Now showing items 1-20 of 20

    • A comparative study of calibration methods for low-cost ozone sensors in IoT platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge; Ripoll, Anna; Viana, Mar (2019-12-01)
      Article
      Open Access
      This paper shows the result of the calibration process of an Internet of Things platform for the measurement of tropospheric ozone (O 3 ). This platform, formed by 60 nodes, deployed in Italy, Spain, and Austria, consisted ...
    • A data-driven framework for air quality sensor networks 

      Ferrer Cid, Pau; Paredes Ahumada, Juan Antonio; Allka, Xhensilda; Guerrero Zapata, Manel; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2024-01-11)
      Article
      Open Access
      In this article, we present our research vision of a framework for obtaining quality data in air quality monitoring networks using low-cost sensors (LCSs). The use of LCS networks is gaining increasing acceptance in many ...
    • A low-power IoT device for measuring water table levels and soil moisture to ease increased crop yields 

      López, Emiliano; Vionnet, Carlos; Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge; Contini, Guillermo; Prodolliet, Jorge; Maiztegui, José (2022-09-09)
      Article
      Open Access
      The simultaneous measurement of soil water content and water table levels is of great agronomic and hydrological interest. Not only does soil moisture represent the water available for plant growth but also water table ...
    • Calibration of low-cost air pollutant sensors using machine learning techniques 

      Ferrer Cid, Pau (Universitat Politècnica de Catalunya, 2019-06)
      Master thesis
      Open Access
      Nowadays concern about air pollution has risen due to the effects of the climate change.The application of machine learning methods for the calibration of low-cost sensors is studied. The short-term, long-term, sensor ...
    • Comparativa de métodos de localización con Smartphones 

      Ferrer Cid, Pau (Universitat Politècnica de Catalunya, 2017-06)
      Bachelor thesis
      Open Access
      Desde la aparición del iPhone en enero del 2007 y de los teléfonos Android en octubre del 2008, el uso de teléfonos inteligentes (smartphones) ha crecido de manera sostenida, de modo que ya forman parte de nuestro día a ...
    • Data reconstruction applications for IoT air pollution sensor networks using graph signal processing 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Elsevier, 2022-09)
      Article
      Open Access
      The analysis of sensor networks for air pollution monitoring is challenging. Recent studies have demonstrated the ability to reconstruct the network measurements with graphs derived from the acquired data, thus describing ...
    • Distributed multi-scale calibration of low-cost ozone sensors in wireless sensor networks 

      Barceló Ordinas, José María; Ferrer Cid, Pau; García Vidal, Jorge; Ripoll, Anna; Viana, Mar (Multidisciplinary Digital Publishing Institute (MDPI), 2019-05-31)
      Article
      Open Access
      New advances in sensor technologies and communications in wireless sensor networks have favored the introduction of low-cost sensors for monitoring air quality applications. In this article, we present the results of the ...
    • Graph learning techniques using structured data for IoT air pollution monitoring platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2021-09-01)
      Article
      Open Access
      Existing air pollution monitoring networks use reference stations as the main nodes. The addition of low-cost sensors calibrated in-situ with machine learning techniques allows the creation of heterogeneous air pollution ...
    • Graph signal reconstruction techniques for IoT air pollution monitoring platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2022-12-15)
      Article
      Open Access
      Air pollution monitoring platforms play a very important role in preventing and mitigating the effects of pollution. Recent advances in the field of graph signal processing have made it possible to describe and analyze air ...
    • H2020 project CAPTOR dataset: Raw data collected by low-cost MOX ozone sensors in a real air pollution monitoring network 

      Barceló Ordinas, José María; Ferrer Cid, Pau; García Vidal, Jorge; Viana Rodríguez, Mar; Ripoll, Anna (Elsevier, 2021-06)
      Article
      Open Access
      The H2020 CAPTOR project deployed three testbeds in Spain, Italy and Austria with low-cost sensors for the measurement of tropospheric ozone (O3). The aim of the H2020 CAPTOR project was to raise public awareness in a ...
    • Machine Learning (ML) module 

      Barceló Ordinas, José María; García Vidal, Jorge; Ferrer Cid, Pau (Universitat Politècnica de Catalunya, 2023-06-27)
      Lecture notes
      Open Access
    • Multisensor data fusion calibration in IoT air pollution platforms 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge; Ripoll, Anna; Viana, Mar (2020-04-01)
      Article
      Open Access
      This article investigates the calibration of low-cost sensors for air pollution. The sensors were deployed on three Internet of Things (IoT) platforms in Spain, Austria, and Italy during the summers of 2017, 2018, and 2019. ...
    • On the data quality improvement of air pollution monitoring low-cost sensor networks using data-driven techniques 

      Ferrer Cid, Pau (Universitat Politècnica de Catalunya, 2023-05-08)
      Doctoral thesis
      Open Access
      (English) Nowadays, authorities monitor the concentrations of regulated air pollutants in order to assist in decision-making processes, e.g., for the implementation of traffic restrictions, and mitigate the effects of air ...
    • Raw data collected from NO2, O3 and NO air pollution electrochemical low-cost sensors 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Elsevier, 2022-12)
      Article
      Open Access
      Recently, the monitoring of air pollution by means of lowcost sensors has become a growing research field due to the study of techniques based on machine learning to improve the sensors’ data quality. For this purpose, ...
    • Review of linear algebra and applications to data science 

      Barceló Ordinas, José María; García Vidal, Jorge; Ferrer Cid, Pau (Universitat Politècnica de Catalunya, 2023-07-17)
      Lecture notes
      Open Access
    • Review of probability theory 

      Barceló Ordinas, José María; García Vidal, Jorge; Ferrer Cid, Pau (Universitat Politècnica de Catalunya, 2023-07-17)
      Lecture notes
      Open Access
    • Robust proxy sensor model for estimating black carbon concentrations using low-cost sensors 

      Paredes Ahumada, Juan Antonio; Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge; Reche Andúgar, Cristina; Viana Rodríguez, Mar (Association for Computing Machinery (ACM), 2023)
      Conference lecture
      Open Access
      Air quality monitoring sensor networks focusing on air pollution measure pollutants that are regulated by the authorities, such as CO, NO2, NO, SO2, O3, and particulate matter (PM10, PM2.5). However, there are other ...
    • Sampling trade-offs in duty-cycled systems for air quality low-cost sensors 

      Ferrer Cid, Pau; García Calvete, Julio; Main Nadal, Aina; Ye, Zhe; Barceló Ordinas, José María; García Vidal, Jorge (Multidisciplinary Digital Publishing Institute (MDPI), 2022-05-23)
      Article
      Open Access
      The use of low-cost sensors in conjunction with high-precision instrumentation for air pollution monitoring has shown promising results in recent years. One of the main challenges for these sensors has been the quality of ...
    • Temporal pattern-based denoising and calibration for low-cost sensors in IoT monitoring platforms 

      Allka, Xhensilda; Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2023-01-25)
      Article
      Open Access
      The introduction of low-cost sensors (LCSs) in air quality Internet of Things (IoT) monitoring platforms presents the challenge of improving the quality of the data that these sensors provide. In this article, we propose ...
    • Volterra graph-based outlier detection for air pollution sensor networks 

      Ferrer Cid, Pau; Barceló Ordinas, José María; García Vidal, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2022-07)
      Article
      Open Access
      Today's air pollution sensor networks pose new challenges given their heterogeneity of low-cost sensors and high-cost instrumentation. Recently, with the advent of graph signal processing, sensor network measurements have ...