Model of a moored power cable at obsea platform

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Model of a moored power cable at OBSEA platform

New green energy sources deployed at sea in mobile platforms use power cables in order to transport generated 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.Postprint (published version

Simulations of a moored power cable at OBSEA platform

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.Postprint (published version

Preliminary study of moored power cables

New green energy sources deployed at sea in mobile platforms use power cables in order to transport generated 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. Preliminary simulations of the static and dynamic behaviour of a power cable moored at small depth are done. The study is focused on a static study of cables about 0.1 m diameter in a catenary mooring under different seabed conditions, bending stiffness and cable length. A preliminary dynamic study is also done: the trajectory, tensions and deformation or curvature of such a power cable under a specific periodic wave conditions characteristics of catalan coast, in Mediterraneum, are shown. The static study gives useful information to be used when a dynamic mooring is build. The simulations are done under OrcaFlex software (license N1594).Peer ReviewedPostprint (published version

Design of the obstacle detection system with the SONAR MK3 on Guanay II AUV

Autonomous underwater vehicles (AUV) perform inspection missions and intervention in known and unknown environments, where it is necessary to ensure their safety. The AUV must have the ability to detect and avoid obstacles in the path of navigation. This article, an obstacle detection system for experimental Guanay II AUV is proposed, using a mechanical scanning SONAR Tritech Micron MK3. Since Guanay II operates autonomously, we have designed software that allows adjustment and control of the parameters of SONAR, and the acquisition and processing of the signals obtained. Experimental tests at sea have allowed to verify the correct operation of software designed, as well as, experimental tests in a controlled environment have allowed to determine the optimal values of the basic parameters of SONAR.Postprint (published version

Validation of a Orcaflex OBSEA's platform model

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Auditio; Revista Electrónica de Audiología

oai:ojs2.auditio.com:article/3Scientific journals have been the communication vehicle of science since the 17th century. They have served to organize knowledge in areas of common interest and to establish a level in the quality of publications. However, at the same time they have segmented the research in a multitude of journals and made access to them more expensive. For example, a topic of study such as multiple sclerosis can be found referenced in more than 50 different journals. This, for the professional, means an investment in time and cost in the acquisition of the articles, often daunting. Subscriptions have risen 207% during the period between 1986 and 1999. Also, in that same period there has been a 55% increase in the number of the magazine. This has led publishers to unjustified price inflation in most cases. Thus, for example, the annual subscription in Brain Research costs approximately $15,000. The development of journals in electronic format has been dizzying. The advantages are obvious, the reduction in production and distribution costs, the possibility of interaction between the reader and the author, the wide range of presentation and design that allow rapid dissemination of scientific information. Most of the traditional scientific publications now offer their electronic version on the net. Some have even disappeared in their traditional format and are now only available electronically. There is no doubt that we are witnessing a revolution in scientific publishing in which the next 5 years will be decisive. In Europe there are five English-language journals dedicated to audiology: Audiology, Neuro Otology and Audiology, British Audiology, Journal of Audiological Medicine and Scandinavian Audiology. The people responsible for these journals realize that maintaining a high academic standard while reducing costs requires considering the possibility of merging the publications. In recent months we are aware that there have been attempts by Scandi-navian Audiology, Audiology and British Audiology to try to form a single publication. In Spanish, audiology journals are scarce and irregular in appearance. In general, the articles are of low academic level, reflecting the little tradition that this discipline as such has in the field of our Spanish-speaking community. The portal that we present contains, as it could not be otherwise, a fundamental part dedicated to an electronic magazine in Spanish. From this perspective, Auditio was born, a publication dedicated to Audiology in electronic format. Our journal assumes an internationally important role as it deals with an extraordinarily broad and complex discipline. To tell the truth, Audiology could very well follow the “Cervantine” definition of knight-errantry from Don Quixote: “a science that comprehends in itself all or most of the sciences in the world”. Indeed, the audiologist must know anatomy to recognize the different structures that make up the auditory system, he must be a physiologist because he must be familiar with the intimate mechanisms of hearing. You must have knowledge of physics, especially acoustics because you have to understand the triggering stimuli. He must be a psychologist to help his patients in their rehabilitation. You have to know the different diagnostic methods because you have to establish the nature of the different audiological dysfunctions ... in short, judge yourself  "yes it is a contemptible science which the knight who studies and professes it has to learn ". Our purpose is for this electronic journal to achieve the objectives that printed journals on audiology written in Spanish have not been able to achieve so far: (1) universal distribution (2) low costs (3) regular appearance and (4) acceptable scientific level. There is no doubt that for these objectives to be achieved we need the collaboration of all. Above all, that we lose our suspicion and send our most relevant contributions to these journals that now appear in our network. That they submit with pleasure to the international reviewers of the editorial board and above all that they feel scientifically recognized in our journal. On your own behalf and on behalf of the editorial committee, we thank you for your collaboration and we warmly welcome you to the Electronic Journal of Audioiology: Auditio.Las revistas científicas han sido el vehículo de comunicación de la ciencia desde el siglo XVII. Han servido para organizar el conocimiento en áreas de interés común y para el establecimiento de un nivel en la calidad de las publicaciones. Sin embargo y al mismo tiempo han segmentado la investigación en multitud de revistas y encarecido el acceso a las mismas. Por ejemplo, un tema de estudio como la esclerosis múltiple, puede encontrarse referenciada en más de 50 revistas distintas. Esto, para el profesional, significa una inversión en tiempo y coste en la adquisición de los artículos muchas veces desalentadoras. Las suscripciones han subido un 207$15000.  El desarrollo de las revistas en formato electrónico ha sido vertiginoso. Las ventajas son obvias, la reducción de los costes de producción y de distribución, la posibilidad de interaccionar entre el lector y el autor, la amplia gama de presentación y diseño que permiten rapidez para difundir la información científica. La mayoría de las publicaciones científicas tradicionales ofrecen hoy en la red su versión electrónica. Algunas incluso han llegado a desaparecer en su formato tradicional y hoy solo están disponibles electrónicamente. No cabe duda que estamos asistiendo a una revolución en la publicación científica en la que los próximos 5 años serán decisivos. En Europa existen en lengua inglesa cinco revistas dedicadas a la audiología: Audiology, Neuro Otology and Audiology, British Audiology, Journal of Audiological Medicine y Scandinavian Audiology. Las personas responsables de estas revistas se dan cuentan que mantener un alto nivel académico a la vez que reducir los costes exige plantearse la posibilidad de fusionar las publicaciones. En estos últimos meses nos consta que ha habido intentos por Scandinavian Audiology, Audiology y British Audiology de tratar de formar una sola publicación. En español, las revistas de audiología son escasas y de aparición irregular. En general los artículos son de bajo nivel académico reflejando la poca tradición que tienen este disciplina como tal en el ámbito de nuestra comunidad hispano parlante. El portal que nosotros presentamos contiene, como no podía ser de otro manera, una parte fundamental dedicada a una revista electrónica en lengua española. Bajo esta perspectiva nace Auditio, publicación dedicada a la Audiología en formato electrónico. Nuestra revista asume un papel internacionalmente importante toda vez que trata con una disciplina extraordinariamente amplia y compleja. A decir verdad, la Audiología podría seguir muy bien la definición cervantina de la caballería andante: “ una ciencia que encierra en sí todas o las más ciencias del mundo”. Efectivamente, el audiólogo debe saber anatomía para reconocer las distintas estructuras que constituyen el sistema auditivo, ha de ser fisiólogo porqué debe estar familiarizado con los mecanismos íntimos de la audición. Debe tener conocimientos de física, especialmente de acústica porqué tiene que entender los estímulos desencadenantes de la audición. Debe ser psicólogo para ayudar a sus pacientes en su rehabilitación. Tiene que conocer los distintos métodos de diagnóstico pues debe establecer la naturaleza de las distintas disfunciones audiológicas... en suma, juzguen usted “ sí es ciencia mocosa lo que aprende el audiólogo que la estudia y profesa”. Nuestro propósito es que esta revista electrónica consiga los objetivos que las revistas impresas sobre audiología escritas en español no han podido conseguir hasta el momento: (1) distribución universal (2) bajos costes (3) aparición regular y (4) nivel científico aceptable. Que duda cabe que para que estos objetivos se puedan conseguir necesitamos la colaboración de todos. Sobre todo que perdamos la suspicacia y enviemos nuestras contribuciones más relevantes a estas revistas que ahora surgen en nuestra red. Que se sometan con gusto a los revisores internacionales del consejo editorial y sobre todo que se sientan reconocidos científicamente en nuestra revista. En nombre propio y del comité editorial le agradecemos su colaboración y le damos la más calurosa bienvenida a la Revista electrónica de Audiología: Auditio

Preliminary study of moored power cables

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