Led by researchers at Harvard School of Public Health (HSPH) and the Institute for Bioengineering of Catalonia (IBEC), investigators found that epithelial cells — the type that form a barrier between the inside and the outside of the body, such as skin cells — move in a group, propelled by forces both from within and from nearby cells — to fill any unfilled spaces they encounter.… read more
June 25, 2013
Researchers at UC Santa Barbara in collaboration with University of Notre Dame have demonstrated the highest reported drive current on a transistor made of a monolayer of tungsten diselenide (WSe2), a 2-dimensional atomic crystal categorized as a transition metal dichalcogenide (TMD).
The discovery is also the first demonstration of an “n-type” WSe2 field-effect-transistor (FET), showing the tremendous potential of this material for future low-power and… read more
June 25, 2013
People on the cutting edge are swallowing ingestible smart pills containing minuscule sensors and transmitters to monitor a range of health data and wirelessly share this information with a doctor, The New York Times reports.
A pill made by Proteus Digital Health can track medication-taking behaviors, monitor how a patient’s body is responding to medicine, and detect the person’s movements and rest patterns.
People with heart… read more
June 24, 2013
The finding fills in a significant gap in the scientific understanding of how neurons mature and of some developmental brain disorders.
“Mutations that may affect this signaling pathway already have been found in some autism cases,” said TSRI… read more
A team based at Harvard University and the University of Illinois at Urbana-Champaign has printed precisely interlaced stacks of tiny battery electrodes, each less than the width of a human hair
3D printing can now be used to print lithium-ion microbatteries the size of a grain of sand. The printed microbatteries could supply electricity to tiny devices in fields from medicine to communications, including many that have… read more
June 24, 2013
A new technique enables the conversion of an ordinary camera into a light-field camera capable of recording high-resolution, multiperspective images.
Lytro photograph: click to refocus, double-click to zoom
(credit: Amara D. Angelica)
Computational photography is the use of clever light-gathering tricks and sophisticated algorithms to extract more information from the visual environment than traditional cameras can.
The first commercial application of computational photography is… read more
MIT researchers have proposed a new system that combines ferroelectric materials — the kind often used for data storage — with graphene, a two-dimensional form of carbon known for its exceptional electronic and mechanical properties.
The resulting hybrid technology could eventually lead to computer and data-storage chips that pack more components in a given area and are faster and less power-hungry.
The new system… read more
June 24, 2013
Researchers at MIT’s Computer Science and Artificial Intelligence Laboratory have developed a new algorithm that can accurately measure the heart rates of people depicted in ordinary digital video by analyzing imperceptibly small head movements that accompany the rush of blood caused by the heart’s contractions.
In tests, the algorithm gave pulse measurements that were consistently within a few beats per minute… read more
Using sodium instead of lithium (which is used in many rechargeable batteries) makes the battery environmentally benign. Also, while sodium doesn’t store energy as efficiently as lithium, its low cost and use of commonly available materials would make… read more
June 23, 2013
Unlike China and Europe, the U.S. has yet to adopt and fund an exascale development program.
Rep. Randy Hultgren (R-Ill.), who talked about China’s new 33.89-petaflop system, Tianhe-2, is finalizing a bill “that will push our nation toward exascale” — the American… read more
The researchers studied 19 groups of mammals that either are extinct or in decline from a past peak in diversity, as in the case of horses, elephants, rhinos and others.
The “Red Queen” hypothesis
The study was conducted… read more
The Society For Venturism has received the remaining $28,000 funding needed for cryopreservation of ALS patient Aaron Winborn at Cryonics Institute, according to Shannon Vyff, a director of the society (see “ALS patient hopes to be cryopreserved“).
A landmark three-dimensional (3-D) digital reconstruction of a complete human brain, called the BigBrain, shows for the first time the brain anatomy in microscopic detail — at a spatial resolution of 20 microns, smaller than the size of one fine strand of hair — exceeding that of existing reference brains presently in the public domain.
The new tool is made freely available to the broader scientific community to advance… read more
June 21, 2013
A USC research team has engineered microscopic probes that light up synapses in a living neuron in real time by attaching fluorescent markers onto synaptic proteins, without affecting the neuron’s ability to function.
The fluorescent markers allow scientists to see live excitatory and inhibitory synapses for the first time, and how they change as new memories are formed.
The synapses appear as bright spots along dendrites… read more
June 21, 2013
A new study examining the brains of fruit flies reveals a novel stem cell mechanism that may help explain how neurons form in humans.
“The question we confronted was ‘How does a single kind of stem cell, like a neural stem cell, make all different kinds of neurons?,’” said Chris Doe, a biology professor.
Researchers have known for some time that stem cells are capable of producing… read more