B
Barry O'Sullivan
Researcher at University College Cork
Publications - 324
Citations - 3966
Barry O'Sullivan is an academic researcher from University College Cork. The author has contributed to research in topics: Constraint programming & Constraint satisfaction problem. The author has an hindex of 29, co-authored 312 publications receiving 3610 citations. Previous affiliations of Barry O'Sullivan include Brown University & National University of Ireland.
Papers
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Book ChapterDOI
DBMS Log Analytics for Detecting Insider Threats in Contemporary Organizations
TL;DR: An anomaly-based mechanism that detects insider attacks within a DBMS framework is proposed whereby a model of normative behavior of insiders n-grams are used to capture normal query patterns in a log of SQL queries generated from a synthetic banking application system.
Proceedings ArticleDOI
A Combinatorial Optimisation Approach to the Design of Dual Parented Long-Reach Passive Optical Networks
Hadrien Cambazard,Deepak Mehta,Barry O'Sullivan,Luis Quesada,Marco Ruffini,David B. Payne,Linda Doyle +6 more
TL;DR: It is proved that the decision variant of this problem is NP-Complete and three alternative combinatorial optimisation approaches to finding an optimal metro node placement are presented using: a mixed integer linear programming formulation of the problem, a hybrid approach that uses clustering as a preprocessing step, and, finally, a local search approach.
Book ChapterDOI
A Two-Phase Constraint Programming Model for Examination Timetabling at University College Cork
Begum Genc,Barry O'Sullivan +1 more
TL;DR: This work proposes a two-phase constraint programming approach to solving UCC ’s examination timetabling problem and generates significantly better timetables for the university, as measured using a variety of real-world quality metrics, than those prepared by their timetabling experts, and in a reasonable timeframe.
Posted Content
The Inductive Constraint Programming Loop
Christian Bessiere,Luc De Raedt,Tias Guns,Lars Kotthoff,Mirco Nanni,Siegfried Nijssen,Barry O'Sullivan,Anastasia Paparrizou,Dino Pedreschi,Helmut Simonis +9 more
TL;DR: The authors propose a new framework that they call the inductive constraint programming loop, which aims to bridge the gap between the areas of data mining and machine learning on one hand and constraint programming on the other.
Book ChapterDOI
A Study of Electricity Price Features on Distributed Internet Data Centers
Milan De Cauwer,Barry O'Sullivan +1 more
TL;DR: This paper systematically study the impact of the level of price variability, time lag between locations due to the geographical distribution, reconfiguration delay, and accuracy of price predictions, on the overall electricity cost associated with managing an IDC.