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Ricardo Gama is Professor at Polytechnic Institute of Viseu. Holds a PhD in Applied Mathematics from University of Porto. He is a researcher at the CISeD Research Centre. Has been involved in several projects and developed work as a technical consultant for several companies. His main field of interest and research is machine learning, particularly in application to discrete optimization problems and recommendation algorithms.
Identification

Personal identification

Full name
Ricardo Luís da Costa Gama

Citation names

  • Gama, Ricardo

Author identifiers

Ciência ID
A414-F53D-A6D7
ORCID iD
0000-0002-7051-8310

Languages

Language Speaking Reading Writing Listening Peer-review
English Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1)
Education
Degree Classification
2013
Concluded
 Doctoral Program in Applied Mathematics (Doutoramento)
Universidade do Porto Faculdade de Ciências, Portugal
"Estabilidade de soluções de inclusões diferenciais via método de medianização" (THESIS/DISSERTATION)
 Aprovado com distinção
2004
Concluded
 Master in Applied Mathematics (Mestrado)
Universidade do Porto Faculdade de Ciências, Portugal
"Estudo Analítico-Numérico do Problema de Difracção por uma Região Elíptica" (THESIS/DISSERTATION)
 Muito Bom
2000
Concluded
 Licenciatura (4-year pre-Bologna degree) in Physics/Applied Mathematics (Licenciatura)
Universidade do Porto Faculdade de Ciências, Portugal
"Anisótropias da radiação cósmica de fundo" (THESIS/DISSERTATION)
 13 valores
Affiliation

Teaching in Higher Education

Category
Host institution 		Employer
2013 - Current Adjunct Teacher (Polytechnic Teacher) Instituto Politécnico de Viseu, Portugal
Instituto Politécnico de Viseu Escola Superior de Tecnologia e Gestão de Lamego, Portugal
2004 - 2013 Invited Assistant (Polytechnic Teacher) Instituto Politécnico de Viseu Escola Superior de Tecnologia e Gestão de Lamego, Portugal
Instituto Politécnico de Viseu Escola Superior de Tecnologia e Gestão de Lamego, Portugal
Projects

Contract

Designation Funders
2022/06/01 - 2025/12/31 Agenda Mobilizadora Green Auto - Sistema de orientação do operador por RV/RA
C644867037-00000013-PPS15
Researcher
Ongoing
2021/07 - 2023/03 InovC+: Ecossitemas de Inovação Inteligente da Região Centro
CENTRO-01-0246-FEDER-000044
Researcher
Concluded
2020/02 - 2022/06 Mini-Olimpíadas Experimentais de Ciência
PROJ/IPV/ ID&I/023
Researcher
Caixa Geral de Depositos
Concluded
2018/10/18 - 2019/04/19 INFO PATHS - Sistema de monitorização e controlo de percursos, de aplicação turístico-social
NORTE-01-0145-FEDER-023623
Researcher
Concluded
2017/04 - 2018/09 Intelligent Tourist Information System for the Douro and Varosa Valley regions
PROJ/CI&DETS/CGD/00017
Principal investigator
Concluded
2016/07/01 - 2018/06/30 Promoting Industry 4.0 in the Region of Trás-os-Montes and Alto Douro ( I4.0@TMAD )
NORTE-46-2016-08
Researcher
Instituto Politécnico de Bragança, Portugal

Associação para o desenvolvimento do Brigantia-EcoPark, Portugal

Instituto Politécnico de Viseu Escola Superior de Tecnologia e Gestão de Lamego, Portugal
Concluded
2011 - 2014 VARIANT - Variational Analysis: Theory and Applications
PTDC/MAT/111809/2009
Researcher
2010 - 2013 ODySSea - Orbital Dynamics of Space Systems
PTDC/CTE-SPA/098030/2008
Researcher
Concluded
Outputs

Publications

Conference paper
  1. Oliveira, Filipa; Carvalho, Maria Paula; Novais, Anabela; Mendes, Cristiana; Abrantes, I.; Gama, Ricardo; Abreu, Maria Conceição; et al. "I Mini-Olimpíadas Experimentais de Ciência.". 2021.
  2. Oliveira, Filipa; Carvalho, Maria Paula; Novais, Anabela; Mendes, Cristiana; Abrantes, I.; Gama, Ricardo; Abreu, Maria Conceição; et al. "A importância das I Miniolimpíadas Experimentais de Ciência na formação científica dos professores do 1.º CEB e na Educação em Ciências.". 2021.
  3. Gama, Ricardo; Fernandes, Hugo. "An attentive RNN model for session-based and context-aware recommendations". 2019.
    10.1145/3359555.3359757
  4. Gama, R.; Smirnov, G.. "Weak exponential stability via averaging and applications". 2012.
  5. Gama, R.; Smirnov, G.. "Partial stability of discontinuous systems via averaging method". 2010.
    10.1063/1.3498514
Journal article
  1. Zhang, Yingqian; Bliek, Laurens; da Costa, Paulo; Refaei Afshar, Reza; Reijnen, Robbert; Catshoek, Tom; Vos, Daniël; et al. "The first AI4TSP competition: Learning to solve stochastic routing problems". Artificial Intelligence 319 (2023): 103918. http://dx.doi.org/10.1016/j.artint.2023.103918.
    10.1016/j.artint.2023.103918
  2. Isabel Vieira; Ricardo Gama; Didiana Fernandes; Isabel Oliveira; Miguel Mota. "Tourism information platform for low-density territories: the Douro region". International Journal of Tourism Policy (2022): http://dx.doi.org/10.1504/ijtp.2022.122237.
    10.1504/ijtp.2022.122237
  3. Gama, Ricardo; L. Fernandes, Hugo. Corresponding author: Gama, Ricardo. "A reinforcement learning approach to the orienteering problem with time windows". Computers & Operations Research 133 (2021): 105357. http://dx.doi.org/10.1016/j.cor.2021.105357.
    10.1016/j.cor.2021.105357
  4. Pedro Lopes; Luís Almeida; João Pinto; Justino de Jesus; Didiana Fernandes; Isabel Vieira; Ricardo Gama. "Open Tourist Information System: a platform for touristic information management and outreach". Information Technology & Tourism (2019): https://doi.org/10.1007/s40558-019-00159-w.
    10.1007/s40558-019-00159-w
  5. Tenreiro Pinto, Joana; Pereira, Frederico C.; Loureiro, Maria C.; Gama, Ricardo; Fernandes, Hugo L.. "Efficacy Analysis of Capsaicin 8% Patch in Neuropathic Peripheral Pain Treatment". Pharmacology 101 5-6 (2018): 290-297. http://dx.doi.org/10.1159/000487444.
    10.1159/000487444
  6. Pinto, J.; Cordeiro, L.; Pereira, C.; Gama, R.; Fernandes, H.L.; Assunção, J.. "Predicting difficult laryngoscopy using ultrasound measurement of distance from skin to epiglottis". Journal of Critical Care 33 (2016): 26-31. http://www.scopus.com/inward/record.url?eid=2-s2.0-84959243421&partnerID=MN8TOARS.
    10.1016/j.jcrc.2016.01.029
  7. Pinto, J.; Cordeiro, L.; Pereira, C.; Gama, R.; Fernandes, H.; Assunção, J.. "Reply to Letter to the Editor". Journal of Critical Care 34 (2016): 133-134. http://www.scopus.com/inward/record.url?eid=2-s2.0-84964267941&partnerID=MN8TOARS.
    10.1016/j.jcrc.2016.03.014
  8. Gama, R.; Smirnov, G.. "Stability and Optimality of Solutions to Differential Inclusions via Averaging Method". Set-Valued and Variational Analysis 22 2 (2014): 349-374. http://www.scopus.com/inward/record.url?eid=2-s2.0-84901011986&partnerID=MN8TOARS.
    10.1007/s11228-013-0261-4
  9. Ricardo Gama; Anna D. Guerman; Ana Seabra; Georgi V. Smirnov. "Averaging Methods for Design of Spacecraft Hysteresis Damper". Mathematical Problems in Engineering 2013 (2013): 1-7. http://dx.doi.org/10.1155/2013/483457.
    10.1155/2013/483457
  10. Gama, R.; Smirnov, G.. "Weak Exponential Stability for Time-Periodic Differential Inclusions via First Approximation Averaging". Set-Valued and Variational Analysis 21 2 (2013): 191-200. http://www.scopus.com/inward/record.url?eid=2-s2.0-84877001301&partnerID=MN8TOARS.
    10.1007/s11228-012-0216-1
  11. Gama, R.; André, N.; Pereira, C.; Almeida, L.; Pinto, P.. "Recommendation algorithm based on random walks in a bipartite graph | Algoritmo de recomendação baseado em passeios aleatórios num grafo bipartido". RISTI - Revista Iberica de Sistemas e Tecnologias de Informacao 2011 8 (2011): 69-73. http://www.scopus.com/inward/record.url?eid=2-s2.0-84912151050&partnerID=MN8TOARS.
  12. Gama, R.; Guerman, A.; Smirnov, G.. "On the asymptotic stability of discontinuous systems analysed via the averaging method". Nonlinear Analysis, Theory, Methods and Applications 74 4 (2011): 1513-1522. http://www.scopus.com/inward/record.url?eid=2-s2.0-78650517129&partnerID=MN8TOARS.
    10.1016/j.na.2010.10.024
  13. Gama, R.; André, N.; Pereira, C.; Almeida, L.; Pinto, P.. "Algoritmo de recomendação baseado em passeios aleatórios num grafo bipartido". RISTI - Revista Iberica de Sistemas e Tecnologias de Informacao 8 1 (2011): 15-24. http://www.scopus.com/inward/record.url?eid=2-s2.0-84857170969&partnerID=MN8TOARS.
  14. Maia, D.J.F.; Gama, R.; Mercier, C.; Pick, M.; Kerdraon, A.; Karlický, M.. "The radio-coronal mass ejection event on 2001 April 15". Astrophysical Journal 660 1 I (2007): 874-881. http://www.scopus.com/inward/record.url?eid=2-s2.0-34249087391&partnerID=MN8TOARS.
    10.1086/508011
Magazine article
  1. Gama, Ricardo; Aibéo, Alexandre; A. Siko; N. André. "Ouvindo o emissor SAQ de Grimeton", Gazeta de Física , 2015
  2. Gama, Ricardo; Aibéo, Alexandre; André, N.. "Construção de recetores rádio como introdução à física das telecomunicações - parte I", Gazeta de Física , 2014
  3. Gama, Ricardo; Aibéo, Alexandre; N. André. "Construção de recetores rádio como introdução à física das telecomunicações - parte II", Gazeta de Física , 2014

Other

Other output
  1. A Reinforcement Learning Approach to the Orienteering Problem with Time Windows. 2020. Gama, Ricardo; Hugo L. Fernandes. https://github.com/mustelideos/optw_rl.
Activities

Oral presentation

Presentation title Event name
Host (Event location)
2021/08/20 A recursive attentive Pointer Network model for the OPSWTW: a reinforcement learning approach DATA SCIENCE MEETS OPTIMISATION workshop @ IJCAI-2021
(Canada)
2014/04 On the averaging method for differential inclusions and applications 2.nd Workshop on Variational Analysis and Applications
University of Minho (Portugal)
2012/03 Weak Exponential Stability via Averaging Method and Applications 1st IAA Conference on Dynamics and Control of Space Systems
2011/08/28 On the averaging for differential inclusions Workshop on Variational Analysis and Applications
University of Évora (Évora, Portugal)
Distinctions

Award

2021 2nd Place - AI4TSP Competition - IJCAI 2021
2018 1st Place - Pover -t Test Challenge
World Bank, United States

Other distinction

2020 Kaggle Competitions Master - https://www.kaggle.com/ricgama
Kaggle, United States