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Satellite image of the South China Sea with colors added to indicate the calculated vertical displacement of ocean layers near 200 meters deep, based on simulated model data and calculations run by Harper Simmons at the University of Alaska at Fairbanks a

Researchers Unravel Secrets of Colossal, Invisible Waves in Earth’s Oceans

May 18, 2015 11:10 am | by David L. Chandler, MIT | News | Comments

Detailed new field studies, laboratory experiments and simulations of the largest known “internal waves” in the Earth’s oceans — phenomena that play a key role in mixing ocean waters, greatly affecting ocean temperatures — provide a comprehensive new view of how these colossal, invisible waves are born, spread and die off. The paper is co-authored by 42 researchers from 25 institutions in five countries.

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Three papers discuss why this dress image is seen differently by different observers. Courtesy of Cecilia Bleasdale

What Colors are the Dress? Three Perspectives on Why the Image is seen Differently

May 15, 2015 3:57 pm | by Cell Press | News | Comments

When you look at this photograph, what colors are the dress? Some see blue and black stripes, others see white and gold stripes. This striking variation took the Internet by storm in February; now Current Biology is publishing three short papers on why the image is seen differently by different observers, and what this tells us about the complicated workings of color perception.

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Researchers show how to build a digital blind signature scheme under the assumption that they have an offline repository and are using quantum information.

Blind Signatures Using Offline Repositories Provide New Level of Security

May 15, 2015 3:35 pm | by World Scientific | News | Comments

In the new era of quantum computers, many daily life applications, such as home banking, are doomed to failure, and new forms of ensuring the confidentiality of our data are being study to overcome this threat. Researchers have taken a step in this direction and propose a quantum blind signature scheme, which ensures that signatures cannot be copied and that the sender must compromise to a single message.

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Emphasizing the less common classes in datasets leads to improved accuracy in feature selection.

Counterintuitive Approach Yields Big Benefits for High-dimensional, Small-sized Problems

May 15, 2015 3:04 pm | by Agency for Science, Technology and Research (A*STAR) | News | Comments

Extracting meaningful information out of clinical datasets can mean the difference between a successful diagnosis and a protracted illness. However, datasets can vary widely both in terms of the number of ‘features’ measured and number of independent observations taken. Now, researchers have developed an approach for targeted feature selection from datasets with small sample sizes, which tackles the so-called class imbalance problem.

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Autonomous Car Prototype Folds, Shrinks, Drives Sideways

Recap: The Week's Top Stories — May 8-14

May 15, 2015 2:34 pm | by Suzanne Tracy, Editor-in-Chief, Scientific Computing and HPC Source | News | Comments

In case you missed it, here's another chance to catch this week's biggest hits. Writing like a genius; the largest individual structure ever identified by humanity; imaging fascinating, wild and unpredictable thunder; a car prototype that folds, shrinks and drives sideways; a high-efficiency laser system to remove space debris from orbit; and more are among the latest top stories.

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Tecplot 360 EX 2015 Release 2 Visual Data Analysis Software

Tecplot 360 EX 2015 Release 2 Visual Data Analysis Software

May 15, 2015 10:07 am | Tecplot, Inc. | Product Releases | Comments

Tecplot 360 EX 2015 Release 2 is 10 times faster than the legacy (2013) version of Tecplot 360 at computational analysis and graphics rendering. Features include customizable color maps that allow users to understand variations in their data through the use of graphical point and click color options.

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Mapping World Air Traffic from Space -- Courtesy of ESA/DLR/SES – click to enlarge

Detecting and Mapping World Air Traffic from Space

May 15, 2015 9:51 am | by ESA | News | Comments

Aircraft positions are picked up by the Proba-V mini-satellite, using an experimental ADS-B receiver. These signals are regularly broadcast from aircraft, giving flight information such as speed, position and altitude. Proba-V has picked up upwards of 25 million positions from more than 15,000 separate aircraft. The team has identified more than 22,000 unique call signs, identifying more than 15,000 aircraft.

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Optibit took home both grand prizes from the 2015 MIT Clean Energy Prize. Shown here are (from left) Optibit team members Mark Wade and Alex Wright; Penni McLean Conner of Eversource; and Optibit team member Chen Sun. Courtesy of Michael Fein

Optical-chips Team Develops Way to Integrate Fiber Optics into Computer Chips

May 14, 2015 2:09 pm | by Rob Matheson, MIT | News | Comments

A team that aims to drastically boost the efficiency of computing with silicon chips took home both grand prizes at MIT’s CEP competition. They developed a way to integrate fiber optics — glass or plastic components that can transmit data using light waves — into computer chips, replacing copper wires that rely on electricity. Using light can drop energy usage about 95 percent in chip-to-chip communications and increase bandwidth tenfold.

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Illustration of the Fermi Gamma ray Space Telescope (FGST) map of the sky with the central band removed to block out gamma rays originating in the Milky Way. Gamma rays of different energies are represented by dots of various colors — red dots represent a

Left-handed Cosmic Magnetic Field could Explain Missing Antimatter

May 14, 2015 12:20 pm | by The Royal Astronomical Society | News | Comments

The discovery of a 'left-handed' magnetic field that pervades the universe could help explain a long standing mystery — the absence of cosmic antimatter. Planets, stars, gas and dust are almost entirely made up of 'normal' matter of the kind we are familiar with on Earth. But theory predicts that there should be a similar amount of antimatter, like normal matter, but with the opposite charge.

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The Hong Kong Polytechnic University (PolyU) has developed a novel computer-aided detection system for acute stroke using computer intelligence technology. Reading 80 to 100 computer images, the system is able to detect whether the patient was struck by i

Novel Computer Intelligence System Detects Acute Strokes

May 14, 2015 12:06 pm | by Hong Kong Polytechnic University | News | Comments

PolyU has developed a novel computer-aided detection system for acute stroke using computer intelligence technology. Reading 80 to 100 computer images, the system is able to detect whether the patient was struck by ischemic stroke or haemorrhagic stroke. The detection accuracy is 90 percent, which is as high as that conducted by specialists, but at a much reduced time from 10 to 15 minutes to just three minutes.

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Inner Eye: Retinal Whole Mount -- Courtesy of Nikon Small World -- 2014 Nikon Small World Honorable Mention -- Click to enlargeThis 40x image of a retinal whole mount, showing ganglion cell bodies and their axon bundles (red), astrocytes (green), and vasc

Inner Eye: Retinal Whole Mount

May 14, 2015 11:19 am | News | Comments

This 40x image of a retinal whole mount, showing ganglion cell bodies and their axon bundles (red), astrocytes (green), and vasculature (blue), received an honorable mention in the 2014 Nikon Small World Photomicrophotography Competition, which recognizes excellence in photography with the optical microscope. The photograph was taken using confocal microscopy.

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BigNeuron, a new project led by the Allen Institute for Brain Science, aims to streamline scientist’s ability to create 3-D digital models of neurons. Courtesy of Allen Institute for Brain Science

Digitizing Neurons: Project will convert 2-D Microscope Images into 3-D Models

May 14, 2015 9:46 am | by Oak Ridge National Laboratory | News | Comments

A new initiative designed to advance how scientists digitally reconstruct and analyze individual neurons in the human brain will receive support from the supercomputing resources at the Department of Energy’s Oak Ridge National Laboratory (ORNL). Led by the Allen Institute for Brain Science, the BigNeuron project aims to create a common platform for analyzing the three-dimensional structure of neurons.

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Researchers used methods from signal processing and text-mining to analyze the musical properties of songs. Their system automatically grouped the thousands of songs by patterns of chord changes and tone, allowing them to statistically identify trends wit

Big Data Analysis of Sounds Creates 50-year Evolutionary History of Music Charts

May 14, 2015 9:18 am | by Queen Mary University of London | News | Comments

Evolutionary biologists and computer scientists have come together study the evolution of pop music. Their analysis of 17,000 songs from the US Billboard Hot 100 charts, 1960 to 2010, is the most substantial scientific study of the history of popular music to date. They studied trends in style, the diversity of the charts, and the timing of musical revolutions.

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Using Chombo-Crunch to study turbulent flow past a sphere could help aerospace engineers optimize takeoff and landing patterns through more accurate prediction of aircraft wakes. Simulation: David Trebotich; VisIt

High-performance CFD: Novel New Code for Energy, Aerospace, Oil and Gas

May 13, 2015 2:57 pm | by Lawrence Berkeley National Laboratory | News | Comments

For more than a decade, mathematicians and computational scientists have been collaborating with earth scientists to break new ground in modeling complex flows in energy and oil and gas applications. Their work has yielded a high-performance computational fluid dynamics and reactive transport code dubbed Chombo-Crunch that could enhance efforts to develop carbon sequestration as a way to address Earth’s growing carbon dioxide challenges.

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Cloudy Earth -- NASA Earth Observatory image by Jesse Allen and Kevin Ward, using data provided by the MODIS Atmosphere Science Team, NASA Goddard Space Flight Center – click to enlarge

Cloudy Earth: Observation Averages from July 2002 to April 2015

May 13, 2015 2:31 pm | by Adam Voiland, with information from Steve Platnick and Tom Arnold, NASA | News | Comments

Decades of satellite observations and astronaut photographs show that clouds dominate space-based views of Earth. One study, based on nearly a decade of satellite data, estimated that about 67 percent of Earth’s surface is typically covered by clouds. This is especially the case over the oceans, where other research shows less than 10 percent of the sky is completely clear of clouds at any one time.

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