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1 to 32 of 32 results
 
  • GeoSRS: a hybrid social recommender system for geolocated data  Open access

     Capdevila, J.; Arias, M.; Arratia, A.
    Information systems
    Vol. 57, p. 111-128
    DOI: 10.1016/j.is.2015.10.003
    Date of publication: 2016-04-01
    Journal article
    Access to the full text
  • Modeling stationary data by a class of generalized Ornstein-Uhlenbeck processes: the Gaussian case.

     Arratia, A.; Cabaña, A.; Cabaña, E. M.
    International Symposium on Intelligent Data Analysis
    p. 13-24
    DOI: 10.1007/978-3-319-12571-8_2
    Presentation's date: 2014-11
    Presentation of work at congresses
  • Gestió i Anàlisi de Dades Complexes

     Balcazar, J. L.; Morrill, G.; Castro, J.; Delgado, J.; Sierra-Santibáñez, J.; Arias, M.; Arratia, A.; Baixeries, J.; Ferrer-i-Cancho, R.; Valentin Fernandez, J.; Hernandez Fernandez, A.; Larriba, J.; Perez-Casany, M.; Prat, A.; Guisado, J.; Martinez, X.; Duarte, A.; Gavaldà, R.
    Competitive project
  • Computational finance: an introductory course with R

     Arratia, A.
    Date of publication: 2014
    Book
    Image
  • Modeling stationary data by classes of generalized Ornstein-Uhlenbeck processes

     Cabaña, A.; Cabaña, E. M.; Arratia, A.
    International Conference of the ERCIM (European Research Consortium for Informatics and Mathematics) Working Group on Computing & Statistics
    p. 44-
    Presentation's date: 2013-12
    Presentation of work at congresses
  • Forecasting with twitter data

     Arias, M.; Arratia, A.; Xuriguera, Ramon
    ACM transactions on intelligent systems and technology
    Vol. 5, num. 1, p. Article No. 8-
    DOI: 10.1145/2542182.2542190
    Date of publication: 2013-12-01
    Journal article
  • First order extensions of residue classes and uniform circuit complexity

     Arratia, A.; Ortiz, C.
    International Workshop on Logic, Language, Information and Computation
    p. 49-63
    DOI: 10.1007/978-3-642-39992-3_8
    Presentation's date: 2013-08
    Presentation of work at congresses
  • A graphical tool for describing the temporal evolution of clusters in financial stock markets

     Arratia, A.; Cabaña, A.
    Computational economics
    Vol. 41, num. 2, p. 213-231
    DOI: 10.1007/s10614-012-9327-x
    Date of publication: 2013-02-01
    Journal article
  • Modeling stationary data by a class of generalised Ornstein-Uhlenbeck processes

     Cabaña, E. M.; Arratia, A.; Cabaña, A.
    International Conference of the ERCIM (European Research Consortium for Informatics and Mathematics) Working Group on Computing & Statistics
    p. 21-
    Presentation's date: 2012-12-02
    Presentation of work at congresses
  • MINERIA EN DATOS BIOLOGICOS Y SOCIALES: ALGORITMOS, TEORIA E IMPLEMENTACION

     Morrill, G.; Quattoni, A.J.; Arratia, A.; B. Balle; Arias, M.; Casas, B.; Bifet, A.C.; Berral, J.; Lopez, J.; Baixeries, J.; Delgado, J.; Belanche, Ll.; Castro, J.; Lozano, A.; Ferrer-i-Cancho, R.; Sierra-Santibáñez, J.; Hernandez Fernandez, A.; Gavaldà, R.
    Competitive project
  • Forecasting financial time series with Twitter

     Xuriguera, Ramon; Arias, M.; Arratia, A.
    International Conference of the ERCIM Working Group on Computing & Statistics
    p. 113
    Presentation's date: 2011-12-19
    Presentation of work at congresses
  • Modelling stationary time series by continuous time processes

     Cabana, Alejandra; Arratia, A.; Cabaña, E. M.
    International Conference of the ERCIM Working Group on Computing & Statistics
    p. 87
    Presentation's date: 2011-12-18
    Presentation of work at congresses
  • Practical challenges that arise when clustering the web using spectral methods

     Arratia, A.; Marijuan, C.
    Jornadas de Matemática Discreta y Algorítmica
    p. 89-100
    Presentation's date: 2010-07-09
    Presentation of work at congresses
  • On the power of deep pushdown stacks  Open access

     Arratia, A.; Stewart, I.
    Acta informatica
    Vol. 46, num. 7, p. 509-531
    DOI: 10.1007/s00236-009-0103-x
    Date of publication: 2009-11
    Journal article
    Access to the full text
  • LARCA

     Lopez, J.; Castro, J.; Bifet, A.C.; Delgado, J.; Morrill, G.; Balcazar, J. L.; Sierra-Santibáñez, J.; Baixeries, J.; Arias, M.; Berral, J.; Quattoni, A.J.; Arratia, A.; B. Balle; Gavaldà, R.
    Competitive project
  • Approximate formulae for a logic that capture classes of computational complexity  Open access

     Arratia, A.; Ortiz, C.
    Logic journal of the IGPL
    Vol. 17, num. 1, p. 131-154
    DOI: 10.1093/jigpal/jzn031
    Date of publication: 2009-02
    Journal article
    Access to the full text
  • SECUENCIAS SIMBOLICAS:ANALISIS,APRENDIZAJE,MINERIA Y EVOLUCION - BARCELONA

     Arratia, A.; Sierra-Santibáñez, J.; Berral, J.; Lozano, A.; Baixeries, J.; Arias, M.; Morrill, G.; Bifet, A.C.; Lopez, J.; Delgado, J.; Ferrer-i-Cancho, R.; Quattoni, A.J.; Gavaldà, R.
    Competitive project
  • Program schemes with deep pushdown storage

     Arratia, A.; Stewart, I.
    Conference on Computability in Europe
    p. 11-21
    DOI: 10.1007/978-3-540-69407-6_2
    Presentation's date: 2008
    Presentation of work at congresses
  • Syntactic approximations to computational complexity classes  Open access

     Arratia, A.; Ortiz, C.
    Conference on Computability in Europe
    p. 1-15
    Presentation's date: 2007-06-18
    Presentation of work at congresses
    Access to the full text
  • Cómo mejorar el PageRank de un árbol

     Arratia, A.; Marijuan, C.
    Jornadas de Matemática Discreta y Algorítmica
    p. 53-60
    Presentation's date: 2006
    Presentation of work at congresses
  • Expressive power and complexity of a logic with quantifiers that count proportions of sets  Open access

     Arratia, A.; Ortiz, C.
    Journal of logic and computation
    Vol. 16, num. 6, p. 817-840
    DOI: 10.1093/logcom/exl011
    Date of publication: 2006
    Journal article
    Access to the full text
  • Counting proportions of sets: expressive power with almost order

     Arratia, A.; Ortiz, C.
    Latin American Theoretical Informatics Symposium
    p. 105-117
    DOI: 10.1007/11682462_14
    Presentation's date: 2006
    Presentation of work at congresses
  • Approximating the expressive power of logics in finite models  Open access

     Arratia, A.; Ortiz, C.
    Latin American Theoretical Informatics Symposium
    p. 540-556
    DOI: 10.1007/b95852
    Presentation's date: 2004
    Presentation of work at congresses
    Access to the full text
  • A note on first-order projections and games  Open access

     Arratia, A.; Stewart, I.
    Theoretical computer science
    Vol. 290, num. 3, p. 2085-2093
    DOI: 10.1016/S0304-3975(02)00491-7
    Date of publication: 2003
    Journal article
    Access to the full text
  • On the descriptive complexity of a simplified game of Hex

     Arratia, A.
    Logic journal of the IGPL
    Vol. 10, num. 2, p. 105-122
    Date of publication: 2002
    Journal article
  • Una presentación uniforme de la Teoría Descriptiva de la Complejidad Computacional

     Arratia, A.
    Acta científica venezolana
    Vol. 53, num. 2, p. 94-118
    Date of publication: 2002
    Journal article
  • Métodos del análisis no-estandar en la Teoría de Modelos Finitos

     Arratia, A.; Ortiz, C.
    Acta científica venezolana
    Vol. 52, num. 2s, p. 2-4
    Date of publication: 2001
    Journal article
  • Introducción a la Teoría Descriptiva de la Computabilidad

     Arratia, A.
    Date of publication: 2000
    Book
  • Hierarchies in classes of program schemes

     Arratia, A.; Stewart, I.; Chauhan, S.
    Journal of logic and computation
    Vol. 9, num. 6, p. 915-957
    Date of publication: 1999
    Journal article
  • Generalized Hex and logical characterizations of polynomial space

     Arratia, A.; Stewart, I.
    Information processing letters
    Vol. 63, num. 3, p. 147-152
    Date of publication: 1997
    Journal article