Ph.D. 1985 Computer Science Department, Aarhus
University Computer Sci.
M.S. 1980 Computer Science Department, Aarhus
Associate Professor Coll. of Computing, Georgia Tech
1992 - present
Current fields of interest
Visiting Professor Inst. for Elec. Systems, Aalborg
Univ. Jan - June 1997
Assistant Professor Computer Sci. Dept., Univ. of
Maryland 1986 - 1992
Database system architecture, data models, database design. Metadata
management, data dictionary systems, information interchange. Rulebases,
transaction dependencies. Efficient query processing, differential compu-
tation models. Transaction time databases. Database generator systems,
software engineering databases, engineering information systems. Information interchange. XML and XML Schema.
Selected Journal Papers:
Roussopoulos, N. and Mark, L., "Schema Manipulation in Self-Describing
and Self-Documenting Data Models," International Journal of Computer and
Information Sciences, vol. 14, no.1, 1985, pp. 1-28.
Mark, L. and Roussopoulos, N., "Metadata Management," IEEE Computer
Magazine, vol. 19, no. 12, December 1986, pp. 26-36.
Mark, L., "Defining Views in the Binary Relationship Model," Information
Systems, Volume 12, no. 3, 1987, pp. 281-294.
Sellis, T., Roussopoulos, N., Mark, L., and Faloutsos, C., "Expert
Database Systems: Efficient Support for Engineering Environments," Data
and Knowledge Engineering, no. 3, 1988, pp. 71-85.
Harhalakis, G., Mark, L., Johri, A., and Cochrane, B., "A Working Prototype
MRP II/CAD System," Computer Integrated Manufacturing Review, vol. 5, no. 1,
1988, pp. 14-24.
Harhalakis, G., Lin, C.P., and Mark, L., "A Knowledge-Based Prototype of a
Factory-Level CIM System," Journal of Computer Integrated Manufacturing
Systems, vol. 2, no. 1, 1989, pp. 11-20.
Mark, L., "A Graphical Query Language for the Binary Relationship
Model," Information Systems, Volume 14, no. 3, 1989, pp. 231-246.
Lin, C-C., Mark, L., Sellis, T. and Faloutsos, C., "Performance Issues in
the Binary Relationship Model," Data and Knowledge Engineering, 4, September
1989, pp. 195-221.
Mark, L. and Roussopoulos, N., "Information Interchange Between Self-
Describing Databases," Information Systems, Volume 15, no. 4, 1990, pp.
Litwin, W., Mark, L., and Roussopoulos, N., "Interoperability of Multiple
Autonomous Databases," ACM Computing Surveys, Volume 22, Number 3, September
1990, pp. 267-293. Also published in Japanese in a special issue entitled
"Computer Science 90" of BIT, Kyoritsu Shuppan Co.
Roussopoulos, N., Mark, L., Sellis, T., Faloutsos, C.), "An Architecture
for High Performance Engineering Information Systems," IEEE Transactions on
Software Engineering, Volume 17, number 1, January 1991, pp. 22-33.
Jensen, C. and Mark, L., "Queries on Change in an Extended Relational
Model," IEEE Transactions on Knowledge and Data Engineering, Volume 4, number
2, April 1992, pp. 192-200.
Jensen, C., Mark, L., and Roussopoulos, N., "Incremental Implementation
Model for Relational Databases with Transaction Time," IEEE Transactions on
Knowledge and Data Engineering, Volume 3, number 4, December 1991,
Harhalakis, G., Lin, C.P., Mark, L., and Muro, P.R., "Information Systems
for Integrated Manufacturing (INSIM) - A Design Methodology," International
Journal of Computer Integrated Manufacturing; Volume 4, Number 6, Nov-Dec
Mark, L. and Cochrane, B., "Grammars and Relations," IEEE Transactions on
Software Engineering; Vol. 18, No. 9, September 1992, pp. 840-849.
Jensen, C., Mark, L., Roussopoulos, N., and Sellis, T., "Using
Differential Techniques to Efficiently Support Transaction Time" VLDB
Journal; 2(1), 1992, pp. 75-111.
Mark, L., Roussopoulos, N., Newsome, T. and Laohapipattana, P.,
"Incrementally Maintained Network -> Relational Database Mapping,"
Software Practice & Experience; Vol 22(12), December 1992, 1099-1131.
Harhalakis, G., Lin, C.P., Mark, L., and Muro-Medrano, P.R.,
"Implementation of Rule Based Information Systems for Integrated
Manufactur-ing," IEEE Transactions on Knowledge and Data Engineering Vol. 6,
No.6, December 1994.
Harhalakis, G., Lin, C.P., Mark, L. and Muro-Medrano, P.R., "Structured
Representation of Rule Based Specifications in CIM using Updated Petri Nets,"
IEEE Transactions on Systems, Man, and Cybernetics; Vol. 25, No. 1, January
Baekgaard, L. and Mark, L., "Incremental Computation of Time-Varying
Queries," IEEE Transactions on Knowledge and Data Engineering; Volume 7,
number 4, August 1995.
Baekgaard, L. and Mark, L., "Incremental Evaluation of Set Differences,"
IEEE Transactions on Knowledge and Data Engineering; vol. 9, no. 2,
Baekgaard, L. and Mark, L., "Incremental Computation of Nested Relational
Query Expressions," ACM Transactions on Database Systems; vol. 20, no. 2,
June 1995, pp. 111-148.
Torp, k., Mark, L., and Jensen, C.S., "Efficient Differential
Timeslice Computation," IEEE Transactions on Knowledge and Data,
Engineering; Vol. 10, no. 4, July-August 1998. pp 599-612.
Collins, S., Navathe, S. and Mark, L., "XML Schema Mappings for
Heterogeneous Database Access," Information and Software Technology, Special
Issue on Objects, , and Databases. Elsevier (to appear).
Skyt, J., Jensen, C.S., Mark, L., "A Foundation for Vacuuming Temporal
Databases, Data and Knowledge Engineering. (to appear).
Selected Research Grants:
1988 - 1991
High Performance Engineering Information Systems.
PI: N. Roussopoulos. Co-PIs: C. Faloutsos, L. Mark,
T. Sellis. National Science Foundation. $400,000.
1989 - 1992
Design Issues for High Performance Engineering Infor-
mation Systems. PI: N. Roussopoulos. Co-PIs: C.
Faloutsos, L. Mark, T. Sellis. Airforce Office of
Scientific Research. $428,000.
1990 - 1992
Computer Integrated Manufacturing. Co-PIs: George
Harhalakis, Leo Mark, Dana Nau, Guangming Zhang.
Systems Research Center, University of Maryland.
1993 - 1994
Transitioning to the Open Systems Environment. PIs:
M. Eidbo, M. Ammar, L. Mark, M. McCracken, S.B. Na-
vathe, S. Rugaber. Army Research Lab. $455,000.
1993 - 1994
Distributed Database Technology. PIs: S.A. Vipond,
M. Ammar, L. Mark, S.B. Navathe, , A. Vandenberg.
SUN Equipment Grant. $41,590.
Consolidation of the TSQL2 Language. PI: Jensen,
C.S.; Co-PIs: Snodgrass, R.T., and Mark, L.; Danish
Nat. Sci. Res. Council, Project No. 11-1089-1 SE.
1994 - 1995
Information Interchange Protocol - Message Parsing.
PIs: J. Coleman (GTRI), L. Mark. ARPA through Army
Research Lab, $750,000.
1996 - 1997
Advance Message Processing Feasibility Study. PIs:
J. Coleman (GTRI), L. Mark. Army Research Lab,
1996 - 1997
High Level Architecture Testing, Phase II. PI: L.
Mark. Army , $14,800
1997 - 1998
High Level Architecture (HLA) Data Engineering
Technical Support. PIs: L. Mark & T. McLean (GTRI).
Defense Modeling and Simulation Office, Army, $230,000.
1997 - 1998
Travel support. Visiting Professor, Aalborg University.
PI: L. Mark. Statens Naturvidenskabelige Forskningsraad
(NSF in Denmark), DKr. 55,000.
1998 - 2003
Oplaeg til Nykredit Center for Databaseforskning.
[Proposal for a Nykredit Center for Database Research].
PI: C. Jensen (Authors of the proposal were C. Jensen,
L. Mark, and L. Mathiassen). Nykredit, Denmark Dkr. 5,000,000
($800,000). Substantial additional support expected.
Georgia Tech benefits through faculty and student
1999 - 2000
Focused Reserach Program (FRP) in Integrated Simulation
Systems. PIs: CoC: Ammar, Fujimoto, Hodgins, Mark, Schwan;
GTRI: Cassinovi, Loper, McLean; AE: Schrage, Prasad, Sarathy;
ISyE: Alexopoulos, Andradottir, Goldsman, Pritchett.
Georgia Tech, $30,000
Cool links etc.
XML Graphical Query language