Darreres entrades:
2017-01-24
13:34
Peroxynitrite formed during a transient episode of brain ischemia increases endothelium-derived hyperpolarization-type dilations in thromboxane/prostaglandin receptor-stimulated rat cerebral arteries / Onetti Vilalta, Yara (Universitat Autònoma de Barcelona. Institut de Neurociències) ; Dantas, Ana P. (Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS)) ; Pérez Fernández, Belén (Universitat Autònoma de Barcelona. Institut de Neurociències) ; McNeish, Alister J. (University of Reading. Reading School of Pharmacy) ; Vila Calsina, Elisabet (Universitat Autònoma de Barcelona. Institut de Neurociències) ; Jiménez Altayó, Francesc (Universitat Autònoma de Barcelona. Institut de Neurociències)
AIM: Increased thromboxane A2 and peroxynitrite are hallmarks of cerebral ischaemia/reperfusion (I/R). Stimulation of thromboxane/prostaglandin receptors (TP) attenuates endothelium-derived hyperpolarization (EDH). [...]
2016 - 10.1111/apha.12809
Acta Physiologica, (September 2016)  
2017-01-23
16:57
14 p, 1.1 MB Distribuyendo oportunidades : el impacto de los agrupamientos escolares en la experiencia de los estudiantes / Pàmies Rovira, Jordi (Universitat Autònoma de Barcelona. Departament de Pedagogia Sistemàtica i Social) ; Castejón, Alba (Universitat Autònoma de Barcelona. Departament de Pedagogia Sistemàtica i Social)
El presente artículo realiza una revisión de la literatura de investigación centrada en la estratificación escolar interna y los procesos de selección del alumnado, con el fin de discernir los espacios de aprendizaje y de socialización diferenciados que existen dentro de las propias escuelas. [...]
This article proposed carries out a revision of the literature of research on school internal stratification and the selection processes of students, with the purpose of discerning the different spaces of learning and socialization that exist inside the school itself. [...]

2015 - 10.7203/RASE.8.3.8388
RASE : Revista de la Asociación de Sociología de la Educación, Vol. 8 Núm. 3 (2015) , p. 335-348  
2017-01-23
16:21
Uniform isochronous cubic and quartic centers: Revisited / Artés, Joan Carles ; Itikawa, Jackson ; Llibre, Jaume
In this paper we completed the classification of the phase portraits in the Poincaré disc of uniform isochronous cubic and quartic centers previously studied by several authors. There are three and fourteen different topological phase portraits for the uniform isochronous cubic and quartic centers respectively.
2017
Journal of Computational and Applied Mathematics, Vol. 313 (2017) , p. 448-453  
2017-01-23
16:21
Centers and limit cycles of polynomial differential systems of degree 4 via averaging theory / Benterki, Rebiha ; Llibre, Jaume
In this paper we classify the phase portraits in the Poincar\'e disc of the centers of the generalized class of Kukles systems \[ =-y,=x ax^3y bxy^3, \] symmetric with respect to the y-axis, and we study, using the averaging theory up to sixth order, the limit cycles which bifurcate from the periodic solutions of these centers when we perturb them inside the class of all polynomial differential systems of degree 4.
2017 - 10.1016/j.cam.2016.08.047
Journal of Computational and Applied Mathematics, Vol. 313 (2017) , p. 273-283  
2017-01-23
16:21
On the minimum positive entropy for cycles on trees / Alsedà i Soler, Lluís  ; Juher, David ; Mañosas, Francesc
2017
Transactions of the American Mathematical Society, Vol. 369 Núm. 1 (2017) , p. 187-221  
2017-01-23
16:21
Topological Classification of Quadratic Polynomial Differential Systems with a Finite Semi-Elemental Triple Saddle / Artés, Joan Carles ; Oliveira, Regilene D. S. ; Rezende, Alex Carlucci
The study of planar quadratic differential systems is very important not only because they appear in many areas of applied mathematics but due to their richness in structure, stability and questions concerning limit cycles, for example. [...]
2016 - 10.1142/S0218127416501881
International Journal of Bifurcation and Chaos in Applied Sciences and Engineering, Vol. 26 Núm. 11 (2016) , p. 1650188 (26 pages)  
2017-01-23
16:21
On a Class of Invariant Algebraic Curves for Kukles Systems / Osuna, Osvaldo ; Rebollo-Perdomo, Salomón ; Villaseñor, Gabriel
2016 - 10.14232/ejqtde.2016.1.61
Electronic Journal of Qualitative Theory of Differential Equations, Vol. 2016 Núm. 61 (2016) , p. 1-12  
2017-01-23
16:21
Periodic orbits of perturbed elliptic oscillators in 6D via averaging theory / Lembarki, Fatima E. ; Llibre, Jaume
We provide sufficient conditions on the energy levels to guarantee the existence of periodic orbits for the perturbed elliptic oscillators in 6D using the averaging theory. We give also an analytical estimation of the shape of these periodic orbits parameterized by the energy. [...]
2016 - 10.1007/s10509-016-2930-x
Astrophysics and Space Science. An International Journal of Astronomy, Astrophysics and Space Science, 2016, p. 361-340  
2017-01-23
16:21
Hopf periodic orbits for a ratio-dependent predator-prey model with stage structure / Llibre, Jaume ; Vidal, Claudio
A ratio–dependent predator-prey model with stage structure for prey was investigated in [8]. There the authors mentioned that they were unable to show if such a model admits limit cycles when the unique equilibrium point E ∗ at the positive octant is unstable. [...]
2016 - 10.3934/dcdsb.2016026
Discrete and Continuous Dynamical Systems. Series B, Vol. 21 Núm. 6 (2016) , p. 1859-1867  
2017-01-23
16:21
Analytic reducibility of nondegenerate centers: Cherkas systems / Giné, Jaume ; Llibre, Jaume
2016 - 10.14232/ejqtde.2016.1.49
Electronic Journal of Qualitative Theory of Differential Equations, Vol. 49 (2016) , p. 1-10