Now showing items 311-330 of 1133

    • Entity and Aspect Extraction for Organizing News Comments 

      Prasojo, RE; Kacimi, M; Nutt, W (ACM, 2015)
      News websites give their users the opportunity to participate in discussions about published articles, by writing comments. Typically, these comments are unstructured making it hard to understand the flow of user discussions. ...
    • Entity-from-relationship modelling 

      Masolo C; Artale A (Springer, 2013)
      We investigate the problem of the (re-)identification of new entities emerging from the presence of relationships in a conceptual schema. While the general practice is to reify the relation and thus individuating as many ...
    • Envisioning a Computational Thinking Assessment Tool 

      Fronza I; Pahl C (CEUR-WS.org, 2018)
      Recent work on Computational Thinking (CT) has focused on proposing new curricula but in many cases the assessment phase has been overlooked. The issue is critical because appropriate assessment is needed to facilitate the ...
    • Error-Tolerant Reasoning in the Description Logic EL 

      Ludwig, M; Penaloza, R (Springer-Verlag, 2014)
      Developing and maintaining ontologies is an expensive and error-prone task. After an error is detected, users may have to wait for a long time before a corrected version of the ontology is available. In the meantime, one ...
    • Estimating the Output Cardinality of Partial Preaggregation with a Measure of Clusteredness 

      Helmer, S; Neumann, T; Moerkotte, G (ACM, 2003)
      We introduce a new parameter, the clusteredness of data, and show how it can be used for estimating the output cardinality of a partial preaggregation operator. This provides the query optimizer with an important piece of ...
    • Eudaimonic modeling of moviegoers 

      Tkalcic M; Ferwerda B (ACM, 2018)
      One of the important aspects of movie-making is to trigger emotional responses in viewers. These emotional experiences can be divided into hedonic and eudaimonic. While the former are characterized as plain enjoyment, the ...
    • Evaluating compliance: From LTL to abductive logic programming 

      Montali, M; Chesani, F; Gavanelli, M; Lamma, E; Mello, P (CEUR, 2015)
      The compliance verification task amounts to establishing if the execution of a system, given in terms of observed events, does re-spect a given property. In the past both the frameworks of Temporal Logics and Logic Programming ...
    • Evaluating compliance: from LTL to abductive logic programming 

      Montali M; Chesani F; Gavanelli M; Lamma E; Mello P (CEUR, 2015)
      The compliance verification task amounts to establishing if the execution of a system, given in terms of observed events, does re-spect a given property. In the past both the frameworks of Temporal Logics and Logic Programming ...
    • 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 ...
    • Evaluating SPARQL-to-SQL Translation in ontop 

      Rodriguez-Muro M; Rezk M; Hardi J; Slusnys M; Bagosi T; Calvanese D (CEUR Electronic Workshop Proceedings, 2013)
      In this paper we evaluate the performance of the SQL queries generated by ontop, a system that uses a formal approach to translate and optimize SPARQL queries and R2RML mappings. We show that the performance of ontop's SQL ...
    • Evaluation of a Coordinating Controller for Improved Task Performance in Multi-User Teleoperation 

      Schauss T; Groten R; Peer A; Buss M (Springer, 2010)
      In virtual reality as well as teleoperation the interaction between multiple users is impaired by the mediated signal exchange between partners. To answer challenges of such scenarios assistance functions taking the ...
    • Evaluation of main memory join algorithms for joins with subset join predicates 

      Helmer, S; Moerkotte, G (Morgan Kaufmann Publishers, 1997)
      Current data models like the NF2 model and object-oriented models support set-valued attributes. Hence, it becomes possible to have join predicates based on set comparison. This paper introduces and evaluates two main ...
    • An evaluation of scaffolding for virtual interactive tutorials 

      Pahl C (Association for the Advancement of Computers in Education, 2002)
      Scaffolding refers to a temporary support framework used during construction. Applied to teaching and learning it describes measures to support a learner to become confident and self-reliant in a subject. In a Web environment ...
    • Evaluation of usage patterns for web-based educational systems using web mining 

      Donnellan D; Pahl C (MCIL, 2001)
      Virtual courses often separate teacher and student physically from one another, resulting in less direct feedback. The evaluation of virtual courses and other computer-supported educational systems is therefore of major ...
    • An Evaluation of VIG with the BSBM Benchmark 

      Lanti D; Xiao G; Calvanese D (CEUR-WS, 2016)
      We present an experimental evaluation of VIG, a data scaler for OBDA benchmarks. Data scaling is a relatively recent approach, proposed in the database community, that allows for scaling an input data instance to s times ...
    • The Even More Irresistible SROIQ 

      Horrocks, I; Kutz, O; Sattler, U (AAAI Press, 2006)
      We describe an extension of the description logic underlying OWL-DL, SHOIN, with a number of expressive means that we believe will make it more useful in practise. Roughly speaking, we extend SHOIN with all expressive means ...
    • Event condition expectation (ECE-) rules for monitoring observable systems 

      Bragaglia S; Chesani F; Fry E; Mello P; Montali M; Sottara D (Springer, 2011)
      The standardization and broad adoption of Service Oriented Architectures, Web Services, and Cloud Computing is raising the complexity of ICT systems. Hence, assuring correct system behavior with regard to established design ...
    • An Event Detection Framework Supported by a Smart Graphical User Interface 

      Persia F; Helmer S (IEEE, 2016)
      We develop a graphical user interface for defining events in a framework for detecting high-level surveillance events from a video stream, as the language used for the events may be too complex for an ordinary user. The ...
    • Evolution of design patterns: a replication study 

      Rossi, B; Russo, B (ACM, 2014)
      Context. In 2007, Aversano et al. [2] analysed the evolution of JHotDraw, ArgoUML, and Eclipse JDT b.tween years 2000-2005 to understand the role of frequently changed design patterns. Goal. In this paper, we perform a ...
    • Evolution of DL-Lite Knowledge Bases 

      Calvanese, D; Kharlamov, E; Nutt, W; Zheleznyakov, D (Springer, 2010)
      We study the problem of evolution for Knowledge Bases (KBs) expressed in Description Logics (DLs) of the DL-Lite family. DL-Lite is at the basis of OWL 2 QL, one of the tractable fragments of OWL 2, the recently proposed ...