Artículos 2017
Recent Submissions
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Microstructure of as-cast single and twin roller melt-spun Ni 2MnGa ribbons
(2017)Stoichiometric Ni2MnGa alloys are processed by two rapid solidification techniques - single-roller (SR) and twin-roller (TR) melt spinning -, and the resulting microstructures and magnetic properties determined. Samples ... -
Lithium dual uptake anode materials : crystalline Fe3O4 nanoparticles supported over graphite for lithium-ion batteries
(2017)Graphite, the usual anode material for current technology of lithium ion batteries (LIB), has great advantages and its processing is widely known and industrially feasible. For improving the anode’s capacity, recent research ... -
Intercalation stage dependence of core electronic excitations in Li-intercalated graphite from inelastic X-ray scattering
(2017)Li and C 1s core-electron excitation spectra of electrochemically prepared stage-II and stage-I lithiated graphite were investigated by means of inelastic X-ray scattering spectroscopy. The near-edge structure is discussed, ... -
Time and band limiting for matrix valued functions : an integral and a commuting differential operator
(2017)The problem of recovering a signal of finite duration from a piece of its Fourier transform was solved at Bell Labs in the 1960’s, by exploiting a “miracle”: a certain naturally appearing integral operator commutes with ... -
Climatic projections of lightning in southeastern Brazil using CMIP5 models in RCP’s scenarios 4.5 and 8.5
(2017)Given the high and increasing lightning incidence over the Southeast of Brazil and the various impacts that this phenomenon generates to society, there is a growing need in predicting its occurrence, in order to minimize ... -
Entanglement generation through particle detection in systems of identical fermions
(2017)We investigate the generation of entanglement in systems of identical fermions through a process involving particle detection, focusing on the implications that this kind of processes have for the concept of entanglement ... -
Structural and magnetic influence of yttrium-for-iron substitution in cobalt ferrite
(2017)Yttrium-substituted cobalt ferrites of nominal composition CoY x Fe 1.98-xO4 , x=0; 0.1; 0.2; 0.3, were prepared using the sol-gel combustion method. A slight iron deficiency in the formulation was designed in order to ... -
Looking for fairer societies, can hard sciences help? : Comment on “Modeling human behavior in economics and social science” by Marina Dolfin, Leone Leonida and Nisrine Outada
(2017)Comment on "Modeling human behavior in economics and social science" by Marina Dolfin, Leone Leonida and Nisrine Outada. -
Escaping the trap of ’blocking’ : a kinetic model linking economic development and political competition
(2017)In this paper we present a kinetic model with stochastic game-type interactions, analyzing the relationship between the level of political competition in a society and the degree of economic liberalization. The above issue ... -
Comparative studies of hybrid functional materials based on different carbon structures decorated with nano-magnetite. Suitable application as platforms for enzyme-free electrochemical sensing of hydrogen peroxide
(2017)A simple synthesis procedure was designed to obtain hybrid materials based on graphite structures and magnetite nanoparticles. These new structures were characterized using different techniques. The results show that the ... -
Modeling polymeric gels : the role of chain flexibility on the structure of physical gels
(2017)Using molecular dynamics simulations and a simple model for chain molecules we study the gel formation under different conditions. The main characteristic of the model is the short attractive range of the non-bonding ... -
Shedding light on the entropy change found for the transition stage II→stage I of Li-ion storage in graphite
(2017)In order to examine the controversial hypothesis put forward to explain the entropy step experimentally observed for the stage II to stage I transition for lithium intercalation in graphite, a transparent statistical ... -
The lattice of congruences of a finite line frame
(2017)Let F = <F, R> be a finite Kripke frame. A congruence of F is a bisimulation of F that is also an equivalence relation on F. The set of all congruences of F is a lattice under the inclusion ordering. In this article we ... -
Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
(2017)In the mutualism established between legumes and soil bacteria known as rhizobia, bacteria from soil infect plants roots and reproduce inside root nodules where they fix atmospheric N2 for plant nutrition, receiving ... -
A methodology to determine natural radioactivity by γ spectrometry without using calibrated standard samples
(2017)When determining the radioactivity in materials by γ spectra, different processes are involved difficulting the fit. Besides, calibrated standard samples are necessary. In this work we propose a methodology to determine ... -
The fractal organization of ultradian rhythms in avian behavior
(2017)Living systems exhibit non-randomly organized biochemical, physiological, and behavioral processes that follow distinctive patterns. In particular, animal behavior displays both fractal dynamics and periodic rhythms yet ... -
Structural and magnetic properties of nanocrystalline Bi1-xLaxFeO3 (0.0 ≤ x ≤ 0.4) synthesized by a mechanochemical route
(2017)Bi1-xLaxFeO3 (0.0 ≤ x ≤ 0.4) powders were prepared by means of a solid acid-base reaction induced by mechanochemical energy. Bi, La and Fe chlorides were high-energy ball-milled with NaOH, yielding a mixture of Bi1-xLaxFeO3 ... -
Un camino hacia la derivada : secuencia de actividades para construir el concepto de velocidad instantánea empleando la velocidad media
(2017)La siguiente propuesta tiene por objetivo introducir conceptos básicos del análisis diferencial. Está destinada a estudiantes de los últimos años de nivel secundario, de nivel terciario o de los primeros años de nivel ... -
d-Dimensional KPZ equation as a stochastic gradient flow in an evolving landscape : interpretation and time evolution of its generating functional
(2017)The deterministic KPZ equation has been recently formulated as a gradient flow. Its non-equilibrium analog of a free energy—the “non-equilibrium potential” Φ[h], providing at each time the landscape where the stochastic ... -
Positivity results for indefinite sublinear elliptic problems via a continuity argument
(2017)We establish a positivity property for a class of semilinear elliptic problems involving indefinite sublinear nonlinearities. Namely, we show that any nontrivial nonnegative solution is positive for a class of problems the ...