science + technology news

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Summit supercomputer is world’s fastest

Will enable researchers to apply techniques like machine learning and deep learning to scientific discoveries that were previously impractical or impossible
June 12, 2018

(credit: Oak Ridge National Laboratory)

Summit — the world’s most powerful supercomputer, with a peak performance of 200,000 trillion calculations per second, or 200 petaflops* peak performance — was announced June 8 by the U.S. Department of Energy’s Oak Ridge National Laboratory (ORNL).

The previous leading supercomputer was China’s Sunway TaihuLight, with 125 petaflops peak performance.**

Summit will enable researchers to apply techniques like machine learning and deep learning… read more

roundup | AI powers cars, photos, phones, and people

June 8, 2018

(credit: Berkeley Deep Drive)

Huge self-driving-car video dataset may help reduce accidents

Berkeley Deep Drive, the largest-ever self-driving car dataset, has been released by BDD Industry Consortium for free public download. It features 100,000 HD videos on cars and labeled objects, with GPS and other data — 800 times larger than Baidu’s Apollo dataset. The goal: apply computer vision research — including deep reinforcement learning for object tracking — to… read more

Overcoming transistor miniaturization limits due to ‘quantum tunneling’

Breakthrough could jumpstart further miniaturization of transistors, possibly extending Moore's law
June 7, 2018

An illustration of a single-molecule device that blocks leakage current in a transistor. (credit: Haixing Li/Columbia Engineering)

A team of researchers at Columbia Engineering and associates* have synthesized a molecule that could overcome a major physical limit to miniaturizing computer transistors at the nanometer scale (under about 3 nanometers) — caused by “leakage current.”

Leakage current between two metal transistor electrodes results when the gap between the electrodes narrows to the point that electrons are no longer contained by their barriers — a phenomenon… read more

Ultrasound-powered nanorobots clear bacteria and toxins from blood

The U.S. Defense Threat Reduction Agency aims to create a broad-spectrum detoxification robotic platform
June 5, 2018

MRSA bacterium captured by a hybrid cell membrane-coated nanorobot (colored scanning electron microscope image). (credit: Esteban-Fernández de Ávila/Science Robotics)

Engineers at the University of California San Diego have developed tiny ultrasound-powered nanorobots that can swim through blood, removing harmful bacteria and the toxins they produce.

These proof-of-concept nanorobots could one day offer a safe and efficient way to detoxify and decontaminate biological threat agents — providing an fast alternative to the multiple, broad-spectrum antibiotics currently used to treat life-threatening pathogens like MRSA bacteria (an antibiotic-resistant staph strain). MRSA is… read more

Artificial sensory neurons may give future prosthetic devices and robots a subtle sense of touch

Artificial sensory nerve system combines a touch-pressure sensor, flexible electronic neuron, and artificial synaptic transistor modeled on human synapses
June 1, 2018

American and Korean researchers are creating an artificial nerve system for robots and humans. (credit: Kevin Craft)

Researchers at Stanford University and Seoul National University have developed an artificial sensory nerve system that’s a step toward artificial skin for prosthetic limbs, restoring sensation to amputees, and giving robots human-like reflexes.*

Their rudimentary artificial nerve circuit integrates three previously developed components: a touch-pressure sensor, a flexible electronic neuron, and an artificial synaptic transistor modeled on human synapses.

Here’s how the artificial nerve circuit works:… read more

New noninvasive technique could be alternative to laser eye surgery

Uses a low-powered, ultrafast laser to alter biochemical and biomechanical tissue properties without causing cellular damage or tissue disruption
May 31, 2018

correcting myopia ft

Columbia Engineering researcher Sinisa Vukelic, Ph.D., has developed a new non-invasive approach for permanently correcting myopia (nearsightedness), replacing glasses and invasive corneal refractive surgery.* The non-surgical method uses a “femtosecond oscillator” — an ultrafast laser that delivers pulses of very low energy at high repetition rate to modify the tissue’s shape.

The method has fewer side effects and limitations than those seen in… read more

First 3D-printed human corneas

Using donated stem cells, bio-ink formed the shape of a specific human cornea in less than 10 minutes; could ensure an unlimited supply of corneas in the future
May 31, 2018

3D-printing a human cornea (credit: Newcastle University)

Scientists at Newcastle University have created a proof-of-concept process to achieve the first 3D-printed human corneas (the cornea, the outermost layer of the human eye, has an important role in focusing vision).*

Stem cells (human corneal stromal cells) from a healthy donor’s cornea were mixed together with alginate and collagen** to create a “bio-ink” solution. Using a simple low-cost 3D bio-printer, the bio-ink was successfully… read more

Teaching robots to do household chores

Future goal is to allow robots to learn by simply watching a YouTube video
May 30, 2018

MIT's “VirtualHome” system aims to teach artificial agents a range of chores, including setting the table and making coffee. (credit: MIT CSAIL)

Computer scientists at MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL) and the University of Toronto* have created a Sims-inspired “VirtualHome” system that can simulate detailed household tasks.

The idea is to allow “artificial agents” to execute tasks — opening up the possibility of one day teaching robots to do such tasks.

Using crowdsourcing, the researchers created videos that simulate detailed household activities and sub-tasks in… read more

Advanced brain organoid could model strokes, screen drugs

Functional blood brain barrier allows for discovering and testing new drugs that can cross over into the brain
May 29, 2018

stroke damage to blood brain barrier ft

Wake Forest Institute for Regenerative Medicine (WFIRM) scientists have developed a 3-D brain organoid (tiny artifical organ) that could have potential applications in drug discovery and disease modeling.

The scientists say this is the first engineered tissue-equivalent to closely resemble normal human brain anatomy — containing all six major cell types found in normal organs, including neurons and immune cells.

The advanced 3-D organoids promote the formation of… read more

Ingestible capsule uses light-emitting bacteria to monitor gastrointestinal health

Ultra-low-power device in gut wirelessly transmits diagnostic signal to a cell phone; multiple gastrointestinal diagnoses possible
May 28, 2018

A sensor capsule that can be swallowed uses light-emitting, genetically engineered bacteria (right) to detect molecules that identify bleeding in the stomach or other gastrointestinal problems. Ultra-low-power electronics (left) sense the light and send the diagnostic information wirelessly to a cellphone. An Android app then analyzes the data. (credit: Lillie Paquette/MIT)

MIT engineers have designed and built a tiny ingestible biosensor* capsule that can diagnose gastrointestinal problems, and the engineers demonstrated its ability to detect bleeding in pigs.

Currently, if patients are suspected to be bleeding from a gastric ulcer, for example, they have to undergo an endoscopy to diagnose the problem, which often requires the patient to be sedated.

If the engineers can shrink the sensor capsule and… read more

High-quality carbon nanotubes made from carbon dioxide in the air break the manufacturing cost barrier

“The most valuable material ever sold”
May 24, 2018

CO2 to CNT conversion ft

Vanderbilt University researchers have discovered a technique to cost-effectively convert carbon dioxide from the air into a type of carbon nanotubes that they say is “more valuable than any other material ever made.”

Carbon nanotubes are super-materials that can be stronger than steel and more conductive than copper. So despite much research, why aren’t they used in applications ranging from batteries to tires?

Answer: The high… read more

Self-healing material mimics the resilience of soft biological tissue

Imagine first-responder robots that instantly heal themselves when damaged, or wires that continue to conduct electricity when cut
May 21, 2018

A self-healing material that spontaneously repairs itself in real time from extreme mechanical damage, such as holes cut in it multiple times. New pathways are formed instantly and autonomously to keep this circuit functioning and the device moving. (credit: Carnegie Mellon University College of Engineering)

Carnegie Mellon University (CMU) researchers have created a self-healing material that spontaneously repairs itself under extreme mechanical damage, similar to many natural organisms. Applications include bio-inspired first-responder robots that instantly heal themselves when damaged and wearable computing devices that recover from being dropped.

The new material is composed of liquid metal droplets suspended in a soft elastomer (a material with elastic properties, such as rubber). When damaged, the droplets… read more

Revolutionary 3D nanohybrid lithium-ion battery could allow for charging in just seconds [UPDATED]

Design also prevents fires in mobile devices
May 21, 2018

conventional vs. nanohyrid battery design ft

Cornell University engineers have designed a revolutionary 3D lithium-ion battery that could be charged in just seconds.

In a conventional battery, the battery’s anode and cathode* (the two sides of a battery connection) are stacked in separate columns (the black and red columns in the left illustration above). For the new design, the engineers instead used thousands of nanoscale (ultra-tiny) anodes and cathodes (shown in the illustration on the… read more

MIT’s modular plug-and-play blocks allow for building medical diagnostic devices

Small labs around the world will be able to cheaply and easily detect diabetes, cancer, and infectious diseases such as Zika virus
May 16, 2018

Tiny 1/2-inch low-cost “Ampli blocks” can be assembled to create diagnostic devices. The blocks, which simply consist of a tiny sheet of paper or glass fiber sandwiched between a plastic or metal block and a glass cover, snap together to form a diagnostic procedure. Some of the blocks contain channels for samples to flow straight through, some have turns, and some can receive a sample from a pipette, or mix multiple reagents (chemicals) together. The blocks are color-coded by function, making it easier to assemble pre-designed devices using instructions that the researchers plan to put online. (credit: MIT Little Devices Lab)

Researchers at MIT’s Little Devices Lab have developed a set of modular “plug-and-play” blocks that can be put together in different ways to produce medical diagnostic devices for detecting cancer and infectious diseases such as Zika virus.

The “Ampli blocks” require little expertise to assemble, and can test blood glucose levels in diabetic patients or detect viral infection, for example. They are inexpensive (about 6 U.S. cents for… read more

Brain-computer-interface training helps tetraplegics win avatar race

When humans actively participate with AI in improving performance
May 14, 2018

Pilot and avatar at Cybathlon (credit: Cybathlon)

Noninvasive brain–computer interface (BCI) systems can restore functions lost to disability — allowing for spontaneous, direct brain control of external devices without the risks associated with surgical implantation of neural interfaces. But as machine-learning algorithms have become faster and more powerful, researchers have mostly focused on increasing performance by optimizing pattern-recognition algorithms.

But what about letting patients actively participate with AI in improving performance?

To test that idea,… read more

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