http://hdl.handle.net/2117/3659 Sat, 25 May 2013 22:36:06 GMT 2013-05-25T22:36:06Z webmaster.bupc@upc.edu Universitat Politècnica de Catalunya. Servei de Biblioteques i Documentació no http://hdl.handle.net/2117/18391 Title: Citizen Science and marine community monitoring by video-cabled observatories: the OBSEA Citizen Science Project Authors: Río Fernandez, Joaquín del; Aguzzi, Jacopo; Hidalgo Castro, Alberto; Bghiel, Ikram; Manuel Lázaro, Antonio; Sbragaglia, Valerio; Sardà Amills, Francesc Abstract: 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. Tue, 19 Mar 2013 10:53:13 GMT http://hdl.handle.net/2117/18391 2013-03-19T10:53:13Z Río Fernandez, Joaquín del; Aguzzi, Jacopo; Hidalgo Castro, Alberto; Bghiel, Ikram; Manuel Lázaro, Antonio; Sbragaglia, Valerio; Sardà Amills, Francesc no 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. http://hdl.handle.net/2117/18388 Title: The use of coastal cabled video-observatories to monitor seasonal changes in shallow water fish community Authors: Sbragaglia, Valerio; Aguzzi, Jacopo; Santamaria, Josep; Manuel Lázaro, Antonio; Río Fernandez, Joaquín del; Nogueras Cervera, Marc; Sardà Amills, Francesc Tue, 19 Mar 2013 09:59:32 GMT http://hdl.handle.net/2117/18388 2013-03-19T09:59:32Z Sbragaglia, Valerio; Aguzzi, Jacopo; Santamaria, Josep; Manuel Lázaro, Antonio; Río Fernandez, Joaquín del; Nogueras Cervera, Marc; Sardà Amills, Francesc no http://hdl.handle.net/2117/17640 Title: Near-bottom sediment dynamics on highly-protected beaches The Coastal Ocean Observatory of Barcelona Authors: Antonijuan Rull, Josefina; Guillen, J.; López, Laura; Simarro Grande, Gonzalo Abstract: This article presents some preliminary results of the sedimentary dynamics measured during 5 months in Barcelona city beaches (NW Mediterranean). Wave storms, resuspension events and near-bottom sediment fluxes are analyzed in order to characterize the sedimentary behavior of highly-protected beaches. Mon, 11 Feb 2013 16:48:14 GMT http://hdl.handle.net/2117/17640 2013-02-11T16:48:14Z Antonijuan Rull, Josefina; Guillen, J.; López, Laura; Simarro Grande, Gonzalo no This article presents some preliminary results of the sedimentary dynamics measured during 5 months in Barcelona city beaches (NW Mediterranean). Wave storms, resuspension events and near-bottom sediment fluxes are analyzed in order to characterize the sedimentary behavior of highly-protected beaches. http://hdl.handle.net/2117/17611 Title: Data acquisition system for volcanic seismic Authors: Carreras Pons, Normandino; Gomáriz Castro, Spartacus; Parisi Baradad, Vicenç; Río Fernandez, Joaquín del Abstract: 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. Fri, 08 Feb 2013 13:15:42 GMT http://hdl.handle.net/2117/17611 2013-02-08T13:15:42Z Carreras Pons, Normandino; Gomáriz Castro, Spartacus; Parisi Baradad, Vicenç; Río Fernandez, Joaquín del no 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. http://hdl.handle.net/2117/16992 Title: Efficient implementation with FIR filters of operators based on B-splines to represent and classify signals of one and two dimensions Authors: Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç Thu, 22 Nov 2012 09:39:01 GMT http://hdl.handle.net/2117/16992 2012-11-22T09:39:01Z Ferrer Arnau, Luis Jorge; Parisi Baradad, Vicenç no http://hdl.handle.net/2117/16699 Title: AUV based multi-vehicle collaboration: Salinity studies in Mar Menor coastal lagoon Authors: Lopez, F; González Agudelo, Julián; Masmitja, Ivan; Gomáriz Castro, Spartacus; Molino, Erik; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio; Busquets, J; Guerrero, A; Martins, R; Sousa, A; Pinto, J; Calado, P; Sousa, J; Ridao, P; Candela, C; Carrera, A; Ribas, D; Carreras, M; Borrajo, D; Gilabert, J; Rajan, R; McCann, M; Gonzalez, I; Torres, S; Olaya, A; Garau, B Abstract: 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. Tue, 09 Oct 2012 18:26:01 GMT http://hdl.handle.net/2117/16699 2012-10-09T18:26:01Z Lopez, F; González Agudelo, Julián; Masmitja, Ivan; Gomáriz Castro, Spartacus; Molino, Erik; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio; Busquets, J; Guerrero, A; Martins, R; Sousa, A; Pinto, J; Calado, P; Sousa, J; Ridao, P; Candela, C; Carrera, A; Ribas, D; Carreras, M; Borrajo, D; Gilabert, J; Rajan, R; McCann, M; Gonzalez, I; Torres, S; Olaya, A; Garau, B no 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. http://hdl.handle.net/2117/16586 Title: Evaluation of the R&R and the compatibility index for non-independent measurements Authors: Garcia Benadí, Albert; Molino Minero, Erik; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio Abstract: 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. Wed, 26 Sep 2012 12:38:02 GMT http://hdl.handle.net/2117/16586 2012-09-26T12:38:02Z Garcia Benadí, Albert; Molino Minero, Erik; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio no 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. http://hdl.handle.net/2117/16027 Title: Limitations of linear control for Cormoran-AUV Authors: González Agudelo, Julián; Benezra, Andreina; Gomáriz Castro, Spartacus; Sarriá Gandul, David Abstract: This work shows a mathematic calculation of the hydrodynamic model for the Cormoran-AUV, together with a linear controller which is valid in a certain range of speeds. It also presents the navigation instruments needed to work correctly. The mathematic model has been simplified to three degrees of freedom of movement and the whole system has been simulated using the Matlab Simulink Software. The system has been linearized for different velocities to design a linear control PD for each one of them. The performance of each PD controller is studied, and some limitations in the implementation of the control have been detected. For the case of low speeds, the desired path doesn’t reach the goals of control’s design using the non-linear model. This behavior motivated the search of a valid range of speeds for the nonlinear model. Different paths have been simulated using this control and their results have been compared trhough the performance in the rising time and the establish time. Tue, 12 Jun 2012 13:58:22 GMT http://hdl.handle.net/2117/16027 2012-06-12T13:58:22Z González Agudelo, Julián; Benezra, Andreina; Gomáriz Castro, Spartacus; Sarriá Gandul, David no This work shows a mathematic calculation of the hydrodynamic model for the Cormoran-AUV, together with a linear controller which is valid in a certain range of speeds. It also presents the navigation instruments needed to work correctly. The mathematic model has been simplified to three degrees of freedom of movement and the whole system has been simulated using the Matlab Simulink Software. The system has been linearized for different velocities to design a linear control PD for each one of them. The performance of each PD controller is studied, and some limitations in the implementation of the control have been detected. For the case of low speeds, the desired path doesn’t reach the goals of control’s design using the non-linear model. This behavior motivated the search of a valid range of speeds for the nonlinear model. Different paths have been simulated using this control and their results have been compared trhough the performance in the rising time and the establish time. http://hdl.handle.net/2117/16012 Title: Near bottom sediment dynamics on highly protected beaches Authors: Antonijuan Rull, Josefina; Guillen, J.; López, Laura; Simarro Grande, Gonzalo Abstract: This article presents some preliminary results of the sedimentary dynamics measured during 5 months in Barcelona city beaches (NW Mediterranean). Wave storms, resuspension events and near-bottom sediment fluxes are analyzed in order to characterize the sedimentary behavior of highly-protected beaches. Mon, 11 Jun 2012 12:47:42 GMT http://hdl.handle.net/2117/16012 2012-06-11T12:47:42Z Antonijuan Rull, Josefina; Guillen, J.; López, Laura; Simarro Grande, Gonzalo no This article presents some preliminary results of the sedimentary dynamics measured during 5 months in Barcelona city beaches (NW Mediterranean). Wave storms, resuspension events and near-bottom sediment fluxes are analyzed in order to characterize the sedimentary behavior of highly-protected beaches. http://hdl.handle.net/2117/15915 Title: The Unit control of an acquisition system for ocean bottom seismometer (OBS) Authors: Carreras Pons, Normandino; Roset Juan, Francesc Xavier; Shariat Panahi, Shahram; Artero Delgado, Carola; Manuel Lázaro, Antonio; Owen, Tim; Antonijuan Rull, Josefina Abstract: In this paper we talk about an acquisition system for seismic data. The Ocean Bottom Seismometer (OBS) is equipment designed to obtain the seismic marine data from the seabed. The main part of this paper is based in an application which controls the acquisition data of four measurement channels. This system has been tested in lab, getting the corresponding results. Wed, 23 May 2012 13:58:56 GMT http://hdl.handle.net/2117/15915 2012-05-23T13:58:56Z Carreras Pons, Normandino; Roset Juan, Francesc Xavier; Shariat Panahi, Shahram; Artero Delgado, Carola; Manuel Lázaro, Antonio; Owen, Tim; Antonijuan Rull, Josefina no In this paper we talk about an acquisition system for seismic data. The Ocean Bottom Seismometer (OBS) is equipment designed to obtain the seismic marine data from the seabed. The main part of this paper is based in an application which controls the acquisition data of four measurement channels. This system has been tested in lab, getting the corresponding results. http://hdl.handle.net/2117/15914 Title: Piezoelectric energy harvesting from induced vortex in water flow Authors: Molino Minero, Erik; Carbonell Ventura, Montserrat; Fisac Fuentes, Carles; Manuel Lázaro, Antonio; Mihai Toma, Daniel Abstract: On this paper an evaluation of an energy harvesting system is presented. The system scavenges energy from a water flow using induced vortexes and piezoelectric materials. Cylinders of different size generate the vortexes and are attached to a cantilever that holds the piezoelectric generators. The evaluations consist on testing the performance of the cylinders and observe the frequencies and voltages generated. The preliminary results show that some of the configurations can generate a power of up to 0.31 μW. Wed, 23 May 2012 12:10:22 GMT http://hdl.handle.net/2117/15914 2012-05-23T12:10:22Z Molino Minero, Erik; Carbonell Ventura, Montserrat; Fisac Fuentes, Carles; Manuel Lázaro, Antonio; Mihai Toma, Daniel no On this paper an evaluation of an energy harvesting system is presented. The system scavenges energy from a water flow using induced vortexes and piezoelectric materials. Cylinders of different size generate the vortexes and are attached to a cantilever that holds the piezoelectric generators. The evaluations consist on testing the performance of the cylinders and observe the frequencies and voltages generated. The preliminary results show that some of the configurations can generate a power of up to 0.31 μW. http://hdl.handle.net/2117/15913 Title: Acoustic telemetry system for underwater sensors Authors: Sarriá Gandul, David; Molino Minero, Erik; Manuel Lázaro, Antonio Abstract: The design of an acoustic telemetry system is presented and evaluated. We describe the main characteristics of the communication system, the transmitter and the receiver. The scheme of the proposed design consists of autonomous sensors deployed underwater and networked using acoustics to a central node, which takes advantage of the infrastructure of sea-floor observatories to deliver data in real-time to a land station. The central node consists of a piezoelectric ceramic with custom signal conditioning and processing to demodulate and decode the data acquired by the distributed elements of the underwater network. Wed, 23 May 2012 11:24:39 GMT http://hdl.handle.net/2117/15913 2012-05-23T11:24:39Z Sarriá Gandul, David; Molino Minero, Erik; Manuel Lázaro, Antonio no The design of an acoustic telemetry system is presented and evaluated. We describe the main characteristics of the communication system, the transmitter and the receiver. The scheme of the proposed design consists of autonomous sensors deployed underwater and networked using acoustics to a central node, which takes advantage of the infrastructure of sea-floor observatories to deliver data in real-time to a land station. The central node consists of a piezoelectric ceramic with custom signal conditioning and processing to demodulate and decode the data acquired by the distributed elements of the underwater network. http://hdl.handle.net/2117/15910 Title: Self-powered high-rate wireless sensor network for underground high voltage power lines Authors: Mihai Toma, Daniel; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio Abstract: 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. Wed, 23 May 2012 10:57:57 GMT http://hdl.handle.net/2117/15910 2012-05-23T10:57:57Z Mihai Toma, Daniel; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio no 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. http://hdl.handle.net/2117/15532 Title: Hydrodynamic model, simulation and linear control for Cormoran-AUV Authors: González Agudelo, Julián; Benezra, Andreina; Gomáriz Castro, Spartacus; Garcia, Albert Abstract: This work shows the mathematic calculation for obtention of a Cormoran-AUV hydrodynamic model, it also shows a linar control design for a path tracking. The model has been simplified to three degrees of freedom of movement and the whole system has been simulated using Matlab Simulink Software. The system has been linearizated for different velocities to design a linear control for each one of them. However, all resulting systems can be controlled by a unique linear control due characteristics of the vehicle. The designed control is a PD controller, which avoids the position error since the pole of the vehicle model is at the origin. Different paths have been simulated using this control and their results have been comparated in both rising time as establish time. Fri, 09 Mar 2012 10:56:34 GMT http://hdl.handle.net/2117/15532 2012-03-09T10:56:34Z González Agudelo, Julián; Benezra, Andreina; Gomáriz Castro, Spartacus; Garcia, Albert no This work shows the mathematic calculation for obtention of a Cormoran-AUV hydrodynamic model, it also shows a linar control design for a path tracking. The model has been simplified to three degrees of freedom of movement and the whole system has been simulated using Matlab Simulink Software. The system has been linearizated for different velocities to design a linear control for each one of them. However, all resulting systems can be controlled by a unique linear control due characteristics of the vehicle. The designed control is a PD controller, which avoids the position error since the pole of the vehicle model is at the origin. Different paths have been simulated using this control and their results have been comparated in both rising time as establish time. http://hdl.handle.net/2117/14770 Title: Control en modo deslizante para un convertidor reductor multifase en entrelazado con ecualización de corriente Authors: Ramos Lara, Rafael Ramón; Biel Solé, Domingo; Fossas Colet, Enric Abstract: La presente comunicación aplica la técnica de control en modo de deslizamiento para la obtención de robustez frente a variaciones de la tensión de entrada, de la carga y de la tensión de referencia en un convertidor reductor multifase. Con el objetivo de garantizar una correcta distribución de potencia entre las diversas fases se modifican adecuadamente las superficies de conmutación para lograr una ecualización de corrientes. De este modo el control propuesto permite regular la tensión de salida, lograr una correcta ecualización de corrientes y minimizar el rizado de corriente en el nodo de conexión de la carga. El diseño se valida mediante resultados de simulación. Tue, 24 Jan 2012 11:49:43 GMT http://hdl.handle.net/2117/14770 2012-01-24T11:49:43Z Ramos Lara, Rafael Ramón; Biel Solé, Domingo; Fossas Colet, Enric no La presente comunicación aplica la técnica de control en modo de deslizamiento para la obtención de robustez frente a variaciones de la tensión de entrada, de la carga y de la tensión de referencia en un convertidor reductor multifase. Con el objetivo de garantizar una correcta distribución de potencia entre las diversas fases se modifican adecuadamente las superficies de conmutación para lograr una ecualización de corrientes. De este modo el control propuesto permite regular la tensión de salida, lograr una correcta ecualización de corrientes y minimizar el rizado de corriente en el nodo de conexión de la carga. El diseño se valida mediante resultados de simulación.