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mathematical sciences, Computational Sciences & Mathematics

With multidisciplinary expertise spanning technical pillars of high-performance computing, data science, and computational mathematics, we work toward building computational capabilities that position PNNL as a computing powerhouse. We also focus on enhancing the Science of Computing to achieve high-performance, power-efficient, and reliable computing at extreme scales for a spectrum of scientific endeavors that address significant problems of national interest, especially among PNNL’s core pursuits—energy, the environment, national security, and fundamental science.

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Krishnamoorthy Named New ACM Senior Member

Congratulations to Sriram Krishnamoorthy, a research scientist and the System Software and Applications Team Leader in PNNL’s HPC group, who was named an Association for Computing Machinery Senior Member. This designation recognizes ACM members for their long-term exceptional performance that “sets them apart from their peers.” In another noteworthy turn, he also will present the keynote address at the upcoming 2016 X10 Workshop. According to ACMD Division Director Nathan Baker, “Sriram continues to exemplify the high-caliber research and talented personnel who make up ACMD Division’s High Performance Computing group.”



two DNA simulations

A New Model for Simulating DNA's 'Atmosphere' of Ions

In nature, DNA exists within a solution rife with electrostatically charged atoms or molecules called ions. A recent study led by Pacific Northwest National Laboratory researchers investigated a new model of how B-DNA, the form of DNA that predominates in cells, is influenced by the water-and-ions “atmosphere” around it.



Fission

A Slow Separation

In the first study of its kind, scientists collaborating from the University of Washington, Warsaw University of Technology, Los Alamos National Laboratory and PNNL developed a novel model seeking a more intricate look at what happens during the final stages of the nuclear fission process. Using the model, they determined that fission fragments remain connected far longer than expected before the daughter nuclei split apart, delivering a long-awaited description of real-time fission dynamics within a microscopic framework and opening a pathway to a theoretical method with abundant predictive power. Notably, in addition to its publication, the paper was highlighted as an Editors’ Suggestion by Physical Review Letters.



Four Score!

Working with an international team of academics, Sriram Krishnamoorthy, a research scientist and System Software and Applications Team Lead in ACMD Division’s High Performance Computing group, will join a select group of scientists whose work will be featured as part of the 37th Annual ACM SIGPLAN Conference on Programming Language Design and Implementation, known as PLDI. This marks the fourth time in a row Krishnamoorthy’s work, this time focused on avoiding cache conflict misses that lower computing system performance, will be featured in this leading programming language research forum.



A Spotlight on Improving Computing System Performance

Shuaiwen Leon Song, with ACMD Division’s High Performance Computing group, co-authored two accepted full papers to be featured during this year’s ACM 25th International Symposium on High-Performance Parallel and Distributed Computing, known as HPDC’16. One paper details using novel algorithm-based fault tolerance schemes to detect and correct soft errors that can lead to silent data corruption, while the other aims to improve computing performance using a first-of-its-kind scheme that introduces false sharing in multithreaded systems to reduce memory contention and optimize HPC applications. Both papers will be featured at HPDC’16 being held May 31-June 04, 2016 in Kyoto, Japan.



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