[hpc-announce] Supercomputing Spotlights: by Kengo Nakajima, May 21, 2025

[Erin Carson]

Road to "AI for Science": Exploring Software Sustainability through 
"Couplers"
Presenter: Kengo Nakajima, Information Technology Center, The University 
of Tokyo, Japan, and RIKEN Center for Computational Science (R-CCS), 
Japan
Wednesday, May 21, 2025, 2:00-2:40 pm UTC (30 min talk + 10 min 
questions)
7 am PDT / 9 am CDT / 10 am EDT / 2 pm UTC / 4 pm CEST / 11 pm JST
Participation is free, but registration is required
Registration link:  
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Supercomputing Spotlights is a webinar series featuring short 
presentations that highlight the impact and successes of 
high-performance computing (HPC) throughout our world. Presentations, 
emphasizing achievements and opportunities in HPC, are intended for the 
broad international community, especially students and newcomers to the 
field. Supercomputing Spotlights is an outreach initiative of 
SIAG/Supercomputing (https://urldefense.us/v3/__https://siag-sc.org__;!!G_uCfscf7eWS!aqRg2I7tvD6UsGjyZGaHJY8Ykp25i2VeotLLyG0mUALv0yEhjY6z39DaaOA_WVwgTGpFuD3pkFUTCovPDYCTkOTZOZKaonI$ ) …  Join us!

Abstract: "Coupler" is originally a tool for coupling multiple 
simulation models such as atmosphere and ocean, structure and fluid. In 
recent years, computer systems and workloads have become more diverse, 
and the role of couplers in supercomputing has become more important. In 
this talk, we focus on the "history" of couplers and consider what 
software sustainability means. We briefly describe three projects, In 
the 1st project (ppOpen-HPC: 2011-2018), we developed an MPI-based 
scalable coupler for multi-physics simulations. In the 2nd project 
(h3-Open-BDEC: 2019-2024), we extended the idea of multi-physics coupler 
for integration of Simulation/Data/Learning (S+D+L) on heterogeneous 
supercomputer system Wisteria/BDEC-01 by the University of Tokyo, which 
consists of computing nodes for computational science and engineering 
with A64FX (Odyssey), and those for Data Analytics/AI with NVIDIA A100 
GPU's (Aquarius). The third project (JHPC-quantum: 2023-2028) has 
started in November 2023, further expanding h3-Open-BDEC to realize 
Quantum-HPC hybrid computing. In this talk, we will introduce how 
couplers have evolved and what role they have been playing in 
supercomputing.

Bio: Kengo Nakajima has been a professor in the Supercomputing Research 
Division of the Information Technology Center at the University of Tokyo 
since 2008. Prior to joining the University of Tokyo in 2004, he spent 
19 years in industry. He has also been a deputy director of RIKEN Center 
for Computational Science (R-CCS) since 2018. His research interests 
cover computational mechanics, parallel numerical algorithms, and high 
performance computing (HPC). Kengo holds a B.Eng in aeronautics 
(University of Tokyo, 1985), an MS in aerospace engineering (University 
of Texas at Austin, 1993), and a PhD in engineering mechanics 
(University of Tokyo, 2003).


Best regards,
The SIAG/SC officers for 2024-2025
Ulrike Meier Yang (chair)
Rio Yokota (vice chair)
Hartwig Anzt (program director)
Erin Carson (secretary)