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008
Publications

2021

Fairness models for multi-agent kidney exchange programmes

Authors
Klimentova, X; Viana, A; Pedroso, JP; Santos, N;

Publication
Omega (United Kingdom)

Abstract
Nowadays there are several countries running independent kidney exchange programmes (KEPs). These programmes allow a patient with kidney failure, having a willing healthy but incompatible donor, to receive a transplant from a similar pair where the donor is compatible with him. Since in general larger patient-donor pools allow for more patients to be matched, this prompts independent programmes (agents) to merge their pools and collaborate in order to increase the overall number of transplants. Such collaboration does however raise a problem: how to assign transplants to agents so that there is a balance between the contribution each agent brings to the merged pool and the benefit it gets from the collaboration. In this paper we propose a new Integer Programming model for multi-agent kidney exchange programmes (mKEPs). It considers the possible existence of multiple optimal solutions in each matching period of a KEP and, in consecutive matching periods, selects the optimal solution among the set of alternative ones in such a way that in the long-term the benefit each agent gets from participating in the mKEP is balanced accordingly to a given criterion. This is done by use of a memory mechanism. Extensive computational tests show the benefit of mKEPs, when compared to independent KEPs, in terms of potential increase in the number of transplants. Furthermore, they show that, under different policies, the number of additional transplants each agent receives can vary significantly. More importantly, results show that the proposed methodology consistently obtains more stable results than methodologies that do not use memory. © 2020 Elsevier Ltd

2020

Heuristics for Packing Semifluids

Authors
Pedroso, JP;

Publication
CoRR

Abstract

2020

A multi-objective Monte Carlo tree search for forest harvest scheduling

Authors
Neto, T; Constantino, M; Martins, I; Pedroso, JP;

Publication
European Journal of Operational Research

Abstract

2020

Price-and-verify: a new algorithm for recursive circle packing using Dantzig–Wolfe decomposition

Authors
Gleixner, A; Maher, SJ; Mueller, B; Pedroso, JP;

Publication
Annals of Operations Research

Abstract

2020

Compensation Scheme With Shapley Value For Multi-Country Kidney Exchange Programmes

Authors
Biró, P; Gyetvai, M; Klimentova, X; Pedroso, JP; Pettersson, W; Viana, A;

Publication
Proceedings of the 34th International ECMS Conference on Modelling and Simulation, ECMS 2020, Wildau, Germany, June 9-12, 2020 [the conference was canceled because of the coronavirus pandemic, the reviewed papers are published in this volume].

Abstract

Supervised
thesis

2020

Remote Sensing and Machine Learning Tools for Vegetation Monitoring

Author
Sofia Perestrelo de Vasconcelos Cardoso Pereira

Institution
UP-FCUP

2020

Connections and advantages between quantum computing, machine learning, and quantum simulation

Author
Pedro Miguel Miranda Queiroz da Cruz

Institution
UP-FCUP

2019

A data-driven compensation scheme for last-mile delivery with crowdsourcing

Author
Miguel Moreira da Silva Lima Barbosa

Institution
UP-FCUP

2019

An EDSL for Modeling Kidney Exchange Programs

Author
João Paulo Rocha Viana

Institution
UP-FCUP

2019

Domain specific languages for kidney exchange programs

Author
João Viana

Institution
UP-FCUP