I am the head of the database systems group at
the Faculty of
Computer Science of the Free University of
Bozen-Bolzano. Since October 2019, I serve as Vice-Rector for
My main research interests are in data-intensive systems with a
focus on database technologies for the processing and analysis of
data, with a particular emphasis on time-referenced and time series
data. The adopted research methodology combines fundamental
research, system development, and empirical evaluation. Research
problems originate from different application areas, e.g.,
government, tourism, health-care, agriculture.
- ISTeP: This project aims at boosting the efficiency and
scalability of the Temporal Alignment (TA) framework
(http://tpg.inf.unibz.it/), which is the first relational
implementation with comprehensive temporal query support. The research
topics include: customized temporal alignment primitives; advanced
cost estimates; equivalence rules between temporal primitives and RA
operators. The project is funded by the research grant #
I52F20000250003 (ISTeP) of Research Südtirol / Alto Adige
- Temporal RDBMS: This project aims at extending RDBMSs
with support for querying interval-timestamped data under
sequenced semantics by reducing the temporal operators to the
non-temporal counterparts. Our solution has been implemented in
the kernel of PostgreSQL.
- Temporal Data Analytics: This project aims at developing
solutions for analyzing temporal data. Specifically adressed
research problems include the efficient computation of aggregation
operators, approximate aggregations, and visual data analysis.
- Finished projects:
- A. Dignös, M.H. Böhlen, J. Gamper, C.S. Jensen,
P. Moser. Leveraging range joins for the computation of overlap
joins. VLDB Journal 2021.
- M. Shekelyan, A. Dignös, J. Gamper, M. Garofalakis. Approximating
multidimensional range counts with maximum error
guarantees. ICDE 2021.
- T. Chondrogiannis, P. Bouros, J. Gamper, U. Leser,
D.B. Blumenthal. Finding k-shortest paths with limited
overlap. VLDB Journal 2020.
- D.B. Blumenthal, N. Boria, J. Gamper, S. Bougleux, L. Brun.
Comparing heuristics for graph edit distance computation. VLDB
- A. Dignös, B. Glavic, X. Niu, J. Gamper,
M. H. Böhlen. Snapshot semantics for temporal multiset
relations. PVLDB 2019.
- M. Shekelyan, A. Dignös, J. Gamper. DigitHist: a
histogram-based data summary with tight error bounds. PVLDB
- A. Dignös, M.H. Böhlen, J. Gamper, C.S. Jensen.
Extending the kernel of a relational DBMS with comprehensive
support for sequenced temporal queries. TODS 2016.
(Selected by ACM Computing Reviews for
Annual Best of Computing — Notable Books and Articles)
- A. Dignös, M.H. Böhlen, J. Gamper. Overlap interval
partition join. SIGMOD 2014.
- A. Dignös, M.H. Böhlen, J. Gamper. Temporal alignment.
- J. Gordevicius, J. Gamper, M.H. Böhlen. Parsimonious
temporal aggregation. VLDB Journal 2012.
- N. Augsten, M. Böhlen, J. Gamper. The pq-gram
distance between ordered labeled trees. TODS 2010.
Chairs: Demo Co-chair of ICDE 2021, General Co-chair of SOFSEM
2021, General Chair of SSDBM 2018, PC Co-chair of TIME 2019, Local
Chair of TIME 2020, Workshops Co-chair of ADBIS 2019 and ADBIS 2017.
(2021, 2020, 2019, 2018 demo, 2017, 2015
demo), SIGMOD (2019
demo, 2014 demo,
(2017, 2016, 2010), EDBT (2021,
2019, 2017, 2016, 2015, 2013, 2011, 2009),
(2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012,
2011), SSDBM (2015, 2014, 2012, 2011,
(2018, 2017, 2015,
(2021, 2020, 2015, 2014, 2013, 2012, 2009, 2008).
Reviewing for journals:
Systems, DKE, AICOM,
I am a member of ACM and IEEE CS.
Teaching and Student Supervision
Current PhD students: Adam Charane, Kassem Sabeh
Former PhD students:
David B. Blumenthal,
Markus Innerebner. Co-supervision:
Nikolaus Augsten, Romans
Kasperovics, Judith Knapp.
Courses I am currently teaching:
Database Management Systems, BSc students, Summer term
Proposals for BSc/MSc theses are on the database systems