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Can anyone catch Khan Academy? The fate of the U in the YouTube era

July 23, 2012

salman_khan

Traditional American universities are suddenly running scared of YouTube, Xconomy reports, along with Vimeo, 5min, iTunes U, TED and the Internet Archive.

Without YouTube, Sal Khan and Khan Academy could never have reached his 4 million unique viewers a month with their 3,200 videos, viewed 170 million times.

Internet video sharing technology means that talented people from outside the education establishment can make and publish free educational videos that are… read more

Do you trust robots?

What's missing is human-factors studies, say MIT Professor Emeritus Thomas B. Sheridan
April 26, 2016

Baxter & programmer ft

Trust in robots is a critical component in safety that requires study, says MIT Professor Emeritus Thomas B. Sheridan in an open-access study published in Human Factors journal.

For decades, he has studied humans and automation and in each case, he noted significant human factors challenges — particularly concerning safety. He looked at self-driving cars and highly automated transit systems; routine tasks such as the delivery of packages… read more

Transistors without semiconductors

Breakthrough transistor design uses quantum tunneling at room temperature, solving the heat problem with existing FET transistor designs
June 29, 2013

gold quantum_dots_on_boron_nitride_nanotubes

Michigan Technological University scientists led by professor of physics Yoke Khin Yap have created a quantum tunneling device that acts like like an FET transistor and works at room temperature — without using semiconducting materials.

The trick was to use boron nitride nanotubes (BNNTs) with quantum dots made from gold.

When sufficient voltage is applied to the device, it switches from insulator to a conducting… read more

How to print 3D microstructures in seconds

September 14, 2012

fast_printed_3d_microstructures

Nanoengineers at the University of California, San Diego have developed a novel technology that can fabricate, in mere seconds, microscale three dimensional (3D) structures out of soft, biocompatible hydrogels.

Near term, the technology could lead to better systems for growing and studying cells, including stem cells, in the laboratory. Long-term, the goal is to be able to print biological tissues for regenerative medicine.

For… read more

Mystery material stuns scientists

It's a UV light, semiconductor, sensor, superconductor, ferromagnet, optoelectronic device. Just add water.
December 18, 2015

How does water on the surface of this material control UV light emission and conductivity? (credit: Mohammad A. Islam et al./Nano Letters)

In a remarkable chance landmark discovery, a team of researchers at four universities has discovered a mysterious material that emits ultraviolet light and has insulating, electrical conducting, semiconducting, superconducting, and ferromagnetic properties — all controlled by surface water.

It happened while the researchers were studying a sample of lanthanum aluminate film on a strontinum titanate crystal. The sample mysteriously began to glow, emitting intense levels of ultraviolet light from… read more

An ingredient in olive oil that appears to kill cancer cells

February 20, 2015

(credit: iStock)

A Rutgers nutritional scientist and two cancer biologists at New York City’s Hunter College have found that an ingredient in extra-virgin olive oil kills a variety of human cancer cells without harming healthy cells.

The ingredient is oleocanthal, a compound that ruptures a part of the cancerous cell, releasing enzymes that cause cell death.

Paul Breslin, professor of nutritional sciences in the … read more

Can cloud computing boost GDP?

November 15, 2012

Cloud_Computing

Gross domestic product (GDP) can be boosted by cloud computing, the system in which remote computers on the Internet are used to store, manage and process data rather than the users’ local machines, according to a report to be published in the International Journal of Technology, Policy and Management. 

The report suggests that governments should collaborate to boost the adoptionread more

Woman with quadriplegia feeds herself chocolate using mind-controlled robot arm

December 21, 2012

bmi-pittsburgh-sm

Reaching out to “high five” someone, grasping and moving objects of different shapes and sizes, feeding herself dark chocolate.

For Jan Scheuermann and a team of researchers from the University of Pittsburgh School of Medicine and UPMC, accomplishing these seemingly ordinary tasks demonstrated for the first time that a person with longstanding quadriplegia can maneuver a mind-controlled, human-like robot arm in seven dimensions (7D) to consistently… read more

A hydrogel that destroys superbugs and drug-resistant biofilms

Novel antimicrobial hydrogel prevents antibiotic-resistant microbes from forming on wounds, medical devices and implants
January 28, 2013

Biofilm after treatment (credit: IBN)

The first-ever antimicrobial hydrogel that can break apart biofilms and destroy multidrug-resistant superbugs upon contact has been developed by researchers from the Institute of Bioengineering and Nanotechnology (IBN) and IBM Research.

Tests have demonstrated the effectiveness of this novel synthetic material in eliminating various types of bacteria and fungi that are leading causes of microbial infections, and preventing them from developing antibiotic resistance.

This… read more

A genetically engineered weight-loss implant

Enjoy your Thanksgiving dinner --- they're working on it
November 28, 2013

implantable_slimming_aid

ETH-Zurich biotechnologists have constructed an implantable genetic regulatory circuit that monitors blood-fat levels. In response to excessive levels, it produces a messenger substance that signals satiety (fullness) to the body. Tests on obese mice revealed that this helps them lose weight.

According to the WHO, over half the population in many industrialized nations is overweight, one in three people extremely so, with high-calorie and fatty food a lifetime on… read more

Did ants invent the Internet?

The behavior of harvester ants as they forage for food mirrors the protocols that control traffic on the Internet
August 26, 2012

Pogonomyrmex barbatus (credit: Steve Jurvetson)

Two Stanford researchers have discovered that harvester ants determine how many foragers to send out of the nest in much the same way that Internet protocols discover how much bandwidth is available for the transfer of data.

The researchers are calling it the “anternet.”

Deborah Gordon, a biology professor at Stanford, has been studying ants for more than 20 years.

When she figured out how the… read more

We may all be Martians, says geochemist

It's likely that life came to Earth on a Martian meteorite; conditions suitable for the origin of life may still exist on Mars
August 30, 2013

mars_nasa_image

New evidence has emerged that supports the long-debated theory that life on Earth may have started on Mars.

Speaking at the at the annual Goldschmidt conference on Thursday, Professor Steven Benner from The Westheimer Institute for Science and Technology told geochemists that an oxidized mineral form of the element molybdenum, which may have been crucial to the origin of life, could only have been available… read more

Beyond LEDs: brighter, new energy-saving flat-panel lights based on carbon nanotubes

October 20, 2014

This image shows a planar light source device from the front. (Credit: N.Shimoi/Tohoku University)

Scientists from Tohoku University in Japan have developed a new type of energy-efficient flat light source, based on carbon nanotubes, with very low power consumption of around 0.1 Watt-hours of operation — about a hundred times lower than that of an LED.

In the journal Review of Scientific Instruments, the researchers detail the fabrication and optimization of the device, which is based on a phosphor screen and single-walled carbon nanotubes… read more

Optogenetics illuminates pathways of motivation and depression through brain

November 20, 2012

optogenetic fluorescence

Karl Deisseroth, MD, PhD, a professor of bioengineering and of psychiatry and behavioral sciences at Stanford University, and postdoctoral scholar Melissa Warden, PhD, have isolated the neurons that carry the split-second decisions to act, from the higher brain to the brain stem. In doing so, they have provided insight into the causes of severe brain disorders such as depression.

In organisms… read more

Brain frontal lobes not sole center of human intelligence

May 15, 2013

brain_lobes

The frontal lobes in humans vs. other species are not — as previously thought — disproportionately enlarged relative to other areas of the brain, according to a study by Durham and Reading universities.

It concludes that the size of our frontal lobes — an area in the brain of mammals located at the front of each cerebral hemisphere — cannot solely account for humans’ superior cognitive… read more

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