Research

Publications

Journal Articles

• Alcacer, Aleix and Epifanio, Irene (2026). Comparative Insights: Fuzzy Clustering Versus Archetypal Analysis in Vector Quantisation for Blosc2. Electronics Letters, 62(1). 10.1049/ell2.70555
• Alcacer, Aleix and Epifanio, Irene (2024). Outlier detection of clustered functional data with image and signal processing applications by archetype analysis. PLOS ONE. 10.1371/journal.pone.0311418
  2024 JIF: 2.6 (Q2 in Multidisciplinary Sciences)
• Alcacer, Aleix and Epifanio, Irene and Gual-Arnau, Ximo (2024). Biarchetype Analysis: Simultaneous Learning of Observations and Features Based on Extremes. IEEE Transactions on Pattern Analysis and Machine Intelligence. 10.1109/TPAMI.2024.3400730
  2024 JIF: 18.6 (Q1 in Computer Science, Artificial Intelligence)
• Alcacer, Aleix and Epifanio, Irene and Martinez-Garcia, Marina (2024). Ordinal classification for interval-valued data and interval-valued functional data. Expert Systems with Applications, 238. 10.1016/j.eswa.2023.122277
  2024 JIF: 7.5 (Q1 in Computer Science, Artificial Intelligence)
• Alcacer, Aleix and Epifanio, Irene and Valero, Jorge and Ballester, Alfredo (2021). Combining Classification and User-Based Collaborative Filtering for Matching Footwear Size. MATHEMATICS, 9(7). 10.3390/math9070771
  2021 JIF: 2.592 (Q1 in Mathematics)
• Alcacer, Aleix and Epifanio, Irene and Ibáñez, María Victoria and Simó, Amelia and Ballester, Alfredo (2020). A data-driven classification of 3D foot types by archetypal shapes based on landmarks. PLOS ONE, 15(1). 10.1371/journal.pone.0228016
  2020 JIF: 3.24 (Q2 in Multidisciplinary Sciences)

Book Chapters

• Alcacer, Aleix and Epifanio, Irene (2026). Representing asymmetric relationships by h-plots. Discovering the archetypal patterns of cross-journal citation relationships. In Analysis of asymmetric relationships: Case studies (Behaviormetrics: Quantitative Approaches to Human Behavior). Springer. 10.48550/arXiv.2601.05400
• Alcacer, Aleix and Epifanio, Irene (2026). Archetypal cases for questionnaires with nominal multiple choice questions. In Statistical Methods for Data Analysis and Decision Sciences (Italian Statistical Society Series on Advances in Statistics). Springer. 10.48550/arXiv.2601.05392

Conference Presentations & Talks

• Alcacer, Aleix and Epifanio, Irene (August 23, 2025). Representing asymmetric relationships by h-plots. Discovering the archetypal patterns of cross-journal citation relationships. 108 Symposium of the Behaviormetric Society, Tokyo (Japan).
  Invited presentation
• Alcacer, Aleix and Epifanio, Irene (August 23, 2025). Fair archetypal analysis for fair representation. 8th International Conference on Econometrics and Statistics, Tokyo (Japan).
  CERTIFICATE
• Alcacer, Aleix and Epifanio, Irene (April 3, 2025). Archetypal cases for questionnaires with nominal multiple choice questions. Third Conference of the Statistics and Data Science Group of the Italian Statistical Society, Milan (Italy).
• Alcacer, Aleix and Epifanio, Irene (November 21, 2024). Análisis de biarquetipos en R. LatinR 2024, Online.
  VIDEO
• Alcacer, Aleix and Martínez Garcia, Marina and McNamee, Daniel and Kaplan, Raphael (August 6, 2023). Relational Episodic Inference for Fictive Planning. Cognitive Computational Neuroscience, Oxford (United Kingdom).
• Alcacer, Aleix and Epifanio, Irene (June 20, 2022). Discovering archetypal football teams and stats with biarchetype analysis. useR! 2022 The R User Conference, Online (USA).
  CERTIFICATE
• Alcacer, Aleix and Epifanio, Irene and Valero, Jorge and Ballester, Alfredo (December 19, 2021). Combining user-based collaborative filtering and classification for matching footwear size. CFE-CMStatistics 2021, London (United Kingdom).
  Invited presentation
  CERTIFICATE
• Alcacer, Aleix and Epifanio, Irene (January 27, 2021). Analysis of gene expression data using biarchetype analysis. V Jornadas Científicas de Estudiantes de la SEB, València (Spain).
  CERTIFICATE
• Alcacer, Aleix and Epifanio, Irene (December 19, 2020). Biarchetype analysis: definition and application to sports analysis. 3rd BYMAT Conference, València (Spain).
  CERTIFICATE
• Alcacer, Aleix and Epifanio, Irene and Ibáñez, María Victoria and Simó, Amelia and Ballester, Alfredo (July 19, 2020). What are the types of Spanish foot shapes? Archetypoid analysis of 3D images. 2020 Virtual International Biometric Conference, Seúl (South Korea).
  CERTIFICATE
• Alcacer, Aleix and Epifanio, Irene and Ibáñez, María Victoria and Simó, Amelia and Ballester, Alfredo (January 27, 2020). A data-driven classification of 3D foot types by archetypal shapes based on landmarks. V Congreso de Jóvenes Investigadores de la RSME, Castelló de la Plana (Spain).
  CERTIFICATE
• Alcacer, Aleix and Epifanio, Irene and Ibáñez, María Victoria and Simó, Amelia (September 11, 2019). Archetypal contour shapes. 12th Scientific Meeting Classification and Data Analysis Group (CLADAG 2019), Cassino (Italy).
  Invited presentation
  CERTIFICATE
• Alcacer, Aleix and Epifanio, Irene and Ibáñez, María Victoria and Simó, Amelia (June 19, 2019). Analysis of 2D foot morphology by functional archetypal analysis. XVII Conferencia Española y VII Encuentro Iberoamericano de Biometría (CEB-EIB 2019), València (Spain).
  Invited presentation. Selected for the Young Statician Showcase
  CERTIFICATE

Research Stays

• Technical University of Denmark (DTU), Lyngby, Denmark (Oct 2024 - Dec 2024)
  Host: Morten Mørup
  Collaborated on extending archetypal analysis to n-dimensional tensors. Developed novel algorithms for multi-way data decomposition.
• Technical University of Denmark (DTU), Lyngby, Denmark (Oct 2023 - Dec 2023)
  Host: Morten Mørup
  Collaborated on extending archetypal analysis to n-dimensional tensors. Developed novel algorithms for multi-way data decomposition.
• Blosc Development Team, Castelló de la Plana, Spain (Feb 2021 - Sept 2021)
  Host: Francesc Alted
  Developed two compression codecs for Blosc2 using archetypal analysis and fuzzy k-means clustering. Optimized performance for scientific data compression.

Research Projects

• CIPROM/2023/66 (2024-2028)
  Statistical learning methods based on archetypal analysis and applications in science and technology
  Funder: PROMETEO, Conselleria de Educación, Universidades y Empleo
  Role: Team member
• PID2022-141699NB-I00 (2023-2026)
  Desarrollo de técnicas de aprendizaje estadístico y redes neuronales a la variedad de Riemann del espacio de la forma tridimensional. Aplicaciones en biomecánica
  Funder: Agencia Estatal de Investigación
  Role: Team member
• PID2021-122338NA-I00 (2022-2026)
  Memoria episódica en el mundo prosocial
  Funder: Agencia Estatal de Investigación
  Role: Team member
• PID2020-118763GA-I00 (2021-2026)
  Estudio de la neuroplasticidad en el aprendizaje de resolución de problemas aritmético-algebraicos con error de inversión
  Funder: Agencia Estatal de Investigación
  Role: Team member
• UJI-B2020-22 (2021-2023)
  Aprenentatge estadístic per big data. aplicacions en indústria i medicina
  Funder: Universitat Jaume I
  Role: Team member
• DPI2017-87333-R (2018-2021)
  Procedimientos de big data para la asignación de talla de calzado en venta online con información antropométrica 3D
  Funder: Ministerio de Economía, Industria y Competitividad
  Role: Team member
• UJI-B2017-13 (2018-2021)
  Aprenentatge estadístic en problemes de big data aplicat a la determinació de la talla de roba en infants
  Funder: Universitat Jaume I
  Role: Team member

Service

• Reviewer for Elsevier journals