Research Interests: Data Science,
Machine Learning, Computational Neuroscience, High Performance Computing, Visualization.
2020 and 2021: ENEE 436: Foundations of Machine Learning
2019: ENEE759G: Unsupervised
2018, Spring 2019: ENEE101: Introduction to Electrical and Computer
2017, Spring 2018, and Fall 2018: ENEE244: Digital Logic Design
- Interim Chair, Department of Electrical and Computer
Engineering, University of Maryland, College Park.
- Professor: Electrical and Computer Engineering, and
Institute for Advanced Computer Studies, University of Maryland.
- 2010-2011: Interim VP and CIO, University of Maryland,
- 1994-2004: Director of the University of Maryland
Institute for Advanced Computer Studies (UMIACS)
- 2002-2004: Interim Director of the Center for
Bioinformatics and Computational Biology
- Ph.D. 1977, M.S. 1976, Applied Mathematics, Division of
Engineering and Applied Physics, Harvard University.
- Over 180 refereed publications in parallel and
distributed computing, data intensive computing, combinatorial algorithms,
algebraic complexity, and VLSI architectures.
- IEEE and ACM Fellow
- Machine Learning. This research involves a number
of efforts related to adversarial machine learning, disentangled
representation, federated learning, and techniques related to
computational neuroscience. The latter project addresses the structural
and functional organization of the brain and the characteristics of the
corresponding brain networks using DTI and fMRI data. The project involves
collaborations with a number of faculty at UMD and UMB, and is partially
funded under the Center for Health-Related Informatics and Bioimaging
(CHIB) and the Brain and Behavior Initiative (BBI).
- Parallel Computing. Development of parallel
algorithms and their implementations on current and emerging heterogeneous
multicore/GPU platforms. Applications of interest range from scientific
computing to large scale graph –theoretic problems to machine
learning algorithms for big data. A current effort involves fast
simulation and real-time simulation of Agent Based Models for vocal cord
inflammation and healing process.
- Partnership with the Laboratory for Telecommunication
This partnership involves collaborative efforts involving a broad set of
research areas and outreach activities. Current research projects cover
topics in high performance computing, networking, wireless, network
security, and geolocation.
Selected Recent Publications:
Based Label Smoothing for Confidence Calibration, C. Liu and J.
JaJa, Proceedings of the 30the
International Conference on Artificial Neural Networks
Brain Dynamics for Decoding and Predicting Individual Differences,
J. Misra, S. Surampudi,
M. Venkatesh, C. Limbachia, J. JaJa, and L.
Pessoa, accepted to PLOS
Computational Biology, 2021.
Coarsening with Preserved Spectral Properties, Y. Jin, A. Loukas,
and J. JaJa, accepted to The 23rd
International Conference on Artificial Intelligence and Statistics
Functional Connectivity Matrices: A Geometry-Aware Approach applied to
Participant Identification, M. Venkatesh, J. JaJa, and L. Pessoa, Neuroimage, vol 207, Feb 2020.
- Towards a Physiological Scale of Vocal
Fold Agent-based Models of Surgical Inquiry and Repair: Sensitivity
Analysis, Calibration and Validation, A. Garg, S. Yuen, N. Seekhao, G.
Yu, J. Karwowski, M. Powell, J. Sakata, L.
Mongeau, J. JaJa, and N. Li-Jessen, Applied
Sciences, 9(15), 2019.
- Geodesic Distances between Functional
Connectivity Matrices: a Geometry-aware Approach, M. Venkatesh, J.
JaJa, and L. Pessoa, Poster Presentation, Neuroscience 2019, October 19-23, Chicago, IL.
- Analysis and
Forecasting for Traffic Flow Data, Y. Wang and J. JaJa, Sensors and Materials, 31(6), 2143-2154, 2019.
- Feature Prioritization and
Regularization Improve Standard Accuracy and Adversarial Robustness, C. Liu and J. JaJa, to appear in Proceedings for the
International Joint Conference on Artificial Intelligence (IJCAI),
Dynamics and Temporal Trajectories during Task and Naturalistic Processing, M. Venkatesh, J. JaJa,
and L. Pessoa, Neuroimage, 2019.
- High-Performance Agent-based Modeling
Applied to Vocal Fold Inflammation and Repair, N. Seekhao, C. Shung,
J. JaJa, L. Mongeau, and N. Li-Jessen, Frontiers in Physiology, April
2018, Vol. 9.
- LEICA: Laplacian Eigenmaps for Group ICA Decomposition, C. Liu, J. JaJa, and L.
- In Situ Visualization for 3D
Agent-Based Vocal Fold Inflammation and Repair Simulation, N. Skeekhao,
J. JaJa, L. Mongeau, and N. Li-Jessen, accepted to Supercomputing Frontiers and Innovations, 2017.
- Real-time Agent-Based Modeling and Simualtion with in-situ Visualization of Complex
Biological Systems: A Case Study on Vocal Fold Inflammation and Healing, N. Seekhao, C. Shung,
J. JaJa, L. Mongeau, and N. Li, Proceedings
of the HiCOMB 2016 Workshop, May 2016,
- A High Performance Implementation of Spectral
Clustering on CPU-GPU Platforms, Y. Jin and J. JaJa, Proceedings of the Parallel Computing and Optimization (PCO 2016)
Workshop, May 2016, Chicago.
- Linking “Toxic Outliers” to Environmental
Justice Communities, M. Collins, I. Munoz, and J. JaJa, Environmental Research Letters, December 2016. Won the ERL Best Article for 2016.
- Connectivity-Based Brain
Parecellations: A Connectivity-Based Atlas for Schizophrenia Research, Q. Wang, R. Chen, J.
JaJa, Y. Jin, E. Hong, and E. Herskovits, Neuroinformatics, October 2015.
- A Data-Driven Approach to Extract
Connectivity Structures from Diffusion Tensor Imaging Data, Y. Jin, J. JaJa, R.
Chen, and E. Herskovits, Proceedings
of the 2015 IEEE International Conference on Big Data (IEEE BigData
2015), Oct 29 – Nov 1, 2015, Santa Clara, CA.
- Achieving Native GPU Performance for
Out-of-Card Large Matrix Multiplication, J. Wu and J. JaJa, Parallel Processing Letters, 2016.
- Resting State Dynamic Functional Network Analysis in
Mild Traumatic Brain Injury, W. Hou, C. Chandler, J. JaJa, and R.
Society for Magnetic Resonance in Medicine ISMRN 2015, Toronto, Ontario, May 30—31, 2015.
- Optimized FFT Computations on Heterogeneous
Platforms with Application to the Poisson Equation. J. Wu and J. JaJa, Journal of Parallel and Distributed
- From Maxout to
Channel-Out: Encoding Information on Sparse Pathways, Q. Wang and J. JaJa, Proceedings of the International
Conference on Artificial Neural Networks, 15-19 September, 2014,
- High Performance FFT Based Poisson Solver on a
CPU-GPU Heterogeneous Platform, J. Wu and J. JaJa, International
Parallel and Distributed Processing Symposium (IPDPS), May 2013,
- Hierarchical Exploration of Volumes Using
Multilevel Segmentation of the Intensity-Gradient Histograms, C. Yiu Ip, A.
Varshney, and J. JaJa, VIS 2012, October 2012 (won Best Paper Award for SciVis 2012)
- An Effective Approach to Temporally
Anchored Information Retrieval, Z. Wei and J. JaJa, UMIACS-TR-2012-10, University of
Maryland, College Park, August, 2012.
- Optimized Strategies for Mapping Three-dimensional
FFTs onto CUDA GPUs, J. Wu and J. JaJa, Proceedings of Innovative
Parallel Computing (INPAR) Workshop, San Jose, CA, May
- Constructing Inverted Files: To MapReduce or Not Revisited, Z. Wei and J. JaJa,
Technical Report, University of Maryland, College Park, 2011. Also, to
appear in IEEE Transactions on
Parallel and Distributed Computing.
- A Fast Algorithm for
Constructing Inverted Files on Heterogeneous Platforms, Z. Wei and J. JaJa, International
Parallel and Distributed Processing Symposium (IPDPS), May 2011,
- Optimization of
Linked List Prefix Computations on Multithreaded GPUs Using CUDA, Z Wei and J. JaJa, International
Parallel and Distributed Processing Symposium (IPDPS), April 2010,
- Streaming Based
Volume Ray Casting on the Cell Broadband Engine, J. Kim and
J. JaJa, Scientific Programming, Special Issue on High-Performance
Computing on the Cell BE, 17(number 1-2), 173-184, 2009.
- Techniques to Audit and
Certify the Long Term Integrity of Digital Archives, S. Song and J. JaJa, International
Journal of Digital Libraries, 2010.
- Quantifying the
astrocytoma cell response to candidate pharmaceutical from F-ACTIN image
Chi Cui, Joseph JaJa, Thomas Turbyville, John
Beutler, Prabhakar Gudla, Kaustav Nandy and Stephen Lockett, EMBC2009,
- Interactive Direct
Volume Rendering on Desktop Multicore Processors, Q. Wang and J. JaJa, Concurrency
and Computation: Practice and Experience, 21, 2199-2212, September
- Robust Tools and Services
for Long-Term Preservation of Digital Information, J. JaJa and S. Song, Library
Trends Special Issue: Library of Congress National Digital Information and
Preservation Parntership, 57:3, 580-594,
- Search and Access
Strategies for Web Archives, S Song and J. JaJa, Proceedings of Archiving 2009,
May 4-7, 2009.
Model Based Volume Ray Casting Implementation for Cell Broadband Engine,
Kim and Joseph JaJa, Proceedings of Eurographics
Symposium on Parallel Graphics and Visualization, 2008.
Browsing of Archived Web Contents, Sangchul Song and Joseph JaJa, Proceedings of the
International Web Archiving Workshop, September 18-19, 2008, Aarhus,
- Parallel Algorithms
for Volumetric Surface Construction, J. JaJa, Q. Shi, and A. Varshney, a chapter in Parallel
Computing: Models, Algorithms, and Applications, S. Rajasekaran and J.
Reif, eds., Chapman & Hall/CRC, 2008.
High-Resolution Isosurface Ray Casting on
Multi-core Processors, Q. Wang and J. JaJa, IEEE Transactions on
Visualization and Computer Graphics, 2008.
Last Updated: December, 2017.