Browsing by Author "Freire, Ana"

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  • A data driven framework for mental health states assessment in social platforms
    Ramírez Cifuentes, Diana (Universitat Pompeu Fabra, 2022-07-29)
    The link between mental disorders and social media usage has led researchers to work on the development of automated methods to detect mental health issues in social platforms. This thesis proposes a framework for mental ...
  • Characterization of anorexia nervosa on social media: textual, visual, relational, behavioral, and demographical analysis
    Ramírez Cifuentes, Diana; Freire, Ana; Baeza Yates, Ricardo; Sanz Lamora, Nadia; Álvarez, Aida; González Rodríguez, Alexandre; Lozano Rochel, Meritxell; Llobet Vives, Roger; Velazquez, Diego Alejandro; Gonfaus, Josep Maria; Gonzàlez, Jordi (JMIR Publications, 2021)
    Background: Eating disorders are psychological conditions characterized by unhealthy eating habits. Anorexia nervosa (AN) is defined as the belief of being overweight despite being dangerously underweight. The psychological ...
  • Detection of suicidal ideation on social media: multimodal, relational, and behavioral analysis
    Ramírez Cifuentes, Diana; Freire, Ana; Baeza Yates, Ricardo; Puntí, Joaquim; Medina Bravo, Pilar, 1966-; Alejandro Velazquez, Diego; Gonfaus, Josep Maria; Gonzàlez, Jordi (JMIR Publications, 2020)
    Background: Suicide risk assessment usually involves an interaction between doctors and patients. However, a significant number of people with mental disorders receive no treatment for their condition due to the limited ...
  • Digital competences and social impact: extracurricular learning
    Freire, Ana; Moreno Oliver, Verónica (IATED Academy, 2020)
    The underrepresentation of women in technical degrees is a matter of concern, as it leads to multiple issues such as the lack of diversity and the exclusion of women from the tech industry job market. Several initiatives ...
  • Early risk detection of anorexia on social media
    Ramíırez-Cifuentes, Diana; Mayans Yern, Marc; Freire, Ana (Springer, 2018)
    This paper proposes an approach for the early detection of anorexia nervosa (AN) on social media. We present a machine learning approach that processes the texts written by social media users. This method relies on a set ...
  • Enhanced word embedding variations for the detection of substance abuse and mental health issues on social media writings
    Ramírez Cifuentes, Diana; Largeron, Christine; Tissier, Julien; Baeza Yates, Ricardo; Freire, Ana (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Substance abuse and mental health issues are severe conditions that affect millions. Signs of certain conditions have been traced on social media through the analysis of posts. In this paper we analyze textual cues that ...
  • Enhanced word embeddings for anorexia nervosa detection on social media
    Ramíırez-Cifuentes, Diana; Largeron, Christine; Tissier, Julien; Freire, Ana; Baeza Yates, Ricardo (Springer, 2020)
    Anorexia Nervosa (AN) is a serious mental disorder that has been proved to be traceable on social media through the analysis of users’ written posts. Here we present an approach to generate word embeddings enhanced for ...
  • Graph-based processing of macromolecular information
    Munteanu, Cristian R.; Aguiar Pulido, Vanessa; Freire, Ana; Martínez Romero, Marcos; Porto Pazos, Ana B.; Pereira, Javier; Dorado, Julian (Bentham Science Publishers, 2015)
    The complex information encoded into the element connectivity of a system gives rise to the possibility of graphical processing of divisible systems by using the Graph theory. An application in this sense is the quantitative ...
  • How diverse is the ACII community? Analysing gender, geographical and business diversity of affective computing research
    Hupont, Isabelle; Tolan, Songül; Freire, Ana; Porcaro, Lorenzo; Estevez, Sara; Gómez Gutiérrez, Emilia, 1975- (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    ACII is the premier international forum for presenting the latest research on affective computing. In this work, we monitor, quantify and reflect on the diversity in ACII conference across time by computing a set of indexes. ...
  • Lessons learned in promoting new technologies and engineering in girls through a girls hackathon and mentoring
    Ruiz-Garcia, Aurelio; Subirats, Laia; Freire, Ana (2016)
    The under-representation of women in engineering is becoming a matter of concern as it has implications both for the women themselves and for the development of the digital economy sector. To address this issue, a girls ...
  • Making sense of massive amounts of scientific publications: the scientific knowledge miner project
    Ronzano, Francesco; Freire, Ana; Sáez-Trumper, Diego; Saggion, Horacio (CEUR Workshop Proceedings, 2016)
    The World Wide Web has become the hugest repository ever for scientific publications and it continues to increase at an unprecedented rate. Nevertheless, this information overload makes the exploration of this content a ...
  • Predicting disease severity in multiple sclerosis using multimodal data and machine learning
    Andorrà, Magí; Freire, Ana; Baeza Yates, Ricardo; Villoslada, Pablo (Springer, 2024)
    Background: Multiple sclerosis patients would benefit from machine learning algorithms that integrates clinical, imaging and multimodal biomarkers to define the risk of disease activity. Methods: We have analysed a prospective ...
  • Queuing theory-based latency/Power tradeoff models for replicated search engines
    Freire, Ana; Macdonald, Craig; Tonellotto, Nicola; Ounis, Iadh; Cacheda, Fidel (Graz University of Technology. Institut für Informationssysteme und Computer Medien (IICM), 2015)
    Large-scale search engines are built upon huge infrastructures involvingthousands of computers in order to achieve fast response times. In contrast, the energy consumed (and hence the financial cost) is also high, leading ...
  • Suicide risk assessment on social media: USI-UPF at the CLPsych 2019 shared task
    Ríssola, Esteban A.; Ramíırez-Cifuentes, Diana; Freire, Ana; Crestani, Fabio (ACL (Association for Computational Linguistics), 2019)
    This paper describes the participation of the USI-UPF team at the shared task of the 2019 Computational Linguistics and Clinical Psychology Workshop (CLPsych2019). The goal is to assess the degree of suicide risk of ...
  • Towards suicide prevention: early detection of depression on social media
    Leiva, Víctor; Freire, Ana (Springer, 2017)
    The statistics presented by the World Health Organization inform that 90% of the suicides can be attributed to mental illnesses in high-income countries. Besides, previous studies concluded that people with mental illnesses ...
  • Understanding and leveraging the impact of response latency on user behaviour in web wearch
    Arapakis, Ioannis; Cambazoglu, B. Barla; Freire, Ana (ACM Association for Computer Machinery, 2017)
    The interplay between the response latency of web search systems and users’ search experience has only recently started to attract research attention, despite the important implications of response latency on monetisation ...
  • UPF’s participation at the CLEF eRisk 2018: early risk prediction on the Internet
    Ramíırez-Cifuentes, Diana; Freire, Ana (CEUR Workshop Proceedings, 2018)
    This paper describes the participation of the Web Science and Social Computing Research Group from the Universitat Pompeu Fabra, Barcelona (UPF) at CLEF 2018 eRisk Lab1. Its main goal, di- vided in two different tasks, is ...
  • Wisibilízalas: promoting the role of women in ICT among secondary school students
    Freire, Ana; Ruiz-Garcia, Aurelio; Moreno Oliver, Verónica (ACPI - Academic Conferences and Publishing International Limited, 2018)
    Although technology comprises an important part of our daily life, no matter your gender, women are underrepresented in the overall sector of Information and Communications Technologies (ICT). Among several reasons, the ...

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