Richard Gerber User Services Group
	Office: National Energy Research Scientific Computing Center Lawrence Berkeley National Laboratory Oakland Scientific Facility Room 248 415 20th Street, Oakland, CA 510 486-6820 Email: ragerber@lbl.gov	Mailing Address: Lawrence Berkeley Laboratory MS 943R0256 One Cyclotron Road Berkeley, CA 94720

Richard Gerber is a High Performance Scientific Computing consultant and member of NERSC's User Services Group. He assists scientists run, debug, and optimize their codes. He is the lead for providing user support for NERSC's IBM POWER 5 system, Bassi, and President of ScicomP, the IBM HPC Systems Scientific User Group. Richard is also responsible for the design, implementation, and technical content of NERSC's Web site, web-based help system, and problem tracking database and web interface. He is also active in NERSC's enhanced scientific computing support for SciDAC and INCITE projects.

Richard has a Ph.D. in physics (computational astrophysics) from the University of Illinois at Urbana-Champaign. Prior to joining NERSC in 1996, Richard held a National Research Council postdoctoral fellowship in the Space Sciences Division at NASA Ames Research Center.

Duties and Interests

• Consultant, NERSC User Services Group
• Lead, Development and Maintenance of the NERSC web site.
• USG Lead, IBM POWER5 Bassi system
• President, ScicomP
• Web-based information technology and design.
• NERSC online help desk
• Concurrent Version System at NERSC
• HPC user software environment.
• HPC workload performance measuring, collection, and analysis.
• HPC scientific computing benchmarks.
• NERSC OSF Brown-Bag Lunch Series
• HPC Training through the NERSC User Group, collaborations with Bay Area labs and universities, and HPC University

Presentations

• Performance Monitoring on NERSC's POWER 5, ScicomP14, Poughkeepsie, N.Y., May 22, 2008.
Seaborg: A Reliable Extraordinary Resource for Extraordinary Science, NERSC/IBM Quarterly Meeting, Austin, TX, Feb. 12, 2008.
• Getting Started on Jacquard , Presentation to CS267 class at UC Berkeley, Feb. 1, 2008
• NERSC Overview, Princeton Plasma Physics Laboratory, Nov. 19, 2007.
• Running Jobs on Franklin, NERSC Users Group Meeting, Berkeley Lab, Oakland Scientific Facility, September 19, 2007.
• Application and System Memory Use, Configuration and Problems on Bassi, ScicomP 13, Garching by Munich, Germany, July 18, 2007
• Bassi Overview and Status, NERSC User Group Meeting, Princeton Plasma Physics Laboratory, Princeton, NJ, June 13, 2006
• Experiences Configuring, Debugging, Validating and Running on Bassi, NERSC User Group Meeting, Princeton Plasma Physics Laboratory, Princeton, NJ, June 13, 2006
• Jacquard Overview, NERSC User's Group Meeting, Berkeley Lab, Oakland Scientific Facility, October 3, 2005
• A Project to Measure and Characterize Performance of the Heterogeneous Workload on NERSC's IBM SP , Presented at PERC HPC Performance Workshop, Oakland, CA, May 4, 2004.
• "Introduction to CPU performance analysis on Seaborg", Tutorial presented at Berkeley Lab and the Access Grid, October 27, 2003. [High Resolution HTML]
• "Introduction to IBM's profiling tools "HPMlib" and "PE Benchmarker", Tutorial presented at Berkeley Lab and the Access Grid, October 27, 2003. [High Resolution HTML]
• "Understanding and Using Profiling Tools on Seaborg," Tutorial presented at NERSC User's Group Meeting, Argonne, IL, May 30, 2003.
• "Seaborg Code Scalability Project," NERSC User Group business meeting, Argonne, IL, May 29, 2003; updated and presented again on September 25, 2003.
• "NERSC Update for Terascale Supernova Initiative SciDAC Project,", Miami Beach, FL, February 9, 2003.
• "Understanding and Using Profiling Tools on the SP," NERSC training class presented at the LBNL access grid site in Berkeley, CA, October 17, 2002.
• "Getting Started at NERSC,", Presentation to CS267 class at UC-Berkeley, Berkeley, CA, September 17, 2002.
• Performance profiling using hpmcount, poe+, and libhpm," Tutorial presented at the NERSC User Group meeting, Oakland, CA, June 4, 2002.
• "NERSC SciDAC Services," Collaboration Meeting of the Terascale Supernova Initiative SciDAC project. Dallas, TX, February 16, 2002.
• "I/O on the Cray T3E," NERSC Users Group, Berkeley Lab, Berkeley, CA, April 9, 1998

Professional Background

• 1977-82: sports writer/editor for the Gainesville (Fla.) Sun newspaper.
• 1983-85: attended the University of Florida, receiving B.S. in physics.
• 1985-93: Attended graduate school in physics at the University of Illinois at Champaign-Urbana. M.S. in 1986 and a Ph.D. in 1993. Thesis title:, Stellar and Gas Dynamics of Interacting Ring Galaxies. Graduate Advisor: Dr. Susan Lamb (Also see Colliding Galaxies Group). My thesis was based on computer models performed using Cray XMP and Cray 2 supercomputers at the National Center for Supercomputing Applications at the University of Illinois.
• 1993-96: National Research Council fellowship in the Space Sciences Division at NASA Ames Research Center in Mountain View, CA. While there I performed research on colliding galaxies and the stability of computer models of galaxies. My computer calculations were run on the Connection Machine and Cray C90 at Ames' Numerical Aerospace Simulation facility.
• 1996-present: Staff member, User Services Group, National Energy Research Scientific Computing Center, Lawrence Berkeley National Laboratory.

IMAX Cosmic Voyage Movie

While finishing my thesis I ran computer simulations and consulted on the visualization and animation of the Cosmic Voyage IMAX movie. My calculations and visualization ideas formed the basis for the portion of the movie depicting galactic collisions.

Research & CV

To come...

Reports

• Parallel Scaling Characteristics of Selected NERSC User Project Codes , March 2005.
• Parallel Performance of the XL Fortran random_number Intrinsic Function on Seaborg, Berkeley Lab report LBNL-53531
• Scaling and Performance Update for Beam-Beam Code, April 2003
• An Investigation of Reported Anomalies When Running the BeamBeam3D Code on Seaborg, February 2003

Published Papers

Refereed Journals

• Global Effects of Softening n-Body Galaxies: Gerber, R.A. 1996, Astrophysical Journal, 466, 724.
• A Stellar and Gas Dynamical Numerical Model of Ring Galaxies.: Gerber, R.A. & Lamb, S.A. 1996, Monthly Notices of the Royal Astronomical Society, 278, 345.
• A Model for Collisionally Induced Disturbed Structure in Disk Galaxies: Gerber, R.A. & Lamb, S.A. 1994, Astrophysical Journal, 431, 604.
• Galactic Scale Gas Flows in Colliding Galaxies: 3-dimensional, N-body/Hydrodynamics Experiments: Lamb, S.A., Gerber, R.A., & Balsara, D.S. 1994, Astrophysics & Space Science, 216, 337.
• Stellar and Gas Dynamics of Interacting Ring Galaxies: Gerber, R.A. 1993, Ph.D. Thesis, Department of Physics, University of Illinois at Urbana-Champaign.
• A Model of Ring Galaxies - ARP 147-like Systems: Gerber, R.A., Lamb, S.A., & Balsara, D.S. 1992, Astrophysical Journal, 399, L51.

Abstracts, Books, Procedings, etc.

• The Colliding Galaxy System Arp 119: Numerical Models and Infrared Observations: Hearn, Nathan C.; Lamb, Susan A.; Gruendl, Robert A.; Gerber, Richard A. 2000, Cosmic Evolution and Galaxy Formation: Structure, Interactions, and Feedback, The 3rd Guillermo Haro Astrophysics Conference. ASP Conference Proceedings, Vol. 215, edited by José Franco, Lena Terlevich, Omar López-Cruz, and Itziar Aretxaga. Astronomical Society of the Pacific, ISBN 1-58381-046-3, 2000., p.46.
• Velocity Fields in Impacted Gaseous Galactic Discs: A Numerical Survey using N-body/SPH Simulations: Lamb, S.A., Hearn, N.C., & Gerber, R.A. 1999, American Astronomical Society Meeting, 194, 0604.
• Starbursts in Collisionally Produced Ring Galaxies: Comparisons Between Numerical Models and Observed Systems: Lamb, S.A., Gerber, R.A., Rudnick, G.H., & Dewing, M. 1997, Revista Mexicana de Astronomia y Astrofisica Conference Series, 6, 151.
• A Comparison between Numerical Models of Collisionally Produced Ring Galaxies and Observed Systems: Rudnick, G.H., Lamb, S.A., Gerber, R.A., & Dewing, M. 1996, American Astronomical Society Meeting, 188, 0414.
• The Response of Disks to Oscillatory Modes in Galaxies: Gerber, R.A., Smith, B.F., & Steiman-Cameron, T.Y. 1995, American Astronomical Society Meeting, 187, 4804.
• Some Consequences of Using Gravitational Softening to Model N-body Galaxies: Gerber, R.A. 1995, American Astronomical Society Meeting, 186, 510.

References to Published Papers

Romano, R., Mayya, Y. D., & Vorobyov, E. I. 2008, Astronomical Journal Stellar Disks of Collisional Ring Galaxies. I. New Multiband Images, Radial Intensity and Color Profiles, and Confrontation with N-Body Simulations

Antunes, Alex & Wallin, John 2007, Astrophysical Journal Dynamical Parameters for AM 0644-741

Pechtl, S. & von Glasow, R. 2007, Geophysical Research Letters Reactive chlorine in the marine boundary layer in the outflow of polluted continental air: A model study

Curir, Anna 2006, Astrophysics and Space Science Ring Galaxies: The Dynamical Effect of the Halo and the Role of Shear Viscosity and Pressure Gradient Forces

Block, D. L., Bournaud, F., Combes, F., Groess, R., Barmby, P., Ashby, M. L. N., Fazio, G. G., Pahre, M. A., & Willner, S. P. 2006, Nature An almost head-on collision as the origin of two off-centre rings in the Andromeda galaxy

Finley, B. D. & Saltzman, E. S. 2006, Geophysical Research Letters Measurement of Cl<SUB>2</SUB> in coastal urban air

Griv, Evgeny 2005, Astrophysics and Space Science Origin of the Cartwheel Galaxy: Disk Instability?

Mayya, Y. D., Bizyaev, D., Romano, R., Garcia-Barreto, J. A., & Vorobyov, E. I. 2005, Astrophysical Journal The Detection of Nonthermal Radio Continuum Spokes and the Study of Star Formation in the Cartwheel

García-Barreto, J. A., Scoville, N. Z., Koda, J., & Sheth, K. 2005, Astronomical Journal CO in the Bipolar Radio Continuum Galaxy NGC 3367

Matthews, L. D. & de Grijs, R. 2004, Astronomical Journal Optical Imaging and Spectroscopy of the Edge-on Sbc Galaxy UGC 10043: Evidence for a Galactic Wind and a Peculiar Triaxial Bulge

Gao, Yu, Zhu, Ming, & Seaquist, E. R. 2003, Astronomical Journal Star Formation Across the Taffy Bridge: UGC 12914/15

Smith, Beverly J., Nowak, Michael, Donahue, Megan, & Stocke, John 2003, Astronomical Journal Chandra Observations of the Interacting NGC 4410 Galaxy Group

McDowell, J. C., Clements, D. L., Lamb, S. A., Shaked, S., Hearn, N. C., Colina, L., Mundell, C., Borne, K., Baker, A. C., & Arribas, S. 2003, Astrophysical Journal Chandra Observations of Extended X-Ray Emission in Arp 220

Berentzen, I., Athanassoula, E., Heller, C. H., & Fricke, K. J. 2003, Monthly Notices of the Royal Astronomical Society Numerical simulations of interacting gas-rich barred galaxies: vertical impact of small companions

Struck, Curtis & Smith, Beverly J. 2003, Astrophysical Journal Models of the Morphology, Kinematics, and Star Formation History of the Prototypical Collisional Starburst System NGC 7714/7715 = ARP 284

Lamb, Susan A. & Hearn, Nathan C. 2003, Astrophysics and Space Science Collisions and mergers of disk galaxies: Hydrodynamics of star forming gas

Marziani, P., Dultzin-Hacyan, D., D'Onofrio, M., & Sulentic, J. W. 2003, Astronomical Journal Arp 194: Evidence of Tidal Stripping of Gas and Cross-Fueling

Vergely, J.-L., Lançon, A., & Mouhcine 2002, Astronomy and Astrophysics An inverse method to recover the SFR and reddening properties from spectra of galaxies

Petrosian, A. R., Movsessian, T., Comte, G., Kunth, D., & Dodonov, S. 2002, Astronomy and Astrophysics Multi-wavelength study of a new sample of blue compact dwarf galaxies. IV. Optical multi-pupil spectroscopy of 18 objects

Hagan, S., Hameroff, S. R., & Tuszyński, J. A. 2002, Physical Review E Quantum computation in brain microtubules: Decoherence and biological feasibility

Stutz, Jochen, Ackermann, Ralf, Fast, Jerome D., & Barrie, Leonard 2002, Geophysical Research Letters Atmospheric reactive chlorine and bromine at the Great Salt Lake, Utah

Donahue, Megan, Smith, Beverly J., & Stocke, John T. 2002, Astronomical Journal Star Formation in the radio galaxy NGC 4410A

García-Barreto, J. Antonio, Franco, José, & Rudnick, Lawrence 2002, Astronomical Journal VLA High-Resolution 1.4 and 8.4 GHz Mapping of the Barred Galaxy NGC 3367

Toyota, Kenjiro, Takahashi, Masaaki, & Akimoto, Hajime 2001, Geophysical Research Letters Modeling multi-phase halogen chemistry in the marine boundary layer with size-segregated aerosol module: Implications for quasi-size-dependent approach

Hearn, Nathan C. & Lamb, Susan A. 2001, Astrophysical Journal Arp 119: A High-Speed Galaxy Collision With Episodic Star Formation

Peterson, M. C. & Honrath, R. E. 2001, Geophysical Research Letters Observations of rapid photochemical destruction of ozone in snowpack interstitial air

Marziani, P., Dultzin-Hacyan, D., Krongold, Y., & D'Onofrio, M. 2001, The Central Kiloparsec of Starbursts and AGN: The La Palma Connection Evidence of Cross-Fueling in Active Galaxies

Hearn, N. C. & Lamb, S. A. 2001, Gas and Galaxy Evolution Large-Scale Gas Flows in Impacted Disk Galaxies: Results from Numerical Simulations

Lamb, S. A. & Hearn, N. C. 2001, Gas and Galaxy Evolution Colliding Galaxies, Star Formation, and Galactic Evolution

Lamb, S. A. & Hearn, N. C. 2001, Galaxy Disks and Disk Galaxies Sequenced Star Bursts in Colliding Galaxies

Mochida, Michihiro, Hirokawa, Jun, & Akimoto, Hajime 2000, Geophysical Research Letters Unexpected large uptake of O<SUB>3</SUB> on sea salts and the observed Br<SUB>2</SUB> formation

Lin, D. N. C. & Murray, S. D. 2000, Astrophysical Journal On the Two-Phase Structure of Protogalactic Clouds

Ghosal, S., Shbeeb, A., & Hemminger, J. C. 2000, Geophysical Research Letters Surface segregation of bromine in bromide doped NaCl: Implications for the seasonal variations in Arctic ozone

Namboodiri, P. M. S. 2000, Celestial Mechanics and Dynamical Astronomy Oscillations In Galaxies

Lamb, Susan A. & Hearn, Nathan C. 2000, Cosmic Evolution and Galaxy Formation: Structure, Interactions, and Feedback Galaxy Collisions and Star Formation

Jarrett, T. H., Helou, G., Van Buren, D., Valjavec, E., & Condon, J. J. 1999, Astronomical Journal A Near- and Mid-Infrared Study of the Interacting Galaxy Pair UGC 12914/12915: ``Taffy''

Arribas, S., Mediavilla, E., del Burgo, C., & García-Lorenzo, B. 1999, Astrophysical Journal Two-dimensional Spectroscopy in the Circumnuclear Region of the Seyfert 1 Ring Galaxy NGC 985

Sommer-Larsen, Jesper, Vedel, Henrik, & Hellsten, Uffe 1998, Astrophysical Journal The Structure of Isothermal, Self-gravitating, Stationary Gas Spheres for Softened Gravity

Lamb, Susan A., Hearn, Nathan C., & Gao, Yu 1998, Astrophysical Journal Progressive Star Bursts and High Velocities in the Infrared-luminous, Colliding Galaxy ARP 118

Bekki, Kenji 1998, Astrophysical Journal Formation of a Polar Ring Galaxy in a Galaxy Merger

Chatzichristou, Eleni T., Vanderriest, Christian, & Lehnert, Matthew 1998, Astronomy and Astrophysics Bidimensional spectroscopy of double galaxies. II. MKN 789, UGC 4085, UGC 3995

Struck, Curtis 1997, Astrophysical Journal Supplement Series Simulations of Collisions between Two Gas-rich Galaxy Disks with Heating and Cooling

Romeo, A. B. 1997, Astronomy and Astrophysics Dynamical effects of softening in N-body simulations of disc galaxies. Method and first applications.

Smith, Beverly J., Struck, Curtis, & Pogge, Richard W. 1997, Astrophysical Journal Atomic Hydrogen and Star Formation in the Bridge/Ring Interacting Galaxy Pair NGC 7714/7715 (Arp 284)

Wachlin, F. C. & Muzzio, J. C. 1997, Celestial Mechanics and Dynamical Astronomy Testing Galactic Oscillations

Appleton, P. N. & Marston, A. P. 1997, Astronomical Journal Multiwavelength Observations of Collisional Ring Galaxies.I.Broad-Band Images, Global Properties, and Radial Colors of the Sample Galaxies

Struck, Curtis, Appleton, Philip N., Borne, Kirk D., & Lucas, Ray A. 1996, Astronomical Journal Hubble Space Telescope Imaging of Dust Lanes and Cometary Structures in the Inner Disk of the Cartwheel Ring Galaxy

Perez Garcia, A. M. & Rodriguez Espinosa, J. M. 1996, Astronomical Journal A Companion Nuclear Bulge to the Seyfert Ring Galaxy NGC 985

Garcia-Barreto, J. A., Franco, J., & Carrillo, R. 1996, Astrophysical Journal On the Origin of the Southwest H alpha Regions of the Spiral Galaxy NGC 3367

Appleton, P. N., Charmandaris, V., & Struck, C. 1996, Astrophysical Journal The Head-on Collision between Two Gas-rich Galaxies: Neutral Hydrogen Debris from the Centrally Smooth Ring Galaxy VII ZW 466

Inoue, Motoko Y., Kameno, Seiji, Kawabe, Ryohei, Inoue, Makoto, Hasegawa, Tetsuo, & Tanaka, Masuo 1996, Astronomical Journal Millimeter CO and Near-Infrared H/2 Emission at the Center of cD/Seyfert Galaxy NGC 1275

Curir, A. & Filippi, R. 1996, Astronomy and Astrophysics N-body simulations of ring galaxies. Kinematical properties.

Struck, Curtis 1996, The Minnesota Lectures on Extragalactic Neutral Hydrogen Radial Density Waves

Elmegreen, Debra Meloy, Kaufman, Michele, Brinks, Elias, Elmegreen, Bruce G., & Sundin, Maria 1995, Astrophysical Journal The Interaction between Spiral Galaxies IC 2163 and NGC 2207. I. Observations

Mazzei, P., Curir, A., & Bonoli, C. 1995, Astronomical Journal Self-Consistent Evolution of Ring Galaxies

Marston, A. P. & Appleton, P. N. 1995, Astronomical Journal Multiwavelength observations of ring galaxies. 2: Global star formation in ring galaxies

Bernabei, R. 1995, Nuovo Cimento Rivista Serie Researches on dark matter.

Marziani, P., Keel, W. C., Dultzin-Hacyan, D., & Sulentic, J. W. 1994, Astrophysical Journal Multiple high-velocity emission-line systems in the E + S pair CPG 29

Wallin, John F. & Struck-Marcell, Curtis 1994, Astrophysical Journal Observations and models of the 'Sacred Mushroom': AM 1724-622

Elmegreen, B. G., Kaufman, M., & Thomasson, M. 1993, Astrophysical Journal An interaction model for the formation of dwarf galaxies and 10 exp 8 solar mass clouds in spiral disks

Calendar

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