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 at the Faculty of Computer Science of the Free University of Bozen-Bolzano. My research interests focus on database technologies for processing temporal and spatial data, data warehousing and analytics, and approximate query answering. 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 full-fledged support for querying interval-timestamped data. 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., most similar Summer. [more]
  • Isochrones: Aims at studying isochrones as a tool for reachability and catchment analysis in spatial network databases. [more]
  • Finished projects: OSTAR, AQuiST, MEDAN, eBZ, eMayor

Selected Publications (Full list, DBLP, Google Scholar)

  • 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 as part of the 21st Annual Best of Computing by ACM Computing Reviews)
  • D. Taliun, J. Gamper, U. Leser, C. Pattaro. Fast sampling-based whole-genome haplotype block recognition. TCBB 2016. [pdf]
  • 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, C. Dyreson, J. Gamper. Approximate joins for data centric XML. ICDE 2008.
  • 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 (2014, 2011), ICDE (2017, 2016, 2010), EDBT (2017, 2016, 2015, 2013, 2011, 2009), SIGSPATIAL (2016, 2015, 2014, 2013, 2012, 2011), SSDBM (2015, 2014, 2012, 2011, 2010), DASFAA (2017, 2015, 2014), ADBIS (2015, 2014, 2013, 2012, 2009, 2008), SOFSEM (2018, 2017, 2016, 2014, 2012, 2010).
General chair of SSDBM 2018
I am a member of ACM and IEEE CS.

Teaching and Student Supervision

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

Former PhD students: 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.