Category Archives:Technology

Aug. 02.

Scientists bend light the ‘wrong’ way

fiber optics - nist

Materials that bend light in unnatural ways are often touted as the path to futuristic technologies such as cloaking devices and super-powered lenses. But such materials are hard to make, but scientists have now discovered a simpler way using electrons.

At Harvard University’s School of Engineering and Applied Sciences, a team of researchers led by Hosang Yoon and Donhee Ham showed that using ordinary semiconductors and confining electrons to a two-dimensional plane they could make a material with a so-called negative refractive index that bends radio waves the “wrong” way, and does so a hundred times better than other methods.

refractive index is a measure of how much a material bends light. An index of 1 means no bending at all. Diamonds have that nice prism effect because they have an index of about 2.42, whereas air bends light hardly at all. Light – and that includes radio waves – bends because as it travels through anything other than a vacuum it slows down. Most materials always have a positive refractive index. That means that if light is approaching a denser, higher-index material from a lower-index one it gets bent to the right if the denser stuff is on that same side.

This all changes if the material has a negative index – as metamaterials do. In that case, the bend would be to the left. An object surrounded by a metamaterial would scatter the light away from it, making it invisible.
 
Fox News has the full article

Aug. 01.

‘Virtual bacteria’ created by scientists

Scientists have created a

Scientists have created a “virtual bacteria” which mimics the way the organism works, in a breakthrough which could improve our understanding of disease and help find new treatments.

The computer programme developed by researchers at Stanford University is an exact replica of the Mycoplasma genitalium bacterium, including its DNA and all the other components of its single cell.

The scientists hope that the simulation will help them explore the subtleties of how a cell works, unravel the genetic causes of disease, and predict how new therapies could prevent or treat illness.

Prof Markus Covert, who led the study published in the Cell journal, told the BBC: “The public hear about a new ‘cancer gene’ being discovered … cancer is not a one-gene problem.

“There are thousands of factors interacting in very complicated ways and for us to understand a disease like that, we really need to start going back and trying to see if we can understand the whole cell.”

 

Telegraph has the full article

Jul. 30.

NYPD to launch surveillance software system

MYFOXNY.COM -The NYPD says it will launch an all-seeing “Domain Awareness System” that combines several streams of information to track both criminals and potential terrorists.

Police Commissioner Raymond Kelly says the city developed the software with Microsoft.

The program combines city-wide video surveillance with law enforcement databases, according to Kelly.

The Domain Awareness System will include technology deployed in public spaces as part of the counterterrorism program of the NYPD counterterrorism bureau, including: NYPD-owned closed circuit television cameras, license plate readers, and other undisclosed domain awareness devices.

Kelly said the system will be officially unveiled by Mayor Michael Bloomberg sometime this week. Commissioner Kelly announced the program before an audience at the Aspen Security Forum in Aspen, Colo. over the weekend.

myfoxny has the full article

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Jul. 27.

Illegal Cloning? ‘Dumped fetuses could be half human, half engineered’

(multimedia) Hundreds of human fetuses, found in a forest in central Russia, may have been removed from a local medical university. Police are questioning a researcher, who was fired last year and could have taken the material she was working on with her. However, some doctors say the dumped fetuses could even be the product of cloning.

 

Jul. 25.

Your phone company is watching

(multimedia) What kind of data is your cell phone company collecting? Malte Spitz wasn’t too worried when he asked his operator in Germany to share information stored about him. Multiple unanswered requests and a lawsuit later, Spitz received 35,830 lines of code — a detailed, nearly minute-by-minute account of half a year of his life.

Jul. 23.

Artificial jellyfish created from heart cells

Artificial jellyfish

Scientists in the US have created a free swimming artificial jellyfish.

The team members built the replica using silicone as a base on which to grow heart muscle cells that were harvested from rats.

They used an electric current to shock the Medusoid into swimming with synchronised contractions that mimic those of real jellyfish.

The advance, by researchers at Caltech and Harvard University, is reported in the journal Nature Biotechnology.

The finding serves as a proof of concept for reverse engineering a variety of muscular organs and simple life forms.

Because jellyfish use a muscle to pump their way through the water, the way they function – on a very basic level – is similar to that of a human heart.

“I started looking at marine organisms that pump to survive,” said Kevin Kit Parker, a professor of bioengineering and applied physics at Harvard.

“Then I saw a jellyfish at the New England Aquarium, and I immediately noted both similarities and differences between how the jellyfish pumps and the human heart.

“The similarities help reveal what you need to do to design a bio-inspired pump.”

The work also points to a broader definition of “synthetic life” in an emerging field of science that has until now focused on replicating life’s building blocks, say the researchers.

Prof Parker said he wanted to challenge the traditional view of synthetic biology which is “focused on genetic manipulations of cells”. Instead of building just a cell, he sought to “build a beast”.

 

BBC has the full article

Jul. 16.

A vision of crimes in the future

(multimedia) http://www.ted.com The world is becoming increasingly open, and that has implications both bright and dangerous. Marc Goodman paints a portrait of a grave future, in which technology’s rapid development could allow crime to take a turn for the worse.

Jul. 16.

DARPA Demos Acoustic Suppression of Flame

(multimedia) Performers on DARPA’s Instant Fire Suppression program evaluated an acoustic approach to suppressing flames. In this video, a flame is extinguished by an acoustic field generated by speakers on either side of the pool of fuel. Two dynamics are at play in this approach. First, the acoustic field increases the air velocity. As the velocity goes up, the flame boundary layer, where combustion occurs, thins, making it easier to disrupt the flame. Second, by disturbing the pool surface, the acoustic field leads to higher fuel vaporization, which widens the flame, but also drops the overall flame temperature. As the same amount of heat is spread over a larger area, combustion is disrupted.
Read more at http://go.usa.gov/wu1

Jul. 05.

Maple Seed Drones Will Swarm The Future

Lockheed Martin's Samarai UAV on a testing field.

(multimedia) Imagine a cheap, tiny, hovering aerial drone capable of being launched with the flick of a person’s wrist and able to provide manipulable 360-degree surveillance views.

It’s real, it’s inspired by maple seeds, and the company behind it, Lockheed Martin, envisions a future in which swarms of the new drones can be deployed at a fraction of the cost and with greater capabilities than drones being used today by the military and other agencies.

 

TPM has the full article

Jul. 05.

Man and robot linked by brain scanner

IUT BeziersRobot avatars have got a step closer to being the real world doubles of those who are paralysed or have locked-in-syndrome.

Scientists have made a robot move on a human’s behalf by monitoring thoughts about movement, reports New Scientist.

The man-machine link joined a man in a brain scanner in Israel and a robot wandering a laboratory in France.

The person controlling the robot could also see through the eyes of his electronic surrogate.

The researchers are now working on ways to make the man-machine link more sensitive and to let people speak via the robot.

Mirror test

The research project connected a robot to a man having his brain scanned using fMRI (Functional Magnetic Resonance Imaging). This monitors blood flowing through the brain and can spot when areas associated with certain actions, such as movement, are in use.

Using brain scanners is a step beyond current efforts to link up men and machines. Much recent work involved teleoperated robots in which humans manipulate controls, such as joysticks, to make a robot move.

By contrast, the scanning approach is more subtle and attempts to fool the human subject into thinking that they are embodied in the robot.

The experiment helping to prove the technology works linked up student Tirosh Shapira who was in a lab at Bar-Ilan University, Israel, with a small two-legged robot thousands of kilometres away at Beziers Technology Institute in France.

Prior to connecting the two, researchers made Mr Shapira think about different sorts of movements and developed software that could quickly spot his intention.

The result, reported the magazine, was that he could control the robot in almost real time.

The illusion of embodiment was tested by surprising Mr Shapira with a mirror so he could see his robot self – a test that convinced him he was present in the French lab.

The next step for the research is to refine it to use a different type of scanning that can work using a skull cap rather than an fMRI machine that a person has to lie in. The robot used to represent a human is to be upgraded to a version that has a similar stature and gait to a real person.

The research is part of an international project called Virtual Embodiment and Robotic Re-Embodiment that aims to refine ways to link people and surrogates in both virtual environments and the real world.

Work is being done on medical applications of the technology but the researchers warned that it was a long way from being able to help anyone yet.

 

This is a copy of the full article found on BBC