Research Interests:
Parallel and Distributed Computing, Digital Preservation, Scientific Visualization, Data
Intensive Computing.
Teaching:
Biographical Sketch:
- Professor: Electrical and Computer Engineering, and Institute for Advanced
Computer Studies, 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 140 refereed publications in parallel and distributed computing, data
intensive computing, combinatorial algorithms, algebraic complexity, and VLSI architectures.
- IEEE and ACM Fellow
- more
Current Projects:
- ADAPT: An Approach to
Digital Archiving and Preservation Technology. The
ADAPT project is developing technologies for building a scalable and
reliable infrastructure for the long-term access and preservation of digital
assets. Our approach uses a distributed object architecture that operates on
different levels of abstractions built around grid technologies and web
services. A list of our recent tools and related documentation can be found
here.
-
Visual Exploration of Large Scale Multidimensional Data.
Development of efficient algorithms and methodologies that enable the visual
exploration of large scale multidimensional data (Talk-April07).
- Earth Science Information Partnership for Land
Cover. Development of novel data
products and computer science technologies in support of the NASA Earth Science
Enterprise. This project is supported through the Global Land Cover Facility
that makes available novel information services and over 13TB of data
products.
- Performance and Management of Distributed
Heterogeneous Networks. A Partnership between the University of
Maryland and the Laboratory for Telecommunications Sciences which involves a
broad research program in networking and telecommunications technologies.
- Parallel Algorithmics. Development of
techniques for designing efficient scalable algorithms for multicore
processors and clusters of these processors.
Selected Recent Publications:
- Streaming Model Based Volume
Ray Casting Implementation for Cell Broadband Engine, Jusub Kim and
Joseph JaJa, Proceedings of Eurographics Symposium on Parallel
Graphics and Visualization, 2008.
-
Fast Browsing of Archived
Web Contents, Sangchul Song and Joseph JaJa, to appear in
Proceedings of the International Web Archiving Workshop, September
18-19, 2008, Aarhus, Denmark.
-
Archiving
Temporal Web Information: Organization of Web Contents for Fast Access and
Compact Storage, Sangchul Song and Joseph JaJa, UMIACS-TR-2008-08.
-
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.
- Interactive High-Resolution Isosurface Ray
Casting on Multi-core Processors, Q. Wang and J. JaJa, IEEE
Transactions on Visualization and Computer Graphics, 2008.
- An Efficient and Scalable Parallel Algorithm for
Out-of-Core Isosurface Extraction and Rendering, Q. Wang, J.
J.JaJa, A. Varshney, Journal of Parallel and Distributed Computing,
67(5), 592-603, 2007.
- Component-based Data Layout for Efficient
Slicing of Very Large Multidimensional Volumetric Data, Jusub Kim
and Joseph JaJa, Proceedings of the 2007 International Conference on
Scientific and Statistical Database Management,
July 9-11,
2007, Banff, Canada.
- Information Aware Tree for Efficient
out-of-core Indexing of Very Large Multidimensional Volumetric Data,
Jusub Kim and Joseph JaJa, Proceedings of the 2007 International Conference
on Scientific and Statistical Database Management, July 9-11, 2007, Banff,
Canada.
- ACE: A Novel Software Platform to Ensure the
Integrity of Long Term Archives, S. Song and J. JaJa, 90-93, Proceedings of the Archiving 2007 Conference, May 2007, Washington, DC.
- New Techniques for Ensuring the Long Term
Integrity of Digital Archives, Sangchul Song and Joseph JaJa,
Proceedings of the 8th Annual International Conference on Digital
Government Research, 57-65, Philadelphia, May 20-23, 2007.
- Isosurface Extraction and Spatial Filtering Using Persistent Octree (POT),
Q. Shi and J. JaJa, IEEE Transactions on Visualization and Computer
Graphics, 12(5), September/October 2006.
-
Using
Scalable and Secure Web Technologies to Design a Global Digital Format
Registry Prototype: Architecture, Implementation, and Testing, M.
Geremew, S. Song, and J. JaJa, Archiving 2006, 92-96, May 23-26,
2006, Ottawa, Canada.
-
A Novel Information-Aware Octree for the
Visualization of Large Scale Time-Varying Data, J. Kim and J. JaJa, UMIACS-TR-2006-03, University of Maryland, College Park,
April 2006.
- Novel Transformation
Techniques Using Q-Heaps with Applications to Computational Geometry,
Q. Shi and J. JaJa, SIAM J. Computing, 34(6), 1471-1492, 2005.
-
Optimal
and Near-Optimal Algorithms for Generalized Intersection Reporting on
Pointer Machines, Q. Shi and J. JaJa, Information Processing
Letters, 95, 382-388, 2005.
-
A
New Framework for Addressing Temporal Range Queries with some Preliminary
Results, Q. Shi and J. JaJa,
Theoretical Computer Science, 332, 109-121, 2005
-
Scalable, Reliable
Marshalling and Organization of Distributed Large Scale Data Onto Enterprise
Storage Environments, J. JaJa, M. Smorul, F. McCall, and Y. Wang, Proceedings of the NASA/IEEE Conference on Mass Storage Systems and
Techniques, April 2005, Monterey, CA.
- Efficient Serial and Parallel Algorithms
for Querying Large Scale Multidimensional Time Series Data,
Joseph
JaJa ; Jusub Kim ; Qin Wang, UMIACS-TR-2004, 2004.
PAWN: Producer - Archive Workflow Network in Support of Digital
Preservation,
Mike Smorul ; Joseph JaJa ; Yang Wang ; Fritz
McCall, UMIACS-TR-2004, 2004.
- Temporal
Range Exploration of Large Scale Multidimensional Time Series Data,
J. JaJa, J. Kim, and Q. Wang, Proceedings of the 2004 International
Conference on Scientific and Statistical Database Management, 95-106,
June 2004, Santorini Island, Greece.
- Space
Efficient and Fast Algorithms for Multidimensional Dominance Reporting and
Counting, J. JaJa, C. Mortensen, and Q. Shi, Proceedings of the
2004 Annual Symposium on Algorithms and Computation, Hong Kong, December
2004.
- Recovery
of a Digital Image Collection Through the SDSC/UMD/NARA Prototype Persistent
Archive, M. Smorul, et.al., Technical Report, UMIACS-TR-2003-105,
November 2003.
- Space-Efficient
and Fast Algorithms for Multidimensional Dominance Reporting and Range
Counting,
Q. Shi, J. JaJa, and C. Morentensen,
Technical Report, UMIACS-TR-2003-101,
October 2003.
- An O(n)-Space O(log n/loglog n + f)-Query
Time Algorithm for 3-D Dominance Reporting, Q. Shi and J. JaJa,
Technical Report, UMIACS-TR-2003-77, July 2003.
- Fast Fractional Cascading and its
Applications, Q. Shi and J. JaJa, Technical Report,
UMIACS-TR-2003-71, July 2003.
- Techniques for Indexing and
Querying Temporal Observations for a Collection of Objects, Q. Shi
and J. JaJa, Technical Report, UMIACS-TR-2003-72, July 2003.
- Fast
Algorithms for 3D-Dominance Reporting and Counting, Q. Shi and J. JaJa,
Technical Report, UMIACS-TR-06, 2003.
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Last Updated: July, 2008.