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A sleepy Cotswold town could be about to witness the genocide of local honey bees following the discovery of invasive predatory giant Asian hornets.…
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Thomas Belt Scientist of the Day
Thomas Belt, an English mining engineer, naturalist, and explorer, died Sep. 21, 1878 (we do not know his date of birth).
By Gary Grider
Tucked in the foothills of the Jemez mountains in northern New Mexico, among the ponderosa pines and endless blue skies, sits one of the world's fastest computers. Trinity is a 42-petaflop supercomputer (that's one quadrillion floating point operations per second, in case you're counting) that resides at Los Alamos National Laboratory and can perform complex 3D simulations of everything from ocean currents to asteroid impacts.
While a remote mountain town might seem to be an odd place for this computer to call home, it makes sense when you consider Los Alamos' history. Founded during World War II as the location of the top-secret Manhattan Project, scientists toiled away to build the first atomic bomb. What they didn't realize is that, in the process, they were pioneering the advent of Big Science. Today, Big Science brings together theory, modeling, experiments that produce massive amounts of data, and supercomputers to run incredibly sophisticated simulations providing feedback and validation to those theories and models. When J. Robert Oppenheimer led his all-star team of scientists to unravel the secrets of the atom, they were embarking on an integrated research program at a scale the world had rarely seen.
Computers were here from the start. During the war years, the term “computers” applied to mathematicians—mostly women—who worked the differential equations by hand, with help from mechanical desktop calculators and simple punch-card machines from IBM. These were the first steps in the process of inventing how to use computers. Los Alamos scientists went on to run the first production job on the world's first general-purpose electronic digital computer, ENIAC, and Nicholas Metropolis spearheaded development of the Lab's own computer, playfully dubbed MANIAC, in 1952, to continue the work of modeling nuclear processes.
Working with corporate collaborators, the Lab has been stretching the boundaries of computing ever since, with innovation following innovation as the Lab's computers often topped the list of the fastest in the world. In 2008, the Lab's Roadrunner supercomputer became the first to break the petaflop barrier, processing a thousand million floating point operations each second. That kind of speed enables resolution in simulations that would have been unimaginable 70 years ago. In a global ocean climate model, for example, scientists can look at individual eddies in an ocean current. (See image below.)
None of these computers were “plug and play.” For each one, the Lab and its corporate partners developed new software and hardware to make it run. Those innovations benefitted public and private computer users everywhere, from how best to network very large clusters of computer processors to how to manage the data they produced.
Roadrunner's petaflop speed, for instance, was spinning out data at unprecedented rates during simulations running many months. Storage technology in that era struggled to keep up with the technology's ability to generate and consume data. During long-running calculations at very large scale, with thousands of processors operating for weeks to months, failures occur—several per day, potentially. A method for dealing with this recurring and somewhat random failure is checkpoint-restart, where the application periodically saves a snapshot of its current state to guard against impending failure. The program can restart from these checkpoints and thereby continue for long periods, making forward progress towards a meaningful scientific result.
If the stable storage that holds checkpoints is too slow, then computing time is lost either through spending too much time checkpointing, which bogs down the program, or by not checkpointing, which amplifies the effect of each failure.
The challenge intensified with Trinity, with its Cray architecture and two kinds of Intel processors. When fully installed, it will run about 40 times faster than Roadrunner and has memory roughly equal to the amount of memory of all the laptops in New Mexico. That performance would only make the check-point problems worse. But several years ago, we invented burst buffers, paving the way for Trinity. Using solid-state flash memory, similar to memory in the average smart phone, burst buffers take the rapid-fire data off the supercomputer processors and dole it out to slower disk drives while keeping the data handy for a restart. Performance improves, and flash memory for burst buffers is cheaper when bandwidth, basically access speed, is taken into account compared to disk drives.
Burst buffers were installed for the first time on Trinity to support its crucial nuclear stockpile simulations. Other Department of Energy laboratories, academia, corporations, and European supercomputer user sites are rapidly adopting this new technology. Our software engineers also went on to develop another storage tool that allows supercomputers to save extremely large data sets for years on relatively inexpensive devices similar to those used by cloud-based businesses like Amazon. Cloud-style inexpensive disk storage had not been applied to high performance computing before.
Trinity and these storage tools continue the tradition of close collaboration between Los Alamos and computer vendors on the very latest developments in computing technology. Big Science and its constant companion, Big Data, rely on the most advanced computers to simulate how the world works or to solve a mystery whose solution hides in a vast sea of data. We take on challenges at a grand scale, from climate modeling to genetics, earthquakes to cancer, black holes to nuclear physics—work that tests the limits of computing superpower. The computing innovations we develop to solve these problems gives others the tools to address more everyday problems, such as by simulating a car crash as a means of improving real-world safety—research that ultimately enriches everyone's life.
Gary Grider is division leader of High Performance Computing at Los Alamos National Laboratory and a recognized international expert on supercomputing.
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Archaeologists have found the glassy remains of burnt cheese in an ancient pot. It seems trial and error is a timeless method to the madness of creating good food.
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Remnants of extinct monkeys are hiding inside you, along with those of lizards, jellyfish and other animals. Your DNA is built upon gene fragments from primal ancestors. Now National Science Foundation-funded researchers have made it more likely that ancestral genes, along with ancestral proteins, can be confidently identified and reconstructed. They have benchmarked a vital tool that would seem nearly impossible to benchmark. The newly won confidence in the tool could also help scientists use ancient gene sequences to synthesize better proteins to battle diseases.
Image credit: Georgia Tech/Rob Felt
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A McChord Air Force Base crewmember poses in front of a U.S. Air Force Base C-17A Globemaster jet out of McChord AFB, Washington, parked during sunrise at Pegasus Runway, McMurdo Station, Ross Island, Antarctica. McMurdo is one of three U.S. research stations on Antarctica. The National Science Foundation operates them all. In addition to maintaining three U.S. research stations on the continent, the National Science Foundation's U.S. Antarctic Program (USAP) supports research projects in an array of scientific disciplines, including for example, aeronomy and astrophysics, biology and medicine, geology and geophysics, glaciology, and ocean and climate systems. Outreach such as the Antarctic Artists and Writers program and education programs are also supported. For more information about USAP, visit the program's website here.
Image credit: Major Steve Mortensen/McChord AFB, National Science Foundation
The European Space Agency (ESA) has held an hour-long hangout to explain what's likely to happen when its Rosetta spacecraft touches down on Comet 67p.…
The first space station lofted into orbit by China is coming down next year, the country's space agency has confirmed.…
Georg Markgraf Scientist of the Day
Georg Markgraf, a German astronomer and naturalist, was born Sep. 20, 1610.
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-- This feed and its contents are the property of The Huffington Post, and use is subject to our terms. It may be used for personal consumption, but may not be distributed on a website.
Video The ancient shipwreck off the Greek island of Antikythera has already yielded up archeological wonders but now marine archeologists have found a body buried in the wreck that could yield up some clues as to the ship's origins.…
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A new research paper tells a story of the grasshopper and the bullfrog, but it's no children's tale. Instead, it describes biomechanical simulations that help to explain why the two jumping animals have very different stiffnesses in the springs -- tendons in the frogs and tendon counterparts called apodemes in the grasshoppers -- that store energy for their leaps. The difference, the science suggests, is the time they typically take before they take off.
Image credit: AtelierMonpli (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0), CC0, Public domain or Beerware], via Wikimedia Commons
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Stunning to view against a summer sky, NSF's Gemini North telescope atop Maunakea in Hawaii is one of two identical telescopes that make up the Gemini Observatory. Together, the telescopes scan the entire sky over both hemispheres. Their identical 8-meter mirrors are the only ones in the world coated with silver rather than the more commonly used aluminum. This approach permits the telescopes to observe visible light, as well as increasing their sensitivity to heat generated by objects in space. The Gemini Observatory is an international collaboration between the U.S., Canada, Brazil, Argentina and Chile.
Image credit: Gemini Observatory
The Chandra space telescope has spotted X-rays emanating from Pluto.…
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