Now showing items 72-91 of 400

  • Data complexity of query answering in description logics 

    Calvanese D; De Giacomo G; Lembo D; Lenzerini M; Rosati R (2013)
    In this paper we study data complexity of answering conjunctive queries over Description Logic (DL) knowledge bases constituted by an ABox and a TBox.  In particular, we are interested in characterizing the FOL-rewritability ...
  • Data integration in mediated service compositions 

    Pahl C; Zhu Y (Slovak Academy of Sciences, 2012)
    A major aim of the Web service platform is the integration of existing software and information systems. Data integration is a central aspect in this con- text. Traditional techniques for information and data transformation ...
  • Data mining technology for the evaluation of learning content interaction 

    Pahl, C (Association for the Advancement of Computing in Education, 2004)
    Interactivity is central for the success of learning. In e-learning and other educational multimedia environments, the evaluation of interaction and behaviour is particularly crucial. Data mining – a non-intrusive, objective ...
  • Database for contextual personalization 

    Košir A; Odić A; Kunaver M; Tkalčič M; Tasič J (2011)
    In recent years, research into user centric and personalized applications has focused on the utilization of contextual information about the situation in which the user is consuming the content item. However, there is no ...
  • DB-Nets: on The Marriage of Colored Petri Nets and Relational Databases 

    Montali M; Rivkin A (Springer, 2017)
    The integrated management of business processes and master data is being increasingly considered as a fundamental problem, by both the academia and the industry. In this position paper, we focus on the foundations of the ...
  • Dealing with explicit preferences and uncertainty in answer set programming 

    Confalonieri R; Nieves J; Osorio M; Vázquez-Salceda J (2012)
    In this paper, we show how the formalism of Logic Programs with Ordered Disjunction (LPODs) and Possibilistic Answer Set Programming (PASP) can be merged into the single framework of Logic Programs with Possibilistic Ordered ...
  • Decidability and Complexity of Fuzzy Description Logics 

    Baader F; Borgwardt S; Peñaloza R (2017)
    Fuzzy description logics (FDLs) have been introduced to represent concepts for which membership cannot be determined in a precise way, i.e., where instead of providing a strict border between being a member and not being ...
  • Deciding equivalences among conjunctive aggregate queries 

    Cohen, S; Nutt, W; Sagiv, Y (Association for Computing Machinery, 2007)
    Equivalence of aggregate queries is investigated for the class of conjunctive queries with comparisons and the aggregate operators count, count-distinct, min, max, and sum. Essentially, this class contains unnested SQL ...
  • Decision Biases in Recommender Systems 

    Teppan, E; Zanker, M (2015)
    Recommender systems support online consumers in identifying suitable products from vast and complex product assortments. Typically, recommender systems compute choice sets of the top-k ranked products. Based on the actual ...
  • Declarative specification and verification of service choreographies 

    Montali, M; Pesic, M; Chesani, F; Mello, P; Storari, S; Van Der Aalst, WMP (Association for Computing Machinery (ACM), 2010)
    Service-oriented computing, an emerging paradigm for architecting and implementing business collaborations within and across organizational boundaries, is currently of interest to both software vendors and scientists. While ...
  • Depth map coding using histogram-based segmentation and depth range updating 

    Lin C; Zhao Y; Xiao J; Tillo T (Korean Society for Internet Information, 2015)
    In texture-plus-depth format, depth map compression is an important task. Different from normal texture images, depth maps have less texture information, while contain many homogeneous regions separated by sharp edges. ...
  • Depth Map Down-Sampling and Coding Based on Synthesized View Distortion 

    Yao C; Xiao JM; Tillo T; Zhao Y; Lin CY; Bai HH (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2016)
    In this paper, we propose a depth map down-sampling and coding scheme that minimizes the view synthesis distortion. Moreover, a solution for the optimal depth map down-sampling problem that minimizes the depth-caused ...
  • Depth Map Driven Hole Filling Algorithm Exploiting Temporal Correlation Information 

    Yao C; Tillo T; Zhao Y; Xiao JM; Bai HH; Lin CY (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2014)
    The depth-image-based-rendering is a key technique to realize free viewpoint television. However, one critical problem in these systems is filling the disocclusion due to the 3-D warping process. This paper exploits the ...
  • Describing Database Objects in a Concept Language Environment 

    Artale A; Cesarini F; Soda G (1996)
    We formally investigate the structural similarities and differences existing between object database models and concept languages establishing a correspondence between the two environments. Object database models deal with ...
  • Description logic Knowledge and Action Bases 

    Bagheri Hariri B; Calvanese D; Montali M; De Giacomo G; De Masellis R; Felli P ({AAAI} Press/The {MIT} Press, 2013)
    Description logic Knowledge and Action Bases (KAB) are a mechanism for providing both a semantically rich representation of the information on the domain of interest in terms of a description logic knowledge base and actions ...
  • Design and experimental test of refractive secondary optics on the electrical performance of a 3-junction cell used in CPV systems 

    Renzi M; Cioccolanti L; Barazza G; Egidi L; Comodi G (2017)
    This work analyzes and compares the effects of the secondary optics on the performance of a triple junction solar cell used in a compact HCPV prototype unit. The HCPV system is composed of triple junction III-V (Ga0.5In0.5P, ...
  • The design of a smart tray with its canteen users: A formative study 

    Del Fatto V; Gennari R; Melonio A; Raimato G (Springer, 2017)
    The ability of taking responsible decisions concerning eating depends on the eating context. This paper considers users of university canteen environments. It outlines the GAPH project and system for informing canteen users ...
  • Designing games for deaf children: first guidelines 

    Gennari, R; Melonio, A; Vittorini, P; Di Mascio, T (Inderscience, 2013)
    According to the most recent deaf literature, playing with digital games shows positive effects on deaf children's specific skills. The goal of this paper is to present the first guidelines for the design of games for deaf ...
  • Designing visualizations of temporal relations for children: action research meets HCI 

    Di Mascio T; Gennari R; Tarantino L; Vittorini P (2016)
    The diffusion of ICT products in everyday life is bringing into the realm of technological artifacts new users and their demands, which translate into novel design/research issues, like in the case of children-oriented ...
  • Developing domain ontologies for course content 

    Boyce S; Pahl C (International Forum of Educational Technology & Society, 2007)
    Ontologies have the potential to play an important role in instructional design and the development of course content. They can be used to represent knowledge about content, supporting instructors in creating content or ...