SELECTED RECENT PUBLICATIONS

M. Hadjieleftheriou, G. Kollios, P. Bakalov and V.J. Tsotras: Complex Spatio-Temporal Pattern Queries,
Proc. of the 31st VLDB Conf., Trondheim, Norway, August 2005.

M. Moro, Z. Vagena, V.J. Tsotras: Tree-Pattern Queries on a Light-weight XML Processor,
Proc. of the 31st VLDB Conf., Trondheim, Norway, August 2005.

P. Mandawat, V.J. Tsotras: Indexing Schemes for Efficient Aggregate Computation over Structural Joins,
Proc. WebDB, 2005.

P. Bakalov, M. Hadjieleftheriou, E. Keogh, V.J. Tsotras: Efficient Trajectory Joins
using Symbolic Representations, Proc. MDM 2005.

M. Hadjieleftheriou, G. Kollios, V.J. Tsotras, D. Gunopulos: Indexing Spatio-temporal Archives,
VLDB Journal, to appear.

S.-Y. Chien, V.J. Tsotras, C. Zaniolo and D. Zhang: Supporting Complex Queries
on Multiversion XML Documents, ACM Trans. on Internet Technology (TOIT), to appear.

G. Kollios, D. Papadopoulos, D. Gunopulos, V.J. Tsotras: Indexing mobile objects
using dual transformations, VLDB Journal, Vol 14, No.2, pp 238-256, April 2005. dual.ps

D. Zhang, V.J. Tsotras: Optimizing Spatial Min/Max Aggregations,
VLDB Journal, Vol 14, No.2, pp 170-181, April 2005. optminmax.ps

D. Gunopulos, G. Kollios, V.J. Tsotras, and C. Domeniconi: Selectivity Estimators
for Multi-Dimensional Range Queries over Real Attributes, VLDB Journal, Vol 14, No.2,
pp 137-154, April 2005. estimation.ps

Z. Vagena, M. Moro and V.J. Tsotras: Twig Query Processing over Graph-Structured XML Data,
Proc. WebDB'04. graphxml.ps

M. Hadjieleftheriou, V. Kriakov, Y. Tao, G. Kollios, A. Delis, and V.J. Tsotras: Spatio-Temporal
Data Services in a Shared-Nothing Environment, Proc. SSDBM'04. pmvrt.ps

M. Hadjieleftheriou, E. Hoel, and V.J. Tsotras: SaIL: A Library for Efficient Application
Integration of Spatial Indices, Proc. SSDBM'04. sail.ps

Z. Vagena, M. Moro and V.J. Tsotras: Efficient Processing of XML Containment Queries
using Partition-Based Schemes, Proc. IDEAS'04. containment.ps

Z. Vagena, M. Moro and V.J. Tsotras: Supporting Branched Versions on XML Documents,
Proc. RIDE'04. branchedxml.ps

M. Hadjieleftheriou, G. Kollios, D. Gunopulos, and V.J. Tsotras: On-Line Discovery
of Dense Areas in Spatio-temporal Databases, Proc. SSTD'03. density.ps

M. Hadjieleftheriou, G. Kollios, and V.J. Tsotras: Performance Evaluation of Spatio-
temporal Selectivity Estimation Techniques, Proc. SSDBM'03. spselect.ps

Z. Vagena and V.J. Tsotras: Path-expression Queries over Multiversion XML
Documents, Proc. WebDB'03, pp 49-54. webdb03.ps

D. Zhang, D. Gunopulos, V.J. Tsotras and B. Seeger: Temporal and Spatio-Temporal
Aggregations over Data Streams using Multiple Time Granularities,
Information Systems Journal,Vol. 28, No. 1-2, March - April 2003. streams.ps

S-Y. Chien, V.J. Tsotras, C. Zaniolo: Efficient Schemes for Managing
Multiversion XML Documents. VLDB Journal, Vol. 11, No.4, pp 332-353 (2002). fullversions.ps

G. Kollios, V.J. Tsotras: Hashing Methods for Temporal Data.
IEEE Transactions on Knowledge and Data Engineering, Vol.14, No.4,
pp. 902-919, July/August 2002. hashing.ps

S.-Y. Chien, Z. Vagena, D. Zhang, V. J. Tsotras, and C. Zaniolo:
Efficient Structural Joins on Indexed XML Documents.
Proc. VLDB'02, Hong Kong, China, 2002. structural.ps

D. Zhang, V.J. Tsotras and D. Gunopulos: Efficient Aggregation
over Objects with Extent. Proc. PODS'02,
Madison, Wisconsin, June 2002. functaggr.ps

D. Zhang, V.J. Tsotras: Index Based Processing of Semi-Restrictive
Temporal Joins. Proc. TIME'02,
Manchester, UK, July 2002. time02.ps

D. Zhang, D. Gunopulos, V.J. Tsotras and B. Seeger: Temporal Aggregation
over Data Streams using Multiple Granularities. Proc. EDBT'02,
Prague, Czech Republic, March 2002. tempstreams.ps

M. Hadjieleftheriou, G. Kollios, V.J. Tsotras, D. Gunopulos: Efficient
Indexing of Spatiotemporal Objects. Proc. EDBT'02,
Prague, Czech Republic, March 2002. spatempgen.ps

S.-Y. Chien, V.J. Tsotras, C. Zaniolo and D. Zhang: Efficient Complex Query
Support for Multiversion XML Documents. Proc. EDBT'02,
Prague, Czech Republic, March 2002. dnn.ps

D. Zhang, V.J. Tsotras, B. Seeger: Efficient Temporal Join Processing using Indices.
Proc. ICDE'02, San Jose, CA, Feb.-March 2002. tempjoin.ps

D. Zhang, V.J. Tsotras: Improving Min/Max Aggregation over Spatial Objects.
Proc. ACM GIS'01, Atlanta, GA, Nov. 9-10, 2001. minmax.ps

S-Y. Chien, V.J. Tsotras, C. Zaniolo: Efficient Management of
Multiversion Documents by Object Referencing.
Proc. VLDB'01, Roma, Italy, Sept. 2001. referencing.ps

D. Zhang, A. Markowetz, V.J. Tsotras, D. Gunopulos, B. Seeger:
Efficient Computation of Temporal Aggregates with Range Predicates.
Proc. 2001 ACM SIGACT-SIGMOD-SIGART Symposium on Principles
of Database Systems (PODS), Santa Barbara, CA, May 2001. aggregates.ps

S-Y. Chien, V.J. Tsotras, C. Zaniolo: Copy-Based versus
Edit-Based Version Management Schemes for Structured Documents.
Proc. Research Issues in Data Engineering (RIDE 2001),
Heidelberg, Germany, April 2001. copy-edit.ps

G. Kollios, V.J. Tsotras, D. Gunopulos, A. Delis, M. Hadjieleftheriou:
Indexing Animated Objects Using Spatiotemporal Access Methods.
IEEE Transactions on Knowledge and Data Engineering, Sept/Oct 2001,
Vol.13, No.5, pp 758-777. spatiotemporal.ps

S-Y. Chien, V.J. Tsotras, C. Zaniolo: Version Management
of XML Documents. WebDB 2000 Workshop, Dallas, TX. xml.ps

D. Gunopulos, G. Kollios, V.J. Tsotras, C. Domeniconi: Approximating
Multi-dimensional aggregate range queries over real attributes.
Proc. 2000 ACM SIGMOD Conference, Dallas, TX. real.ps

G. Kollios, D. Gunopulos, V.J. Tsotras: On Indexing Mobile Objects.
Proc. 1999 ACM SIGACT-SIGMOD-SIGART Symposium on Principles
of Database Systems (PODS), Philadephia, PA. mobile.ps

B. Salzberg, V.J. Tsotras: A Comparison of Access Methods for Temporal
Data. ACM Computing Surveys, Vol. 31, No. 2, June 1999. survey.ps

A. Kumar, V.J. Tsotras, C. Faloutsos: Designing Access Methods for
Bitemporal Data bases. IEEE Transactions on Knowledge and
Data Engineering, 10(1): 1-21 (1998) bitemporal.ps

C.J. Su, L. Tassiulas, V.J. Tsotras: Broadcast Scheduling for Information Distribution.
ACM/Baltzer Journal of Wireless Networks 5(2): 137-147 (1999) wireless.ps