ADDI
Not a member yet
47763 research outputs found
Sort by
Model Predictive Flux Weakening Controller for Asymmetrical Dual Three-Phase PMSM Drives
Get PDFAsymmetrical dual three-phase permanent magnet synchronous machines (DTP-PMSMs) are well-known alternatives for high-performance electromobility applications. Flux weakening (FW) operation is crucial when a wide speed range is needed. This work proposes a novel FW continuous control set model predictive controller (FW-MPC) as an alternative to conventional FW approaches. From an MPC formulation, the optimal voltages for a given reference torque are obtained as the solution of a quadratic programming (QP) problem based on a quadratic cost function subject to linear constraints. Simulation
results are provided, assessing the performance of the proposed FW controller under the Worldwide Harmonised Light vehicles Test Cycle (WLTC).This work was supported by the Government of the Basque Country within the fund for research groups of the Basque University system IT1440-22 and by the ELKARTEK CIPEME project KK-2024/00053
Assembling agencies on a website: interactions among language, sports and knowledge
Get PDFIn this article we reflect on the process used to create the website euskarakirolkide. eus, which emerged from an ethnographic study involving youth sports in the Basque Autonomous Community. The website documents some of the strategies used by sports clubs to promote the use of the Basque language not only within the clubs but also in the wider context of neighborhood and city, illustrating how the clubs serve as language agents by giving voice, body and materiality to their prac- tices. The euskarakirolkide.eus website also details and exhibits the careful research process undertaken and the complex interplay between the material and relational elements involved. We argue that the website’s dual function—a showcase for the sociolinguistic work done by the clubs and a vehicle for the generation of knowl- edge—transforms it into a methodological-epistemological tool that has agency. Euskarakirolkide.eus shows the linguistic work done by the clubs, respecting their ways of understanding and managing the languages, while also proposing a partici- patory ethnography model that is attuned to the needs of the context in which it is applied. In this sense, the webpage emerges as an assemblage, that is, a power and agency which seeks, through doing-together, to promote a sociolinguistics that is concerned with the survival of a minoritized language like Basque.EquiLing-Basque subproject (PID2019-105676RB-C42/ AEI/10.13039/501100011033), funded by the Spanish Ministry of Science and Innovation
Spout diameter in fine particle conical spouted beds: Assessing the influence of draft tubes by PTV
Get PDFThe spout diameter is an essential parameter for designing spouted bed contactors, as it conditions the gas–solid contact and heat and mass transfer rates. Several correlations have been proposed in the literature to estimate the spout size, but they do not provide accurate results in beds made up of fine particles, especially when they are equipped with open-sided draft tubes. Accordingly, the spout–annulus interface has been determined by means of Particle Tracking Velocimetry (PTV) and the spout shape has been delineated under different operating conditions in fountain confined conical spouted beds of varying geometric parameters. The air inlet diameter and gas velocity, as well as the aperture ratio of the open-sided draft tubes, are the parameters of greatest influence. Accordingly, a new correlation has been proposed, which allows predicting accurately the spout size in beds without draft tube, as well as those equipped with open-sided ones.This work has received funding from the grant PID2022-139454OB- I00 funded by MCIN/AEI/10.13039/501100011033 and the grants IT1645 − 22 and KK − 2023/00060 funded by the Basque Government, Spain. Maider Bolaños thanks the University of the Basque Country UPV/EHU for her Ph.D. grant (PIF21/69)
Lipotoxicity-driven metabolic dysfunction-associated steatotic liver disease (MASLD)
Get PDFMetabolic dysfunction-associated steatotic liver disease (MASLD) encompasses a spectrum of liver lesions, ranging from simple steatosis to metabolic dysfunction-associated steatohepatitis (MASH), that may further progress to cirrhosis. MASLD is estimated to affect more than one third of the general population and it represents a risk factor for end-stage liver failure and liver cancer, substantially contributing to liver-related morbidity and mortality. Although the pathogenesis of MASLD is incompletely understood, it is known to consist of a multifactorial process influenced by extrinsic and intrinsic factors such as metabolic, environmental and demographic features, gut microbiota and genetics. Dysregulation of both extracellular and intracellular lipid composition is known to promote the generation of toxic lipid species, thereby triggering lipotoxicity and cellular stress. These events ultimately lead to the activation of distinct cell death pathways, resulting in inflammation, fibrogenesis and, eventually, carcinogenesis. In this manuscript, we provide a comprehensive review of the role of lipotoxicity during MASLD pathogenesis, discussing the most relevant lipid species and related molecular mechanisms, summarizing the cell type-specific effects and highlighting the most promising putative therapeutic strategies for modulating lipotoxicity and lipid metabolism in MASLD.Spanish Carlos III Health Institute (ISCIII) [JMB (FIS PI18/01075, PI21/00922 and Miguel Servet CPII19/00008); MJP (FIS PI20/00186, PI23/01565); PMR (FIS PI23/01850 and Miguel Servet CP22/00073); JMB and PA (PMP21/00080)] cofinanced by “Fondo Europeo de Desarrollo Regional” (FEDER); CIBERehd (ISCIII): JMB, PMR, MJP, PA and LB, Spain; “Diputación Foral Gipuzkoa” (2023-CIEN-000008-01 to PMR and 2023-CIEN-000045-04-01 to MJP), Spain; Department of Health of the Basque Country (2023111017 to MJP and PA, 2020111077 and 2021111021 to JMB and PA; 2022111070 to PMR); La Caixa Scientific Foundation (JMB and REC: HR17-00601), Spain; “Fundación Científica de la Asociación Española Contra el Cáncer” (AECC Scientific Foundation: “Lab AECC 2023” AECC23/502 to PMR; AECC Postdoctoral grant POSTD246369IZQU to LI-S), Spain; Asociación Española para el Estudio del Hígado (AEEH, Juan Rodes Postdoctoral grant to LI-S); AMMF-The Cholangiocarcinoma Charity (EU/2019/AMMFt/001, to JMB and PMR), United Kingdom; PSC Partners US (to JMB and AL) and PSC Supports UK (to JMB and PMR). SI-R and LI-S received funds from the Department of Education of the Basque Country (PRE_2023_1_0021 and POS_2022_1_0041, respectively). MCIN/AEI/10.13039/501100011033 (PID2021- 124425OB-I00 to PA) co-financed by the European Regional Development Fund (ERDF); and Grupos consolidados Gobierno Vasco IT1476-22 to PA; MA was founded by Pontificia Universidad Católica de Chile (PBV2302); and Chilean Government through Fondo Nacional de Desarrollo Científico y Tecnológico (Fondecyt Project, 1241450 to MA); CM was financed by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Brasil (CAPES) – Finance Code 001
Economía del cambio climático y el impuesto al carbono como medida de mitigación
Get PDFEl cambio climático es uno de los mayores retos globales de la actualidad, con profundas implicaciones económicas, sociales y ambientales. Ante el calentamiento global, considerado el gran fallo de mercado de nuestra era, el impuesto al carbono emerge como una herramienta clave de mitigación. Al corregir las externalidades negativas, internalizar los costes sociales de la contaminación y establecer un precio sobre las emisiones, este mecanismo incentiva la adopción de tecnologías limpias y fomenta la transición verde. El presente trabajo aborda el contexto económico del cambio climático, las políticas internacionales y europeas, y el diseño, implementación y efectividad del impuesto al carbono. A través de este análisis, se ofrece una visión crítica sobre los desafíos y oportunidades de la medida, contribuyendo al debate global sobre la transición hacia una economía baja en carbono y al diseño de políticas públicas más eficaces y sostenibles
Impact of Steam-Exploded Feather Incorporation on the Biodegradation Performance of Renewable Biocomposites
Get PDFThe increasing environmental concerns regarding plastic waste, especially in
agriculture, have driven the search for sustainable alternatives. Agricultural plastics, such
as mulching films and greenhouse covers, are heavily reliant on petrochemical-derived
materials, which persist in the environment and contribute to long-term pollution. This
study explores the use of biodegradable biocomposites made from steam explosion-treated
chicken feathers and various polymer matrices to address these issues. Chicken feathers, a
waste by-product of the poultry industry, present an excellent biodegradability as a result
of the steam explosion treatment and contain nitrogen, potentially enhancing soil fertility.
The biocomposites were characterized by thermal stability, mechanical properties, and
biodegradability, and ecotoxicity assessments were carried out studying the incorporation
of feathers into the soil. Results showed that the incorporation of treated chicken feathers
increased the water absorption capacity of the composites, promoting faster disintegration
and biodegradation. In particular, biocomposites made with polyhydroxyalkanoates and
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) exhibited a significant increase in degradation
rates, from 3–10% in the first month for pure matrices to 40–50% when reinforced
with treated feathers. Meanwhile, those made from polylactic acid showed slower degradation.
Furthermore, the addition of feathers positively influenced crop growth at low
concentrations, acting as a slow-release fertilizer. However, high concentrations of feathers
negatively affect plant growth due to excess nitrogen. These findings highlight the potential
of poultry feathers as a valuable, sustainable filler for agricultural bioplastics, contributing
to waste valorization and environmentally friendly farming practices.This project has received funding from the Bio-based Industries Joint Undertaking under
the European Union’s Horizon 2020 research and innovation programme under grant agreement
No. 101023306. The JU receives support from the European Union’s Horizon 2020 research and
innovation programme and the Bio-based Industries Consortium
The brain bauplan sheds light on evo-devo constraints
No full text329 p.Patterning and segmentation networks establish the brain bauplan during mid-embryogenesis, known as the phylotypic period. Up to now, sparse evidence of regional master genes has suggested their conservation across vertebrates, but transcriptomic-level analysis has been lacking. To address this gap and evaluate the conservation of cell types in the early (phylotypic) brain, we analyzed scRNA-seq and in situ hybridization data from the early developing brains of five key vertebrate species: mouse (La Manno et al, 2021), chick, gecko, zebrafish (Raj et al, 2020), and human (Braun et al, 2023). Our single-cell atlases identified equivalent morphogenic organizers and regionally specialized neural stem cell types across these vertebrates. Additionally, snATAC-seq data from mouse and chick brains revealed a high conservation of transcription factors in contrast to the divergence of downstream effector genes and cis-regulatory elements. Moreover, our findings reveal how pleiotropy and associated lethality impose evolutionary constraints that lead to brain bauplan conservation. Not only on brain development but also on the broader organogenic embryo, which follows equivalent patterning processes. All in all, this PhD thesis underscore the high conservation of the essential foundations for brain development, the brain bauplan, and its tight relationship with phylotypic period constraint and the cell identity networks that act as the Rossetta stone for homolog
Futboleko jarduerak moldatzearen ondorioak emakumezko jokalari gazteen dimentsio taktiko, fisiko eta emozionalean: baloi kopurua
Get PDF40 p. -- Bibliogr.: p. 22-40Ikerketa honen helburua futboleko jardueretan baloi kopuruaren erabilpenaren ondorioak
emakumezko jokalari gazteen erantzun fisiko, taktiko eta pertzeptiboan ikertzea izan zen.
Hamalau urte baino gutxiagoko hamalau jokalarik (entrenatuak/garatutakoak) 3 x 6 minutuko
hiru partida (8 vs 8) jokatu zituzten: i) baloi bat erabilita (B1); ii) bi baloi erabilita (B2); eta iii)
hiru baloi erabilita (3B). GPS -ak neurtutako jokalarien posizio-datu bidez, erantzun taktiko
(Azalera [AA] eta luzaketa indizea [LI]) eta fisiko (distantzia totala [DT], oinez egindako
distantzia [O]; trostan egindako distantzia [T]; iv) lasterka egindako distantzia [L]; eta abiadura
handian egindako lasterkaldietako distantzia [AHL]) ebaluatu ziren. Erantzun pertzeptiboa
aztertzeko, BECS gozamen (GO) eta gaitasun (GA) eskala erabili zen. Baloi kantitatea
handitzean, LI eta AA baloreak B1 baino esanguratsuki handiagoak (< .001) (efektuaren tamaina
txikia - handia) izan ziren. Baloi bat baino gehiago erabili zenean, jokalariek kanpo karga
handiagoa izan zuten, batez ere, bi baloi erabiltzean: ezberdintasunak esanguratsuak (p < .05)
izan ziren DT, O, T eta AHL tarteetan. Erantzun pertzeptiboari dagokionez, GA -ean ez ziren
ezberdintasun esanguratsurik aurkitu (p = .865) atazen artean. GO -ean aldiz, baloi kopurua
handitu heinean gozamenaren pertzepzioa baxuagoa izan zen (p = 0.008). Baloi bat baino
gehiago erabiltzeak jokalariek zelai gehiago hartu eta kanpo karga handitzea eragiten du. Baloi
kopurua handitzeak ez du GA -n eraginik, GO -ean ordea, bai, balioak baxuagoak izanik
Navigation in challenging environments
No full text[EN] Autonomous navigation under degraded visibility remains a critical challenge for systems relying on conventional sensing. This work introduces a simulation-based proof of concept, motivated by a review of navigation strategies in adverse environments, where thermal cameras emerge as a strong alternative. Using Gazebo Fortress and ROS 2, a complete testbed was developed integrating a stereo thermal–inertial SLAM pipeline on a Panther UGV operating in fog. Thermal perception was compared with stereo-RGB and RGB-D baselines. While conventional configurations deteriorated significantly under fog, thermal sensing delivered maps of higher fidelity and stable localisation, demonstrating its potential for robust real-world navigation.[ES] La navegación autónoma en condiciones de visibilidad degradada sigue siendo un desafío crítico para los sistemas basados en percepción convencional. Este trabajo presenta una prueba de concepto en simulación, motivada por una revisión de estrategias de navegación en entornos adversos, donde las cámaras térmicas surgen como una alternativa prometedora. Se desarrolló un banco de pruebas en Gazebo Fortress y ROS 2, integrando un pipeline de SLAM térmico–inercial estéreo en un UGV Panther operando en niebla. La percepción térmica se comparó con configuraciones estéreo-RGB y RGB-D. Mientras las configuraciones convencionales se degradaron notablemente, la térmica produjo mapas más fiables y localización estable.[EU] Ikusgarritasun murriztuan nabigazio autonomoa erronka kritikoa da sentsore konbentzionaletan oinarritzen diren sistemetarako. Lan honek simulazio bidezko kontzeptu-proba aurkezten du, ingurune kaltegarrietako nabigazio-estrategien berrikuspen baten bidez motibatua, non kamera termikoak aukera erakargarri gisa agertzen diren. Gazebo Fortress eta ROS 2 erabiliz, probetarako banku oso bat garatu da, UGV Panther batean SLAM termiko–inertzial estereoa integratuz, laino-baldintzetan. Perzepzio termikoa stereo-RGB eta RGB-D konfigurazioekin alderatu da. Konfigurazio konbentzionalek lainoan nabarmen egiten dute okerrera, baina termikoak fidagarritasun handiagoko mapak eta lokalizazio egonkorra eskaintzen ditu, mundu errealeko nabigazio sendo baterako potentziala erakutsi
Estudio del gasto energético de una plataforma inteligente autónoma
No full text80 p. – Bibliogr.: p. 68-69[ES] Se ha realizado la optimización energética de una plataforma inteligente autónoma mediante el uso de el algoritmo DWA colaborando con un entorno más sostenibl