Listar Institute of New Imaging Technologies (INIT) por título

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    • openAccess   Towards Ubiquitous Indoor Positioning: Comparing Systems across Heterogeneous Datasets 

      Torres-Sospedra, Joaquín; Silva, Ivo; Klus, Lucie; Quezada Gaibor, Darwin; Crivello, Antonino; Barsocchi, Paolo; Pendão, Cristiano; Lohan, Elena Simona; Nurmi, Jari; Moreira, Adriano IEEE (2021-11-29)
      The evaluation of Indoor Positioning Systems (IPSs) mostly relies on local deployments in the researchers’ or partners’ facilities. The complexity of preparing comprehensive experiments, collecting data, and considering ...

    • openAccess   Towns Conquer : A Gamified application to collect geographical names (vernacular names/toponyms) 

      Castellote, Jesús; Huerta, Joaquin; Pescador, Javier; Brown, Michael AGILE (2013)
      The traditional model for geospatial crowd sourcing asks the public to use their free time collecting geospatial data for no obvious reward. This model has shown to work very well on projects such as Open ...

    • openAccess   TrackInFactory: A Tight Coupling Particle Filter for Industrial Vehicle Tracking in Indoor Environments 

      Silva, Ivo; Pendão, Cristiano; Torres-Sospedra, Joaquín; Moreira, A Institute of Electrical and Electronics Engineers (2021-07-06)
      Localization and tracking of industrial vehicles have a key role in increasing productivity and improving the logistics processes of factories. Due to the demanding requirements of industrial vehicle tracking and navigation, ...

    • openAccess   Training Engineers in the Use of Constraints to Create Quality 2D Pro les for 3D Models 

      Plumed, Raquel; González-Lluch, Carmen; Otey, Jeffrey; Pérez-Belis, Victoria CAD Solutions (2021)
      Historically, different strategies utilized in engineering and technical graphics reflect growing concern about improvement in CAD instruction and the introduction of product quality data in curricular activities. Our ...

    • openAccess   Transfer Deep Learning for Remote Sensing Datasets: A Comparison Study 

      Hernandez-Sequeira, Itza; Fernandez-Beltran, Ruben; Pla, Filiberto IEEE (2022-07-17)
      Remote sensing is also benefiting from the quick development of deep learning algorithms for image analysis and classification tasks. In this paper, we evaluate the classification performance of a well-known Convolutional ...

    • openAccess   Transfer Learning for Convolutional Indoor Positioning Systems 

      Klus, Roman; Klus, Lucie; Talvitie, Jukka; Pihlajasalo, Jaakko; Torres-Sospedra, Joaquín; Valkama, Mikko IEEE (2021-11-29)
      Fingerprinting is a widely used technique in indoor positioning, mainly due to its simplicity. Usually, this technique is used with the deterministic k - Nearest Neighbors (k-NN) algorithm. Utilizing a neural network model ...

    • closedAccess   Trivariate non‐Gaussian copulas to analyze the spatial behavior of rat sightings 

      Ayyad, Carlos; Mateu, Jorge; Omidi, Mohammad; Tamayo Uria, Ibon; Mohammadzadeh, Mohsen Wiley (2018)
      The brown rat lives with man in a wide variety of environmental contexts and adversely affects public health by transmission of diseases, bites, and allergies. Understanding behavioral and spatial correlation aspects of ...

    • openAccess   Tsallis entropy for geometry simplification 

      Castelló Boscá, Pascual; González, Carlos; Sbert Casasayas, Mateu; Feixas, Miguel; Chover, Miguel MDPI Publishing (2011-09-29)
      This paper presents a study and a comparison of the use of different information-theoretic measures for polygonal mesh simplification. Generalized measures from Information Theory such as Havrda–Charva ́t–Tsallis entropy ...

    • openAccess   TUJI1 Dataset: Multi-device dataset for indoor localization with high measurement density 

      Klus, Lucie; Klus, Roman; Lohan, Elena Simona; Nurmi, Jari; Granell, Carlos; Valkama, Mikko; Talvitie, Jukka; Casteleyn, Sven; Torres-Sospedra, Joaquín Elsevier (2024-03-22)
      Positioning in indoor scenarios using signals of opportunity is an effective solution enabling accurate and reliable performance in Global Navigation Satellite System (GNSS)-obscured scenarios. Despite the availability of ...

    • openAccess   Tunable telephoto: governable Fourier spectrum anamorphic scaling 

      Gomez-Sarabia, Cristina Margarita; Tajahuerce, Enrique; Ojeda-Castaneda, Jorge (2021-02-18)
      We discuss the Gaussian design of a device that controls the scale, in an anamorphic fashion, of Fraunhofer diffraction patterns. The device uses two pairs of varifocal cylindrical lenses. For spherical lenses, the optical ...

    • closedAccess   Two-level classifier ensembles for credit risk assessment 

      Marqués Marzal, Ana Isabel; García, Vicente; Sánchez Garreta, Josep Salvador Elsevier (2012)
      Many techniques have been proposed for credit risk assessment, from statistical models to artificial intelligence methods. During the last few years, different approaches to classifier ensembles have successfully been ...

    • openAccess   Two-stage procedure based on smoothed ensembles of neural networks applied to weed detection in orange groves 

      Torres-Sospedra, Joaquín; Nebot Roglá, Patricio Elsevier (2014-07)
      The potential impacts of herbicide utilization compel producers to use new methods of weed control. The problem of how to reduce the amount of herbicide and yet maintain crop production has stimulated many researchers to ...

    • openAccess   Two-way layout factorial experiments of spatial point pattern responses in mineral flotation 

      González, Jonatan A.; Lagos Álvarez, Bernardo M.; Mateu, Jorge Springer (2021-03-25)
      Factorial experiments are well-understood when the given observations are outcomes of random variables. However, when we observe spatial point patterns in each combination of factors cells, the methodology is much less ...

    • openAccess   UJI Probes: dataset of Wi-Fi probe requests 

      Bravenec, Tomáš; Torres-Sospedra, Joaquín; Gould, Michael; Fryza, Tomas IEEE (2023-12-06)
      This paper focuses on the creation of a new, publicly available Wi-Fi probe request dataset. Probe requests belong to the family of management frames used by the 802.11 (Wi-Fi) protocol. As the situation changes year by ...

    • openAccess   UJI Smart Campus: Un ejemplo de integración de recursos en la Universitat Jaume I de Castelló 

      Benedito-Bordonau, Mauri; Gargallo, Diego; Avariento, Joan; Sanchis, Ana; Gould, Michael; Huerta, Joaquin Centro Nacional de Información Geográfica (2013-11)
      UJI Smart Campus es un visor web basado en mapas, que usa tecnologías ESRI y que permite localizar áreas de interés y consultar información útil. Diseñado como un sitio web, sigue las directrices de modelos responsive para ...

    • openAccess   UJI Smart Venues: Gestión de eventos en la Universitat Jaume I de Castelló 

      Avariento, Joan; Rambla Risueño, David; Sanchis, Ana; Gargallo, Diego; Benedito-Bordonau, Mauri; Torres-Sospedra, Joaquín; Huerta, Joaquin Centro Nacional de Información Geográfica (2014-11)
      UJI SmartVenue es una aplicación móvil que se benef icia de los servicios de la implantación de una IDE (Infraestructura de Datos E spaciales) sectorial basada en la plataforma ArcGIS y los aplica a la ge stión ...

    • openAccess   UJIIndoorLoc-Mag: A New Database for Magnetic Field-Based Localization Problems 

      Torres-Sospedra, Joaquín; Rambla Risueño, David; Montoliu Colás, Raul; Belmonte-Fernández, Óscar; Huerta, Joaquin IEEE (2015)
      Indoor localization is a key topic for mobile computing. However, it is still very difficult for the mobile sensing community to compare state-of-art Indoor Positioning Systems due to the scarcity of publicly available ...

    • openAccess   Ultrashort pulse fiber delivery with optimized dispersion control by reflection grisms at 800 nm 

      Kalashyan, Meri; Lefort, Claire; Martínez-León, Lluís; Mansuryan, Tigran; Mouradian, Levon; Louradour, Frederic Optical Society of America (2012)
      We experimentally demonstrate a compact and efficient arrangement for fiber delivery of sub-30 fs energetic light pulses at 800 nm. Pulses coming from a broadband Ti:Sapphire oscillator are negatively pre-chirped by a ...

    • openAccess   Ultrathin Acoustic Parity-Time Symmetric Metasurface Cloak 

      Li, Hao-xiang; Rosendo López, María; Zhu, Yi-fan; Fan, Xu-dong; Torrent, Daniel; Liang, Bin; Cheng, Jian-chun; Christensen, Johan American Association for the Advancement of Science (2019)
      Invisibility or unhearability cloaks have beenmade possible by using metamaterials enabling light or sound to flow around obstacle without the trace of reflections or shadows. Metamaterials are known for being flexible ...

    • closedAccess   Uncertainty quantification for random parabolic equations with nonhomogeneous boundary conditions on a bounded domain via the approximation of the probability density function 

      Calatayud, Julia; Cortés, Juan Carlos; Jornet, Marc John Wiley & Sons, Ltd. (2018-11-14)
      This paper deals with the randomized heat equation defined on a general bounded interval [L1, L2] and with nonhomogeneous boundary conditions. The solution is a stochastic process that can be related, via changes of variable, ...