Johann Gamper
Free University of Bozen-Bolzano
Faculty of Computer Science
Dominikanerplatz 3, Room 2.15, 39100 Bozen-Bolzano, Italy
email: gamper at inf dot unibz dot it
phone: +39-0471-016140

I am full professor and 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 Research. 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.

Research Projects

  • Temporal RDBMS: Aims at extending RDBMs with support for querying interval-timestamped data under sequenced semantics. The basic idea is to reduce the temporal operators to the non-temporal counterparts. Our solution is implemented in the kernel of PostgreSQL. [more]
  • DASA: Aims at developing solutions for managing/analysing time series data coming from weather stations in agriculture. Specific research problems include the imputation of missing values and the search for similar time series or episodes, e.g., seek the most similar Summer. [more]
  • Isochrones: Aims at studying isochrones as a tool for reachability and catchment analysis in spatial network databases. [more]
  • Finished projects: AQuiST, MEDAN, eBZ, eMayor

Selected Publications (Full list, DBLP, Google Scholar)

  • A. Dignös, B. Glavic, X. Niu, J. Gamper and M. H. Böhlen. Snapshot semantics for temporal multiset relations. PVLDB 2019 (To appear).
  • D. B. Blumenthal, J. Gamper. Improved lower bounds for graph edit distance. TKDE 2018.
  • M. Shekelyan, A. Dignös, J. Gamper. DigitHist: a histogram-based data summary with tight error bounds. PVLDB 2017.
  • 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. [pdf] (Selected by ACM Computing Reviews for the 21st Annual Best of Computing — Notable Books and Articles)
  • A. Dignös, M.H. Böhlen, J. Gamper. Overlap interval partition join. SIGMOD 2014. [pdf]
  • M. Khayati, M.H. Böhlen, and J. Gamper. Memory-efficient centroid decomposition for long time series. ICDE 2014.
  • A. Dignös, M.H. Böhlen, J. Gamper. Temporal alignment. SIGMOD 2012. [pdf]
  • J. Gordevicius, J. Gamper, M.H. Böhlen. Parsimonious temporal aggregation. VLDB Journal 2012.
  • N. Augsten, M. Böhlen, C. Dyreson, J. Gamper. Windowed pq-grams for approximate joins of data-centric XML. VLDB Journal 2012.
  • I. Timko, M. Böhlen, J. Gamper. Sequenced spatiotemporal aggregation for coarse query granularities. VLDB Journal 2011. [pdf]
  • N. Augsten, M. Böhlen, J. Gamper. The pq-gram distance between ordered labeled trees. TODS 2010. [pdf]
  • N. Augsten, M. Böhlen, J. Gamper. An incrementally maintainable index for approximate lookups in hierarchical data. VLDB 2006. [pdf]
  • N. Augsten, M. Böhlen, J. Gamper. Approximate matching of hierarchical data using pq-grams. VLDB 2005. [pdf]

Scientific Services

Reviewing for journals: TODS, VLDBJ, TKDE, SIGMOD Record, Information Systems, DKE, AICOM, AIM.
Programme committees: VLDB (2019, 2017, 2015), SIGMOD (2019, 2014, 2011), ICDE (2017, 2016, 2010), EDBT (2019, 2017, 2016, 2015, 2013, 2011, 2009), SIGSPATIAL (2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011), SSDBM (2015, 2014, 2012, 2011, 2010), DASFAA (2018, 2017, 2015, 2014), ADBIS (2015, 2014, 2013, 2012, 2009, 2008), SOFSEM (2019, 2018, 2017, 2016, 2014, 2012, 2010).
General chair of SSDBM 2018.
PC co-hair of TIME 2019.
Workshops co-chair of ADBIS (2019, 2017).
I am a member of ACM and IEEE CS.

Teaching and Student Supervision

Current PhD students: David B. Blumenthal, Giovanni Mahlknecht.

Former PhD students: Michael Shekelyan, Theodoros Chondrogiannis, Daniel Taliun, Bruno Cadonna, Juozas Gordevicius, Markus Innerebner. Co-supervision: Nikolaus Augsten, Romans Kasperovics, Judith Knapp.

Courses I am currently teaching:

Proposals for BSc/MSc theses are here.