Thursday, August 21, 2008

Darwin's Lab: Scientists on Brink of Creating Life -A Galaxy Classic

 

"When these things are created," Bedau added, "they're going to be so weak, it'll be a huge achievement if you can keep them alive for an hour in the lab," he said. "But them getting out and taking over, never in our imagination could this happen.

"We're talking about a technology that could change our world in pretty fundamental ways — in fact, in ways that are impossible to predict."

Darwin's Lab: Scientists on Brink of Creating Life -A Galaxy Classic

 

Never in my imagination, could one man, working for the US Government get control of anthrax and kill people with it.  I have to wonder about the controls on this system.

Robot Fly Could Unlock Secrets Of The Human Brain (from Sunday Herald)

One more step in understanding the Human brain.

THE HUMBLE

fruit fly may not look very clever, but its tiny brain has more in common with humans' than you might think - a fact that has encouraged scientists to attempt to create a "virtual fly brain" in the hope that it will lead to discoveries that could combat neurological diseases.

 

Robot Fly Could Unlock Secrets Of The Human Brain (from Sunday Herald)

 

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The Frontal Cortex : James and Measurement

This article seems to point at the inexactness of brain function.  This is the other side of the blue brain argument

Notice his emphasis on the inherent unknowability of the mind, the way so many of our thoughts and sensations are constantly falling into the "abyss of oblivion". This was, in part, a reaction to the psychology of the day, which was so eager to measure the mind and quantify our thoughts. James, on the other hand, was convinced that the most interesting aspects of the mind were inherently unmeasurable. As he wrote in his Principles, "It is, in short, the reinstatement of the vague to its proper place in our mental life which I am so anxious to press on the attention."

And here is how I describe this Jamesian attitude in my book:

James always enjoyed puncturing the pretensions of nineteenth century science. He thought that we should stop thinking of scientific theories as mirrors of nature, what he called "the copy version of truth". Instead, we should see its facts as tools, which "help us get into a satisfactory relation with experience." The truth of an idea, James wrote, is the use of an idea, its "cash-value." Thus, according to the pragmatists, a practical poet could be just as truthful as an accurate experiment. All that mattered was the "concrete difference" an idea produced in our actual lives.

But before he became a philosopher, William James was a psychologist. In 1875, he established one of the world's first psychological laboratories at Harvard. Though he was now part of the medical school, James had no intention of practicing "brass instrument psychology," his critical name for the new scientific approach that tried to quantify the mind in terms of its elemental sensations. What physicists had done for the universe, these psychologists wanted to do for our consciousness. Even their vocabulary was stolen straight from physics: thought had a "velocity," nerves had "inertia," and the mind was nothing but its "mechanical reflex-actions." James was contemptuous of such a crude form of reductionism. He thought its facts were useless.

James also wasn't very good at this new type of psychology. "It is a sort of work which appeals particularly to patient and exact minds," he wrote in his masterpiece, The Principles of Pscyhology, and James realized that his mind was neither patient nor particularly exact. He loved questions more than answers, the uncertainty of faith more than the conviction of reason. He wanted to call the universe the pluriverse. In his own psychological experiments, James was drawn to the phenomena that this mental reductionism ignored. What parts of our mind cannot be measured?

The Frontal Cortex : James and Measurement

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Thursday, August 14, 2008

Rise of the rat-brained robots - tech - 13 August 2008 - New Scientist Tech

 

This is no ordinary robot control system - a plain old microchip connected to a circuit board. Instead, the controller nestles inside a small pot containing a pink broth of nutrients and antibiotics. Inside that pot, some 300,000 rat neurons have made - and continue to make - connections with each other.

As they do so, the disembodied neurons are communicating, sending electrical signals to one another just as they do in a living creature. We know this because the network of neurons is connected at the base of the pot to 80 electrodes, and the voltages sparked by the neurons are displayed on a computer screen.

It's these spontaneous electrical patterns that researchers at the University of Reading in the UK want to harness to control a robot. If they can do so reliably, by stimulating the neurons with signals from sensors on the robot and using the neurons' response to get the robots to respond, they hope to gain insights into how brains function. Such insights might help in the treatment of conditions like Alzheimer's, Parkinson's disease and epilepsy.

Rise of the rat-brained robots - tech - 13 August 2008 - New Scientist Tech

 

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Monday, August 4, 2008

NASA Mars Phoenix Data More Negative On Potential For Life | SpaceRef - Your Space Reference

 

An initial soil test by the Microscopy, Electrochemistry, and Conductivity Analyzer (MECA) instrument indicated that the soil is highly Earth-like. The second test, however, is leading scientists to view the data as more inconclusive.

Other media outlets and websites around the world incorrectly reported that the "potential for life" meant that actual life on Mars had been detected. Coverage by Aviation Week states that the wet chemistry experiment can not detect life, nor can any other Phoenix instrument suchas the Thermal and Evolved Gas Analyzer (TEGA) organics experiment.

NASA disputes that any of the information was provided to the White House in advance. But such data are routinely passed between NASA and White House science staff when briefings are planned, as is the case with the new MECA data. A briefing is set for Aug. 5.

NASA Mars Phoenix Data More Negative On Potential For Life | SpaceRef - Your Space Reference

Rumors Abound About 'Potential for Life' on Mars | Wired Science from Wired.com

 

Rumors are flying this weekend that Mars Phoenix has made a major discovery relating to the potential for life on Mars.

Wired.com reached Sam Kounaves, the mission's wet-chemistry lab lead, by cellphone this morning. He quickly directed us to speak with NASA's PR representatives, but not before he said, simply, "Rumors are rumors."

They stem from an article in Aviation Week and subsequent pickup on Slashdot and elsewhere indicating that the White House had been briefed on the potential for life on the planet.

"The White House has been alerted by NASA about plans to make an announcement soon on major new Phoenix Lander discoveries concerning the "potential for life" on Mars," wrote Craig Covault, citing anonymous sources on the Phoenix Lander's wet-chemistry lab team.

Rumors Abound About 'Potential for Life' on Mars | Wired Science from Wired.com

 

This might be the first ripple of very big stuff.