Now showing items 1-20 of 21

    • App "Ö-Tour Challenge Kärnten" 

      Gamper, J (2014)
      The "Ö-Tour Challenge Martelltal" app for Android and iOS is an adaptation of the "Giro Challenge" app and allows cyclists to compare their performance to that of other athletes along the stage to the Dobratsch of the ...
    • Approximate joins for data centric XML 

      Augsten, N; Böhlen, M; Dyreson, C; Gamper, J (IEEE, 2008)
      In data integration applications, a join matches elements that are common to two data sources. Often, however, elements are represented slightly different in each source, so an approximate join must be used. For XML data, ...
    • Computing isochrones in multi-modal, schedule-based transport networks 

      Bauer, V; Gamper, J; Loperfido, R; Profanter, S; Putzer, S; Timko, I (Curran, 2008)
      Isochrones are defined as the set of all points from which a specific point of interest is reachable within a given time span. This demo paper presents a solution to compute isochrones in multi-modal, schedule-based transport ...
    • Determining objects within isochrones in spatial network databases 

      Marciuska, S; Gamper, J (Springer, 2010)
      Isochrones are generally defined as the set of all space points from which a query point can be reached in a given timespan, and they are used in urban planning to conduct reachability and coverage analyzes in a city. In ...
    • Efficient evaluation of ad-hoc range aggregates 

      Ammendola, C; Böhlen, MH; Gamper, J (Springer, 2013)
      θ-MDA is a flexible and efficient operator for complex ad-hoc multi-dimensional aggregation queries. It separates the specification of aggregation groups for which aggregate values are computed (base table b) and the ...
    • Efficient haplotype block recognition of very long and dense genetic sequences 

      Taliun, D; Gamper, J; Pattaro, C (2014)
      Conclusions: The MIG(++) enables to perform LD-based haplotype block recognition on genetic sequences of any length and density. In the new generation sequencing era, this can help identify haplotypes that carry rare ...
    • Evaluating exceptions on time slices 

      Kasperovics, R; Böhlen, MH; Gamper, J (Springer, 2009)
      Public transport schedules contain temporal data with many regular patterns that can be represented compactly. Exceptions come as modifications of the initial schedule and break the regular patterns increasing the size of ...
    • Fast Sampling-Based Whole-Genome Haplotype Block Recognition 

      Taliun, D; Gamper, J; Leser, U; Pattaro, C (2016)
      Scaling linkage disequilibrium (LD) based haplotype block recognition to the entire human genome has always been a challenge. The best-known algorithm has quadratic runtime complexity and, even when sophisticated search ...
    • A greedy approach towards parsimonious temporal aggregation 

      Gordevicius, J; Gamper, J; Böhlen, M (IEEE, 2008)
      Temporal aggregation is a crucial operator in temporal databases and has been studied in various flavors. In instant temporal aggregation (ITA) the aggregate value at time instant t is computed from the tuples that hold ...
    • ISOGA: A system for geographical reachability analysis 

      Innerebner, M; Böhlen, MH; Gamper, J (Springer, 2013)
      In this paper, we present a web-based system, termed ISOGA, that uses isochrones to perform geographical reachability analysis. An isochrone in a spatial network covers all space points from where a query point is reachable ...
    • MIRIS unleashed 

      Dongilli, P; Gamper, J (IOS Press, 2003)
      Documentation and easy accessibility of data on matters relating to national and ethnic minorities is becoming increasingly significant. Even over the last couple of years, legal standardisation in Europe, the enlargement ...
    • On the efficient construction of multislices from recurrences 

      Kasperovics, R; Böhlen, MH; Gamper, J (Springer, 2010)
      Recurrences are defined as sets of time instants associated with events and they are present in many application domains, including public transport schedules and personal calendars. Because of their large size, recurrences ...
    • Parsimonious temporal aggregation 

      Gordevivius, J; Gamper, J; Böhlen, M (Assoc. for Computing Machinery, 2009)
      Temporal aggregation is a crucial operator in temporal databases and has been studied in various flavors, including instant temporal aggregation (ITA) and span temporal aggregation (STA), each having its strengths and ...
    • The pq-gram distance between ordered labeled trees 

      Augsten, J; Böhlen, MH; Gamper, J (Association for Computing Machinery (ACM), 2010)
      When integrating data from autonomous sources, exact matches of data items that represent the same real-world object often fail due to a lack of common keys. Yet in many cases structural information is available and can ...
    • Ranking of evolving stories through meta-aggregation 

      Gordevicius, J; Estrada, F; Lee, HC; Andritsos, P; Gamper, J (ACM, 2010)
      In this paper we focus on the problem of ranking news stories within their historical context by exploiting their content similarity. We observe that news stories evolve and thus have to be ranked in a time and query ...
    • Representing public transport schedules as repeating trips 

      Kasperovics, R; Böhlen, M; Gamper, J (IEEE, 2008)
      The movement in public transport networks is organized according to schedules. The real-world schedules are specified by a set of periodic rules and a number of irregularities from these rules. The irregularities appear ...
    • Sequenced spatio-temporal aggregation in road networks 

      Timko, I; Böhlen, M; Gamper, J (Association for Computing Machinery, 2009)
      Many applications of spatio-temporal databases require support for sequenced spatio-temporal (SST) aggregation, e.g., when analyzing traffic density in a city. Conceptually, an SST aggregation produces one aggregate value ...
    • SQL-based temporal query languages 

      Böhlen, M; Gamper, J; Jensen, CS; Snodgrass, RT (Springer US, 2009)
    • Temporal aggregation 

      Gamper, J; Böhlen, M; Jensen, C (Springer US, 2009)