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New Employee Profiles - October 2015

October 1, 2015

Jialin Liu

Jialin Liu, NERSC

As a high performance data analytics engineer in NERSC’s Analytics Group, Jialin Liu will help diagnose and solve NERSC User’s input/output (I/O) problems, as well as prototype and develop practical data management strategy for future high performance computing architectures, like Cori.

Originally from China, Liu earned a Bachelors degree in Computer Science from Jinan University in Guangdong, China. Shortly after, he migrated to the United States to pursue a Ph.D. in parallel computing from Texas Tech University in Lubbock, Texas.

Although Liu might be new to NERSC, he is no stranger to Berkeley Lab or to the task of working with large scientific datasets. In the summer of 2013, Liu was an intern in the Computational Research Division’s Scientific Data Management Group. Here, he worked with Berkeley Lab researchers to develop a system—called the Scientific Data Services (SDS) framework—to improve the read performance of raw experimental data to a parallel file system, where it would be analyzed. As part of his doctoral research on scientific data management and parallel I/O, Liu also collaborated with the HDF group on enabling in-memory computing in scientific I/O library.

“I became interested in computing in high school, when I read a book about how to build software using visual basic programming,” says Liu.

In his spare time, Liu enjoys spending time outdoors gardening and hiking.

Changho Kim

Changho Kim, CRD

As a new postdoctoral researcher in CRD’s Center for Computational Sciences and Engineering (CCSE), Changho Kim will be developing numerical methods for fluctuating hydrodynamics combined with chemical reactions. Unlike the Navier-Stokes equations that describe fluid dynamics at the macroscopic scale, fluctuating hydrodynamics also incorporates noise, which describes fluctuations in a fluid system at mesoscopic scale.

A native of South Korea, Kim notes that his interest in computing sparked as an undergraduate at the Korea Advanced Institute of Science and Technology (KAIST) when he saw the results generated by his first molecular dynamics code.

“I have always wanted to see how math equations or physical laws would behave by my eyes. One of the most spectacular moments was that I could see the movement of the Lennard-Jones fluid particles on a computer screen, which was generated from my first molecular dynamics code,” says Kim. “Ever since then, I have been interested in molecular dynamic systems and investigated how the randomness in the dynamics originates and how it can be described effectively.”

After earning at PhD in chemistry from KAIST, Kim moved to Rhode Island to pursue another PhD in applied math from Brown University. In his spare time, Kim enjoys taking very long walks. In addition to exploring Bay Area tracking courses, Kim would like to someday walk the Camino de Santiago.

About Computing Sciences at Berkeley Lab

High performance computing plays a critical role in scientific discovery. Researchers increasingly rely on advances in computer science, mathematics, computational science, data science, and large-scale computing and networking to increase our understanding of ourselves, our planet, and our universe. Berkeley Lab’s Computing Sciences Area researches, develops, and deploys new foundations, tools, and technologies to meet these needs and to advance research across a broad range of scientific disciplines.

Founded in 1931 on the belief that the biggest scientific challenges are best addressed by teams, Lawrence Berkeley National Laboratory and its scientists have been recognized with 13 Nobel Prizes. Today, Berkeley Lab researchers develop sustainable energy and environmental solutions, create useful new materials, advance the frontiers of computing, and probe the mysteries of life, matter, and the universe. Scientists from around the world rely on the Lab’s facilities for their own discovery science. Berkeley Lab is a multiprogram national laboratory, managed by the University of California for the U.S. Department of Energy’s Office of Science.

DOE’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit energy.gov/science.