramson, who specializes in pediatric infectious diseases at Wake Forest Baptist Health in North Carolina. He said the season started early with a dominant H3N2 strain, which was last seen a decade ago, in 2002-03. That year, the flu season also ended early.


Click here to see how this flu season stacks up against other years.






Cheryl Evans/The Arizona Republic/AP Photo













Increasing Flu Cases: Best Measures to Ensure Your Family's Health Watch Video







Because of the holiday season, Frieden said the data may have been skewed.


For instance, Connecticut appeared to be having a lighter flu season than other northeastern states at the end of December, but the state said it could have been a result of college winter break. College student health centers account for a large percentage of flu reports in Connecticut, but they've been closed since the fall semester ended, said William Gerrish, a spokesman for the state's department of public health.


The flu season arrived about a month early this year in parts of the South and the East, but it may only just be starting to take hold of states in the West, Frieden said. California is still showing "minimal" flu on the CDC's map, but that doesn't mean it will stay that way.


Click here to read about how flu has little to do with cold weather.


"It's not surprising. Influenza ebbs and flows during the flu season," Frieden said. "The only thing predictable about the flu is that it is unpredictable."


Dr. William Schaffner, chair of preventive medicine at Vanderbilt University Medical Center in Nashville, Tenn., said he was expecting California's seeming good luck with the flu to be over this week.


"Flu is fickle, we say," Schaffner said. "Influenza can be spotty. It can be more severe in one community than another for reasons incompletely understood."


Early CDC estimates indicate that this year's flu vaccine is 62 percent effective, meaning people who have been vaccinated are 62 percent less likely to need to see a doctor for flu treatment, Frieden said.


Although the shot has been generally believed to be more effective for children than adults, there's not enough data this year to draw conclusions yet.


"The flu vaccine is far from perfect, but it's still by far the best tool we have to prevent flu," Frieden said, adding that most of the 130 million vaccine doses have already been administered. "We're hearing of shortages of the vaccine, so if you haven't been vaccinated and want to be, it's better late than never."



Read More..

Muscle mimic pulls electricity from wet surface











































Electricity has been squeezed from a damp surface for the first time, thanks to a polymer film that curls up and moves – a bit like an artificial muscle – when exposed to moisture. The film could be used to run small, wearable devices on nothing but sweat, or in remote locations where conventional electricity sources aren't available.












When a dry polymer absorbs water, its molecular structure changes. This can, in principle, be converted into larger-scale movement, and in turn electricity. But previous attempts at creating a material powered by a moisture gradient – the difference in chemical potential energy between a wet region and a dry region - failed to produce a useful level of force.












These unsuccessful tries used a polymer called polypyrrole. Now Robert Langer and colleagues at the Massachusetts Institute of Technology have turned to the material again, embedding chains of it within another material, polyol-borate. This more complex arrangement mimics structures found in muscles as well as in plant tissues that bend in response to changes in humidity.











Flipping film













The result looks like an ordinary piece of thin black plastic, but when placed on a wet surface, something extraordinary happens. As the material absorbs water, its end curls away from the surface and the film becomes unstable, so it flips over. The ends have now dried out, so they are ready to absorb more water, and the whole process repeats itself. This continuous flipping motion lets the film travel across a suitably moist surface unaided.












Langer found that a 0.03-millimetre-thick strip, weighing roughly 25 milligrams, could curl up and lift a load 380 times its mass to a height of 2 millimetres. It was also able to move sideways when carrying a load about 10 times its mass.












To extract energy from this effect, Langer's team added a layer of piezoelectric material – one which produces electricity when squeezed. When this enhanced film, weighing about 100 milligrams, flipped over, it generated an output of 5.6 nanowatts – enough to power a microchip in sleep mode.











Electricity from sweat













Though the output is small, it is proof that electricity can be extracted from a water gradient. "To the extent of our knowledge, we are the first to utilise a water gradient, without a pressure gradient, to generate electricity," says Langer.












Large-scale energy harvesting is unlikely as the size of the device needed would be impractical, but it could be used to power small devices such as environmental monitoring systems in remote locations. "It will be interesting for applications where the amount of energy needed may be low but where access to energy may be difficult," says Peter Fratzl at the Max-Planck Institute of Colloids and Interfaces in Potsdam, Germany, who was not involved in the work.












Another application, Langer suggests, would be to place the film inside the clothing of joggers or athletes. The evaporation of sweat could generate enough electricity to power sensors monitoring blood pressure and heart rate.












Journal reference: Science, DOI 10.1126/science.1230262


















































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Fiji's military ruler drops draft constitution






SUVA: Fiji's military government has announced it will dump a draft constitution prepared by an academic panel and prepare its own version, a move New Zealand labelled a "backward step" for the Pacific nation.

Military leaders in the coup-plagued island state commissioned a panel led by Kenyan academic Yash Ghai to draw up a constitution last year but took issue with some recommendations put forward in the document.

President Ratu Epeli Nailatikau said Ghai's blueprint risked reigniting racial tensions in Fiji, where divisions exist between the indigenous population and ethnic Indians brought to the country in the colonial era.

He said it also threatened to undo reforms introduced by Prime Minister Voreqe Bainimarama, who seized power in a 2006 coup and has pledged to hold elections in 2014 after the new constitution has been adopted.

"The Ghai draft (constitution ) can lead to financial and economic catastrophe and ruin," Nailatikau said in a nationally televised address on Thursday night.

While the draft has not been officially released, leaked copies indicate Ghai wanted the military, a key player in the four coups the Pacific nation has endured since 1987, to stay out of politics after the 2014 elections.

He also called for a transitional government to take over ahead of the 2014 vote, meaning Bainimarama would have to cede power.

New Zealand Foreign Minister Murray McCully said the government had effectively "trashed" the work of Ghai's Constitutional Commission, which completed its draft after receiving more than 7,000 public submissions.

He said the international community would be watching closely to ensure the new constitution allowed for free and fair elections, rather than providing a blueprint for the military's version of democracy.

"This is not flash, it's a backward step of some proportions," McCully told Radio New Zealand.

"But it's been the history of this whole process. This is not going to be a simple straight line towards elections and international credibility, there are always going to be steps forward and steps back."

He added that the move by the military to draw up its own draft constitution was "rather larger a step back than any of us feel comfortable with, but it's what we've got to work with".

The new draft constitution is expected to be completed by the end of the month.

- AFP/al



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NASA deems Earth safe from massive asteroid strike in 2036



Asteroid Apophis was discovered in 2004 but NASA scientists have ruled out the possibility of it hitting Earth in 2036.



(Credit:
UH/IA )


Earthlings can breathe a sigh of relief; NASA scientists have officially ruled out the possibility of the 22 million ton asteroid Apophis smashing into the planet in 2036.

"The impact odds as they stand now are less than one in a million, which makes us comfortable saying we can effectively rule out an Earth impact in 2036," manager of NASA's Near-Earth Object Program Office Don Yeomans said in a statement. "Our interest in asteroid Apophis will essentially be for its scientific interest for the foreseeable future."

Apophis is still en route to come exceedingly close to Earth in 2029, however. According to NASA scientists, the asteroid will make history with the closest flyby of an asteroid its size when it grazes the planet's atmosphere at 19,400 miles above Earth's surface.

Initially, when discovered in 2004, scientists feared that Apophis would collide with the Earth in 2029. First calculations of the asteroid's orbit gave it a 2.7 percent chance of crashing into the planet. After new data discoveries in 2007, however, scientists ruled out the possibility of a 2029 collision scenario.

Still, the possibility of a 2036 impact remained. NASA scientists have been hard at work ever since trying to figure out the possibility of Apophis, which is the size of three-and-a-half football fields, hitting the Earth. Using information from both ground and space-based telescopes in 2011 and 2012, as well as data from the asteroid's distant flyby yesterday, they've finally concluded the planet is safe.

For those asteroid gazers, a lesser-known 131-foot asteroid called 2012 DA14 is expected to speed past the planet in the middle of February. This one could come as close as 17,200 miles above the Earth's surface.

"With new telescopes coming online, the upgrade of existing telescopes and the continued refinement of our orbital determination process, there's never a dull moment working on near-Earth objects," Yeomans said.

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Google and Twitter Help Track Influenza Outbreaks


This flu season could be the longest and worst in years. So far 18 children have died from flu-related symptoms, and 2,257 people have been hospitalized.

Yesterday Boston Mayor Thomas Menino declared a citywide public health emergency, with roughly 700 confirmed flu cases—ten times the number the city saw last year.

"It arrived five weeks early, and it's shaping up to be a pretty bad flu season," said Lyn Finelli, who heads the Influenza Outbreak Response Team at the Centers for Disease Control and Prevention (CDC).

Boston isn't alone. According to the CDC, 41 states have reported widespread influenza activity, and in the last week of 2012, 5.6 percent of doctor's office visits across the country were for influenza-like illnesses. The severity likely stems from this year's predominant virus: H3N2, a strain known to severely affect children and the elderly. Finelli notes that the 2003-2004 flu season, also dominated by H3N2, produced similar numbers. (See "Are You Prepped? The Influenza Roundup.")

In tracking the flu, physicians and public health officials have a host of new surveillance tools at their disposal thanks to crowdsourcing and social media. Such tools let them get a sense of the flu's reach in real time rather than wait weeks for doctor's offices and state health departments to report in.

Pulling data from online sources "is no different than getting information on over-the-counter medication or thermometer purchases [to track against an outbreak]," said Philip Polgreen, an epidemiologist at the University of Iowa.

The most successful of these endeavors, Google Flu Trends, analyzes flu-related Internet search terms like "flu symptoms" or "flu medication" to estimate flu activity in different areas. It tracks flu outbreaks globally.

Another tool, HealthMap, which is sponsored by Boston Children's Hospital, mines online news reports to track outbreaks in real time. Sickweather draws from posts on Twitter and Facebook that mention the flu for its data.

People can be flu-hunters themselves with Flu Near You, a project that asks people to report their symptoms once a week. So far more than 38,000 people have signed up for this crowdsourced virus tracker. And of course, there's an app for that.

Both Finelli, a Flu Near You user, and Polgreen find the new tools exciting but agree that they have limits. "It's not as if we can replace traditional surveillance. It's really just a supplement, but it's timely," said Polgreen.

When people have timely warning that there's flu in the community, they can get vaccinated, and hospitals can plan ahead. According to a 2012 study in Clinical Infectious Diseases, Google Flu Trends has shown promise predicting emergency room flu traffic. Some researchers are even using a combination of the web database and weather data to predict when outbreaks will peak.

As for the current flu season, it's still impossible to predict week-to-week peaks and troughs. "We expect that it will last a few more weeks, but we can never tell how bad it's going to get," said Finelli.

Hospitals are already taking precautionary measures. One Pennsylvania hospital erected a separate emergency room tent for additional flu patients. This week, several Illinois hospitals went on "bypass," alerting local first responders that they're at capacity—due to an uptick in both flu and non-flu cases—so that patients will be taken to alternative facilities, if possible.

In the meantime, the CDC advises vaccination, first and foremost. On the bright side, the flu vaccine being used this year is a good match for the H3N2 strain. Though Finelli cautions, "Sometimes drifted strains pop up toward the end of the season."

It looks like there won't be shortages of seasonal flu vaccine like there have been in past years. HealthMap sports a Flu Vaccine Finder to make it a snap to find a dose nearby. And if the flu-shot line at the neighborhood pharmacy seems overwhelming, more health departments and clinics are offering drive-through options.


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