Now showing items 21-40 of 168

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      An integer programming model for obtaining cyclic quasi-difference matrices 

      Martínez Fernández, Luis ORCID; Merino Maestre, María ORCID; Montoya, Juan Manuel (Elsevier, 2023)
      Orthogonal arrays are of great importance in mathematical sciences. This paper analyses a certain practical advantage of quasi-difference matrices over difference matrices to obtain orthogonal arrays with given parameters. ...
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      An isoperimetric-type inequality for electrostatic shell interactions for Dirac operators 

      Arrizabalaga, Naiara; Mas, Albert; Vega González, Luis ORCID (Springer Nature, 2015-10-17)
      Abstract: In this article we investigate spectral properties of the coupling H +Vλ, where H = −iα ·∇ +mβ is the free Dirac operator in R3 , m > 0 and Vλ is an electrostatic shell potential (which depends on a parameter ...
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      An Uncertainty Principle for Solutions of the Schrödinger Equation on H-Type Groups 

      Fernández Bertolin, Aingeru ORCID; Jaming, Philippe; Pérez-Esteva, Salvador (Cambridge University Press, 2020-04-02)
      In this paper we consider uncertainty principles for solutions of certain partial differential equations on H -type groups. We first prove that, on H -type groups, the heat kernel is an average of Gaussians in the central ...
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      Analysis of an optimal policy in dynamic bipartite matching models 

      Cadas, Arnaud; Doncel Vicente, Josu ORCID; Bušić, Ana (Elsevier, 2022-04)
      [EN] A dynamic bipartite matching model is given by a bipartite matching graph which determines the possible matchings between the various types of supply and demand items. Both supply and demand items arrive to the system ...
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      Analysis of the Refined Mean-Field Approximation for the 802.11 Protocol Model 

      Ispizua, Begoña; Doncel Vicente, Josu ORCID (MDPI, 2022-11-12)
      Mean-field approximation is a method to investigate the behavior of stochastic models formed by a large number of interacting objects. A new approximation was recently established, i.e., the refined mean-field approximation, ...
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      Approximate zero-crossing: a new interpretable, highly discriminative and low-complexity feature for EEG and iEEG seizure detection. 

      Zanetti, Renato; Pale, Una; Teijeiro Campo, Tomás; Atienza Alonso, David (IOP, 2022)
      Objective. Long-term monitoring of people with epilepsy based on electroencephalography (EEG) and intracranial EEG (iEEG) has the potential to deliver key clinical information for personalised epilepsy treatment. More ...
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      Assessment of Biomass Energy Potential and Forest Carbon Stocks in Biscay (Spain) 

      Mateos Sánchez, Esperanza ORCID; Garrido Uriarte, Florencio; Ormaetxea Butrón, Leyre (MDPI, 2016-03)
      The aim of this research is to identify, quantify and characterize the potential available forest biomass of Pinus radiata D. Don and Eucalyptus globulus Labill. across Biscay province in northern Spain. In order to do ...
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      Associative Conditioning Is a Robust Systemic Behavior in Unicellular Organisms: An Interspecies Comparison 

      Carrasco-Pujante, Jose; Bringas Roldán, Carlos; Malaina Celada, Iker ORCID; Fedetz, Maria; Martínez Fernández, Luis ORCID; Pérez-Yarza Pérez-Irezabal, Gorka ORCID; Boyano López, María Dolores ORCID; Berdieva, Mariia; Goodkov, Andrew; López, José I.; Knafo Farhi, Dina Shira; Martínez de la Fuente Martínez, Ildefonso Abel (Frontiers Media, 2021-07-19)
      The capacity to learn new efficient systemic behavior is a fundamental issue of contemporary biology. We have recently observed, in a preliminary analysis, the emergence of conditioned behavior in some individual amoebae ...
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      Autofluorescence Image Reconstruction and Virtual Staining for In-Vivo Optical Biopsying 

      Picón Ruiz, Artzai ORCID; Medela Ayarzaguena, Alfonso; Sánchez Peralta, Luisa F.; Cicchi, Riccardo; Bilbao, Roberto; Alfieri, Domenico; Elola Artano, Andoni; Glover, Ben; López Saratxaga, Cristina (IEEE-Institute of Electrical and Electronics Engineers, 2021-02-22)
      Modern photonic technologies are emerging, allowing the acquisition of in-vivo endoscopic tissue imaging at a microscopic scale, with characteristics comparable to traditional histological slides, and with a label-free ...
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      Automatic Analysis of Archimedes’ Spiral for Characterization of Genetic Essential Tremor Based on Shannon’s Entropy and Fractal Dimension 

      López de Ipiña Peña, Miren Karmele; Solé Casals, Jordi; Faúndez-Zanuy, Marcos; Calvo, Pilar M.; Sesa, Enric; Roure, Josep; Martínez de Lizarduy Sturtze, Unai; Beitia Bengoa, Blanca; Fernández Gómez de Segura, Elsa; Iradi Arteaga, Jon; García Melero, Joseba; Bergareche, Alberto (MDPI, 2018-07)
      Among neural disorders related to movement, essential tremor has the highest prevalence; in fact, it is twenty times more common than Parkinson's disease. The drawing of the Archimedes' spiral is the gold standard test to ...
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      Automorphisms of rooted trees. 

      Di Domenico, Elena (2022-03-24)
      Groups acting on p-adic trees have been well studied over the past decades since they represent a source of examples with interesting properties in group theory. Groups with intermediate growth or counterexamples to the ...
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      Bearing Assessment Tool for Longitudinal Bridge Performance 

      García Sánchez, David; Fernández Navamuel del Olmo, Ana ORCID; Zamora Sánchez, Diego; Alvear, Daniel; Pardo Zubiaur, David ORCID (Springer, 2020-11)
      This work provides an unsupervised learning approach based on a single-valued performance indicator to monitor the global behavior of critical components in a viaduct, such as bearings. We propose an outlier detection ...
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      Binormal Motion of Curves with Constant Torsion in 3-Spaces 

      Arroyo Olea, Yosu ORCID; Garay Bengoechea, Oscar Jesús; Pámpano Llarena, Álvaro ORCID (Hindawi, 2017)
      We study curve motion by the binormal flow with curvature and torsion depending velocity and sweeping out immersed surfaces. Using the Gauss-Codazzi equations, we obtain filaments evolving with constant torsion which arise ...
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      CALE: Learning by Example in Mathematics with Applets in Mathematical Computational Packages 

      Martínez Fernández, Luis ORCID; Gutiérrez García, Francisco Javier; Legarreta Solaguren, Leire; Malaina Celada, Iker ORCID; Mardones Pérez, Iraide ORCID (MDPI, 2018-10-28)
      In this work we present a methodology of “learning by example” assisted by computers in the study of mathematics. We propose the use of mathematical computational packages to program applets aimed to solve mathematical ...
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      Cell Motility and Cancer 

      Martínez de la Fuente Martínez, Ildefonso Abel; López, José I. (MDPI, 2020-08-05)
      Cell migration is an essential systemic behavior, tightly regulated, of all living cells endowed with directional motility that is involved in the major developmental stages of all complex organisms such as morphogenesis, ...
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      Changes in health-related quality of life as a marker in the prognosis in COPD patients 

      Esteban, Cristóbal; Arostegui Madariaga, Inmaculada ORCID; Aramburu, Amaia; Moraza, Javier; Aburto, Myriam; Aizpiri, Susana; Chasco, Leyre; Quintana López, José María (European Respiratory Society, 2022-01)
      [EN] Chronic obstructive pulmonary disease (COPD) is understood as a complex, heterogeneous and multisystem airway obstructive disease. The association of deterioration in health-related quality of life (HRQoL) with mortality ...
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      Changes in the simulation of atmospheric instability over the Iberian Peninsula due to the use of 3DVAR data assimilation 

      González Rojí, Santos José; Carreno Madinabeitia, Sheila; Sáenz Aguirre, Jon ORCID; Ibarra Berastegi, Gabriel (Copernicus Publications, 2021-06-18)
      [EN] Abstract. The ability of two downscaling experiments to correctly simulate thermodynamic conditions over the Iberian Peninsula (IP) is compared in this paper. To do so, three parameters used to evaluate the unstable ...
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      Characterising the rankings produced by combinatorial optimisation problems and finding their intersections. 

      Hernando Rodríguez, Leticia ORCID; Mendiburu Alberro, Alexander; Lozano Alonso, José Antonio (Association for Computing Machinery, 2019-07)
      [EN] The aim of this paper is to introduce the concept of intersection between combinatorial optimisation problems. We take into account that most algorithms, in their machinery, do not consider the exact objective function ...
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      Characterizing Permutation-Based Combinatorial Optimization Problems in Fourier Space 

      Elorza Deias, Anne; Hernando Rodríguez, Leticia ORCID; Lozano Alonso, José Antonio (MIT Press, 2023-09-01)
      [EN]Comparing combinatorial optimization problems is a difficult task. They are defined using different criteria and terms: weights, flows, distances, etc. In spite of this apparent discrepancy, on many occasions, they ...
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      Children’s Drawing of Plant Life in the Time of COVID-19: An Analysis of the Changes Related to Content and Colour over a Two-Year Period 

      Zaballa Pereiro, Ilargi; Merino Maestre, María ORCID; Villarroel Villamor, José Domingo (MDPI, 2022)
      [EN] This study analyses the depictions that a sample of young children completed to express their knowledge of plant life at two different times, two years apart. The pictorial content is examined by the complexity of the ...