NERSCPowering Scientific Discovery for 50 Years

Publications

2020

Hendrickson, Bruce; Bland, Buddy; Chen, Jackie; Colella, Phil; Dart, Eli; Dongarra, Jack; Dunning, Thom; Foster, Ian; Gerber, Richard; Harken, Rachel, et al., "ASCR@40: Highlights and Impacts of ASCR's Programs", June 1, 2020,

2018

Gerber, Richard; Hack, James; Riley, Katherine; Antypas, Katie; Coffey, Richard; Dart, Eli; Straatsma, Tjerk; Wells, Jack; Bard, Deborah; Dosanjh, Sudip, et al., "Crosscut report: Exascale Requirements Reviews", January 22, 2018,

2017

Richard A. Gerber, Jack Deslippe, Manycore for the Masses Part 2, Intel HPC DevCon, November 11, 2017,

Richard A Gerber, NERSC Overview - Focus: Energy Technologies, November 6, 2017,

Richard A. Gerber, Current and Next Generation Supercomputing and Data Analysis at NERSC, HPC Distinguished Lecture, Iowa State University & Ames Laboratory, October 18, 2017,

Richard A. Gerber, NERSC Overview - Focus: Berkeley Rotary Club, October 18, 2017,

Richard A. Gerber, Cori KNL Update, IXPUG 2017, Austin, TX, September 26, 2017,

NERSC Science Highlights - September 2017, NERSC Users Group Meeting 2017, September 19, 2017,

Yun (Helen) He, Brandon Cook, Jack Deslippe, Brian Friesen, Richard Gerber, Rebecca Hartman­-Baker, Alice Koniges, Thorsten Kurth, Stephen Leak, Woo­Sun Yang, Zhengji Zhao, Eddie Baron, Peter Hauschildt, "Preparing NERSC users for Cori, a Cray XC40 system with Intel Many Integrated Cores", Concurrency and Computation: Practice and Experience, August 2017, 30, doi: 10.1002/cpe.4291

The newest NERSC supercomputer Cori is a Cray XC40 system consisting of 2,388 Intel Xeon Haswell nodes and 9,688 Intel Xeon‐Phi “Knights Landing” (KNL) nodes. Compared to the Xeon‐based clusters NERSC users are familiar with, optimal performance on Cori requires consideration of KNL mode settings; process, thread, and memory affinity; fine‐grain parallelization; vectorization; and use of the high‐bandwidth MCDRAM memory. This paper describes our efforts preparing NERSC users for KNL through the NERSC Exascale Science Application Program, Web documentation, and user training. We discuss how we configured the Cori system for usability and productivity, addressing programming concerns, batch system configurations, and default KNL cluster and memory modes. System usage data, job completion analysis, programming and running jobs issues, and a few successful user stories on KNL are presented.

Yun (Helen) He, Brandon Cook, Jack Deslippe, Brian Friesen, Richard Gerber, Rebecca Hartman­-Baker, Alice Koniges, Thorsten Kurth, Stephen Leak, Woo­Sun Yang, Zhengji Zhao, Eddie Baron, Peter Hauschildt, "Preparing NERSC users for Cori, a Cray XC40 system with Intel Many Integrated Cores", Cray User Group 2017, Redmond, WA. Best Paper First Runner-Up., May 12, 2017,

Richard A Gerber, February 2017 Allocations and Usage Update, February 23, 2017,

NERSC Users Group Webinar on 2017 allocations for Cori Knights Landing nodes and Queue Wait Time Reduction Actions

Richard A Gerber, NERSC Allocations Forecast for PIs, NERSC Users Group, February 16, 2017,

Richard A. Gerber, Allocations and Usage Update for DOE Program Managers, February 7, 2017,

Richard A. Gerber, NERSC's KNL System: Cori, Exascale Computing Project All-Hands Meeting, February 1, 2017,

Presented at the DOE Exascale Computing Project annual meeting in Knoxville, TN.

Richard A. Gerber, Overview of NERSC, Presented to SLAC Computing, January 24, 2017,

2016

Richard A Gerber, IXPUG Birds of a Feather Welcome, Birds of a Feather @ SC16, November 16, 2016,

Richard A. Gerber, Success Through Community, Closing Remarks at Intel HPC Developer Conference 2016, November 13, 2016,

R Gerber, J Deslippe, D Doerfler, Many Cores for the Masses: Lessons Learned from Application Readiness Efforts at NERSC for the Knights Landing based Cori System, Intel HPC Developers Conference, November 12, 2016,

Richard A Gerber, Using NERSC for Research in High Energy Physics Theory, Particle Physics Generators @ Fermilab, September 22, 2016,

Richard A Gerber, Application Readiness for KNL at NERSC, IXPUG 2016 Conference, September 20, 2016,

Richard A Gerber, IXPUG 2016 Welcome, IXPUG 2016 Conference, September 19, 2016,

Richard A Gerber, September 2016 NERSC Update, September 7, 2016,

Richard A Gerber, Application Performance on Intel Xeon Phi - Being Prepared for KNL and Beyond, ISC 2016 Workshop Introduction, June 23, 2016,

Richard A Gerber, Cori: Enabling World-Changing Science, Intel Collaboration Hub @ ISC 2016, June 22, 2016,

Gerber, Richard A., et al., "Application Performance on Intel Xeon Phi–Being Prepared for KNL and Beyond", High Performance Computing: ISC High Performance 2016 International Workshops, ExaComm, E-MuCoCoS, HPC-IODC, IXPUG, IWOPH, P3MA, VHPC, Frankfurt, Germany, June 19–23, 2016, Revised Selected Papers. Vol. 9945. Springer, 2016., June 19, 2016,

Gerber, Richard A., et al. "Application Performance on Intel Xeon Phi–Being Prepared for KNL and Beyond." High Performance Computing: ISC High Performance 2016 International Workshops, ExaComm, E-MuCoCoS, HPC-IODC, IXPUG, IWOPH, P3MA, VHPC, Frankfurt, Germany, June 19–23, 2016, Revised Selected Papers. Vol. 9945. Springer, 2016.

Richard A Gerber, NERSC Allocations 2016-17, June 14, 2016,

Richard A Gerber, High Performance Computing and NERSC for High School Students, June 6, 2016,

Ashley Barker, Chris Fusion, Richard Gerber, Yun (Helen) He, Frank Indiviglio, Best Practices for Managing HPC User Documentation and Communication, Cray User Group Meeting 2016, London, England, May 10, 2016,

Salman Habib, Robert Roser (HEP Leads), Richard Gerber, Katie Antypas, Katherine Riley, Tim Williams, Jack Wells, Tjerk Straatsma (ASCR Leads), A. Almgren, J. Amundson, S. Bailey, D. Bard, K. Bloom, B. Bockelman, A. Borgland, J. Borrill, R. Boughezal, R. Brower, B. Cowan, H. Finkel, N. Frontiere, S. Fuess, L. Ge, N. Gnedin, S. Gottlieb, O. Gutsche, T. Han, K. Heitmann, S. Hoeche, K. Ko, O. Kononenko, T. LeCompte, Z. Li, Z. Lukic, W. Mori, P. Nugent, C.-K. Ng, G. Oleynik, B. O'Shea, N. Padmanabhan, D. Petravick, F.J. Petriello, J. Power, J. Qiang, L. Reina, T.J. Rizzo, R. Ryne, M. Schram, P. Spentzouris, D. Toussaint, J.-L. Vay, B. Viren, F. Wurthwein, L. Xiao, "ASCR/HEP Exascale Requirements Review Report", arXiv:1603.09303 [physics.comp-ph], March 31, 2016,

Clayton Bagwell, Richard Gerber, NUG 2016 Business Meeting: Allocations, NUG Business Meeting presentation, March 24, 2016,

NUG (NERSC Users Group) Business meeting: Allocations

Clayton Bagwell, Richard Gerber, NERSC Brown Bag: Allocations, NERSC Brown Bag presentation, March 17, 2016,

Brown Bag presentation to NERSC staff on how Allocations work and the new scavenger queues.

Richard A Gerber, Application Preparedness for Next Generation Computational Systems and Integration with Data-Intensive Workflows, February 26, 2016,

Richard A. Gerber, NERSC Science and Strategic Results, February 16, 2016,

2015

Richard A. Gerber, Katie Antypas, Sudip Dosanjh, Jack Deslippe, Nick Wright, Jay Srinivasan, Systems Roadmap and Plans for Supporting Extreme Data Science, December 10, 2015,

Yun (Helen) He, Alice Koniges, Richard Gerber, Katie Antypas, Using OpenMP at NERSC, OpenMPCon 2015, invited talk, September 30, 2015,

Alice Koniges, Tim Mattson, Yun (Helen) He, Richard Gerber, Enabling Application Portability across HPC Platforms: An Application Perspective, OpenMPCon 2015, invited talk, September 29, 2015,

N.J. Wright, S. S. Dosanjh, A. K. Andrews, K. Antypas, B. Draney, R.S Canon, S. Cholia, C.S. Daley, K. M. Fagnan, R.A. Gerber, L. Gerhardt, L. Pezzaglia, Prabhat, K.H. Schafer, J. Srinivasan, "Cori: A Pre-Exascale Computer for Big Data and HPC Applications", Big Data and High Performance Computing 26 (2015): 82., ( June 2015) doi: 10.3233/978-1-61499-583-8-82

Extreme data science is becoming increasingly important at the U.S. Department of Energy's National Energy Research Scientific Computing Center (NERSC). Many petabytes of data are transferred from experimental facilities to NERSC each year. Applications of importance include high-energy physics, materials science, genomics, and climate modeling, with an increasing emphasis on large-scale simulations and data analysis. In response to the emerging data-intensive workloads of its users, NERSC made a number of critical design choices to enhance the usability of its pre-exascale supercomputer, Cori, which is scheduled to be delivered in 2016. These data enhancements include a data partition, a layer of NVRAM for accelerating I/O, user defined images and a customizable gateway for accelerating connections to remote experimental facilities.

Richard Gerber, Harvey Wasserman, "Large Scale Production Computing and Storage Requirements for Advanced Scientific Computing Research: Target 2017", April 28, 2015,

Richard Gerber, NERSC Science 2014, February 24, 2015,

Richard A. Gerber, Performance and Debugging Tools for HPC, February 17, 2015,

Guest lecture in UC Berkeley CS 267 - Applications of Parallel Computers

Richard Gerber, Harvey Wasserman, "Large Scale Computing and Storage Requirements for Nuclear Physics - Target 2017", January 28, 2015,

2014

Richard A. Gerber, Exascale Computing, Big Data, and World-Class Science at NERSC, November 13, 2014,

Talk given at San Jose State University Physics Department colloquium on Nov. 13, 2014.

Richard A. Gerber et al., "High Performance Computing Operational Review: Enabling Data-Driven Scientific Discovery at DOE HPC Facilities", November 7, 2014,

K. Antypas, B.A Austin, T.L. Butler, R.A. Gerber, C.L Whitney, N.J. Wright, W. Yang, Z Zhao, "NERSC Workload Analysis on Hopper", Report, October 17, 2014, LBNL 6804E,

Richard A. Gerber, Harvey J. Wasserman, "Large Scale Computing and Storage Requirements for Basic Energy Sciences: Target 2017", October 10, 2014,

Richard A. Gerber et al., "DOE High Performance Computing Operational Review (HPCOR): Enabling Data-Driven Scientific Discovery at DOE HPC Facilities", September 17, 2014,

Richard A. Gerber, Harvey J. Wasserman, "Large Scale Computing and Storage Requirements for Fusion Energy Sciences: Target 2017", May 1, 2014,

Richard A. Gerber, Support for Astronomy and Astrophysics at NERSC, April 3, 2014,

Sudip Dosanjh, Shane Canon, Jack Deslippe, Kjiersten Fagnan, Richard Gerber, Lisa Gerhardt, Jason Hick, Douglas Jacobsen, David Skinner, Nicholas J. Wright, "Extreme Data Science at the National Energy Research Scientific Computing (NERSC) Center", Proceedings of International Conference on Parallel Programming – ParCo 2013, ( March 26, 2014)

Richard A. Gerber, Helen He, Woo-Sun Yang, Debugging and Optimization Tools, Presented at UC Berkeley CS267 class, February 2014, February 19, 2014,

Richard A. Gerber, NERSC, NERSC 2013 User Survey Results, February 6, 2014,

Richard A. Gerber, NERSC, NERSC Requirement Reviews for NUG 2014, February 6, 2014,

Kim Cupps, et al., "High Performance Computing Operations Review Report", January 6, 2014,

2013

Richard A. Gerber, Communicating with NERSC Communities, November 20, 2013,

Richard A Gerber, Zhengji Zhao, NERSC Job Data, November 20, 2013,

Richard A. Gerber, "NERSC’s Edison Delivers High-Impact Science Results From Day One", November 2013,

NERSC’s Edison Delivers High-Impact Science Results From Day One, SC13 display poster.

Richard A. Gerber, "Bringing Better Materials to Market in Half the Time", November 2013,

Bringing Better Materials to Market in Half the Time, SC13 poster

Richard Gerber (Berkeley Lab), Ken Bloom (U. Nebraska-Lincoln), "Report of the Snowmass 2013 Computing Frontier Working Group on Distributed Computing and Facility Infrastructures", to be included in proceedings of Community Summer Study ("Snowmass") 2013, November 11, 2013,

A. Koniges, R. Gerber, D. Skinner, Y. Yao, Y. He, D. Grote, J-L Vay, H. Kaiser, and T. Sterling, "Plasma Physics Simulations on Next Generation Platforms", 55th Annual Meeting of the APS Division of Plasma Physics, Volume 58, Number 16, November 11, 2013,

The current high-performance computing revolution provides opportunity for major increases in computational power over the next several years, if it can be harnessed. This transition from simply increasing the single-processor and network performance to a different architectural paradigms forces application programmers to rethink the basic models of parallel programming from both the language and problem division standpoints. One of the major computing facilities available to researchers in fusion energy is the National Energy Research Scientific Computing Center. As the mission computing center for DOE, Office of Science, NERSC is tasked with helping users to overcome the challenges of this revolution both through the use of new parallel constructs and languages and also by enabling a broader user community to take advantage of multi-core performance. We discuss the programming model challenges facing researchers in fusion and plasma physics in for a variety of simulations ranging from particle-in-cell to fluid-gyrokinetic and MHD models.

Richard Gerber and Harvey Wasserman, eds., "Large Scale Computing and Storage Requirements for High Energy Physics - Target 2017", November 8, 2013,

Richard Gerber, NUG Webinar for November 2013, November 7, 2013,

Richard Gerber, Edison Overview (Focus on hardware relevant for performance), October 10, 2013,

Richard Gerber, Data-Driven Science at NERSC, August 8, 2013,

Richard Gerber, High-Performance Parallel I/O, August 6, 2013,

Richard Gerber, NERSC/Berkeley Lab and Ken Bloom, University of Nebraska-Lincoln, Snowmass Computing Frontier I2: Distributed Computing and Facility Infrastructures, July 31, 2013,

Richard Gerber, Dirac Science Highlights 2013, June 25, 2013,

Richard Gerber, Introduction to High Performance Computing, June 10, 2013,

Introduction to High Performance Computing presented to Berkeley Lab Computing Sciences summer interns.

Richard Gerber, Harvey Wasserman, "High Performance Computing and Storage Requirements for Biological and Environmental Research Target 2017", June 6, 2013, LBNL LBNL-6256E,

Richard A. Gerber, HIgh Performance Computing and Big Data (for High Energy Physics theory), April 2, 2013,

Richard A. Gerber, Fusion Energy Sciences Requirements Review Overview and Goals, March 19, 2013,

Richard Gerber, NUG March 2013 Webinar, March 7, 2013,

NERSC User Group Teleconference and Webinar Slides for March 7, 2013

Richard A. Gerber, Debugging and Optimization Tools, February 19, 2013,

Debugging and Optimization Tools, presented for UC Berkeley CS267 "Applications of Parallel Computers" class, Feb. 19, 2013.

Richard Gerber, Trends, Discovery, & Innovation at NUG User Day 2013, February 19, 2013,

Richard A. Gerber, Tina Declerck. Zhengji Zhao, Edison Update, February 12, 2013,

Overview and update on the installation and configuration of Edison, NERSC's new Cray XC30 supercomputer.

Richard A. Gerber, Harvey Wasserman, NERSC Requirements Reviews, February 12, 2013,

An update on the NERSC Requirements Reviews at NUG 2013. Richard Gerber and Harvey Wasserman, NERSC>

Richard Gerber, Requirements Reviews Update, February 12, 2013,

Richard A. Gerber, Getting Started at NERSC, January 17, 2013,

Getting Started at NERSC Webinar, January 17, 2013, Richard Gerber, NERSC User Services

Richard Gerber, Kathy Yelick, Lawrence Berkeley National Laboratory, "Data Requirements from NERSC Requirements Reviews", January 9, 2013,

2012

Richard A. Gerber, Job Analytics, November 8, 2012,

Richard A. Gerber, Batch Strategies of Maximizing Throughput and Allocation, NERSC Users Group Monthly Webinar, October 2012, October 4, 2012,

Richard A. Gerber, Uses for High Performance Computing, June 12, 2012,

Who uses High Performance Computing and what do they do with it? Presented for LBNL Summer Interns, June 12, 2012.

Richard A. Gerber, Introduction to High Performance Computers, June 12, 2012,

Introduction for High Performance Computers. Presented to LBNL Summer Interns, June 12, 2012.

Richard A. Gerber, Challenges in HPC, June 12, 2012,

Challenges in High Performance Computing. Presented to LBNL Summer Interns, June 12, 2012.

Richard A. Gerber, Harvey J. Wasserman, "Large Scale Computing and Storage Requirements for Nuclear Physics", Workshop, March 26, 2012, LBNL LBNL-5355E,

Report of the user requirements workshop for lattice gauge theory and nuclear physics computation at NERSC that took place May 26, 2011

Debugging and Optimization Tools, Presented to UC Berkeley CS 267 Class, Applications of Parallel Computer, February 16, 2012,

User Requirements Gathered for the NERSC7 Procurement, February 3, 2012,

Richard A. Gerber, Harvey J. Wasserman, "Large Scale Computing and Storage Requirements for Advanced Computational Science Research", Workshop, January 2012, LBNL LBNL-5249E,

2011

Richard A. Gerber, Harvey J. Wasserman, "Large Scale Computing and Storage Requirements for Fusion Energy Sciences", Workshop, December 2011,

HPC I/O in Scaling  to  Petascale  and  Beyond:  Performance  Analysis  and  Optimization  of  Applications, SC11, November 13, 2011,

Richard A. Gerber, Introduction to HPC Systems, NERSC New User Training, September 13, 2011,

Richard A. Gerber, Experiences with Tools at NERSC, Programming weather, climate, and earth-­‐system models on heterogeneous mul-­‐core platforms, NCAR, Boulder, CO, September 7, 2011,

NERSC Overview for Environmental Energy Technologies, Berkeley Lab, Environmental Energy Technologies Division, Berkeley, CA, June 2011,

Richard A. Gerber, Harvey J. Wasserman, "Large Scale Computing and Storage Requirements for Basic Energy Sciences", Workshop, June 10, 2011, LBNL LBNL-4809E,

Getting Started at NERSC, NERSC Training Webinar Berkeley Lab OSF, Oakland, CA, June 7, 2011,

NERSC Overview for the Joint Genome Institute, DOE Joint Genome Institute, Walnut Creek, CA, May 2, 2011,

Richard Gerber, Computers - BSA Merit Badge, March 2011,

Richard Gerber, Debugging and Optimization Tools, Presented to CS267 class at UC-Berkeley, February 11, 2011,

2010

Richard A. Gerber, Harvey J. Wasserman, "Large Scale Computing and Storage Requirements for High Energy Physics", Workshop, November 15, 2010,

Richard A. Gerber, Large Scale Computing and Storage Requirements for High Energy Physics, NUG 2010, Cray Quarterly, NERSC OSF, Oakland, CA, October 28, 2010,

Richard A. Gerber, Introduction to Computing at NERSC, October 20, 2010,

Submitting and Running Jobs on the Cray XT5, Joint XT Workshop, Berkeley, CA, February 1, 2010,

2009

Richard A. Gerber, Harvey J. Wasserman, "Large Scale Computing and Storage Requirements for Biological and Environmental Research", Workshop, October 19, 2009, LBNL LBNL-2710E,

Computing and Storage Requirements for Biological and Environmental Research, NUG 2009, Boulder, CO, October 7, 2009,

W. Allcock, R. Carlson, S. Cotter, E. Dart, V. Dattoria, B. Draney, R. Gerber, M. Helm, J. Hick, S. Hicks, S. Klasky, M. Livny, B. Maccabe, C. Morgan, S. Morss, L. Nowell, D. Petravick, J. Rogers, Y. Sekine, A. Sim, B. Tierney, S. Turnbull, D. Williams, L. Winkler, F. Wuerthwein, "ASCR Science Network Requirements", Workshop, April 15, 2009,

ESnet publishes reports from Network and Science Requirement Workshops on a regular basis.  This report was the product of a two-day workshop in Washington DC that addresses science requirements impacting operations of networking for 2009.

Richard A. Gerber, Breakthrough Science at NERSC, Cray Technical Workshop, Isle of Pines, SC, February 25, 2009,

2008

Richard A. Gerber, Franklin File Systems and I/O, NERSC Users Group, Oakland, CA, October 2, 2008,

Richard Gerber, "Franklin Interactive Node Responsiveness", June 9, 2008,

Richard A. Gerber, Performance Monitoring on NERSC’s POWER 5 System, May 22, 2008,

2007

Richard A. Gerber, Running Jobs on Franklin, September 19, 2007,

Richard A. Gerber, Application and System Memory Use, Configuration, and Problems on Bassi, July 17, 2007,

2006

Richard A. Gerber, Bassi - NERSC's New IBM POWER 5, NUG 2006, Princeton, NJ, June 13, 2006,

Richard A. Gerber, Experiences Configuring, Validating, and Monitoring Bassi, NUG 2006, Princeton, NJ, June 13, 2006,

2000

Nathan C. Hearn, Susan A. Lamb, Robert A. Gruendl (Univ. of Ill.), Richard A. Gerber (NERSC/Berkeley Lab), "The Colliding Galaxy System Arp 119: Numerical Models and Infrared Observations", Astronomical Society of the Pacific Conference Series, January 17, 2000, 215:46H,

1999

Lamb, S. A.; Hearn, N. C.; Gerber, R. A., "Velocity Fields in Impacted Gaseous Galactic Discs: A Numerical Survey using N-body/SPH Simulations", Bulletin of the American Astronomical Society, May 17, 1999, 31:829,

1997

Lamb, S. A.; Gerber, R. A.; Rudnick, G. H.; Dewing, M., "Starbursts in Collisionally Produced Ring Galaxies: Comparisons Between Numerical Models and Observed Systems", Revista Mexicana de Astronomia y Astrofisica Serie de Conferencias, May 3, 1997, 6:151,

1996

Richard A. Gerber, "Global Effects of Softening n-Body Galaxies", Astrophysical Journal, August 1, 1996, 466:724-731,

Smith, B.F.; Gerber, R.A.; Steiman-Cameron, T.Y.; Miller, R.H., "The Response of Disks to Oscillatory Modes in Galaxies", Bulletin of the American Astronomical Society, June 17, 1996, 28:1189,

Rudnick, G. H.; Lamb, S. A.; Gerber, R. A.; Dewing, M., "A Comparison between Numerical Models of Collisionally Produced Ring Galaxies and Observed Systems", Bulletin of the American Astronomical Society, May 13, 1996, 28:826,

Gerber, R.A. & Lamb, S.A., "A Stellar and Gas Dynamical Numerical Model of Ring Galaxies", Monthly Notices of the Royal Astronomical Society, January 8, 1996, 278:345,

1995

Gerber, R. A.; Smith, B. F.; Steiman-Cameron, T. Y., "The Response of Disks to Oscillatory Modes in Galaxies", Bulletin of the American Astronomical Society, December 11, 1995, 27:1353,

Gerber, Richard A, "Some Consequences of Using Gravitational Softening to Model N-body Galaxies", Bulletin of the American Astronomical Society, June 12, 1995, 27:1201,

1994

Lamb, S. A.; Gerber, R. A.; Balsara, D. S., "Off-Center Collisions Involving Rotating Disk Galaxies: 3-D Numerical Simulations", Bulletin of the American Astronomical Society, December 12, 1994, 26:1430,

Richard A. Gerber and Susan A. Lamb, "A Model for Collisionally Induced Disturbed Structure in Disk Galaxies", Astrophysical Journal, August 20, 1994, 431:604-616,

Susan A. Lamb, NORDITA and Neils Bohr Institute; Richard A. Gerber University of Illinois at Urbana-Champaign; and Dinshaw Balsara, Johns Hopkins University, "Galactic Scale Gas Flows in Colliding Galaxies: a-Dimensional, N-bodyjHydrodynamics Experiments", Astrophysics and Space Science, May 1994, 216:337-346,

Gerber, Richard A., "Some Consequences of Using Gravitational Softening to Model N-body Galaxies", Bulletin of the American Astronomical Society, March 1994, 27:885,

1993

Stellar and gas dynamics of interacting ring galaxies, Richard A. Gerber, Ph.D., October 1, 1993,

Susan A. Lamb, Richard A. Gerber, Dinshaw S. Balsara, "Galaxies in Collision: The Formation of Rings and Arcs", Astron. Ges., Abstr. Ser, June 1, 1993, 8:56,

Stellar and Gas Dynamics of Interacting Ring Galaxies: Front Material, Richard A. Gerber, May 1993,

Stellar and Gas Dynamics of Interacting Ring Galaxies: Chapter 1 - Introduction, Richard A. Gerber, May 1993,

1992

Richard A. Gerber, Susan A. Lamb, and Dinshaw Balsara, "A Model of Ring Galaxies: Arp 147-Like Systems", Astrophysical Journal, November 1, 1992, 399:L51-L54,

Gerber, R. A.; Lamb, S. A., "Models for Collisionally Induced Disturbed Structure in Disk Galaxies", Bulletin of the American Astronomical Society, May 18, 1992, 24:811,

1991

Gerber, R. A.; Lamb, S. A.; Balsara, D. S., "A Model for Ring Galaxies: Arp 147-Like Systems", Bulletin of the American Astronomical Society, September 17, 1991, 23:1391G,

R.A. Gerber, S.A. Lamb (Univ. of Ill.), and D.S. Balsara (JHU), "Ring Formation in Off-Axis Collisions of Galaxies", Bulletin of the American Astronomical Society, March 11, 1991, BAAS 23:953G,

1990

Gerber, Richard A.; Balsara, Dinshaw S.; Lamb, Susan A, "Dynamical experiments on models of colliding disk galaxies", NASA, Marshall Space Flight Center, Paired and Interacting Galaxies: International Astronomical Union Colloquium, November 12, 1990, 124:737-742,

R.A. Gerber, S.A. Lamb (Univ. of Illinois at Urbana-Champaign), D.S. Balsara (Johns Hopkins Univ.), "Combined Hydrodynamical and N-Body Studies of Colliding Galaxies: The Formation of Ring Galaxies", 177th Meeting of the American Astronomical Society, July 9, 1990, 22:1243G,

Gerber, R. A. and Lamb, S. A. and Miller, R. H., and Smith, B. F., "Models of colliding galaxies: kinetic energy and density enhancement", Dynamics and Interactions of Galaxies, Proceedings, Springer, Berlin (Germany, F.R.), June 4, 1990, 223,

Gerber. R. A.; Lamb, S. A.; Miller, R. H.; Smith, B. F., "Potential Sites for Star Formation in Colliding Galaxies", Astrophysics and Space Science Library, Workshop of the Advanced School of Astronomy, February 12, 1990, 160:366G,

Lamb, S. A.; Miller, R. H.; Gerber, R. A.; Smith, B. F., "Models of Colliding Galaxies: Kinetic Energy and Density Enhancements", Astrophysics and Space Science Library, Kona Symposium of Millimetre and Submillimetre Astronomy, January 8, 1990, 158:235L,

1989

R. A. Gerber, D. S. Balsara, and S. A. Lamb (Univ. of Ill.), "Potential Sites of Star Formation in Interacting Galaxies: Numerical Experiments", Bulletin of the American Astronomical Society, September 11, 1989, 21:1163G,

1988

S.A Lamb, R.A. Gerber (U. Illinois), R.H. Miller (U. Chicago), B.F. Smith (NASA/Ames), "Models of Colliding Galaxies: Kinetic Energy and Density Enhancements", 173rd Meeting of the American Astronomical Society, September 10, 1988,