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8 papers · 1 filter
Phase Transitions and Antiferroelectrivity in BiFeO3 from Atomic Level Simulations
M. Graf, M. Sepliarsky, S. Tinte +1
The structural and polar properties of BiFeO3 at finite temperature are investigated using an atomistic shell model fitted to first-principles calculations. Molecular Dynamics simu…
Variable exponent Sobolev spaces associated with Jacobi expansions
V. Almeida, J. J. Betancor, A. J. Castro +2
In this paper we define variable exponent Sobolev spaces associated with Jacobi expansions. We prove that our generalized Sobolev spaces can be characterized as variable exponent p…
Strain-gradient-induced switching of nanoscale domains in free-standing ultrathin films
G. D. Belletti, S. D. Dalosto, Silvia Tinte
We report first-principle atomistic simulations on the effect of local strain gradients on the nanoscale domain morphology of free-standing PbTiO ultrathin films. First, the fe…
Vertex adjacencies in the set covering polyhedron
Néstor E. Aguilera, Ricardo D. Katz, Paola B. Tolomei
We describe the adjacency of vertices of the (unbounded version of the) set covering polyhedron, in a similar way to the description given by Chvatal for the stable set polytope. W…
Screening of Obstructive Sleep Apnea with Empirical Mode Decomposition of Pulse Oximetry
Gastón Schlotthauer, Leandro E. Di Persia, Luis D. Larrateguy +1
Detection of desaturations on the pulse oximetry signal is of great importance for the diagnosis of sleep apneas. Using the counting of desaturations, an index can be built to help…
On cubic Kummer towers of Garcia, Stichtenoth and Thomas type
M. Chara, R Toledano
In this paper we initiate the study of the class of cubic Kummer type towers considered by Garcia, Stichtenoth and Thomas in 1997 by classifying the asymptotically good ones in thi…