Listar Institute of New Imaging Technologies (INIT) por título

Mostrando ítems 558-577 de 858

    • closedAccess   On the effectiveness of preprocessing methods when dealing with different levels of class imbalance 

      Sánchez Garreta, Josep Salvador; García, Vicente; Mollineda, Ramón A. Elsevier (2012)
      The present paper investigates the influence of both the imbalance ratio and the classifier on the performance of several resampling strategies to deal with imbalanced data sets. The study focuses on evaluating how learning ...

    • closedAccess   On wavelet-based energy densities for spatial point processes 

      D'Ercole, Roberto; Mateu, Jorge Springer (2013-08)
      A spatial point process can be considered a random measure and therefore represented as a countable sum of Delta Dirac measures concentrated at some points of the process. Applying a two-dimensional continuous wavelet ...

    • openAccess   On-axis non-linear effects with programmable Dammann lenses under femtosecond illumination 

      Pérez Vizcaíno, Jorge; Mendoza-Yero, Omel; Borrego Varillas, Rocío; Mínguez-Vega, Gladys; Vázquez de Aldana, Javier R.; Lancis, Jesús Optical Society of America (2013)
      We demonstrate the utilization of Dammann lenses codified onto a spatial light modulator (SLM) for triggering non-linear effects. With continuous wave illumination Dammann lenses are binary phase optical elements that ...

    • openAccess   Online reconstruction-free single-pixel image classification 

      Latorre Carmona, Pedro; Traver Roig, Vicente Javier; Sánchez Garreta, Josep Salvador; Tajahuerce, Enrique Elsevier (2019-04)
      In single-pixel imaging, a series of illumination patterns are projected onto an object and the reflected or transmitted light from the object is integrated by a photodetector (the single-pixel detector). Then, from the ...

    • openAccess   Open City Toolkit: el rol de las ciencias geoespaciales para la realización de ciudades abiertas y participativas 

      Trilles, Sergio; Granell, Carlos; Degbelo, Auriol; Bhattacharya, Devanjan eGeoMapping S.L. (2017)
      En la literatura se distinguen dos enfoques diferentes para la transformación de las actuales ciudades en ciudades inteligentes: (a) ofrecer sistemas más eficientes y autónomos a través del uso de la tecnología, sensores, ...

    • openAccess   Open Source Based Deployment of Environmental Data into Geospatial Information Infrastructures 

      Gil, José; Díaz Sánchez, Laura; Granell, Carlos; Huerta, Joaquin IGI Global (2012)
      Today, scientists use local and closed geospatial solutions to run their models and store their results. This may limit their ability to share their models, and results with other interested colleagues. This scenario ...

    • openAccess   Opening up Smart Cities: Citizen-Centric Challenges and Opportunities from GIScience 

      Degbelo, Auriol; Granell, Carlos; Trilles, Sergio; Bhattacharya, Devanjan; Casteleyn, Sven; Kray, Christian MDPI (2016-02)
      The holy grail of smart cities is an integrated, sustainable approach to improve the efficiency of the city’s operations and the quality of life of citizens. At the heart of this vision is the citizen, who is the primary ...

    • openAccess   Optical characterisation and photothermal conversion efficiency of a water-based carbon nanofluid for direct solar absorption applications. 

      Gimeno Furió, Alexandra; Martinez Cuenca, Raul; Mondragon, Rosa; VELA GASULLA, ANTONIO FABIAN; Doñate-Buendía, Carlos; Mínguez-Vega, Gladys; Hernandez, Leonor Elsevier (2020-12-01)
      Carbon nanoparticles are very useful in solar thermal applications as they absorb much of the solar spectrum and can be inexpensive. Water-based carbon nanofluids with two different concentrations (3 and 33 mg l−1) were ...

    • openAccess   Optical frequency combs generated by acousto-optic frequency-shifting loops 

      Durán, Vicente; guillet de chatellus, hugues; Schnébelin, Come; Kanagaraj, Nithyanandan; Djevarhidjian, Leo; Clement Bellido, Juan; Fernandez-Pousa, Carlos IEEE (2019-12-01)
      A recirculating loop that includes an acousto-optic frequency shifter (AOFS) constitutes a versatile procedure to generate an optical frequency comb (OFC) from a continuous wave (cw) laser. This scheme, implementable with ...

    • closedAccess   Optimal Multicasting in Millimeter Wave 5G NR with Multi-beam Directional Antennas 

      Chukhno, Nadezhda; Chukhno, Olga; Moltchanov, Dmitri; Molinaro, Antonella; Gaidamaka, Yuliya; Samouylov, Konstantin; Koucheryavy, Yevgeni; ARANITI, Giuseppe Institute of Electrical and Electronics Engineers (2021-12)
      The support of multicast communications in the fifth-generation (5G) New Radio (NR) system poses unique challenges to system designers. Particularly, the highly directional antennas do not allow to serve all the user ...

    • openAccess   Optimal Placement of Social Digital Twins in Edge IoT Networks 

      Chukhno, Olga; Chukhno, Nadezhda; ARANITI, Giuseppe; CAMPOLO, Claudia; Iera, Antonio; Molinaro, Antonella MDPI (2020)
      In next-generation Internet of Things (IoT) deployments, every object such as a wearable device, a smartphone, a vehicle, and even a sensor or an actuator will be provided with a digital counterpart (twin) with the aim ...

    • openAccess   Optimal Receivers Location for Passive Indoor Positioning based on BLE 

      De Brouwer, Roald; Torres-Sospedra, Joaquín; Trilles, Sergio; Berkvens, Rafael CEUR Workshop Proceedings (2021-11)
      Indoor Positioning Systems are attracting many researchers, being Bluetooth Low Energy gaining some attention recently. The recent need to track people, ensuring low density of people in some areas, made the research ...

    • openAccess   Optimization of acousto-optic optical frequency combs 

      Kanagaraj, Nithyanandan; Djevarhidjian, Leo; Durán, Vicente; Schnebelin, Come; guillet de chatellus, hugues Optical Society of America (2019)
      Acousto-optic optical frequency combs can easily produce several hundreds of mutually coherent lines from a single laser, by successive frequency shifts in a loop containing an acousto-optic frequency shifter. They combine ...

    • openAccess   Optomechanical Coupling Optimization in Engineered Nanocavities 

      Edelstein, Shulamit; Gomis-Bresco, Jordi; Arregui, Guillermo; Koval, P.; Lanzillotti Kimura, Norberto Daniel; Torrent, Daniel; Sotomayor Torres, Clivia M; García, Pedro David Wiley (2024)
      In optomechanics, the interaction between light and matter is enhanced by engineering cavities where the electromagnetic field and the mechanical displacement are confined simultaneously within the same volume. This leads ...

    • openAccess   Overcoming the barrier of nanoparticle production by femtosecond laser ablation in liquids using simultaneous spatial and temporal focusing 

      Doñate-Buendía, Carlos; Fernández-Alonso, Mercedes; Lancis, Jesús; Mínguez-Vega, Gladys Optical Society of America (2019)
      There exists an increasing demand of industrial-scale production of high-purity ligand-free nanoparticles due to the continuous development of biomedicine, catalysis, and energy applications. In this contribution, a ...

    • openAccess   Parabolicity criteria and characterization results for submanifoldsof bounded mean curvature in model manifolds with weights 

      Hurtado, Ana; Palmer Andreu, Vicente; Rosales, César Elsevier (2020)
      Let P be a submanifold properly immersed in a rotationally symmetric manifold having a pole and endowed with a weight e h. The aim of this paper is twofold. First, by assuming certain control on the h-mean curvature of ...

    • closedAccess   Parabolicity, Brownian Exit Time and Properness of Solitons of the Direct and Inverse Mean Curvature Flow 

      Gimeno, Vicent; Palmer, Vicente (2019-10-05)
      We study some potential theoretic properties of homothetic solitons n of the MCF and the IMCF. Using the analysis of the extrinsic distance function defined on these submanifolds in Rn+m, we observe similarities and ...

    • openAccess   Parallel laser micromachining based on diffractive optical elements with dispersion compensated femtosecond pulses 

      Torres Peiró, Salvador; González Ausejo, Jennifer; Mendoza-Yero, Omel; Mínguez-Vega, Gladys; Andrés, Pedro; Lancis, Jesús Optical Society of America (2013)
      We experimentally demonstrate multi-beam high spatial resolution laser micromachining with femtosecond pulses. The effects of chromatic aberrations as well as pulse stretching on the material processed due to diffraction ...

    • closedAccess   Parallel Single-Pixel Imaging Based on the Talbot Effect 

      Ipus, Erick; Lenz, Armin; Martínez-León, Lluís; Lancis, Jesús; Tajahuerce, Enrique Optica Publishing Group (2023)
      We propose a novel parallel extension of the single-pixel camera based on the Talbot effect by codifying periodic patterns in a fast spatial light modulator (DMD) and using multiple pixels of a 2D sensor array.

    • openAccess   Parametric CAD modeling: An analysis of strategies for design reusability 

      Dorribo Camba, Jorge; Contero, Manuel; Company, Pedro Elsevier (2016-05)
      CAD model quality in parametric design scenarios largely determines the level of flexibility and adaptability of a 3D model (how easy it is to alter the geometry) as well as its reusability (the ability to use existing ...