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[inhandnetworks-blog]

Curiosity Rover Samples Active Linear Dune on t industrial 4G/3G router  he Surface of Mars

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This view from the Mast Camera (Mastcam) on NASA’s Curiosity Mars rover shows two scales of ripples, plus other textures, in an area where the mission examined a linear-shaped dune in the Bagnold dune field on lower Mount Sharp in March and April 2017.

From February to April 2017, NASA’s Curiosity Mars Rover examined linear sand dunes to compare with what it found in 2015 and 2016 during an investigation of crescent-shaped dunes. This two-phase campaign is the first close-up study of active dunes anywhere other than Earth.

As it drives uphill from a band of rippled sand dunes, Curiosity is toting a fistful of dark sand for onboard analysis that will complete the rover’s investigation of those dunes.

Among the questions this Martian dune campaign is addressing is how winds shape dunes that are relatively close together, on the same side of the same mountain, into different patterns. Others include whether Martian winds sort grains of sand in ways that affect the distribution of mineral compositions, which would have implications for studies of Martian sandstones.

“At these linear dunes, the wind regime is more complicated than at the crescent dunes we studied earlier,” said Mathieu Lapotre of Caltech, in Pasadena, California, who helped lead the Curiosity science team’s planning for the duneGrid Analytics campaign. “There seems to be more contribution from the wind coming down the slope of the mountain here compared with the crescent dunes farther north.”

This 360-degree panorama was acquired by the Mast Camera (Mastcam) on NASA’s Curiosity rover looking out over part of an area called Bagnold Dunes, which stretch for miles on Mars. This location, called “Ogunquit Beach,” is on the northwestern flank of lower Mount Sharp. Points of interest include the dune’s ripples, and bedrock made from sediments deposited in lakes billions of years ago.

The linear dunes lie uphill and about a mile (about 1.6 kilometers) south from the crescent dunes. Both study locations are part of a dark-sand swath called the Bagnold Dunes, which stretches several miles in length. This dune field lines the northwestern flank of  Grid Analytics System  Mount Sharp, the layered mountain that Curiosity is climbing.

“There was another key difference between the first and second phases of our dune campaign, besides the shape of the dunes,” Lapotre said. “We were at the crescent dunes during the low-wind season of the Martian year and at the linear dunes during the high-wind season. We got to see a lot more movement of grains and ripples at the linear dunes.”

To assess wind strength and direction, the rover team now uses change-detection pairs of images taken at different times to check for movement of sand grains. The wind-sensing capability of the Curiosity’s Rover Environmental Monitoring Station (REMS) is no longer available, though that instrument still returns other Mars-weather data daily, such as temperatures, humidity and pressure. Two of the six wind sensors on the rover’s mast were found to be inoperable upon landing on Mars in 2012. The remainder provided wind information throughout the rover’s prime mission and first two-year extended mission.

A sample of sand that Curiosity scooped up from a linear dune is in the sample-handling device at the end of the rover’s arm. One portion has been analyzed in the Sample Analysis at Mars (SAM) instrument inside the rover. The science team plans to deliver additional sample portions to SAM and to the rover’s Chemistry and Mineralogy (CheMin) instrument.

This 360-degree scene from the Mastcam on NASA’s Curiosity Mars rover includes part of a linear-shaped dune the rover examined in early 2017 for comparison with what it found previously at crescent-shaped dunes. The view shows the dark, rippled surface of the active dune, near sedimentary bedrock.

One factor in choosing to drive farther uphill before finishing analysis of the scooped sand is the sta industrial router  tus of Curiosity’s rock-sampling drill, which has not been used on a rock since a problem with the drill feed mechanism appeared five months ago. Engineers are assessing how the use of vibration to deliver samples may affect the drill feed mechanism, which is used to move the drill bit forward and backwards. In addition, high winds at the linear-dunes location were complicating the process of pouring sample material into the entry ports for the laboratory instruments.

“A balky brake appears to be affecting drill feed mechanism performance,” said Curiosity Deputy Project Manager Steven Lee, of NASA’s Jet Propulsion Laboratory, Pasadena, California. “In some cases, vibration has been observed to change feed effectiveness, so we’re proceeding cautiously until we better understand the behavior. In the meantime, the engineering team is developing several methods to improve feed reliability.”

Curiosity landed near Mount Sharp in August 2012. It reached the base of the mountain in 2014 after successfully finding evidence on the surrounding plains that ancient Martian lakes offered conditions that would have been favorable for microbes if Mars has ever hosted life. Rock layers forming the base of Mount Sharp accumulated as sediment within ancient lakes billions of years ago.

On Mount Sharp, Curiosity is investigating how and when the ancient habitable conditions known from the mission’s earlier findings evolved into drier conditions that were less favorable for life.

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“Proximity Magnetism” Could remote communication   Be a Building Block for Quantum Computers

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This diagram shows the layered structure analyzed for its  Grid Analytics System magnetic properties. Yellow spheres represent tellurium atoms; light blue spheres represent antimony-bismuth; and black spheres represent sulfur. The black sphere with an arrow represents an atom of dopant, and green spheres with arrows show atoms of europium. Different colored arrows show various ways an europium ion can be affected by the interface between the materials: within the plane via Heisenberg interaction (orange), between the planes (green) through super-exchange interaction, or spin-polarized states at the topological insulator surface (blue).

Researchers reveal an unusual magnetic behavior that could be used to probe a variety of exotic physical phenomena, and could ultimately be used to produce key components of future quantum computers.

An exotic kind of magnetic behavior, driven by the mere proximity of two materials, has been analyzed by a team of researchers at MIT and elsewhere using a technique called spin-polarized neutron reflectometry.

The novel phenomenon occurs at the boundary between a ferromagnet and a type of material called a topological insulator, which blocks electricity from flowing through all of its bulk but whose surface is, by contrast, a very good electrical conductor. In the new work, a layer of topological insulator material is bonded to a ferromagnetic layer. Where the two materials meet, an effect takes place called proximity-driven magnetic order, producing a localized and controllable magnetic pattern at the interface.

The research is described in a paper appearing this week in the journal Physical Review Letters, written by MIT doctoral student Mingda Li, postdoc Cui-Zu Chang, professor of nuclear science and engineering Ju Li, senior scientist Jagadeesh Moodera, and seven others.

This “proximity magnetism” effect could create an energy gap, a necessary feature for transistors, in a topological insulator, making it possible to turn a device off and on as a potential building block for spintronics, says Mingda Li, the lead author of the paper. “However, the proximity effect is usually weak,” he says, without this team’s use of a magnetic topological insulator “to enhance it and lock new magnetic order near the interface.”

“This could be a building block of quantum computers,” Moodera says. “It also opens up some fundamental new phenomena” for study by physicists.

“The interaction at the interface makes this exotic phenomenon possible,” Chang adds.

O cloud VMS ne of the new findings of this research is that the magnetism induced by the proximity of the two materials is not just at the surface, but actually extends into the interior of the topological insulator material. “We were able to show that the magnetism exists inside the topological insulator,” Moodera says.

Possible applications of the new findings include the creation of spintronics, transistors based on the spin of particles rather than their charge. These are expected to have low energy dissipation if based on topological insulators, and are a very active area of research.

Because the interface produces a channel with virtually no dissipation, it can act as “a perfect quantum wire,” Ju Li says. “It cannot be better than that for a quantum conductance channel. So having this precise control of the magnetic structure could lead to novel quantum spintronics.”

He adds that the findings, in addition to near-term practical applications, “from a physics point of view, opens up a huge area of productive work.” This includes the study of predicted physical phenomena such as Majorana fermions, particles predicted in 1937 but not yet observed, which, unlike all known subatomic particles, serve as their own antiparticles. These theorized particles “have yet to be explored. It opens another avenue to explore these things,” he says.

“The significance of this work is threefold,” says Qi-Kun Xue, a professor of physics at Tsinghua University in China who was not involved in this work. The three areas, he says, are “to demonstrate proximity magnetism, the enhancement of such magnetism … and the tunability of this interfacial m wi fi  agnetic structure.” He adds that the finding is a significant step toward a device application of magnetic topological insulators. “In particular,” he explains, “the consistent results from independent experimental tools” make the results “robust.”

The work included researchers at the National Institute of Standards and Technology, Brookhaven National Laboratory, Northeastern University, and Boston College. It was supported by the National Science Foundation, the Office of Naval Research, and the Department of Energy.

Publication: Mingda Li, et al., “Proximity-Driven Enhanced Magnetic Order at Ferromagnetic-Insulator–Magnetic-Topological-Insulator Interface,” Phys. Rev. Lett., 2105, 115, 087201; doi:10.1103/PhysRevLett.115.087201

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Scientists Make 3D Objects Invisible to Microwave ipsec-vpn   Wavelengths

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After years of progress, scientists are now coming closer and closer to making real-world objects disappear from view. Researchers from the University of Texas at Austin have made a three-dimensional object disappear from view, from any angle, at microwave wavelengths.

This latest research used plasmonic meta-materials to make an 18-inch cylindrical tub iot  e invisible. It was published by Andrea Alu et al in this week’s New Journal of Physics. Objects are visible because light rays bounce off them, hitting our retinas and allowing our brains to process the information.

Meta-materials redirect light to conceal objects, but the actual cloaking is hard. Plasmonic meta-materials cancel out the light scattering from an object. Once a cylinder is coated with these kinds of materials, they block the light rays, meaning that it becomes invisible.

Previously, meta-mater industrial m2m  ials had been used to create a mirage-like effect using a panel of nanotubes that were electrically stimulated, bending the light rays. It’s a breakthrough, but before the plethora of applications are considered, researchers need to figure out how they can apply this to optical wavelengths, as their tests were performed with high-frequency wavelengths, like the microwave spectrum.

They’re pursuing their research, but making objects invisible isn’t their priority. The main application of these kinds of materials ATM Remote Diagnostic   is to improve biomedical imaging.

[via Wired, images by TechChunks and Geekologie]

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Plants May Not be Able to Keep Pace with Warm compact industrial router  ing Temperatures

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Charles Davis, a Harvard professor of organismic and evolutionary biology. Photo by Kris Snibbe/Harvard Staff Photographer

A team of researchers examined the relationship between global climate warming and the flowering of spring plants, finding that spring plants may continue to flower earlier and earlier until they reach a point where they miss their primary pollinators.

Record warmth in 2010 and 2012 resulted in similarly extraordinary spring flowering in the eastern United States — the earliest in the more than 150 years for which data is available — researchers at Harvard University, Boston University, and the University of Wisconsin have found.

“We’re seeing spring plants that are now flowering on average over three weeks earlier than when they were first observed — and some individual species that are flowering as much as six weeks earlier,” said Charles Davis, a Harvard professor of organismic and evolutionary biology and the study’s senior author. “That’s a dramatic advancement of spring. We have a long historic record that shows these are far and away the earliest flowering times on record for the eastern United States.

“When we looked at the data, I was stunned at just how early flowering was occurring,” Davis added. “It is striking, how early we’re seeing spring.”

To explain the early arrival, Davis and his colleagues point to temperature increases produced by global climate change. Using data collected in Massachusetts and Wisconsin from the mid-1800s to today, they show that the two warmest years on record — 2010 and 2012 — also included record-breaking early flowering. The study was published Jan. 16 in the journal PLoS One.

“Given what we know about historical trends in temperature and flowering times, the question has been whether the flowering dates we see today fall within expectations, and it appears that indeed the touchscreen vending y do,” Davis said. “It suggests that many spring plants haven’t hit some sort of breaking point — they just keep pushing things earlier and earlier.”

Many researchers believe that some plants have, or soon will, reach a point where they may not be able to keep pace with warming temperatures. For example, they may no longer meet their winter chilling requirements, which means that they may not get enough cool days to prepare them for spring. “With the several dozen species we looked at, that doesn’t yet appear to be occurring,” Davis said.

The possible consequences of plants reaching their limits are worrisome, to say the least.

“One potential negative consequence of early flowering is that these plants are adjusting to the point where important ecological associations are disrupted,” he continued. “One possibility is that they may shift so far that they simply miss their primary pollinators. The other aspect of this is that we don’t have a great sense of how this relates to variation among and between populations within these species. It could very well be that these species as a whole are being very negatively affected, and we’re just seeing the evidence of more resilient populations — in particular, those that are able to greatly adjust their flowering times.”

To conduct the study, Davis and colleagues relied on two “incredibly unique” data sets.

Henry David Thoreau initiated the first in Concord in the mid-19th century. Davis said, “Thoreau was making observations on flowering times across Concord for nearly a decade. We believe he may have been preparing a book to document the change in seasons in this region.”

Botanists in the early 1900s followed in Thore distribution power line monitoring  au’s footsteps, collecting similar data for more than a decade. Most recently, researchers from BU have continued this effort since 2005.

The second data set was initiated in the mid-1930s in central Wisconsin, with observations made by the environmental pioneer Aldo Leopold, then a faculty member at the University of Wisconsin. Other researchers made additional studies of flowering times in the 1970s.

“The striking finding is that we see similar patterns of earlier spring in Wisconsin and in Massachusetts,” Davis said. “It’s amazing that these areas are so far apart and we’re seeing the same things — it speaks to a larger phenomenon taking place in the eastern United States.”

Davis expressed hope  da monitoring  that the study will serve as a tangible example of the potential consequences of climate change.

“The problem of climate change is so massive, and I worry that the temptation is for people to tune out,” he said. “But I think being aware that this is indeed happening is one step in the right direction of being a good steward of our planet.

“On average, it’s about 3 degrees Celsius warmer today than when Thoreau studied Concord,” he continued. “When we talk about climate change, it can be difficult to grasp what it means when we talk about future increases in temperature. Humans may weather these changes reasonably well in the short-term, but many organisms in the tree of life will not likely fare nearly as well.”

Elizabeth R. Ellwood and Richard B. Primack, both from Boston University, Stanley A. Temple from the University of Wisconsin, Madison, and the late Nina L. Bradley of the Aldo Leopold Foundation contributed to the research.

Image: Kris Snibbe/Harvard Staff Photographer

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Lidar Equi fcc certified  pment Provides Comprehensive Pictures Earthquake Zones

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This 3-D airbo industrial router  rne light detection and ranging (lidar) oblique view of the Borrego Fault, taken from the post-earthquake topographic survey, shows a wide zone of numerous small faults that slice the ground surface and offset the floor of a desert wash surrounding the main fault. The various colors in the landscape represent elevation changes during the earthquake. Image generated in Crusta (keckcaves.org) with 2x vertical exaggeration.

Geologists are using new airborne lidar equipment to study earthquakes and provide comprehensive before-and-after pictures earthquake zones. The lidar (light detection and ranging) equipment can measure features in the surface height to within a few inches by bouncing laser pulses off the ground and measuring their reflection.

Geologists have a new tool to study how earthquakes change the landscape, and it’s giving them insight into how earthquake faults behave. In the Feb. 10 issue of the journal Science, a team of scientists from the United States, Mexico and China, including geophysicist Eric Fielding of NASA’s Jet Propulsion Laboratory, Pasadena, Calif., reports the most comprehensive before-and-after picture yet of an earthquake zone, using data from the magnitude 7.2 event that struck near Mexicali, northern Mexico in April 2010.

“This study provides new information on how rocks in and around fault zones are deformed during earthquakes,” said Fielding. “It helps scientists understand past events and assess the likelihood of future earthquakes in other complex systems of faults.”

False-color composite polarimetric image over the fault ruptures (red lines) of the April 2010 El Mayor Cucapah earthquake in northern Baja California, acquired Feb. 3, 2012 by NASA’s Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR), overlaid on a Google Earth map. The U.S.-Mexico border is shown by a yellow line extending horizontally across the upper third of the image. The Gulf of California is in the lower right. Gray circles denote large historical earthquakes, with yellow and orange dots show earthquakes within the last week and day, respectively. In the inset, taken from the central part of the fault rupture, greenish shades are rocks and gravel in the Cucapah Mountains, while purplish tones are smoother soil in the Mexicali valley to the east. This image will be combined with other images of the same area to be acquired during future flights in order to measure the motion of Earth's surface during the time between images using a technique called interferometry. The interferometric measurements will allow scientists to study the pressures building up and being released on faults at depth.

The team, working with the National Center for Airborne Laser Mapping, flew over the area with lidar (light detection and ranging), which bounces laser pulses off the ground and measures their reflection to determine the height of the surface. New airborne lidar equipment can measure features in the surface height to within a few inches. The researchers were able to make a detailed scan after the earthquake over about 140 square miles (363 square kilometers) in less than three days, said Michael Oskin, geology professor at the University of California, Davis. He is the lead author of the study, which was funded by the National Science Foundation, the U.S. Geological Survey, Consejo Nacional de Ciencia y Tecnología (Mexico) and NASA.

Oskin said that they knew the area had been mapped with lidar in 2006 by the Mexican government. When the earthquake occurred, Oskin and Ramon Arrowsmith at Arizona State University, Tempe, applied for and got funding from the National Science Foundation to carry out an immediate aerial survey of the previously mapped area.

This five-foot-high (1.5-meter-high) surface rupture, called a scarp, formed in just seconds along the Borrego fault during the magnitude 7.2 El Mayor Cucapah earthquake in northern Baja California on April 4, 2010. Topographic surveys of the surrounding landscape reveal the complexity of earthquake deformation, including how this fault interacted with adjacent faults and the surrounding volume of rock.

Co-authors John Fletcher and graduate student Orlando Teran from the Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) carried out a traditional ground survey of the fault rupture, which helped guide planning of the aerial lidar survey and the interpretation of the results. Fielding assisted in planning the lidar survey and in the final interpretation of the lidar measurements of the folding of the rocks near the fault.

By comparing pre- and post-earthquake surveys, the team members could see exactly where the ground moved and by how much.

The survey revealed deformation around the system of small faults that caused the earthquake and allowed measurements that provide clues to understanding how these multi-fault earthquakes occur.

The 2010 Mexicali earthquake did not occur on a major fault, like the San Andreas, but ran through a series of smaller faults in the Earth’s crust. These minor faults are common around major faults but are “underappreciated,” Oskin said.

“This sort of earthquake happens out of the blue,” he said.

The new lidar survey shows how seven of these small faults c router industrial  ame together to cause a major m2m   earthquake, Oskin said.

Since 2009, JPL has been flying its airborne Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) over the California border region to measure ground deformation in the area. UAVSAR, which flies on a NASA Gulfstream III aircraft, uses a different technique — interferometric synthetic aperture radar — to measure ground deformation over large areas to a precision of 0.1 to 0.5 centimeters (0.04 to 0.2 inches). UAVSAR flew repeat GPS-guided passes over the California side of the border region twice in 2009 and six times since the Baja quake, imaging it and its continuing deformation since.

Fielding said NASA recently secured approvals from the Mexican government and began flying UAVSAR south of the California border over the Baja California earthquake zone in February 2012. These flights will be conducted every three months to monitor fault movements.

Images: UC Davis; NASA-JPL/Caltech/USGS/Google Earth; Centro de Investigacion Cientifica y de Educacion Superior de Ensenada (CICESE)

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Ch remote communication  emical Traces From Intense Starbursts Shed Light on Cosmic History

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Fresh insight into intense star formation, or starburst, events such as the one shown in this artist’s impression are challenging scientists’ understanding of the Universe. ESO/M.Kornmesser

Fresh insight into how stars are formed is challenging scientists’ understanding of the Universe.

A study of intense starbursts – events in distant galaxies in which stars are generated hundreds or thousands of times faster than in our Milky Way – is changing researchers’ ideas Industrial IoT Solutions   about cosmic history. The findings will help scientists understand how galaxies in the early Universe evolve into those we see today.

Instead of observing the optical light from starbursts, which is obscured by enormous quantities of dust, scientists instead observed radio waves, measuring the relative abundances of different types of carbon monoxide gas.

They were able to differentiate between the gas expelled from massive stars, which shine very brilliantly for a short time, and that expelled from less massive stars, like o IoT Remote Monitoring  ur own Sun, which can shine steadily for billions of years.

Fresh insight into intense star formation events- – such as this gigantic star-forming region in the Large Magellanic Cloud galaxy — are challenging scientists’ understanding of the Universe. ESO

Applying this novel technique for the first time, astronomers found that stars born inside galaxies undergoing a powerful starburst tend to be massive. In this regard, these are very different from those born inside galaxies that build up their stars over billions of years.

Scientists verified their findings using powerful computer models based on the evolution of our Milky Way galaxy and by observing starburst galaxies in the early Universe, which formed within a few billion years of the Big Bang. Such young galaxies are unlikely to have undergone previous episodes of star formation, which might otherwise have confused the results.

Researchers collected their data using the powerful ALMA telescope in the high Atacama Desert in Chile.

The five-year study, published in Nature, was carried out by astronomers at the University of Edinburgh and the European Southern Observatory (ESO), working alongside experts in Italy and Greece. It was supported by the European Research Council.

The ALMA telescope is operated by a partnership of the ESO, the US National Science Foundation and the National Institutes of Natural Sciences of Japan, in cooperation with the Republic of Chile.

Dr Zhi-Yu Zhang, of the University of Edinburgh’s School of Physics and Astronomy, who led the study, said: “Traditional telescopes are of limited use when studying dusty starburst galaxies. We reached our results using a powerful new radio telescope, hunting for traces of chemical elements from past events. For astronomers, these are like fossils. The results challenge classical ideas about the formation of stars in galaxies across cosmic time.”

Professor Rob Ivison, of the University of Edinburgh’s School of Physics and Astronomy Remote Maintenance   and ESO, said: “Our findings lead us to question our understanding of cosmic history. Astronomers building models of the Universe must now go back to the drawing board, with yet more sophistication required.”

Publication: Zhi-Yu Zhang, et al., “Stellar populations dominated by massive stars in dusty starburst galaxies across cosmic time,” Nature (2018)

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USC Study Validates Large-Scale Quantum wordpress webdesign   Chip

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In a newly published study, researchers from USC confirmed that quantum effects are indeed at play in the first commercial quantum optimization processor.

Scientists demonstrated that the D-Wave processor housed at the USC-Lockheed Martin Quantum Computing Center behaves in a manner that indicates that quantum mechanics has a functional role in the way it works. The demonstration involved a small subset of the chip’s 128 qubits.

In other words, the device appears to b industrial transport  e operating as a quantum processor — something that scientists had hoped for but have needed extensive testing to verify.

The quantum processor was purchased from Canadian manufacturer D-Wave nearly two years ago by Lockheed Martin and housed at the Information Sciences Institute (ISI) based at the USC Viterbi School of Engineering. As the first of its kind, the task for scientists putting it through its paces was to determine whether the quantum computer was operating as hoped.

& security  ldquo;Using a specific test problem involving eight qubits, we have verified that the D-Wave processor performs optimization calculations [that is, finds lowest-energy solutions] using a procedure that is consistent with quantum annealing and is inconsistent with the predictions of classical annealing,” said Daniel Lidar, scientific director of the Quantum Computing Center and one of the researchers on the team. Lidar holds joint appointments at USC Viterbi and the USC Dornsife College of Letters, Arts and Sciences.

Quantum annealing is a method of solving optimization problems using quantum mechanics — at a large enough scale, potentially much faster than a traditional processor can.

Research institutions throughout the world build and use quantum processors but most only have a few quantum bits, or qubits.

Qubits have the capability of encoding the two digits of one and zero at the same time, as opposed to traditional bits, which can encode distinctly either a one or a zero. This property, called superposition, along with the ability of quantum states to “tunnel” through energy barriers, are hoped to play a role in helping future generations of the D-Wave processor to ultimately perform optimization calculations much faster than traditional processors.

With 108 functional qubits, the D-Wave processor at USC inspired hopes for a significant advance in the field of quantum computing when it was installed in October 2011 — provided it worked as a quantum information processor. Quantum processors can fall victim to a phenomenon called decoherence, which stifles their ability to behave in a quantum fashion.

The USC team’s research showed that the chip, in fact, performed largely as hoped, demonstrating the potential for quantum optimization on a larger-than-ever scale.

“Our work seems to show that, from a purely physical point of view, quantum effects play a functional role in information processing in the D-Wave processor,” said Sergio Boixo, first author of the research paper, who conducted the research while he was a computer scientist at ISI and research assistant professor at USC Viterbi.

Boixo and Lidar collaborated with Tameem Albash, postdoctoral research associate in physics at USC Dornsife; Federico Spedalieri, computer scientist at ISI; and Nicholas Chancellor, a recent physics graduate at USC Dornsife. Their findings have been published in Nature Communications.

The news comes just two months after the Quantum Computing Center’s original D InHandGo  -Wave processor — known commercially as the Rainier chip — was upgraded to a new 512-qubit Vesuvius chip. The computing center, which includes a magnetically shielded box that is kept frigid (near absolute zero) to protect the computer against decoherence, was designed to be upgradable to keep up with the latest developments in the field.

The new Vesuvius chip at USC is currently the only one in operation outside of D-Wave. A second such chip, owned by Google and housed at NASA’s Ames Research Center in Moffett Field, Calif., is expected to become operational later this year.

Next, the USC team will take the Vesuvius chip for a test drive, putting it through the same paces as the Rainier chip.

The research was supported by the Lockheed Martin Corp., the U.S. Army Research Office (grant number W911NF-12-1-0523), the National Science Foundation (grant number CHM-1037992), and the Army Research Office Multidisciplinary University Research Initiative (grant number W911NF-11-1-026).

Publication: Experimental signature of programmable quantum annealing,” Nature Communications 4, Article number: 2067; doi:10.1038/ncomms3067

Image: Nano Processor from Shutterstock

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New Yale Study Reveals That Gun  wireless  Violence is a ‘Contagious’ Social Epidemic

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This image is a graphical representation of the largest connected component of the network. Each node represents a unique individual. Red nodes identify subjects of a fatal or nonfatal gunshot injury; blue nodes represent people who were not subjects of gun violence. Data are from the Chicago Police Department.

New research from Yale University reveals how gun violence spreads over social networks through a process of social contagion.

Gun violence is often described as an epidemic or a public health concern, due to its alarmingly high levels in certain populations in the United States. It most often occurs within socially and economically disadvantaged minority urban communities, where rates of gun violence far exceed the national average. A new Yale study has established a model to predict how “contagious” the epidemic really is.

In a study published online on January 3 in the Journal of the American Medical Association, the researchers studied the probability of an individual becoming the victim of gun violence using an epidemiological approach.

Led by Andrew Papachristos, associate professor of sociology at Yale, the researchers analyzed a social network of individuals who were arrested during an 8-year period in Chicago, Illinois — a city that has rates of gun violence more than three times the national average. The team studied connections between people who were arrested together for the same offense, and found that more than 60% of all gun violence during this time period happened in “cascades” — or connected chains — through these particular social networks.

“We want to take this epidemic of gun violence out of the criminal justice paradigm and put it in a public health context that focuses on victims and the reduction of trauma,” says Papachristos, corresponding author on the study.

The study also determined that an individual within these social networks was at the greatest risk of being shot within a period of about 125 days after their “infector,” the person most responsible for exposing the subject to gun violence, was the subject of gun violence. These results provide evidence that gun violence is not just an epidemic, but it has specific network patterns that might provide plausible opportunities for interventions, notes Papachristos. “There is a real value in understanding the timing of these events as a way to identify victims, and where we can insert resources such as violence- and harm-reduction programs into these networks.”

“If we want to drop gun violence rates in this country, we have to care about the young men with criminal records who become victims of gun violence,” says Papachristos. “By and large these are young men of color who have criminal records. Their lives are worth saving.”

Other authors on the study included Ben Green ’14 and Thibaut Horel from Harvard University.

S ethernet switch  tudy: Ben Green, et al., “Mo remote PLC programming  deling Contagion Through Social Networks to E wireless networking  xplain and Predict Gunshot Violence in Chicago, 2006 to 2014,” JAMA Intern Med., 2017; doi:10.1001/jamainternmed.2016.8245

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