may the force be with you

The "skin" can sense temperature and pressure simultaneously

Japanese researchers have developed a flexible artificial skin that could give robots a humanlike sense of touch.

The team manufactured a type of "skin" capable of sensing pressure and another capable of sensing temperature.

These are supple enough to wrap around robot fingers and relatively cheap to make, the researchers have claimed.

The University of Tokyo team describe their work in the latest issue of the journal Proceedings of the National Academy of Sciences.

The materials they're using may not be completely novel but the integration appears to be something new Douglas Weibel, Harvard University

The researchers explain how pressure-sensing and temperature-sensing networks can be laminated together, forming an artificial skin that can detect both properties simultaneously.

Takao Someya, lead author on the latest research, previously developed a form of artificial skin capable of sensing pressure.

But the ability to sense temperature as well allows the scientists to more closely imitate the functions of human skin.

Someya and his colleagues used electronic circuits as pressure sensors and semiconductors as temperature sensors. They embedded these sensors in a thin plastic film to create a net-like matrix.

Organic materials

The transistors used in the circuits and the semiconductors both use "organic" materials based on chains of carbon atoms.

This makes them mechanically flexible and relatively inexpensive to fabricate.

"Both of those characteristics sound compelling. The material sounds like it could have lots of functions," Dr Douglas Weibel, of the department of chemistry and chemical biology at Harvard University told the BBC News website.

"The materials they're using may not be completely novel but the integration appears to be something new."

The University of Tokyo scientists say their breakthrough has the potential to improve how robots will function in the real world.

And they add that there is no need to stop at simply imitating the functions of human skin.

"It will be possible in the near future to make an electronic skin that has functions that human skin lacks," the researchers write in Proceedings of the National Academy of Sciences.

Future artificial skins could incorporate sensors not only for pressure and temperature, but also for light, humidity, strain or sound, they add.

"Business 2.0 reports on the possibility of Google building a national broadband network and giving Wi-Fi access to everyone in America. From the article: 'So once the GoogleNet is built, how would consumers connect for free access? One of the cheapest ways would be for Google to blanket major cities with Wi-Fi, and evidence gathered by Business 2.0 suggests that the company may be trying to do just that. In April it launched a Google-sponsored Wi-Fi hotspot in San Francisco's Union Square shopping district, built by a local startup called Feeva. Feeva is reportedly readying more free hotspots in California, Florida, New York, and Washington, and it's possible that Google may be involved.'"

source:http://slashdot.org/article.pl?sid=05/08/15/2229257&tid=217&tid=215

Researchers in Singapore have developed a paper battery that is powered by urine. Despite sounding gloriously silly, the breakthrough promises a cheap and disposable power source for home health tests for things like diabetes.

Research investment into developing smaller and cheaper chips to process information in disposable health tests has been significant, but they were still reliant on an external power source. The researchers at Singapore’s Institute of Bioengineering and Nanotechnology (IBN) think they have overcome this problem.

The battery is composed of paper, soaked in copper chloride, sandwiched between layers of magnesium and copper. The whole thing, once laminated in plastic, is just a millimetre thick, and 6cm by 3cm in size.

The researchers report that with just 0.2 millilitres of urine the battery will provide around 1.5 volts, with a maximum power output of 1.5 milli-Watts. The performance varies according to the geometry of the battery, and the materials used.

Dr. Ki Bang Lee, lead researcher, sees a big market for the battery. He argues that it could easily be integrated into biochip systems for "healthcare diagnostic applications", making it much easier for people to manage their own healthcare, only going to the doctor when absolutely necessary.

The research was published in the Journal of Micromechanics and Microengineering.

source:http://www.theregister.co.uk/2005/08/15/pee-powered_battery/