Showing posts with label Science. Show all posts
Showing posts with label Science. Show all posts

Saturday, March 7, 2009

First robotics contest Makes Science chill!

Robot No. 219 was designed and built by Warren Hills Regional High School students in six weeks.

High School students participate in FIRST robotics competition.
Blair Robot Project competes at Washington, D.C.
regional.Blair team already preparing for tough future competitions.The Blair Robot Project placed 23rd among 65 participating teams at the 2009 FIRST FRC (For Inspiration and Recognition of Science and Technology Robotics Competition) Washington, D.C. regional in the Walter E. Washington Convention Center on Feb.

The FRC challenges students around the country with a game design from which teams have six weeks to assimilate their engineering, programming and constructing skills into a robot to accomplish the game's objectives. This year's game, "Lunacy," required team robots to work in alliances to score balls into baskets attached to opposing robots while driving around on a slick arena track.

With four wins and three losses in the qualification matches at the D.C. regional, Blair was not picked to move on to elimination matches, the next step of the competition. Problems attributed to the camera sensor detecting for the robot's shooter hindered the team from scoring. The shooter ended up calculating the distance and power needed to score too slowly at the competition since all targets were moving, according to senior member William Shepherdson.

The team plans to participate again at the Chesapeake regional on March 19. "We can bring 40 pounds of parts and things we build to modify our robot for Chesapeake," Shepherdson said. "We want to retweak the code a bit and are thinking about redoing our scoring mechanism." Teams from the winning alliance of each regional competition move on to the national championship in Atlanta, Ga. on April 16.

The Blair Robot Project, sponsored by physics teacher Joseph Boettcher and computer science teacher Mary McManus, began the build season on Jan. 3 by dividing and conquering their task through smaller groups - electronics, programming, drive, specialty and public relations. Three thousand dollars in parts, $9,000 in prototyping and hundreds of hours of work later was a 119-pound, five-foot tall robot complete with an automated-camera controlled turret shooter and a smooth drive system. "Some of the most dedicated members put in over 200 hours over build season," junior vice president Eric Van Albert said

Wednesday, February 18, 2009

Complicated Nano-structures Assembled With Magnets


Duke University and the University of Massachusetts have created a unique set of conditions in which tiny particles within a solution will consistently assemble themselves into these and other complex shapes.
By manipulating the magnetization of a liquid solution, the researchers have for the first time coaxed magnetic and non-magnetic materials to form intricate nano-structures. The resulting structures can be "fixed," meaning they can be permanently linked together. This raises the possibility of using these structures as basic building blocks for such diverse applications as advanced optics, cloaking devices, data storage and bioengineering.

Changing the levels of magnetization of the fluid controls how the particles are attracted to or repelled by each other. By appropriately tuning these interactions, the magnetic and non-magnetic particles form around each other much like a snowflake forms around a microscopic dust particle.

"We have demonstrated that subtle changes in the magnetization of a fluid can create an environment where a mixture of different particles will self-assemble into complex superstructures," said Randall Erb, fourth-year graduate student. He performed these experiments in conjunction with another graduate student Hui Son, in the laboratory of Benjamin Yellen, assistant professor of mechanical engineering and materials science and lead member of the research team.

The results of the Duke experiments appear in Feb. 19 issue of the journal Nature.

The nano-structures are formed inside a liquid known as a ferrofluid, which is a solution consisting of suspensions of nanoparticles composed of iron-containing compounds. One of the unique properties of these fluids is that they become highly magnetized in the presence of external magnetic fields. The unique ferrofluids used in these experiments were developed with colleagues Bappaditya Samanta and Vincent Rotello at the University of Massachusetts.

"The key to the assembly of these nano-structures is to fine-tune the interactions between positively and negatively magnetized particles," Erb said. "This is achieved through varying the concentration of ferrofluid particles in the solution. The Saturn and flower shapes are just the first published examples of a range of potential structures that can be formed using this technique."

According to Yellen, researchers have long been able to create tiny structures made up of a single particle type, but the demonstration of sophisticated structures assembling in solutions containing multiple types of particles has never before been achieved. The complexity of these nano-structures determines how they can ultimately be used.

"It appears that a rich variety of different particle structures are possible by changing the size, type and or degree of magnetism of the particles," Yellen said.

Yellen foresees the use of these nano-structures in advanced optical devices, such as sensors, where different nano-structures could be designed to possess custom-made optical properties. Yellen also envisions that rings composed of metal particles could be used for antenna designs, and perhaps as one of the key components in the construction of materials that display artificial "optical magnetism" and negative magnetic permeability.

In the Duke experiments, the nano-structures were created by applying a uniform magnetic field to a liquid containing various types of magnetic and non-magnetic colloidal particles contained between transparent glass slides to enable real-time microscopic observations of the assembly process. Because of the unique nature of this "bulk" assembly technique, Yellen believes that the process could easily be scaled up to create large quantities of custom-designed nano-structures in high-volume reaction vessels. However, the trick is to also be able to glue the structures together, because they will fall apart when the external field is turned off, he said.

"The magnetic forces assembling these particles are reversible," Yellen said. "We were able to lock these nano-structures in their intended shapes both by using chemical glues and by simple heating."

The Duke team plans to test different combinations of particles and ferrofluids developed by the University of Massachusetts team to create new types of nano-structures. They also want to try to make even smaller nano-structures to find the limitations of the assembly process, and study the interesting optical properties which are expected from these structures.



The Ethics of Nanotechnology
What kind of world do we wish to inhabit and leave for following generations? Our planet is in trouble if current trends continue into the future: environmental degradation, extinction of species, rampant diseases, chronic warfare, poverty, starvation and social injustice.

Are suffering and despair humanity's fate? Not necessarily. We have within our grasp the technology to help bring about great progress in elevating humanity. Or we can use our evolving knowledge for destructive ends. We are already immersed in fiery debates on genetic engineering, cloning, nuclear physics and the science of warfare. Nanotechnology, with its staggering implications, will create a whole new set of ethical quandaries. A strong set of operating principles is needed -- standards by which we can guide ourselves to a healthier destiny.

The following are some ethical guidelines gleaned from both Foresight and our own philosophy and experience in this field:

* Nanotechnology's highest and best use should be to create a world of abundance where no one is lacking for their basic needs. Those needs include adequate food, safe water, a clean environment, housing, medical care, education, public safety, fair labor, unrestricted travel, artistic expression and freedom from fear and oppression.

* High priority must be given to the efficient and economical global distribution of the products and services created by nanotechnology. We recognize the need for reasonable return on investment, but we must also recognize that our planet is small and we all depend upon each other for safety, stability, even survival.

* Military research and applications of nanotechnology must be limited to defense and security systems, and not for political purposes or aggression. And any government-funded research that generates useful non-military technological advances must be made available to the public.

* Scientists developing and experimenting with nanotechnology must have a solid grounding in ecology and public safety, or have someone on their team who does. Scientists and their organizations must also be held accountable for the willful, fraudulent or irresponsible misuse of the science.

* All published research and discussion of nanotechnology should be accurate as possible, adhere to the scientific method, and give due credit to sources. Labeling of products should be clear and accurate, and promotion of services, including consulting, should disclose any conflicts of interest.

* Published debates over nanotechnology, including chat room discussions, should focus on advancing the merits of the arguments rather than personal attacks, such as questioning the motives of opponents.

* Business models in the field should incorporate long-term, sustainable practices, such as the efficient use of resources, recycling of toxic materials, adequate compensation for workers and other fair labor practices.

* Industry leaders should be collaborative and self-regulating, but also support public education in the sciences and reasonable legislation to deal with legal and social issues associated with nanotechnology.

Tuesday, February 10, 2009

How many dimensions are there in our universe?

Viennese scientists are trying to grasp the mysteries of the holographic principle: How many dimensions are there in our universe?
"A hologram, as you find it on bank notes or credit cards, appears to show a three-dimensional picture, even though in fact it is just two-dimensional," Daniel Grumiller explained. He is at the Institute of Theoretical Physics, Vienna University of Technology.
For decades, scientists have been wondering about the existence of additional dimensions so far hidden to our senses.
Grumiller and his colleagues are trying the opposite approach: Instead of postulating additional dimensions, they believe that our universe could in fact be described by less than four dimensions.
Grumiller is currently working on gravitational theories which include two spatial dimensions and one time dimension. They can be mapped onto a two-dimensional gravitationless quantum theory.
Such theories can be used to describe rapidly rotating black holes or "cosmic strings" — spacetime defects, which probably appeared shortly after the Big Bang.
In such a case, reality has fewer dimensions than we would think it appears to have. This "holographic principle" plays an important role in the physics of space time.
Instead of creating a theory of gravity in all the time and space dimensions, one can formulate a new quantum theory with one fewer spatial dimension.
That way, a 3D theory of gravitation turns into a 2D quantum theory, in which gravity does not appear any more. Still, this quantum theory correctly predicts phenomena like black holes or gravitational waves, said a Vienna release.
We perceive the space around us as three-dimensional, in terms of length, width and depth or height. According to Einstein, time and space are inseparably linked. Adding the time axis to them makes our space-time-continuum four-dimensional.


Creating a unified theory of quantum gravitation is often considered to be the "Holy Grail" of modern science
Viennese scientists are trying to understand the mysteries of the holographic principle: How many dimensions are there in our universe?

Some of the world's brightest minds are carrying out research in this area -- and still have not succeeded so far in creating a unified theory of quantum gravitation is often considered to be the “Holy Grail” of modern science.
Daniel Grumiller from the Institute of Theoretical Physics, Vienna University of Technology, can now at least unravel some of the mysteries of quantum gravitation. His results on black holes and gravitational waves are pretty mind-boggling - to say the least. Only recently he won the START prize and will use these funds to engage even more young physicians at the TU Vienna.
We perceive the space around us as three-dimensional. According to Einstein, time and space are inseparabely linked. Adding the time axis to our three-dimensional space makes our space-time-continuum four-dimensional. For decades, scientists have been wondering about the existence of additional dimensions so far hidden to our senses. Grumiller and his colleagues are trying the opposite approach: Instead of postulating additional dimensions, they believe that our universe could in fact be described by less than four dimensions.
“A hologram, as you find it on bank notes or credit cards, appears to show a three-dimensional picture, even though in fact it is just two-dimensional,” Grumiller explains. In such a case, reality has fewer dimensions than we would thinkit appears to have. This “holographic principle” plays an important role in the physics of space time. Instead of creating a theory of gravity in all the time and space dimensions, one can formulate a new quantum theory with one fewer spatial dimension. That way, a 3D theory of gravitation turns into a 2D quantum theory, in which gravity does not appear any more. Still, this quantum theory correctly predicts phenomena like black holes or gravitational waves.
“The question, how many dimensions our world really has, does probably not even have a proper answerprobably cannot be answered explicitly,” Grumiller thinks. “Depending on the particular question we are trying to answer, either one of the approaches may turn out to be more useful.”
Grumiller is currently working on gravitational theories which include two spatial dimensions and one time dimension. They can be mapped onto a two-dimensional gravitationless quantum theory. Such theories can be used to describe rapidly rotating black holes or “cosmic strings” – spacetime defects, which probably appeared shortly after the Big Bang.
Together with colleagues from the University of Vienna, Grumiller is organizing an international workshop, which will take place from April 14 to 24, 2009. Renowned participants, like scientists from Harvard, Princeton, the MIT and many other universities, reveal that the Viennese gravitation physicians are held in high regard internationally.

Wednesday, February 4, 2009

silicon chips used to repair damaged tissue in the human body.

Computer chips may 'revamp nerve

Researchers have enthused closer to creation silicon chips which could one day be used to fix damaged tissue in the human body.


Edinburgh University has developed a technique, which allows neurons to grow in fine, detailed patterns on the surface of tiny computer chips.


Neurons are the basic cells of the human nervous system.
The scientists said the development may eventually enable chips to replace damaged nerve or muscle fibres.
They also said the development could possibly be used in the development of prosthetics in the future.
During the chip manufacturing process, the scientists printed patterns on the smooth silicon surface.


The chip was then dipped in a patented mixture of proteins, and neurons grew along the patterns on the surface.
The technique also works with stem cells.
It is hoped the method will eventually enable any type of tissue to be grown on a tailor-made pathway and implanted as prosthetic tissue in the body.
Professor Alan Murray, head of Edinburgh University's School of Engineering and Electronics, who led the research, said: "This is a small but important step on the path towards the long-term goal of many scientists and medical experts - to develop surgical implants using silicon chips.
"We can now make silicon chips with circuitry as well as pathways where cells can grow in the body.
"One of the areas this could be used in is prosthetics - if we can cause cells from damaged tissues to grow where we want.
"It is going towards the realms of science fiction - there is a definite Incredible Hulk feel about it."
He added: "We also hope that, rather sooner than this, the technique will allow better methods of drug discovery and reduce the need for animal testing, as new medicines could be tested on chips rather than in live creatures."
The research was funded by the Engineering and Physical Sciences Research Council.

Tuesday, February 3, 2009

Victory of MS stem-cell treatment

Stem cells are showing more and more potential in the treatment of MS and the challenge we now face is proving their effectiveness in trials involving large numbers of people.
Not one of 21 adults with relapsing-remitting MS who had stem cells transplanted from their own bone marrow deteriorated over three years.
And 81% improved by at least one point on a scale of neurological disability, The Lancet Neurology reported.
Further tests are now planned, and a UK expert called the work "encouraging".
MS is an autoimmune disease which affects about 85,000 people in the UK.
It is caused by a defect in the body's immune system, which turns in on itself, causing damage to the nerves which can lead to symptoms including blurred vision, loss of balance and paralysis.

At first, the condition mostly causes intermittent symptoms that are partly reversible.
Over a 10-15 year period after onset, most patients develop secondary-progressive MS, with gradual but irreversible neurological impairment.
It is not the first time this treatment - known as autologous non-myeloablative haemopoietic stem-cell transplantation - has been tried in people with MS, but there has not been a great deal of success.
The researchers at Northwestern University School of Medicine in Chicago said most other studies had tried the transplants in people with secondary-progressive MS where the damage had already been done.
In the latest trial patients with earlier stage disease who, despite treatment had had two relapses in the past year, were offered the transplant.
Immune system
Stem cells were harvested from the patients and frozen while drugs were given to remove the immune cells or lymphocytes causing the damage.
The stem cells were then transplanted back to replenish the immune system - effectively resetting it.
Five patients in the study relapsed, but went into remission after receiving other therapy.
The researchers are now doing a randomised controlled trial in a larger number of patients to compare the treatment with standard therapy.
Study leader Professor Richard Burt said this was the first MS study of any treatment to show reversal of damage.
"You don't want to wait until the horse has left the barn before you close the barn door - you want to treat early.
"I think the reversal is the brain repairing itself.
"Once you're at the progressive stage you have exceeded the ability of the brain to repair itself," he said.
However, he cautioned that it was important to wait for the results of the larger trial.
And that he would not call it a cure but "changing the natural history of the disease".
Dr Doug Brown, research manager at the MS Society, said the results were very encouraging.
"It's exciting to see that in this trial not only is progression of disability halted, but damage appears to be reversed.
"Stem cells are showing more and more potential in the treatment of MS and the challenge we now face is proving their effectiveness in trials involving large numbers of people."

Google Earth goes underwater

Google Earth dives in the sea
Google dove into the sea on Monday by releasing an updated 3-D mapping service that lets users discover the ocean as if they were dolphins, swimming past flooded volcanoes and throughout underwater canyons.

You can now dive into the world's ocean that covers almost three-quarters of the planet and discover new wonders.

Google Ocean expands this map to include large swathes of the ocean floor and abyssal plain.
Users can dive beneath a dynamic water surface to explore the 3D sea floor terrain.
The map also includes 20 content layers, containing information from the world's leading scientists, researchers, and ocean explorers.

Al Gore was at the launch event in San Francisco which, Google hopes, will take its mapping software a step closer towards total coverage of the entire globe.
In a statement, Mr Gore said that the update would make Google Earth a "magical experience".
"You can not only zoom into whatever part of our planet's surface you wish to examine in closer detail, you can now dive into the world's ocean that covers almost three-quarters of the planet and discover new wonders that had not been accessible in previous versions".
Approximately 70% of the worlds surface is covered by water and contains nearly 80% of all life, yet less than 5% of it has actually been explored.
Google Oceans aims to let users visit some of the more interesting locations, including underwater volcanoes, as well as running videos on marine life, shipwrecks and clips of favourite surf and dive spots.
The new features were developed in close collaboration with oceanographer Sylvia Earle and an advisory council of more than 25 ocean advocates and scientists.
Sylvia Earle, the National Geographic Society's explorer in residence, said the new features would bring the blue planet to life.
"I cannot imagine a more effective way to inspire awareness and caring for the blue heart of the planet than the new Ocean in Google Earth."
"For the first time, everyone from curious kids to serious researchers can see the world, the whole world, with new eyes," she added.
There are also updates on the terrestrial side, including GPS tracking, virtual time travel (where users can observe changes in satellite images, such as the 2006 World Cup stadium or the desertification of Africa's Lake Chad) and narrated tours of imagery and content in Google Earth. There are also updates to the Mars 3D section, so if users have had enough of the blue planet, they can always look at the red one.


The enhanced Google Earth, available for download at earth.google.com, offers everything from photographs and videos of sea life to models of shipwrecks to water temperature data collected from buoys. Dozens of partners - including the National Geographic Society, the National Oceanographic and Atmospheric Administration and the Scripps Oceanographic Institution - contributed information to the project, which is aimed at fostering learning, promoting conservation and, no doubt, increasing Google's popularity.
By plunging underwater, Google is adding a new dimension to Google Earth, which previously showcased only the terrestrial world. Premiered four years ago, it was probably best known as a tool for users to get a bird's-eye view of their homes and to peep on their neighbor's backyards.
The omission of the liquid two-thirds of the planet prompted Sylvia Earle, the former chief scientist at NOAA and noted oceanographer, to quip once that Google Earth should be renamed "Google dirt." On stage Monday at a Google kickoff event at San Francisco's California Academy of Sciences, she declared the enhanced version a "fantastic new rendition of the earth."
Google Earth lets you fly anywhere on Earth to view satellite imagery, maps, terrain, 3D buildings, from galaxies in outer space to the canyons of the ocean. You can explore rich geographical content, save your toured places, and share with others.

Sunday, February 1, 2009

Scientists apply Darwin theory to develop new technologies


What drove Charles Darwin to his extraordinary ideas on evolution and human origins? Adrian Desmond, with co-author James Moore, argue in a new book that the great scientist had a "sacred cause": the abolition of slavery.

It makes one's blood boil," said Charles Darwin.
Not much outraged the gentle recluse, but the horrors of slavery could cost him a night's sleep.
He was thinking of the whipped house boy and the thumbscrews used by old ladies in South America, atrocities he had witnessed on the Beagle voyage.
The screams stayed with him for life, but how much did they influence his life's work?
Today you can still read of Darwin's "eureka" moment when he saw the Galapagos finches.
Alas, his conversion to evolution wasn't so simple, but it was much more interesting. It didn't occur in the Galapagos, but probably on his arrival home.
And new evidence suggests that Darwin's unique approach to evolution - relating all races and species by "common descent" - could have been fostered by his anti-slavery beliefs.

Development of Darwin's theory.....
The Development of Darwin's theory began with a search for explanations of contradictions in current faith based ideas, and led him to formulate his theory of evolution which was eventually published in his book On the Origin of Species, a turning point in the history of evolutionary thought.
Following the inception of Darwin's theory in 1838, he worked on explaining the species question through natural selection as his “prime hobby” in the background to his main occupation of publishing the scientific results of the Beagle voyage. Publication of his Journal and Remarks (now known as The Voyage of the Beagle) brought him success as an author. He was settling into married life, but suffered from bouts of illness and they moved to rural Down House away from the pressures of London. He discussed his theory with friends, and wrote up an essay setting out his basic ideas as well as continuing with experiments and wide investigations.
In 1846 he completed his third geological book, and turned from supervising the publication of expert reports on the findings from the voyage to examining barnacle specimens himself. This grew into an eight year study, establishing his expertise as a biologist and finding support for his theory. His treasured daughter suffered a long illness and died, shaking his dwindling faith in Christianity. In 1854 he resumed work on the species question. This would lead to the publication of Darwin's theory.
Charles Darwin became a naturalist at a point in the history of evolutionary thought when theories of Transmutation were being developed to explain discrepancies in the established faith based explanations of species. He considered these problems at first hand during the Beagle survey. On its return in 1836 his ideas developed rapidly. His collections and writings established him as an eminent geologist and collector.
Darwin read Malthus's Essay on the Principle of Population in the context of his findings about species relating to localities, enquiries into animal breeding, and ideas of Natural "laws of harmony". Around late November 1838 he related breeders selecting traits to a Malthusian Nature selecting from variants thrown up by "chance" so that "every part of newly acquired structure is fully practised and perfected", thinking this "the most beautiful part of my theory" of how species originated.
His theory of how species originated had now come together in principle, but he was vividly aware of the difficulties he would face in getting it accepted by his friends and colleagues in the scientific establishment. On 19 December 1838 as secretary of the Geological Society of London Darwin witnessed the vicious interrogation by Richard Owen and his allies of Darwin's old tutor Robert Edmund Grant in which they ridiculed Grant's Lamarckian heresy, showing establishment intolerance of materialist theories.

Darwin theory to develop new technologies......
Still a flash point among fundamentalist Christians, the theory of evolution proposed by Charles Darwin 150 years ago has become an indispensable tool for biologists to comprehend the natural world.
Yet as scientists mark Darwin’s 200th birthday this month, evolution is no longer simply a narrative of life. Scientists have begun using it as a tool to develop new technologies.
By doing so, they have improved law enforcement, created smarter computer programs and are remaking the field of medicine. There have been quirkier applications, such as cleaner clothes, too.
Only recently, though, have scientists begun calling attention to these breakthroughs, as the ideas of the iconic English naturalist have faced renewed attacks.
In Texas, controversy over Darwin’s work resurfaced last month when the State Board of Education narrowly voted to delete a provision that required the teaching of the weaknesses and strengths of evolutionary theory. The board is to act soon on a proposal that would require students to consider the evolutionary principle that all organisms have a common ancestor. Supporters say they want children to understand there are viable alternatives to evolution.
But Andy Ellington, a University of Texas evolutionary biologist, called that argument “almost amusing.”
“You have these folks who are trying to suggest that we shouldn’t teach evolution as something our kids need to know,” he said. “But at the same time, there are these new technologies out there shaping our lives every day.”
Darwin, born Feb. 12, 1809, sailed from England in 1831 on a five-year voyage around the world. During the journey, he took copious notes about the variability of flora and fauna.
Darwin’s observations in A Naturalist’s Voyage Around the World eventually led to the notions of natural selection and evolution, theories he laid out in On the Origin of Species, the 150th anniversary of which comes in December.
Thanks to the discovery of DNA’s structure in 1953 and the mapping of the human genome half a century later, biologists now say they understand the mechanisms by which genes mutate and species evolve. And they’re using that knowledge in increasingly powerful ways.
One of the first and most well-known uses of evolutionary theory has come in law enforcement.
Among the 3 billion or so chemical bits, or letters, in human DNA are those that change slowly and those that mutate rapidly. Scientists realized that short segments of DNA vary greatly from person to person as a result. The finding gave rise to the concept of DNA fingerprints to identify individuals.
Crime-fighting, medicineBy the late 1980s, scientists were testifying in court about the reliability of DNA evidence to convict criminals. Such evidence has become a powerful forensic tool.
“It’s had a tremendous impact on criminal justice, not the least of which has been to free a lot of innocent people,” said Rusty Hardin, now a defense lawyer who in 1988 prosecuted the first Harris County case that used DNA evidence.
In recent years, the concept of genetic identification has been extended to such areas as vintage wines and Beluga caviar, where buyers want surety that what they’re buying is authentic.
Evolution also has helped scientists become smarter about the development and use of medicines such as antibiotics and vaccines.
Physicians now understand that bacteria mutate over time. When attacked by antibiotics, some bacteria become resistant to certain antibiotics and thrive.
“Evolutionary theory has definitely guided us, and now we as a medical community know to be much more careful about the use of antibiotics,” said Dr. James Versalovic, a Baylor College of Medicine professor and the director of microbiology at Texas Children’s Hospital.
The evolution of viruses also is critical to the development of vaccines. Some viruses, such as polio, have genetic material that changes slowly over time, allowing physicians to create a vaccine that will last for life.
Other viruses, including influenza and HIV, are constantly changing. This requires annual changes to the flu vaccine and has prevented development of a successful vaccine against HIV.
“We know we are in a world where we are in a constant competition with bacteria and viruses,” said Dan Graur, a University of Houston biologist. “We need to use evolutionary principles just to keep them under control.”
Some scientists also use evolution to develop drugs to combat disease, an approach called “directed evolution.”
Biologists employing this method generate a large batch of random segments of DNA — short strips of biological material — which are then tested to see whether any will perform a useful function inside cells, such as binding to a protein. The DNA segments that fail at the task are eliminated; those that succeed are copied in such a way that new mutations are introduced. These new variants then are tested. The process is replicated many times until an optimal sequence is found.
Computer programsThe approach has led to treatments for an eye disease called wet macular degeneration and other diseases, said Ellington, the UT-Austin biologist whose lab conducts directed evolution experiments.
Computer scientists use a similar process, called evolutionary or genetic algorithms. This technique involves many people writing computer programs for a certain task, such as managing air traffic or weather forecasting. Just as members of a species compete for resources in the wild, the programs compete with one another, mixing and matching lines of code and ultimately producing the most efficient algorithm for a certain task.
A company called Maxygen has applied this process to basic household goods.
Enzymes help speed up chemical reactions and are often good at digesting fats, starches and proteins — the kinds of materials that stain clothes. Maxygen collected enzymes from different bacteria, chopped and mixed them, and created new enzymes
.

Friday, January 30, 2009

Solar power a ventilation system that can cool the car without help from the engine.


Solar cars still a way off

Toyota's third-generation Prius, due at dealerships this spring, will have an optional solar panel on its roof. The panel will power a ventilation system that can cool the car without help from the engine, Toyota says.
But it's a long way from the 2010 Prius to a solar-powered car, experts told CNN. Most agree that there just isn't enough space on a production car to get full power from solar panels.

"Being able to power a car entirely with solar is a pretty far-reaching goal," said Tony Markel, a senior engineer at the federal government's National Renewable Energy Lab in Golden, Colorado.


In the new Prius, the solar panel will provide energy for a ventilation fan that will help cool the parked car on sunny, hot days. The driver can start the fan remotely before stepping into the car. Once the car is started, the air conditioning won't need as much energy from a battery to do the rest of the cooling.


"The best thing about using solar is that regardless of what you end up using it for, you're trying to use it to displace gasoline," added Markel.


The question is, how much gasoline can solar power offset? Markel said his lab has modified a Prius to use electricity from the grid for its main batteries and a solar panel for the auxiliary systems. He believes the car gets an additional 5 miles of electric range from the panel.
According to recent articles in Japan's Nikkei newspaper, Toyota has bigger plans for harnessing power from the sun. Nikkei reports that Toyota hopes to develop a vehicle powered entirely by solar panels. The project will take years, the paper reported.


When contacted by CNN, however, a Toyota spokeswoman denied the existence of the project.


"At this time there are no plans that we know of to produce a concept or production version of a solar-powered car," said Amy K. Taylor, a communications administrator in Toyota's Environmental, Safety & Quality division.


Motorists don't have to wait for a 2010 Prius to drive a solar-enhanced car, however. Greg Johanson, president of Solar Electric Vehicles in Westlake Village, California, said his company makes a roof-mounted panel for a standard Prius that enables the car to travel up to 15 additional miles a day.


The system costs $3,500, and it takes about a week to make one, Johanson said. Billy Bautista, a project coordinator at the company, said Solar Electric Vehicles gets so many requests for the system that there is a backlog of several months.


The company's Web site says motorists can install the panels themselves, although it recommends finding a "qualified technician."


The system delivers about 165 watts of power per hour to an added battery, which helps powers the electric motor, Johanson said.


But others said it would take a lot more power than that to replace an internal combustion engine.


Eric Leonhardt, director of the Vehicle Research Institute at Western Washington University, said that even if solar cells worked far better than they do today, they wouldn't generate enough power for driving substantial distances. The best cells operate at about 33 percent efficiency, but the ones used on vehicles are only about 18 percent efficient, he said.


Leonhardt said it would be more practical to use solar power to help charge a car's battery and use the more efficient panels mounted on a roof or over a parking area to supply the rest of the electricity needed to drive the engine.


"Solar panels really need a lot of area," he said.


Leonhardt thinks Toyota's new Prius is a good first step toward using renewable energy. Some cars get hotter than 150 degrees inside when parked in the sun, so reducing the temperature could mean Toyota could use a smaller AC unit, he added.


Johanson of Solar Electric Vehicles said he'd like to see Toyota bring the weight of a Prius down from 3,000 pounds to 2,000. He also hopes for a small gasoline engine and a larger electric motor. That will probably come in the future, when Toyota unveils a plug-in engine.


In the meantime, Solar Electric Vehicles sells its version of a plug-in Prius, with a solar panel installed, for $25,000, Bautista said.


Toyota is the largest automaker to incorporate solar power into a mass-produced car. But its solar panel is not the first for a car company. Audi uses one on its upscale A8 model, and Mazda tried one on its 929 in the 1990s.


In addition, a French motor company, Venturi, has produced an electric-solar hybrid. The Eclectic model costs $30,000, looks like a souped-up golf cart and uses roof-mounted solar panels to help power an electric engine. It has a range of about 30 miles and has a top speed of about 30 mph.



ABOUT Solar vehicle


Borealis III leads the way during the 2005 North American Solar Challenge passing by Lake Benton, Minnesota.A solar vehicle is an electric vehicle powered by a type of renewable energy, by solar energy obtained from solar panels on the surface (generally, the roof) of the vehicle. Photovoltaic (PV) cells convert the Sun's energy directly into electrical energy. Solar vehicles are not practical day-to-day transportation devices at present, but are primarily demonstration vehicles and engineering exercises, often sponsored by government agencies.


Solar cars
Solar cars combine technology typically used in the aerospace, bicycle, alternative energy and automotive industries. The design of a solar vehicle is severely limited by the energy input into the car (batteries and power from the sun). Virtually all solar cars ever built have been for the purpose of solar car races (with notable exceptions).


Like many race cars, the driver's cockpit usually only contains room for one person, although a few cars do contain room for a second passenger. They contain some of the features available to drivers of traditional vehicles such as brakes, accelerator, turn signals, rear view mirrors (or camera), ventilation, and sometimes cruise control. A radio for communication with their support crews is almost always included.


Solar cars are often fitted with gauges as seen in conventional cars. Aside from keeping the car on the road, the driver's main priority is to keep an eye on these gauges to spot possible problems. Cars without gauges available for the driver will almost always feature wireless telemetry. Wireless telemetry allows the driver's team to monitor the car's energy consumption, solar energy capture and other parameters and free the driver to concentrate on just driving.


Electrical and mechanical systems
The electrical system is the most important part of the car's systems as it controls all of the power that comes into and leaves the system. The battery pack plays the same role in a solar car that a petrol tank plays in a normal car in storing power for future use. Solar cars use a range of batteries including lead-acid batteries, nickel-metal hydride batteries (NiMH), Nickel-Cadmium batteries (NiCd), Lithium ion batteries and Lithium polymer batteries.


Many solar race cars have complex data acquisition systems that monitor the whole electrical system while even the most basic cars have systems that provide information on battery voltage and current to the driver.


The mechanical systems of a solar car are designed to keep friction and weight to a minimum while maintaining strength. Designers normally use titanium and composites to ensure a good strength-to-weight ratio.


Solar cars usually have three wheels, but some have four. Three wheelers usually have two front wheels and one rear wheel: the front wheels steer and the rear wheel follows. Four wheel vehicles are set up like normal cars or similarly to three wheeled vehicles with the two rear wheels close together.

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Tuesday, January 27, 2009

UCLA researchers have reprogrammed human induced pluripotent stem cells

For the first time, UCLA researchers have reprogrammed human induced pluripotent stem (iPS) cells into the cells that finally become eggs and sperm, possibly opening the door for new treatments for sterility using patient-specific cel
The iPS cells were coaxed into forming germ line precursor cells which include genetic material that may be passed on to a child. The study appears today in the early online edition of the peer-reviewed journal Stem Cells.
“This finding could be important for people who are rendered infertile through disease or injury. We may, one day, be able to replace the germ cells that are lost,” said Amander Clark, a Broad Stem Cell Research Center scientist and senior author of the study. “And these germ cells would be specific and genetically related to that patient.”
Theoretically, an infertile patient’s skin cells, for example, could be taken and reprogrammed into iPS cells, which, like embryonic stem cells, have the ability to become every cell type in the human body. Those cells could then be transformed into germ line precursor cells that would eventually become eggs and sperm. Clark cautioned, however, that scientists are still many years from using these cells in patients to treat infertility. There is still much to be learned about the process of making high quality germ cells in the lab.In another important finding, Clark’s team discovered that the germ line cells generated from human iPS cells were not the same as the germ line cells derived from human embryonic stem cells. Certain vital regulatory processes were not performed correctly in the human iPS derived germ cells, said Clark, an assistant professor of molecular, cell and developmental biology.
So it’s crucial, Clark contends, that work continue on the more controversial human embryonic stem cells that come from donated, excess material from in vitro fertilization that would otherwise be destroyed.
When germ cells are formed, they need to undergo a specific series of biological processes, an essential one being the regulation of imprinted genes. This is required for the germ cells to function correctly. If these processes are not performed the resulting eggs or sperm, are at high risk for not working as they should. This has significant consequences, given that the desired outcome is a healthy child.
“Further research is needed to determine if germ line cells derived from iPS cells, particularly those which have not been created by retroviral integration, have the ability to correctly regulate themselves like the cells derived from human embryonic stem cells do,” Clark said. “When we looked at the germ cells derived from embryonic stem cells, we found that they regulated as expected, whereas those from the iPS cells were not regulated in the same way. We need to do much more work on this to find out why.”
Humanitarian goals, science get new life
PRESIDENT Obama's inauguration has led to the resumption of aid to international groups that perform or give information about abortions and should open the door to important scientific research. Both developments are a boost to humanitarian and medical advances that should expand during the Obama administration.
The new president signed an executive order on Friday that ended the ban on giving taxpayer money to international family groups that offer abortions or provide related information. The assistance was available from the Agency for International Development during the Clinton administration but banned during the Reagan and both Bush administrations.
Obama also is expected to restore funding for the U.N. Population Fund, which George W. Bush had rejected on the contention that it supported a Chinese family planning policy of coercive abortion and involuntary sterilization, an allegation that the agency vehemently denied. In fact, the lifting of the bans will reduce unintended pregnancies, abortions and the deaths of women from high-risk pregnancies.
The signing came a day after the Food and Drug Administration allowed the world's first clinical trial of a treatment derived from human embryonic stem cells for spinal cord injury. The therapy uses an old embryonic stem cell line that was allowed under the latest Bush administration but the approval might have been delayed until Bush left office.
The Bush administration restricted federal financing for embryonic stem cell research because creation of the cells entailed destruction of human embryos, even though they had been destined for the trash. President Obama has pledged to remove some of the financial restrictions.


Research on stem cells is the subject of intense investigation, both from a basic science point of view, as well as a basis for cell-based therapies to treat disease. The ability to study and characterize stem cells has been aided by the identification of specific markers which allow researchers to characterize and enrich these cells. The use of immunophenotyping is an important technique to distinguish one population of cells from another. eBioscience is dedicated to providing you with a choice of innovative primary antibody reagents and flurochromes to accelerate your stem cell research using multicolor flow cytometry.

Thursday, October 25, 2007

LHC( Large Hadron Collider) :ATLAS 
big wheel triumph


LHC ( Large Hadron Collider)
ATLAS celebrates installing the last of the eight big wheels. These wheels form the end-cap muon spectrometer of the detector.
The ATLAS end-cap muon detectors, the ‘big wheels’, have been compared to many things: flowers, orange halves, clock faces and works of art. But, more importantly, each is an incredible feat of engineering. On Friday last week the team celebrated the completion of the last wheel, and moved into the final stages of installation.

"I must admit that at the end of last year I would not have believed that we would manage to install these eight big wheels essentially on schedule," admitted Peter Jenni, ATLAS spokesperson. The first of the wheels took a long time to install, but the last one took just a couple of weeks. "This is really a great achievement."

The big wheels harbour ATLAS’s middle layer of muon chambers in the forward region and are one of the last large pieces to be installed. Each is 25m across, weighs between 40 and 50 tonnes and contains around 80 precision chambers or 200 trigger chambers. The support structure itself is just one third of the weight of the total wheel.

Because of their sheer size, each wheel had to be made in 12 pieces for the trigger planes and 16 pieces for the precision-measurement planes, or "petals", of aluminium, the last of which was installed on Friday. Each was assembled at CERN using components from all over the world before being fitted together, piece by piece like a jigsaw.

Because of the need for space for the chambers, designing a suitable structure presented a unique challenge, one that project engineers, Raphaël Vuillermet, Dimitar Mladenov and Giancarlo Spigo were happy to take on.

"The detectors themselves have been on drawings for 15 years; everyone knew where they would go but no one knew about the structure," explains Dimitar. "There were chambers everywhere so our design had to build around them and in the small spaces in between them."

The result after 3 years of calculation, design and sleepless nights was a uniquely thin and light structure that is precise to less than a millimetre.

The 100-member collaboration from Israel, Japan, the US, China, Russia, Europe and Pakistan began assembly of components in 2005 and installation in 2006. "Because the pieces are so delicate we had to be careful throughout the whole process," explains Raphaël. "I was very afraid about something happening to the chambers and also to the people, because you are working 30 metres up. But we didn’t have any problems."

The completion of the big wheels is symbolic for ATLAS because, as technical coordinator Marzio Nessi explains, "the big wheels were always seen as something we would do at the end. And now we have done them."

For Dimitar the biggest challenge was the timing. "I feel proud, but not for myself, for everyone. It was the result of hard work. The only thing that we were lucky about was the weather; if there had been a single day of heavy rain we might have been delayed. But Marzio said not to worry and to leave the weather to him, and the weather was great. I don’t know how he did it!"

Now just two smaller scale wheels and the end-wall chambers remain to be installed, and the big wheels have already begun to give read-outs as part of test runs using cosmic ray data that ATLAS performs every six weeks.

With their striking symmetry and aesthetic appeal the big wheels are likely to become icons of the experiment. But to Marzio, all pieces of ATLAS are beautiful. "This piece just happens to be 25m high."

Wednesday, October 24, 2007

Robotic Cars Must Drive In Darpa Challenge


The robotic vehicles must navigate traffic circles, avoid moving obstacles, and merge into lanes without human intervention. They also must obey California's traffic laws.

Some of the best and brightest geek squads are revving up their engines for the Defense Advanced Research Projects Agency's Urban Challenge next month.
More than 30 semifinalists will compete, beginning Friday, to qualify their robotic vehicles for the final competition on Nov. 3, in Victorville, Calif. Twenty teams will make it to the urban military training grounds on the former George Air Force Base, for cash prizes of up to $2 million.

For some in Team Berlin, that could mean slowing down a bit. The team includes engineering students and faculty from Rice University in Houston and from Freie Universität Berlin, whose home turf includes the Autobahn.

"The vehicles must perform as well as someone with a California driver's license," Darpa Director Tony Tether said in a prepared statement.

Teams from Georgia Tech, Carnegie Mellon University, Stanford University, and Virginia Tech are among the finalists.

The vehicles also will conduct simulated military supply missions to judge their performance in realistic environments.

With many technology companies and innovators participating and supporting the event, innovations from the race are used to improve car safety and robotics. The U.S. military aims to operate one-third of its vehicles without drivers by 2015. Darpa hosted its first Grand Challenge in 2004 to spur innovation needed to meet that goal.

The first year, none of the vehicles could finish the qualifying course. By 2005, 23 teams qualified and Stanford's Stanley took the $2 million prize, completing about 130 miles in nearly seven hours. This year, teams developed cars that made it through intersections with other cars and moved as smoothly as if drivers had taken the wheel.

Wednesday, October 3, 2007

The day the space age began


From the beginning we human are curious about all that we dont have or that we cannt.
which starts research . we get success.
Fifty years ago, a 184lb ball called Sputnik became the first man-made object to be launched successfully into orbit. The world was changed for ever. Rupert Cornwell looks back on an achievement that set the tone of geopolitics for a generation .

Exactly 50 years ago today, on 4 October 1957, the Russians launched Sputnik, the first ever artificial satellite to orbit the Earth. It circled our planet in roughly 96 minutes, at an altitude of about 150 miles, travelling at a speed of 18,000mph, crossing the US seven times a day. Inside the sphere of polished aluminium were two radio transmitters, and batteries.

Compared to the devices that orbit the planet now, it was primitive in the extreme. Yet Sputnik was a watershed in history.

Curiously, in the Soviet Union of the time, it didn't seem that big a deal, at least initially. The country's leader Nikita Khrushchev was told of the successful launch while he was attending a meeting of party functionaries in Kiev. He was delighted, but the others only wanted to talk about the need to boost local electricity supplies. Only when pandemonium ensued in the US did Moscow realise the magnitude of its propaganda coup – technological, but in those days above all military.

Satellites, scientists understood, could be important tools for both peace and war. But what struck such dread into Americans, and provided such a strong card for their opponents, was the R-7 rocket which carried Sputnik into space. As Khrushchev's son Sergei – a 22-year-old engineering student at the time of the launch who later worked on the Soviet space programme – stresses today, the top priority of the day was to develop an intercontinental ballistic missile to deter an American nuclear first strike. Security, not space exploration, was the name of the game: "Back then, we lived in the same situation as Iran is in now," Sergei, now an American citizen and a professor at the Ivy League Brown University in Rhode Island, said this week.

With the R-7 the Soviets had achieved their goal – or so it seemed to a panicked US.

News of Sputnik came as a bombshell – rating one of those across-the-front-page, triple deck headlines that The New York Times reserves for presidential election results and events like 9/11. Ordinary Americans were stunned, caught napping as they luxuriated in their consumer comforts of cars with shiny chrome tail fins and fancy safety razors. The post-war generation had never had it so good. Now, it appeared, the country faced a threat to its very survival as a free nation.

President Dwight Eisenhower himself reacted with restraint, refusing to overdramatise events – indeed, he is said to have put in five rounds of golf in the week after Sputnik was launched – but he was about the only one. With his blue-chip military reputation, Ike could get away with so measured a response, albeit barely. Today, in the pantheon of presidents, Eisenhower stands higher than he ever has. But for decades afterwards, the Sputnik shock seemed to mark him as old, complacent and out-of-touch. His Democratic opponents were merciless. Lyndon Johnson, the then Senate majority leader, conjured up a science fiction nightmare of giant Soviet platforms in space from which they would rain down bombs on America "like kids dropping rocks on to cars from freeway overpasses".

As the Iraq war shows, hysterical over-reaction to threats is a constant of US history. But at the time few considered it an over-reaction to build fall-out shelters across the land, and drill schoolchildren on how to shelter under their classroom desks in the event of nuclear attack.

A couple of months after Sputnik, hysteria merged with outright national humiliation, when the Vanguard rocket supposed to put America's first satellite into space blew up on the launch pad, live on television, having climbed just four feet into the air. The occasion proved that Pentagon spin was as brazen then as it is now. A military spokesman denied an explosion had taken place. What the world had watched, he said, was "rapid burning".

Eventually, in February 1958, the US did successfully launch its first satellite, Explorer-1. By then, however, the Russians had already put an animate object, in the shape of a terrier called Laika, into space in a much larger Sputnik 2. The unfortunate animal is believed to have died of stress and overheating a few hours into her flight, but the headlines paid scant attention to that. "Soviets Orbit Second Artificial Moon: Communist Dog in Space," read one typical specimen.

Even more profound was the political impact. The Democrats made hay of Ike fiddling (or more exactly perfecting his short game) as Washington burnt.

In the popular mythology, America had stood by watching, mesmerised by shallow consumerism, as the Reds vaulted into tomorrow.

In truth, Sputnik was something of a bluff. The R-7 rocket was too big and too expensive to manufacture in any number, nor did the Russians then have the technology to guide an ICBM to its destination. Sputnik, too, was a bluff. The missile, Nikita Khrushchev privately acknowledged, "was only a symbolic counterthreat to the United States". Not until the 1960s, his son would later reveal, did Moscow acquire its first operational ICBMs. But at the time no one knew this – or, to be precise, no one could say so.

The legend of the "missile gap" was born, and may have proved crucial to John F Kennedy's defeat of Richard Nixon in the 1960 presidential election, as he hammered on about how the Eisenhower-Nixon team had allowed the Soviet Union to achieve strategic superiority. It was not so, as Eisenhower had known well for years, thanks to secret U-2 spy plane flights at altitudes Soviet air defences were unable to reach.

Indeed, the Sputnik programme was partly conceived as a riposte to the U-2.

But for Eisenhower to have given proof that the Democrats' claim was false, he would have had to admit the U-2's existence (which did of course become public knowledge in 1960, when the Soviets finally managed to shoot down the one flown by Gary Powers). Thus did Sputnik usher in the most dangerous phase of the Cold War, which culminated in the Cuban missile crisis of October 1962 – after which both countries in effect decided "never again", installing a hotline between their two capitals, and accepting the doctrine of Mad (or mutually assured destruction).

Five decades on, it is even clearer that while the first Soviet satellite most certainly changed the world, it was not in the way expected at the time. Yes, the R-7's legacy persists, in the land- and submarine-launched ICBMs that are the basis of both sides' strategic nuclear weapons: lodged in Trident submarines silently patrolling the oceans, and the missile silos that look like unmanned power grid relay units, eerily dotted across the empty plains of North Dakota.

True, too, Sputnik might be seen as the first step towards a future militarisation of space, where one day lethal weapons may be dropped down on Earth, as LBJ so colourfully imagined. But the SDI "Star Wars" programme announced by Ronald Reagan has shrunk to an uncompleted missile defence system that causes diplomatic ructions with Moscow, is of uncertain reliability, and is of dubious strategic value.

If Sputnik was a poor guide to the military future, the giddy expectations it stirred of man's presence in space have not been met either. At the time, it seemed to prove that science fiction's claims were not fiction at all. Moreover, Nasa was set up within a few months, under intense public pressure.

In retrospect, however, the July 1969 Moon landing remains the defining moment of space exploration. The US had responded to Sputnik and showed that with its mind on the job, it was more than a technological match for the Soviet Union. But the wilder fantasies spawned by Sputnik, of human voyages to the planets and colonies in space, are little more plausible now than then.

In 2004, President George Bush set out a new vision for Nasa, vowing to complete the international space station and to establish a permanent base on the Moon by 2020, from which "human beings are headed for the cosmos". But the plans have struck no public chord. The foreseeable future extends no further than unmanned missions within our own solar system.

In short, the era that Sputnik inaugurated has been not outward-looking, but introspective, focused not on the great dark blue yonder of the universe, but on the needs and problems of our own troubled and fragile planet. Since Sputnik, 6,000-plus satellites have been put into space. Today there are perhaps 900 up there functioning, some monitoring the environment, and at least half of them for communications purposes, both civilian and military.

This is not the "Space Age" that Sputnik was meant to usher in, but an "Information Age" powered by satellites which has led to a new industrial revolution. Yet, paradoxically, it may be of greater military relevance than ever – not to annihilate an enemy power, but in the more subtle defeat of today's terrorist foes. Not with intercontinental missiles, but by intercepting their phone calls and spying on their activities from space – courtesy, ultimately, of Sputnik.

Russian science: What the scientists say



24hoursnews

:ATTITUDES OF RUSSIAN SCIENTISTS TO FOREIGN SUPPORT
SOURCE. Iurevich and Tsapenko (as item 2), pp. 54-69 (chapter written together with I. Dezhina)

While only a small minority of Russian scientists receive support from abroad, (1) most have sought such support at one time or another. Almost every scientific collective, the authors remark, now has its "experts on foundations" who bombard potential foreign sponsors with appeals for money.

To explore the attitudes of Russian scientists to foreign support, the Central Institute for the Study of Public Opinion (TsIOM) surveyed 250 natural and social scientists from the main regional scientific centers, including Moscow, St. Petersburg, Novosibirsk, Tomsk, Saratov, and Chelyabinsk. (2)

(a) Benefits and drawbacks of foreign support

"With regard to the general influence of foreign support on Russian science, moderately positive assessments predominate." Thus 13 percent of respondents consider foreign support of Russian science absolutely essential; two-thirds think it useful but not essential; and 13 percent regard it as humiliating or harmful.

In what ways does foreign support benefit Russian science and Russian scientists?

* In the view of 49 percent of respondents, foreign support increases the QUANTITY of scientific output.

* In the view of 35 percent of respondents, foreign support improves the QUALITY of scientific output.

* In the view of 52 percent of respondents, foreign support facilitates the creation of new scientific research programs.

* In the view of 62 percent of respondents, foreign support makes its recipients more independent of the directors of their institutes.

* In the view of 37 percent of respondents, foreign support revives the interest of Russian scientists in such traditional attributes of a scientific career as the publication of articles and monographs and the acquisition of academic degrees, inasmuch as these increase one's chance of getting a grant.

* In the view of 60 percent of respondents, grants from foreign foundations are a very substantial supplement to the income of Russian scientists (typically $100-200 per month). However, 65 percent of respondents note that grants are not large enough to cover trips abroad or the purchase of new equipment. They get "eaten up" by their recipients without changing the situation of Russian science as a whole. The system is "oriented toward growing vegetables not fruit trees."

* Many respondents also stress the moral dimension of foreign support, which makes the beneficiaries feel that they are a part of world science and that at least someone values their work.

The two most commonly mentioned negative effects of foreign support are:

* that -- in the opinion of 43 percent of respondents -- it undermines good relations among scientists by sowing divisions between the envied recipients of grants and their less fortunate colleagues, and

* that the hunt for grants takes up a large part of scientists' time, distracting them from their research.

The authors note some differences in the attitudes expressed by various categories of respondents:

* Men tend to be more skeptical about the benefits of foreign support than women are.

* Older and senior scientists, especially institute directors, tend to be more skeptical than their junior colleagues.

* Natural scientists, who are unable even with foreign support to buy the equipment they need, feel that social scientists receive a disproportionate share of the available funds.

* Contrary to expectations, no significant difference was found between the views of scientists who received foreign support and the views of scientists who did not.

(b) Attitudes to different forms of foreign support

The basic form of foreign support is the award of individual (or less often collective) grants on a competitive basis. Most respondents -- 86 percent -- approve of this practice. But a number of criticisms were also frequently voiced:

* Some grants should be awarded on the basis of nomination.

* More joint research projects with foreign collaborators should be funded.

* Some areas of science that are seen as politically relevant get disproportionate support at the expense of other less politicized but no less important areas.

* More support should be given to new scientific directions and open-ended exploratory research.

(c) Motives attributed to foreign sponsors

Only 12 percent attribute purely altruistic motives to foreign sponsors, seeing them as "Santa Claus," while 40 percent believe they "are trying to buy up our ideas on the cheap" and 14 percent suggest that their goal is to protect Western scientists from competition by stemming the emigration of Russian scientists. Only a few attribute to foreign sponsors the motive of preventing Russian scientists from working for "rogue states" like Iran and Iraq or long-term strategic motives like turning Russia into a "civilized neighbor" of the West.

16 percent suspect that Western secret services may be involved in foreign funding of Russian science, but they do not regard this as such a terrible thing. Some argue that the West has an interest not in undermining but in stabilizing the Russian state.

(d) Perceptions of foreign foundations

Although most Russian scientists are interested in obtaining foreign support for their work, they are poorly informed about foreign foundations. Few respondents were able to name more than two or three foreign foundations. (3) By far the best known and most highly regarded is the Soros Foundation, which is mentioned by 83 percent of respondents. The Ford and MacArthur Foundations are quite widely known. German and other non-American foreign foundations are rarely mentioned.

Only 35 percent of respondents think that they have an adequate understanding of the mechanism by which grants are allocated; 54 percent say they have a vague idea, and 7 percent admit that they have no idea whatsoever. Many confess that they find the allocation of grants by the MacArthur Foundation in particular "a complete enigma." This ignorance, the authors comment, is "fertile ground for the circulation of all sorts of rumors and the attribution to foreign foundations of dubious aims."

What, in the opinion of respondents, are the main factors influencing a scientist's chances of obtaining a grant?

* the personal connections of applicants (68 percent)

* their skill in writing applications (55 percent)

* their objective scientific achievements (29 percent)

* their formal status, i.e. post occupied and academic degree (27 percent)

* their informal authority (22 percent)

The majority of respondents see the process by which grants are awarded as subjective, chaotic, and corrupt. Here are some typical statements:

-- "The main thing here is the administrative apparatus of distribution, which keeps part of the money for itself."

-- "This sphere is quite corrupt."

-- "Our grant bureaucrats have concentrated in their hands power that Soviet bureaucrats never dreamed of."

-- "I do not exactly know this mechanism, but I have the a priori opinion that it's a mafia grouping."

Resentment is directed especially at the many employees of foreign foundations who are Russian emigres or people from specific politicized institutions such as the Institute for the Study of the USA and Canada. Respondents say that the emigres left Russia a long time ago and have a poor knowledge of the contemporary state of Russian science.

Thus the appreciation that respondents feel for the support offered by foreign foundations is marred by their acute dissatisfaction with the way that the foundations operate.

NOTES

(1) The authors' estimate is 4 percent, but it is not clear whether this refers to all those who have ever received foreign support or to those receiving such support at a particular moment in time. "Scientist" is used in the broad sense of the Russian "uchenyi" to include not only natural and social scientists but also scholars in the humanities.

(2) Of the 250, 200 completed questionnaires while 50 were interviewed in depth. The time of the survey is not specified, but appears to have been some time in the early 1990s.

(3) Curiously, some respondents thought that purely Russian foundations such as the Russian Foundation for Fundamental Research were foreign foundations. Perhaps they were not aware that Russian foundations actually exist.

Tuesday, October 2, 2007

Toshiba plans to begin selling TVs with OLED screens as soon as panels are ready.


Toshiba Corp. plans to begin selling televisions with OLED (organic light-emitting diodes) screens as soon as panels are ready, according to a company spokeswoman.

The first Toshiba OLED television sets should hit the market in 2009, said Yuko Sugahara [CQ], a company spokeswoman.

OLED screens offer higher contrast and faster response times than LCD (liquid crystal display) screens. OLED screens can also be thinner since no backlight is required. The carbon-based materials used to make OLEDs illuminate themselves when an electrical current is applied.

However, OLEDs are difficult to manufacture and degrade over time. Manufacturers are therefore working on ways to improve production yields and increase the lifespan of the screens.

Sony Corp. became the first company to introduce an OLED television on Monday, with the release of its XEL-1. The television, which goes on sale in December, has an 11-inch screen and has an estimated of lifespan of around 30,000 hours. That's enough time to watch eight hours of television per day for 10 years, Sony said.

While Sony was first to market with an OLED television, a lot of work remains to be done before the screens are ready for widespread adoption. The XEL-1 will be available in limited quantities, with Sony expecting to produce just 2,000 sets per month.

OLED
An organic light-emitting diode (OLED) is any light-emitting diode (LED) whose emissive electroluminescent layer comprises a film of organic compounds. The layer usually contains a polymer substance that allows suitable organic compounds to be deposited. They are deposited in rows and columns onto a flat carrier by a simple "printing" process. The resulting matrix of pixels can emit light of different colors.

Such systems can be used in television screens, computer displays, portable system screens, advertising, information and indication. OLEDs can also be used in light sources for general space illumination, and large-area light-emitting elements. OLEDs typically emit less light per area than inorganic solid-state based LEDs which are usually designed for use as point-light sources.

A great benefit of OLED displays over traditional liquid crystal displays (LCDs) is that OLEDs do not require a backlight to function. Thus they draw far less power and, when powered from a battery, can operate longer on the same charge. OLED-based display devices also can be more effectively manufactured than LCDs and plasma displays. But degradation of OLED materials has limited the use of these materials. See Drawbacks.

OLED technology was also called Organic Electro-Luminescence (OEL), before the term "OLED" became standard.

Monday, September 17, 2007

Kids' $100 Laptop Jumps in Price to $188


The famous laptop project by the OLPC project will now cost $188 instead of $100. The One Laptop Per Child project has been plagued with problems for some time now. The price has nearly been doubled by the not-for-profit organization to cover losses and fill a void with the inability to book orders.

The One Laptop Per Child (OLPC) project has raised the price of its XO laptop to US$188, according to an Associated Press report.

OLPC spokesman George Snell confirmed the price change on Friday, the AP report said. Snell blamed the price hike on "currency fluctuations" and the rising cost of raw materials like nickel and silicon.

OLPC executives in the U.S. were not immediately available for comment. Previously, OLPC said the XO would cost $176.

The reported price hike comes at a critical juncture for OLPC. The XO laptop has gone through four prototype stages, and the design has been locked down for weeks. In August, Quanta Computer Inc. completed a manufacturing run of 300 units to test the production process -- the final step before mass production of the XO begins later this month or in early October.

OLPC customers are counting on a low-cost laptop, and it was not immediately clear what, if any, impact the latest price hike will have on orders for the XO.

OLPC laptop gets minor delay along with price bump
Rumors that the XO laptop still has some refinement in terms of both pricing and configuration were confirmed late last week. A spokesperson for the One Laptop Per Child (OLPC) Project told the AP on Friday that the price of the XO laptop has risen to $188 per unit and that the project faces product delays. The cost increase of approximately $12 may not seem like much, but given that initial orders from governments must amount to at least 100,000 units, it all adds up quickly.

The OLPC project designed the XO laptop to be used by students in developing countries. The non-profit organization will sell the laptops to foreign governments to distribute to children through schools. Although the systems were originally intended to sell for $100 each, the price has steadily climbed as a result of additional features and unexpected costs.

The XO laptops, which are being manufactured by Quanta in Taiwan, include innovative hardware features like a dual-mode LCD screen, a pull-string charger, a wide touchpad, and a unique wireless mesh network system. The XO's Linux-based operating system also includes innovative features including a highly unusual user interface.

The OLPC Project now faces competition from Intel's Classmate PC and a new laptop developed by Asus called the Eee PC that is scheduled for release this month.

The OLPC Project reportedly faces delays as well, but the severity of those delays isn't apparent yet. In the latest OLPC community newsletter, which was written last week, OLPC president Walter Bender says "there were Sugar, network, and security reviews this week resulting in the reporting of some new bugs and future features. One outcome was the identification of some last-minute features, so we will not be ready for code freeze on Monday—we are probably off by about a week. Next week, we will have a major push to get all remaining blocking bugs addressed."

Although the XO laptop has fallen short of initial expectations and far exceeded the original anticipated price of $100, the project is still heading towards a strong launch with a product that has lots of potential. The project is still confident that it can reach $100 per unit (if not below) over the next year or two with scale, but achieving that scale is going to be hard in the face of price increases.

Thursday, September 13, 2007

Web TV show


MySpace still has a few cards up its sleeve -- including the connections it has to some of the top names in traditional media, thanks to its parent company, media and entertainment giant News Corp.


The social-networking site announced today that it has signed an exclusive deal with Ed Zwick and Marshall Herskovitz, the Hollywood duo that produced such hit TV shows as Thirtysomething and My So-Called Life, for the rights to a new Internet drama the pair are working on, called Quarterlife.


Episodes -- or webisodes -- of the show, which follows a group of twentysomethings through the eyes of one young girl with a video-blog, will appear first on MySpaceTV, and then on the Quarterlife.com website.


Jeff Berman, the general manager of MySpaceTV, said in an interview that the show was a "landmark moment" for MySpace, and that it would be "the highest-quality serialized content ever to appear on the Internet. We're talking about the same production values as 24 or Prison Break."


There have been a number of episodic TV-style shows created for the Internet, including the popular Lonelygirl15 show, which was developed by a trio of unknowns and also appears on MySpaceTV. More recently, former Walt Disney CEO Michael Eisner's company created a show called Prom Queen, which aired on MySpaceTV and drew a large following.


Entertainment websites have been speculating for several months about a possible Internet offering from Mr. Zwick and Mr. Herskovitz, after a number of reports leaked out about TV writers and production staff working on something called Quarterlife. The Hollywood duo had a traditional TV show of the same name that ran briefly in 2005.


"We've been talking to [Zwick and Herskovitz] for the past several weeks, and we're delighted to be able to announce this," Mr. Berman said. The first "webisode" will be posted on MySpaceTV on November 11, he said.


Under the terms of the deal, the social-networking site has a 24-hour window during which the webisode will only be available on MySpaceTV. After that, it will appear on Quarterlife.com. Both sites will have interactive features, Mr. Berman said, but on MySpace viewers will be able to interact with the cast through their MySpace pages.


MySpace users and bloggers on other sites will also be able to "embed" the webisodes in their pages by pasting in a small chunk of code, as they can with video clips on other sites such as YouTube, Blip.tv and DailyMotion.


When asked whether the new show would have a mobile component involving cellphones, Mr. Berman said "stay tuned." He also said that MySpaceTV was working on several other projects with content creators in the entertainment community.


According to Mr. Berman, more than 50 million users stream video each month from their MySpace webpages, and the social-networking site as a whole produces 500 million individual video streams


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Faced with Facebook's exponential growth, MySpace hopes to keep its users onside with what it says is the first network-quality television series produced directly for the internet.


The social network announced today it had secured the exclusive international distribution rights for Quarterlife, a new series from Emmy award-winning producers Marshall Herskovitz and Edward Zwick.


MySpace Australia spokesman Darain Faraz said the deal was just the first of many shows it planned to offer through MySpace TV, which up until now has consisted mainly of user-submitted clips.


He said within the next few weeks the site would announce a number of "local content sharing deals" with Australian content providers.


"We are on the verge of announcing some fairly huge stuff," he said.


MySpace has 3.8 million registered Australian users but its growth rate now lags well behind Facebook's, which earlier this year surpassed 200,000 Australian users.


But where Facebook's expansion is now being driven by third-party applications, which have rapidly expanded the functionality of the site, MySpace is looking to hold on to its users through new features such as MySpace TV and Instant Messenger.


Quarterlife, which will premier in seven languages on MySpace's global sites on November 11, delves into the lives of six people in their 20s and charts their "coming of age as a part of the digital generation".


The show was unashamedly written to appeal to today's tech-savvy youth - the central character, a young woman named Dylan, is a blogger whose video diary divulges a few too many of her friends' closest secrets.


It purports to be a "truthful depiction of the way young people speak, work, think, love, argue and express themselves".


To that end, Herskovitz and Zwick - the force behind My So-Called Life, thirtysomething, Legends of the Fall and Blood Diamond - will invite their audience to participate in the ongoing development of the series "through writing and video submissions".


There will be 36 episodes in total and the producers plan to create a mini social network around the show through a website, quarterlife.com. It will also have its own profile page on MySpace, which MySpace says will include bonus content such as character profiles, behind-the-scenes video footage and storyline secrets.


Herskovitz and Zwick said the fact Quarterlife was an independent project meant they had full "creative autonomy", which isn't always possible when producing shows for traditional TV networks.


"For better or worse, Quarterlife is truly our own vision," Herskovitz said.


The Quarterlife concept was originally conceived three years ago as a TV pilot called "¼ life", developed for the US network ABC. The project was axed due to "creative differences" between the producers and ABC, after which the script was completely rewritten for an internet audience.


"When Emmy award-winning producers come to MySpace TV - you know this is reaching a whole new level," Myspace CEO Chris DeWolfe said in a statement.


In the US, MySpace has already dabbled extensively in digital broadcasting, securing the rights to a number of smaller series and short clips including the web series Prom Queen, a teen-oriented serial drama made by a US studio owned by former Disney boss Michael Eisner.




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AMD with quad-core processor -Intel new invention


24hoursnews : Intel is aiming to extend its performance lead over AMD with the introduction of the industry's first quad-core processors designed for multi-processor servers.
The chip giant has rolled out six quad-core Xeon 7300 series processors, which deliver more than twice the overall performance and more than three times the performance per watt of its previous generation of dual-core server chips. The chips are the last to be converted to Intel's Core micro-architecture, a process that has been under way since 2006.
The 7300 series are more energy efficient than previous chips. It comprises chips that run at clock speeds of up to 2.93GHz at 130W, several 80W processors and a 1.8GHz, 50W version that is targeted specifically at four-socket blade servers.
In addition to having twice as many cores, the 7300 chips come with up to four times the memory capacity of the dual-core multi-processor platforms, which Intel maintained will allow businesses to consolidate their server environments to reduce space, power and running costs.
"Intel Xeon-based multi-processor servers are the backbone of the enterprise," said Tom Kilroy, Intel vice president and co-general manager of the digital enterprise group.
"With the Xeon 7300 series, Intel is delivering new levels of performance and performance per watt, and is driving the Intel Core micro-architecture into such innovative systems as four-socket, 16-core blades that use less energy than our older models."
The Xeon 7300 series means IT managers can pool their single, dual- and quad-core Core-based servers into a dynamic virtual server infrastructure that allows for live, virtual machine migration. This should improve situations including failover, load balancing, disaster recovery and server maintenance.
Brian Byun, VMware's vice president of global partners and solutions, said: "VMware and Intel have worked together to optimise VMware ESX Server on the Xeon 7300. Our partners and customers benefit from increased platform choice and performance headroom from the quad-core four-socket server systems."
Intel said that the 7300 series running the VMmark benchmark designed for measuring virtualisation performance, achieved the highest single server result so far. Results from key server manufacturers testing the 7300 series are also proving encouraging.
HP has proclaimed world-record results for a ProLiant DL580 G5 server running the TPC-C benchmark for database performance, while IBM claimed its 7300-based, System x3850 M2 server using the SPECint*_rate_base2006 benchmark for integer throughout, also set a new world record.
Intel claims silicon crown despite AMD Barcelonaa.


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AMD's Barcelona Chip to Get Speed Boost This Year.



On the same day that Advanced Micro Devices Inc. officially released its Barcelona server processor, the company said it would have a faster version of the quad-core Opteron device out by year's end.


Initially, the top clock speed on the quad-core chip is 2 GHz. But Randy Allen, vice president and general manager of AMD's server and workstation division, said at the Barcelona launch event here Monday evening that the company will have a 2.5-GHz version ready for shipment in December.


The confirmation of the planned speed bump may have been the most significant bit of news out of the product launch, which was held at the Letterman Digital Arts Center on the grounds of the Presidio, a former U.S. Army base that now is part of the Golden Gate National Recreation Area.


The announcement mostly featured a long list of executives from hardware vendors offering support and praise for AMD without taking any shots at its main processor rival, Intel Corp. That was left to AMD officials, but even they rarely if at all mentioned Intel by name.


Hector Ruiz, AMD's chairman and CEO, said the company's initial development in 2003 of an x86-compatible Opteron that could run both 32-bit and 64-bit applications raised the bar "for what an industry should expect from a processor company."


Ruiz claimed that the new Opteron would have "a similarly profound effect on computing," even though Intel turned the tables on AMD and beat it to market with quad-core processors by 10 months. Last week, Intel released a new Xeon 7300 line of quad-core chips with clock speeds of up to 2.93 GHz.


Executives from IBM, Hewlett-Packard Co., Sun Microsystems Inc. and Dell Inc. appeared at AMD's launch event in person or via video to announce plans to add the Barcelona chip to their server product lines, with shipments scheduled to begin as early as next month. Among them was Dell Chairman and CEO Michael Dell, who said his company intends to double its lineup of AMD-based systems by year's end.


Jonathan Schwartz, Sun's president and CEO, said his company is aiming to use the quad-core Opteron to double its AMD-based server business. However, Sun in January announced a deal with Intel to develop a full of line of Xeon-based servers and workstations. That ended a two-year-old strategy under which Sun had exclusively used Opterons in its x86 systems.





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