Smartphones are capable of giving us directions when we’re lost, sending photos and videos to our friends in mere seconds and, perhaps very soon, diagnose our diseases in real time. Researchers in Texas are developing a disease diagnostic system made of a glass slide and a porous film of gold that offers results that could be read using only a smartphone and a $20 lens attachment.
Graphene is not the only ultrathin material that exhibits special electronic...
Although NASA’s Human Research Program has been...
Paleontologists studying fossilized feathers have proposed that the shapes of certain...
One of the concerns for astronauts during future extended spaceflights will be the onslaught of eye-damaging radiation, and plants that contain carotenoids would help mitigate that harm. According to a new study by researchers at the Univ. of Colorado Boulder, exposing leafy vegetables grown during spaceflight to a few bright pulses of light daily could increase the amount of eye-protecting nutrients produced by the plants.
Researchers have revived a giant virus more than 30,000 years old, recovered from the permafrost of northeast Siberia. It is a new kind of giant virus, joining a group that was first discovered 10 years ago. But the virus poses no threat to people, only amoebas.
In physics, there's small, and then there's nullity, as in zero-dimensional. Univ. of Cincinnati researchers have reached this threshold with a special structure, zero-dimensional quantum dots, that may someday lead to better ways of harnessing solar energy, stronger lasers or more sensitive medical diagnostic devices.
Researchers from ETH Zurich and the Univ. of Tubingen in Europehave recently described a process that suppresses the formation of methane in soils that are rich in humic substances. The soils act as a battery, releasing to and accepting electrons from soil bacteria depending on the presence of oxygen. The study shows that electron transfer to and from humic substances is an important process with global implications for methane release.
NASA on Wednesday confirmed a bonanza of 715 newly discovered planets outside our solar system. Scientists using the planet-hunting Kepler telescope pushed the number of planets discovered in the galaxy to about 1,700. Twenty years ago, astronomers had not found any planets circling stars other than the ones revolving around our sun.
Ultraviolet light (UV) has not only harmful effects on molecules and biological tissue like human skin but it also can impair the performance of organic solar cells upon long-term exposure. Researchers in Germany have now developed a so-called plasmonic metamaterial which is compatible with solar technology and completely absorbs UV light despite being only 20 nm thin.
If you’ve run out of drinking water during a lakeside camping trip, there’s a simple solution: Break off a branch from the nearest pine tree, peel away the bark and slowly pour lake water through the stick. The improvised filter should trap any bacteria, producing fresh, uncontaminated water. In fact, a team has discovered that this low-tech filtration system can produce up to 4 L of drinking water a day.
Visual acuity is sharpest for rats and mice when the animals are looking down. Researchers have found that rodents can learn tasks in a fourth to a sixth of the usual number of repetitions when visual stimuli are projected onto the floor of the maze rather than onto the walls.
The annual ritual of visiting a doctor’s office or health clinic to receive a flu shot may soon be outdated, thanks to the findings of a new study. The research, which involved nearly 100 people recruited in the metropolitan Atlanta area, found that test subjects could successfully apply a prototype vaccine patch to themselves.
Collaborative work by physicists has successfully "weighed" the mass of the electron 13 times more precisely than the best previous effort. The result, which could have an impact on our understanding of fundamental physical laws, was achieved using a method that could determine the presence of a mosquito on a jumbo jet just by weighing the airplane.
A Chinese-U.S. research team is exploring the use of metamaterials to create devices that manipulate sound in versatile and unprecedented ways. In a recently published paper, the team reports a simple design for a device, called an acoustic field rotator, which can twist wave fronts inside it so that they appear to be propagating from another direction.
Women with estrogen-responsive breast cancer who consume soy protein supplements containing isoflavones to alleviate the side effects of menopause may be accelerating progression of their cancer, changing it from a treatable subtype to a more aggressive, less treatable form of the disease, new research suggests.
To attach itself to surfaces, the marine sponge Monorhaphis chuni forms an unusual glass rod. Researchers have recently analyzed the nanostructure of the filament passing through the center of this glass rod and discovered that it is formed with a perfect periodic arrangement of nanopores. In this way, the sponge employs a similar method that is now used for fabrication of man-made mesoporous nanomaterials.
In a surprising new finding, researchers have discovered that bacterial movement is impeded in flowing water, enhancing the likelihood that the microbes will attach to surfaces. The new work could have implications for the study of marine ecosystems, and for our understanding of how infections take hold in medical devices.
Scientists in the U.K. have developed a novel approach to enabling collaborations between researchers at conferences and academic meetings: Treat them like genes. Using mathematical algorithms, the team created a method of matching conference-goers according to pre-set criteria, bringing about unforeseen collaboration opportunities while also enabling “would-like-to-meet” match-ups across disciplines and knowledge areas.
Computers don’t need to be error-free. They just need to correct their errors reliably, which means that controlling a quantum system is crucial to the function of a quantum computer. A research team has now found a way to control the quantum system of a diamond which has a few nitrogen impurities. They have used the system to perform a logic operation and error correction in a quantum register made from nuclear spins of the gemstone.
A team of Belgian researchers have made what may be the first optical circuit that uses interconnections that are not only bendable, but also stretchable. These new interconnections, made of a rubbery transparent material called PDMS, guide light along their path even when stretched up to 30% and when bent around an object the diameter of a human finger.
Screening more than 100 spider toxins, Yale Univ. researchers identified a protein from the venom of the Peruvian green velvet tarantula that blunts activity in pain-transmitting neurons. The findings, reported in Current Biology, show the new screening method used by the scientists has the potential to search millions of different spider toxins for safe pain-killing drugs and therapies.
An electrode designed like a pomegranate—with silicon nanoparticles clustered like seeds in a tough carbon rind—overcomes several remaining obstacles to using silicon for a new generation of lithium-ion batteries, say its inventors at Stanford Univ. and the SLAC National Accelerator Laboratory.
Inspired by the termites’ resilience and collective intelligence, a team of computer scientists and engineers at Harvard Univ. has created an autonomous robotic construction crew. The system needs no supervisor, no eye in the sky and no communication. Exhibiting a swarm-like intelligence, these robots, in any number, can cooperate simply by modifying their environment.
The heroes and villains in animated films tend to be on opposite ends of the moral spectrum. But they’re often similar in their hair, which is usually extremely rigid or straight and swings to and fro. It’s rare to see an animated character with bouncy, curly hair, since computer animators don’t have a simple mathematical means for describing it. That is, until now.
A team in France has greatly miniaturized the light-emitting diode (LED) by creating one from a single polythiophene wire placed between the tip of a scanning tunneling microscope and a gold surface. This nanowire, which is made of the same hydrogen, carbon and sulfur components found in much larger LEDs, emits light only when the current passes in a certain direction.
Plastic shopping bags, an abundant source of litter on land and at sea, can be converted into diesel, natural gas and other useful petroleum products, researchers report. The conversion produces significantly more energy than it requires and results in transportation fuels that can be blended with existing ultra-low-sulfur diesels and biodiesels. Other products, such as natural gas and gasoline also can be obtained from shopping bags.
Once the snow melts, the bee population will be back in business pollinating and making honey. A new study by scientists in Canada reveals that some these bees use bits of plastic bags and plastic building materials to construct their nests. The discovery reveals how urban bee populations have adapted to a human-dominated world.
Strange events have long been linked to nights of a full moon, though careful scrutiny dispels any association. So, when signals bounced off the lunar surface returned surprisingly faint echoes on full moon nights, scientists sought an explanation in reason rather than superstition. Still, the most compelling evidence arrived during another event that once evoked irrational fears, on a night when Earth's shadow eclipsed the full moon.
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