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InTheLoop | 04.07.2014

April 7, 2014

To Bridge LEDs’ Green Gap, Scientists Think Small…Really Small

Nanostructures half the breadth of a DNA strand could improve the efficiency of light emitting diodes and help solve the most daunting problem facing ambient LED lighting today: the green gap. Using NERSC’s Cray XC30 supercomputer “Edison,” University of Michigan researchers calculated that the semiconductor indium nitride (InN), which typically emits infrared light, should emit green light if reduced to 1 nanometer-wide wires. Moreover, just by varying their sizes, these nanostructures could be tailored to emit different colors of light, making it practical to mix red, green and blue LEDs to make white light that could be dynamically  "tuned" to cooler or warmer hues. Their study will appear on the July cover of Nano Letters featuring a visualization by Burlen Loring. »Read more

100 Gbps Test Link Sets Pace for Faster Trans-Atlantic Data Transfers

Data transfers from the Large Hadron Collider at CERN in Switzerland to sites in the U.S. have historically taken different paths – 15 in all – via 10 gigabit-per-second (Gbps) links separately managed by three research networks in the U.S. and Europe. So what would happen if those massive datasets were instead transferred using a single 100 Gbps connection?
That was the thinking behind an experiment that began in early March as the Department of Energy’s ESnet, Internet2, CANARIE, GÉANT, NORDUnet and SURFnet — the leading research and education networks in the U.S., Canada, Europe and Scandinavia – collaborated with CERN to use a leased 100 Gbps connection between Amsterdam (Netherlight Open Exchange) and New York. The four-week test was conducted in collaboration with LHCONE, the LHC Open Network Environment. The results of the initial test were impressive. »Learn more

April 14 & 16: ESnet, NERSC Staff Invited to Say 'Cheese' for NASA Earth Day Mosaic

ESnet and NERSC staffs are invited to participate in group photos that will become part of NASA's GlobalSelfie day. NASA plans to collect and use photos posted to social media on that day to recreate the iconic Blue Marble image taken in 1972 by the crew of the Apollo 17 spacecraft.

ESnet: 1:00pm, Monday, April 14, Building 50 auditorium
NERSC: 1:00pm, Wednesday, April 16, OSF computer room

Greg Bell to Present ESnet Overview as Part of NIST’s IT Security Day

ESnet Director Greg Bell will give an invited presentation about ESnet on Tuesday, April 8, as part of NIST (National Institute of Standards and Technology IT Security Day. The daylong program is designed to heighten awareness of IT security issues and related topics among NIST staff, associates and invited guests. Bell was asked to describe what ESnet is, how it is being used to support government research and how it is secured. Last year's NIST IT Security Day events attracted about 3,000 attendees throughout the day.

This Week's CS Seminar

Multiscale modeling in continuum mechanics: A connection to the Irving-Kirkwood procedure
Wednesday, April 9,  3:30pm – 4:30pm, 939 Evans Hall, UCB Campus
Panayiotis Papadopoulos, University of California, Berkeley

This talk describes a process for extending the classical Irving-Kirkwood procedure used in statistical mechanics to extract local fluxes to the problem of continuum-mechanical multiscale modeling. An application of this extended method is explored within the context of finite element-based homogenization of solids. Expressions for stress and heat flux derived here are contrasted to those obtained using the standard Hill-Mandel approach.

Link of the Week: NASA to Recreate Blue Marble Photo Using Earth Day 'Selfies'

This Earth Day, April 22, NASA is using a "crowd-sourced collection of snapshots of the people of Earth" to recreate the iconic Blue Marble photo taken by the crew of the Apollo 17 spacecraft in 1972. Everyone is encouraged to participate. Just post a photo with the hashtag #GlobalSelfie to Twitter, Instagram, Facebook, Google+ or Flickr on April 22. Include your location in the image. For more information, visit the »Visit NASA Global Selfie page. »Read more.