151 research outputs found
Eider Rodríguez (1977), una escritora vasca «Hasta hace poco no solo no estábamos escribiendo, sino que además, nos estaban escribiendo»
No full textEntrevista a Eider Rodríguez por Miren Gabantxo-Uriagereka[EN] The Basque writer Eider Rodríguez, born in 1977 into a working-class village (Renteria, Gipuzkoa) where the political and social climate of the 1980s and 1990s was marked by the arrival of heroin into the lives of young people trapped between high unemployment rates and the ETA’s armed struggle, emerged as a breath of fresh air amid so much pain. Speaking of difficult issues can be healing, and Eider Rodriguez’s oeuvre reveals an author who writes in order to dig into our wounds and help us think about how to heal them.[ES] La escritora vasca Eider Rodríguez, nacida en 1977 en un pueblo industrial, Renteria (Gipuzkoa), cuyo clima político-social durante la década de los ‘80 y los ‘90 se caracterizó por la irrupción de una droga tan letal como la heroína entre una juventud abocada al paro y/o a la lucha armada con la organización terrorista ETA, emerge como un soplo de lucidez entre tanto dolor. Su mirada es la de alguien con una gran capacidad de observación de la dura realidad del País Vasco y que comprende los porqués del comportamiento humano. Hablar de las cosas resulta sanador y el empeño de esta escritora la convierte en una narradora que escribe para mostrar las heridas y hacernos pensar en cómo curarlas.Grupo Consolidado de Investigación LAIDA (Literatura eta Identitatea) que pertenece a la red de Grupos de Investigación Consolidado del Gobierno Vasco (IT 1397/19) y de la Universidad del País Vasco / Euskal Herriko Unibertsitatea (GIU 20/26)
DESIGN TOOLS FOR OFFSHORE RENEWABLE ENERGY
No full textThe crisis caused by the COVID-19 has awakened the fear of forgetting the fight against Climate Change coming up with a number of initiatives demanding to accelerate the European Green Deal, as the best way out of the crisis. Offshore renewable energy sources, including offshore wind, wave power and tidal streams, might play a crucial role in meeting low-carbon energy scenarios, which is one of the six key principles of the Green Recovery, contributing at the same time to economic growth and job creation. However, continuous cost reduction is needed to achieve more efficient and competitive technologies in comparison to other energy sources. Design tools can help to accelerate cost reduction in early stages of technology development or deployment project planning. This article shows some examples of design tools developed within four European funded R&D projects: • DTOcean and DTOceanPlus provide advanced design tools for ocean energy systems innovation, development and deployment • LIFES50+ proves cost effective technology for floating substructures for 10MW wind turbines at water depths greater than 50 m • OPERA collects, analyses and shares open-sea operating data and experience to validate and de-risk several industrial innovations for wave energy The design tools presented in this article cover different stages of technology or project development: • Multi-physics numerical modelling tools for the design of floating offshore wind turbines • Decision-making tools during the planning phase of offshore wind or ocean energy farms • Structured innovation and stage gate tools for the evaluation of innovations for offshore renewables at early stages of development The reader will be able to find out references to useful open source tools and public documents produced by these projects.Peer reviewe
Correcting the Record: Subspecific Identification of Nebraska’s Lone Common Eider (\u3ci\u3eSomateria mollissima\u3c/i\u3e)
No full textIn late November or early December 1967, Roger Guenther harvested a Common Eider (Somateria mollissima) on Maloney Canal between Maloney and Sutherland in Lincoln County, Nebraska. The head and a single foot from the carcass were deposited at the University of Nebraska State Museum via the University of Nebraska–Lincoln and the Nebraska Fish and Game Department (now the Game and Parks Commission). Dr. Jean Tate prepared the parts, which were inventoried as specimen #ZM-12341 in the UNSM. Dr. Paul Johnsgard purportedly took this specimen to the Field Museum of Natural History in Chicago for identification purposes, and concluded the specimen belonged to the race S.m. sedentaria. These events are summarized in Tate (1969) and the occurrence of this subspecies in Nebraska has been cited numerous times in the literature.
Common Eider has seven recognized subspecies (Baldassarre 2014), four of which are found in North America: Pacific Common Eider (S. m. v-nigrum), Atlantic Common Eider (S. m. dresseri), Northern Common Eider (S. m. borealis), and Hudson Bay Common Eider, (S. m. sedentaria). Given Nebraska’s longitudinal proximity to Hudson Bay, S.m. sedentaria may seem like the logical subspecies to wander into Nebraska.
In August 2022, the lead author, after reviewing photographs of the specimen on the Birds of Nebraska–Online website, communicated in an email that he believed Nebraska’s lone Common Eider record was assigned to the incorrect subspecies. Specifically, he considered that the bill processes, referring to the shape of feathers around the bill, are not consistent with S.m. sendentaria.
. . .
We conclude the Nebraska Common Eider specimen was originally misidentified and is, in fact, S. m. v-nigrum. Our reevaluation of Nebraska’s Common Eider subspecific identification provides an important correction to the state’s ornithological record and to the species’ subspecific historical distributional record
Wave forces on the Eider evacuation sluices
No full textFor a safe and efficient dimensioning of the Eider Evacuation Sluices it was necessary to know the magnitude and probability of the occurring wave forces. To determine those data a model investigation has been carried out in one of the wind flumes of the Delft Hydraulics Laboratory in charge of and in co-operation with the Bundesanstalt fur Wasserbau in Karlsruhe. For this purpose it was necessary to consider all combinations of wave conditions and waterlevels in nature which can lead to important wave forces, taking into account their probability of occurrence. It was on these grounds that the conditions for the model tests were chosen. The results of the model investigation had to be translated into probabilities of exceedance of the wave forces per year. Taking into account the results of the model tests as well as the general knowledge about the distribution of the wave forces, suitable load figures have been determined especially for the dimensioning of the structure. Only this extensive investigation could provide the guarantee of a safe and efficient dimensioning of the structure against the impacts of breaking waves
An Iterative Refining Approach to Design the Control of Wave Energy Converters with Numerical Modeling and Scaled HIL Testing
No full textThe aim of this work is to show that a significant increase in the efficiency of a Wave Energy
Converter (WEC) can be achieved already at an early design stage, through the choice of a turbine
and control regulation, by means of an accurate Wave-to-Wire (W2W) modeling that couples the
hydrodynamic response calibrated in a wave flume to a Hardware-In-the-Loop (HIL) test bench with
sizes and rates not matching those of the system under development. Information on this procedure
is relevant to save time, because the acquisition, the installation, and the setup of a test rig are not
quick and easy. Moreover, power electronics and electric machines to emulate turbines and electric
generators matching the real systems are not low-cost equipment. The use of HIL is important in the
development of WECs also because it allows the carrying out of tests in a controlled environment,
and this is again time- and money-saving if compared to tests done on a real system installed at the
sea. Furthermore, W2W modeling can be applied to several Power Take-OFF (PTO) configurations to
experiment with different control strategies. The method here proposed, concerning a specific HIL for
testing power electronics and control laws for a specific WECs, may have a more general validit
Modelling and control for the oscillating water column
No full textxxii, 219 p.Renewable energies are definitely part of the equation to limit our dependence to fossil fuels. Within this sector, ocean energies, and especially wave energy, represent a huge potential but is still a growing area. And like any new field, it is synonym to a high cost of energy production. Increasing the energy production, while keeping the costs controlled, has the leverage to drop down the cost of energy produced by wave energy converters (WECs). The main objective of this thesis is to make progress on the understanding of the effect of advanced control algorithms in the improvement of the power produced by wave energy devices. For that purpose, several control strategies are designed, compared, and assessed. To support this analysis, numerical models representing the overall energy conversion chain of WECs are developed. The Basque Country in Spain is fortunate enough to host the development and operation of two devices based on the Oscillating Water Column (OWC) principle. One is the Mutriku OWC plant, and the second is the floating buoy Marmok-A from Oceantec/IDOM, both devices were made available for sea trials. Several control algorithms were then implemented to be tested in real environments. Among them was a non-linear predictive control algorithm. Its test in real conditions represent a world first in the area of control for OWC systems, and maybe for the whole WEC sector if comparing with publicly available information. An outstanding results of the thesis is undoubtedly to move forward the predictive control algorithm from TRL3 to TRL6 after successful implementation and operation in both devices under real environmental conditions
Modelling and control for the oscillating water column
No full textxxii, 219 p.Renewable energies are definitely part of the equation to limit our dependence to fossil fuels. Within this sector, ocean energies, and especially wave energy, represent a huge potential but is still a growing area. And like any new field, it is synonym to a high cost of energy production. Increasing the energy production, while keeping the costs controlled, has the leverage to drop down the cost of energy produced by wave energy converters (WECs). The main objective of this thesis is to make progress on the understanding of the effect of advanced control algorithms in the improvement of the power produced by wave energy devices. For that purpose, several control strategies are designed, compared, and assessed. To support this analysis, numerical models representing the overall energy conversion chain of WECs are developed. The Basque Country in Spain is fortunate enough to host the development and operation of two devices based on the Oscillating Water Column (OWC) principle. One is the Mutriku OWC plant, and the second is the floating buoy Marmok-A from Oceantec/IDOM, both devices were made available for sea trials. Several control algorithms were then implemented to be tested in real environments. Among them was a non-linear predictive control algorithm. Its test in real conditions represent a world first in the area of control for OWC systems, and maybe for the whole WEC sector if comparing with publicly available information. An outstanding results of the thesis is undoubtedly to move forward the predictive control algorithm from TRL3 to TRL6 after successful implementation and operation in both devices under real environmental conditions
Advanced Control Strategies for Wind Power Generation with Floating Technology.
No full textEl capítulo 5 está sujeto a confidencialidad por el autor.
116 p.El consenso entre expertos internacionales es claro: las actividades humanas están acelerando el calentamiento global y el cambio climático. Somos muy conscientes de nuestras demandas energéticas, y es evidente que una parte significativa de nuestro consumo proviene de la producción de combustibles fósiles. Mientras las necesidades energéticas de los consumidores sigan aumentando, la producción de energía seguirá desempeñando un papel clave en el calentamiento global.Las fuentes de energía renovable desempeñan innegablemente un papel vital en reducir nuestra dependencia de los combustibles fósiles. En este ámbito, las energías renovables marinas, en particular la energía eólica, se presentan como una gran promesa, pero aún son una fuente de energía en evolución. Si bien estas tecnologías demuestran eficacia en demostraciones unitarias y algunos proyectos de parque piloto con pocas unidades, es imperativo realizar más investigaciones y desarrollos para que las soluciones sean rentables y alcancen una fase comercial a gran escala. Mejorar la producción y gestionar eficazmente los costes es clave para reducir el coste total de la energía generada por sistemas de energía eólica.Nuestro objetivo principal, constante a lo largo de toda la tesis, ha sido la reducción de los costes asociados con el diseño en las etapas tempranas cuando más cambios pueden producirse sobre el concepto del sistema. Al profundizar en los problemas principales, buscamos descubrir estrategias de control innovadoras, aprovechar las distintas tecnologías emergentes para su modelado y control, mejorando la eficiencia de los sistemas. A través de esta exploración multifacética, intentamos fomentar caminos más accesibles y rentables para el diseño en esas primeras etapas de diseño para el siempre cambiante panorama de la producción de energía eólica marina flotante
Advanced Control Strategies for Wind Power Generation with Floating Technology.
No full textEl capítulo 5 está sujeto a confidencialidad por el autor.
116 p.El consenso entre expertos internacionales es claro: las actividades humanas están acelerando el calentamiento global y el cambio climático. Somos muy conscientes de nuestras demandas energéticas, y es evidente que una parte significativa de nuestro consumo proviene de la producción de combustibles fósiles. Mientras las necesidades energéticas de los consumidores sigan aumentando, la producción de energía seguirá desempeñando un papel clave en el calentamiento global.Las fuentes de energía renovable desempeñan innegablemente un papel vital en reducir nuestra dependencia de los combustibles fósiles. En este ámbito, las energías renovables marinas, en particular la energía eólica, se presentan como una gran promesa, pero aún son una fuente de energía en evolución. Si bien estas tecnologías demuestran eficacia en demostraciones unitarias y algunos proyectos de parque piloto con pocas unidades, es imperativo realizar más investigaciones y desarrollos para que las soluciones sean rentables y alcancen una fase comercial a gran escala. Mejorar la producción y gestionar eficazmente los costes es clave para reducir el coste total de la energía generada por sistemas de energía eólica.Nuestro objetivo principal, constante a lo largo de toda la tesis, ha sido la reducción de los costes asociados con el diseño en las etapas tempranas cuando más cambios pueden producirse sobre el concepto del sistema. Al profundizar en los problemas principales, buscamos descubrir estrategias de control innovadoras, aprovechar las distintas tecnologías emergentes para su modelado y control, mejorando la eficiencia de los sistemas. A través de esta exploración multifacética, intentamos fomentar caminos más accesibles y rentables para el diseño en esas primeras etapas de diseño para el siempre cambiante panorama de la producción de energía eólica marina flotante
Mujeres que trabajan: La economía feminista en la narrativa de Eider Rodríguez
No full textThis article analyzes four contemporary short stories written by Basque author Eider Rodríguez that address women’s obstacles and oppressive conditions in the labor market. Using the theories of feminist economists such as Amaia Pérez Orozco, Cristina Carrasco Bengoa, and Lourdes Benería, I analyze how in these narratives women are forced to leave their paid jobs when becoming mothers, being reduced to a maternal and domestic identity, or they try to reconcile their professional and family life, thus suffering physical and mental exhaustion and emotional instability. The short stories also show the poor working conditions that women face, having to work in low-paid jobs and suffering workplace harassment from their bosses. Rodríguez criticizes the lack of participation by husbands in household chores and reveals how neoliberal capitalism is heteropatriarchal by not valuing women’s care work and taking advantage of them in the labor market
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