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 associate professor at the Faculty of Computer Science of the Free University of Bozen-Bolzano (FUB). I received a M.Sc. degree in CS from the TU Vienna (1989) and a Ph.D. degree in CS from the RWTH Aachen (1996). 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. The research problems originate from different application areas, such as government, tourism, health-care, and agriculture.

Research Projects

The Temporal RDBMS project 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 with the help of two primitives. Our solution is implemented in the kernel of PostgreSQL. [more]

In the DASA project we aim 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 in time series (e.g., most similar Summer). [more]

The Isochrones project 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)

  • 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.
  • D. Taliun, J. Gamper, C. Pattaro. Efficient haplotype block recognition of very long and dense genetic sequences. BMC Bioinformatics 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 (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).
I am a member of ACM and IEEE CS.

Teaching and Student Supervision

I am currently supervising the following PhD students: David 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.

At the graduate and undergraduate level, I am teaching the following courses:

Proposals for BSc/MSc theses are available here.