Listar Grupos de investigación por autor "Dafonte, Carlos"

Mostrando ítems 1-20 de 52

    • A Blended Artificial Intelligence Approach for Spectral Classification of Stars in Massive Astronomical Surveys 

      Dafonte, Carlos; Rodríguez, Alejandra; Manteiga, Minia; Gómez García, Ángel; Arcay, Bernardino (MDPI AG, 2020-05-01)
      [Abstract] This paper analyzes and compares the sensitivity and suitability of several artificial intelligence techniques applied to the Morgan–Keenan (MK) system for the classification of stars. The MK system is based ...

    • A First Approach to Authentication Based on Artificial Intelligence for Touch-Screen Devices 

      Silvelo, Arturo; Garabato, D.; Santoveña, Raúl; Dafonte, Carlos (MDPI AG, 2020-08-18)
      [Abstract] Most authentication schemes follow a classical approach, where the users are authenticated only once at the beginning of their sessions. Therefore, it is not possible to verify the legitimate use of such a ...

    • A privacy-preserving key transmission protocol to distribute QRNG keys using zk-SNARKs 

      Soler, David; Dafonte, Carlos; Fernández Veiga, Manuel; Fernández Vilas, Ana; Nóvoa, Francisco (Elsevier B.V., 2024-04)
      [Absctract]: High-entropy random numbers are an essential part of cryptography, and Quantum Random Number Generators (QRNG) are an emergent technology that can provide high-quality keys for cryptographic algorithms but ...

    • AI-based user authentication reinforcement by continuous extraction of behavioral interaction features 

      Garabato, D.; Dafonte, Carlos; Santovena, Raul; Silvelo, Arturo; Nóvoa, Francisco; Manteiga, Minia (Springer, 2022-07)
      [Abstract]: In this work, we conduct an experiment to analyze the feasibility of a continuous authentication method based on the monitorization of the users' activity to verify their identities through specific user profiles ...

    • Analysis and Knowledge Discovery by Means of Self-Organizing Maps for Gaia Data Releases 

      Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Manteiga, Minia (Springer, 2016)
      [Abstract]: A billion stars: this is the approximate amount of visible objects estimated to be observed by the Gaia satellite, representing roughly 1 % of the objects in the Galaxy. It constitutes the biggest amount of ...

    • Close Binary Stars in Planetary Nebulae through Gaia EDR3 

      González Santamaría, I.; Manteiga, Minia; Dafonte, Carlos (MDPI, 2021)
      [Abstract] The aim of this work is to search for evidence of close binary stars associated with planetary nebulae (ionized stellar envelopes in expansion) by mining the astronomical archive of Gaia EDR3. For this task, ...

    • CultUnity3D: a Virtual Spatial Ecosystem for Digital Engagement with Cultural Heritage Sites 

      López-Salas, Estefanía; Xuíz García, Adrián; Gómez García, Ángel; Dafonte, Carlos (MDPI, 2020)
      [Abstract] In order to help enhance public outreach and understanding of historical sites, we developed a virtual spatial ecosystem called CultUnity3D. It consists of a set of components specifically implemented within the ...

    • Distributed Fast Self-Organized Maps for Massive Spectrophotometric Data Analysis 

      Dafonte, Carlos; Garabato, D.; Álvarez, M. A.; Manteiga, Minia (MDPI AG, 2018-05-03)
      [Abstract] Analyzing huge amounts of data becomes essential in the era of Big Data, where databases are populated with hundreds of Gigabytes that must be processed to extract knowledge. Hence, classical algorithms must be ...

    • Distributed Fast Self-Organized Maps for Massive Spectrophotometric Data Analysis 

      Dafonte, Carlos; Garabato, D.; Álvarez, M. A.; Manteiga, Minia (MDPI, 2018-11)
      [Abstract]: Analyzing huge amounts of data becomes essential in the era of Big Data, where databases are populated with hundreds of Gigabytes that must be processed to extract knowledge. Hence, classical algorithms must ...

    • Evaluation of a Tracking System for Patients and Mixed Intravenous Medication Based on RFID Technology 

      Martínez Pérez, María; Vázquez González, Guillermo; Dafonte, Carlos (Multidisciplinary Digital Publishing Institute, 2016)
      At present, one of the primary concerns of healthcare professionals is how to increase the safety and quality of the care that patients receive during their stay in hospital. This is particularly important in the administration ...

    • Gaia Data Release 1: Summary of the astrometric, photometric, and survey properties 

      Brown, A. G. A.; Vallenari, A.; Prusti, T.; Bruijne, J. H.J. de; Manteiga, Minia; Álvarez, M. A.; Arcay, Bernardino; Dafonte, Carlos; Garabato, D.; Fustes, D. (EDP Sciences, 2016-11)
      [Abstract]: Context. At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7. Aims. A ...

    • Gaia Data Release 2: Mapping the Milky Way disc kinematics 

      Katz, D.; Manteiga, Minia; Álvarez, M. A.; Arcay, Bernardino; Dafonte, Carlos; Garabato, D. (EDP Sciences, 2018)
      [Abstract] Context. The second Gaia data release (Gaia DR2) contains high-precision positions, parallaxes, and proper motions for 1.3 billion sources as well as line-of-sight velocities for 7.2 million stars brighter than ...

    • Gaia Data Release 2: Observational Hertzsprung-Russell diagrams 

      Babusiaux, C.; Manteiga, Minia; Álvarez, M. A.; Arcay, Bernardino; Dafonte, Carlos; Garabato, D. (EDP Sciences, 2018)
      [Abstract] Context. Gaia Data Release 2 provides high-precision astrometry and three-band photometry for about 1.3 billion sources over the full sky. The precision, accuracy, and homogeneity of both astrometry and photometry ...

    • Gaia Data Release 2: Observations of solar system objects 

      Manteiga, Minia; Spoto, F.; Álvarez, M. A.; Arcay, Bernardino; Dafonte, Carlos; Garabato, D. (EDP Sciences, 2018)
      [Abstract] Context. The Gaia spacecraft of the European Space Agency (ESA) has been securing observations of solar system objects (SSOs) since the beginning of its operations. Data Release 2 (DR2) contains the observations ...

    • Gaia Data Release 2: Summary of the contents and survey properties 

      Brown, A. G. A.; Vallenari, A.; Prusti, T.; Bruijne, J. H.J. de; Babusiaux, C.; Manteiga, Minia; Álvarez, M. A.; Arcay, Bernardino; Dafonte, Carlos; Garabato, D. (EDP Sciences, 2018-08)
      [Abstract]: Context. We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude ...

    • Gaia Data Release 3: Analysis of RVS spectra using the General Stellar Parametriser from spectroscopy 

      Recio-Blanco, A.; Torralba Elipe, Guillermo; Manteiga, Minia; Dafonte, Carlos; Garabato, D.; Gómez García, Ángel; González Santamaría, I.; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo (EDP Sciences, 2023-06)
      [Abstract]: Context. The chemo-physical parametrisation of stellar spectra is essential for understanding the nature and evolution of stars and of Galactic stellar populations. A worldwide observational effort from the ...

    • Gaia Data Release 3: Analysis of the Gaia BP/RP spectra using the General Stellar Parameterizer from Photometry 

      Andrae, R.; Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Gómez García, Ángel; González Santamaría, I.; Manteiga, Minia; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Context. The astrophysical characterisation of sources is among the major new data products in the third Gaia Data Release (DR3). In particular, there are stellar parameters for 471 million sources estimated ...

    • Gaia Data Release 3: Apsis. II. Stellar parameters 

      Fouesneau, M.; Álvarez, M. A.; Garabato, D.; Dafonte, Carlos; Gómez García, Ángel; González Santamaría, I.; Manteiga, Minia; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Context. The third Gaia data release (Gaia DR3) contains, beyond the astrometry and photometry, dispersed light for hundreds of millions of sources from the Gaia prism spectra (BP and RP) and the spectrograph ...

    • Gaia Data Release 3: Apsis. III. Non-stellar content and source classification 

      Delchambre, L.; Garabato, D.; Dafonte, Carlos; Manteiga, Minia; Silvelo, Arturo; Álvarez, M. A.; Gómez García, Ángel; González Santamaría, I.; Pallas-Quintela, Lara; Santoveña, Raúl; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Context. As part of the third Gaia Data Release, we present the contributions of the non-stellar and classification modules from the eighth coordination unit (CU8) of the Data Processing and Analysis Consortium, ...

    • Gaia Data Release 3: Astrophysical parameters inference system (Apsis). I. Methods and content overview 

      Creevey, O. L.; Garabato, D.; Torralba Elipe, Guillermo; Álvarez, M. A.; Dafonte, Carlos; Gómez García, Ángel; González Santamaría, I.; Manteiga, Minia; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo (EDP Sciences, 2023-06)
      [Abstract]: Gaia Data Release 3 contains a wealth of new data products for the community. Astrophysical parameters are a major component of this release, and were produced by the Astrophysical parameters inference system ...