Monday, July 13, 2009

Distruption Toleran Networks (DTN)

"Space Internet" to Link Worlds by 2011?
Brian Handwerk
for National Geographic News
July 9, 2009
For all its might, the World Wide Web is still limited to, well, our world.
But that's quickly changing with the advent of an "interplanetary internet" that planners say will revolutionize space communication.

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The Disruption Tolerant Networking (DTN) system, which entered another phase of testing this week, will allow astronauts to Google from the moon or tweet their observations from space.
But DTN provides far more than a connection to check your email. It's also essential for simplifying space command and control functions—such as power production or life-support systems—crucial for future space initiatives.
"You need an automated communications technology … to sustain planetary exploration on the scale that NASA and others want to perform over the next decade," said Kevin Gifford, a senior research associate at BioServe Space Technologies at the University of Colorado, Boulder.
"DTN enables the transition from a simple point-to-point network, like a walkie-talkie, to a true multimode network like the Internet."
After a decade of development DTN has advanced quickly over the past year, and NASA missions are planning to adopt the network by 2011. In November 2008 NASA test-drove the network by sending space images to and from the EPOXI spacecraft, some 20 million miles (32 million kilometers) from Earth.
DTN protocols were also installed on the International Space Station in May, and summer testing began the first week of July.
Houston, We're Fixing a Problem
Though tweeting astronauts have gotten a lot of press, "the reality is that they [don't really] tweet or have browsing capability on the International Space Station," explained Gifford, who is part of a large, cooperative DTN effort that has also included NASA and Internet veterans.
"Right now they actually voice down a simple blurb, and the tweet is operated manually from Houston," he said. In fact most current space communication involves humans manually scheduling each and every link, sometimes weeks or even months in advance for distant spacecraft, and dictating exactly which data are sent and when.

Adrian Hooke, a veteran of the Apollo 11 mission launch team, manages the new space DTN project.

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"Typically spacecraft go off and do their thing, gather up data, and then on some schedule they connect to the ground and [we] pull down the results of what it has been doing and send up instructions for the next time period," Hooke said.
Such manual operations are inefficient and expensive. But simply extending Earth's Internet into space won't work.
The Web uses Transmission-Control Protocol/Internet Protocol (TCP/IP), a type of communication language in which hosts and computers must be constantly connected.
This rarely happens in space, where intermittent connections are the norm because of the vast distances involved and the tendency of orbiting moons, rotating planets, and drifting satellites to temporarily disrupt wireless lines of communication.
Communications Leap
Typical space delays, even those caused by solar storms, are handled in stride by DTN, Hooke said.
Each node in the network—whether it's the International Space Station or a small orbiting robot—stores all the data it receives until a clear opportunity arises to pass its "bundle" along to the others in the network. DTN nodes do not discard data when a destination path can't be identified.
Hooke likens this "store and forward" process to a basketball team systematically passing the ball downcourt to players closer to the hoop.
The result, he explained, will be a communications leap akin to that between the post office and the telephone.
"A letter is a pretty self-contained story, it says do this or order that, and you mail it off and wait for a response."
But the new DTN system will open a more consistent line of back-and-forth communication.
Edge of the Solar System
DTN is already used for earthbound projects.
Scientists, for instance, are using the system to tag and track wildlife with a data-delivery capacity far more reliable than past satellite-based networks.
DTN can also bring broadband Web to remote areas with few communication structures, connecting remote humans such as the Arctic's Sami people via satellite with far shorter time lags.
The U.S. military has also embraced the technology to help keep lines of communication open in remote areas—or when other infrastructure is destroyed.
So far, DTN doesn't seem to have a catch, experts say.
"There are no physical limits on where the protocols would stop working," Hooke said.
"We could use it to [send messages to] the edges of the solar system—the question is, how long will you wait for a response?" - GGL

Friday, July 10, 2009

San Andreas Ready for Big One?

Mysterious Tremors Detected Along San Andreas Fault
Friday, July 10, 2009

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LOS ANGELES — Scientists have detected a spike in underground rumblings on a section of California's San Andreas Fault that produced a magnitude-7.8 earthquake in 1857.

What these mysterious vibrations say about future earthquakes is far from certain. But some think the deep tremors suggest underground stress may be building up faster than expected and may indicate an increased risk of a major temblor.

Researchers at the University of California, Berkeley, monitored seismic activity on the fault's central section between July 2001 and February 2009 and recorded more than 2,000 tremors. The tremors lasted mere minutes to nearly half an hour.

• Click here to visit FOXNews.com's Natural Science Center.

Unlike earthquakes, tremors occur deeper below the surface and the shaking lasts longer.

During the study period, two strong earthquakes hit — a magnitude-6.5 in 2003 and a magnitude-6.0 a year later. Scientists noticed the frequency of the tremors doubled after the 2003 quake and jumped six-fold after 2004.

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Tremor episodes persist today. Though the frequency of tremors have declined since 2004, scientists are still concerned because they are still at a level that is twice as high as before the 2003 quake.

The team also recorded unusually strong rumblings days before the 2004 temblor.

Results of the research appear in Friday's issue of the journal Science. The work was funded by the U.S. Geological Survey and National Science Foundation.

"The fact that the tremors haven't gone down means the time to the next earthquake may come sooner," said Berkeley seismologist and lead researcher Robert Nadeau.

Nadeau first discovered tremors deep in the San Andreas Fault in 2005. Before that, the phenomenon was thought only to occur in Earth's subduction zones, where one tectonic plate dives beneath another.

USGS seismologist Susan Hough found the latest observations intriguing, but said it's too soon to know what they mean.

"We don't have enough data to know what the fault is doing in the long term," said Hough, who had no part in the research

Thursday, July 9, 2009

Monkey and Grammar

Now I am really embarassed at my bad grammar! - GGL

Monkeys Recognize Poor GrammarMatt Kaplan
for National Geographic News

July 8, 2009
Monkeys can form sentences and speak in accents—and now a new study shows that our genetic relatives can also recognize poor grammar.

"We were really curious whether monkeys could even detect the common trend found in human language to add sounds to word edges, like adding 'ed' in English to create the past tense," said lead study author Ansgar Endress, a linguist at Harvard University.




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Previous research in cotton-top tamarins had shown that the animals can understand basic grammar, for instance, identifying which words logically follow other words in a sentence.

But that same study, published in the journal Science in 2004, found that monkeys did not understand complex grammar, such as when words in a sentence depend on each other but are separated.

While that study suggested monkeys were deaf to complex communication, the new research shows that tamarins can grasp at least one advanced concept: prefixes and suffixes.

Wordplay

For their study, Endress and colleagues played recordings of made-up English words to a population of captive cotton-top tamarins for roughly 30 minutes a day.

Half of the tamarins were exposed to words with a varied stem but a constant suffix (such as bi-shoy, mo-shoy, and lu-shoy). The other half were exposed to a constant prefix followed by a varied stem (such as shoy-bi, shoy-mo, and shoy-lu).

The following day, individual tamarins were brought into an observation enclosure equipped with an audio speaker and video-recording equipment to capture their behavior. These tamarins were then exposed to more words.

Many of the words followed the same language rules that the tamarins had heard the day before, with half hearing "shoy" as a suffix and half hearing it as a prefix.

However, every once in a while, the researchers would play a recording of an "incorrect" word. For instance, the speaker would broadcast "shoy" as a suffix when it had previously been presented as a prefix, or vice versa.

Mental Machinery

Other biologists who were not aware of the research question were asked to watch and note every time the small mammals turned their heads toward the speaker.

When tamarins were exposed to words that "broke" the rules they had learned, they looked toward the speaker in a startled manner, observers noted.

(Related: "Monkeys Can Subtract, Study Finds.")

The finding is dramatic, Endress explained, because it reveals that our distant cousins seem to have the mental machinery to identify verbal structures like suffixes and prefixes.

The research will appear this week in the journal Biology Letters

Tuesday, July 7, 2009

Oldest Bible and Newest Tech

Oldest known Bible goes onlineStory

By Richard Allen Greene

LONDON, England (CNN) -- The world's oldest known Christian Bible goes online Monday -- but the 1,600-year-old text doesn't match the one you'll find in churches today.


The British government bought most of the pages of the ancient manuscript in 1933.

1 of 2 Discovered in a monastery in the Sinai desert in Egypt more than 160 years ago, the handwritten Codex Sinaiticus includes two books that are not part of the official New Testament and at least seven books that are not in the Old Testament.

The New Testament books are in a different order, and include numerous handwritten corrections -- some made as much as 800 years after the texts were written, according to scholars who worked on the project of putting the Bible online. The changes range from the alteration of a single letter to the insertion of whole sentences.

And some familiar -- very important -- passages are missing, including verses dealing with the resurrection of Jesus, they said.

Juan Garces, the British Library project curator, said it should be no surprise that the ancient text is not quite the same as the modern one, since the Bible has developed and changed over the years.

"The Bible as an inspirational text has a history," he told CNN.

"There are certainly theological questions linked to this," he said. "Everybody should be encouraged to investigate for themselves."

That is part of the reason for putting the Bible online, said Garces, who is both a Biblical scholar and a computer scientist.

"Scholars will want to look very closely at it, and some of the Web site functionality is specifically for them -- the ability to search the text, the ability to highlight a word, the degree of detail is particularly interesting for scholars interested in the text," he said.


But, he added, "It's for everyone, really a wide audience, because of curiosity, because they appreciate the value of it."

By the middle of the fourth century, when the Codex Sinaiticus was written, there was wide but not complete agreement on which books should be considered authoritative for Christian communities, according to the Web site where the Codex is posted.

The Bible comes from the Monastery of St. Catherine in the Sinai desert, where a scholar named Constantine Tischendorf recognized its significance in 1844 -- and promptly took part of it, Garces explained.

"Constantine Tischendorf was in search for ancient manuscripts, so he appreciated the age and value of it," Garces said.

He took a handful of pages to Germany to publish them, then returned in 1853 and in 1859 for more. On that last trip, he took 694 pages, which ended up in St. Petersburg, Russia.

The Soviet government decided to sell them in 1933 -- to raise money to buy tractors and other agricultural equipment.

The British government bought the pages for £100,000, raising half the money from the public. Garces called that event one of the first fundraising campaigns in British history.

Film footage from the time shows crowds of people turning out to see the manuscript, which was considered a national treasure, he said.

Though the Bible has been reassembled online, in the real world it remains scattered.

Most of it is in London. Eighty-six pages are held at the University Library in Leipzig, Germany, parts of 12 pages are held at the National Library of Russia in St. Petersburg, and 24 pages and 40 fragments remain at St. Catherine's Monastery, recovered by the monks from the northern wall of the structure in June 1975.

The manuscript contains the Christian Bible in Greek, including the oldest complete copy of the New Testament. (A copy held at the Vatican dates from about the same period.) Older copies of individual portions of the Christian Bible exist, but not as part of a complete text.

The Codex also includes much of the Old Testament that was adopted by early Greek-speaking Christians.

That portion includes books not found in the Hebrew Bible and regarded in the Protestant tradition as apocryphal, such as 2 Esdras, Tobit, Judith, 1 & 4 Maccabees, Wisdom and Sirach.

The New Testament portion includes the Epistle of Barnabas and The Shepherd of Hermas.

As it survives today, Codex Sinaiticus comprises just over 400 large leaves of parchment -- prepared animal skin -- each of which measures 15 inches by 13.6 inches (380 mm by 345 mm).

Thursday, July 2, 2009

Falling into a black hole

It took 100,000 lines of computer code to creat this video! Some people have too much time (and government funding!) on their hands! - GGL

Mississippi Fatties!

Mississippi's Still Fattest but Alabama Closing In

By LAURAN NEERGAARD AP Medical Writer
WASHINGTON July 1, 2009 (AP)


Obesity report shows adults continue to pack on pounds in the U.S.Mississippi's still king of cellulite, but an ominous tide is rolling toward the Medicare doctors in neighboring Alabama: obese baby boomers. It's time for the nation's annual obesity rankings and, outside of fairly lean Colorado, there's little good news. In 31 states, more than one in four adults are obese, says a new report from the Trust for America's Health and the Robert Wood Johnson Foundation.

And obesity rates among adults rose in 23 states over the past year, and no state experienced a significant decline.

"The obesity epidemic clearly goes beyond being an individual problem," said Jeff Levi, executive director of the Trust, a nonprofit public health group.

It's a national crisis that "calls for a national strategy to combat obesity," added Robert Wood Johnson vice president Dr. James Marks. "The crest of the wave of obesity is still to crash."

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The report provides one of the first in-depth looks at obese boomers, and its implications are sobering. This first wave of aging boomers will mean a jump of obese Medicare patients that ranges from 5.2 percent in New York to a high of 16.3 percent in Alabama, the report concluded. In Alabama, nearly 39 percent of the oldest boomers are obese.

Bikini Clad Babes Control Men's Minds

Like who DIDN'T know that! (But ladies, it isn't our fault, it is our genes!)



Men see bikini-clad women as objects, psychologists say


By Elizabeth Landau
CNN



CHICAGO, Illinois (CNN) -- It may seem obvious that men perceive women in sexy bathing suits as objects, but now there's science to back it up.

Images of women in bikinis prompted brain responses in men associated with using tools.

New research shows that, in men, the brain areas associated with handling tools and the intention to perform actions light up when viewing images of women in bikinis.
The research was presented this week by Susan Fiske, professor of psychology at Princeton University, at the annual meeting of the American Association for the Advancement of Science.
"This is just the first study which was focused on the idea that men of a certain age view sex as a highly desirable goal, and if you present them with a provocative woman, then that will tend to prime goal-related responses," she told CNN.
Although consistent with conventional wisdom, the way that men may depersonalize sexual images of women is not entirely something they control. In fact, it's a byproduct of human evolution, experts say. The first male humans had an incentive to seek fertile women as the means of spreading their genes.
"They're not fully conscious responses, and so people don't know the extent to which they're being influenced," Fiske said. "It's important to recognize the effects."
The participants, 21 heterosexual male undergraduates at Princeton, took questionnaires to determine whether they harbor "benevolent" sexism, which includes the belief that a woman's place is in the home, or hostile sexism, a more adversarial viewpoint which includes the belief that women attempt to dominate men.
In the men who scored highest on hostile sexism, the part of the brain associated with analyzing another person's thoughts, feelings and intentions was inactive while viewing scantily clad women, Fiske said. Visit CNNHealth.com, your connection for better living
Men also remember these women's bodies better than those of fully-clothed women, Fiske said. Each image was shown for only a fraction of a second.
This study looked specifically at men, and did not test women's responses to similar images.
A supplementary study on both male and female undergraduates found that men tend to associate bikini-clad women with first-person action verbs such as I "push," "handle" and "grab" instead of the third-person forms such as she "pushes," "handles" and "grabs." They associated fully clothed women, on the other hand, with the third-person forms, indicating these women were perceived as in control of their own actions. The females who took the test did not show this effect, Fiske said.
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That goes along with the idea that the man looking at a woman in a bikini sees her as the object of action, Fiske said.
The findings are consistent with previous work in the field, and resonate, for example, with the abundance of female strip clubs in comparison to male strip clubs, said Dr. Charles Raison, psychiatrist and director of the Mind/Body Institute at Emory University in Atlanta, Georgia. Raison was not involved in the study.
Previous research found that people tend to similarly dehumanize those who are homeless or drug addicts, although the phenomenon in this case is somewhat different, Fiske said. People have reactions of avoidance toward the homeless and drug addicts, and the opposite for scantily clad women.
The broader purpose of the research was to explore circumstances under which people treat one another as the means to an end, Fiske said.
Past studies have also shown that when men view images of highly sexualized women, and then interact with a woman in a separate setting, they are more likely to have sexual words on their minds, she said. They are also more likely to remember the woman's physical appearance, and sit closer to her -- for instance, at a job interview.
Taken together, the research suggests that viewing certain images is not appropriate in the workplace, Fiske said.
"I'm not advocating censorship, but I do think people need to know what settings should discourage the display and possession of these kinds of things," she said.
Both women and men have something to learn from this line of research, Raison said. Women should be aware of how they are perceived when wearing provocative clothing, and men shouldn't let feelings of impersonal sexual longing interfere with their more personal relationships with other women, including female friends. "Many men make foolish choices because of sexual attraction," he said.
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"The suggestion might be that there's some hard-wiring there that can interfere with the average man's ability to interact on deeper levels with really hot looking stranger women in bikinis," he said.
Women may also depersonalize men in certain situations, but published research on the subject has not been done, experts say. Evolutionary psychology would theorize that men view women as objects in terms of their youth and apparent fertility, while women might view men as instrumental in terms of their status and resources, Fiske said.
Another avenue to explore would be showing images of men's wives and girlfriends in bikinis, Raison said. He predicts the objectifying effect would not happen in this context