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Mostrando ítems 395-414 de 743

    • openAccess   Laser and electron beam-induced formation of Ag/Cr structures on Ag2CrO4 

      Lemos, Pablo; Silva, G. S.; Roca, R. A.; Assis, Marcelo de; Torres-Mendieta, Rafael; Beltrán Mir, Héctor; Mínguez-Vega, Gladys; Cordoncillo, Eloisa; Andres, Juan; Longo, Elson Royal Society of Chemistry (2019)
      The interactions of silver chromate (Ag2CrO4) with a femtosecond (fs) laser and electron beam irradiations were investigated. For the first time, the growth and coalescence of metallic Ag nanoparticles (NPs) on an Ag2CrO4 ...

    • closedAccess   Laser-induced formation of bismuth nanoparticles 

      Assis, Marcelo de; Cordoncillo, Eloisa; Torres-Mendieta, Rafael; Beltrán Mir, Héctor; Mínguez-Vega, Gladys; Gouveia, Amanda; Leite, Edson; Andres, Juan; Longo, Elson Royal Society of Chemistry (2018)
      In the current communication, the synthesis of metallic Bi nanoparticles with coexisting crystallographic structures (rhombohedral, monoclinic, and cubic) obtained via direct femtosecond laser irradiation of NaBiO3 is ...

    • openAccess   Laser/Electron Irradiation on Indium Phosphide (InP) Semiconductor: Promising Pathways to In Situ Formation of Indium Nanoparticles 

      Assis, Marcelo de; Guerra Macedo, Nadia; Machado, Thales Rafael; Ferrer, Mateus M.; Gouveia, Amanda; Cordoncillo, Eloisa; Torres-Mendieta, Rafael; Beltrán Mir, Héctor; Mínguez-Vega, Gladys; Leite, Edson R.; Sambrano, Julio; Andres, Juan; Longo, Elson Wiley (2018)
      In the current study, whether femtosecond laser and electron beam irradiation of indium phosphide (InP) are “green,” fast, and effective methods to produce metallic In nanoparticles is probed. High-resolution transmission ...

    • openAccess   Latent topic-based super-resolution for remote sensing 

      Fernandez-Beltran, Ruben; Latorre Carmona, Pedro; Pla, Filiberto Taylor & Francis (2017)
      This letter presents a novel single-image Super-Resolution (SR) approach based on latent topics specially designed to remote sensing imagery. The proposed approach pursues to super-resolve topics uncovered from ...

    • openAccess   Latent Topics-based Relevance Feedback for Video Retrieval 

      Fernandez-Beltran, Ruben; Pla, Filiberto Elsevier (2015)
      This paper presents a novel Content-Based Video Retrieval approach in order to cope with the semantic gap challenge by means of latent topics. Firstly, a supervised topic model is proposed to transform the classical retrieval ...

    • openAccess   Learning First Aid with a Video Game 

      Rebollo Santamaría, Cristina; Gasch, Cristina; Remolar, Inmaculada; Delgado Gomis, Daniel MDPI (2021-12-02)
      Any citizen can be involved in a situation that requires basic first aid knowledge. For this reason, it is important to be trained in this kind of activity. Serious games have been presented as a good option to integrate ...

    • openAccess   Learning History Using Virtual and Augmented Reality 

      Remolar, Inmaculada; Rebollo Santamaría, Cristina; Fernández Moyano, Jon Andoni MDPI (2021-11-08)
      Master lectures of history are usually quite boring for the students, and to keep their attention requires a great effort from teachers. Virtual and Augmented Reality have a clear potential in education and can solve this ...

    • openAccess   Leveraging Container Technologies in a GIScience Project: A Perspective from Open Reproducible Research 

      Benito, Pedro J; Trilles, Sergio; Navarro-Carrión, José T. MDPI (2020-02-20)
      Scientific reproducibility is essential for the advancement of science. It allows the results of previous studies to be reproduced, validates their conclusions and develops new contributions based on previous research. ...

    • openAccess   Leveraging electronic healthcare record standards and semantic web technologies for the identification of patient cohorts 

      Fernández-Breis, Jesualdo Tomás; Maldonado, Jose Alberto; Marcos, Mar; Legaz-García, María del Carmen; Moner, David; Torres-Sospedra, Joaquín; Esteban-Gil, Ángel; Martínez-Salvador, Begoña; Robles, Montserrat American Medical Informatics Association (2013)
      Background The secondary use of electronic healthcare records (EHRs) often requires the identification of patient cohorts. In this context, an important problem is the heterogeneity of clinical data sources, which can be ...

    • openAccess   Lightweight Wi-Fi Fingerprinting with a Novel RSS Clustering Algorithm 

      Quezada Gaibor, Darwin; Torres-Sospedra, Joaquín; Nurmi, Jari; Koucheryavy, Yevgeni; Huerta, Joaquin IEEE (2021-11-29)
      Nowadays, several indoor positioning solutions sup-port Wi-Fi and use this technology to estimate the user position. It is characterized by its low cost, availability in indoor and outdoor environments, and a wide variety ...

    • openAccess   Local inhomogeneous second-order characteristics for spatio-temporal point processes occurring on linear networks 

      D'ANGELO, Nicoletta; adelfio, giada; Mateu, Jorge Springer (2022)
      Point processes on linear networks are increasingly being considered to analyse events occurring on particular network-based structures. In this paper, we extend Local Indicators of Spatio-Temporal Association (LISTA) ...

    • openAccess   Long-Term Analyses of the Rate of Perceived Exertion as an Indicator of Intensity in Women’s Basketball during a Relegation Play-off 

      Batalla Gavaldà, Abraham; Beltran-Garrido, Jose Vicente; Garrosa Martín, Gerson; Cecília-Gallego, Pau; Montoliu Colás, Raul; Corbi, Francisco MDPI (2022-11)
      Knowledge of internal load is essential to understand the effect of training and competition on athletes. The aim of this study was to analyse the validity of the rate of perceived exertion (RPE) scale as an indicator of ...

    • openAccess   Long-Term WiFi Fingerprinting Dataset for Research on Robust Indoor Positioning 

      Mendoza-Silva, Germán Martín; Richter, Philipp; Torres-Sospedra, Joaquín; Lohan, Elena Simona; Huerta, Joaquin MDPI (2018-01-16)
      WiFi fingerprinting, one of the most popular methods employed in indoor positioning, currently faces two major problems: lack of robustness to short and long time signal changes and difficult reproducibility of new methods ...

    • openAccess   Looking for “in-between” Places 

      Portela, Manuel; Acedo Sánchez, Albert; Granell, Carlos Media Theory (2018)
      This article develops the concept of “in-between” places in relation to the study of language, perceptions and memorieswithin the broader mediation of cartography. We held an empirical qualitative studyin the city of ...

    • closedAccess   Loss compensation in time-dependent elastic metamaterials 

      Torrent, Daniel; Parnell, William J.; Norris, Andrew N. American Physical Society (2018)
      Materials with properties that are modulated in time are known to display wave phenomena showing energy increasing with time, with the rate mediated by the modulation. Until now there has been no accounting for ...

    • openAccess   Low-cost single-pixel 3D imaging by using an LED array 

      Salvador Balaguer, Eva; Latorre Carmona, Pedro; Chabert, Carlos; Pla, Filiberto; Lancis, Jesús; Tajahuerce, Enrique Optical Society of America (2018)
      We propose a method to perform color imaging with a single photodiode by using light structured illumination generated with a low-cost color LED array. The LED array is used to generate a sequence of color Hadamard ...

    • openAccess   Low-High-Power Consumption Architectures for Deep-Learning Models Applied to Hyperspectral Image Classification 

      Haut, Juan M.; Bernabé, Sergio; Paoletti, Mercedes Eugenia; Fernandez-Beltran, Ruben; Plaza, Antonio; Plaza, Javier IEEE (2018-11)
      Convolutional neural networks have emerged as an excellent tool for remotely sensed hyperspectral image (HSI) classification. Nonetheless, the high computational complexity and energy requirements of these models typically ...

    • closedAccess   Lp-calculus Approach to the Random Autonomous Linear Differential Equation with Discrete Delay 

      Calatayud, Julia; Cortés, Juan Carlos; Jornet, Marc Springer Nature Switzerland AG (2019-06-19)
      In this paper, we provide a full probabilistic study of the random autonomous linear differential equation with discrete delay τ > 0: x (t) = ax(t) + bx(t − τ ), t ≥ 0, with initial condition x(t) = g(t), −τ ≤ t ≤ 0. ...

    • openAccess   Machine learning assisted intelligent design of meta structures: a review 

      He, Liangshu; Li, Yan; Torrent, Daniel; Zhuang, Xiaoying; Rabczuk, Timon; Jin, Yabin OAE Publishing (2023-10)
      In recent years, the rapid development of machine learning (ML) based on data-driven or environment interaction has injected new vitality into the field of meta-structure design. As a supplement to the traditional ...

    • openAccess   Majorana-like Zero Modes in Kekulé Distorted Sonic Lattices 

      Gao, Penglin; Torrent, Daniel; Cervera, Francisco; San-Jose, Pablo; Sánchez-Dehesa, José; Christensen, Johan American Physical Society (2019)
      Topological phases have recently been realized in bosonic systems. The associated boundary modes between regions of distinct topology have been used to demonstrate robust waveguiding, protected from defects by the topology ...