The Weekly Electronic Newsletter for Berkeley Lab Computing Sciences Employees
December 5, 2005
CRD's Yu-Heng Tseng Honored by Taiwan as Outstanding Overseas Young Scientist
Yu-Heng Tseng, a computational scientist in CRD's Scientific Computing Group, was recently honored as an "Outstanding Overseas Young Scientist" by the Foundation for the Advancement of Outstanding Scholarship in Taiwan. The award is for young scientists working overseas. Yu-Heng is a native of Taiwan and did his undergraduate work at National Taiwan University. He received his Ph.D. from Stanford in 2003, then spent a year at Johns Hopkins University before joining LBNL.
At Berkeley Lab, Yu-Heng is working on a global climate research project funded under DOE's Scientific Discovery through Advanced Computing (SciDAC) program. In particular, he is working with the Community Climate System Model (CCSM). Last spring, he also was appointed as a lecturer in the Department of Civil and Environmental Engineering at UC Berkeley and taught CEE 100, "Elementary Fluid Mechanics.
At Stanford, he developed an accurate and efficient immersed boundary method to deal with arbitrarily complex geometry, which he applied to turbulent flow simulation, atmospheric boundary layer and ocean modeling. The method specifies a body force in such a way as to simulate the presence of complex geometry without altering the computational grid. The advantage of this method is its simplicity and accuracy in representing complex geometry in the real world. Recently, he applied the method to model the air pollutant transport in urban environments and the fish swimming in the river.
In his paper entitled Regional circulation of the Monterey Bay region: The effects of Monterey Canyon, he described how the method was used to simulate the effects of ocean circulation in and around Monterey Bay. Satellite images often show a cyclonic eddy in the bay and an anti-cyclonic eddy outside the bay during spring and summer, he wrote in his abstract. We compare the simulation results with observed mooring data and compare the simulated upwelling with the satellite images. The mean currents follow the annual cycle of the seasonal circulation. The coastal geometry plays an important role in the generation and movement of coastal eddies. We also study the effects of Monterey Submarine Canyon on the large scale coastal circulation. Quantitative comparisons between hydrostatic and non-hydrostatic models are made to investigate the importance of the non-hydrostatic effects in coastal ocean simulation. We also find that the deep Canyon contributes significantly to non-hydrostatic effects that cannot be ignored in coastal ocean modeling with complex topography.
CRD's Arie Shoshani, Chris Ding Speak at Data Mining Conference
Arie Shoshani, head of the Scientific Data Management Research and Development Group in the Computational Research Division, was a keynote speaker at the Fifth IEEE International Conference on Data Mining held last week in Houston. Arie spoke on Efficient Indexing Technology for Data Mining of Scientific Data.
Here's the abstract for his talk:
Data mining in scientific applications usually involves searches over a large number of objects in the multidimensional space of their properties, or searches for known patterns. This is in contrast to mining for associations between objects, or discovering new patterns. Examples are searching over billions of objects to find rare objects by expressing numerical range conditions on their properties, or finding flame fronts in large volume spatio-temporal combustion simulation data by expressing multiple conditions over the data values associated with the cells in the 3D space. A critical issue in supporting such directed searches over large data volumes is the efficiency of the indexing method. This is required in order to facilitate real time exploration of the data. In this talk, we will describe a specialized bitmap indexing method, called FastBit, which has proved especially appropriate for numeric multidimensional data common in scientific applications. We will illustrate the use of this technology with several examples.
Also, Chris Ding of the Scientific Computing Group and Hanchan Peng of the Lab's Life Sciences Division presented a half-day tutorial on bioinformatics and bioimage analysis.
Reminder: ERIP Referral Program Rewards Employees for Finding New Hires
Computing Sciences is currently looking for candidates to fill 11 open job postings in three divisions, and employees are reminded that the Lab's Employee Referral Incentive Program (ERIP) is still in effect. ERIP pays $1,000 (net) to employees who refer successful candidates. Award payments are made within one month after the successful referral reports to work. Full-time and part-time employees are eligible to participate.
For ERIP details, including information on how to submit candidates, go to http://www.lbl.gov/Workplace/HumanResources/ERIP/index_erip.html.
A list of current job openings in Computing Sciences is at http://www.lbl.gov/CS/Careers/OpenPositions/.
NERSC's Computational Systems Group Has Opening for Systems Engineer
The Computational Systems Group has a posting for a computer systems engineer. As a member of a NERSC high performance computing system administration team reporting to the Computational Systems Group lead, the successful candidate will configure, administer and evaluate hardware and software, as well as oversee the installation, testing and operation of large-scale computational systems, including job scheduling, system-wide functionality and tuning in a 24 x 7 production environment. The work will be performed at the Oakland Scientific Facility .This position is a CSE level II or III. For more information, go to http://jobs.lbl.gov/LBNLCareers/details.asp?jid=18522&p=1.
Telephone Service Center Has Job Posting for Systems Engineer
The IT Divison's Telephone Service Center (TSC) has an opening for a computer systems engineer with experience working with T1 circuits, ISDN, OPX circuits, PBX and voicemail systems. The position reports to the TSC group leader. Duties include processing service requests for voice communications in an Oracle-based, multi-module telemanagement database and performing voicemaill system administration functions for the Laboratory. This includes creation and maintenance of user accounts and performance and monitoring of system upgrades, repairs and backups. For details, see http://www.lbl.gov/CS/Careers/OpenPositions/IC18579.html.
About Computing Sciences at Berkeley Lab
The Lawrence Berkeley National Laboratory (Berkeley Lab) Computing Sciences organization provides the computing and networking resources and expertise critical to advancing the Department of Energy's research missions: developing new energy sources, improving energy efficiency, developing new materials and increasing our understanding of ourselves, our world and our universe.
ESnet, the Energy Sciences Network, provides the high-bandwidth, reliable connections that link scientists at 40 DOE research sites to each other and to experimental facilities and supercomputing centers around the country. The National Energy Research Scientific Computing Center (NERSC) powers the discoveries of 7,000-plus scientists at national laboratories and universities, including those at Berkeley Lab's Computational Research Division (CRD). CRD conducts research and development in mathematical modeling and simulation, algorithm design, data storage, management and analysis, computer system architecture and high-performance software implementation. NERSC and ESnet are Department of Energy Office of Science User Facilities.
Lawrence Berkeley National Laboratory addresses the world's most urgent scientific challenges by advancing sustainable energy, protecting human health, creating new materials, and revealing the origin and fate of the universe. Founded in 1931, Berkeley Lab's scientific expertise has been recognized with 13 Nobel prizes. The University of California manages Berkeley Lab for the DOE’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 science.energy.gov.