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    Good Practice Guide for calibrating a hydrophone "in situ" with a non-omnidirectional source at 10 kHz (26-34)  Open access

     Garcia Benadí, Albert; Cadena Muñoz, Javier; Del Rio Fernandez, Joaquin; Roset Juan, Francesc Xavier; Manuel Lazaro, Antonio
    ACTA IMEKO
    Vol. 4, num. 1, p. 26-34
    Date of publication: 2015-02-13
    Journal article

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    The aim of this paper is to provide the basis for the calibration of a hydrophone "in situ" with a non-omnidirectional source at 10 kHz, thus assigning a value of uncertainty, which may be high, but according to requirements, may be sufficient

  • Validation of a Orcaflex OBSEA's platform model  Open access

     Massana Hugas, Immaculada; Del Rio Fernandez, Joaquin; Prat Farran, Joana d'Arc
    Instrumentation viewpoint (electrònic)
    num. 17, p. 49-50
    Date of publication: 2014-12-22
    Journal article

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  • Acoustic modem for underwater sensor networks  Open access

     Sarria Gandul, David; Pallares Valls, Oriol; Del Rio Fernandez, Joaquin
    Instrumentation viewpoint (electrònic)
    num. 17, p. 29-30
    Date of publication: 2014-12-15
    Journal article

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    This work presents the development of an acoustic modem for Underwater Sensor Networks. Since all commercial acoustic modems are designed for long range communication, it is necessary to develop a system capable to fulfill the necessities of a low cost, and small range underwater sensor network. This design moves towards an analogous functionality to terrestrial small sensor networks, which are easy to deploy, and allows scientists to investigate our oceans.

  • Circadian rhythms in temperate fishes at the OBSEA cabled observatory  Open access

     Aguzzi, Jacopo; Sbragaglia, Valerio; Santamaria Motis, Guillem; Del Rio Fernandez, Joaquin; Sardà Amills, Francesc; Nogueras Cervera, Marc; Manuel Lazaro, Antonio
    Instrumentation viewpoint (electrònic)
    num. 17, p. 51-54
    Date of publication: 2014-12-15
    Journal article

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    We used for the first time a coastal cabled observatory (OBSEA) to video-monitor activity rhythms of different fish species within an artificial reef area at a high frequency. 30 min daily count patterns were continuously measured during one month and compared with the corresponding solar irradiance. A significant day-night patterning was observed in the majority of recognized taxa by periodogram analysis. 3 types of rhythms were identified in waveform plotting.

  • Design and characterization of an oscillating energy harvester with planked piezoelectric for observatory OBSEA  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Carbonell Ventura, Montserrat; Bernet Piquet, Ferran; Miquel Masalles, Jaume
    Instrumentation viewpoint (electrònic)
    num. 17, p. 14-15
    Date of publication: 2014-12-15
    Journal article

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    For the expansion of the OBSEA underwater cable observatory, which is run by the UPC and is located at 4 km away from the coast of Vilanova i la Geltru, new underwater wireless sensors are envisioned. Therefore, a solution is required to generate power to wireless sensors using only sea. In this project we will solve this problem using a prototype based on a Bristol cylinder which can generate electrical voltage using vibration piezoelectric. These vibrations are generated by plectrums impacts which create continuous free vibration in piezoelectric after impacting them. The results give us an acceptable power and it describes a plectrum distribution based on frequency and amplitude of usually OBSEA sea wave behavior.

  • Energía nuclear de fusión y el proyecto INTELLECT: una introducción  Open access

     Moreno Lupiañez, Manuel; Del Rio Fernandez, Joaquin; Prat Tasias, Jordi; Sitjar Cañellas, Rafael; Carreras Pons, Normandino
    Instrumentation viewpoint (electrònic)
    num. 17, p. 36-41
    Date of publication: 2014-12-15
    Journal article

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    An introduction to the nuclear fusion is presented. Some relevant aspects of the physics of thermonuclear plasmas and the technology related to the fusion reactors are summarized. The article tries to be a first contact with the fusion energy. SARTI has started to work at this field after the participation in the national research coordinated project INTELLECT (2013-2015). The generic aims of the project and the tasks assigned to our group are also presented.

  • Sistema de test de motores electrónicos doga para ensayos en cabinas húmedas y cámara climática  Open access

     Del Rio Fernandez, Joaquin; Sarria Gandul, David; Pallares Valls, Oriol; Rull, Alberto
    Instrumentation viewpoint (electrònic)
    num. 17, p. 12
    Date of publication: 2014-12-15
    Journal article

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    La automatización de ensayos de motores electrónicos que incluyen bus de comunicación LIN comporta el desarrollo de un sistema hardware y software que permita la definición del ensayo, las variables del motor a registrar y las posibles alarmas que puedan sucederse durante el ensayo. El grupo SARTI de la UPC y técnicos de DOGA han diseñado y puesto en marcha un banco de test flexible para diferentes modelos de motor. La aplicación software ha sido desarrollada mediante el uso del lenguaje de programación gráfica LabVIEW. La comunicación con el motor electrónico se ha resuelto mediante tarjetas de comunicación NI-LIN. La adquisición de datos analógicos como el consumo del motor, su posición, o la temperatura se ha resuelto mediante el uso de una tarjeta de adquisición de datos USB multifunción y sistemas CompactDAQ.

  • Validation of a Orcaflex OBSEA's platform model  Open access

     Massana Hugas, Immaculada; Del Rio Fernandez, Joaquin; Prat Farran, Joana d'Arc
    Instrumentation viewpoint (electrònic)
    num. 17, p. 49-50
    Date of publication: 2014-12-15
    Journal article

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    Offshore platforms or surface turbines at sea are exposed constantly to the dynamic behavior of the waves, current and wind; it is important to have knowledge about the dynamic response of such structures to wind and waves. We conducted numerical simulations with the help of OrcaFlex software using a small, existing platform with a buoy spar-type, OBSEA, located 4 kilometers offshore Vilanova i la Geltrú coast in a fishing protected area of the Catalan coast of Spain. OBSEA collects data in real time like current profile, waves and wind among other data. This work validates the results of OrcaFlex model via GPS data and give insight to relevant results of the orbit of buoy simulations.

  • Calorimetrically-calibration means automated video-imaging protocol for the day-night fish couting at the OBSEA cabled observatory  Open access

     Del Rio Fernandez, Joaquin; Aguzzi, Jacopo; Costa, Corrado; Menesatti, Paolo; Sbragaglia, Valerio; Nogueras Cervera, Marc; Sardà Amills, Francesc; Manuel Lazaro, Antonio
    Instrumentation viewpoint (electrònic)
    num. 17, p. 55-57
    Date of publication: 2014-12-15
    Journal article

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    We describe a new automated video-imaging protocol for the 24-h continuous counting of fishes in calorimetrically calibrated timelapse photographic outputs, taken by a shallow water (20 m depth) cabled video-platform, the OBSEA. The spectral reflectance value for each patch was measured between and then converted in standard RGB, used as a reference for all following calibrations. All the images were acquired within a standardized Region Of Interest, represented by a 2 x 2 m methacrylate panel, using the recently implemented “3D Thin-Plate Spline” warping approach. That operation was repeated on a subset of images, 500 images as a training set, manually selected since acquired under optimum visibility conditions. All images plus those for the training set were ordered together through Principal Component Analysis allowing the selection of 614 images out of 90% as a total corresponding to 18 days (at 30 min frequency). The Roberts operator was used to highlights regions of high spatial colour gradient corresponding to fishes’ bodies. Time series in manual and visual counts were compared together for efficiency evaluation.

  • Real-time electrochemical corrosion measurements: potentiostat design  Open access

     Masmitja Rusiñol, Ivan; Del Rio Fernandez, Joaquin; Damborenea González, Juan José; Conde, A.
    Instrumentation viewpoint (electrònic)
    num. 17, p. 13
    Date of publication: 2014-12-15
    Journal article

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    Corrosion due to seawater studies are urgently required for a safe technology development. Some studies demonstrated that the corrosion rates for most alloys could be four times less than surface corrosion rates. A device for continuous electrochemical measuring of corrosion in real time and underwater is shown in this paper. Therefore, this equipment allows improving the knowledge about long-term materials behavior in this aggressive environment for the scientific community. Also, it has been designed to allow the connection to underwater observatories such as OBSEA.

  • Sistema de adquisición de datos inteligente para un reactor de fusión  Open access

     Sánchez Florido, Alberto; Del Rio Fernandez, Joaquin; Artero Delgado, Carola; Moreno Lupiañez, Manuel
    Instrumentation viewpoint (electrònic)
    num. 17, p. 42-43
    Date of publication: 2014-12-15
    Journal article

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    A system has been implemented for remote and intelligent gain control with an offset or voltage level added to the amplifiers, to exploit the full dynamic range of a data acquisition system (DAQ). The system collects information about the radiation from a nuclear fusion reactor installed at CIEMAT (Madrid). The hardware and software has been developed to replace the current acquisition system, which enhance its functionality.

  • OBSEA citizen science en área de ciencia de la obra social "la Caixa"  Open access

     Bghiel, Ikram; Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; López, Elena
    Instrumentation viewpoint (electrònic)
    num. 17, p. 21
    Date of publication: 2014-12-15
    Journal article

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    In this paper, the Citizen Science experience, at Science Area of the Obra Social “la Caixa” in Barcelona, with the OBSEA costal-cabled video-observatory, deployed in western Mediterranean [1] is presented. A local biodiversity survey is being conducted by citizens as generic nonexperienced users helping to identify and classify fishes appearing within time-lapse images. For this it was implemented a protocol for the web-based species identification which is presented in this paper.

  • Next generation of web enabled ocean sensor systems  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; O'Reilly, Thomas C.; Delory, Eric; Pearlman, Jay S; Waldmann, Christoph; Jirka, Simon
    Instrumentation viewpoint (electrònic)
    num. 17, p. 16-18
    Date of publication: 2014-12-15
    Journal article

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    The complexity of installations in the oceans to carry out observations on specific processes and for detecting long-term trends have grown significantly in the past years. This applies also to the type and number of sensors that are in use in observing systems. In these days, sensors shall be compatible to different platforms that are in use like floats, gliders or moorings, and accordingly also different data acquisition systems. Facilitating the integration process in existing or newly established observing systems comes with a real benefit for the operators and is important for the broader application of different sensors. Therefore, the situation at this point in time is characterized by the fact that parallel approaches have been developed (IEEE 1451, the OGC set of standards, etc.) that are ready to be evaluated but still lacking the support by the community. The objective of the European FP7 project NeXOS (Next generation Low-Cost Multifunctional Web Enabled Ocean Sensor Systems Empowering Marine, Maritime and Fisheries Management) is to develop several sensor systems for specific technologies and monitoring strategies such as: ocean passive acoustics, ocean optics, and EAF monitoring (Ecosystem Approach to Fisheries), that will provide an integrated, technologically coherent system for multi-scale, multi-parameter monitoring of the oceans. For all these sensors system, NeXOS will develop the Smart Electronic Interface for Sensors and Instruments (SEISI) which is a set of standards and functionalities to enable Web-based sharing, discovery, exchange and processing of sensor observations, and operation of sensor systems. The architecture will satisfy international standards, defined by ISO, OGC, and the INSPIRE directive, to enable integration of marine sensors with existing observing systems. The SEISI will provide a multifunctional interface for many types of current sensors and instruments as well as the new multiparameter sensor systems, and a standard interface for existing observing systems platforms such as: cabled observatories, buoys, gliders or Ferryboxes on ship or vessel of opportunity. To achieve the compatibility with all these platforms, the sensor systems developed in NeXOS based on SEISI will be designed to accomplish two main requirements of these platforms regarding the communication bandwidth and the power consumption.

  • Sistema de medida de intensidad lumínica para columna de agua basada en plataforma Arduino  Open access

     Jiménez Ortiz, Francisco José; Nogueras Cervera, Marc; Artero Delgado, Carola; Del Rio Fernandez, Joaquin
    Instrumentation viewpoint (electrònic)
    num. 17, p. 44-48
    Date of publication: 2014-12-15
    Journal article

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    En el siguiente artículo se mostrará el sistema de medida de intensidad lumínica basado en plataforma Arduino diseñado para el observatorio submarino OBSEA. El sistema estará formado por 20 nodos sensores que permitirán captar la intensidad lumínica y la temperatura bajo el mar a cada metro de profundidad, hasta los 20 metros. Una plataforma Arduino gestionará los 20 nodos sensores, permitiendo solicitar datos a los nodos, y enviar/recibir paquetes de datos a través de un módem 3G situado en la superficie de la boya. Mediante un instrumento virtual diseñado con LabVIEW se podrán visualizar los datos de los nodos sensores, enviar solicitudes de datos individuales para cada nodo y realizar tests de vida de los nodos para comprobar su correcto funcionamiento. La comunicación entre el sistema de nodos situados en la boya del OBSEA y el instrumento virtual se realizará mediante el protocolo TCP/IP.

  • Wireless-based ocean-bottom seismographic observation system  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    Instrumentation viewpoint (electrònic)
    num. 17, p. 24-25
    Date of publication: 2014-12-15
    Journal article

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    Recent seismic activity, possible induced, in the Gulf of Valencia or the intense underwater seismic activity associated with the eruption of El Hierro (2011-2012) shows the importance of controlling the seismicity located in the sea that is not covered by the terrestrial monitoring networks. To overcome this problem, this work propose the development of a “Wireless-based” Ocean-bottom Seismographic Observation System which will integrate different measurement and data communication technologies in a new design with a buoy on surface and a seafloor seismometer. The integration of real time data generated by marine seismometers will be possible thanks to the development of wireless communication systems, the increasing potential for miniaturization of sensors, storage devices and data processing, which have opened the door to a new generation of distributed intelligent sensor networks that are connected by communication networks.

  • Metrology for essential climate variables (ENV58 MeteoMet2)

     Del Rio Fernandez, Joaquin
    Competitive project

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  • A Sensor web architecture for sharing oceanographic sensor data

     Jirka, Simon; Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Delory, Eric
    IEEE Sensor Systems for a Changing Ocean
    p. 1-4
    DOI: 10.1109/SSCO.2014.7000365
    Presentation's date: 2014-11-13
    Presentation of work at congresses

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    This paper introduces the Sensor Web architecture of the NeXOS project as example how interoperable standards help, to facilitate the creation of an infrastructure for sharing oceanographic observation data and the integration of sensor data into applications. Important technological foundations of the NeXOS Sensor Web architecture are the concepts of spatial data infrastructures and the Sensor Web Enablement framework of the Open Geospatial Consortium. As a result an architecture concept has been developed, which is introduced in this paper.

  • Smart electronic interface for web enabled ocean sensor systems

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Jirka, Simon; Delory, Eric; Pearlman, Jay S
    IEEE Sensor Systems for a Changing Ocean
    DOI: 10.1109/SSCO.2014.7000375
    Presentation's date: 2014-10-13
    Presentation of work at congresses

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    The objective of the European FP7 project NeXOS (Next generation Low-Cost Multifunctional Web Enabled Ocean Sensor Systems Empowering Marine, Maritime and Fisheries Management) is to develop cost-efficient innovative and interoperable in-situ sensors deployable from multiple platforms to support the development of a truly integrated Ocean Observing System. Therefore, several sensor systems will be developed in NeXOS project for specific technologies and monitoring strategies such as: ocean passive acoustics, ocean optics, and EAF monitoring (Ecosystem Approach to Fisheries), that will provide an integrated, technologically coherent system for multi-scale, multi-parameter monitoring of the oceans. For all these sensors system, NeXOS will develop the Smart Electronic Interface for Sensors and Instruments (SEISI) which is a set of standards and functionalities to enable Web-based sharing, discovery, exchange and processing of sensor observations, and operation of sensor systems. The architecture will satisfy international standards, defined by ISO, OGC, and the INSPIRE directive, to enable integration of marine sensors with existing observing systems. The SEISI will provide a multifunctional interface for many types of current sensors and instruments as well as the new multi-parameter sensor systems, and a standard interface for existing observing systems platforms such as: cabled observatories, buoys, gliders or Ferryboxes on ship or vessel of opportunity. To achieve the compatibility with all these platforms, the sensor systems developed in NeXOS based on SEISI will be designed to accomplish two main requirements of these platforms regarding the communication bandwidth and the power consumption.

  • Underwater potentiostat for real-time electrochemical corrosion measurements

     Masmitja Rusiñol, Ivan; Del Rio Fernandez, Joaquin; Damborenea González, Juan José; Conde, A.
    IEEE Sensor Systems for a Changing Ocean
    p. 1-4
    DOI: 10.1109/SSCO.2014.7000386
    Presentation's date: 2014-10-13
    Presentation of work at congresses

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    Corrosion due to seawater studies are urgently required for a safe technology development. Some studies demonstrated that the corrosion rates for most alloys could be four times less than surface corrosion rates. A device for continuous electrochemical measuring of corrosion in real time and underwater is shown in this paper. Therefore, this equipment allows improving the knowledge about long-term materials behavior in this aggressive environment for the scientific community. Also, it has been designed to allow the connection to underwater observatories such as OBSEA.

  • Underwater acoustic communication messaging time stamp applied to global time synchronization

     Pallares Valls, Oriol; Del Rio Fernandez, Joaquin; Bouvet, Pierre-Jean
    IEEE Sensor Systems for a Changing Ocean
    p. 1-5
    DOI: 10.1109/SSCO.2014.7000380
    Presentation's date: 2014-10-13
    Presentation of work at congresses

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    This paper presents a new approach to time stamp messages in underwater acoustic communication. Message time stamping is a widely used method for synchronizing two clocks over a cabled or wireless communication, by exchanging time information in pilot messages. In this work we use a National Instruments Field-Programmable Gate Array (FPGA) for performing deterministic hardware time stamp of windowed acquired data, and then we apply a software detection of frame information inside this acquisition window. Frame time stamp in conjunction with global time reference enclosed in the message, provide enough information for achieving synchronization accuracy between two clocks below few microseconds.

  • NeXOS development plans in ocean optics, acoustics and observing systems interoperability

     Delory, Eric; Castro, Ayoze; Waldmann, Christoph; Rolin, Jean-François; Woerther, Patrice; Gille, J.; Del Rio Fernandez, Joaquin; Zielinski, O.; Golmen, L.; Hareide, N. R.; Pearlman, Jay S
    IEEE Sensor Systems for a Changing Ocean
    DOI: 10.1109/SSCO.2014.7000382
    Presentation's date: 2014-10-13
    Presentation of work at congresses

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    A growing concern about the health of the world oceans resulting from multiple stressors as for instance effects of climate change and increasing offshore activities leads to the need of better observational tools and strategies. The objective of the NeXOS project is to serve those needs by developing new costeffective, innovative and compact integrated multifunctional sensor systems for ocean optics, ocean passive acoustics, and an Ecosystem Approach to Fisheries (EAF), which can be deployed from mobile and fixed ocean observing platforms, as well as to develop downstream services for the Global Ocean Observing System, Good Environmental Status of European marine waters and the Common Fisheries Policy.

  • Intelligent sensors : Why they are so important for future ocean observing systems

     Waldmann, Christoph; Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; O'Reilly, Thomas C.; Pearlman, Jay S
    IEEE Sensor Systems for a Changing Ocean
    DOI: 10.1109/SSCO.2014.7000378
    Presentation's date: 2014-10-13
    Presentation of work at congresses

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    The complexity of installations in the oceans to carry out observations on specific processes and for detecting long-term trends have grown significantly in the past years. This applies also to the type and number of sensors that are in use in observing systems. In these days, sensors shall be compatible to different platforms that are in use like floats, gliders or moorings, and accordingly also different data acquisition systems. Facilitating the integration process in existing or newly established observing systems comes with a real benefit for the operators and is important for the broader application of different sensors. However, how to achieve the goals is under debate. The most serious obstacle for all initiatives is the willingness of stakeholders to adopt a strategy and, even more so, to adopt a specific architecture to enable interoperability across platforms and observing systems. Therefore, the situation at this point in time is characterized by the fact that parallel approaches have been developed (IEEE 1451, the OGC set of standards, etc.) that are ready to be evaluated but still lacking the support by the community. Therefore it seems to be a good time to consider and to agree on the implementation of interoperability arrangements.

  • Systematic quality control for long term ocean observations and applications

     Toma, Daniel Mihai; Garcia Benadí, Albert; Mànuel González, Bernat-Joan; Del Rio Fernandez, Joaquin
    International workshop on Metrology for Meteorology and Climate
    p. 74
    Presentation's date: 2014-09-16
    Presentation of work at congresses

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    The growing needs for real-time processing of data and the sheer quantity of data produced by these observatories means that automated Quality Assurance/Quality Control (QA/QC) is necessary to ensure that the collected data has the quality required for its purpose. This paper demonstrates the use of a well-defined community adopted QA/QC tests and automated data quality assessments to provide a continuous scale of data quality, the capture of information about the system provenance, sensor and data processing history.

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    Experimental validation and modeling of plucked piezoelectric for underwater energy harvesting system  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Carbonell Ventura, Montserrat; Bernet Piquet, Ferran; Miquel Masalles, Jaume
    Symposium on Measurements of Electrical Quantities
    p. 45-49
    Presentation's date: 2014-09-16
    Presentation of work at congresses

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    Underwater wireless sensing systems are envisioned for stand-alone applications and as an addition to cabled observatory systems such as the OBSEA marine observatory. Therefore, this work presents a solution on how to generate power for marine wireless sensors using underwater motion energy. In this pare it is described a prototype based on a Bristol cylinder which can generate electrical voltage using piezoelectric bimorphs. Collecting water motion energy using piezoelectric energy harvesting is particularly difficult due to the mismatch between the low frequency of water kinetics and the high-frequency requirements of piezoelectric transducers. Therefore, to achieve frequency up-conversion we propose the use of the plucking technique applied to propose the use of the plucking technique applied to piezoelectric energy harvester. Experimental results show that the proposed energy harvester achieves a maximum power density of 350µW/cm3.

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    Hybrid time synchronization for Underwater Sensor Networks  Open access

     Pallares Valls, Oriol; Bouvet, Pierre-Jean; Del Rio Fernandez, Joaquin
    Symposium on Measurements of Electrical Quantities
    p. 166-170
    Presentation's date: 2014-09-15
    Presentation of work at congresses

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    Time synchronization is an important part of distributed applications over a sensor network. In this work we investigate time synchronization problems over a shallow UWSN, taking into account all main communication challenges of the water channel and observing its behavior in simulation and real tests. It is proposed an hybrid frame based time sinchronization using both, LFM and OFDM communication with channel impulse response equalization. Simulation results show how Hybrid synchronization outperforms existing synchronization protocols and how these results sults are affected in real water tests.

  • Pilot acoustic tracking study on adult spiny lobsters (Palinurus mauritanicus) and spider crabs (Maja squinado) within an artificial reef

     Rotllant Estelrich, Guiomar; Aguzzi, Jacopo; Sarria Gandul, David; Gisbert Casas, Enric; Sbragaglia, Valerio; Del Rio Fernandez, Joaquin; Simeó, Carles G.; Manuel Lazaro, Antonio; Molino, Erik; Costa, Corrado; Sardà Amills, Francesc
    Hydrobiología
    Vol. 737, num. 1, p. 27-38
    DOI: 10.1007/s10750-014-1959-5
    Date of publication: 2014-07-17
    Journal article

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    Artificial reef areas can be used for management and conservation of commercially exploited crustacean decapods but their behaviour in these environments is poorly characterised. Acoustic tags were used to study the behaviour of 3 adult spiny lobsters (Palinurus mauritanicus) and 3 adult spider crabs (Maja squinado) over a period of 64 days in summer, evaluating the use of artificial reef areas as suitable sites for re-stocking of overfished decapods. For this purpose, animals were released in a western Mediterranean artificial reef located at 20 m depth, close to a cabled seafloor observatory, which simultaneously recorded temperature, salinity, current direction, current speed and light intensity over the study period. Spiny lobsters lingered in the reef area, whereas the spider crabs left the area 21–45 h after release. These behavioural differences suggested that artificial reefs might be a good area to deploy adult lobsters for re-stocking purposes. The movements displayed by the lobsters during this experiment were not influenced by any of the measured environmental factors, whereas spider crab movements occurred against major current direction, when current speed was intense.

    Postprint (author’s final draft)

  • Standards-based plug & work for instruments in ocean observing systems

     Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; O'Reilly, Thomas C.; Bröring, Arne; Dana, David R.; Bache, Félix; Headley, Kent L.; Manuel Lazaro, Antonio; Edgington, Duane R.
    IEEE journal of oceanic engineering
    Vol. 39, num. 3, p. 430-443
    DOI: 10.1109/JOE.2013.2273277
    Date of publication: 2014-07-01
    Journal article

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    Ocean observing systems may include a wide variety of sensor and instrument types, each with its own capabilities, communication protocols, and data formats. Connecting disparate devices into a network typically requires specialized software drivers that translate command and data between the protocols of the individual instruments, and that of the platform on which they are installed. In addition, such platforms typically require extensive manual configuration to match the driver software and other operational details of each network port to a specific connected instrument. In this paper, we describe an approach to “plug & work” interoperability, using standardized protocols to greatly reduce the amount of instrument-specific software and manual configuration required for connecting instruments to an observatory system. Our approach has two main components. First, we use the sensor interface descriptor (SID) model, based on the Open Geospatial Consortium's (OGC) SensorML standard, to describe each instrument's protocol and data format, and to provide a generic driver/parser. Second, a new OGC standard known as the programmable underwater connector with knowledge (PUCK) protocol enables storage and retrieval of the SID file from the instrument itself. We demonstrate and evaluate our approach by applying it to three commonly used marine instruments in the OBSEA (Barcelona, Spain) observatory test bed.

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    Simulation of cable dynamics for moored ocean platforms: modeling aids design of large, underwater power cable  Open access

     Prat Farran, Joana d'Arc; Zaragoza Monroig, Maria Luisa; Del Rio Fernandez, Joaquin
    Sea technology
    Vol. 55, num. 7, p. 39-42
    Date of publication: 2014-07-01
    Journal article

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  • NeXOS objectives in multi-platform underwater passive acoustics

     Delory, Eric; Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Ruiz, Pablo; Corradino, Luigi; Brault, Patrice; Fiquet, Frédéric
    International Conference and Exhibition on Underwater Acoustics
    p. 208
    Presentation's date: 2014-06-24
    Presentation of work at congresses

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    The objective of the NeXOS project is to develop cost-effective, innovative and compact integrated multifunctional sensor systems in ocean optics, ocean passive acoustics and for an Ecosystem Approach to Fisheries (EAF), which can be deployed from mobile and fixed ocean observing platforms. Resulting downstream services will contribute to the GEOSS, the Marine Strategy Framework Directive (MSFD) and the Common Fisheries Policy of the European Union. The development of innovative hydrophones will focus on the pre and post-processing of acoustic information and improved transducer integration, reducing size and overall procurement and operations cost while increasing functionality. An important part of the effort will focus on the need for greater dynamic range and the integration on autonomous platforms, such as gliders and profilers. Embedded processing will be reconfigurable, allowing the monitoring of MSFD Good Environmental Status descriptors 1 (Biodiversity) and 11 (Underwater Noise) as minimal requirements. The first phase of the project consists in interacting with scientific communities and the industry in order to narrow down initial requirements and possibly extend the planned functionalities to new applications. The presentation will provide an overview of the project and an update on current progress, with a focus on unmanned vehicles and mobile platforms more generally. NeXOS is co-funded by the European Commission 7th Framework Programme, the Ocean of Tomorrow 2013.

  • The OBSEA Citizen Science Project

     Aguzzi, Jacopo; Del Rio Fernandez, Joaquin
    Barcelona Citizen Science Day
    Presentation's date: 2014-06-11
    Presentation of work at congresses

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    Multiparametric seafloor observatories connected to shore for real-time data transmission represent a frontier in marine technology with important societal implications for environmental monitoring and conservation. Here, we present a Citizen Science project with the OBSEA video-observatory of Vilanova i la Gertrú at 20 m depth. A biodiversity survey is going to be conducted by citizens (students and divers), helping to classify and count fishes within different digital products (time-lapse images and footages). The objective is to track fish assemblage changes in relation to meteorology and species intrinsic day-night and seasonal behaviors. Accordingly, we implemented a protocol for the web-based species identification supervised by scientists, in order to evaluate the different performances for each group. Outputs are being presented at the CosmoCaixa Exposition “Mediterraneo” (https://www.educaixa.com/microsites/Mediterrani/laboratorio_submarino/)

  • Development of a wireless seismic array for volcano monitoring

     Moure, David; Toma, Daniel Mihai; Manuel Lazaro, Antonio; Del Rio Fernandez, Joaquin; Carreras Pons, Normandino; Blanco, María José
    European Geosciences Union General Assembly
    Presentation's date: 2014-05-02
    Presentation of work at congresses

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    Volcano monitoring is mainly based on three sciences: seismology, geodesy and geochemistry. Seismic arrays are used to locate the seismic source, based on analysis of signals recorded by each seismometer. The most important advantages of arrays over classical seismic networks are: painless deployment, no major infrastructures needed, able to provide an approximate location of a signal that is not feasible by a seismic network. In this paper the design of a low-power wireless array is presented. All sensors transmit acquired data to a central node which is capable to calculate the possible location of the seismic source in real-time. The reliability of those locations depends, among other parameters (number of sensors and geometrical distribution), on precision of time synchronization between the nodes. To achieve the necessary precision, the wireless seismic array implements a time synchronization protocol based on the IEEE1588 protocol, which ensures clock synchronization between nodes better than a microsecond, therefore, signal correlation between sensors is achieved correlating the signals from all the sensors. The ultimate challenge would be that the central node receives data from all the seismometers locating the seismic source, only transmitting the result, which dramatically reduces data traffic. Often, active volcano areas are located far from inhabited areas and data transmission options are limited. In situ calculation is crucial in order to reduce data volume transmission generated by the seismic array.

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    Automated data quality assurance using OGC sensor web enablement frameworks for marine observatories  Open access

     Manuel Lazaro, Antonio; Carreras Pons, Normandino; Bghiel, Ikram; Hidalgo Castro, Alberto; Del Rio Fernandez, Joaquin; Toma, Daniel Mihai
    European Geosciences Union General Assembly
    Presentation's date: 2014-05-02
    Presentation of work at congresses

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    Wireless HDLC protocol for energy-efficient large-scale linear wireless sensor networks  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    International journal of distributed sensor networks
    Vol. 2014, p. 1-14
    DOI: 10.1155/2014/916073
    Date of publication: 2014-04-17
    Journal article

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    Wireless sensor networks (WSNs) have been widely recognized as a promising technology that can enhance various aspects of infrastructure monitoring. Typical applications, such as sensors embedded in the outer surface of a pipeline or mounted along the supporting structure of a bridge, feature a large-scale linear sensor arrangement. In this paper, we propose a new bidirectional wireless communication scheme, based on the high-level data link control (HDLC) standard, for devices with short-range transmission capabilities for linear sensor topology. By applying for the first time a standard data layer along with a time division multiple access (TDMA)-based medium access control (MAC) and time synchronization technique specifically designed for the linear topology, we address the interoperability problem with guaranteed energy efficiency and data link performance in linear sensor topology. The proposed Wireless HDLC supports half-duplex communication, point to point (peer to peer), and multipoint networking.

  • Sistemas inalámbricos para la monitorización continua del comportamiento de especies marinas

     Sarria Gandul, David
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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    En este trabajo de Tesis se proponen y evalúan nuevos métodos para la monitorización de especies marinas, empleando tecnologías ópticas, por radiofrecuencia y acústicas para estudios biológicos en laboratorio (acuarios de experimentación) y en espacios abiertos.Se ha realizado un estudio de las tecnologías empleadas para la monitorización de especies, presentado y analizado las ventajas e inconvenientes de cada una de ellas. Aunque la tecnología óptica permite el estudio de especies sin contacto (no invasiva), requiere un correcto posicionamiento de sus elementos y está limitada por el alcance, las condiciones cambiantes del medio y la bioincrustación. Los dispositivos de radiofrecuencia permiten el estudio de especies que emergen a la superficie, o las que habitan en entornos de agua dulce; en el entorno marino esta tecnología se encuentra restringida debido a la gran absorción que sufren las señales electromagnéticas en ese medio. Los dispositivos acústicos facilitan la monitorización de especies en espacios abiertos de gran extensión, permitiendo su localización y seguimiento; sin embargo, esta tecnología presenta una gran sensibilidad a diferentes factores que impone el medio marino como el multicamino, la variación temporal y espacial del canal o el efecto Doppler, entre otros.La investigación se ha estructurado en tres partes donde, utilizando las tecnologías citadas, se han propuesto, diseñado y validado con éxito diferentes sistemas de medida. En primer lugar, se han evaluado los detectores de infrarrojos y las cámaras de bajo coste para la monitorización de especies en laboratorio. La propuesta contempla diferentes soluciones que independizan el sistema de las dimensiones del acuario, permitiendo su ampliación y configuración automática. Así mismo, mediante los algoritmos de procesado programados se han reducido las detecciones erróneas causadas por alteraciones de la calidad del agua (turbiedad), la presencia de partículas que obstruyen la línea de vista entre el par emisor-receptor y el deterioro de los transductores. En la segunda parte del trabajo de Tesis se han propuesto soluciones aplicando la tecnología RFID (Radio Frequency IDentification), mediante el diseño y validación experimental de un sistema de localización y seguimiento de especies en acuarios de experimentación. La propuesta realizada plantea mecanismos que independizan el sistema del tamaño del acuario, y permiten la autoconfiguración de sus componentes. Los resultados obtenidos han demostrado la validez de esta tecnología para localizar y seguir la trayectoria de especies bentónicas en espacios reducidos y con una resolución de varios centímetros.Finalmente, se ha evaluado el rendimiento de un equipo acústico comercial en mar abierto, a baja profundidad y en las proximidades de un entorno con arrecifes artificiales, donde ocurren complejas y numerosas reflexiones. Debido a la falta de estándares, la incompatibilidad entre fabricantes y con objeto de mejorar los resultados anteriores, en esta parte de la investigación se ha propuesto, construido y evaluado un prototipo de transductor acústico y una plataforma abierta de comunicaciones OFDM (Ortogonal Frequency Division Multiplexing), acercando la tendencia y los avances actuales en materia de comunicaciones acústicas a los sistemas de monitorización de especies marinas.

  • Smart IEEE-1588 GPS clock emulator for cabled ocean sensors

     Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; Shariat Panahi, Shahram; Auffret, Yves; Manuel Lazaro, Antonio
    IEEE journal of oceanic engineering
    Vol. 39, num. 2, p. 269-275
    DOI: 10.1109/JOE.2013.2265513
    Date of publication: 2014-04-02
    Journal article

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    Today, cabled seafloor observatories are installed at many sites around the globe, gathering different types of sensors in the marine environment where a Global Positioning System (GPS) signal is not accessible. Accurate time marking of ocean sensor data is highly important in many marine applications. This paper presents a smart GPS emulator based on the IEEE–1588 Precision Time Protocol (PTP). The device was designed and implemented to be able to provide accurate timing data (trigger + time code) to any ocean sensor as a broadband seismometer. In this case, accurate location and magnitude of a detected earthquake are dependent on the accuracy of the data time marks. The performance of time synchronization is tested, using a commercial broadband seismometer, and the results are presented. These tests are based on a comparison of the synchronization trigger between master and slave clocks as well as the analysis of the data acquired by the seismometer. The work presented here leads to an improved performance of the ocean-bottom seismometers as well as tsunami warning systems.

  • Objectives of the NeXOS project in developing next generation ocean sensor systems for a more cost-efficient assessment of ocean waters and ecosystems, and fisheries management

     Delory, Eric; Castro, Ayoze; Waldmann, Christoph; Rolin, Jean-François; Woerther, Patrice; Gille, J.; Del Rio Fernandez, Joaquin; Zielinski, O.; Golmen, L.; Hareide, N. R.; Pearlman, Jay S; Garello, R.
    OCEANS MTS/IEEE
    p. 6964574-1-6964574-6
    DOI: 10.1109/OCEANS-TAIPEI.2014.6964574
    Presentation's date: 2014-04
    Presentation of work at congresses

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    The NeXOS project aims to develop new multifunctional sensor systems supporting a number of scientific, technical and societal objectives, ranging from more precise monitoring and modelling of the marine environment to an improved management of fisheries. Several sensors will be developed, based on optical and passive acoustics technologies, addressing key environmental descriptors identified by the European Marine Strategy Framework Directive (MSFD) for Good Environmental Status (GES). Two of the new sensors will also contribute to the European Union Common Fisheries Policy (CFP), with a focus on variables of interest to an Ecosystem Approach to Fisheries (EAF). An objective is the improved cost-efficiency, from procurement to operations, via the implementation of several innovations, such as multiplatform integration, greater reliability through better antifouling management, greater sensor and data interoperability and the creation of market opportunities for European enterprises. Requirements will be further analysed for each new sensor system during the first phase of the project. Those will then be translated into engineering specifications, leading to the development phase. Sensors will then be tested, calibrated, integrated on several platform types, scientifically validated and demonstrated in the field. Translation to production and broad adoption are facilitated by participating industry. Overall, the paper presents an overview of the project objectives and plans for the next four years.

  • Experimental validation of a plucked piezoelectric for underwater energy harvesting

     Toma, Daniel Mihai; Carbonell Ventura, Montserrat; Del Rio Fernandez, Joaquin; Bernet Piquet, Ferran; Mànuel-González, Bernat; Miquel Masalles, Jaume; Manuel Lazaro, Antonio
    Workshop in field of Nonlinear and Multiscale Dynamics of Smart Materials in Energy Harvesting Workshop
    Presentation's date: 2014-02-17
    Presentation of work at congresses

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  • Cursos FOAP-2013

     Del Rio Fernandez, Joaquin
    Competitive project

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    A new colorimetrically-calibrated automated video-imaging protocol for day-night fish counting at the OBSEA coastal cabled observatory  Open access

     Del Rio Fernandez, Joaquin; Aguzzi, Jacopo; Costa, Corrado; Menesatti, Paolo; Sbragaglia, Valerio; Nogueras Cervera, Marc; Sardá Amills, Francesc; Manuel Lazaro, Antonio
    Sensors
    Vol. 13, num. 11, p. 14740-14753
    DOI: 10.3390/s131114740
    Date of publication: 2013-10-30
    Journal article

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    Field measurements of the swimming activity rhythms of fishes are scant due to the difficulty of counting individuals at a high frequency over a long period of time. Cabled observatory video monitoring allows such a sampling at a high frequency over unlimited periods of time. Unfortunately, automation for the extraction of biological information (i.e., animals’ visual counts per unit of time) is still a major bottleneck. In this study, we describe a new automated video-imaging protocol for the 24-h continuous counting of fishes in colorimetrically calibrated time-lapse photographic outputs, taken by a shallow water (20 m depth) cabled video-platform, the OBSEA. The spectral reflectance value for each patch was measured between 400 to 700 nm and then converted into standard RGB, used as a reference for all subsequent calibrations. All the images were acquired within a standardized Region Of Interest (ROI), represented by a 2 × 2 m methacrylate panel, endowed with a 9-colour calibration chart, and calibrated using the recently implemented “3D Thin-Plate Spline” warping approach in order to numerically define color by its coordinates in n-dimensional space. That operation was repeated on a subset of images, 500 images as a training set, manually selected since acquired under optimum visibility conditions. All images plus those for the training set were ordered together through Principal Component Analysis allowing the selection of 614 images (67.6%) out of 908 as a total corresponding to 18 days (at 30 min frequency). The Roberts operator (used in image processing and computer vision for edge detection) was used to highlights regions of high spatial colour gradient corresponding to fishes’ bodies. Time series in manual and visual counts were compared together for efficiency evaluation...

    Field measurements of the swimming activity rhythms of fishes are scant due to the difficulty of counting individuals at a high frequency over a long period of time. Cabled observatory video monitoring allows such a sampling at a high frequency over unlimited periods of time. Unfortunately, automation for the extraction of biological information (i.e., animals’ visual counts per unit of time) is still a major bottleneck. In this study, we describe a new automated video-imaging protocol for the 24-h continuous counting of fishes in colorimetrically calibrated time-lapse photographic outputs, taken by a shallow water (20 m depth) cabled video-platform, the OBSEA. The spectral reflectance value for each patch was measured between 400 to 700 nm and then converted into standard RGB, used as a reference for all subsequent calibrations. All the images were acquired within a standardized Region Of Interest (ROI), represented by a 2 × 2 m methacrylate panel, endowed with a 9-colour calibration chart, and calibrated using the recently implemented “3D Thin-Plate Spline” warping approach in order to numerically define color by its coordinates in n-dimensional space. That operation was repeated on a subset of images, 500 images as a training set, manually selected since acquired under optimum visibility conditions. All images plus those for the training set were ordered together through Principal Component Analysis allowing the selection of 614 images (67.6%) out of 908 as a total corresponding to 18 days (at 30 min frequency). The Roberts operator (used in image processing and computer vision for edge detection) was used to highlights regions of high spatial colour gradient corresponding to fishes’ bodies. Time series in manual and visual counts were compared together for efficiency evaluation. Periodogram and waveform analysis outputs provided very similar results, although quantified parameters in relation to the strength of respective rhythms were different. Results indicate that automation efficiency is limited by optimum visibility conditions. Data sets from manual counting present the larger day-night fluctuations in comparison to those derived from automation. This comparison indicates that the automation protocol subestimate fish numbers but it is anyway suitable for the study of community activity rhythms.

  • Western Mediterranean Observatory OBSEA updates. 2nd junction box deployment, Citizen Science Project and others

     Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; Manuel Lazaro, Antonio; Olive Duran, Joaquim; Nogueras Cervera, Marc; Cadena Muñoz, Javier
    EMSO Conference
    p. 25
    Presentation's date: 2013-10-14
    Presentation of work at congresses

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    The expandable SEAfloor OBservatory (OBSEA; www.obsea.es) is a multiparametric cabled video-platform located in shalow waters at 20 m depth 4 km offshore Vilanova i la Geltrú (Catalonia, Spain) in front of an artificial reef and , interconnected to the coast by an energy and communication mixed cable. Obsea has two permanent sampling sites: on the surface (buoy) from 2011, and another one at the seafloor (cabled observatories) deployed in 2009. A new cabled and very light and movable junction box connected to the first one will be deployed during 2013. It will expand research and test capabilities to the observatory. OBSEA enables remote, long-term, and continuous surveys of the local ecosystem by acquiring synchronous multiparametric habitat data and bio-data with the following sensors: Conductivity- Temperature-Depth (CTD) sensors for salinity, temperature, pressure and pH; Acoustic Doppler Current Profilers (ADCP) for current speed and direction, including a turbidity meter and a fluorometer (for the determination of chlorophyll concentration); a hydrophone; a seismometer, a video camera for automated image analysis in relation to species classification and tracking and finally a buoy in the surface with meteorological station and video camera. Images collected from a cabled video-observatory were utilized to examine habitat utilization by coastal fishes. Hidrophone data is used to bioacoustics and ambient noise studies. Last deployments at Obsea: A new very low cost, low size and low power consumption OFDM (Orthogonal Frequency Division Multiplexing) transmitters for underwater sensor networks communication research has been installed at Obsea. A new specific system for the measurement of marine pH and atmospheric CO2 for the evaluation of ocean acidification. An underwater cabled seismometer implementing the IEEE Std 1588 have been developed and validated to work in network systems such as the OBSEA. Integrated with land-based networks by transmitting real- time data to Institut Geològic de Catalunya.

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    Good practice guide for C calculation  Open access

     Garcia Benadí, Albert; Cadena Muñoz, Francisco Javier; Sarria Gandul, David; Sitjar Cañellas, Rafael; Del Rio Fernandez, Joaquin
    International Workshop on Marine Technology
    p. 61-66
    Presentation's date: 2013-10-11
    Presentation of work at congresses

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    The aim of this paper is to detail the procedure to calculate the C parameter in the spreading factor. This factor is the most important because is the main reason of the pressure level fall. Calculating the C parameter with more accuracy it provides better information of the environment.

    The aim of this paper is to detail the procedure to calculate the C parameter in the spreading factor. This factor is the most important because is the main reason of the pressure level fall. Calculating the C parameter with more accuracy it provides better information of the environment

  • Latest contributions to Guanay II

     Masmitja Rusiñol, Ivan; Gonzalez Agudelo, Julian; Gomariz Castro, Spartacus; Prat Tasias, Jordi; Del Rio Fernandez, Joaquin
    International Workshop on Marine Technology
    Presentation's date: 2013-10-10
    Presentation of work at congresses

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    This work presents the last contributions incorporated into AUV Guanay II, these have been emerged after some test fields, tests in the swimming pool and in the ocean, such as Mar Menor and Mar Mediterrani. These improvements are: First in the communication and control systems, for a more fluid communication a WiFi system has been incorporated, this allows access to PC-104 of Guanay II without disassemble it; second, a new RF system to connect and disconnect the electronics and a new method to charge the batteries have been designed; third, a new driver for lateral motor has been developed that allows control the motor in both directions; then the software of the vehicle and the base station has been upgraded to obtain a major and better user control; finally, a new ballast system has been incorporated. All of new contributions have been tested in the laboratory and in the field.

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    Interoperability developments for next generation multifunctional ocean sensor systems in NeXOS  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio; Moreno Lupiañez, Manuel; Bröring, Arne; Pearlman, Jay S; Delory, Eric
    International Workshop on Marine Technology
    p. 166-168
    Presentation's date: 2013-10-10
    Presentation of work at congresses

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    Sensor technology is rapidly advancing, enabling smaller and less expensive instruments to monitor Earth’s environment. It is expected that many more kinds and quantities of networked environmental sensors will be deployed in coming years. This work presents an approach for the smart configuration and integration of marine sensors into an interoperable Sensor Web infrastructure such that the overall life cycle cost of sensors and observing systems is reduced and data has greater societal and scientific value. In this paper some of the objectives related to sensor interface included in the project proposal NeXOS (Next generation, Cost-effective, Compact, Multifunctional Web Enabled Ocean Sensor Systems Empowering Marine, Maritime and Fisheries Management), under the European Commission’s Ocean of Tomorrow call FP7- OCEAN-2013.2, are presented.

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    OBSEA’s seismic station joins the IGC network  Open access

     Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; Cadena Muñoz, Javier; Segalas Coral, Jordi; Prat Farran, Joana d'Arc; Jara Salvador, José Antonio; Frontera Genovard, Tànit; Olivera Lloret, Carme; Goula Suriñach, Xavier
    International Workshop on Marine Technology
    p. 161-165
    Presentation's date: 2013-10-10
    Presentation of work at congresses

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    A cabled system for collecting real-time seismic data has been developed and was deployed in spring of 2011. Nowadays (2013) this seismic station is being part of the Catalan Seismic Network managed by the IGC (Institut Geològic de Catalunya). The seismic system is part of Western Mediterranean Cabled Observatory, OBSEA (www.obsea.es). A key component in this cabled system is the use of IEEE 1588 standard that serves as a clock synchronization mechanism for the seismometer with Universal Time Coordinates (UTC) clock. This paper presents the seismic measurements results of the broadband seismometer. The seismic data are time stamped using a UTC clock which is traceable to within the desired level of precision of sub milliseconds through IEEE 1588 protocol.

    A cabled system for collecting real-time seismic data has been developed and was deployed in spring of 2011. Nowadays (2013) this seismic station is being part of the Catalan Seismic Network managed by the IGC (Institut Geològic de Catalunya). The seismic system is part of Western Mediterranean Cabled Observatory, OBSEA (www.obsea.es). A key component in this cabled system is the use of IEEE 1588 standard that serves as a clock synchronization mechanism for the seismometer with Universal Time Coordinates (UTC) clock. This paper presents the seismic measurements results of the broadband seismometer. The seismic data are time stamped using a UTC clock which is traceable to within the desired level of precision of sub milliseconds through IEEE 1588 protocol.

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    Preliminary results of the OBSEA Citizen Science project  Open access

     Bghiel, Ikram; Del Rio Fernandez, Joaquin; Hidalgo Castro, Alberto; Toma, Daniel Mihai; Manuel Lazaro, Antonio; Aguzzi, Jacopo
    International Workshop on Marine Technology
    p. 98-100
    Presentation's date: 2013-10-09
    Presentation of work at congresses

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    In this paper, the Citizen Science experience with the OBSEA costal-cabled video observatory, deployed in western Mediterranean [1] is presented. A local biodiversity survey is being conducted by citizens as generic non-experienced users, high school students, and amateur divers helping to identify and classify fishes appearing within different digital products such as time-lapse images and footages. Accordingly, we implemented a protocol for the web-based species identification supervised by scientists, in order to evaluate the different performances for each group.

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    Long term monitoring of day-night fish assemblage at OBSEA  Open access

     Santamaria Garcia, Guillermo; Aguzzi, Jacopo; Sbragaglia, Valerio; Del Rio Fernandez, Joaquin; Nogueras Cervera, Marc; Manuel Lazaro, Antonio; Sardá Amills, Francesc
    International Workshop on Marine Technology
    p. 58-60
    Presentation's date: 2013-10-09
    Presentation of work at congresses

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    High frequency monitoring and the reducing of disturbance of sampling activities have a vital importance in the study of fish communities. The aim of this paper is to describe temporal patterns in habitat utilization by a coastal fish assemblage throughout the year 2012. A high frequency long term photo identification monitoring has been carried out with this objective. At about 63.000 individuals representing 28 species were identified, suggesting the occurrence of different day-night rhythms among them. Future comparisons with physical parameters will be developed to get a better understanding of their movement patterns.

  • Operational multiparameter subsea observation platforms

     Manuel Lazaro, Antonio; Molino Minero Re, Erik; Del Rio Fernandez, Joaquin; Nogueras Cervera, Marc
    Date of publication: 2013-10
    Book chapter

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    New trends in experimental marine research require long term monitoring of the seas and oceans with higher data resolutions than those which can be obtained from oceanographic vessels, buoys or autonomous se nsors. Subsea observation platforms are the response to these needs. These infras tructures are complex systems, precisely designed to ensure they are flexible, robust and stable and also capable of managing a wide range of sensors and instruments in r eal time with minimum maintenance. Some of the most commonly used instruments fo r ocean research are based on optical and image sensors, and in this chapter we provi de a review of the key components of a subsea observatory and the main challenges facing optical and image sensors used in multidisciplinary and multiparameter underwater observatories.

    Postprint (author’s final draft)

  • Next generation, Cost-effective, Compact, Multifunctional Web Enabled

     Del Rio Fernandez, Joaquin
    Competitive project

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  • An ocean kinetic energy converter for low-power applications using piezoelectric disk elements

     Viñolo Monzoncillo, Carlos; Toma, Daniel Mihai; Manuel Lazaro, Antonio; Del Rio Fernandez, Joaquin
    European physical journal. Special topics
    Vol. 222, num. 7, p. 1685-1698
    DOI: 10.1140/epjst/e2013-01955-3
    Date of publication: 2013-09-30
    Journal article

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    The main problem facing long-term electronic system deployments in the sea, is to find a feasible way to supply them with the power they require. Harvesting mechanical energy from the ocean wave oscillations and converting it into electrical energy, provides an alternative method for creating self-contained power sources. However, the very low and varying frequency of ocean waves, which generally varies from 0.1 Hz to 2 Hz, presents a hurdle which has to be overcome if this mechanical energy is to be harvested. In this paper, a new sea wave kinetic energy converter is described using low-cost disk piezoelectric elements, which has no dependence on their excitement frequency, to feed low-consumption maritime-deployed electronic devices. The operating principles of the piezoelectric device technique are presented, including analytical formulations describing the transfer of energy. Finally, a prototypical design, which generates electrical energy from the motion of a buoy, is introduced. The paper concludes with the the behavior study of the piezoelectric prototype device as a power generator.