Monday, December 05, 2005

news 12-05-05

COOL FREE WAY TO CREATE ONLINE LEARNING SITUATIONS:


Red Cross mulls 'neutral' emblem

In Geneva diplomats from the 192 countries which have signed the Geneva conventions are meeting to discuss a third emblem for the international Red Cross.  Red Cross officials hope approval of a third emblem will finally put an end to decades of controversy over the issue.  At the moment, the only two emblems recognised under the Geneva conventions are the red cross and the red crescent; relief workers and ambulances bearing these symbols are protected under international law.  In war zones or disaster regions, they must be granted free access to people in need of help.  Over the years, a number of countries have applied to have their own distinctive emblems recognised, but all have been refused. Francois Bugnion, director of international law with the International Committee of the Red Cross (ICRC), believes too many emblems could compromise protection.  "Hundreds of emblems would mean they would not be recognised, and so they would not be respected", he explains.  "They would be identified with different countries, so instead of conveying the message 'this is an ambulance, this is neutral and must be respected', it would be a sign of identification which would run against the objective of the protective symbol."  Red Star of David  One country in particular, however, refuses to use either the red cross or the red crescent.  Israel's Magen David Adom Society (MDA) uses the unrecognised red star of David as its emblem. As a result, the society is still not a member of the international Red Cross movement, something which many Israelis see as unjust.

http://tinyurl.com/blg8t




The tech inside Cirque's big tent

SAN FRANCISCO--It's six hours before a performance of the new Cirque du Soleil show, "Corteo," and backstage, computers are controlling a series of dollies hanging from two giant arched tracks bridging the stage.  Hanging from the dollies are three massive chandeliers from which acrobats are practicing gyrations and twists.  The dollies are the kind of rigging gear seen in just about any circus or theater with acts that require people or props to be elevated far above the ground. But the system running the dollies' deployment--a crucial element of the show, since nearly every act involves one or more performers flying or leaping high into the air--is entirely automated, something that would have been unheard of to Cirque du Soleil's progenitors and that is rare even in some of the Cirque's other shows.

http://tinyurl.com/75pmq




Growing pains for Wikipedia

For Wikipedia founder Jimmy Wales, last week was a tough one. And he's going to change the ground rules for the popular anyone-can-contribute encyclopedia because of it.  First, in a Nov. 29 op-ed piece in USA Today, a former administrative assistant to Robert Kennedy lambasted the free online reference work for an article that suggested he may have been involved in the assassinations of both Robert F. Kennedy and John F. Kennedy.  Then, on Dec. 1, a new flurry of attention came when former MTV VJ and podcasting pioneer Adam Curry was accused of anonymously editing out references to other people's seminal podcasting work in an article about the hot new digital medium.  To critics of Wikipedia--which, in a spin on the open-source model, lets anyone create and edit entries--the news was further proof that the service has no accountability and no place in the world of serious information gathering.

http://tinyurl.com/7cxke






GE Helps Centerpoint(1) Develop New Translucent Home Roofing System for Enhanced Aesthetics, Comfort & Energy Efficiency; Technology allows full spectrum, natural light into living spaces  PITTSFIELD, Mass.--(BUSINESS WIRE)--Dec. 1, 2005--GE - Plastics today announced that it will be assisting Centerpoint(1) Translucent Systems, LLC - a manufacturer and distributor of residential roofing products - to develop a new translucent roofing system that provides full-spectrum, natural light, and significantly improved aesthetics, comfort, and energy efficiency for the residential new-construction market. Centerpoint will build the new systems using GE's Lexan(2) Thermoclear(2) multiwall polycarbonate (PC) sheet - a material based on GE's tough, virtually unbreakable Lexan resin - in combination with Nanogel(3) translucent aerogel from Cabot Corporation. 

http://tinyurl.com/c97qv




Car Paint Changes With Temperature

PlayfullyClever writes "It's now common to build materials which can change colors depending on their surrounding environment because of progresses made in colloid chemistry. But now, German researchers have gone a step further. They've used ion bombardment and gold metallisation to produce new particles whose bonding behavior can be chemically tailored. This could lead to new shimmering car finishes which can change with temperature or humidity, new cosmetics, but more importantly, to new applications in optical data processing"




Nissan develops self-repairing paint

(link to this article)

December 3, 2005 Nissan has developed the world’s first clear paint that repairs scratches on painted car surfaces, including scratches from car-washing machines, off-road driving and fingernails. “Scratch Guard Coat” contains a newly developed high elastic resin that helps prevent scratches from affecting the inner layers of a car’s painted surface. With “Scratch Guard Coat” a car’s scratched surface will return to its original state anywhere from one day to a week, depending on temperature and the depth of the scratch.

http://tinyurl.com/dmodd





Promise of fuel cells turns out to be Fool's Gold 
AS the Consumer Electronics Show (CES) approaches, there are five computer technologies goodies I am really hoping and praying to see work – as in, built in working pre-production devices that will turned into real, on-my-Big-Box shelf gadgets by the 2006 holiday shopping season. Preferably before December 2006, thank you very much. I don't want to see breadboard gizmos or way-cool "engineering prototypes" that will take another two years to field. I want real things that I can spend real money on.




Danish Researchers Develop Hydrogen Tablet

We all know we want to be cruising in hydrogen cars, but there are some safety issues associated with a vehicle whose fuel tank amounts to a powerful bomb of highly compressed hydrogen. Now, Danish scientists have made what they say may be an important step in the direction of safe and inexpensive hydrogen storage. Developed at the Technical University of Denmark, a new hydrogen tablet chemically stores hydrogen in a safe, solid form. The tabled consists of ammonia absorbed in sea salt. Ammonia is produced by a combination of hydrogen with nitrogen from the surrounding air, and the tablet therefore contains large amounts of hydrogen. A chemical catalyst releases the hydrogen when needed. Scientists claim the hydrogen tablet is so safe is could be carried in your pocket. :: DTU

http://tinyurl.com/8vbw3




Hydrogen-Emitting Microbe Examined

Concerned Onlooker wrote to mention an article at Science Daily discussing a microbe that lives in volcanic environments, which emits Hydrogen gas as a waste product. "As the world increasingly considers hydrogen as a potential biofuel, technology could benefit from having the genomes of such microbes. 'C. hydrogenoformans is one of the fastest-growing microbes that can convert water and carbon monoxide to hydrogen," remarks TIGR evolutionary biologist Jonathan Eisen, senior author of the PLoS Genetics study. "So if you're interested in making clean fuels, this microbe makes an excellent starting point.'"

http://tinyurl.com/8qbfp




Stratospheric airship reaches near-space altitude during demonstration flight

(link to this article)

December 4, 2005 A team led by Southwest Research Institute (SwRI) successfully demonstrated powered flight of the HiSentinel stratospheric airship at an altitude of 74,000 feet. The development team of Aerostar International, the Air Force Research Laboratory (AFRL) and SwRI launched the airship from Roswell, N.M., for a five-hour technology demonstration flight. The 146-foot-long airship carried a 60-pound equipment pod and propulsion system when it became only the second airship in history to achieve powered flight in the stratosphere.

http://tinyurl.com/dxs84




Bees Recognize Human Faces

By Katherine Unger
ScienceNOW Daily News
2 December 2005

Think all bees look alike? Well we don't all look alike to them, according to a new study that shows honeybees, who have 0.01% of the neurons that humans do, can recognize and remember individual human faces.
For humans, identifying faces is critical to functioning in everyday life. When we look at another person's face, a special brain region, the fusiform gyrus, lights up (ScienceNOW 14 February, 2004). But can animals without such a specialized region also tell one face from another?



Why lost weight can creep back on
Scientists have discovered why it is often harder to keep weight off than to lose it in the first place.
A team at New York's Columbia University has shown the key is falling levels of the hormone leptin, which controls appetite.
They found that giving people who had recently lost weight injections of the hormone helped them to avoid putting the pounds straight back on. The study features in the Journal of Clinical Investigation.




Drinking small amounts of alcohol regularly reduces risk of obesity

People who drink small amounts of alcohol regularly are less likely to be obese than people who do not drink at all. A study published today in the open access journal BMC Public Health shows that consuming no more than a drink or two a few times a week reduces the risk of being obese. Consuming four or more drinks per day, however, increases the risk of being obese by 46%.
Ahmed Arif, from Texas Tech University Health Sciences Center, in Lubbock, USA and James Rohrer, from Mayo Clinic, Rochester, USA, analysed the results of the National Health and Nutrition Examination Survey III in a subset of 8,236 non-smoker respondents. The respondents had all filled a questionnaire about their drinking habits and their body mass index (BMI) had been measured.



Concerns over IVF contamination risk

Some children conceived by a common IVF method could be carrying chunks of bacterial DNA in their chromosomes, finds a study in mice

SOME children conceived by a common method of IVF could be carrying chunks of bacterial DNA in their chromosomes, according to a study in mice. The researchers who conducted the work say that such accidental genetic modification would be very rare, but they argue that fertility doctors should take more precautions to exclude it.

Intracytoplasmic sperm injection, or ICSI, is used to help would-be fathers with very low sperm counts or sperm that cannot swim normally. Rather than mixing sperm and eggs in a culture dish as in conventional IVF, technicians take individual sperm and inject them into a woman's eggs. ICSI has been growing in popularity since its debut in 1991, and now accounts for around half of the IVF procedures in many countries, including the UK and the US.

Over the past five years, researchers have experimented with using ICSI to make genetically modified animals by mixing DNA ...

http://tinyurl.com/dd5f7



Pregnancy drug can affect grandkids too

A drug often given to pregnant women to help their babies mature enough to survive can have effects on the subsequent generation, a guinea pig study finds

DOCTORS treating a woman at risk of having a premature baby may inadvertently be affecting her future grandchildren as well. A study in guinea pigs suggests that a drug commonly given to pregnant women to help their babies mature enough to survive can also affect the brains and behaviour of their grandchildren too. The finding raises a difficult dilemma for doctors, for while the drug undoubtedly saves lives, its side effects could last for generations.

Babies normally spend 40 weeks in the womb, but some can survive even if they are born 15 or 16 weeks early. However, their lungs lack enough of a substance called a surfactant to breathe unassisted. So since the 1970s, doctors have been injecting women at risk of having a very premature baby with synthetic glucocorticoid drugs, such as betamethasone, which hasten the development of a fetus's lungs.

A single dose cuts the death rate ...

http://tinyurl.com/8fsek




[Also useful on this world, for say.... building refugee cities]

Robots aim to explore and build on other worlds

NASA is offering two new $250,000 prizes to stimulate advances in the use of robots in planetary exploration and automated construction.

One, called the Telerobotic Construction Challenge, aims to promote the development of semi-autonomous robots that can build complicated structures with minimal remote guidance from human controllers.

The challenge will require robots to assemble structures out of building blocks strewn around an arena. Human controllers will only be able to see the arena using sensors on the robots and any commands they send will be subject to delays – just as they would if the robots were on the Moon.

The competition "may directly affect how exploration is conducted on the Moon", says Scott Horowitz, associate administrator for NASA's exploration systems mission directorate. "If the challenge can successfully demonstrate the remote assembly of simple and complex structures, many aspects of exploration in general will be affected for the better."

http://tinyurl.com/bz2e8




SPEAKING OF.....

miniHome: The Green Prefab Modern Trailer

For those who wonder why Treehugger likes modern prefab so much, here is the answer. We think people can live with less and don't need so much space. We think prefabrication generates less waste and more opportunities for greener construction methods and technologies. We think traditional land development restricts peoples choices and costs too much money. We think the miniHome is just about the best answer to the question that we have seen anywhere. Ever.

http://tinyurl.com/8m82d




I want One:

The Rider: An Electric Commuter Trike

Somehow we missed this one. An electric commuter vehicle that folds up (see extended post) not bigger than an umbrella. Okay, at 14 kg (31 lb) it might be a tad heavier, but can your brolly transport you around town at 15 kph (9.5mph) for 4 hours (4 hrs)? Even Mary Poppins would’ve been impressed. The removable 24v battery slips between a fork in the handlebars, the electric motor drives the front wheel, and it boasts regenerative braking, though this may not make it from prototype to production model. Conceived as complementary transport to buses and trains, the Rider’s Israeli designer, Elisha Wetherhorn, is seeking support to bring this cool design to a street near you. Oh yeah, and it carves (leans) as you corner to add a little buzz to your commute. Top pic from Core77. Elisha can be contacted via ::The Rider

http://tinyurl.com/7f43o





Three Good Reasons for a National Sales Tax

Scott Burns of the Dallas Morning News offer three good reasons to support a national sales tax (also know as the Fair Tax) to replace the current income tax system.

http://tinyurl.com/89fqr




Feeling old?

Supplement diet with leucine prevents muscle loss linked to ageing

Muscle in adults is constantly being built and broken down. As young adults we keep the two processes in balance, but when we age breakdown starts to win. However, adding the amino acid leucine to the diet of old individuals can set things straight again. This is the finding of research performed by Lydie Combaret, Dominique Dardevet and colleagues at the Human Nutrition Research Centre of Auvergne, INRA, Clermont-Ferrand, France.
After the age of 40, humans start loosing muscle at around 0.5–2% per year. Immediately after a meal degradation of protein slows down and synthesis doubles. This process is triggered by the arrival of a plentiful supply of amino acids. In older animals this stimulus is less effective; synthesis slows down, and previous work also suggests that breakdown may be affected. While adding leucine to the diet restores protein building there was no knowledge about this supplement's effect on breakdown.
To address this, researchers compared protein breakdown in young (8-month) and old (22-month) rats. They discovered that the slow down in degradation that normally follows a meal does not occur in old animals, so there is excessive breakdown. But adding leucine to the diet restored a balanced metabolism.
The team of researchers believe that the age-related problem results from defective inhibition of ubiquitin-proteasome dependent proteoloysis, a complex degradative machinery that breaks down contractile muscle protein, and that leucine supplementation can fully restore correct function.
"Preventing muscle wasting is a major socio-economic and public health issue, that we may be able to combat with a leucine-rich diet," says senior co-author Didier Attaix.
Commenting on the work Michael Rennie from the University of Nottingham Medical School at Derby says: "This is exciting because it strengthens the idea of a co-ordinated linkage between the meal-related stimulation of protein synthesis and the inhibition of breakdown."











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