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Efficient evaluation of ad-hoc range aggregates
(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 ... -
eXtreme apprenticeship e learning by doing: Sperimentazione di nuovi metodi nella didattica delle Basi di Dati
(AICA, 2015)Il contributo presenta un metodo innovativo di insegnamento delle Basi di Dati e i risultati della sperimentazione in un Istituto Tecnico. Tale metodo è basato sulla metodologia “Extreme Apprenticeship”, congiunta ad ... -
Entity and Aspect Extraction for Organizing News Comments
(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. ... -
Social commitments in time: satisfied or compensated
(Springer, 2010)We define a framework based on computational logic technology and on a reactive axiomatization of the Event Calculus to formalize the evolution of commitments in time. We propose a new characterization of commitments with ... -
Studying the Effect of UML-Based Models on Source-Code Comprehensibility: Results from a Long-Term Investigation
(Springer International Publishing, 2015)In this paper, we present final results of our long-term investigation whose goal was to study the contribution of software models on source-code comprehensibility. In this investigation we considered unified modeling ... -
Using Time-Sensitive Rooted PageRank to Detect Hierarchical Social Relationships
(Springer, 2014)We study the problem of detecting hierarchical ties in a social network by exploiting the interaction patterns between the actors (members) involved in the network. Motivated by earlier work using a rank-based approach, ... -
Understanding how Novices are Integrated in a Team Analysing their Tool Usage
(Association for Computing Machinery, 2011)Novices' activities can be very different from those of experienced developers. The analysis of tool usage can propose early insights on novices integration in the team and also provide a method to compare their activities ... -
Updating probabilistic XML
(ACM, 2010)We investigate the complexity of performing updates on probabilistic XML data for various classes of probabilistic XML documents of different succinctness. We consider two elementary kinds of updates, insertions and ... -
Life-logs Aggregation for Quality of Life Monitoring
(ACM, 2015)We investigate how life-logs from commercial wearable trackers and smartphone sensors can be leveraged to automatically provide patients with knowledge for self-reflection on their disease. We present here: (1) An architecture ... -
Completing Mixed Language Grammars Through Womb Grammars Plus Ontologies
(Scitepress, 2015)Womb Grammars are a recently introduced constraint-based methodology for acquiring linguistic information on a given language from that of another, implemented in {CHRG} (Constraint Handling Rule Grammars). This is a ...