Rayleigh--Taylor turbulence in two dimensions

The first consistent phenomenological theory for two and three dimensional Rayleigh--Taylor (RT) turbulence has recently been presented by Chertkov [Phys. Rev. Lett. {\bf 91} 115001 (2003)]. By means of direct numerical simulations we confirm the spatio/temporal prediction of the theory in two dimensions and explore the breakdown of the phenomenological description due to intermittency effects. We show that small-scale statistics of velocity and temperature follow Bolgiano-Obukhov scaling. At the level of global observables we show that the time-dependent Nusselt and Reynolds numbers scale as the square root of the Rayleigh number. These results point to the conclusion that Rayleigh-Taylor turbulence in two and three dimensions, thanks to the absence of boundaries, provides a natural physical realization of the Kraichnan scaling regime hitherto associated with the elusive ``ultimate state of thermal convection''.Comment: 4 pages, 5 figure

Evolving Aesthetic Maps for a Real Time Strategy Game

Artículo publicado en congreso SEED'2013 (I Spanish Symposium on Entertainment Computing), Septiembre 2013, Madrid.This paper presents a procedural content generator method that have been able to generate aesthetic maps for a real-time strategy game. The maps has been characterized based on several of their properties in order to de ne a similarity function between scenarios. This function has guided a multi-objective evolution strategy during the process of generating and evolving scenarios that are similar to other aesthetic maps while being di erent to a set of non-aesthetic scenarios. The solutions have been checked using a support-vector machine classi er and a self-organizing map obtaining successful results (generated maps have been classi ed as aesthetic maps)

Performance Evaluation of cuDNN Convolution Algorithms on NVIDIA Volta GPUs

Convolutional neural networks (CNNs) have recently attracted considerable attention due to their outstanding accuracy in applications, such as image recognition and natural language processing. While one advantage of the CNNs over other types of neural networks is their reduced computational cost, faster execution is still desired for both training and inference. Since convolution operations pose most of the execution time, multiple algorithms were and are being developed with the aim of accelerating this type of operations. However, due to the wide range of convolution parameter configurations used in the CNNs and the possible data type representations, it is not straightforward to assess in advance which of the available algorithms will be the best performing in each particular case. In this paper, we present a performance evaluation of the convolution algorithms provided by the cuDNN, the library used by most deep learning frameworks for their GPU operations. In our analysis, we leverage the convolution parameter configurations from widely used the CNNs and discuss which algorithms are better suited depending on the convolution parameters for both 32 and 16-bit floating-point (FP) data representations. Our results show that the filter size and the number of inputs are the most significant parameters when selecting a GPU convolution algorithm for 32-bit FP data. For 16-bit FP, leveraging specialized arithmetic units (NVIDIA Tensor Cores) is key to obtain the best performance.This work was supported by the European Union's Horizon 2020 Research and Innovation Program under the Marie Sklodowska-Curie under Grant 749516, and in part by the Spanish Juan de la Cierva under Grant IJCI-2017-33511Peer ReviewedPostprint (published version

Neuropathological events in an animal model resembling human fetal post-hemorrhagic hydrocephalus

Introduction: In premature newborns, intraventricular hemorrhages (IVH) probably trigger the disruption of the neurogenic ventricular zone. Most of the cases with severe IVH develop post-hemorrhagic hydrocephalus (PHH). A mouse model with IVH has been developed to research into the common neuropathological events present in PHH and into possible therapies. Methods: In two-day-old mice, the blood serum from littermates was injected into the ganglionic eminence of one hemisphere or both hemispheres. Fourteen days later, a histopathological analysis was carried out. In the case of injection in one hemisphere, the effects were compared with the contralateral non-injected hemisphere. Results: Mice with IVH developed the following neuropathological effects. The ependyma was found denuded and replaced by reactive astrocytes. A reaction of astrocytes over-expressing aquaporin-4 and of NG2 cells was also found developed in the white matter. Alterations in the neurogenesis were also common in the ventricular zone and in the white matter. Conclusions: The animal model of IVH developed shows similar neuropathological events to other forms of congenital hydrocephalus and can be used to research into therapies for PHH.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. PI15/0619 (ISCIII/FEDER) to AJJ

Un curioso aniversario: el primer siglo de los comics.

Sin resume

IPSC differentiation into ependymal progenitors to treat ventricular damage during hydrocephalus

Introduction: During both obstructive congenital hydrocephalus and post-hemorrhagic hydrocephalus additional pathological events are intimately associated with their ethiology: a) a detrimental inflammatory response; b) severe damage of the underlying periventricular nervous tissue, including white matter, and c). Therapeutic approaches have been directed to overcome a) and b), however recovery of damaged neuroepithelium/ependyma is, in our present, an important therapeutic gap. Methods: Human and mouse induced pluripotent stem cells (iPSC) have been artificially differented into ependymal progenitors. Intracerebroventricular (ICV) injections of iPCS are performed ex vivo and in vivo in the damaged ventricular wall. Their integration and differentiation has been studied by immunohistochemistry and histopathological analysis. Results: Mice and human ependymal progenitors are able to integrate and differentiate into ependyma in damaged ventricular wall. Stage of ependymal differentiation by the time of the injection defined different degrees of integration. Conclusions: IPSC appear to be a good ependymal progenitor source with no ethical controversy associated.RyC 2014-16980 Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

Estrategia didáctica para un aprendizaje significativo en la enseñanza de los números enteros en los séptimos grados, del Instituto Nacional Juan XIII en el Municipio de San Marcos, Carazo

Este trabajo final presenta una estrategia didáctica aplicada para la enseñanza de los números enteros en los séptimos grados, realizado en el Instituto Nacional Juan XIII, en la Ciudad de San Marcos, Carazo. Se utilizó estrategia didáctica a modo de juegos y actividades, en el que se puede aprender a realizar operaciones básicas con números enteros. Las experiencias en el aula de clase muestran que los números enteros, es un eje muy importante en el conocimiento de la matemática, es por esto que esta propuesta de trabajo busca apoyar el proceso de enseñanza aprendizaje de los estudiantes de los séptimos grados, para ello se toma el constructivismo como una forma de apoyar este trabajo. Para cumplir con este objetivo se inicia con la elaboración de diferentes instrumentos que permitan al docente ver la concepción que tiene el estudiante de los conceptos de los números positivos, negativos y solución de ejercicios, luego se propone iniciar una transcripción del lenguaje cotidiano al simbolismo matemático. Se compararon los resultados obtenidos del grupo seleccionado al azar de estudiantes al cual se le aplicó una estrategia didácticas basadas en actividades sencillas como juegos y resolución de problemas. Los resultados muestran un alto grado de motivación hacia el aprendizaje en los estudiantes que participaron en la estrategia didáctica aplicada

MEDIDAS RELATIVAS A LA RESTITUCIÓN O RETORNO DE MENORES EN LOS SUPUESTOS DE SUSTRACCIÓN INTERNACIONAL

PAPER PRESENTADO EN EL XVI World Congress on Procedural Law, KOBE, JAPÓN, 2019La sustracción internacional de menores tiene lugar cuando una persona, con base en una atribuida responsabilidad parental sobre un menor, retiene o traslada ilícitamente a éste a un país distinto del de su lugar de residencia sin el consentimiento del otro progenitor o de los dos progenitores, o sin autorización judicial. Las medidas procesales que se prevén para la solución de estos conflictos tienden a la restitución o retorno inmediato del menor a su lugar habitual de residencia, si efectivamente se constata que la retención o traslado han sido ilícitos