InTheLoop | 05.11.2015
Ushizima Receives DOE Early Career Award
Daniela Ushizima, of the Computational Research Division, has received a 2015 Early Career Research Program award from the Department of Energy’s Office of Science. The five-year, $2.5 million award will fund her research aimed at extracting hidden information from digital images used in materials experiments.
Former Computing Sciences Alvarez Fellow Anubhav Jain, now on staff in the Energy Technologies Area, was also one the three Berkeley Lab winners.
“This is a great opportunity to explore and delve into image-based experiments,” Ushizima said of her award. “We are in a unique position where we have collaborations with the data sources, multidisciplinary teams to interpret the data and the computational methods to automate some of the inferences in this area, allowing us to solve challenges very specific to Berkeley Lab and other DOE facilities.” »Read more.
Berkeley Researchers Honored for Contributions to Climate Data Analysis
Twelve Berkeley researchers are among the recipients of the 2015 Federal Laboratory Consortium for Technology Transfer’s (FLC) Interagency Partnership Award. The team was honored for contributing a number of parallel analysis and visualization tools to the UV-CDAT, a powerful toolset that aids climate researchers in solving their most complex data analysis and visualization challenges.
The Berkeley recipients include the Computational Research Division's Wes Bethel, Michael Wehner, Suren Byna, Hank Childs, Harinarayan Krishnan, Pardeep Pall, Oliver Ruebel, Gunther Weber and John Wu, NERSC's Prabhat, and Earth Sciences Division's William Collins. Christopher Paciorek of UC Berkeley also contributed to the project.
The FLC Interagency Partnership Award recognizes the efforts of federal science and technology employees from at least two different agencies who have collaboratively accomplished outstanding work in the process of transferring a technology. The Berkeley Lab researchers share this award with collaborators at the Department of Energy’s Lawrence Livermore, Los Alamos and Oak Ridge National Laboratories; NASA’s Goddard Space Flight Center and NOAA’s Earth Systems Research Laboratory. »Read more.
Energy Secretary Moniz Honors ESnet Staff for Developing OSCARS Bandwidth Reservation Service
Energy Secretary Ernest Moniz has recognized ESnet staff members with a DOE Secretarial Honor Award for their development of OSCARS, the On-demand Secure Circuits and Reservation System. OSCARS is a software service that creates dedicated bandwidth channels for scientists who need to move massive, time-critical data sets around the world.Secretary Moniz presented the 2015 DOE Secretarial Honor Awards during a special program held May 8 at DOE headquarters in Washington, D.C. ESnet staff who received the award are William E. Johnston, Evangelos Chaniotakis, Chin P. Guok, Andrew Lake, Inder Monga, Eric Pouyoul and Mary Thompson. »Read more.
Mathematician James Glimm to Give May 13 Talk on Numerical Models of Subgrid Physics
Noted mathematician James Glimm will discuss “Numerical Models of Subgrid Physics” in a Computing Sciences seminar at 10 a.m. Wednesday, May 13, in the Bldg. 50 auditorium. Glimm, a distinguished professor at Stony Brook University in New York, has made fundamental contributions to nonlinear analysis, quantum field theory and computational fluid dynamics. He also heads the Computational Science Center at Brookhaven National Laboratory.
Chombo-Crunch Sinks Its Teeth into Fluid Dynamics
Berkeley Lab scientists are breaking new ground in the modeling of complex flows in energy and oil and gas applications, thanks to a computational fluid dynamics and transport code dubbed “Chombo-Crunch.”
Chombo-Crunch—the brainchild of David Trebotich, a computational scientist in the Computational Research Division (CRD), and Carl Steefel, a computational geoscientist in the Earth Sciences Division (ESD)—is helping scientists to better understand the dynamics of geologic carbon sequestration, one possible alternative to releasing carbon dioxide, the primary culprit of global warming, into the atmosphere. It could also lead to new safety measures in the oil and gas industry and aerospace engineering. »Read more.
ESnet, Partners Seek Proposals for “Enlighten Your Research-Global” Program
ESnet and 11 other leading national research and education networks (NRENs) representing the Americas, Asia-Pacific and Europe have launched the second “Enlighten Your Research Global” (EYR-Global) program. This program, which helps accelerate international research collaborations by providing selected proposals with improved networking, data transfers, and/or engineering, is now accepting proposals.
The EYR-Global program reflects two growing trends in research: it is increasingly international in scope, and increasingly reliant on high-speed networks to provide critical resources for managing, sharing and analyzing the data driving that research. »Read more.
Global Breakthrough for Software-Defined Networking
The Open Networking Operating System (ONOS) Project, the Open Networking Foundation (ONF), Corsa Technology (Corsa), ESnet, AARNet and CSIRO today announced the successful deployment of an ONOS-based software-defined peering router. The router located at AARNet/CSIRO in Australia exchanges routes with the Vandervecken software-defined networking (SDN) controller stack at ESnet in California and uses high performance data planes comprised of Corsa switches in both locations.This deployment validates the benefits of open source SDN principles to flexibly deliver agile applications at a fraction of the cost of traditional proprietary networking solutions. Successfully deploying carrier-grade SDN applications with control and data planes capable of running at Internet-scale capacity in the WAN using disparate SDN systems represents an important milestone for the networking industry. »Read more.
This Week's CS Seminars
NERSC Brown Bag - NERSC's relationship with the Joint Genome Institute
Tuesday, May 12, 12:00pm-1:00pm, NERSC OSF 943-238
Kjiersten Fagnan, JGI-NERSC
Have you ever wondered what the JGI does? Or why they generate so many tickets? Or why they need so many large file systems? In this brown bag I'll give an overview of the JGI, the science they do and how NERSC supports them. I'll cover their data management system, JAMO, some of the workflows and pipelines they run to process data and talk a little bit about the joint projects we have to improve the JGI's scientific computing practices.
Numerical Models of Subgrid Physics
Wednesday, May 13, 10:00am-11:00am, Bldg. 50 Auditorium
James Glimm, Stony Brook University and Brookhaven National Laboratory
Turbulence remains a major scientific and numerical obstacle for many engineering problems of practical importance; currently planned advances in computer hardware will hardly ameliorate this problem, and so the issue has to be addressed at an intellectual level. Commonly used Reynolds averaged Navier-Stokes (RANS) models, the workhorse of turbulent simulation, are data hungry due to their numerous underspecified parameters, and are hardly predictive unless supported by sufficient data. Data is generally expensive and otherwise not available, so that the more accurate Large Eddy Simulations (LES) are employed to fill this gap.LES are not trouble free. In this talk we will outline some of their major weaknesses, and mitigating strategies. Unreliable results with LES can usually be traced to a failure to employ LES correctly.
In a word, the major problem with LES is the non-uniqueness of their solutions. Of course, this should be a major concern when the goal is predictive science. LES has fewer parameters than RANS and a simpler formulation. Even with this fact, the key weakness of LES lies in its parameters, both their identification and their realization in a numerical algorithm.
In this talk, we first identify at an intuitive level the origins of LES nonuniqueness. We find that the missing ingredient is the subgrid physics of fluid transport embedded in the numerical algorithm. In part the subgrid fluid transport is addressed by the addition of "models" to the fluid equations, and with a recipe for the choice of dynamic (space-time dependent) model coefficients.
For reasons of numerical stability, (turbulent) diffusion can be added to the equations in this manner, but it cannot be subtracted. Thus we also propose a Front Tracking algorithm to control excesses of numerical diffusion. The use of this algorithm is called for in Eulerian algorithms applied to problems with a Schmidt or Prandtl number in excess of 0.3.
Finally, we address issues of technology transfer, with an API (called FTI) for front tracking, to allow its ready adaption into other physics packages. The interface and operations on it are supported with high order accuracy. Future versions of this API will support fully conservative tracking.
CITRIS: Who Owns the Data? An International Conference on Digital Assets, Data Philanthropy, and Public Benefit
Thursday, May 14, 9:00 am - 5:30pm, Bantao Auditorium, Sutardja Dai Hall, UC Berkeley
Keynote Speaker: Brewster Kahle, The Internet Archive
As countless social, commercial and civic transactions are rapidly moving to online platforms, and sensors in our houses, cars, and mobile devices send endless streams of data to servers around the world, discussions of “Big Data” have become commonplace. But what happens to the information once it leaves our fingertips or pockets? How is the data being used, who benefits, and what role do individual contributors of data play–wittingly or unwittingly–in the revenue models that sustain the systems?
Building on successful conferences hosted at CITRIS, such as “Can Open Data Improve Democratic Governance?” (September 2013) and “Pan-Optics: Emerging Perspectives on Visual Privacy and Surveillance” (March 2014), we will convene a one-day public conference regarding data ownership and privacy, in spring 2015. “Who Owns the Data?” will bring together data scientists, elected officials, representatives of public agencies and advocacy organizations, and entrepreneurs from the United States and Europe.
Registration is $20 for the general public and $10 for UC faculty and staff. »Learn more.