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  Hopf Galois structures on symmetric and alternating extensions 

  Río Doval, Ana; Vela del Olmo, Mª Montserrat; Crespo Vicente, Teresa (2018)
  Article
  Accés obert

  By using a recent theorem by Koch, Kohl, Truman and Underwood on normality, we determine that some types of Hopf Galois structures do not occur on Galois extensions with Galois group isomorphic to alternating or symmetric ...
• On graphs with the same restricted U-polynomial and the U-polynomial for rooted graphs 

  Aliste Prieto, José; Zamora, José; Mier Vinué, Anna de (2018-07)
  Article
  Accés restringit per política de l'editorial

  In this abstract, we construct explicitly, for every k, pairs of non-isomorphic trees with the same restricted U-polynomial; by this we mean that the polynomials agree on terms with degree at most k. The construction is ...
• Simulation study of tandems of perovskite and IBC c-Si solar cells 

  Silvestre Bergés, Santiago; Mas-Marza, Elena; Puigdollers i González, Joaquim; Fabregat Fillet, Jaume; Ortega Villasclaras, Pablo Rafael; Serra, Danielle (WIP Renewable Energies, 2018)
  Text en actes de congrés
  Accés restringit per política de l'editorial

  In this work, the simulation results obtained for a tandem configuration of perovskite, as top cell, and Interdigitated Back-Contacted (IBC) c-Si as bottom cell are presented. Two different models were used for the modelling ...
• The circulation of scientific knowledge in Euler's first stage at Saint Petersburg Academy of Sciences 

  Massa Esteve, Maria Rosa (Associationi Culturale Viaggiatori, 2018-06)
  Capítol de llibre
  Accés restringit per política de l'editorial
• Influence of severe plastic deformation in phase transformation of superduplex stainless steels 

  Llorca Isern, Nuria; Biserova Tahchieva, Alisiya; López Jiménez, Isabel; Calliari, Irene; Cabrera Marrero, José M.; Roca, Antoni (Springer, 2018-10-08)
  Article
  Accés restringit per política de l'editorial

  Duplex and superduplex stainless steels are characterised by high corrosion resistance and high mechanical strength. However, these steels can suffer formation of secondary brittle phases when they reach temperatures between ...
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  Image fusion based on principal component analysis and slicing image transformation 

  Acho Zuppa, Leonardo; Buenestado Caballero, Pablo (EDP Sciences, 2018)
  Text en actes de congrés
  Accés obert

  Image fusion deals with the ability to integrate data from image sensors at different instants when the source information is uncertain. Although there exist many techniques on the subject, in this paper, we develop two ...
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  Wind turbine multi-fault detection and classification based on SCADA data 

  Vidal Seguí, Yolanda; Pozo Montero, Francesc; Tutivén Gálvez, Christian (Multidisciplinary Digital Publishing Institute (MDPI), 2018)
  Article
  Accés obert

  Due to the increasing installation of wind turbines in remote locations, both onshore and offshore, advanced fault detection and classification strategies have become crucial to accomplish the required levels of reliability ...
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  Detection and description of the different ionospheric disturbances that appeared during the solar eclipse of 21 August 2017 

  Yang, Heng; Monte Moreno, Enrique; Hernández Pajares, Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2018-10-30)
  Article
  Accés obert

  This work will provide a detailed characterization of the travelling ionospheric disturbances (TIDs) created by the solar eclipse of 21 August 2017, the shadow of which crossed the United States from the Pacific to the ...
• Adaptive finite-time stabilization of chaotic flow with a single unstable node using a nonlinear function-based global sliding mode 

  Mobayen, Saleh; Ma, Jun; Pujol Vázquez, Gisela; Acho Zuppa, Leonardo; Zhu, Quanmin (2018)
  Article
  Accés restringit per política de l'editorial

  This article presents a novel adaptive finite-time stabilization technique based on global sliding mode for disturbed chaotic flow with a single unstable node. The considered chaotic flow has unusual characteristics ...
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  Cosmological perturbations in a class of fully covariant modified theories: application to models with the same background as standard LQC 

  Haro Cases, Jaume; Aresté Saló, Llibert; Elizalde, Emilio (Springer, 2018-09-01)
  Article
  Accés obert

  Bouncing cosmologies are obtained by adding to the Einstein–Hilbert action a term of the form -g---vf(¿), with ¿ a scalar depending on the Hubble parameter only, not on its derivatives, and which is here shown to arise ...
• Global instability in the restricted planar elliptic three body problem 

  Delshams Valdés, Amadeu; Kaloshin, Vadim; Rosa Ibarra, Abraham de la (2018-01-01)
  Article
  Accés restringit per política de l'editorial

  The restricted planar elliptic three body problem (RPETBP) describes the motion of a massless particle (a comet or an asteroid) under the gravitational field of two massive bodies (the primaries, say the Sun and Jupiter) ...
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  Safety culture maturity assessment for mining activities in South America 

  Bascompta Massanes, Marc; Sanmiquel Pera, Lluís; Vintró Sanchez, Carla; Rossell Garriga, Josep Maria; Costa, M. (2018-10-09)
  Article
  Accés obert

  BACKGROUND:Health and safety is a crucial issue in the mining industry due to the implication of accidents in the sector. OBJECTIVE:This study determines the safety culture characteristics in several mining activities from ...

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