no code implementations • 22 Oct 2023 • Pierangela Bruno, Francesco Calimeri, Cinzia Marte, Simona Perri
Although the availability of a large amount of data is usually given for granted, there are relevant scenarios where this is not the case; for instance, in the biomedical/healthcare domain, some applications require to build huge datasets of proper images, but the acquisition of such images is often hard for different reasons (e. g., accessibility, costs, pathology-related variability), thus causing limited and usually imbalanced datasets.
no code implementations • 26 Aug 2022 • Nicola Leone, Marco Manna, Maria Concetta Morelli, Simona Perri
The paper investigates the relative expressiveness of two logic-based languages for reasoning over streams, namely LARS Programs -- the language of the Logic-based framework for Analytic Reasoning over Streams called LARS -- and LDSR -- the language of the recent extension of the I-DLV system for stream reasoning called I-DLV-sr.
1 code implementation • 5 Aug 2021 • Francesco Calimeri, Marco Manna, Elena Mastria, Maria Concetta Morelli, Simona Perri, Jessica Zangari
We introduce a novel logic-based system for reasoning over data streams, which relies on a framework enabling a tight, fine-tuned interaction between Apache Flink and the I^2-DLV system.
no code implementations • 22 Sep 2020 • Elena Mastria, Jessica Zangari, Simona Perri, Francesco Calimeri
In particular, given an ASP program and a set of input facts, our approach chooses whether and how to rewrite input rules based on a set of features measuring their structural properties and domain information.
no code implementations • 29 Jul 2019 • Alessio Fiorentino, Nicola Leone, Marco Manna, Simona Perri, Jessica Zangari
With the more and more growing demand for semantic Web services over large databases, an efficient evaluation of Datalog queries is arousing a renewed interest among researchers and industry experts.
no code implementations • 22 Jul 2019 • Francesco Calimeri, Giovambattista Ianni, Francesco Pacenza, Simona Perri, Jessica Zangari
In this context, we propose an incremental grounding approach for the answer set semantics.
no code implementations • 23 Dec 2018 • Francesco Calimeri, Simona Perri, Jessica Zangari
Furthermore, we define a set of new heuristics tailored at optimizing grounding, one of the main phases of the ASP computation; we use them in order to implement the approach into the ASP system DLV, in particular into its grounding subsystem I-DLV, and carry out an extensive experimental activity for assessing the impact of the proposal.
1 code implementation • 21 Jul 2017 • Francesco Calimeri, Davide Fuscà, Stefano Germano, Simona Perri, Jessica Zangari
Answer Set Programming (ASP) is a well-established declarative problem solving paradigm which became widely used in AI and recognized as a powerful tool for knowledge representation and reasoning (KRR), especially for its high expressiveness and the ability to deal also with incomplete knowledge.
no code implementations • 18 Jan 2014 • Mario Alviano, Francesco Calimeri, Wolfgang Faber, Nicola Leone, Simona Perri
As a consequence, a well-founded semantics for general LPA programs that allows for tractable computation is unlikely to exist, which justifies the restriction on LPAma programs.
no code implementations • 4 Nov 2002 • Nicola Leone, Gerald Pfeifer, Wolfgang Faber, Thomas Eiter, Georg Gottlob, Simona Perri, Francesco Scarcello
As for problem solving, we provide a formal definition of its kernel language, function-free disjunctive logic programs (also known as disjunctive datalog), extended by weak constraints, which are a powerful tool to express optimization problems.