News

CSMD's Nageswara Rao Wins R&D 100 Award (July 2014)
Diagnosis Using the Chaos of Computing Systems, or DUCCS, was developed at ORNL by Nageswara Rao.

DUCCS ultra-lightweight software quickly and nonintrusively detects a variety of hardware faults in processing units, accelerators, memory elements and interconnects of large-scale high-performance computing systems such as supercomputers, clusters and server farms. The software combines chaotic map theory with advanced CPUs and CPU systems to detect component faults in systems that handle large computational problems such as scientific computations, weather predictions and web data processing. DUCCS software provides critical diagnosis information that contributes to the resilience of computing systems in terms of error-free computations and sustained capacity.

The research was funded by the DOE's Mathematics of Complex, Distributed, Interconnected Systems Project, Applied Mathematics Program, Office of Advanced Scientific Computing Research.

 

ORNL Joined the Eclipse Foundation (June 2014)
Jay Jay Billings

ORNL joined the Eclipse Foundation, which manages both an open source community and the development of the popular Eclipse Integrated Development Environment. The effort to join the Foundation was led by Jay Jay Billings of the Computer Science Research group to address several pressing issues for the NEAMS Integrated Computational Environment (NiCE).

Membership in the Foundation includes many benefits and applies site-wide to all UT-Battelle employees and subcontractors (including ORAU/ORISE post-graduates). In addition to providing access to a user base of more than nine million users for Eclipse projects, the Eclipse Foundation also provides marketing and advertising support, intellectual property-friendly contributor agreements to help with contributions to projects from third-party developers and access to hundreds of skilled developers from some of the biggest (and smallest!) companies in the tech sector. The process of proposing new projects is also streamlined for members since the necessary agreements are already in place.

Membership also allows ORNL to participate in the new Eclipse Science Working Group (SWG). The SWG is focused on creating new, science-focused Eclipse projects with completely new code bases or contributions from Foundation members in a technology-agnostic setting (read "not only Java projects"). The SWG also acts as a support community related to scientific activities projects with Eclipse.

Jay pursued membership in the Foundation primarily because of growing contributions from external collaborators to NiCE. Each contributing organization has its own set of policies related to open source software, intellectual property rights and code contributions, so the easiest and safest route was to creating a new project with a third party software Foundation. Since NiCE is based on the Eclipse Rich Client Platform and the NiCE team has been involved with the community for a number of years, the Eclipse Foundation was the obvious choice. A proposal to create the Eclipse Integrated Computational Environment, with NiCE as the initial contribution, is currently under review.

Sreekanth Pannala Delivers ORNL Symposium Talk "High performance computing for accelerating sustainable transportation innovations" (May 2014)

Making significant gains in vehicle efficiencies involves understanding extremely complex interactions among the engine, battery, power electronics, materials, aerodynamics, and controls. Computational science is a growing field with the capacity to handle the exponential increase in the vehicle calibration space and simulate real-world scenarios. In his talk, Dr. Sreekanth Pannala detailed the computational efforts related to transportation and lay down a roadmap for using high performance computing to accelerate the design of highly efficient and cost-effective vehicles that meet regulatory, safety, and consumer demands.

Read the full abstract [here]. View the presentation [here].

Kate Evans' Work Recognized by Alma Mater (May 2014)

The work of CSMD researcher and Group Leader Kate Evans is currently being highlighted in an article in Haverford College's quarterly online magazine. The article "Investigating a Changing Climate" outlines work being carried out by Haverford graduates. In particular, the article touches on the work Kate has done with the Community Climate System Model which has been modeling global climate with increasing complexity and fidelity since 1983. Running on ORNL's Titan supercomputer, this model is able to calculate temperature, wind, rain, humidity, and other variables on a virtual grid covering the globe. These models can reproduce the past and predict how the climate will change in the coming decades and centuries.

Please go to http://www.mydigitalpublication.com/publication/?i=200366 to read the entire article.

This visualization of water vapor from a climate simulation was developed by the research group of Kate Evans using the Community Climate System Model, version 3. Monitoring water vapor enables climate scientists to improve their understanding of regional water cycles within a global context.-- Image created by Jamison Daniel

 

 

 

 

 

 

 

 

Patent Issued for "Coordinated Garbage Collection for RAID Array of Solid State Disks" (May 2014)

A team of researchers at ORNL invent a novel architecture for high performance non-volatile storage systems.

Non-volatile solid-state storage technologies such as Flash storage are increasingly used to accelerate I/O intensive workloads across a broad spectrum of domains from scientific computing to cloud computing and traditional enterprise IT. These storage technologies hold the promise of significantly improving the performance of a variety of workloads be they hadoop workloads, massive scale simulation outputs, to enterprise database workloads. While these technologies hold significant promise to accelerate these workloads, many solid-state storage technologies can suffer from significant performance degradation due to internal management tasks within the solid-state device. These internal management tasks, most notably garbage collection tasks used to reclaim free storage space after, can reduce performance by as much as 70 percent. While these internal management tasks occur infrequently on any one device, as organizations deploy multiple solid-state storage devices in common storage configurations such as RAID, the probability of performance degradation increases dramatically. To alleviate this, the ORNL team developed a novel architecture to coordinate these internal storage management tasks across a large pool of storage devices. This architecture significantly reduces the probability of productive I/O operations becoming degraded by these internal management tasks. For further information please refer to the full patent (patent number 8,713,268 B2) and the paper: David A. Dillow, Galen M. Shipman, Feiyi Wang, Sarp Oral, Junghee Lee, Youngjae Kim, "Coordinating Garbage Collectionfor Arrays of Solid-State Drives," IEEE Transactions on Computers, vol. 63, no. 4, pp. 888-901, April 2014, doi:10.1109/TC.2012.256

CSMD's Nagiza Samatova Wins Award (April 2014)

CSMD researcher Nagiza Samatova has been awarded the IEEE Computer Society's award Distinguished Contributions to Public Service in a Pre-College Environment for her outstanding teaching and mentoring of pre-college students in research projects.

Please see the complete award [here].

 

 

 

 

Postdoctoral Researcher Tianyu Jiang Awarded in "Best Dissertation" Competition

Tianyu Jiang, a postdoctoral researcher at Oak Ridge National Laboratory's Climate Change Science Institute, achieved 3rd place in the Chinese-American Oceanic and Atmospheric Association's "best dissertation" competition. Jiang, a member of CCSI's Earth System Modeling Group, received the award February 5 in Atlanta during the 94th annual meeting of the American Meteorological Society.

Jiang said what gave him the upper hand in the competition was a summer spent as a part of ORNL's Higher Education Research Experiences program, under the supervision of Kate Evans, leader of the ORNL Computational Earth Sciences Group and a member of CCSI. "My experience here was world class," said Jiang. "I had the chance to use high-performance computers and collaborate with the entire team to do cutting-edge work."

Jiang's thesis, "Understanding the Scale Interaction of Atmospheric Transient Disturbances and Its Coupling with the Hydrological Cycle over the Pacific-North American Regions," focused on the connection between climate over the North Pacific and extreme weather - freezing temperatures, high-impact precipitation, droughts, and other severe events. "Understanding extreme weather under a changing climate is becoming more and more challenging and urgent, not only because of the public's immediate need for weather information, but also the increasing concern from policymakers," said Jiang.
- by Justin Kaffka

Paul Kent was elected as a member at large in the American Physical Society, Division of Computational Physics (DCOMP).

Forrest Hoffman's paper "Causes and Implications of Persistent Atmospheric Carbon Dioxide Biases in Earth System Models" was recognized as the most downloaded paper from the Journal of Geophysical Research: Biogeosciences for the month of February. The complete author's list and information can be found [here].

Clayton Webster was elected Frontier of Science Fellow for the National Academy of Sciences.

A committee of National Academy members selects the Fellows from among the best young scientists in a broad range of science disciplines. Clayton was selected for his work in uncertainty quantification and he presented an overview of the field at the Kavli Frontiers of Science symposium, jointly organized by the Humboldt Foundation and the US National Academy of Sciences, April 4-7, 2014.

Kate Evans Appointed Group Leader

The Computer Science and Mathematics Division (CSMD) is pleased to announce the appointment of Dr. Kate Evans as the Group Leader for the Computational Earth Sciences Group within CSMD, effective January 1, 2014. Kate has been the interim group leader since February 2013, succeeding Danny McKenna, who has moved to the Graduate Education and University Partnership Division. Kate received her Ph.D. from Georgia Institute of Technology in Atmospheric Science and her B.S. from Haverford College in Physics. Kate will be responsible for leading and continuing to develop a top notch research capability in computational Earth science.

 

 

 

 

Bobby Sumpter New Deputy Director

Bobby G. Sumpter has accepted the position as Deputy Director of the Center for Nanophase Materials Sciences (CNMS).

Bobby received his Ph.D. in Physical Chemistry from Oklahoma State University in 1986. Following postdoctoral studies in Chemical Physics at Cornell University and in Polymer Chemistry at the University of Tennessee, Bobby joined the Chemistry Division at Oak Ridge National Laboratory as a staff member in the Polymer Science group. Bobby's research is focused on the fundamental understanding of self-assembly processes, interactions at interfaces, the structure and dynamics of molecular-based materials, and the physical, mechanical and electronic properties of nanoscale materials. His research uses a broad spectrum of materials theory and large-scale simulation approaches, including electronic structure and molecular dynamics. Working at the confluence of theory and experiment, he has authored over 300 scientific publications and several patents. He was named Corporate Fellow in 2013.

Bobby has been a staff member of the Center for Nanophase Materials Sciences since 2007 and the group leader for the Nanomaterials Theory Institute (NTI) at the CNMS since 2009. He is also the group leader of the Computational Chemical and Materials Sciences (CCMS) group in the Computer Science and Mathematics Division. Bobby will continue to serve as acting group leader for both the NTI and CCMS.

Clayton Webster Appointed Group Leader

The Computer Science and Mathematics Division (CSMD) is pleased to announce the appointment of Dr. Clayton Webster as the Group Leader for the Computational and Applied Mathematics Group within CSMD. Clayton received his Ph.D. from Florida State University in Applied and Computational Mathematics and his M.S. from McMaster University in Applied Mathematics. Clayton will be responsible for leading and continuing the development of research capability in mathematics.

Intern Roisin Langan wins best abstract award at student poster session

Roisin Langan, an intern at Oak Ridge National Laboratory (ORNL), spent last summer improving the ability of climate models to predict the variability and extremes of precipitation. With guidance from her mentors, Richard Archibald and Kate Evans of ORNL's Climate Change Science Institute, Langan analyzed data generated on the Oak Ridge Leadership Computing Facility's Titan supercomputer. Her project, titled "Stochastic Representation of Unresolved Processes in Climate Models," garnered attention labwide, winning the best abstract award at ORNL's Research Alliance in Math and Science (RAMS) banquet, a student poster session held August 8. Research in this field could result in more accurate warning systems for extreme events, such as flooding, droughts, and heat waves, and help stakeholders plan economic and humanitarian relief efforts. "This experience helped me gain invaluable networking channels, experience, and instruction in effective scientific communication," said Langan, a recent graduate of the University of California, Santa Barbara. Now an intern through ORNL's Nuclear Engineering Science Laboratory Synthesis program, she hopes to enter a graduate program in computational science in fall 2014. - Jennifer Brouner
Caption: Gil Weigand, director of Strategic Programs in the Computing and Computational Sciences Directorate, presents Roisin Langan with the best abstract award at the RAMS banquet.
Photo credit: Jason Richards, ORNL.

Keeneland Improves Analysis and Understanding

July 29, 2013

The Keeneland Project (a five-year Track 2D cooperative agreement awarded by the National Science Foundation (NSF) in 2009 for the deployment of an innovative high performance computing system in order to bring emerging architectures to the open science community.) has been credited with helping researchers analyze cancer tumors. Read the article HERE.

Modeling and Simulation Made NiCE

May 4, 2013

The NEAMS Integrated Computational Environment - NiCE for short - is the NEAMS program's answer to the need for easy usability, accessibility, and collaboration. It complements both SHARP and MOOSE from the reactors and fuels product lines with common tools for creating input files, launching jobs locally and remotely, looking at data in 3D, and managing "assets," such as simulation input and output files. [more]

CLIMATE - Going small with big computers . . .

April 2013

ORNL's supercomputers are allowing climate scientists to zoom in on smaller and smaller areas to try to determine whether local and regional droughts influence climate extremes on a larger scale. What is the probability of a drought developing in the Southwest this decade? Ultra-high-resolution climate models may improve our ability to provide informed projections. In the highest-resolution model, grid cells are a mere one-quarter of a degree (23 miles) wide. "Data at this scale is only accessible with leadership computing resources," says ORNL mathematician Rick Archibald, one of nine ORNL researchers collaborating with scientists at Lawrence Berkeley, Lawrence Livermore and Los Alamos national laboratories on the Ultra-high-resolution Global Climate Simulation project.

A New Era in Automotive Engine Development Driven by HPC

CSMD researcher Sreekanth Pannala was interviewed about high performance computing's role in the development of new engines. [more]

CSMD Researchers Awarded Patent

CSMD researchers Bo Liu and Yehuda Braiman (along with ORNL researcher Yun Liu) have been awared a patent for their invention: V-shaped Resonators for addition of broad-area laser diode arrays. This invention is drawn to systems and methods for coherent addition of broad-area laser diode array.

Full patent document [HERE]

CSMD Researcher Moetasim Ashfaq published in Nature Climate.

CSMD researcher Moetasim Ashfaq's paper "Response of snow-dependent hydrologic extremes to continued global warming" has been published by Nature magazine's online presense Nature Climate Change. [more]

High Performance Computing Key Enabler for Accelerating Development of High Efficiency Engines

The complexity of new and future vehicles - driven by the need for increasing fuel efficiency and decreasing emissions with ever-changing drive-cycle demands and environmental conditions - is adding unprecedented flexibility in design and driving the need for better simulation and more powerful computers, observed Dr. Robert M. Wagner, Director of the Fuels Engines and Emissions Research Center, and Dr. Sreekanth Pannala, Senior Research Staff Member in the Computing and Computational Sciences Directorate at Oak Ridge National Laboratory in a keynote talk at the recent Global Powertrain Conference. [more]

2012 Director's Science Delivery Award

CSMD Researcher Forrest Hoffman (along with ORNL researchers Jitendra Kumar and Richard Mills), is on the team that received the United States Department of Agriculture's 2012 Director's Science Delivery Award for their work on the USDA's project ForWarn.

ForWarn is a satellite-based forest disturbance monitoring system for the conterminous United States. It delivers new forest change products every eight days and provides tools for attributing abnormalities to insects, disease, wildfire, storms, human development or unusual weather. Archived data provide disturbance tracking across all lands since 2000. http://forwarn.forestthreats.org/

Neutron Science and Supercomputing Come Together at Oak Ridge National Lab (HPCWire)

Novel capability will deliver the best of high-performance computing and cloud computing at national facility

Next-generation neutron scattering requires next-generation data analysis infrastructure. And that means not just more data, accelerated reduction, and translation and analysis, but linking the neutron scattering on a beam line live to a simulation platform where modeling and simulation can guide the experiment. [more]

David Bernholdt named Group Leader

David Bernholdt was named Group Leader of the Computer Science Research Group (CSR) on November 1. CSR represents the merger of the Application Performance Tools group, previously led by Rich Graham and CSR previously led by Al Geist. Al, who led the CSR group for 20 years, will be spending more time in his role as Chief Technology Officer for NCCS and in other leadership roles within CSMD. The mission of the CSR group helps researchers create and run scientific and technical applications on the largest scales of HPC systems. The group focuses on extreme-scale systems; system software; program- ming environments, including compilers and other program translation approaches, runtimes and communications, debug- gers, performance, and other tools; and scientific software. In 1993 he received his Ph.D. in Chemistry from the University of Florida, and then spent 2 years as a postdoc at PNNL as part of the original development team for the NWChem parallel com- putational chemistry package. From 1995-2000, he was an Alex G. Nason Fellow & a Sr. Research Scientist at Syracuse Universi- ty, and carried out research in both computational chemistry and computer science. Then he joined ORNL where his research program has focused on programming environments for HPC.

Lebrun-Grandie Wins Second Place

CSMD researcher Rahul Sampath's mentee, Damien Lebrun-Grandie, won second place in the 2012 Oak Ridge National Laboratory Nuclear Engineering Science Laboratory Synthesis (NESLS) Poster session. Twenty-eight of the NESLS students presented their work at the 2012 Summer Student Poster Session, which were judged for their excellence in technical achievement and presentation. The participants represent many areas of research throughout the laboratory, including research reactors, safeguards and nonproliferation, material sciences, nonreactor nuclear facilities, reactor and nuclear systems, radioisotope production, and CASL.

Communications of the ACM Research Highlight

CSMD researcher Rahul Sampath is a co-author on the paper A Massively Parallel Adaptive Fast Multipole Method on Heterogeneous Architectures. This paper was invited to be a Research Highlight for the publication Communications of the ACM. The paper describes a parallel fast multipole method (FMM) for highly nonuniform distributions of particles. We employ both distributed memory parallelism (via MPI) and shared memory parallelism (via OpenMP and GPU acceleration) to rapidly evaluate two-body nonoscillatory potentials in three dimensions on heterogeneous high performance computing architectures. Click HERE to read the full article.

A Spontaneous Collaboration

Thomas R. O'Donnell - DEIXIX Magazine
With the help of Oak Ridge computations, scientists are probing the properties of macroscale sponges made of nanoscale carbon-boron tubes. The material could soak up oil spills, help store energy or meet other needs.
In 2007, when Oak Ridge National Laboratory (ORNL) researchers calculated that adding boron would bend carbon nanotubes, they did little with the information.

Boron was one of several elements the computational scientists plugged into their model as they investigated ways to induce useful changes in nanotube structures. There were experiments to compare with the results of most of their calculations. There weren't any to check against the boron-doped nanotube simulations.

"We didn't think anything about boron, really," says Bobby Sumpter, Chemical and Materials Sciences Group leader and director of ORNL's Nanomaterials Theory Institute. "We thought it was interesting how it preferred negative curvature, and we kind of just left it at that."

Then Humberto Terrones, an ORNL-affiliated researcher from Belgium's Université Catholique de Louvain, came to visit last year. He and his brother, Mauricio, of Pennsylvania State University and Japan's Shinshu University, were investigating new nanotube materials.

Humberto Terrones "was talking about how they'd observed these three-dimensional-looking structures when they doped boron in," Sumpter recalls. "I said, 'But, Humberto, remember our results? Where we found these interesting effects and we think we understand exactly what happens?' I hadn't realized they'd done experiments for boron and just learned about it over a casual discussion - which actually turn out to be usually the most productive scientific discussions - just a cup of coffee with a white board."

Sumpter and Vincent Meunier of Rensselaer Polytechnic Institute recalculated the boron results and published them jointly with Rice University doctoral student Daniel Hashim's discovery of three-dimensional, macro-scale nanosponges. "It's always good to have experimental evidence that backs up theory or vice versa," Hashim says. "In this case we made the theory and the experimental evidence together and it gave this paper a lot more impact."
Click HERE for more information.

Student Wins ACM Student Research Competition

Auburn University student Yuan Tian won first place in the graduate category at the Association for Computing Machinery's (ACM) student research competition for her paper "Smart-IO: System-Aware Two-Level Data Organization for Efficient Scientific Analytics." Yuan is currently working in CSM's Scientific Data Group which is led by Dr. Scott Klasky. Dr. Klasky was pleased to point out that Yuan "has been integral for our continued success with ADIOS, and I believe she will be an incredible success in the future, as a postdoctoral scholar in the NSF RDAV project."