science + technology news

Stretched neutrinos could span the universe

June 10, 2009

The most massive quantum-mechanical superpositions of three different mass-energy states of “relic” neutrinos produced by the big bang may have slowed down, stretching them across the universe as it expanded, according to calculations by George Fuller and Chad Kishimoto of the University of California, San Diego.

Stretching sensors may enable novel wearable electronics

May 15, 2011

sensor

A new stretching sensor that measures both pressure and stretch has been developed by researchers at the Fraunhofer Institute for Silicate Research ISC in Würzburg.

Made of  an elastomer material coated on both sides with flexible electrodes, the sensor is able to stretch to twice its area before tearing.

“The sensors could be used to design [a] smart safety system [for airbags] that can sense… read more

Stretching when zapped by an electric current, muscle chains could mobilize microbots

November 12, 2014

Actuation of microscale fibers by alternating-current electric fields: (a) Ordered fiber before application of the electric field. (b) Structure during application of the electric field. (Scale bar, 3 micrometers) (Credit: Aayush A. Shah et al./Nature Materials)

University of Michigan (UM) researchers have developed chains of self-assembling particles that could serve as electrically activated muscles that could move microbots (microscopic robots).

These microbots could come in handy in medicine, manufacturing, and other areas. But there are several challenges, like building the microbots and making them mobile.

For the mobile part, Michael Solomon, a UM professor of chemical engineering, and his group started with particles with… read more

Stretchy circuits promise elastic gadgets

March 28, 2008

University of Illinois at Urbana-Champaign researchers have made stretchable and flexible silicon and plastic integrated circuits that are just one crystal–1.5 microns–thick.

The circuits are designed so that the plastic, not the silicon, absorbs most of the stress when the chips are bent. Until now, integrated circuits have been limited by use of much thicker, brittle silicon wafers.

Strokable robot rabbit talks with touch

May 23, 2008

A pet robot developed at the University of British Columbia that communicates with humans only by touch is being used to probe the way haptics our emotional relationships.

Using pressure sensors, the Haptic Creature can detect the way it is touched or stroked. It can only respond with breathing movements of its body, inaudible purring vibrations, or by moving its ears.

But even those simple responses to touch… read more

Stroke Brain Fix

January 25, 2006

Brain researchers may have found a way to make stroke-damaged nerve cells re-grow.

They used an immune-system protein antibody to stop Nogo-A from binding to receptors on nerve cells. Without the inhibitory affect of Nogo-A, the injured nerve cells were able to re-grow, restoring lost movement to the front paws of the rats.

Neurologist Wendy Kartje from the Hines Veterans Administration Hospital in Illinois and her team was… read more

Stroke damage in mice overcome by training that ‘rewires’ brain centers

Study findings suggest physical and pharmacological solutions for human stroke victims
February 7, 2013

 

Mice can recover from physically debilitating strokes that damage the primary motor cortex, the region of the brain that controls most movement in the body if the mice are quickly subjected to physical conditioning that rapidly “rewires” a different part of the brain to take over lost function, Johns Hopkins researchers have found. The research uses precise, intense and early treatment.read more

Stroke patients show signs of recovery in stem-cell treatment trial

May 29, 2013

reNeuron

Encouraging interim data from the world’s first clinical trial examining the safety of neural stem cell treatment in ischemic stroke patients has been reported by researchers ahead of an application for Phase II trials.

Professor Keith Muir of the University of Glasgow, who is heading the trial of ReNeuron Group plc’s ReN001 stem cell therapy at the Southern General Hospital, Glasgow reported that… read more

Stroke risk increased by sleeping less than six hours a night; simple eye test could detect

June 12, 2012

OPA exam image hi rez

Habitually sleeping less than six hours a night predicts a significant increase in the risk of stroke symptoms, University of Alabama at Birmingham researchers found for middle-age to older adults of normal weight and at low risk for obstructive sleep apnea (OSA).

Their study followed 5,666 people for up to three years.

The participants had no history of stroke, transient ischemic attack, stroke symptoms or high risk for… read more

Strong Magnetism Creates Two-Dimensional Superconductivity

December 9, 2005

It should be possible to achieve stable superconductivity at higher temperatures by restricting electrons to two dimensions in space, University of Arizona physicist Andrei Lebed has shown.

Electrons will become completely two-dimensional within laboratory-produced magnetic fields that are between 200,000 times and a million times stronger (10 to 50 Tesla) than the magnetic field at the surface of the Earth, Lebed said.

In research published in the Dec.… read more

Stronger than a speeding bullet, but lighter

New tests of nanostructured material could lead to better armor against everything from gunfire to micrometeorites
November 9, 2012

rice_strong_material

While traditional shields have been made of bulky materials such as steel, body armor made of lightweight material such as Kevlar has shown that thickness and weight are not necessary for absorbing the energy of impacts.

Now, a new study by researchers at MIT and Rice University has shown that even lighter materials may be capable of doing the job just as effectively.… read more

Strongest Material Ever Tested

July 18, 2008
Illustration showning the one-atom-thick atomic structure of graphene (Jeffrey Kysar, Columbia University)

In a strain measurement using perfect samples of graphene, Columbia University researchers have confirmed that is the strongest material ever tested.

The finding provides evidence that graphene transistors could be the most effective material to withstand heat in future ultrafast microprocessors.

Structure deep within the brain may contribute to a rich, varied social life

December 27, 2010

Scientists have discovered that the amygdala, a small almond shaped structure deep within the temporal lobe, is important to a rich and varied social life among humans. The finding was published this week in a new study in Nature Neuroscience and is similar to previous findings in other primate species, which compared the size and complexity of social groups across those species.

“We know that primates who live in… read more

Structure of key control element behind protein misfolding identified

March 1, 2012

Berkeley Lab researchers at the Advanced Light Source have discovered a nucleotide-sensing loop that synchronizes conformational changes in the three domains of group II chaperonin for the proper folding of other proteins (credit: Berkeley Lab)

Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have determined the crystal structure of a critical control element within chaperonin, the protein complex responsible for the correct folding of other proteins, using the exceptionally bright and powerful x-ray beams of the Advanced Light Source.

Proteins are able to fold themselves into a dazzling multitude of shapes and forms that… read more

Stuck Pig

July 14, 2006

Gryonic suspension may be just a few years away from clinical trials on humans, based on successful suspended animation with hundreds of pigs for an hour at a time.

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