Now showing items 1-20 of 22

    • Thumbnail

      Advances in Nonlinear Complexity Analysis for Partial Differential Equations 

      Dai, Zhengde; Chang, Qianshun S.; Xu, Lan; Mohyud-Din, Syed Tauseef; Tari, Hafez; Zhu, Peicheng (Hindawi Publishing Corporation, 2013)
      ...
    • Thumbnail

      Assessment of Biomass Energy Potential and Forest Carbon Stocks in Biscay (Spain) 

      Mateos Sánchez, Esperanza; 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 ...
    • Thumbnail

      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, Elsa; Iradi Arteagaga, 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 ...
    • Thumbnail

      Binormal Motion of Curves with Constant Torsion in 3-Spaces 

      Arroyo Olea, Josu; Garay Bengoechea, Oscar Jesús; Pámpano Llarena, Álvaro (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 ...
    • Thumbnail

      CALE: Learning by Example in Mathematics with Applets in Mathematical Computational Packages 

      Martínez Fernández, Luis; Gutiérrez García, Francisco Javier; Legarreta Solaguren, Leire; Malaina Celada, Iker; Mardones Pérez, Iraide (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 ...
    • Thumbnail

      Cohomologically Kähler manifolds with no Kähler metrics 

      Fernández Rodríguez, María Luisa; Muñoz, Vicente; Santisteban Elorriaga, José Antonio (Hindawi Publishing Corporation, 2003)
      We show some examples of compact symplectic solvmanifolds, of dimension greater than four, which are cohomologically Kähler and do not admit Kähler metric since their fundamental groups cannot be the fundamental group ...
    • Thumbnail

      Constant mean curvature hypersurfaces with constant δ-invariant 

      Chen, Bang-Yen; Garay Bengoechea, Oscar Jesús (Hindawi Publishing Corporation, 2003)
      We completely classify constant mean curvature hypersurfaces (CMC) with constant δ-invariant in the unit 4-sphere S4 and in the Euclidean 4-space E4.
    • Thumbnail

      Enhancing Confusion Entropy (CEN) for binary and multiclass classification 

      Delgado, Rosario; Núñez González, José David (Public Library Science, 2019-01-14)
      Different performance measures are used to assess the behaviour, and to carry out the comparison, of classifiers in Machine Learning. Many measures have been defined on the literature, and among them, a measure inspired ...
    • Thumbnail

      Estimation of preterm labor immediacy by nonlinear methods 

      Malaina Celada, Iker; Martínez Fernández, Luis; Matorras Weinig, José Roberto; Bringas Roldán, Carlos; Aranburu Laka, Larraitz; Fernández-Llebrez del Rey, Luis; González, Leire; Arana, Itziar; Pérez Pinilla, Martín Blas; Martínez de la Fuente Martínez, Ildefonso Abel (Public Library Science, 2017-06-01)
      Preterm delivery affects about one tenth of human births and is associated with an increased perinatal morbimortality as well as with remarkable costs. Even if there are a number of predictors and markers of preterm delivery, ...
    • Thumbnail

      Global Self-Organization of the Cellular Metabolic Structure 

      Martínez de la Fuente Martínez, Ildefonso Abel; Martínez Fernández, Luis; Pérez Samartín, Alberto Luis; Ormaetxea Butrón, Leyre; Amezaga, Cristian; Vera López, Antonio (Public Library Science, 2008-08)
      Background: Over many years, it has been assumed that enzymes work either in an isolated way, or organized in small catalytic groups. Several studies performed using "metabolic networks models'' are helping to understand ...
    • Thumbnail

      Global Self-Regulation of the Cellular Metabolic Structure 

      Martínez de la Fuente Martínez, Ildefonso Abel; Vadillo Arroyo, Fernando; Pérez Samartín, Alberto Luis; Pérez Pinilla, Martín Blas; Bidaurrazaga Van Dierdonck, Joseba; Vera López, Antonio (Public Library of Science, 2010-03-02)
      Background: Different studies have shown that cellular enzymatic activities are able to self-organize spontaneously, forming a metabolic core of reactive processes that remain active under different growth conditions while ...
    • Thumbnail

      How Do We Create Experiences for Students That Connect with What They Care About? 

      Legarreta Solaguren, Leire; Gutiérrez García, Francisco Javier; Malaina Celada, Iker; Mardones Pérez, Iraide; Martínez Fernández, Luis (MDPI, 2018-10-26)
      The main aim of this work is to describe the process by which some students, participating in a teaching experiment, recreate with guidance material and personal attendance some advanced concepts at the doctoral level. ...
    • Thumbnail

      Modeling the Ascorbate-Glutathione Cycle in Chloroplasts under Light/Dark Conditions 

      Valero, Edelmira; Macià, Hermenegilda; Martínez de la Fuente Martínez, Ildefonso Abel; Hernández, José Antonio; González Sánchez, María Isabel; García Carmona, Francisco (Biomed Central, 2016-01-22)
      Background: Light/dark cycles are probably the most important environmental signals that regulate plant development. Light is essential for photosynthesis, but an excess, in combination with the unavoidable presence of ...
    • Thumbnail

      On the Dynamics of the Adenylate Energy System: Homeorhesis vs Homeostasis 

      Martínez de la Fuente Martínez, Ildefonso Abel; Cortés Díaz, Jesús María; Valero, Edelmira; Desroches, Mathieu; Rodrigues, Serafim; Malaina Celada, Iker; Martínez Fernández, Luis (Public Library Science, 2014-10-10)
      Biochemical energy is the fundamental element that maintains both the adequate turnover of the biomolecular structures and the functional metabolic viability of unicellular organisms. The levels of ATP, ADP and AMP reflect ...
    • Thumbnail

      Orness For Idempotent Aggregation Functions 

      Legarreta Solaguren, Leire; Lizasoain, Inmaculada; Mardones Pérez, Iraide (MDPI, 2017-09-20)
      Aggregation functions are mathematical operators that merge given data in order to obtain a global value that preserves the information given by the data as much as possible. In most practical applications, this value is ...
    • Thumbnail

      Problem-Based Teaching through Video Podcasts for Coding and Cryptography 

      Malaina Celada, Iker; Gutiérrez García, Francisco Javier; Legarreta Solaguren, Leire; Mardones Pérez, Iraide; Martínez Fernández, Luis (MDPI, 2018-10-31)
      In this work we present the development and preliminary evaluation of several problem-based video podcasts addressed to students of the subject “Coding and Cryptography”. Specifically, this experiment has been carried out ...
    • Thumbnail

      Soil Erosion and Forests Biomass as Energy Resource in the Basin of the Oka River in Biscay, Northern Spain 

      Mateos Sánchez, Esperanza; Edeso Fito, José Miguel; Ormaetxea Butrón, Leyre (MDPI, 2017-07)
      The aim of this work has been the development of a methodology for the evaluation of residual forest biomass in Biscay, a province in northern Spain. The study area is located in the Oka river basin, an area of great ...
    • Thumbnail

      Spatial Distribution of Biomass and Woody Litter for Bio-Energy in Biscay (Spain) 

      Mateos Sánchez, Esperanza; Ormaetxea Butrón, Leyre (MDPI, 2018-05)
      Forest management has been considered a subject of interest, because they act as carbon (C) sinks to mitigate CO2 emissions and also as producers of woody litter (WL) for bio-energy. Overall, a sustainably managed system ...
    • Thumbnail

      Sustainable Renewable Energy by Means of Using Residual Forest Biomass 

      Mateos Sánchez, Esperanza; Ormaetxea Butrón, Leyre (MDPI, 2018-12-21)
      The substitution of energy based on fossil fuel by bioenergy could be an effective solution to reduce external energy dependency, thereby promoting sustainable development. This article details a study of the use of biomass ...
    • Thumbnail

      The Metabolic Core and Catalytic Switches Are Fundamental Elements in the Self-Regulation of the Systemic Metabolic Structure of Cells 

      Martínez de la Fuente Martínez, Ildefonso Abel; Cortés Díaz, Jesús María; Pérez Pinilla, Martín Blas; Ruiz Rodríguez, Vicente; Veguillas Losada, Juan Emilio (Public Library of Science, 2011-11-18)
      Background: Experimental observations and numerical studies with dissipative metabolic networks have shown that cellular enzymatic activity self-organizes spontaneously leading to the emergence of a metabolic core formed ...