Now showing items 196-215 of 1009

  • Dal percorso di apprendimento all'itinerario virtuale: esperienze sul Web 2.0 

    Gianuzzi, V; Dodero, G; Forcheri, P; Di Cerbo, F (Università degli Studi di Trento, 2009)
    Questo lavoro illustra una metodologia di progettazione di corsi, erogati in modalità tradizionale, ibrida o a distanza, utilizzando strumenti di apprendimento collaborativo basati sulle tecnologie Web 2.0. Si presenteranno ...
  • Data complexity of query answering in description logics (Extended abstract) 

    Calvanese D; De Giacomo G; Lembo D; Lenzerini M; Rosati R (AAAI Press, 2015)
    We study the data complexity of answering conjunctive queries over Description Logic knowledge bases constituted by a TBox and an ABox. In particular, we are interested in characterizing the FO-rewritability and the ...
  • A data generator for multi-stream data 

    Siddiqui ZF; Spiliopoulou M; Symeonidis P; Tiakas E (NA, 2011)
    We present a stream data generator. The generator is mainly intended for multiple interrelated streams, in particular for objects with temporal properties, which are fed by dependent streams. Such data are e.g. customers ...
  • A Data Stream Publish/Subscribe Architecture with Self-adapting Queries 

    Gray, AJG; Nutt, W (Springer, 2005)
    In data stream applications, streams typically arise from a geographically distributed collection of producers and may be queried by consumers, which may be distributed as well. In such a setting, a query can be seen as a ...
  • Database Technology for Processing Temporal Data (Invited Paper) 

    Böhlen M H; Dignös A; Gamper J; Jensen C S (Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2018)
    Despite the ubiquity of temporal data and considerable research on processing such data, database systems largely remain designed for processing the current state of some modeled reality. More recently, we have seen an ...
  • A Database-Specific Pattern for Multi-cloud High Availability and Disaster Recovery 

    Xiong H; Fowley F; Pahl C (Springer-Verlag, 2016)
    High availability and disaster recovery (HADR) are often discussed in highly critical business systems for business function recovery and continuity concerns. With the development of cloud computing, virtual cloud services ...
  • A dataset of multimedia material about classical music: PHENICX-SMM 

    Schedl M; Hauger D; Tkalcic M; Melenhorst MS; Liem CCS (IEEE, 2016)
    We present a freely available dataset of multimedia material that can be used to build enriched browsing and retrieval systems for music. It is one result of the EU-FP7 funded project Performances as Highly Enriched aNd ...
  • Dealing with Inconsistencies due to Class Disjointness in SPARQL Update 

    Ahmeti A; Calvanese D; Polleres A; Savenkov V (RWTH, 2015)
    The problem of updating ontologies has received increased attention in recent years. In the approaches proposed so far, either the update language is restricted to (sets of) atomic updates, or, where the full SPARQL Update ...
  • Debugging EL+ Ontologies through Horn MUS Enumeration 

    Ignatiev A; Marques-Silva J; Mencía C; Peñaloza R (CEUR-WS.org, 2017)
    In description logics (DLs), axiom pinpointing refers to the problem of enumerating the minimal subsets of axioms from an ontology that entail a given consequence. Recent developments on axiom pinpointing for the light-weight ...
  • Decidable Reasoning over Timestamped Conceptual Models 

    Artale, A; Toman, D (CEUR, 2008)
  • A decidable very expressive description logic for databases 

    Artale A; Franconi E; Penaloza R; Sportelli F (Springer, 2017)
    We introduce DLR+, an extension of the n-ary propositionally closed description logic DLR to deal with attribute-labelled tuples (generalising the positional notation), projections of relations, and global and local ...
  • A decidable very expressive n-ary description logic for database applications (extended abstract) 

    Artale A; Franconi E; Penaloza R; Sportelli F (RWTH, 2017)
    We introduce DLR+, an extension of the n-ary propositionally closed description logic DLR to deal with attribute-labelled tuples (generalising the positional notation), projections of relations, and global and local ...
  • A Decision Framework for Blockchain Platforms for IoT and Edge Computing 

    El Ioini N; Pahl C; Helmer S (SCITEPRESS, 2018)
    Blockchains started as an enabling technology in the area of digital currencies with the introduction of Bitcoin. However, blockchains have emerged as a technology that goes beyond financial transactions by providing a ...
  • Decision Making Strategies Differ in the Presence of Collaborative Explanations: Two Conjoint Studies 

    Coba L; Zanker M; Rook L; Symeonidis P (ACM Digital Library, 2019)
    Rating-based summary statistics are ubiquitous in e-commerce, and often are crucial components in personalized recommendation mechanisms. Especially visual rating summarizations have been identified as important means to ...
  • Declarative Process Modeling in BPMN 

    Dumas, M; Maggi, FM; Montali, M; de Giacomo, G (Springer, 2015)
    Traditional business process modeling notations, including the standard Business Process Model and Notation (BPMN), rely on an imperative paradigm wherein the process model captures all allowed activity flows. In other ...
  • Declarative technologies for open agent systems and beyond 

    Chesani, F; Mello, P; Montali, M; Torroni, P (Springer, 2010)
    Open systems are complex, heterogeneous systems whose complexity is often handled by component-based approaches. While the internal functioning of such components is invisible to the outside, a great emphasis is put on the ...
  • Defining an Open Source Software Trustworthiness Model 

    Taibi, D (IDoESE, 2008)
    In an ideal word, totally trustworthy software would provide an absolute guarantee that it will perform its required functions under all possible circumstances, will do so on time, and will never perform any actions that ...
  • Dependency analysis in ontology-driven content-based systems 

    Abgaz YM; Javed M; Pahl C (Springer, 2012)
    Ontology-driven content-based systems are content-based systems (ODCBS) that are built to provide a better access to information by semantically annotating the content using ontologies. Such systems contain ontology layer, ...
  • Depth-Based Stereoscopic Projection Approach for 3D Saliency Detection 

    Lin HY; Lin CY; Zhao Y; Xiao JM; Tillo T (SPRINGER, 2015)
    With the popularity of 3D display and the widespread using of depth camera, 3D saliency detection is feasible and significant. Different with 2D saliency detection, 3D saliency detection increases an additional depth channel ...
  • Description logic based dynamic systems: Modeling, verification, and synthesis 

    Calvanese D; Montali M; Patrizi F; De Giacomo G (AAAI Press, 2015)
    We study the data complexity of answering conjunctive queries over Description Logic knowledge bases constituted by a TBox and an ABox. In particular, we are interested in characterizing the FO-rewritability and the ...