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    • openAccess   Fabrication by Laser Irradiation in a Continuous Flow Jet of Carbon Quantum Dots for Fluorescence Imaging 

      Doñate-Buendía, Carlos; Torres-Mendieta, Rafael; Pyatenko, Alexander; Falomir, Eva; Fernández Alonso, Mercedes; Mínguez-Vega, Gladys American Chemical Society (2018)
      Fluorescent carbon quantum dots (CQDs) are synthesized by laser irradiation of carbon glassy particles suspended in polyethylene glycol 200 by two methods, a batch and a flow jet configuration. The flow jet configuration ...

    • openAccess   Fabrication of gold nanoparticles in Therminol VP-1 by laser ablation and fragmentation with fs pulses 

      Torres-Mendieta, Rafael; Mondragon, Rosa; Juliá Bolívar, José Enrique; Mendoza-Yero, Omel; Cordoncillo, Eloisa; Lancis, Jesús; Mínguez-Vega, Gladys IOP Science (2014-10-22)
      This letter reports on a physical method to produce highly pure, size-controlled and well-dispersed spherical gold nanoparticles (NPs) in Therminol VP-1 by pulsed laser ablation in liquids (PLAL) using a 30 fs Ti:Sapphire ...

    • openAccess   Fabrication of high stable gold nanofluid by pulsed laser ablation in liquids 

      Torres-Mendieta, Rafael; Mondragon, Rosa; Juliá Bolívar, José Enrique; Mendoza-Yero, Omel; Lancis, Jesús; Mínguez-Vega, Gladys Copyright © 2015 VBRI Press (2015-11)
      Laser ablation in liquids by femtosecond radiation has been used to generate gold nanoparticles in a heat transfer fluid to produce a high stable thermal nanofluid as a heat transfer intensification technique. In oil based ...

    • openAccess   Face gender classification: A statistical study when neutral and distorted faces are combined for training and testing purposes 

      Andreu Cabedo, Yasmina; García-Sevilla, Pedro; Mollineda, Ramón A. Elsevier (2014-01)
      This paper presents a thorough study of gender classification methodologies performing on neutral, expressive and partially occluded faces, when they are used in all possible arrangements of training and testing roles. A ...

    • openAccess   Facile and low-cost fabrication of SiO2-covered Au nanoislands for combined plasmonic enhanced fluorescence microscopy and SERS 

      Vidal, Alejandro; Molina-Prados, Sergio; Cros, Ana; Garro, Nuria; Pérez-Martínez, Manuel; Álvaro, Raquel; Mata Martínez, Gadea; Megías, Diego; Postigo, Pablo A. MDPI (2023-10-08)
      An easy and low-cost way to fabricate monometallic Au nanoislands for plasmonic enhanced spectroscopy is presented. The method is based on direct thermal evaporation of Au on glass substrates to form nanoislands, with ...

    • openAccess   Far-field perfect imaging with time-modulated gratings 

      Packo, Pawel; Torrent, Daniel American Physical Society (2022-06-22)
      We study the capabilities of time-modulated diffraction gratings as imaging devices. It is shown that a time-dependent but transversally homogeneous slab can be used to make a perfect image of an object in the far-field, ...

    • openAccess   Fast compressive Raman bio-imaging via matrix completion 

      Soldevila, Fernando; Dong, Jonathan; Tajahuerce, Enrique; Gigan, Sylvain; Barbosa de Aguiar, Hilton Optical Society of America (2019)
      Raman microscopy is a powerful method combining non-invasiveness with no special sample preparation. Because of this remarkable simplicity, it has been widely exploited in many fields, ranging from life and materials ...

    • closedAccess   Fast Kernel Smoothing of Point Patterns on a Large Network using Two-dimensional Convolution 

      rakshit, suman; Davies, Tilman; Moradi, Mehdi; McSwiggan, Greg; Nair, Gopalan; Mateu, Jorge; Baddeley, Adrian Wiley (2019-06)
      We propose a computationally efficient and statistically principled method for kernel smoothingof point pattern data on a linear network. The point locations, and the network itself, are convolvedwith a two-dimensional ...

    • openAccess   Features Exploration from Datasets Vision in Air Quality Prediction Domain 

      Iskandaryan, Ditsuhi; Ramos, Jose Francisco; Trilles, Sergio MDPI (2021-02-28)
      Air pollution and its consequences are negatively impacting on the world population and the environment, which converts the monitoring and forecasting air quality techniques as essential tools to combat this problem. To ...

    • openAccess   Femtosecond digital lensless holographic microscopy to image biological samples 

      Mendoza-Yero, Omel; Calabuig Barroso, Alejandro; Tajahuerce, Enrique; Lancis, Jesús; Andrés, Pedro; García Sucerquia, Jorge Optical Society of America (2013)
      The use of femtosecond laser radiation in digital lensless holographic microscopy (DLHM) to image biological samples is presented. A mode-locked Ti:Sa laser that emits ultrashort pulses of 12 fs intensity FWHM, with 800 ...

    • openAccess   Femtosecond filamentation in sapphire with diffractive lenses 

      Borrego Varillas, Rocío; Romero, Carolina; Mendoza-Yero, Omel; Mínguez-Vega, Gladys; Gallardo, I.; Vázquez de Aldana, Javier R. Optical Society of America (2013)
      In this paper, we demonstrate novel properties in the phenomenology of supercontinuum generation in sapphire with diffractive lenses and provide a complete spatial, spectral, and temporal characterization of the so-generated ...

    • closedAccess   Femtosecond laser micromachining with extended depth of focus by using diffractive lenses 

      Torres Peiró, Salvador; González Ausejo, Jennifer; Mendoza-Yero, Omel; Mínguez-Vega, Gladys; Lancis, Jesús Elsevier (2014-06-01)
      We show that a simple diffraction focusing element can alleviate mechanical tolerances in ultrafast laser microprocessing. In particular, we experimentally demonstrate that, in comparison with a conventional refractive ...

    • openAccess   Femtosecond laser settings for optimal bracket bonding to zirconia 

      García-Sanz, Verónica; Paredes-Gallardo, Vanessa; Bellot-Arcís, Carlos; Martínez-León, Lluís; Torres-Mendieta, Rafael; Montero, Javier; Albadalejo, Alberto Springer Verlag (2018)
      Bonding orthodontic brackets to ceramic materials is a challenging procedure; femtosecond (FS) laser conditioning could provide improved results, but the ideal settings for effective bracket-zirconia bonding have never ...

    • openAccess   Femtosecond-laser-irradiation-induced structural organization and crystallinity of Bi2WO6 

      Pinatti, Ivo M; Gouveia, Amanda; Doñate-Buendía, Carlos; Mínguez-Vega, Gladys; Longo, Elson Nature Research (2020)
      Controlling the structural organization and crystallinity of functional oxides is key to enhancing their performance in technological applications. In this work, we report a strong enhancement of the structural organization ...

    • openAccess   Filter-Type Variable Selection Based on Information Measures for Regression Tasks 

      Latorre Carmona, Pedro; Martínez Sotoca, José; Pla, Filiberto MDPI AG (2012)
      This paper presents a supervised variable selection method applied to regression problems. This method selects the variables applying a hierarchical clustering strategy based on information measures. The proposed technique ...

    • openAccess   Financial distress prediction using the hybrid associative memory with translation 

      Cleofás Sánchez, Laura; García, Vicente; Marqués Marzal, Ana Isabel; Sánchez Garreta, Josep Salvador Elsevier (2016)
      This paper presents an alternative technique for financial distress prediction systems. The method is based on a type of neural network, which is called hybrid associative memory with translation. While many different ...

    • openAccess   First Dirichlet Eigenvalue and Exit Time Moment Spectra Comparisons 

      Palmer, Vicente; Sarrión-Pedralva, Erik Springer (2023)

    • closedAccess   First- and Second-Order Characteristics of Spatio-Temporal Point Processes on Linear Networks 

      Moradi, Mehdi; Mateu, Jorge American Statistical Association (2019-12-23)
      We present several characteristics for spatio-temporal point patterns when the spatial locations are restricted to a linear network. A nonparametric kernel-based intensity estimator is proposed to highlight the concentration ...

    • closedAccess   Flat-top ultra-wideband photonic filters based on mutual coherence function synthesis 

      Torres Company, Víctor; Lancis, Jesús; Andrés, Pedro Elsevier (2008)
      A novel all-incoherent optical circuit that allows for band-pass microwave-photonic filter design is presented and verified through numerical simulation. In contrast to conventional spectrum-sliced optical architectures ...

    • openAccess   FloU-Net: An Optical Flow Network for Multi-modal Self-Supervised Image Registration 

      Ibáñez Fernández, Damián; Fernández Beltrán, Rubén; Pla, Filiberto Institute of Electrical and Electronics Engineers (2023)
      Image registration is an essential task in image processing, where the final objective is to geometrically align two or more images. In remote sensing, this process allows comparing, fusing or analyzing data, specially ...