Joseph JaJa

3214 Iribe Center
(301) 405-6722
Ph.D., Harvard University
Special Awards/Honors: 
ACM Fellow, IEEE Fellow

Joseph JaJa is a professor and interim chair of the Department of Electrical and Computer Engineering.

His current research interests are in high performance computing, long-term management and preservation of digital information, and large scale data management, analysis, and visualization.

JaJa is the director of cyberinfrastructure at the National Socio-Environmental Synthesis Center. He also serves in a leadership role in a federally funded research and development center (FFRDC) solely dedicated to enhancing cybersecurity and protecting national information systems.

JaJa has also received numerous awards including the IEEE Fellow Award in 1996, the 1997 R&D Award for the development software for tuning parallel programs, the ACM Fellow Award in 2000, and the Internet2 IDEA Award in 2006. He has served on several editorial boards, and is a subject area editor for the Journal of Parallel and Distributed Computing and as an editor for the International Journal of Foundations of Computer Science.

JaJa received his doctorate in applied mathematics from Harvard University, and has since published extensively in a number of areas including parallel and distributed computing, theoretical computer science, circuits and systems, and data-intensive computing.

Go here to view JaJa's academic publications.



Wei Z, JaJa JF.  2012.  An Optimized High-Throughput Strategy for Constructing Inverted Files. Parallel and Distributed Systems, IEEE Transactions on. PP(99):1-1.


Wei Z, JaJa JF.  2011.  A Fast Algorithm for Constructing Inverted Files on Heterogeneous Platforms. Parallel Distributed Processing Symposium (IPDPS), 2011 IEEE International.

Prasad SK, Chtchelkanova A, Das S, Dehne F, Gouda M, Gupta A, JaJa JF, Kant K, La Salle A, LeBlanc R et al..  2011.  NSF/IEEE-TCPP curriculum initiative on parallel and distributed computing: core topics for undergraduates. Proceedings of the 42nd ACM technical symposium on Computer science education.


Smorul M, Song S, JaJa JF.  2010.  Monitoring distributed collections using the Audit Control Environment (ACE). Proceedings of the 2010 Roadmap for Digital Preservation Interoperability Framework Workshop.

Wei Z, JaJa JF.  2010.  Optimization of linked list prefix computations on multithreaded GPUs using CUDA. Parallel Distributed Processing (IPDPS), 2010 IEEE International Symposium on.


Song S, JaJa JF.  2009.  Techniques to audit and certify the long-term integrity of digital archives. International Journal on Digital Libraries. 10(2):123-131.

Smorul M, Song S, JaJa JF.  2009.  An Implementation of the Audit Control Environment (ACE) to Support the Long Term Integrity of Digital Archives. Proceedings of DigCCurr2009 Digital Curation: Practice, Promise and Prospects.

Song S, JaJa JF.  2009.  Search and Access Strategies for Web Archives. Proceedings of IS&T Archiving 2009.

Wang Q, JaJa JF.  2009.  Interactive direct volume rendering on desktop multicore processors. Concurrency and Computation: Practice and Experience. 21(17):2199-2212.

JaJa JF, Smorul M, Song S.  2009.  Tools and Services for Long-Term Preservation of Digital Archives. Indo-US Workshop on International Trends in Digital Preservation.


Song S, JaJa JF.  2008.  Fast browsing of archived Web contents. 8th International Web Archiving Workshop, Aarhus, Denmark..

Remote D U, Kalluri S, Bader DA, Townshend J, JaJa JF, Zhang Z, Fallah-adl H.  2008.  High Performance Computing Algorithms for Land Cover.

Wang Q, JaJa JF.  2008.  Interactive High-Resolution Isosurface Ray Casting on Multicore Processors. Visualization and Computer Graphics, IEEE Transactions on. 14(3):603-614.


Kim J, JaJa JF.  2007.  Information-Aware 2^ n-Tree for Efficient Out-of-Core Indexing of Very Large Multidimensional Volumetric Data. Scientific and Statistical Database Management, 2007. SSBDM'07. 19th International Conference on.

Song S, JaJa JF.  2007.  New techniques for ensuring the long term integrity of digital archives. Proceedings of the 8th annual international conference on Digital government research.

Kim J, JaJa JF.  2007.  Component-based Data Layout for Efficient Slicing of Very Large Multidimensional Volumetric Data. Scientific and Statistical Database Management, 2007. SSBDM '07. 19th International Conference on.


JaJa JF.  2006.  Robust technologies for automated ingestion and long-term preservation of digital information. Proceedings of the 2006 international conference on Digital government research.

Shi Q, JaJa JF.  2006.  Isosurface Extraction and Spatial Filtering using Persistent Octree (POT). Visualization and Computer Graphics, IEEE Transactions on. 12(5):1283-1290.

Snelick R, JaJa JF, Kacker R, Lyon G.  2006.  Synthetic‐perturbation techniques for screening shared memory programs. Software: Practice and Experience. 24(8):679-701.


Moore RW, JaJa JF, Chadduck R.  2005.  Mitigating risk of data loss in preservation environments. Mass Storage Systems and Technologies, 2005. Proceedings. 22nd IEEE / 13th NASA Goddard Conference on.


Patil GP, Balbus J, Biging G, JaJa JF, Myers WL, Taillie C.  2004.  Multiscale advanced raster map analysis system: definition, design and development. Environmental and Ecological Statistics. 11(2):113-138.

JaJa JF.  2004.  Strategies for exploring large scale data. Parallel Architectures, Algorithms and Networks, 2004. Proceedings. 7th International Symposium on.


Smorul M, JaJa JF, McCall F, Brown S F, Moore R, Marciano R, Chen S-Y, Lopez R, Chadduck R.  2003.  Recovery of a Digital Image Collection Through the SDSC/UMD/NARA Prototype Persistent Archive. UMIACS-TR-2003-105

Shi Q, JaJa JF.  2003.  Fast algorithms for a class of temporal range queries. Algorithms and Data Structures.


Shi Q, JaJa JF.  2002.  Efficient techniques for range search queries on earth science data. Scientific and Statistical Database Management, 2002. Proceedings. 14th International Conference on.


Kalluri SNV, JaJa JF, Bader DA, Zhang Z, Townshend JRG, Fallah-Adl H.  2000.  High performance computing algorithms for land cover dynamics using remote sensing data. International Journal of Remote Sensing. 21(6-7):1513-1536.

Rodrıguez-Martinez M, Roussopoulos N, McGann JM, Keyley S, Katz V, Song Z, JaJa JF.  2000.  MOCHA: a database middleware system featuring automatic deployment of application-specific functionality. Proceedings of the 2000 ACM SIGMOD International Conference on Management of Data, Dallas, Texas.

Mareboyana M, Srivastava S, JaJa JF.  2000.  Web based progressive transmission for browsing remotely sensed imagery. Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International. 2:591-593vol.2-591-593vol.2.

Zhang Z, JaJa JF, Bader DA, Kalluri SNV, Song H, El Saleous N, Vermote E, Townshend JRG.  2000.  Kronos: A software system for the processing and retrieval of large-scale AVHRR data sets. PE & RS- Photogrammetric Engineering and Remote Sensing. 66(9):1073-1082.

JaJa JF.  2000.  A perspective on Quicksort. Computing in Science Engineering. 2(1):43-49.


Helman D, JaJa JF.  1999.  Designing practical efficient algorithms for symmetric multiprocessors. Algorithm Engineering and Experimentation.

Helman DR, JaJa JF.  1999.  Prefix computations on symmetric multiprocessors. Parallel and Distributed Processing, 1999. 13th International and 10th Symposium on Parallel and Distributed Processing, 1999. 1999 IPPS/SPDP. Proceedings.

Lindsay FE, Townshend JRG, JaJa JF, Humphries J, Plaisant C, Shneiderman B.  1999.  Developing the next generation of Earth science data systems: the Global Land Cover Facility. Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International. 1:616-618vol.1-616-618vol.1.

Kalluri SNV, Zhang Z, JaJa JF, Bader DA, Song H, El Saleous N, Vermote E, Townshend JRG.  1999.  A hierarchical data archiving and processing system to generate custom tailored products from AVHRR data. Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International. 5:2374-2376vol.5-2374-2376vol.5.


Helman DR, Bader DA, JaJa JF.  1998.  A Randomized Parallel Sorting Algorithm with an Experimental Study. Journal of Parallel and Distributed Computing. 52(1):1-23.

Zhang Z, Kalluri SNV, JaJa JF, Liang S, Townshend JRG.  1998.  Models and high-performance algorithms for global BRDF retrieval. Computational Science Engineering, IEEE. 5(4):16-29.

Helman DR, JaJa JF, Bader DA.  1998.  A new deterministic parallel sorting algorithm with an experimental evaluation. Journal of Experimental Algorithmics (JEA). 3


Dubayah R, Blair JB, Bufton JL, Clark DB, JaJa JF, Knox R, Luthcke SB, Prince S, Weishampel J.  1997.  The vegetation canopy lidar mission. Proceedings of Land Satellite Information in the Next Decade, II: Sources and Applications. Bethesda (MD): American Society of Photogrammetry and Remote Sensing.


Bader DA, JaJa JF.  1996.  Practical parallel algorithms for dynamic data redistribution, median finding, and selection. Parallel Processing Symposium, 1996., Proceedings of IPPS '96, The 10th International.