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  • 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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  • 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
    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.

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    Evaluation of the R&R and the compatibility index for non-independent measurements  Open access

     Garcia Benadí, Albert; Molino, Erik; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    International Journal of Metrology and Quality Engineering
    Date of publication: 2013-06-05
    Journal article

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    This paper describes the methodology of the compatibility criteria En and the methodology of repeatability and reproducibility (R&R) throught the average and range method. With this paper we will use the methodology R&R for the evaluation of the compatibility criteria between the staff of the laboratories, where independent measurements are not insured.

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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, C.; Menesatti, Paolo; Sbragaglia, Valerio; Nogueras Cervera, Marc; Sardá Amills, Francesc; Manuel Lazaro, Antonio
    Sensors
    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.

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    ¿Sabías que la altitud se define como la distancia vertical de un punto de la tierra al nivel del mar?  Open access

     Garcia Benadí, Albert; Del Rio Fernandez, Joaquin
    e-medida. Revista española de metrología
    Date of publication: 2013-07-11
    Journal article

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    La definición de altitud por la Real Academia de la lengua española es la distancia vertical de un punto de la tierra respecto al nivel del mar, que se identifica habitualmente con el acrónimo msnm (metros sobre el nivel del mar). Pero todos sabemos que el nivel del mar es variable por causa de las mareas, deshielo, fases lunares, posición geográfica, etc. Por ello ¿cómo podemos calcular la cota de referencia del nivel del mar?

    La definición de altitud por la Real Academia de la lengua española es la distancia vertical de un punto de la tierra respecto al nivel del mar, que se identifica habitualmente con el acrónimo msnm (metros sobre el nivel del mar). Pero todos sabemos que el nivel del mar es variable por causa de las mareas, deshielo, fases lunares, posición geográfica, etc. Por ello ¿cómo podemos calcular la cota de referencia del nivel del mar?

  • 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.

    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)

  • 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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    Simulations of a moored power cable at OBSEA platform  Open access

     Prat Farran, Joana d'Arc; Del Rio Fernandez, Joaquin
    OCEANS MTS/IEEE
    Presentation's date: 2013-06-12
    Presentation of work at congresses

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    New green energy sources deployed at sea in mobile platforms use power cables in order to transport green energy at sea surface to the bottom. Theses power cables are exposed to the dynamic behaviour of the platform movements due to waves, currents and wind. OBSEA is a seafloor cabled observatory at 20 m depth in front of Vilanova, in Catalan coast. OBSEA captures data in real time like current, waves and wind among others. In this paper, a model of a moored power cable installed at OBSEA is studied. The study is focused on the trajectory, tensions and deformation or curvature of cables about 0.1 m diameter and under real conditions collected from OBSEA sensors. Simulations are done with OrcaFlex 9.3 software (license N1594). This software allows to model underwater structures and cables.

    New green energy sources deployed at sea in mobile platforms use power cables in order to transport green energy at sea surface to the bottom. Theses power cables are exposed to the dynamic behaviour of the platform movements due to waves, currents and wind. OBSEA is a seafloor cabled observatory at 20 m depth in front of Vilanova, in Catalan coast. OBSEA captures data in real time like current, waves and wind among others. In this paper, a model of a moored power cable installed at OBSEA is studied. The study is focused on the trajectory, tensions and deformation or curvature of cables about 0.1 m diameter and under real conditions collected from OBSEA sensors. Simulations are done with OrcaFlex 9.3 software (license N1594). This software allows to model underwater structures and cables.

  • Mathematical model of the Guanay II AUV

     Gonzalez Agudelo, Julian; Masmitjà Rusinyol, Ivan; Gomariz Castro, Spartacus; Batlle Arnau, Carles; Sarria Gandul, David; Del Rio Fernandez, Joaquin
    OCEANS MTS/IEEE
    Presentation's date: 2013-06-12
    Presentation of work at congresses

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    This work presents a mathematical study to obtain the coefficients that define the dynamics of an autonomous underwater vehicle (AUV), the Guanay II vehicle, with 3 degrees of freedom. This dynamics is given by several forces and moments (hydrostatic, hydrodynamic, added masses and propellers), which largely depend on the vehicle geometry. The Guanay II AUV has been designed following a Myring profile, which improves the hydrodynamics of the vehicle but also yields a tractable mathematical model. The model describes the geometric characteristics of the vehicle and the disposition of the thrusters and has backward movement capacity. The model has been tested by means of simulations and a prototype has been validated in real navigation.

    This work presents a mathematical study to obtain the coefficients that define the dynamics of an autonomous underwater vehicle (AUV), the Guanay II vehicle, with 3 degrees of freedom. This dynamics is given by several forces and moments (hydrostatic, hydrodynamic, added masses and propellers), which largely depend on the vehicle geometry. The Guanay II AUV has been designed following a Myring profile,which improves the hydrodynamics of the vehicle but also yields a tractable mathematical model. The model describes the geometric characteristics of the vehicle and the disposition of the thrusters and has backward movement capacity. The model has been tested by means of simulations and a prototype has been validated in real navigation.

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    Preliminary OFDM based acoustic communication for underwater sensor networks synchronization  Open access

     Pallares Valls, Oriol; Sarria Gandul, David; Viñolo Monzoncillo, Carlos; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    OCEANS MTS/IEEE
    Presentation's date: 2013-06-12
    Presentation of work at congresses

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    This work presents a first approach to wireless underwater sensor networks UWSN time synchronization, using OFDM (Orthogonal Frequency Division Multiplexing) acoustic communication and time reference served by a synchronization protocol. This synchronization and type of modulation allows getting a low drift clock on each sensor, on a high efficiency underwater communication network.

    This work presents a first approach to wireless underwater sensor networks UWSN time synchronization, using OFDM (Orthogonal Frequency Division Multiplexing) acoustic communication and time reference served by a synchronization protocol. This synchronization and type of modulation allows getting a low drift clock on each sensor, on a high efficiency underwater communication network.

    Postprint (author’s final draft)

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    Sea motion electrical energy generator for low-power applications  Open access

     Viñolo Monzoncillo, Carlos; Toma, Daniel Mihai; Manuel Lazaro, Antonio; Del Rio Fernandez, Joaquin
    OCEANS MTS/IEEE
    Presentation's date: 2013-06-10
    Presentation of work at congresses

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    The main problematic about electronic systems deployed in the sea for long periods of time, is to find a feasible way to supply them with the necessary amount of power and no direct supervision. In this paper a new idea is proposed and studied to supply deep sea low-consumption devices using low-cost disk piezoelectric elements. These piezoelectric components, together with a horizontal balance-like physical pendulum, create an electrical power generator that harvests the mechanical energy brought by the sea movements, preferably from the heave and pitch motion that sea waves induce in a moored-floating body as might be a buoy. The main purpose of this system is to unrelate the rate of impacts to the piezoelectric material from its natural oscillation frequency, making it viable to harvest energy from a slow motion environment such as the sea. Equations relating the energy extr action are presented and different experimentations are worked out to characterize the piezo elements. Finally a prototype with a proposed electronic harvesting system is built and tested in a real medium, showing the results before concluding the article.

    he main problematic about electronic systems deployed in the sea for long periods of time, is to find a feasible way to supply them with the necessary amount of power and no direct supervision. In this paper a new idea is proposed and studied to supply deep sea low-consumption devices using low-cost disk piezoelectric elements. These piezoelectric compon ents, together with a horizontal balance-like physical pendulum, create an electrical power generator that harvests the mechanical energy brought by the sea movements, preferably from the heave and pitch motion that sea waves induce in a moored-floating body as might be a buoy. The main purpose of this system is to unrelate the rate of impacts to the piezoelectric material from its natural oscillation frequency, making it viable to harvest energy from a slow motion environment such as the sea. Equations relating the energy extr action are presented and different experimentations are worked out to characterize the piezo elements. Finally a prototype with a proposed electronic harvesting system is built and tested in a real medium, showing the results before concluding the article.

    Postprint (author’s final draft)

  • Good practice guide for C calculation

     Garcia Benadí, Albert; Cadena Muñoz, Francisco Javier; Sarria Gandul, David; Sitjar Cañellas, Rafael; Del Rio Fernandez, Joaquin
    International Workshop on Marine Technology
    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.

  • Preliminary results of the OBSEA Citizen Science project

     Bghiel, Ikram; Del Rio Fernandez, Joaquin; Hidalgo Castro, Alberto; Toma, Daniel Mihai; Manuel Lazaro, Antonio; Aguzzi, Jacopo
    International Workshop on Marine Technology
    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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    Empirical acoustic attenuation of the seawater  Open access

     Roset Juan, Francesc Xavier; Garcia Benadí, Albert; van der Schaar, Mike Connor Roger Malcolm; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    OCEANS MTS/IEEE
    Presentation's date: 2013-06-13
    Presentation of work at congresses

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    This study aims to estimate a model for the underwater acoustic environment in a Mediterranean area and to compare the model with existing other models of the sound attenuation in the zone of interest. The contribution of this paper is to develop a protocol to validate and adjust the offshore underwater attenuation models to a model of a Mediterranean area.

    This study aims to estimate a model for the underwater acoustic environment in a Mediterranean area and to compare the model with existing other models of the sound attenuation in the zone of interest. The contribution of this paper is to develop a protocol to validate and adjust the offshore underwater attenuation models to a model of a Mediterranean area.

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  • Citizen Science and marine community monitoring by video-cabled observatories: the OBSEA Citizen Science Project

     Del Rio Fernandez, Joaquin; Aguzzi, Jacopo; Hidalgo Castro, Alberto; Bghiel, Ikram; Manuel Lazaro, Antonio; Sbragaglia, Valerio; Sardà Amills, Francesc
    International Symposium on Underwater Technology
    Presentation's date: 2013-03-05
    Presentation of work at congresses

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    The Citizen Science refers to the public participation in scientific activities and research projects related with environment and its biodiversity are taking advantage of new technologies such us internet and mobile phones with recording capabilities for an easy data collection and sharing. In this paper, we presented a Citizen Science experience with the OBSEA costal-cabled video-observatory, deployed in western Mediterranean in 2009. A local biodiversity survey is going to be 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.

  • The use of coastal cabled video-observatories to monitor seasonal changes in shallow water fish community

     Sbragaglia, Valerio; Aguzzi, Jacopo; Santamaria, Josep; Manuel Lazaro, Antonio; Del Rio Fernandez, Joaquin; Nogueras Cervera, Marc; Sardà Amills, Francesc
    International Symposium on Underwater Technology
    Presentation's date: 2013-03-05
    Presentation of work at congresses

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    Automatic marine sensors services discovery on IP networks  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; O'Reilly, Thomas C.; Manuel Lazaro, Antonio
    OCEANS MTS/IEEE
    Presentation's date: 2013-06-11
    Presentation of work at congresses

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    Nowadays, the studies of episodic processes in the ocean is manly done through the innovative facilities called ocean observatories which provide unprecedented amounts of power and two-way bandwidth to access and control sensor networks in the oceans. The most capable ocean observatories are designed around a submarine fiber optic/power cable connecting one or more seafloor science nodes to the terrestrial power grid and communications backhaul. In a network consisting of tens, hundreds or thousands of marine sensors, manual configuration and integration becomes very challenging. Methods are required which support this task to minimize the administration efforts. This paper addresses this issue and presents an approach for the automatic discovery of marine sensors in ocean observatories. The work provides a needed reference implementation of PUCK over TCP/IP, and suggests the potential of a set of protocols and standards that could realize true end to end ¿Plug and Work¿ capability for sensor networks.

    Nowadays, the studies of episodic processes in the ocean is manly done through the innovative facilities called ocean observatories which provide unprecedented amounts of power and two-way bandwidth to access and control sensor networks in the oceans. The most capable ocean observatories are designed around a submarine fiber optic/power cable connecting one or more seafloor science nodes to the terrestrial power grid and communications backhaul. In a network consisting of tens, hundreds or thousands of marine sensors, manual configuration and integration becomes very challenging. Methods are required which support this task to minimize the administration efforts. This paper addresses this issue and presents an approach for the automatic discovery of marine sensors in ocean observatories. The work provides a needed reference implementation of PUCK over TCP/IP, and suggests the potential of a set of protocols and standards that could realize true end to end “Plug and Work” capability for sensor networks.

    Postprint (author’s final draft)

  • Contribution to COBS synchronization with PTP IEEE std. 1588

     Pallares Valls, Oriol; Cadena Muñoz, Francisco Javier; Carreras Pons, Normandino; Toma, Daniel Mihai; Del Rio Fernandez, Joaquin
    OCEANS MTS/IEEE
    Presentation's date: 2013-06-11
    Presentation of work at congresses

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    This work presents a cabled system for collecting real-time seismic data on the coastal zones. It is deployed in the Western Mediterranean Cabled Observatory, OBSEA (www.obsea.es). A key component in this cabled system, COBS, is the use of IEEE standard 1588 that serves as a clock synchronization mechanism for the seismometer with Universal Time Coordinates (UTC) clock. Delivering of accurate timing to the seismometer, the seismic data can be time stamped using a UTC clock which is traceable to within the desired level of precision of sub milliseconds necessary for an accurate location of an earthquake.

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    Low cost OFDM based transmitter for underwater acoustic communications  Open access

     Sarria Gandul, David; Pallares Valls, Oriol; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    OCEANS MTS/IEEE
    Presentation's date: 2013-06-12
    Presentation of work at congresses

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    On this work a low cost OFDM transmitter for underwater sensor networks is presented. The transmitter is based on a low power microcontroller that governs a DDS in order to generate the output data -OFDM symbols- avoiding the IFFT computations. This solution represents a new design perspective for the current UWSN -mainly based on FPGAs or DSPs, allowing to reduce the cost, the power consumption and the size of the current transmitters.

    On this work a low cost OFDM transmitter for underwater sensor networks is presented. The transmitter is based on a low power microcontroller that governs a DDS in order to generate the output data -OFDM symbols- avoiding the IFFT computations. This solution represents a new design perspective for the current UWSN -mainly based on FPGAs or DSPs, allowing to reduce the cost, the power consumption and the size of the current transmitters.

    Postprint (author’s final draft)

  • Measuring system and power management of the Guanay II AUV

     Masmitja Rusiñol, Ivan; Gonzalez Agudelo, Julian; Masmitjà, Gerard; Gomariz Castro, Spartacus; Del Rio Fernandez, Joaquin
    Symposium on Measurements of Electrical Quantities
    Presentation's date: 2013-07-18
    Presentation of work at congresses

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  • Precision timing in TDMA - based Wireless Sensor Network through IEEE 1588 standard

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio; Gomariz Castro, Spartacus; Carreras Pons, Normandino
    IMEKO World Congress
    Presentation's date: 2013-07-18
    Presentation of work at congresses

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    This paper proposes an energy-efficient time synchronization scheme for Wireless Sensor Networks (WSNs) based on the IEEE 1588 standard. Although a number of methods have been studied for time synchronization of WSNs, some applications require high precision time synchronization with very low power consumption. This paper presents a reduced implementation of IEEE 1588 precision time protocol (PTP) for WSNs. Within the proposed synchronization approach, a sensor node is synchronized using the timing message generated by a master node synchronized with GPS. This paper also presents experiments to evaluate the performance of the precision time synchronization of a slave-master pair of sensor nodes.

  • Interoperability developments for next generation multifunctional ocean sensor systems in NeXOS

     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
    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.

  • Long term monitoring of day-night fish assemblage at OBSEA

     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
    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.

  • OBSEA¿s seismic station joins the IGC network

     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
    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.

  • Interoperability developments for next generation multifunctional ocean sensor systems in NeXOS

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio; Moreno Lupiañez, Manuel; Bröring, Arne; Pearlman, Jay S; Delory, Eric
    Instrumentation viewpoint
    Date of publication: 2013-07-01
    Journal article

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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.

  • 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
    Instrumentation viewpoint
    Date of publication: 2013-07-01
    Journal article

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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.

  • Daily activity rhythms in temperate coastal fishes: insights from cabled observatory video monitoring

     Aguzzi, Jacopo; Sbragaglia, Valerio; Santamaria Garcia, Guillermo; Del Rio Fernandez, Joaquin; Sarda, Francesc; Nogueras Cervera, Marc; Manuel Lazaro, Antonio
    Marine ecology progress series
    Date of publication: 2013-07-12
    Journal article

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    The rhythmic behavior of marine species generates uncertainties in population and biodiversity assessments if the frequency of sampling is too low and irregular over time. Few attempts have been made to link community changes to the rhythmic behavior of individuals within populations. Cabled video observatories can be used to explore community changes over different temporal windows as a result of the activity rhythms of individuals within populations. In this study, 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. During 1 mo, 30 min daily count patterns were continuously measured and compared with the corresponding solar irradiance. A significant (p < 0.05) day-night patterning was observed in the majority of recognized taxa by Chi-Square periodogram analysis. Three types of rhythms were identified in waveform plotting: (1) diurnal (Chromis chromis, Coris julis, Diplodus annularis, D. cervinus, D. sargus, D. vulgaris, Serranus cabrilla, Dentex dentex, Symphodus sp.); (2) nocturnal (Atherina sp. and Scorpaena sp.); and (3) crepuscular (Apogon imberbis, Oblada melanura, and Spicara maena). Diurnal species clustered around maximum averaged irradiance (computed from a cosinor analysis). The results were discussed evaluating whether visual count time series represent a reliable proxy for the swimming activity rhythms of individuals and whether the complex habitat use of coastal fishes would require the use of spatial networks of cameras.

  • Good Practice Guide for calibrating a hydrophone "in situ"  Open access

     Garcia Benadí, Albert; Cadena Muñoz, Javier; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    INSTRUMENTATION VIEWPOINT
    Date of publication: 2013-07-01
    Journal article

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    Nowadays a multitude of tests performed in the marine environment such as the measurement of pH, CO2, etc. Some of the tests performed are the measurement of noise pollution as well as the study of cetaceans in the marine environment. To perform this type of test hydrophones are used. These devices are microphones for the marine environment. The calibration of this equipment is detailed in various standards such as [1] as a function of frequency. In our case we propose the calibration of the hydrophone in the marine environment, in situ. This method of calibration involves a considerable increase in the uncertainty, but in many cases this increment of the uncertainty compensates little investment in performing calibration. The aim of this paper is to provide the basis for the calibration of a hydrophone ¿in situ¿, thus assigning a value of uncertainty, which may be high, but according to requirements may be sufficient.

    The International Confederation of Metrology (IMEKO) is a non –governmental federation of 38 Member Organizations individually concerned with the advancement of measurement technology. Its fundamental objectives are the promotion of international interchange of scientific and technical information in the field of measurement and instrumentation and the enhancement of international co-operation among scientists and engineers from research and industry. The activity of IMEKO is basically carried out through the Technical Committees that organize symposia, conferences, workshops, and seminars, on specific topics at regular intervals. In 1984, IMEKO established the Technical Committee TC4, which emphasizes the theoretical and practical aspects of research in the field of electrical and electronic measurements. The TC4 organizes a symposium every year and cooperates actively in the success of IMEKO World Congress, held every three years. The activities of TC4 allowed more and more researchers to be familiar with the development and use of electrical and electronic instruments for measuring, monitoring and recording electrical signals. The 19th Symposium IMEKO TC4 intend to be the stage of discussions of subjects related to Electrical metrology and instrumentation, ensuring tools for the development of science and measurements technology, in the context of the so-called society of knowledge. The present issue of Instrumentation Viewpoint is devoted to the communications presented in the 19th Symposium on Measurement of Electrical Quantities, 17th Workshop on ADC/DAC Modelling and Testing and 5th Marine Technology Workshop which will be held in the city of Barcelona on July 2013. As a novelty, the 19th Symposium IMEKO TC4 expands the topics covered in previous editions in order to address issues related to marine technologies and applications, under umbrella of MARTECH 2013. We sincerely hope, that the 150 contributions that you will find in the next pages provide you information of your interest.

  • Good practice guide for c calculation  Open access

     Garcia Benadí, Albert; Cadena Muñoz, Javier; Sarria Gandul, David; Sitjar Cañellas, Rafael; Del Rio Fernandez, Joaquin
    Instrumentation viewpoint
    Date of publication: 2013-07-01
    Journal article

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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.

  • 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
    Instrumentation viewpoint
    Date of publication: 2013-07-01
    Journal article

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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 Uni - versal 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 millisec - onds through IEEE 1588 protocol.

  • 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
    Instrumentation viewpoint
    Date of publication: 2013-07-01
    Journal article

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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.

  • Precision timing in TDMA-based Wireless Sensor Network through IEEE 1588 standard  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    INSTRUMENTATION VIEWPOINT
    Date of publication: 2013-07-01
    Journal article

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    This paper proposes an energy-efficient time synchronization scheme for Wireless Sensor Networks (WSNs) based on the IEEE 1588 standard. Although a number of methods have been studied for time synchronization of WSNs, some applications require high precision time synchronization with very low power consumption. This paper presents a reduced implementation of IEEE 1588 precision time protocol (PTP) for WSNs. Within the proposed synchronization approach, a sensor node is synchronized using the timing message generated by a master node synchronized with GPS. This paper also presents experiments to evaluate the performance of the precision time synchronization of a slave-master pair of sensor nodes.

    The International Confederation of Metrology (IMEKO) is a non –governmental federation of 38 Member Organizations individually concerned with the advancement of measurement technology. Its fundamental objectives are the promotion of international interchange of scientific and technical information in the field of measurement and instrumentation and the enhancement of international co-operation among scientists and engineers from research and industry. The activity of IMEKO is basically carried out through the Technical Committees that organize symposia, conferences, workshops, and seminars, on specific topics at regular intervals. In 1984, IMEKO established the Technical Committee TC4, which emphasizes the theoretical and practical aspects of research in the field of electrical and electronic measurements. The TC4 organizes a symposium every year and cooperates actively in the success of IMEKO World Congress, held every three years. The activities of TC4 allowed more and more researchers to be familiar with the development and use of electrical and electronic instruments for measuring, monitoring and recording electrical signals. The 19th Symposium IMEKO TC4 intend to be the stage of discussions of subjects related to Electrical metrology and instrumentation, ensuring tools for the development of science and measurements technology, in the context of the so-called society of knowledge. The present issue of Instrumentation Viewpoint is devoted to the communications presented in the 19th Symposium on Measurement of Electrical Quantities, 17th Workshop on ADC/DAC Modelling and Testing and 5th Marine Technology Workshop which will be held in the city of Barcelona on July 2013. As a novelty, the 19th Symposium IMEKO TC4 expands the topics covered in previous editions in order to address issues related to marine technologies and applications, under umbrella of MARTECH 2013. We sincerely hope, that the 150 contributions that you will find in the next pages provide you information of your interest.

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

     Del Rio Fernandez, Joaquin
    Participation in a competitive project

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  • Cursos FOAP-2013

     Del Rio Fernandez, Joaquin
    Participation in a competitive project

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  • Fixed Point Open Ocean Observatories Network

     Del Rio Fernandez, Joaquin
    Participation in a competitive project

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  • OGC Location Standards for Next Generation LBS

     Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; Bghiel, Ikram
    Collaboration in exhibitions

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    AUV based multi-vehicle collaboration: Salinity studies in Mar Menor coastal lagoon  Open access

     Gonzalez Agudelo, Julian; Masmitja, Ivan; Gomariz Castro, Spartacus; Molino, Erik; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio; Busquets, J; Guerrero, A; Lopez, F; Carreras, M; Ribas, D; Carrera, A; Candela, C; Ridao, P; Sousa, J; Calado, P; Pinto, J; Sousa, A; Martins, R; Borrajo, D; Olaya, A; Garau, B; Gonzalez, I; Torres, S; Rajan, R; McCann, M; Gilabert Cervera, Javier
    IFAC Workshop on Navigation, Guidance and Control of Underwater Vehicles
    Presentation's date: 2012-04-10
    Presentation of work at congresses

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    An experiment with different AUVs was carried out in the Mar Menor Coastal Lagoon from October 31 to November 5 in order to measure and assess the influence of the water from the Mar Menor on the adjacent area of the Mediterranean. This was carried out as a result of the meeting held between several institutions from the Iberian Peninsula and EEUU (see Vilanova Marine Science/Robotics Meeting 2010). The experiment was to launch several AUVs at the same time in different zones of the Mediterranean and Mar Menor lagoon. AUVs took salinity data trying to do a coordinated mission during two operative days (November 3 and November 5). Others days of the experiment were used to the vehicle’s preparation and error correction (November 2 and November 4). This paper presents the steps followed in preparation and operative days with the set of AUVs. This paper presents also the salinity results obtained during these missions.

  • The Open Geospatial Consortium PUCK standard: building sensor networks with self-describing instruments

     O'Reilly, Thomas C.; Broering, Arne; Del Rio Fernandez, Joaquin; Headley, K.; Bermúdez, Luis E.; Edgington, D.R.; Fredericks, Janet J.; Manuel Lazaro, Antonio; Toma, Daniel Mihai
    American Geophysical Union Fall Meeting
    Presentation's date: 2012-12-05
    Presentation of work at congresses

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  • Self-powered high-rate wireless sensor network for underground high voltage power lines

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    IEEE International Instrumentation and Measurement Technology Conference
    Presentation's date: 2012-05-01
    Presentation of work at congresses

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    The use of Wireless Sensor Networks (WSNs) are a promising technology that can enhance various aspects of today’s electric power systems, including generation, delivery, and utilization, making them a vital component of the next-generation electric power system, the smart grid. However, harsh and complex electric-power-system environments pose great challenges in the reliability of WSN communications in smartgrid applications. This paper presents wireless sensors with magnetic harvesting capabilities deployed along Underground High Voltage Power Lines (UHVPL) to allow long-lasting operation. The paper includes an overview of the communication protocol that optimizes sensor node coordination in linear array arrangements. Based on an optimal time synchronization method, the wireless sensors can self-adjust the communication timing in order to minimize the total power consumption. In addition, the paper provides a description of a linear sensor network under test, the results and discussions concerning network reliability and power efficiency.

  • Access to the full text
    Evaluation of the R&R and the compatibility index for non-independent measurements  Open access

     Garcia Benadí, Albert; Molino Minero Re, Erik; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    IMEKO World Congress
    Presentation's date: 2012-09-13
    Presentation of work at congresses

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    This paper describes the methodology of the compatibility criteria “En” and the methodology of R&R. With this paper we’ll use the methodology R&R for the evaluation of the compatibility criteria between the staff of the laboratories, where independent measurements aren’t insured.

  • Access to the full text
    Salinity studies in mar Menor using Guanay II AUV  Open access

     Gonzalez Agudelo, Julian; Masmitja Rusinyol, Ivan; Del Rio Fernandez, Joaquin; Gomariz Castro, Spartacus
    Instrumentation viewpoint
    Date of publication: 2012-01-01
    Journal article

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  • Sea waves energy harvester based on impacts  Open access

     Viñolo Monzoncillo, Carlos; Manuel Lazaro, Antonio; Del Rio Fernandez, Joaquin; Toma, Daniel Mihai
    Instrumentation viewpoint
    Date of publication: 2012-12-01
    Journal article

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    The main problematic about electronic systems deployed in the sea for long periods of time, is to find a feasible way to supply them with the necessary amount of power without the necessity of a periodical supervision. Small systems, such as sensors that belong to a net of milliwatts consuming devices extended in a wide area, cannot be wire-fed because of the inconveniences it might create, and they usually include a battery that cannot be on-field recharged. For this reason, energy harvesting is considered a great solution in order to create independent, self-sufficient, wireless and small underwater systems. One of the possible ways to obtain energy within, and directly from the sea, is taking advantage of the naturally created sea movements. This paper discusses this innovational idea and presents some worked out laboratory tests.

  • Access to the full text
    Data acquisition system for volcanic seismic  Open access

     Carreras Pons, Normandino; Gomariz Castro, Spartacus; Parisi Baradad, Vicenç; Del Rio Fernandez, Joaquin
    Instrumentation viewpoint
    Date of publication: 2012-12-01
    Journal article

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    This paper presents a design that is being created for the acquisition of volcanic seismic data. This system is composed by a microcontroller to management the peripherals, a module to acquire the information of seismic sensor and the module of communications that is composed of the RF and the GPS system. The prototype will be a very low power system and it will allow work during a complete year.

  • Seasonal rhythm in a Mediterranean coastal fish community as monitored by a cabled observatory

     Condal, Fernando; Aguzzi, Jacopo; Sardà Amills, Francesc; Nogueras Cervera, Marc; Cadena Muñoz, Francisco Javier; Costa, Corrado; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    Marine biology
    Date of publication: 2012-08-23
    Journal article

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    To adequately describe seasonal rhythms in habitat utilization by fish communities, observations are needed that occur at a relatively high frequency and over large temporal windows. For the first time, images collected from a cabled video-observatory (the western Mediterranean expandable SEAfloor OBservatory; OBSEA) were utilized to examine habitat utilization by coastal fishes. Over the course of a year, hourly digital images of the water column and an artificial reef were obtained during daylight hours. For each image, the total number of species, an estimate of the abundance of individuals, and the Shannon Diversity Index were quantified. A total of 22 fish species commonly associated with nearshore western Mediterranean habitats were identified, and significant spatial (water column vs. artificial reef), seasonal (spring, summer, autumn, and winter), and daily (morning, midday, and sunset) differences in habitat utilization occurred. Four species (Diplodus vulgaris, Diplodus cervinus, Diplodus sargus, and Scorpaena porcus) were associated with the artificial reef, while one species (Pagrus pagrus) chiefly occurred in the water column. Chromis chromis and Diplodus annularis occurred at the site more frequently in the winter and autumn, respectively, while 14 other species utilized the site more frequently in either the spring (8 spp) or summer (6 spp). In addition, Dentex dentex and Spicara maena occurred more frequently at sunset, while D. cervinus displayed a crepuscular rhythm (occurring more frequently in the morning and at sunset). Species diversity was highest in the summer and lowest in the winter. If not taken into account when planning in situ sampling, such seasonal and/or diel differences may lead to spurious estimates of population sizes and biodiversity. We suggest that cabled video-observatories offer a non-invasive and reliable technology for faunistic sampling and population assessment in coastal water of the Mediterranean and likely elsewhere.

  • Energy-efficient communication protocol in linear wireless sensor networks  Open access

     Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio; Toma, Daniel Mihai
    Instrumentation viewpoint
    Date of publication: 2012-12-01
    Journal article

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    Wireless sensor networks (WSNs) have been widely recognized as a promising technology that can enhance various aspects of structure monitoring and border surveillance. Typical applications, such as sensors embedded in the outer surface of a pipeline or mounted along the supporting structure of a bridge, feature a linear sensor arrangement. Economical power use of sensor nodes is essential for long-lasting operation. In this paper, we present wireless High-Level Data Link Control (HDLC) a novel approach to energy-efficient data routing to a single control center in a linear sensor topology. Applying 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.

  • Buoy controller and communication with OBSEA  Open access

     Artero Delgado, Carola; Nogueras Cervera, Marc; Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; Molino Minero Re, Erik; Sarria Gandul, David; Viñolo Monzoncillo, Carlos; Manuel Lazaro, Antonio
    Instrumentation viewpoint
    Date of publication: 2012-01-01
    Journal article

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    Following our traditional edition line, on this issue our magazine presents the annual summary of the different projects and research activities developed by SARTI research group during 2011. The research projects undertaken by SARTI, in collaboration with other Spanish and international research teams, are linked to the development of instrumentation technology for marine applications, as well as for general industry. SARTI, as research group of the Universitat Politècnica de Catalunya, began its work in 2000. Now with 12 years of activity, is the right time to introduce the issue number 12 of our Instrumentation ViewPoint magazine. We encourage you to collaborate in future issues of this journal, and to attend the next congress: INTERNATIONAL WORKSHOP ON MARINE TECHNOLOGY, MARTECH 2013.

  • Calibration process for CTD_(Conductivity, Temperature and Depth) at temperature  Open access

     Garcia Benadí, Albert; Molino Minero Re, Erik; Manuel Lazaro, Antonio; Del Rio Fernandez, Joaquin
    Instrumentation viewpoint
    Date of publication: 2012-01-01
    Journal article

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    Following our traditional edition line, on this issue our magazine presents the annual summary of the different projects and research activities developed by SARTI research group during 2011. The research projects undertaken by SARTI, in collaboration with other Spanish and international research teams, are linked to the development of instrumentation technology for marine applications, as well as for general industry. SARTI, as research group of the Universitat Politècnica de Catalunya, began its work in 2000. Now with 12 years of activity, is the right time to introduce the issue number 12 of our Instrumentation ViewPoint magazine. We encourage you to collaborate in future issues of this journal, and to attend the next congress: INTERNATIONAL WORKSHOP ON MARINE TECHNOLOGY, MARTECH 2013.

  • Ocean Bottom Seismometer: Design and Test of a Measurement System for Marine Seismology

     Garcia Benadí, Albert; Manuel Lazaro, Antonio; Del Rio Fernandez, Joaquin; Roset Juan, Francesc Xavier; Toma, Daniel Mihai; Carreras Pons, Normandino; Cadena Muñoz, Francisco Javier
    Sensors
    Date of publication: 2012-03-19
    Journal article

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  • Wireless sensor network for smart grid transmission system  Open access

     Toma, Daniel Mihai; Del Rio Fernandez, Joaquin; Manuel Lazaro, Antonio
    Instrumentation viewpoint
    Date of publication: 2012-01-01
    Journal article

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    Following our traditional edition line, on this issue our magazine presents the annual summary of the different projects and research activities developed by SARTI research group during 2011. The research projects undertaken by SARTI, in collaboration with other Spanish and international research teams, are linked to the development of instrumentation technology for marine applications, as well as for general industry. SARTI, as research group of the Universitat Politècnica de Catalunya, began its work in 2000. Now with 12 years of activity, is the right time to introduce the issue number 12 of our Instrumentation ViewPoint magazine. We encourage you to collaborate in future issues of this journal, and to attend the next congress: INTERNATIONAL WORKSHOP ON MARINE TECHNOLOGY, MARTECH 2013.

  • PUCK protocol use case at Obsea. PUCK is the newest OGC standard for instrument identification and communication  Open access

     Del Rio Fernandez, Joaquin; Toma, Daniel Mihai; O'Reilly, Thomas C.; Bröring, Arne; Dana, David R.; Bache, Félix; Headley, K.; Manuel Lazaro, Antonio; Edgington, D.R.
    Instrumentation viewpoint
    Date of publication: 2012-01-01
    Journal article

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    Following our traditional edition line, on this issue our magazine presents the annual summary of the different projects and research activities developed by SARTI research group during 2011. The research projects undertaken by SARTI, in collaboration with other Spanish and international research teams, are linked to the development of instrumentation technology for marine applications, as well as for general industry. SARTI, as research group of the Universitat Politècnica de Catalunya, began its work in 2000. Now with 12 years of activity, is the right time to introduce the issue number 12 of our Instrumentation ViewPoint magazine. We encourage you to collaborate in future issues of this journal, and to attend the next congress: INTERNATIONAL WORKSHOP ON MARINE TECHNOLOGY, MARTECH 2013.