4,834 research outputs found
Detecting synchronization in spatially extended discrete systems by complexity measurements
The synchronization of two stochastically coupled one-dimensional cellular
automata (CA) is analyzed. It is shown that the transition to synchronization
is characterized by a dramatic increase of the statistical complexity of the
patterns generated by the difference automaton. This singular behavior is
verified to be present in several CA rules displaying complex behavior.Comment: 4 pages, 2 figures; you can also visit
http://add.unizar.es/public/100_16613/index.htm
Complexity and Stochastic Synchronization in Coupled Map Lattices and Cellular Automata
Nowadays the question `what is complexity?' is a challenge to be answered.
This question is triggering a great quantity of works in the frontier of
physics, biology, mathematics and computer science. Even more when this century
has been told to be the century of Complexity. Although there seems to be no
urgency to answer the above question, many different proposals that have been
developed to this respect can be found in the literature. In this context,
several articles concerning statistical complexity and stochastic processes are
collected in this chapter.Comment: 21 pages, 13 figures, 1 table; Chapter to appear in the Free Book
"Stochastic Control", Ed. Sciyo.com, Setember 201
A method to discern complexity in two-dimensional patterns generated by coupled map lattices
Complex patterns generated by the time evolution of a one-dimensional
digitalized coupled map lattice are quantitatively analyzed. A method for
discerning complexity among the different patterns is implemented. The
quantitative results indicate two zones in parameter space where the dynamics
shows the most complex patterns. These zones are located on the two edges of an
absorbent region where the system displays spatio-temporal intermittency.Comment: 3 pages, 3 figures; some information about the authors:
http://add.unizar.es/public/100_16613/index.htm
Análisis de tareas relacionadas con las nociones de límite y continuidad de funciones en libros de texto españoles
Consideramos que hacer matemáticas en una variedad de situaciones y contextos es un aspecto importante de la alfabetización o desarrollo de la competencia matemática. Partiendo del marco teórico PISA (OCDE, 2013), reconocemos que trabajar con cuestiones que llevan por sí mismas a un tratamiento matemático, a la elección de métodos matemáticos y a la organización por medio de representaciones, depende frecuentemente de las situaciones en las cuales se presentan los problemas (Rico, 2006)
Short communication. Collection and characterisation of a population of Triticum boeoticum Boiss., a wild wheat species not previously found in the Mediterranean western region
En julio del 2010 se recolectó una población de trigo silvestre en una zona abandonada cerca de Madrid, España.
Esta zona posee una biodiversidad botánica elevada y un tipo de suelo muy peculiar denominado “arcillas verdes”. Se
recogió una muestra de trigo y se multiplicó y caracterizó para varios caracteres agro-morfológicos y subunidades de
gluteninas. El número cromosómico 2n de las semillas demostró que es una especie diploide de trigo y los datos de
caracterización indicaron que es Triticum boeoticum Boiss. Esta especie llegó probablemente como mala hierba del
cultivo de escaña que se producía en la zona hasta al menos la primera mitad del s. xix. Las características edáficas y
climáticas del lugar y el hecho de que no haya referencias hasta ahora de esta especie en la zona oeste de la región
Mediterránea aumentan el valor de esta adquisición para la mejora del trigo. La nueva accesión se conserva en el Centro
Nacional de Recursos Fitogenéticos y se ha depositado una hoja de herbario en el Real Jardín Botánico de Madri
Observational - relation for Sct stars using eclipsing binaries and space photometry
Delta Scuti ( Sct) stars are intermediate-mass pulsators, whose
intrinsic oscillations have been studied for decades. However, modelling their
pulsations remains a real theoretical challenge, thereby even hampering the
precise determination of global stellar parameters. In this work, we used space
photometry observations of eclipsing binaries with a Sct component to
obtain reliable physical parameters and oscillation frequencies. Using that
information, we derived an observational scaling relation between the stellar
mean density and a frequency pattern in the oscillation spectrum. This pattern
is analogous to the solar-like large separation but in the low order regime. We
also show that this relation is independent of the rotation rate. These
findings open the possibility of accurately characterizing this type of
pulsator and validate the frequency pattern as a new observable for
Sct stars.Comment: 11 pages, including 2 pages of appendix, 2 figures, 2 tables,
accepted for publication in ApJ
Reconsidering the roots, structure, and implications of gambling motives: An integrative approach
The present study identified Social, Financial, and Fun/thrill-related gambling motives factors,
but also a fourth factor in which some positive and negative reinforcement-based
motives were grouped into a single and broader Affect regulation factor. This Affect regulation
factor shared variance both with BIS and BAS-related measures, and was the only
direct predictor of disordered gambling symptoms. The Fun/thrill factor was directly related
to frequency of participation in high-arousal, skill-based games, and all factors were related
to participation in lower-arousal, chance games (with Social motives negatively predicting
both participation in the latter and total severity). In the SEM model, measures of BIS/BAS
sensitivity were connected to gambling behavior only through gambling motives. Based on
measures of items’ specificity, a shortened Spanish scale (the brief Gambling Motives
Inventory, bGMI) is proposed to assess gambling motives in accordance with the observed
4-factor structure.This work is supported by a grant from
the Spanish Government (Ministerio de Economía
y Competitividad, Secretaría de Estado de
Investigación, Desarrollo e Innovación;
Convocatoria 2017 de Proyectos I+D de
Excelencia, Spain; co-funded by the Fondo Europeo
de Desarrollo Regional, FEDER, European Union),
with reference number PSI2017-85488-P
Polyethylenimine-Based SiRNA Nanocomplexes Reprogram Tumor-Associated Dendritic Cells via TLR5 to Elicit Therapeutic Antitumor Immunity
Endoscopic ultrasound-guided injection of coils for the treatment of refractory post-ERCP bleeding
No presenta resumen.Revisión por pare
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