Departament d'Estadística i Investigació Operativa

Recent Submissions

  • Location routing problems on trees 

    Aráoz Durand, Julián Arturo; Fernández Aréizaga, Elena; Rueda, Salvador (2019-04-30)
    Article
    Restricted access - publisher's policy
    This paper addresses combined location/routing problems defined on trees, where not all vertices have to be necessarily visited. A mathematical programming formulation is presented, which has the integrality property. The ...

  • Fusing mobile phone data with other data sources to generate input OD matrices for transport models 

    Montero Mercadé, Lídia; Ros-Roca, Xavier; Herranz, Ricardo; Barceló Bugeda, Jaime (Elsevier, 2019)
    Article
    Open Access
    OD matrices that describe mobility patterns provide major input to most transport analysis models. Since OD matrices are not yet directly observable, they are usually estimated indirectly. Data from new sources such as ...

  • A new approach for sizing trials with composite binary endpoints using anticipated marginal values and accounting for the correlation between components 

    Bofill Roig, Marta; Gómez Melis, Guadalupe (2019-05-20)
    Article
    Restricted access - publisher's policy
    Composite binary endpoints are increasingly used as primary endpoints in clinical trials. When designing a trial, it is crucial to determine the appropriate sample size for testing the statistical differences between ...

  • Mortality of NBA Players: risk factors and comparison with the general US population 

    Martínez García, Jose Antonio; Langohr, Klaus; Felipo, Julián; Casals Toquero, Martí (2019-02)
    Article
    Open Access
    Concerns have been raised recently by players’ associations regarding the risk of death among retired players. Using a retrospective cohort study, we analyzed factors associated with the mortality of National Basketball ...

  • Longer residence of ecuadorian and colombian migrant workers in Spain associated with new episodes of common mental disorders 

    Ronda Pérez, Elena; Martínez Martínez, José Miguel; Reid, Alison; Agudelo Suárez, Andrés A. (2019-06-01)
    Article
    Open Access
    The healthy migrant effect and its impact on mental health has been reported in the general population of many countries. Information is limited about its impact on working populations. The aim of this study is to estimate ...

  • The effects of lithium sulfur battery ageing on second-life possibilities and environmental life cycle assessment studies 

    Wolff, Deidre; Canals Casals, Lluc; Benveniste Pérez, Gabriela; Corchero García, Cristina; Trilla Romero, Lluís (2019-01-01)
    Article
    Open Access
    The development of Li-ion batteries has enabled the re-entry of electric vehicles into the market. As car manufacturers strive to reach higher practical specific energies (550 Wh/kg) than what is achievable for Li-ion ...

  • Development and enhancement of inclusion services at higher education level 

    Josa i Culleré, Irene; Farré Tost, Carles; Gálvez Carrillo, Maria Immaculada; Ferrer Balas, Dídac; Vilalta Porta, Montserrat; Montero Mercadé, Lídia (International Association of Technology, Education and Development (IATED), 2019)
    Conference report
    Open Access
    Everyone is unique in their own way and it is necessary to embrace this diversity and make positive use of it. At all levels of education, differences between students can provide a good learning opportunity since every ...

  • What does a zero mean? understanding false, random and structural zeros in ecology 

    Blasco Moreno, Anabel; Pérez Casany, Marta; Puig, Pedro; Morante, Maria; Castells, Eva (2019-03-27)
    Article
    Restricted access - publisher's policy
    1. Zeros (i.e. events that do not happen) are the source of two common phenomena in count data: overdispersion and zero-inflation. Zeros have multiple origins in a dataset: false zeros occur due to errors in the experimental ...

  • PRESISTANT: Learning based assistant for data pre-processing 

    Bilalli, Besim; Abelló Gamazo, Alberto; Aluja Banet, Tomàs; Wrembel, Robert (Elsevier, 2019-08-17)
    Article
    Restricted access - publisher's policy
    Data pre-processing is one of the most time consuming and relevant steps in a data analysis process (e.g., classification task). A given data pre-processing operator can have positive, negative, or zero impact on the final ...

  • Oral health-related quality of life in native and immigrant populations in the PELFI study in Spain 

    Agudelo Suárez, Andrés A.; Vivares Builes, Annie M.; Muñoz Pino, Natalia; Martínez Martínez, José Miguel; Reid, Alison; Ronda Pérez, Elena (2019-05-21)
    Article
    Open Access
    Quality of life and its relationship to oral health is an important consideration in the determinants of health of vulnerable groups. The aim of this study is to assess oral health-related quality of life (OHRQoL) and its ...

  • ¿Aprenden sostenibilidad los alumnos de la FIB? 

    Sánchez Carracedo, Fermín; Sabaté i Garriga, Ferran; Gibert, Karina (Asociación de Enseñantes Universitarios de la Informática (AENUI), 2019)
    Conference report
    Open Access
    En este artículo se presenta un estudio realizado para averiguar si los estudiantes de la FIB aprenden sostenibilidad a lo largo de sus estudios en la universidad. Se usa como herramienta el cuestionario de sostenibilidad ...

  • Public entities driven robotic innovation in urban areas 

    Puig-Pey Clavería, Ana María; Bolea Monte, Yolanda; Grau Saldes, Antoni; Casanovas Garcia, Josep (2017-03)
    Article
    Open Access
    Cities present new challenges and needs to satisfy and improve lifestyle for their citizens under the concept “Smart City”. In order to achieve this goal in a global manner, new technologies are required as the robotic ...

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