A central topic in spoken-language-systems research is what’s called speaker diarization, or computationally determining how many speakers feature in a recording and which of them speaks when. Speaker diarization would be an essential function of any program that automatically annotated audio or video recordings.
Massachusetts Institute of Technology researchers have developed a new microfluidic device that could speed the monitoring of bacterial infections associated with cystic fibrosis and other diseases. The new microfluidic chip is etched with tiny channels, each resembling an elongated hourglass with a pinched midsection. Researchers injected bacteria through one end of each channel, and observed how cells travel from one end to the other.
Life-threatening blood clots can form in anyone who sits on a plane for a long time, is confined to bed while recovering from surgery, or takes certain medications. There is no fast and easy way to diagnose these clots, which often remain undetected until they break free and cause a stroke or heart attack. However, new technology from Massachusetts Institute of Technology may soon change that.
About a dozen years ago, scientists discovered that a hormone called ghrelin enhances appetite. Dubbed the “hunger hormone,” ghrelin was quickly targeted by drug companies seeking treatments for obesity—none of which have yet panned out. Neuroscientists have now discovered that ghrelin’s role goes far beyond controlling hunger.
Any medical device implanted in the body attracts bacteria to its surface, causing infections and thrombosis that lead to many deaths annually. Devices can be coated with antibiotics and blood thinners, but these eventually dissolve, limiting their longevity and effectiveness. Now, Semprus BioSciences is developing a novel biomaterial for implanted medical devices that barricades these troublesome microbes from the device’s surface.
The number of patents issued for renewable-energy technologies has risen sharply over the last decade, according to new research from Massachusetts Institute of Technology and the Santa Fe Institute. The study shows that investments in research and development, as well as in the growth of markets for these products, have helped to spur this dramatic growth in innovation.
If you have stopped at a gas station recently, there is a good chance your auto has consumed fuel with ethanol blended into it. Yet the price of gasoline is not substantially affected by the volume of its ethanol content, according to a paper co-authored by an MIT economist. The study seeks to rebut the claim that widespread use of ethanol has reduced the wholesale cost of gasoline by $0.89 to $1.09 per gallon.
It was a result so unexpected that Massachusetts Institute of Technology researchers initially thought it must be a mistake: Under certain conditions, putting a cracked piece of metal under tension has the reverse effect, causing the crack to close and its edges to fuse together. The surprising finding could lead to self-healing materials that repair incipient damage before it has a chance to spread.
At first glance, Mars’ clouds might be mistaken for those on Earth. Given what scientists know about the Red Planet’s atmosphere, these clouds likely consist of either carbon dioxide or water-based ice crystals. But it’s difficult to know the precise conditions that give rise to such clouds without sampling directly from a Martian cloud. Researchers at Massachusetts Institute of Technology have now done the next-best thing.
Object recognition is one of the most widely studied problems in computer vision. But a robot that manipulates objects in the world needs to do more than just recognize them; it also needs to understand their orientation. Is that mug right-side up or upside-down? And which direction is its handle facing? To improve robots’ ability to gauge object orientation, a team is exploiting a statistical construct called the Bingham distribution.
Researchers at Massachusetts Institute of Technology, working with partners at NASA, have developed a new concept for a microscope that would use neutrons instead of beams of light or electrons to create high-resolution images. Among other features, neutron-based instruments have the ability to probe inside metal objects to learn details of their internal structure.
Scientists at Massachusetts Institute of Technology and the Univ. of Texas at Arlington have developed a new type of microscopy that can image cells through a silicon wafer, allowing them to precisely measure the size and mechanical behavior of cells behind the wafer. The new technology, which relies on near-infrared light, could help scientists learn more about diseased or infected cells as they flow through silicon microfluidic devices.
In a completely unexpected finding, Massachusetts Institute of Technology researchers have discovered that tiny water droplets that form on a superhydrophobic surface, and then “jump” away from that surface, carry an electric charge. The finding could lead to more efficient power plants and a new way of drawing power from the atmosphere, they say.
Pyrite, better known as “fool’s gold”, is a common, naturally occurring mineral. It holds promise as a high-tech material, but is also a byproduct of corrosion of steel in deep-sea oil and gas wells. Both its potential usefulness in devices and its role in corrosion are largely influenced by the fundamental electronic properties of its surface, which have remained relatively unexplored, until now.
Researchers at Massachusetts Institute of Technology’s Computer Science and Artificial Intelligence Laboratory and the Qatar Computing Research Institute have developed new tools that allow people with minimal programming skill to rapidly build cellphone applications that can help with disaster relief.
Scientists in Massachusetts Institute of Technology’s Center for Global Change Science have developed a highly detailed model that simulates levels of nitrous oxide emissions in different regions and ecosystems of the world. Based on local soil temperature and moisture content, some of the simulations were able to reproduce actual nitrous oxide measurements. From their simulations, the researchers discovered a surprising pattern.
Many viruses infect humans through mucosal surfaces. To help fight these viruses, scientists are working on vaccines that can establish a defense at mucosal surfaces. Vaccines can be delivered to the lungs via an aerosol spray, but are often cleared away before they can provoke an immune response. To overcome that, engineers have developed a new type of nanoparticle that protects the vaccine long enough to generate a strong immune response.
The U.S. economy retains myriad sources of innovative capacity; but not enough of the innovations occurring in America today reach the marketplace, according to a major two-year Massachusetts Institute of Technology study. The report found that potentially valuable innovations occur throughout the advanced manufacturing sector and in companies of all sizes, from multinational conglomerates to specialized “Main Street” firms.
Using low-frequency laser pulses, a team of researchers has carried out the first measurements that reveal the detailed characteristics of a unique kind of magnetism found in a mineral called herbertsmithite. In this material, the magnetic elements constantly fluctuate, leading to an exotic state of fluid magnetism called a “quantum spin liquid.”
Cancer cells metastasize in several stages—first by invading surrounding tissue, then by infiltrating and spreading via the circulatory system. Some circulating cells work their way out of the vascular network, eventually forming a secondary tumor. Now researchers have developed a microfluidic device that mimics the flow of cancer cells through a system of blood vessels. High-resolution time-lapse imaging captures the moment of metastasis.
Steam condensation is key to the worldwide production of electricity and clean water: It is part of the power cycle that drives 85% of all electricity-generating plants and about half of all desalination plants globally. So anything that improves the efficiency of this process could have enormous impact on global energy use. Now, a team of researchers at Massachusetts Institute of Technology says they have found a way to do just that.
Is your cable television on the fritz? One explanation, scientists suspect, may be the weather. The weather in space, that is. Massachusetts Institute of Technology researchers are investigating the effects of space weather on geostationary satellites, which provide much of the world’s access to cable television, Internet services and global communications.
Researchers have found a new family of materials that provides the best-ever performance in a reaction called oxygen evolution, a key requirement for energy storage and delivery systems. The materials, called double perovskites, are a variant of a mineral that exists in abundance in the Earth’s crust. Their remarkable ability to promote oxygen evolution in a water-splitting reaction is detailed in a paper appearing in Nature Communications.
Graphene is the new wonder material: Flexible, lightweight and incredibly conductive electrically, it’s also the strongest material known to man. In Nature Photonics, researchers describe a promising new application of graphene in photodetectors that would convert optical signals to electrical signals in integrated optoelectronic computer chips.
Siri and Watson may seem brainy in certain situations, but to build truly smart, world-changing machines, researchers must understand how human intelligence emerges from brain activity. To help encourage progress in this field, the National Science Foundation (NSF) recently awarded $25 million to establish a Center for Brains, Minds and Machines at the Massachusetts Institute of Technology (MIT).