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Publications

Publications by Vítor Santos Costa

2010

Probabilistic inductive querying using problog

Authors
De Raedt, L; Kimmig, A; Gutmann, B; Kersting, K; Costa, VS; Toivonen, H;

Publication
Inductive Databases and Constraint-Based Data Mining

Abstract
We study how probabilistic reasoning and inductive querying can be combined within ProbLog, a recent probabilistic extension of Prolog. ProbLog can be regarded as a database system that supports both probabilistic and inductive reasoning through a variety of querying mechanisms. After a short introduction to ProbLog, we provide a survey of the different types of inductive queries that ProbLog supports, and show how it can be applied to the mining of large biological networks. © 2010 Springer Science+Business Media, LLC.

2012

A problog model for analyzing gene regulatory networks

Authors
Goncalves, A; Ong, IM; Lewis, JA; Santos Costa, V;

Publication
CEUR Workshop Proceedings

Abstract
Transcriptional regulation play an important role in every cellular decision. Gaining an understanding of the dynamics that govern how a cell will respond to diverse environmental cues is difficult using intuition alone. We introduce logic-based regulation models based on state-of-the-art work on statistical relational learning, to show that network hypotheses can be generated from existing gene expression data for use by experimental biologists.

2012

Identifying adverse drug events by relational learning

Authors
Page, D; Costa, VS; Natarajan, S; Barnard, A; Peissig, P; Caldwell, M;

Publication
Proceedings of the National Conference on Artificial Intelligence

Abstract
The pharmaceutical industry, consumer protection groups, users of medications and government oversight agencies are all strongly interested in identifying adverse reactions to drugs. While a clinical trial of a drug may use only a thousand patients, once a drug is released on the market it may be taken by millions of patients. As a result, in many cases adverse drug events (ADEs) are observed in the broader population that were not identified during clinical trials. Therefore, there is a need for continued, post-marketing surveillance of drugs to identify previously-unanticipated ADEs. This paper casts this problem as a reverse machine learning task, related to relational subgroup discovery and provides an initial evaluation of this approach based on experiments with an actual EMR/EHR and known adverse drug events. Copyright

2011

Interactive Discriminative Mining of Chemical Fragments

Authors
Fonseca, NA; Pereira, M; Costa, VS; Camacho, R;

Publication
INDUCTIVE LOGIC PROGRAMMING, ILP 2010

Abstract
Structural activity prediction is one of the most important tasks in chemoinformatics. The goal is to predict a property of interest given structural data on a set of small compounds or drugs. Ideally, systems that address this task should not just be accurate, but they should also be able to identify an interpretable discriminative structure which describes the most discriminant structural elements with respect to some target. The application of ILP in an interactive software for discriminative mining of chemical fragments is presented in this paper. In particular, it is described the coupling of an ILP system with a molecular visualisation software that allows a chemist to graphically control the search for interesting patterns in chemical fragments. Furthermore, we show how structural information, such as rings, functional groups such as carboxyls, amines, methyls, and esters, are integrated and exploited in the search.

2006

The design and implementation of the YAP compiler: An optimizing compiler for logic programming languages

Authors
Da Silva, AF; Costa, VS;

Publication
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Abstract

2008

Induction as a search procedure

Authors
Konstantopoulos, S; Camacho, R; Fonseca, NA; Costa, VS;

Publication
Artificial Intelligence for Advanced Problem Solving Techniques

Abstract
This chapter introduces inductive logic programming (ILP) from the perspective of search algorithms in computer science. It first briefly considers the version spaces approach to induction, and then focuses on inductive logic programming: from its formal definition and main techniques and strategies, to priors used to restrict the search space and optimized sequential, parallel, and stochastic algorithms. The authors hope that this presentation of the theory and applications of inductive logic programming will help the reader understand the theoretical underpinnings of ILP, and also provide a helpful overview of the State-of-the-Art in the domain. © 2008, IGI Global.

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