Author Topic: Technology and Science News  (Read 5232 times)

Offline shikra22

  • SHIKRA ... eik khatarnaak shikaari
  • T. Members
  • 7 Stars
  • *******
  • Posts: 34325
  • Reputation: +2/-3
  • Gender: Male
  • SHIKRA THE FLYING HUNTER
    • View Profile
Re: Technology and Science News
« Reply #24 on: April 03, 2013, 03:27:01 pm »
Source: http://www.newscientist.com/article/dn23337-dna-transistors-pave-way-for-living-computers.html

DNA Transistors Pave Way for Living Computers

Computers made from living cells, anyone? Two groups of researchers have independently built the first biological analogue of the transistor – an integral element of modern electronics.

It should make it easier to create gadgets out of living cells, such as biosensors that detect polluted water.

A transistor acts as a switch, converting electrical inputs into output signals via logic gates. Now, Drew Endy at Stanford University in California and colleagues have designed a transistor-like device that controls the movement of an enzyme called RNA polymerase along a strand of DNA, just as electrical transistors control the flow of current through a circuit.

A different enzyme acts as the input, which depending on the sequence of the logic gates, either stops or starts the flow of polymerase. The device can also amplify its flow, another important function of transistors, allowing them to power other components in the circuit.

Because combinations of transistors can carry out computations, this should make it possible to build living gadgets with integrated control circuitry.

A similar device has been built by Timothy Lu and colleagues at the Massachusetts Institute of Technology, but amplification gives Endy's device the edge.

Such devices will be key building blocks in cellular machines, says Paul Freemont at Imperial College London, who was not involved in either study.

For example, bacterial cells are good at detecting pathogens or chemicals, such as heavy metals, says Freemont. By redesigning the circuitry that a bacterium uses to sense things, we could produce cheap biosensors that monitor water quality. "Underpinning all of that will be these foundational components, like in electronics," he says.

For Endy, the applications are limited only by our imagination. He suggests we could one day have living bridges or buildings constructed by the self-directed growth of their natural materials, controlled by internal biological circuits, or even tiny medical "submarines" with on-board DNA computers navigating the inside of our bodies.
Iss shikray se koi parinda nahi bach sakta

YUM Stories

Re: Technology and Science News
« Reply #24 on: April 03, 2013, 03:27:01 pm »

Offline wajahat

  • T. Members
  • 6 Stars
  • ******
  • Posts: 29051
  • Reputation: +51/-60
  • Gender: Male
  • Tamashaai
    • View Profile
Re: Technology and Science News
« Reply #25 on: April 03, 2013, 03:30:32 pm »
V nice sharing mansoor bhai.
And it is possible
Andhera hai Buhat....
Aao Dil Jalate Hain

YUM Stories

Re: Technology and Science News
« Reply #25 on: April 03, 2013, 03:30:32 pm »

Offline shikra22

  • SHIKRA ... eik khatarnaak shikaari
  • T. Members
  • 7 Stars
  • *******
  • Posts: 34325
  • Reputation: +2/-3
  • Gender: Male
  • SHIKRA THE FLYING HUNTER
    • View Profile
Re: Technology and Science News
« Reply #26 on: April 03, 2013, 03:34:13 pm »
Source: http://www.indianexpress.com/news/worlds-first-solar-plane-impulse-to-fly-across-us/1096640/

World's First Solar Plane 'Impulse' to Fly Across US

A first of its kind ultra-lightweight plane powered completely by the sun is set to fly coast-to-coast this spring.

The Solar Impulse plane will stop in Dallas city in Texas during its historic cross-country journey that begins on May 1, its creators announced today.

The plane, which requires zero fuel and relies solely on solar panels and battery power, would be the world's first plane powered purely by solar energy.

The two Swiss pilots of the plane, Bertrand Piccard and Andre Borschberg, want to complete a flight from Moffett Field to New York City, after spending 10 years designing it.

It is expected to arrive in the Big Apple by early July and will stop in Phoenix (Arizona), Dallas-Ft. Worth, Washington DC and either Nashville (Tennessee), Atlanta (Georgia) or St. Louis along the way.

"It carries only one pilot and no passengers, but it carries a lot of message," Piccard said.

"Today we can't imagine having a solar plane with 200 passengers. But in 1903 it was exactly the same," he said, noting the sense of impossibility that surrounded the first airplane flight that took place that year.

"We don't know what's going to happen in the future, but we have to start and see where technology takes us," he said.

The US flight is the latest step towards the ultimate goal of Solar Impulse team; that of making a flight around the world by 2015.

The plane uses creative engineering and physics to harness the sun's energy for power even after the sun sets.
Iss shikray se koi parinda nahi bach sakta

Offline wajahat

  • T. Members
  • 6 Stars
  • ******
  • Posts: 29051
  • Reputation: +51/-60
  • Gender: Male
  • Tamashaai
    • View Profile
Re: Technology and Science News
« Reply #27 on: April 03, 2013, 03:41:11 pm »
Nice bro.
Wese bhai ap short mein urdu mein translate kr dia kro har koi english ko samj ni pata aur phr ye to kafi rich english hoti science ki.
Andhera hai Buhat....
Aao Dil Jalate Hain

Offline shikra22

  • SHIKRA ... eik khatarnaak shikaari
  • T. Members
  • 7 Stars
  • *******
  • Posts: 34325
  • Reputation: +2/-3
  • Gender: Male
  • SHIKRA THE FLYING HUNTER
    • View Profile
Re: Technology and Science News
« Reply #28 on: April 03, 2013, 03:41:26 pm »
Source: http://news.techeye.net/science/scientists-prove-learning-hurts-your-brain

Scientists Prove Learning Hurts Your Brain

A team of scientists based at UCSF has established a link between learning and brain damage. Researchers found that brain activity could lead to DNA damage within brain cells, and although the damage is repaired quickly, it might explain the mechanism behind some neurological diseases. So thanks a lot, mum, I told you nothing good would come of law school.
The DNA damage is negligible and it is quickly repaired, but in theory at least it is possible that too much brain activity could result in some physical damage to the nerve cells in your brain. Alcohol and drugs tend to kill brain cells faster than watching a political debate, so the learned among us are safe. Probably.
The researchers used genetically modified mice that were tailored made to mimic some mutations associated with early onset Alzheimer's disease. They found indications of brain damage went up when the brains of the mice were active, when they were given a new environment to explore. The control group of mice also showed signs of DNA damage, but at somewhat lower levels.
The scientists then tried to figure out whether the damage was caused solely be neural activity, by shining a bright light into the mice while they were anesthetised. That also worked and it seems the DNA damage is inflicted by neural activity. Then they tried using a range of inhibitors and found that the damage is caused by a single neural signalling molecule - glutamate.
Fortunately the researchers found that the damage usually repairs within a single day. However, if you want to stay on the safe side, we recommend watching a few extra hours of reality TV or joining the Tea Party.
Iss shikray se koi parinda nahi bach sakta

Offline shikra22

  • SHIKRA ... eik khatarnaak shikaari
  • T. Members
  • 7 Stars
  • *******
  • Posts: 34325
  • Reputation: +2/-3
  • Gender: Male
  • SHIKRA THE FLYING HUNTER
    • View Profile
Re: Technology and Science News
« Reply #29 on: April 03, 2013, 03:43:36 pm »
Source: http://www.voanews.com/content/major_advance_made_in_biological_computing/1631511.html

Stanford Scientists Place Computer Inside Cell

Researchers at Stanford University in California have taken the next step in genetically engineering a computer in a living cell’s DNA. Making cells “smarter” could have a wide range of medical and industrial applications.

Today’s electronic computers are built around vast numbers of transistors, etched into silicon wafers.

A transistor is basically a switch used to control the electrical current flowing through a wire. It can amplify the signal strength or turn it on or off.

Drew Endy and his Stanford colleagues have created what they call the transcriptor. Instead of electrical current, the device controls the flow of an enzyme - called R-N-A polymerase - along the DNA in a cell.

“If you imagine a DNA molecule like a wire, with this enzyme flowing along, what we’re going to do is we’re going to come in with a third signal, just like a transistor, and switch the DNA, such that the flow of the enzyme can either pass through the transcriptor or it gets blocked. And that’s it,” said Endy.

New places for computing

By using more than one transcriptor, the researchers were able to issue logical instructions, using concepts like “and” and “or” - concepts basic to silicon-based computers.

If biological computing has a future, Endy doesn’t see it embedded in your laptop or smart phone.

“We aren’t trying to replace silicon computers or mechanical computers, because they probably aren’t going to be as fast. They’re not going to be as raw-powerful. But they’re going to work in places that the existing computers we have don’t work. So it’s computing in a new space or a new place,” he said.

One place could be in agriculture. Endy gave an example of spirulina algae being grown in Thailand. It could be bio-engineered to change color if the water had heavy metals or other pollutants in it.

“And you’d get a warning saying, 'you know that batch of food you’re making isn’t safe for people to eat.'”

Food with computer apps

Applications involving human health may be further in the future, because of the need for careful safety testing. Endy said he could imagine foods with computing power that could diagnose the status of the digestive tract.

“[You] could have microorganisms of a sort-of biotic, coming from yogurt or something else, that would have a little bit of genetic sensing and logic and could be used to detect the disease state of your alimentary canal, your gut.”

Researchers also are looking at engineering human immune cells to give them a boost in the battle against cancer
Iss shikray se koi parinda nahi bach sakta

Offline shikra22

  • SHIKRA ... eik khatarnaak shikaari
  • T. Members
  • 7 Stars
  • *******
  • Posts: 34325
  • Reputation: +2/-3
  • Gender: Male
  • SHIKRA THE FLYING HUNTER
    • View Profile
Re: Technology and Science News
« Reply #30 on: April 03, 2013, 03:45:47 pm »
Source: http://www.siasat.com/english/news/new-kind-mini-supernova-discovered

New Kind of 'mini' Supernova Discovered

Supernovae were always thought to occur in two main "flavors" - a core-collapse supernova that is the explosion of a star about 10 to 100 times as massive as our Sun and a Type Ia supernova, which is the complete disruption of a tiny white dwarf.

Now, astronomers are reporting their discovery of a new kind of supernova called Type Iax. This new class is fainter and less energetic than Type Ia. Although both varieties come from exploding white dwarfs, Type Iax supernovas may not completely destroy the white dwarf.

"A Type Iax supernova is essentially a mini supernova. It's the runt of the supernova litter," said lead author Ryan Foley, Clay Fellow at the Harvard-Smithsonian Center for Astrophysics (CfA).

Foley and his colleagues identified 25 examples of the new type of supernova. None of them appeared in elliptical galaxies, which are filled with old stars. This suggests that Type Iax supernovas come from young star systems.

Based on a variety of observational data, the team concluded that a Type Iax supernova comes from a binary star system containing a white dwarf and a companion star that has lost its outer hydrogen, leaving it helium dominated. The white dwarf collects helium from the normal star.

Researchers aren't sure what triggers a Type Iax. It's possible that the outer helium layer ignites first, sending a shock wave into the white dwarf. Alternatively, the white dwarf might ignite first due to the influence of the overlying helium shell.

Either way, it appears that in many cases the white dwarf survives the explosion, unlike in a Type Ia supernova where the white dwarf is completely destroyed.

"The star will be battered and bruised, but it might live to see another day," said Foley.

Foley calculates that Type Iax supernovas are about a third as common as Type Ia supernovas. The reason so few have been detected is that the faintest are only one-hundredth as bright as a Type Ia.

"Type Iax supernovas aren't rare, they're just faint," explained Foley.

The Large Synoptic Survey Telescope, in which the CfA is a partner, could discover thousands of Type Iax supernovas over its lifetime.
Iss shikray se koi parinda nahi bach sakta

Offline wajahat

  • T. Members
  • 6 Stars
  • ******
  • Posts: 29051
  • Reputation: +51/-60
  • Gender: Male
  • Tamashaai
    • View Profile
Re: Technology and Science News
« Reply #31 on: April 03, 2013, 03:54:24 pm »
Source: http://www.voanews.com/content/major_advance_made_in_biological_computing/1631511.html

Stanford Scientists Place Computer Inside Cell

Researchers at Stanford University in California have taken the next step in genetically engineering a computer in a living cell’s DNA. Making cells “smarter” could have a wide range of medical and industrial applications.

Today’s electronic computers are built around vast numbers of transistors, etched into silicon wafers.

A transistor is basically a switch used to control the electrical current flowing through a wire. It can amplify the signal strength or turn it on or off.

Drew Endy and his Stanford colleagues have created what they call the transcriptor. Instead of electrical current, the device controls the flow of an enzyme - called R-N-A polymerase - along the DNA in a cell.

“If you imagine a DNA molecule like a wire, with this enzyme flowing along, what we’re going to do is we’re going to come in with a third signal, just like a transistor, and switch the DNA, such that the flow of the enzyme can either pass through the transcriptor or it gets blocked. And that’s it,” said Endy.

New places for computing

By using more than one transcriptor, the researchers were able to issue logical instructions, using concepts like “and” and “or” - concepts basic to silicon-based computers.

If biological computing has a future, Endy doesn’t see it embedded in your laptop or smart phone.

“We aren’t trying to replace silicon computers or mechanical computers, because they probably aren’t going to be as fast. They’re not going to be as raw-powerful. But they’re going to work in places that the existing computers we have don’t work. So it’s computing in a new space or a new place,” he said.

One place could be in agriculture. Endy gave an example of spirulina algae being grown in Thailand. It could be bio-engineered to change color if the water had heavy metals or other pollutants in it.

“And you’d get a warning saying, 'you know that batch of food you’re making isn’t safe for people to eat.'”

Food with computer apps

Applications involving human health may be further in the future, because of the need for careful safety testing. Endy said he could imagine foods with computing power that could diagnose the status of the digestive tract.

“[You] could have microorganisms of a sort-of biotic, coming from yogurt or something else, that would have a little bit of genetic sensing and logic and could be used to detect the disease state of your alimentary canal, your gut.”

Researchers also are looking at engineering human immune cells to give them a boost in the battle against cancer

I love computer engineering. Bs qismat mein ni tha warna aj khud iska hisa hota.
V nice info bro
Andhera hai Buhat....
Aao Dil Jalate Hain

Offline wajahat

  • T. Members
  • 6 Stars
  • ******
  • Posts: 29051
  • Reputation: +51/-60
  • Gender: Male
  • Tamashaai
    • View Profile
Re: Technology and Science News
« Reply #32 on: April 08, 2013, 07:56:48 pm »
Lenovo Thinkpad Twist is a hybrid device that can be used as a laptop or a tablet.
.
Lenovo ThinkPad Twist
Lenovo recently launched ThinkPad Twist, a hybrid device that can be used as a laptop or a tablet. The Twist runs Windows 8 and has a 12.5-inch touchscreen IPS display with a resolution of 1366x768 pixels.The Twist comes with third-generation Intel processors, up to 8 GB RAM and 500 GB storage. It also has a mini-HDMI port, a 2-MP webcam, and weighs 1.6 kg. Lenovo says the battery life is seven hours.
Andhera hai Buhat....
Aao Dil Jalate Hain

Offline m.weired

  • T. Members
  • 3 Stars
  • ***
  • Posts: 446
  • Reputation: +0/-0
  • Gender: Male
    • View Profile
Re: Technology and Science News
« Reply #33 on: April 18, 2013, 07:57:42 pm »
A Dream Mode Of Transportation

The Becker Cadillac Escalade SUV is sleek and functional mobile office. Its a businesspersons dream mode of transportation












hard fucker

Offline m.weired

  • T. Members
  • 3 Stars
  • ***
  • Posts: 446
  • Reputation: +0/-0
  • Gender: Male
    • View Profile
Re: Technology and Science News
« Reply #34 on: April 18, 2013, 08:02:02 pm »

Giant Cars Collection By Arab Sheik











hard fucker

Offline m.weired

  • T. Members
  • 3 Stars
  • ***
  • Posts: 446
  • Reputation: +0/-0
  • Gender: Male
    • View Profile
Re: Technology and Science News
« Reply #35 on: April 18, 2013, 08:09:40 pm »


15 Things You Didn't Know About Your Brain

hard fucker