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- Renaud Hartert, Stefano Vissicchio, +4 authors Pierre François
- Computer Communication Review
- 2015

SDN simplifies network management by relying on declarativity (high-level interface) and expressiveness (network flexibility). We propose a solution to support those features while preserving high robustness and scalability as needed in carrier-grade networks. Our solution is based on (i) a two-layer architecture separating connectivity and optimization… (More)

- Pierre Schaus, Jean-Charles Régin
- EURO J. Computational Optimization
- 2014

Many assignment problems require the solution to be balanced. Such a problem is the Balanced Academic Curriculum Problem (BACP) [1]. Standard deviation is a common way to measure the balance of a set of values. A recent constraint presented by Pesant and Régin [2] enforces the mean µ and the standard deviation σ of a set of variables. Our work extends [2]… (More)

- Pierre Schaus, Yves Deville, Pierre Dupont
- CP
- 2007

Deviation is a recent constraint to balance a set of variables with respect to a given mean. We show that the propagators recently introduced are not bound-consistent when the mean is rational. We introduce bound-consistent propagators running in linear time with respect to the number of variables. We evaluate the improvement in terms of efficiency and… (More)

- Steven Gay, Renaud Hartert, Pierre Schaus
- CPAIOR
- 2015

- E F Berman, P Schaus, J M Fujimoto
- Journal of toxicology and environmental health
- 1986

Rats were treated with chlordecone, mirex, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), and respective solvent vehicle. Under urethane or pentobarbital anesthesia, the bile duct was cannulated and radioactive morphine, imipramine, or ouabain was given by segmented retrograde intrabiliary injection. The spectrum of inhibition of biliary excretion by… (More)

- Pierre Schaus, Yves Deville, Pierre Dupont, Jean-Charles Régin
- CPAIOR
- 2007

This paper introduces DEVIATION, a soft global constraint to obtain balanced solutions. A violation measure of the perfect balance can be defined as the Lp norm of the vector variables minus their mean. SPREAD constraints the sum of square deviations to the mean [5, 7] i.e. the L2 norm. The L1 norm is considered here. Neither criterion subsumes the other… (More)

- Pierre Schaus, Pascal Van Hentenryck, Jean-Charles Régin
- CPAIOR
- 2009

This paper considers the daily assignment of newborn infant patients to nurses in a hospital. The objective is to balance the workload of the nurses, while satisfying a variety of side constraints. Prior work proposed a MIP model for this problem, which unfortunately did not scale to large instances and only approximated the objective function, since… (More)

- Pierre Schaus
- 2009

This work could not have been achieved without the support of the following persons. My parents who encourage me to finish this thesis (even by coming in Providence). They are great example for their five children. My wife Caro who supports me everyday. She's always there to remind me what is the most important in my life and helps me to find a good balance… (More)

- Pierre Schaus, Renaud Hartert
- CP
- 2013

Large neighborhood search (LNS) [25] is a framework that combines the expressiveness of constraint programming with the efficiency of local search to solve combinatorial optimization problems. This paper introduces an extension of LNS, called multi-objective LNS (MO-LNS), to solve multi-objective combi-natorial optimization problems ubiquitous in practice.… (More)