Vitus J. Leung

Discrete Math & Optimization

Author profile picture

Discrete Math & Optimization

vjleung@sandia.gov

Vitus J Leung

(505) 844-1896

Sandia National Laboratories, New Mexico
P.O. Box 5800
Albuquerque, NM 87185-1327

Biography

Research Interests:

  • On-line Algorithms
  • Computational Complexity
  • Analysis of Algorithms
  • Graph Theory
  • Combinatorics

Publications

Burak Aksar, Efe Sencan, Benjamin Schwaller, Omar Raad Aaziz, Brian Kulis, Ayse K. Coskun, Vitus J. Leung, James M. Brandt, (2022). ALBADross: Active Learning Based Anomaly Diagnosis for Production HPC Systems Cluster 2022 Document ID: 1584815

Vitus J. Leung, (2022). Concise ML Explanations Nsard Document ID: 1504604

Vitus J. Leung, (2022). Concise ML Explanations Nsard Document ID: 1504609

Yijia Zhang, Burak Aksar, Omar Raad Aaziz, Benjamin Schwaller, James M. Brandt, Vitus J. Leung, Manuel Egele, Ayse K. Coskun, (2021). Using Monitoring Data to Improve HPC Performance via Network-Data-Driven Allocation Ieee Hpec Document ID: 1368013

Yijia Zhang, Burak Aksar, Omar Raad Aaziz, Benjamin Schwaller, James M. Brandt, Vitus J. Leung, Manuel Egele, Ayse K. Coskun, (2021). Using Monitoring Data to Improve HPC Performance via Network-Data-Driven Allocation Ieee Hpec Document ID: 1355542

Burak Aksar, Yijia Zhang, Emre Ates, Omar Raad Aaziz, Benjamin Schwaller, James M. Brandt, Vitus J. Leung, Manuel Egele, Ayse K. Coskun, (2021). E2EWatch: End-to-end Anomaly Diagnosis Framework for Production HPC Systems Euro-Par 2021 Document ID: 1355630

William Eugene Hart, Vitus J. Leung, (2021). Strategies for Matching Process Models to Observational Data 89th MORS Symposium https://www.osti.gov/search/identifier:1876708 Document ID: 1318913

Burak Aksar, Yijia Zhang, Emre Ates, Omar Raad Aaziz, Benjamin Schwaller, James M. Brandt, Vitus J. Leung, Manuel Egele, Ayse K. Coskun, (2021). E2EWatch: End-to-end Anomaly Diagnosis Framework for Production HPC Systems Euro-Par 2021 https://www.osti.gov/search/identifier:1873069 Document ID: 1318850

Emre Ates, Burak Aksar, Ayse K. Coskun, Vitus J. Leung, (2021). CoMTE: Counterfactual Explanations for Multivariate Time Series ICAPAI 2021 International Conference on Applied Artificial Intelligence https://www.osti.gov/search/identifier:1866905 Document ID: 1305705

Burak Aksar, Yijia Zhang, Emre Ates, Benjamin Schwaller, Omar Raad Aaziz, Vitus J. Leung, James M. Brandt, Manuel Egele, Ayse K. Coskun, (2021). Proctor: A Semi-Supervised Performance Anomaly Diagnosis Framework for Production HPC Systems ISC High Performance https://www.osti.gov/search/identifier:1866057 Document ID: 1293964

Emre Ates, Burak Aksar, Vitus J. Leung, Ayse K. Coskun, (2021). Counterfactual Explanations for Multivariate Time Series ICAPAI 2021 International Conference on Applied Artificial Intelligence https://www.osti.gov/search/identifier:1864134 Document ID: 1293446

Emre Ates, Burak Aksar, Vitus J. Leung, Ayse K. Coskun, (2020). Explainable Machine Learning Frameworks for Managing HPC Systems MLCS 2020 at SC 2020 https://www.osti.gov/search/identifier:1829224 Document ID: 1209459

Emre Ates, Burak Aksar, Vitus J. Leung, Ayse K. Coskun, (2020). Explainable Machine Learning Frameworks for Managing HPC Systems 2nd workshop on Machine Learning for Computing Systems https://www.osti.gov/search/identifier:1830968 Document ID: 1208819

Benjamin Schwaller, Burak Aksar, Omar Raad Aaziz, Emre Ates, James M. Brandt, Ayse Coskun, Manuel Egele, Vitus J. Leung, (2019). A Machine Learning Approach to Understanding HPC Application Performance Variation Supercomputing Conference https://www.osti.gov/search/identifier:1642784 Document ID: 1033186

Burak Aksar, Benjamin Schwaller, Omar Raad Aaziz, Emre Ates, James M. Brandt, Ayse Coskun, Manuel Egele, Vitus J. Leung, (2019). AD for Machine Learning Approach to Understanding HPC Application Performance Variation Poster Supercomputing Conference https://www.osti.gov/search/identifier:1642788 Document ID: 1033202

Craig Michael Vineyard, Sam Green, Kevin Pedretti, Andrew J Younge, Vitus J. Leung, (2019). Machine Learning for System Software ? Can Computers Manage Computers? Sandia Machine Learning Deep Learning https://www.osti.gov/search/identifier:1645723 Document ID: 997843

Emre Ates, Ozan Tuncer, Ata Turk, Vitus J. Leung, James M. Brandt, Manuel Egele, Ayse K. Coskun, (2019). Taxonomist: Application Detection through Rich Monitoring Data Machine Learning Course https://www.osti.gov/search/identifier:1645517 Document ID: 974236

Yijia Zhang, Ozan Tuncer, Fulya Kaplan, Katzalin Olcoz, Vitus J. Leung, Ayse K. Coskun, (2019). Level-Spread: A New Job Allocation Policy for Dragonfly Networks Padal https://www.osti.gov/search/identifier:1641012 Document ID: 984569

Hamilton E. Link, Samuel N. Richter, Vitus J. Leung, Randolph Brost, Cynthia Ann Phillips, Andrea Staid, (2018). Statistical Models of Dengue Fever AusDM 2018The 16th Australasian Data Mining Conference https://www.osti.gov/search/identifier:1575150 Document ID: 889744

Hamilton E. Link, Samuel N. Richter, Vitus J. Leung, Randolph Brost, Cynthia Ann Phillips, Andrea Staid, (2018). Statistical Models of Dengue Fever The 16th Australasian Data Mining Conference (AusDM 2018) https://www.osti.gov/search/identifier:1593591 Document ID: 877694

Randolph Brost, Erin E. Carrier, Michelle Carroll, Katrina M. Groth, William Philip Kegelmeyer, Vitus J. Leung, Hamilton E. Link, Andrew John Patterson, Cynthia Ann Phillips, Samuel Richter, David G. Robinson, Andrea Staid, Diane M.-K. Woodbridge, (2018). Adverse Event Prediction Using Graph-Augmented Temporal Analysis: Final Report https://www.osti.gov/search/identifier:1530166 Document ID: 865580

Ozan Tuncer, Emre Ates, Yijia Zhang, Ata Turk, James M. Brandt, Vitus J. Leung, Manuel Egele, Ayse K. Coskun, (2018). Online Diagnosis of Performance Variation in HPC Systems Using Machine Learning IEEE Transactions on Parallel and Distributed Systems https://www.osti.gov/search/identifier:1474092 Document ID: 853291

Emre Ates, Ozan Tuncer, Ata Turk, Vitus J. Leung, James M. Brandt, Manuel Egele, Ayse K. Coskun, (2018). Taxonimist: Application Detection through Rich Monitoring Data Euro-Par https://www.osti.gov/search/identifier:1526818 Document ID: 807824

Yijia Zhang, Ozan Tuncer, Fulya Kaplan, Katzalin Olcoz, Vitus J. Leung, Ayse K. Coskun, (2018). Level-Spread: A New Job Allocation Policy for Dragonfly Networks IPDPS – IEEE International Parallel & Distributed Processing Symposium https://www.osti.gov/search/identifier:1499224 Document ID: 761380

Randolph Brost, Vitus J. Leung, Hamilton E. Link, Cynthia Ann Phillips, Andrea Staid, (2018). Event Prediction Using Graph-Augmented Temporal Analysis CoDA 2018Conference on Data Analytics https://www.osti.gov/search/identifier:1498238 Document ID: 761436

Ozan Tuncer, Emre Ates, Yijia Zhang, Ata Turk, James M. Brandt, Vitus J. Leung, Manuel Egele, Ayse K. Coskun, (2018). Detection and Diagnosis of Performance Variations Potential discussion with Susan Seestrom on AI/ML https://www.osti.gov/search/identifier:1497230 Document ID: 761049

Randolph Brost, Vitus J. Leung, Hamilton E. Link, Cynthia Ann Phillips, Andrea Staid, (2018). Event Prediction Using Graph-Augmented Temporal Analysis CoDA 2018Conference on Data Analytics Document ID: 750158

Ron A. Oldfield, Vitus J. Leung, Warren Leon Davis, Craig Michael Vineyard, (2018). Machine Learning for High-Performance Computing at Sandia Applied Computer Science Technical Exchange Meeting Document ID: 760505

Craig Michael Vineyard, Sam Green, Vitus J. Leung, Kevin Pedretti, Andrew J Younge, (2017). Reinforcement Learning is Needed for Extreme Heterogeneity in Supercomputing The Extreme Heterogeneity Workshop Document ID: 727300

Ozan Tuncer, Emre Ates, Yijia Zhang, Ata Turk, James M. Brandt, Vitus J. Leung, Manuel Egele, Ayse Coskun, (2017). Diagnosing Performance Variations in HPC Applications Using Machine Learning Csss https://www.osti.gov/search/identifier:1510194 Document ID: 703643

Karen D. Devine, James M. Brandt, Mehmet Deveci, Ann C. Gentile, Vitus J. Leung, Stephen Lecler Olivier, Kevin Pedretti, Sivasankaran Rajamanickam, Mark Alan Taylor, (2017). Task Placement to Reduce Application Communication Costs Sandia CIS External Review Board https://www.osti.gov/search/identifier:1467790 Document ID: 659427

Randolph Brost, Vitus J. Leung, Hamilton E. Link, Cynthia Ann Phillips, Andrea Staid, (2017). Adverse Event Prediction Using Graph-Augmented Temporal Analysis CIS External Review Board Meeting https://www.osti.gov/search/identifier:1876734 Document ID: 659648

Ozan Tuncer, Yijia Zhang, Vitus J. Leung, Ayse K. Coskun, (2017). Task Mapping on a Dragonfly Supercomputer IEEE High Performance Extreme Computing https://www.osti.gov/search/identifier:1464688 Document ID: 659132

Vitus J. Leung, (2017). Beyond BUS-PASS Meeting with NERSC https://www.osti.gov/search/identifier:1462616 Document ID: 658722

Fulya Kaplan, Ozan Tuncer, Vitus J. Leung, Karl Scott Hemmert, Ayse K. Coskun, (2017). Unveiling the Interplay Between Global Link Arrangements and Network Management Algorithms on Dragonfly Networks Padal 2017 https://www.osti.gov/search/identifier:1462608 Document ID: 638591

Didem Unat, Anshu Dubey, Torsten Hoefler, John Shalf, Mark Abraham, Mauro Bianco, Bradford L. Chamberlain, Romain Cledat, Harold C. Edwards, Hal Finkel, Karl Fuerlinger, Frank Hannig, Emmanuel Jeannot, Amir Kamil, Jeff Keasler, Paul H J Kelly Kelly, Vitus J. Leung, Hatem Ltaief, Naoya Maruyama, Chris J. Newborn, Miquel Pericas, (2017). Trends in Data Locality Abstractions for HPC Systems IEEE Transactions on Parallel and Distributed Systems https://www.osti.gov/search/identifier:1356837 Document ID: 612652

Ozan Tuncer, Emre Ates, Yijia Zhang, Ata Turk, James M. Brandt, Vitus J. Leung, Manuel Egele, Ayse K. Coskun, (2017). Diagnosing Performance Variations in HPC Architectures Using Machine Learning Isc Hpc 2017 https://www.osti.gov/search/identifier:1429161 Document ID: 610695

Fulya Kaplan, Ozan Tuncer, Vitus J. Leung, Karl Scott Hemmert, AyseK. Coskun, (2017). Unveiling the Interplay Between Global Link Arrangements and Network Management Algorithms on Dragonfly Networks CCGrid 2017 https://www.osti.gov/search/identifier:1458272 Document ID: 579020

James A. Ang, Richard Frederick Barrett, Robert E. Benner, Daniel Burke, Cy Chan, Jeanine Cook, Christopher Daley, Dave Donofrio, Simon David Hammond, Karl Scott Hemmert, Robert J. Hoekstra, Khaled Ibrahim, Suzanne M. Kelly, Hoang Le, Vitus J. Leung, George Michelogiannakis, David Richard Resnick, Arun F. Rodrigues, John Shalf, Dylan Stark, D. Unat, Nick Wright, Gwendolyn Renae Voskuilen, (2016). Abstract Machine Models and Proxy Architectures for Exascale Computing https://www.osti.gov/search/identifier:1561498 Document ID: 464734

Mehmet Deveci, Karen D. Devine, Erik Gunnar Boman, Vitus J. Leung, Sivasankaran Rajamanickam, Mark Alan Taylor, (2016). Partitioning and Task Placement with Zoltan2 SIAM Parallel Processing Conference https://www.osti.gov/search/identifier:1530505 Document ID: 431315

Emily Hastings, David Rincon-Cruz, Marc Spehlmann, Sofia Meyers, Anda Xu, David P Bunde, Vitus J. Leung, (2016). Comparing global link arrangements for Dragonfly networks SIAM Conference on Parallel Processing for Scientific Computing https://www.osti.gov/search/identifier:1364871 Document ID: 430675

Emily Hastings, David Rincon-Cruz, Marc Spehlmann, Sofia Meyers, Anda Xu, David Bunde, Vitus J. Leung, (2016). Comparing global link arrangements for Dragonfly networks New Challenges in Scheduling Theory https://www.osti.gov/search/identifier:1347475 Document ID: 419743

Emily Hastings, David Rincon-Cruz, Marc Spehlmann, Sofia Meyers, Anda Xu, David P Bunde, Vitus J. Leung, (2016). Comparing global link arrangements for Dragonfly networks Boston University Computer Engineering Seminar https://www.osti.gov/search/identifier:1514371 Document ID: 397764

Vitus J. Leung, David Bunde, Emily Hastings, Sofia Meyers, David Rincon-Cruz, Marc Spehlmann, Anda Xu, (2015). Comparing global link arrangements for Dragonfly networks FASTMath all-hands meeting https://www.osti.gov/search/identifier:1327866 Document ID: 342303

Evan Balzuweit, David P Bunde, Vitus J. Leung, Austin Finley, Alan C.S. Lee, (2015). Local search to improve coordinate-based task mapping Parallel Computing https://www.osti.gov/search/identifier:1238587 Document ID: 342057

Emily Hastings, David Rincon-Cruz, Marc Spehlmann, Sofia Meyers, Anda Xu, David P. Bunde, Vitus J. Leung, (2015). Comparing global link arrangements for Dragonfly networks Lawrence University Computer Science Seminar https://www.osti.gov/search/identifier:1326570 Document ID: 321651

Emily Hastings, David Rincon-Cruz, Marc Spehlmann, Sofia Meyers, Anda Xu, David Bunde, Vitus J. Leung, (2015). Comparing global link arrangements for Dragonfly networks CSSS talk https://www.osti.gov/search/identifier:1506764 Document ID: 321484

Mehmet Deveci, Karen D. Devine, Vitus J. Leung, Andrey V Prokopenko, Sivasankaran Rajamanickam, (2015). Architecture-aware Task Placement DOE SciDAC PI Meeting https://www.osti.gov/search/identifier:1324418 Document ID: 307943

Emily Hastings, David Rincon-Cruz, Marc Spehlmann, Sofia Meyers, Anda Xu, David P. Bunde, Vitus J. Leung, (2015). Comparing global link arrangements for Dragonfly networks Cluster 2015 https://www.osti.gov/search/identifier:1581691 Document ID: 319357

Ozan Tuncer, Vitus J. Leung, Ayse K. Coskun, (2015). PaCMap: Topology Mapping of Unstructured Communication Patterns onto Non-contiguous Allocations Programming abstractions for data locality https://www.osti.gov/search/identifier:1257694 Document ID: 286862

Vitus J. Leung, Manuel Egele, Ayse K. Coskun, (2015). M&Ms: Measure and Manage Exascale-System Behavior for Security and Integrity ASCR Cybersecurity for Scientific Computing Integrity Workshop Document ID: 275462

Ozan Tuncer, Vitus J. Leung, Ayse K. Coskun, (2015). PaCMap: Topology Mapping of Unstructured Communication Patterns onto Non-contiguous Allocations 29th International Conference on Supercomputing (ICS 2015) https://www.osti.gov/search/identifier:1249042 Document ID: 264554

Karen D. Devine, Erik Gunnar Boman, Sivasankaran Rajamanickam, Vitus J. Leung, Lee Ann Riesen, Mehmet Deveci, Umit Catalyurek, (2015). The Zoltan2 Toolkit: Partitioning, Task Placement, Coloring, and Ordering SIAM Conf on Computational Science and Engineering https://www.osti.gov/search/identifier:1331661 Document ID: 232784

Evan Balzuweit, David P. Bunde, Vitus J. Leung, Austin Finley, Alan C. S. Lee, (2015). Local Search to Improve Task Mapping Siam Cse https://www.osti.gov/search/identifier:1245915 Document ID: 232796

Manuel Egele, Ayse Coskun, Vitus J. Leung, (2014). Rapid Detection of Malicious Behavior in Exascale Systems DOE ASCR Cybersecurity Workshop Document ID: 219194

Adrian Tate, Amir Kamil, Anshu Dubey, Armin Groblinger, Brad Chamberlain, Brice Goglin, Harold C. Edwards, Chris J Newburn, David Padua, Didem Unat, Emmanuel Jeannot, Frank Hannig, Gysi Tobias, Hatem Ltaief, James Sexton, Jesus Labarta, John Shalf, Karl Fuerlinger, Kathryn O’Brien, Leonidas Linardakis, Maciej Besta, Marie-Christine Sawley, Mark Abraham, Mauro Bianco, Miquel Pericas, Naoya Maruyama, Paul Kelly, Peter Messmer, Robert B. Ross, Romain Ciedat, Satoshi Matsuoka, Thomas Schulthess, Torsten Hoefler, Vitus J. Leung, (2014). Programming Abstractions for Data Locality https://www.osti.gov/search/identifier:1172915 Document ID: 208330

James M. Brandt, Karen D. Devine, Ann C. Gentile, Vitus J. Leung, Stephen Lecler Olivier, Kevin Pedretti, Sivasankaran Rajamanickam, David P. Bunde, Mehmet Deveci, Umit V. Catalyurek, (2014). Using architecture information and real-time resource state to reduce power consumption and communication costs in parallel applications https://www.osti.gov/search/identifier:1158537 Document ID: 155388

Ozan Tuncer, Vitus J. Leung, Ayse K. Coskun, (2014). Topology Mapping for Unstructured Communication Patterns 20th ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming https://www.osti.gov/search/identifier:1319762 Document ID: 155501

Evan Balzuweit, David P. Bunde, Vitus J. Leung, Austin Finley, Alan C. S. Lee, (2014). Local search to improve task mapping P2s2 https://www.osti.gov/search/identifier:1502734 Document ID: 154932

James A. Ang, Richard Frederick Barrett, Robert E. Benner, D. Burke, C. Chan, D. Donofrio, Simon David Hammond, Karl Scott Hemmert, Suzanne M. Kelly, H. Le, Vitus J. Leung, David Richard Resnick, Arun F. Rodrigues, J. Shalf, Dylan Stark, D. Unat, N. J. Wright, (2014). Abstract Machine Models and Proxy Architectures for Exascale Computing Rev 1.1 Co-HPC 2014 https://www.osti.gov/search/identifier:1314528 Document ID: 155334

Karen D. Devine, Gerrett Diamond, Dan Ibanez, Vitus J. Leung, Andrey V Prokopenko, Sivasankaran Rajamanickam, Mark Shephard, Cameron Smith, (2014). FASTMath Partitioning and Task Placement https://www.osti.gov/search/identifier:1494434 Document ID: 143005

Dwayne L. Knirk, Vitus J. Leung, Cynthia Ann Phillips, Ali Pinar, David G. Robinson, Tanya Berger-Wolf, Sanjukta Bhowmick, Emily Casleton, Mark Kaiser, Daniel J. Nordman, Alyson G. Wilson, (2014). Statistically Significant Relational Data Mining: LDRD Report https://www.osti.gov/search/identifier:1204082 Document ID: 5332643

Sivasankaran Rajamanickam, Vitus J. Leung, Kevin Pedretti, Stephen Lecler Olivier, Karen D. Devine, Mehmet Deveci, David Bunde, Umit Catalyurek, (2013). Exploiting Geometric Partitioning in Task Mapping for Parallel Computers Ipdps14 https://www.osti.gov/search/identifier:1115106 Document ID: 5329425

Karen D. Devine, Erik Gunnar Boman, Sivasankaran Rajamanickam, Vitus J. Leung, (2013). The Zoltan Toolkits: Parallel Partitioning, Load Balancing, Coloring and OrderingColoring and Ordering Presentation to visitors from Chevron https://www.osti.gov/search/identifier:1673208 Document ID: 5327640

Vitus J. Leung, (2013). Vertex Types N/a https://www.osti.gov/search/identifier:1664741 Document ID: 5325604

Vitus J. Leung, Robert Ivan Yorgason, (2013). Uniting Dissimilar Hex Meshes to Achieve a Many-to-Many Swept Topology 22nd International Meshing Roundtable https://www.osti.gov/search/identifier:1106708 Document ID: 5325958

Vitus J. Leung, (2013). Local Mesh Modification N/a https://www.osti.gov/search/identifier:1666195 Document ID: 5325007

Vitus J. Leung, (2013). Id-less Journal Files N/a https://www.osti.gov/search/identifier:1666162 Document ID: 5324745

Vitus J. Leung, (2013). Removing Small Features with Real CAD Operations 16th International Meshing Roundtable https://www.osti.gov/search/identifier:1141654 Document ID: 5252867

Erik Gunnar Boman, Karen D. Devine, Vitus J. Leung, Sivasankaran Rajamanickam, Lee Ann Riesen, Mehmet Deveci, Umit Catalyurek, (2012). Zoltan2: Next-Generation Combinatorial Toolkit Trilinos Users Group Meeting https://www.osti.gov/search/identifier:1062842 Document ID: 5315121

Vitus J. Leung, (2012). Parallel Mesh Refinement to CAD Geometry 21st International Meshing Roundtable https://www.osti.gov/search/identifier:1061087 Document ID: 5313540

Karen D. Devine, Vitus J. Leung, Sivasankaran Rajamanickam, Onkar Sahni, Mark Shephard, Cameron Smith, (2012). Data Partitioning for Scientific Applications and Emerging Architectures SciDAC Principal Investigators Meeting https://www.osti.gov/search/identifier:1116382 Document ID: 5312589

A. M. Lindsay, M. Galloway-Carson, C. R. Johnson, David P. Bunde, Vitus J. Leung, (2012). Backfilling with guarantees made as jobs arrive Concurrency and Computation Practice and Experience https://www.osti.gov/search/identifier:1067728 Document ID: 5307597

Claire C. Ralph, Vitus J. Leung, William C. McLendon, (2012). Brief Announcement: Subgraph Isomorphism on a Multithreaded Shared Memory Architecture Spaa https://www.osti.gov/search/identifier:1067656 Document ID: 5307616

David R. Bronowski, Keren Bergman, David Bunde, Elliot Cooper-Balis, Kurt Brian Ferreira, Karl Scott Hemmert, Brian Barrett, Cassandra Versaggi, Robert Hendry, Bruce Jacob, Hyesoon Kim, Vitus J. Leung, Michael J. Levenhagen, Mitchelle Rasquinha, Rolf Riesen, Paul Rosenfeld, Maria del Carmen Ruiz Varela, Sudhakar Yalamanchili, (2012). Improvements to the Structural Simulation Toolkit SIMUTools 2012 https://www.osti.gov/search/identifier:1117760 Document ID: 5305668

David R. Bronowski, Keren Bergman, David Bunde, Elliot Cooper-Balis, Kurt Brian Ferreira, Karl Scott Hemmert, Brian Barrett, Cassandra Versaggi, Robert Hendry, Bruce Jacob, Hyesoon Kim, Vitus J. Leung, Michael J. Levenhagen, Mitchelle Rasquinha, Rolf Riesen, Paul Rosenfeld, Maria del Carmen Ruiz Varela, Sudhakar Yalamanchili, (2012). Improvements to the Structural Simulation Toolkit SIMUTools 2012 https://www.osti.gov/search/identifier:1068327 Document ID: 5305276

Brian Barrett, Richard Frederick Barrett, James M. Brandt, Ronald B. Brightwell, Matthew Leon Curry, Nathan D. Fabian, Kurt Brian Ferreira, Ann C. Gentile, Karl Scott Hemmert, Suzanne M. Kelly, Ruth Ann Klundt, James H. Laros, Vitus J. Leung, Michael J. Levenhagen, Gerald Fredrick Lofstead, Kenneth D. Moreland, Ron A. Oldfield, Kevin Pedretti, Arun F. Rodrigues, David Thompson, Harry Lee Ward, John P. Vandyke, Courtenay T. Vaughan, Kyle Bruce Wheeler, Tom Tucker, (2012). Report of Experiments and Evidence for ASC L2 Milestone 4467 – Demonstration of a Legacy Applications Path to Exascale https://www.osti.gov/search/identifier:1039013 Document ID: 5305233

Brian Barrett, Richard Frederick Barrett, James M. Brandt, Ronald B. Brightwell, Matthew Leon Curry, Nathan D. Fabian, Kurt Brian Ferreira, Ann C. Gentile, Karl Scott Hemmert, Suzanne M. Kelly, Ruth Ann Klundt, James H. Laros, Vitus J. Leung, Michael J. Levenhagen, Gerald Fredrick Lofstead, Kenneth D. Moreland, Ron A. Oldfield, Kevin Pedretti, Arun F. Rodrigues, David Thompson, Harry Lee Ward, John P. Vandyke, Courtenay T. Vaughan, Kyle Bruce Wheeler, Tom Tucker, (2012). Demonstration of a Legacy Applications Path to Exascale – ASC L2 Milestone 4467 Presentation to L2 Milestone Review Panel https://www.osti.gov/search/identifier:1688616 Document ID: 5305236

Mohamed Salah Ebeida, Scott A. Mitchell, Patrick Knupp, Vitus J. Leung, (2012). Conforming Voronoi Meshing Based on Maximal Poisson Sampling Femtec 2011 https://www.osti.gov/search/identifier:1106284 Document ID: 5294713

Vitus J. Leung, (2011). CUBIT External Review 20th International Meshing Roundtable https://www.osti.gov/search/identifier:1118551 Document ID: 5300876

Vitus J. Leung, William Roshan Quadros, Byron Hanks, Corey Ernst, (2011). Assembly Clean-up/Defeaturing 20th International Meshing Roundtabld https://www.osti.gov/search/identifier:1106337 Document ID: 5300548

Vitus J. Leung, Edward L. Hoffman, Ernest Joseph Friedman-Hill, Randy Morris, Karl Merkley, (2011). Cubit/DART Workbench Integration 20th International Meshing Roundtable https://www.osti.gov/search/identifier:1106211 Document ID: 5300549

Stefan P. Feer, Zachary D. Rhodes, Nickolas W. Price, David P. Bunde, Vitus J. Leung, (2011). Task Mapping for Noncontiguous Allocations Ipdps https://www.osti.gov/search/identifier:1118485 Document ID: 5300320

Sivasankaran Rajamanickam, Erik Gunnar Boman, Karen D. Devine, Vitus J. Leung, Lee Ann Riesen, Umit Catalyurek, Doruk Bozdag, Cedric Chevalier, Michael Wolf, (2011). Tutorial: The Zoltan Toolkit DOE ACTS Workshop https://www.osti.gov/search/identifier:1143440 Document ID: 5298166

Mohamed Salah Ebeida, Scott A. Mitchell, Vitus J. Leung, Joseph E. Bishop, Mario J. Martinez, (2011). Mesh Generation for Modeling and Simulation of Carbon Sequestration Process SciDAC 2011 https://www.osti.gov/search/identifier:1107220 Document ID: 5296566

Mohamed Salah Ebeida, Patrick Knupp, Scott A. Mitchell, Vitus J. Leung, (2011). Conforming Voronoi Meshing for three dimensional domains with multiple cracks 8th Symposium on Trends in Unstructed Mesh Generation https://www.osti.gov/search/identifier:1120637 Document ID: 5291878

Vitus J. Leung, (2011). Removing Small Features with Real CAD Operations 16th International Meshing Roundtable https://www.osti.gov/search/identifier:1142158 Document ID: 5256434

Mohamed Salah Ebeida, Patrick Knupp, Vitus J. Leung, (2011). Mesh Generation of Modeling and Simulation of Carbon Sequestration Processes SIAM conference on Computational Science Engineering (CSE11) https://www.osti.gov/search/identifier:1109334 Document ID: 5291885

Vitus J. Leung, (2010). CUBIT External Review 19th International Meshing Roundtable https://www.osti.gov/search/identifier:1027055 Document ID: 5287442

Vitus J. Leung, (2010). Gsfm 2010 Ground Shock in Faulted Media Workshop https://www.osti.gov/search/identifier:984111 Document ID: 5278774

Brian Barrett, Bruce A. Hendrickson, Randall A. Laviolette, Vitus J. Leung, Greg Edward Mackey, Richard C. Murphy, Cynthia Ann Phillips, Ali Pinar, Brad Mancke, Kyle Wheeler, (2009). LDRD Final Report: Massive Multithreading Applied to National Infrastrucure and Informatics https://www.osti.gov/search/identifier:993883 Document ID: 5276101

Karen D. Devine, Vitus J. Leung, L. Diachin, J. Kraftcheck, K. E. Jansen, X. Luo, M. Miller, C. Ollivier-Gooch, A. Ovcharenko, O. Sahni, M. S. Shephard, T. Tautges, T. Xie, M. Zhou, (2009). Interoperable Mesh Components for Large-Scale, Distributed-Memory Simulations SciDAC 2009 https://www.osti.gov/search/identifier:958377 Document ID: 5272625

Vitus J. Leung, (2009). CUBIT External Review 2008 17th International Meshing Roundtable https://www.osti.gov/search/identifier:950662 Document ID: 5266220

Vitus J. Leung, Byron Hanks, Corey Ernst, (2008). Conformal Assembly Meshing with Tolerant Imprinting 17th International Meshing Roundtable https://www.osti.gov/search/identifier:1142462 Document ID: 5266152

Karen D. Devine, Erik Gunnar Boman, Cedric Chevalier, Vitus J. Leung, Lee Ann Riesen, Umit Catalyurek, Doruk Bozdag, (2008). Tutorial: The Zoltan Toolkit ACTS Workshop https://www.osti.gov/search/identifier:948337 Document ID: 5265067

Vitus J. Leung, (2008). Methods for Preparing Geometry for Mesh Generation Inaugural International Conference of the Engineering Mechanics Institute https://www.osti.gov/search/identifier:1145535 Document ID: 5262189

Dwayne L. Knirk, Robert D. Carr, William Eugene Hart, Vitus J. Leung, Cynthia Ann Phillips, Jean-Paul Watson, (2008). Designing Contamination Warning System for Municipal Water Networks Using Imperfect Sensors Journal of Water Resources Planning and Management https://www.osti.gov/search/identifier:1146387 Document ID: 5259250

Randall A. Laviolette, Bruce A. Hendrickson, Vitus J. Leung, Cynthia Ann Phillips, (2007). Community Detection vis Facility Location Phycisal Review Letters https://www.osti.gov/search/identifier:1146883 Document ID: 5256727

Vitus J. Leung, (2007). Metrics and Geometry 16th International Meshing Roundtable https://www.osti.gov/search/identifier:1146601 Document ID: 5256566

Erik Gunnar Boman, Vitus J. Leung, Lee Ann Riesen, Umit V Catalyurek, (2007). Dynamic Load Balancing and Partitioning using the Zoltan Toolkit Workshop on Libraries and Algorithms for Petascale Applications https://www.osti.gov/search/identifier:1147186 Document ID: 5254435

William Eugene Hart, Jonathan W. Berry, Jean-Paul Watson, Robert D. Carr, Cynthia Ann Phillips, Vitus J. Leung, (2006). On the Placement of Imperfect Sensors in Municipal Water Networks 8th Annual Water Distribution System Analysis Symposium https://www.osti.gov/search/identifier:1264620 Document ID: 5243234

George A Samara, Vitus J. Leung, (2002). Probabilistic Analysis for Scheduling with Conflicts Theoretical Computer Science https://www.osti.gov/search/identifier:1264620 Document ID: 4391700

George A Samara, Vitus J. Leung, (2001). Scheduling with Conflicts on Bipartite and Interval Graphs Journal of Scheduling https://www.osti.gov/search/identifier:1264620 Document ID: 4047100

Walter R. Witkowski, Joseph Jung, Clark R. Dohrmann, Vitus J. Leung, (2000). Finite Element Meshing Approached as a Global Minimization Process https://www.osti.gov/search/identifier:1264620 Document ID: 3474800

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Awards & Recognition

2018

Vitus J. Leung, Primary Program Committee, IPDPS, October 3, 2018

2017

Vitus J. Leung, SBIR/STTR Programs Review Panel, The Office of Advanced scientific computing in the Office of Science at the US Department of Energy, December 13, 2017

Vitus J. Leung, Member of the Program Committee, COLOC Workshop, March 14, 2017

Vitus J. Leung, Poster Committee Member, The 26th International Symposium on High Performance Distributed Computing (HPDC), April 24, 2017

Vitus J. Leung, Unveiling the Interplay Between Global Link Arrangements and Network Management Algorithms on Dragonfly Networks, Fourth Workshop on Programming Abstractions for Data Locality (PADAL), August 3, 2017

Vitus J. Leung, External referee for a PhD thesis, Grenoble Institute of Technology, July 19, 2017

Ozan Tuncer, Emre Ates, Boston University, Yijia Zhang, Boston University, Ata Turk, Boston University, James M Brandt, Vitus J Leung, Manuel Egele, Boston University, Ayse K Coskun, Boston University, Gauss Award, German Gauss Center for Supercomputing, This award is assigned to the most outstanding paper in the field of scalable supercomputing accepted to ISC HPC, June 19, 2017

2016

Vitus J. Leung, Technical Program Committee, 5th International Conference on Advances in Computing, Communications, and Informatics, January 4, 2016

Vitus J. Leung, PhD Thesis Committee, Boston University, February 11, 2016

2014

Michael Bender, David Bunde, Knox College, Vitus J. Leung, Samuel McCauley, Stony Brook University, Cynthia A. Phillips, "Efficient scheduling to minimize calibrations", Workshop on New Challenges in Scheduling Theory, April 3, 2014

Vitus J. Leung, Simulation and Optimization of HPC Job Allocation for Jointly Reducing Communication and Cooling Costs, Knox College, May 14, 2014

Vitus J. Leung, Task Mapping Stencil Computations for Non-Contiguous Allocations, Workshop on New Challenges in Scheduling Theory, April 2, 2014

Vitus J. Leung, Zoltan2: Exploiting Geometric Partitioning in Task Mapping for Parallel Computers, PADAL Workshop 2014, April 29, 2014

2013

Vitus J. Leung, Outside Examiner, Knox College, May 14, 2013

Vitus J. Leung, Session Organizer, INFORMS Annual Meeting, August 12, 2013

Vitus J. Leung, Task mapping for non-contiguous allocations, Boston University CISE, May 20, 2013

2012

Vitus J. Leung, Backfilling with guarantees granted upon job submission, New Challenges in Scheduling Theory, October 25, 2012

Vitus J. Leung, Subgraph isomorphism in a multithreaded shared memory architecture, Knox College Computer Science Department, September 19, 2012

2011

Vitus J. Leung, Minisymposium Organizer, SIAM Conference on Parallel Processing for Scientific Computing, October 16, 2011

2010

Vitus J. Leung, Randall A Laviolette, DOE, Braess-Like Paradox on a Bipartite Exchange Network: More Connections are Not Always Better, New Challenges in Scheduling Theory, September 12, 2010

Vitus J. Leung, Parallel Job Scheduling Policies to Improve Fairness: A Case Study, Knox College Department of Computer Science, November 2, 2010

2009

Vitus J. Leung, Braess-like paradoxes on a bipartite exchange network: More connections are not always better, INFORMS Annual Meeting, October 11, 2009

Vitus J. Leung, Breakout group co-leader, NSF Workshop on the Science of Power Management, April 7, 2009

Vitus J. Leung, Senior Member, ACM, May 7, 2009

Vitus J. Leung, Small Data Centers and Grid Computing Panel, National Science Foundation, April 15, 2009

2008

Vitus J. Leung, Program Committee, ACM Symposium on Parallelism in Algorithms and Architectures, December 1, 2008

Vitus J. Leung, New Experimental Results in Communication-Aware Processor Allocation for Supercomputers, New Challenges in Scheduling Theory, May 12, 2008

2007

Vitus J. Leung, Reviewer, Journal of Parallel and Distributed Computing, September 10, 2007

2006

Vitus J. Leung, Michael A Bender, Stony Brook University, David P Bunde, University of Illinois, Urbana-Champaign, Kevin T Pedretti, Cynthia A Phillips, Compute Process Allocator (CPA), R&D 100, October 19, 2006

Vitus J. Leung, Early Career Principal Investigator Panel, Department of Energy, March 29, 2006

Vitus J. Leung, Fairness of Job Scheduling in Cplant, Scheduling Algorithms for New Emerging Applications, May 29, 2006

2010

Bob Ballance, Bob Benner, Courtenay Vaughan, Cynthia Phillips, Gerald Quinlan, Sandia (retired), James H Laros, Jim Tomkins, Sandia (retired), John VanDyke, Keith Underwood, Intel, Kevin Pedretti, Lee Ann Riesen, Lee Ward, Len Stans, Sandia (retired), Linda Bonnefoy-Lev, Michael Levenhagen, Patricia Brown, Paul Iwanchuk, LANL, Rolf Riesen, Ruth Klundt, Suzanne Kelly, Trammell Hudson, Contractor, Vitus Leung, William J. Camp, Sandia (retired), Vitus J. Leung, Excellence in Technology Transfer, Federal Laboratory Consortium, Red Storm Massively Parallel Processor, April 29, 2010