Dr. Theodoros Chondrogiannis

Theodoros studied computer science in his home country of Greece. He obtained his 4-year BSc degree in Computer Science and Technology with a focus on Software Systems from the Department of Computer Science and Technology of the University of Peloponnese in 2009, and his MSc degree in Advanced Information Systems from Department of Informatics and Telecommunications of the National Kapodistrian University of Athens in 2013.

In 2013, Theodoros was awarded a PhD fellowship from the Free University of Bozen-Bolzano and he started his PhD at the Faculty of Computer Science. In 2017, he completed successfully his PhD studies and received a doctorate for his thesis entitled Efficient Algorithms for Route Planning Problems on Road Networks. After his doctorate, he continued working as a postdoctolar researcher at the Faculty of Computer Science until December 2017, when he joined the University of Konstanz.

Theodoros joined the Database and Information Systems group of the University of Konstanz on December 2017.

Areas of Interest

Route Planning
Path Query Processing
Graph Query Optimization
Multi-modal Transportation Network Analysis
Trajectory Data management and Analysis

Selected Publications

Mehmet Aytimur, Silvan Reiner, Leonard Wörteler, Theodoros Chondrogiannis, Michael Grossniklaus. LPLM: A neural language model for cardinality estimation of like-queries. Proc. of the ACM on Management of Data, 2024 (to appear).
Theodoros Chondrogiannis, Michael Grossniklaus. Highway systems: How good are they, really? SSTD 2023 paper
Leonard Wörteler, Moritz Renftle, Theodoros Chondrogiannis, Michael Grossniklaus. Cardinality Estimation using Label Probability Propagation for Subgraph Matching in Property Graph Databases. EDBT 2022 paper.
Christian Häcker, Panagiotis Bouros, Theodoros Chondrogiannis, Ernst Althaus. Most Diverse Near-Shortest Paths. ACM SIGSPATIAL GIS 2021 paper
Manuel Hotz, Theodoros Chondrogiannis, Leonard Wörteler, Michael Grossniklaus. Online Landmark-Based Batch Processing of Shortest Path Queries. SSDBM 2021 paper
Theodoros Chondrogiannis, Panagiotis Bouros, Johann Gamper, Ulf Leser, David B. Blumenthal, Finding k-shortest paths with limited overlap, The VLDB Journal 2020 paper source
Camila F. Costa, Theodoros Chondrogiannis, Mario A. Nascimento, Panagiotis Bouros: RRAMEN: An Interactive Tool for Evaluating Choices and Changes in Transportation Networks. EDBT 2020: 599-602 paper video source
Dimitris Sacharidis, Panagiotis Bouros, Theodoros Chondrogiannis. Finding the most preferred path. ACM SIGSPATIAL GIS 2017. paper
Ttheodoros Chondrogiannis, Johann Gamper. Pardisp: A partition-based framework for distance and shortest path queries on road networks. In IEEE Int. Conf. on Mobile Data Management, IEEE MDM 2016. paper source

Service

Organisation

Publicity chair of the 18th International Symposium on Spatial and Temporal Databases (SSTD'23), 2023
Co-chair of the 5th ACM SIGSPATIAL Student Research Competition, 2020
Co-chair of the 4th ACM SIGSPATIAL Student Research Competition, 2019
Web-chair of the 16th International Symposium on Spatial and Temporal Databases (SSTD'19), 2019
Web-chair of the 30th International Conference on Scientific and Statistical Database Management (SSDBM'18), 2018

Programme Committees

31st ACM International Conference on Information and Knowledge Management (CIKM'22), 2022
23rd International Conference on Web Information Systems Engineering (WISE'22), 2022
27th International Conference on Database Systems for Advanced Applications (DASFAA'22), 2022
22nd International Conference on Web Information Systems Engineering (WISE'21), 2021
26th International Conference on Database Systems for Advanced Applications (DASFAA'21), 2021
21st IEEE International Conference on Mobile Data Management - Demo Track (MDM'20), 2020
25th International Conference on Database Systems for Advanced Applications (DASFAA'20), 2020
21st International Conference on Web Information Systems Engineering (WISE'20), 2020