Hari Krishnan

Harinarayan (Hari) Krishnan

Group Leader

Computer Systems Engineer

Phone: +1 510 495 2815

Hari Krishnan holds a Ph.D. in computer science and leads the Software Design for Experimental Science Group. As a computer systems engineer at Lawrence Berkeley National Laboratory, his research focuses on scientific visualization on HPC platforms and many-core architectures. He leads the development effort on several HPC-related projects which includes research on new visualization methods, optimizing scaling and performance on NERSC machines, working on data model optimized I/O libraries, and enabling remote workflow services. As a member of The Center for Advanced Mathematics for Energy Research Applications(CAMERA), he supports the development of the software infrastructure, works on accelerating image analysis algorithms and reconstruction techniques. He is also an active developer of several major open-source projects which include VisIt, NiCE, H5hut, and has developed plugins that support performant-centric scalable image filtering and analysis routines in Fiji/ImageJ.

Journal Articles

Dáithí A Stone, Mark D Risser, Oliver M Angélil, Michael F Wehner, Shreyas Cholia, Noel Keen, Harinarayan Krishnan, Travis A O Brien, William D Collins, "A basis set for exploration of sensitivity to prescribed ocean conditions for estimating human contributions to extreme weather in CAM5. 1-1degree", Weather and climate extremes, 2018, 19:10--19,

MF Wehner, KA Reed, B Loring, D Stone, H Krishnan, "Changes in tropical cyclones under stabilized 1.5 and 2.0°C global warming scenarios as simulated by the Community Atmospheric Model under the HAPPI protocols", Earth System Dynamics, 2018, 9:187--195, doi: 10.5194/esd-9-187-2018

RJ Pandolfi, DB Allan, E Arenholz, L Barroso-Luque, SI Campbell, TA Caswell, A Blair, F De Carlo, S Fackler, AP Fournier, G Freychet, M Fukuto, D Gürsoy, Z Jiang, H Krishnan, D Kumar, RJ Kline, R Li, C Liman, S Marchesini, A Mehta, AT N Diaye, DY Parkinson, H Parks, LA Pellouchoud, T Perciano, F Ren, S Sahoo, J Strzalka, D Sunday, CJ Tassone, D Ushizima, S Venkatakrishnan, KG Yager, P Zwart, JA Sethian, A Hexemer, "Xi-cam: a versatile interface for data visualization and analysis", Journal of Synchrotron Radiation, 2018, 25:1261--1270, doi: 10.1107/S1600577518005787

Timmermans, B., D. Stone, M. Wehner, and H. Krishnan, "Impact of tropical cyclones on modeled wind-wave climate", Geophysical Research Letters, 2017, 44:1393-1401, doi: 10.1002/2016GL071681

T Perciano, D Ushizima, H Krishnan, D Parkinson, N Larson, DM Pelt, W Bethel, F Zok, J Sethian, "Insight into 3D micro-CT data: Exploring segmentation algorithms through performance metrics", Journal of Synchrotron Radiation, 2017, 24:1065--1077, doi: 10.1107/S1600577517010955

M Farmand, R Celestre, P Denes, ALD Kilcoyne, S Marchesini, H Padmore, T Tyliszczak, T Warwick, X Shi, J Lee, YS Yu, J Cabana, J Joseph, H Krishnan, T Perciano, FRNC Maia, DA Shapiro, "Near-edge X-ray refraction fine structure microscopy", Applied Physics Letters, 2017, 110, doi: 10.1063/1.4975377

Benedikt J Daurer, Hari Krishnan, Talita Perciano, Filipe RNC Maia, David A Shapiro, James A Sethian, Stefano Marchesini, "Nanosurveyor: a framework for real-time data processing", Advanced structural and chemical imaging, 2017, 3:7,

O Angélil, D Stone, M Wehner, CJ Paciorek, H Krishnan, W Collins, "An independent assessment of anthropogenic attribution statements for recent extreme temperature and rainfall events", Journal of Climate, 2017, 30:5--16, doi: 10.1175/JCLI-D-16-0077.1

M. Wehner, D. Stone, H. Krishnan, K. AchutaRao, F. Castillo, "The deadly combination of heat and humidity in India and Pakistan in summer 201", Bulletin of the American Meteorological Society, 2016, 97:S81-S86, doi: 10.1175/BAMS-D-16-0145.2

S Marchesini, H Krishnan, BJ Daurer, DA Shapiro, T Perciano, JA Sethian, FRNC Maia, "SHARP: A distributed GPU-based ptychographic solver", Journal of Applied Crystallography, 2016, 49:1245--1252, doi: 10.1107/S1600576716008074

Deborah A Agarwal, Boris Faybishenko, Vicky L Freedman, Harinarayan Krishnan, Gary Kushner, Carina Lansing, Ellen Porter, Alexandru Romosan, Arie Shoshani, Haruko Wainwright, others, "A science data gateway for environmental management", Concurrency and Computation: Practice and Experience, 2016, 28:1994--2004,

DM Ushizima, HA Bale, EW Bethel, P Ercius, BA Helms, H Krishnan, LT Grinberg, M Haranczyk, AA Macdowell, K Odziomek, DY Parkinson, T Perciano, RO Ritchie, C Yang, "IDEAL: Images Across Domains, Experiments, Algorithms and Learning", JOM, 2016, 68:2963--2972, doi: 10.1007/s11837-016-2098-4

J Donatelli, M Haranczyk, A Hexemer, H Krishnan, X Li, L Lin, F Maia, S Marchesini, D Parkinson, T Perciano, D Shapiro, D Ushizima, C Yang, JA Sethian, "CAMERA: The Center for Advanced Mathematics for Energy Research Applications", Synchrotron Radiation News, 2015, 28:4--9, doi: 10.1080/08940886.2015.1013413

Tamay M. Ozgokmen, Andrew C. Poje, Paul F. Fischer, Hank Childs, Harinarayan Krishnan, Christoph Garth, Angelique C. Haza, Edward Ryan, "On multi-scale dispersion under the influence of surface mixed layer instabilities", Ocean Modelling, October 2012, 56:16-30,

Conference Papers

P Enfedaque, H Chang, H Krishnan, S Marchesini, "GPU-based implementation of ptycho-ADMM for high performance x-ray imaging", Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2018, 10860 LN:540--553, doi: 10.1007/978-3-319-93698-7_41

S Swaid, M Maat, H Krishnan, D Ghoshal, L Ramakrishnan, "Usability heuristic evaluation of scientific data analysis and visualization tools", Advances in Intelligent Systems and Computing, 2018, 607:471--482, doi: 10.1007/978-3-319-60492-3_45

T Perciano, D Ushizima, H Krishnan, D Parkinson, J Sethian, "FibriPy: A software environment for fiber analysis from 3D micro-computed tomography data", Advanced Materials - TechConnect Briefs 2017, 2017, 1:25--28,

DY Parkinson, DM Pelt, T Perciano, D Ushizima, H Krishnan, HS Barnard, AA MacDowell, J Sethian, "Machine learning for micro-tomography", Proceedings of SPIE - The International Society for Optical Engineering, 2017, 10391, doi: 10.1117/12.2274731

SV Venkatakrishnan, KA Mohan, K Beattie, J Correa, E Dart, JR Deslippe, A Hexemer, H Krishnan, AA MacDowell, S Marchesini, SJ Patton, T Perciano, JA Sethian, R Stromsness, BL Tierney, CE Tull, D Ushizima, DY Parkinson, "Making advanced scientific algorithms and big scientific data management more accessible", IS and T International Symposium on Electronic Imaging Science and Technology, 2016, doi: 10.2352/ISSN.2470-1173.2016.19.COIMG-155

DY Parkinson, K Beattie, X Chen, J Correa, E Dart, BJ Daurer, JR Deslippe, A Hexemer, H Krishnan, AA Macdowell, FRNC Maia, S Marchesini, HA Padmore, SJ Patton, T Perciano, JA Sethian, D Shapiro, R Stromsness, N Tamura, BL Tierney, CE Tull, D Ushizima, "Real-time data-intensive computing", AIP Conference Proceedings, 2016, 1741, doi: 10.1063/1.4952921

D Ushizima, T Perciano, H Krishnan, B Loring, H Bale, D Parkinson, J Sethian, "Structure recognition from high resolution images of ceramic composites", Proceedings - 2014 IEEE International Conference on Big Data, IEEE Big Data 2014, 2014, 683--691, doi: 10.1109/BigData.2014.7004292

David Camp, Hari Krishnan, David Pugmire, Christoph Garth, Ian Johnson, E. Wes Bethel, Kenneth I. Joy, and Hank Childs., "GPU Acceleration of Particle Advection Workloads in a Parallel, Distributed Memory Setting", Proceedings of Eurographics Symposium on Parallel Graphics and Visualization (EGPGV), May 5, 2013,

Book Chapters

Hank Childs, Eric Brugger, Brad Whitlock, Jeremy Meredith, Sean Ahern, David Pugmire, Kathleen Biagas, Mark Miller, Cyrus Harrison, Gunther H. Weber, Hari Krishnan, Thomas Fogal, Allen Sanderson, Christoph Garth, E. Wes Bethel, David Camp, Oliver Rubel, Marc Durant, Jean M. Favre, Paul Navratil, "VisIt: An End-User Tool For Visualizing and Analyzing Very Large Data", High Performance Visualization---Enabling Extreme-Scale Scientific Insight, ( October 2012) Pages: 357--372

Reports

Stone, D. A., H. Krishnan, R. Lance, S. Sippel, and M. F. Wehner, "The First and Second Hackathons of the International CLIVAR C20C+ Detection and Attribution Project", CLIVAR Exchanges, 2017,

Download File: StoneDA-KrishnanH-etalii-2017.pdf (pdf: 636 KB)

E. Wes Bethel, David Camp, Hank Childs, Mark Howison, Hari Krishnan, Burlen Loring, Joerg Meyer, Prabhat, Oliver Ruebel, Daniela Ushizima, Gunther Weber, "Towards Exascale: High Performance Visualization and Analytics – Project Status Report. Technical Report", DOE Exascale Research Conference, April 2012,

Posters

Burlen Loring, Suren Byna, Prabhat, Junmin Gu, Hari Krishnan, Michael Wehner, and Oliver Ruebel, "TECA an Extreme Event Detection and Climate Analysis Package for High Performance Computing", The AMS (American Meteorological Society) 96th Annual Meeting, January 6, 2016,

Harinarayan Krishnan, Burlen Loring, Suren Byna, Michael F. Wehner, Travis A. O'Brien, Prabhat, Chris Paciorek, and Daithi Stone, "Enabling End-to-End Climate Science Workflows in High Performance Computing Environments", The AMS (American Meteorological Society) 96th Annual Meeting, January 6, 2016,

Stone, D., H. Shiogama, P. Wolski, O. Angélil, S. Cholias, N. Christidis, A. Dittus, C. Folland, A. King, J. Kinter, H. Krishnan, S.-K. Min, M. Wehner, "The C20C+ Detection and Attribution Project", Fall Meeting of the American Geophysical Union, 2015,

Download File: StoneDAGU2015.pdf (pdf: 4.7 MB)

Hari Krishnan, Suren Byna, Michael Wehner, Junmin Gu, Travis O'Brien, Burlen Loring, Daithi Stone, William Collins, Prabhat, Yunjie Liu, Jeffrey Johnson, and Christopher Paciorek, "Enabling Efficient Climate Science Workflows in High Performance Computing Environments", AGU Fall Meeting, 2015, December 13, 2015,

Dáithí Stone, Michael Wehner, Shreyas Cholia, Harinarayan Krishnan, Piotr Wolski, Mark Tadross, Chris Folland, Nikos Christidis, Hideo Shiogama, "The C20C+ Detection and Attribution Project", Integrated Climate Modeling Principal Investigator Meeting 2014, 2014,

Others

DA Stone, MD Risser, OM Angélil, MF Wehner, S Cholia, N Keen, H Krishnan, TA O Brien, WD Collins, A basis set for exploration of sensitivity to prescribed ocean conditions for estimating human contributions to extreme weather in CAM5.1-1degree, Weather and Climate Extremes, Pages: 10--19 2018, doi: 10.1016/j.wace.2017.12.003

M Wehner, D Stone, H Shiogama, P Wolski, A Ciavarella, N Christidis, H Krishnan, Early 21st century anthropogenic changes in extremely hot days as simulated by the C20C+ detection and attribution multi-model ensemble, Weather and Climate Extremes, Pages: 1--8 2018, doi: 10.1016/j.wace.2018.03.001

JJ Billings, AR Bennett, J Deyton, K Gammeltoft, J Graham, D Gorin, H Krishnan, M Li, AJ McCaskey, T Patterson, R Smith, GR Watson, A Wojtowicz, The eclipse integrated computational environment, SoftwareX, Pages: 234--244 2018, doi: 10.1016/j.softx.2018.07.004

M Wehner, D Stone, D Mitchell, H Shiogama, E Fischer, LS Graff, VV Kharin, L Lierhammer, B Sanderson, H Krishnan, Changes in extremely hot days under stabilized 1.5 and 2.0 °c global warming scenarios as simulated by the HAPPI multi-model ensemble, Earth System Dynamics, Pages: 299--311 2018, doi: 10.5194/esd-9-299-2018

C Li, C Michel, L Seland Graff, I Bethke, G Zappa, TJ Bracegirdle, E Fischer, BJ Harvey, T Iversen, MP King, H Krishnan, L Lierhammer, D Mitchell, J Scinocca, H Shiogama, DA Stone, JJ Wettstein, Midlatitude atmospheric circulation responses under 1.5 and 2.0g°C warming and implications for regional impacts, Earth System Dynamics, Pages: 359--382 2018, doi: 10.5194/esd-9-359-2018

YS Yu, M Farmand, C Kim, Y Liu, CP Grey, FC Strobridge, T Tyliszczak, R Celestre, P Denes, J Joseph, H Krishnan, FRNC Maia, ALD Kilcoyne, S Marchesini, TPC Leite, T Warwick, H Padmore, J Cabana, DA Shapiro, Three-dimensional localization of nanoscale battery reactions using soft X-ray tomography, Nature Communications, 2018, doi: 10.1038/s41467-018-03401-x

DA Shapiro, R Celestre, B Enders, J Joseph, H Krishnan, MA Marcus, K Nowrouzi, H Padmore, J Park, A Warwick, Y-S Yu, The COSMIC Imaging Beamline at the Advanced Light Source: a new facility for spectro-microscopy of nano-materials, Microscopy and Microanalysis, Pages: 8--11 2018, doi: 10.1017/s1431927618012485

B Enders, K Nowrouzi, H Krishnan, S Marchesini, J Park, Y-S Yu, DA Shapiro, Dataflow at the COSMIC Beamline - Stream Processing and Supercomputing, Microscopy and Microanalysis, Pages: 58--59 2018, doi: 10.1017/s1431927618012710

BJ Daurer, H Krishnan, T Perciano, FRNC Maia, DA Shapiro, JA Sethian, S Marchesini, Nanosurveyor: a framework for real-time data processing., Advanced structural and chemical imaging, Pages: 7 2017, doi: 10.1186/s40679-017-0039-0

B Timmermans, D Stone, M Wehner, H Krishnan, Impact of tropical cyclones on modeled extreme wind-wave climate, Geophysical Research Letters, Pages: 1393--1401 2017, doi: 10.1002/2016GL071681

M Wehner, D Stone, H Krishnan, K Achutarao, F Castillo, 16. The deadly combination of heat and humidity in India and Pakistan in summer 2015, Bulletin of the American Meteorological Society, Pages: S81--S86 2016, doi: 10.1175/BAMS-D-16-0145.1

TA O Brien, WD Collins, K Kashinath, O Rübel, S Byna, J Gu, H Krishnan, PA Ullrich, Resolution dependence of precipitation statistical fidelity in hindcast simulations, Journal of Advances in Modeling Earth Systems, Pages: 976--990 2016, doi: 10.1002/2016MS000671

Yiyang Li, Sophie Meyer, Jongwoo Lim, Sang Chul Lee, William E Gent, Stefano Marchesini, Harinarayan Krishnan, Tolek Tyliszczak, David Shapiro, Arthur L David Kilcoyne, others, Electrode Lithiation: Effects of Particle Size, Electronic Connectivity, and Incoherent Nanoscale Domains on the Sequence of Lithiation in LiFePO4 Porous Electrodes (Adv. Mater. 42/2015), Advanced Materials, Pages: 6590--6590 2015,

Yiyang Li, Sophie Meyer, Jongwoo Lim, Sang Chul Lee, William E Gent, Stefano Marchesini, Harinarayan Krishnan, Tolek Tyliszczak, David Shapiro, Arthur L David Kilcoyne, others, Effects of Particle Size, Electronic Connectivity, and Incoherent Nanoscale Domains on the Sequence of Lithiation in LiFePO4 Porous Electrodes, Advanced Materials, Pages: 6591--6597 2015,

Y Li, S Meyer, J Lim, SC Lee, WE Gent, S Marchesini, H Krishnan, T Tyliszczak, D Shapiro, ALD Kilcoyne, WC Chueh, Effects of Particle Size, Electronic Connectivity, and Incoherent Nanoscale Domains on the Sequence of Lithiation in LiFePO<inf>4</inf> Porous Electrodes, Advanced Materials, Pages: 6591--6597 2015, doi: 10.1002/adma.201502276

DN Williams, T Bremer, C Doutriaux, J Patchett, S Williams, G Shipman, R Miller, DR Pugmire, B Smith, C Steed, EW Bethel, H Childs, H Krishnan, P Prabhat, M Wehner, CT Silva, E Santos, D Koop, T Ellqvist, J Poco, B Geveci, A Chaudhary, A Bauer, A Pletzer, D Kindig, GL Potter, TP Maxwell, Ultrascale visualization of climate data, Computer, Pages: 68--76 2013, doi: 10.1109/MC.2013.119

J Meyer, EW Bethel, JL Horsman, SS Hubbard, H Krishnan, A Romosan, EH Keating, L Monroe, R Strelitz, P Moore, G Taylor, B Torkian, TC Johnson, I Gorton, Visual data analysis as an integral part of environmental management, IEEE Transactions on Visualization and Computer Graphics, Pages: 2088--2094 2012, doi: 10.1109/TVCG.2012.278

TM Özgökmen, AC Poje, PF Fischer, H Childs, H Krishnan, C Garth, AC Haza, E Ryan, On multi-scale dispersion under the influence of surface mixed layer instabilities and deep flows, Ocean Modelling, Pages: 16--30 2012, doi: 10.1016/j.ocemod.2012.07.004

H Krishnan, C Garth, J Gühring, MA Gülsün, A Greiser, KI Joy, Analysis of time-dependent flow-sensitive PC-MRI data, IEEE Transactions on Visualization and Computer Graphics, Pages: 966--977 2012, doi: 10.1109/TVCG.2011.80

H Krishnan, J Meyer, A Romosan, H Childs, EW Bethel, Enabling advanced environmental management via remote and distributed visual data exploration and analysis, Computing and Visualization in Science, Pages: 123--133 2012, doi: 10.1007/s00791-013-0204-5

H Krishnan, C Garth, KI Joy, Time and streak surfaces for flow visualization in large time-varying data sets, IEEE Transactions on Visualization and Computer Graphics, Pages: 1267--1274 2009, doi: 10.1109/TVCG.2009.190

C Garth, H Krishnan, X Tricoche, T Bobach, KI Joy, Generation of accurate integral surfaces in time-dependent vector fields, IEEE Transactions on Visualization and Computer Graphics, Pages: 1404--1411 2008, doi: 10.1109/TVCG.2008.133

AR Fuller, H Krishnan, K Mahrous, B Hamann, KI Joy, Real-time procedural volumetric fire, Proceedings - I3D 2007, ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games, Pages: 175--180 2007, doi: 10.1145/1230100.1230131