Notas sobre el género Marsilea en España.

Sin resume

Chiral flow in a binary mixture of two-dimensional active disks

We study, experimentally, the dynamics of a binary mixture of air-fluidized disks. The disks are chiral since they incorporate a set of blades with constant tilt. Both species are identical except for their blades tilt angle, which is rotated by 180o in the second species. We analyze the phase behavior of the system. Our analysis reveals a wide range of different fluid dynamics, including chiral flow. This chiral flow features in its base state a large vortex. We report, for certain ranges of relative particle density of each species, inversion of the vorticity of this vortex. We discuss on the possible mechanisms behind these chiral flow transitions.Comment: Additional data can be found in: https://doi.org/10.5281/zenodo.664770

FPGA Implementations Comparison of Neuro-cortical Inspired Convolution Processors for Spiking Systems

Image convolution operations in digital computer systems are usually very expensive operations in terms of resource consumption (processor resources and processing time) for an efficient Real-Time application. In these scenarios the visual information is divided in frames and each one has to be completely processed before the next frame arrives. Recently a new method for computing convolutions based on the neuro-inspired philosophy of spiking systems (Address-Event-Representation systems, AER) is achieving high performances. In this paper we present two FPGA implementations of AERbased convolution processors that are able to work with 64x64 images and programmable kernels of up to 11x11 elements. The main difference is the use of RAM for integrators in one solution and the absence of integrators in the second solution that is based on mapping operations. The maximum equivalent operation rate is 163.51 MOPS for 11x11 kernels, in a Xilinx Spartan 3 400 FPGA with a 50MHz clock. Formulations, hardware architecture, operation examples and performance comparison with frame-based convolution processors are presented and discussed.Ministerio de Ciencia e Innovación TEC2006-11730-C03-02Junta de Andalucía P06-TIC-0141

On the AER Convolution Processors for FPGA

Image convolution operations in digital computer systems are usually very expensive operations in terms of resource consumption (processor resources and processing time) for an efficient Real-Time application. In these scenarios the visual information is divided into frames and each one has to be completely processed before the next frame arrives in order to warranty the real-time. A spike-based philosophy for computing convolutions based on the neuro-inspired Address-Event- Representation (AER) is achieving high performances. In this paper we present two FPGA implementations of AER-based convolution processors for relatively small Xilinx FPGAs (Spartan-II 200 and Spartan-3 400), which process 64x64 images with 11x11 convolution kernels. The maximum equivalent operation rate that can be reached is 163.51 MOPS for 11x11 kernels, in a Xilinx Spartan 3 400 FPGA with a 50MHz clock. Formulations, hardware architecture, operation examples and performance comparison with frame-based convolution processors are presented and discussed.Ministerio de Ciencia e Innovación TEC2006-11730-C03-02Ministerio de Ciencia e Innovación TEC2009-10639-C04-02Junta de Andalucía P06-TIC-0141

An AER Spike-Processing Filter Simulator and Automatic VHDL Generator Based on Cellular Automata

Spike-based systems are neuro-inspired circuits implementations traditionally used for sensory systems or sensor signal processing. Address-Event- Representation (AER) is a neuromorphic communication protocol for transferring asynchronous events between VLSI spike-based chips. These neuro-inspired implementations allow developing complex, multilayer, multichip neuromorphic systems and have been used to design sensor chips, such as retinas and cochlea, processing chips, e.g. filters, and learning chips. Furthermore, Cellular Automata (CA) is a bio-inspired processing model for problem solving. This approach divides the processing synchronous cells which change their states at the same time in order to get the solution. This paper presents a software simulator able to gather several spike-based elements into the same workspace in order to test a CA architecture based on AER before a hardware implementation. Furthermore this simulator produces VHDL for testing the AER-CA into the FPGA of the USBAER AER-tool.Ministerio de Ciencia e Innovación TEC2009-10639-C04-0

Physical properties of a new dipeptide ionic liquid in water and methanol at several temperatures: Correlation and prediction

Financiado para publicación en acceso aberto: Universidade de Vigo/CISUGThe physical properties of choline glycylglycinate (ChGlyGly) were experimentally determined at several temperatures. The empirical values of density, refractive index, speed of sound and dynamic viscosity for aqueous and methanolic mixtures of this ionic liquid were also ascertained at different temperatures. From these values, isentropic compressibility, molar volume, free volume, isobaric thermal expansivity and molar refraction have been calculated along with critical parameters (temperature, volume and pressure), acentric factor and boiling point. From a theoretical point of view, derived values of the neat ChGlyGly and the corresponding mixtures have been ascertained in the abovementioned temperature interval. Polynomial fittings turned to suitably describe the obtained data while Redlich-Kister has been used to fit to the derived magnitudes. To conclude, the density of the mixtures has been successfully predicted at several temperatures for the first time by means of different modelsMinisterio de Ciencia, Innovación y Universidades | Ref. RTI2018-094702-B-I0

Un ejercicio de acceso a la información sobre la eficiencia en el combate contra la trata de personas en México1

ResumenUn ejercicio de acceso a la información sobre la eficiencia en el combate a la trata de personas en México contiene tres apartados: Metodología, Acceso a la información, Procuración e impartición de justicia en materia de trata de personas, así como sus respectivas conclusiones. La trata de personas, denominada “la esclavitud del siglo xxi”, es el comercio de seres humanos que reviste distintas modalidades, entre ellas, la explotación sexual, la explotación laboral, la mendicidad forzada, la extracción de órganos, el matrimonio forzoso, trabajo o servicios forzados y la experimentación biomédica ilícita.El Observatorio Nacional Ciudadano de Seguridad, Justicia y Legalidad presenta este texto con el objetivo de describir parte de lo que sucede en la cadena de justicia en la materia, por lo que se generaron bases de datos estadísticos de la información oficial disponible sobre el número de víctimas que de 2010 a 2013 han detectado las procuradurías estatales; el número de detenidos y sentenciados por este delito; el perfil de las víctimas, y cómo y dónde se realiza el delito. Los resultados demuestran que hay un 2% de efectividad en relación con el número de víctimas, en contraste con el de sentencias condenatorias; y en contraste con el incumplimiento de las entidades y la federación, quienes no generan información estadística confiable y de fácil acceso, lo cual es su obligación. Lo anterior pone en evidencia la falta de una política pública contundente para combatir este fenómeno, debido a que no se cuenta con un diagnóstico oficial sobre las dimensiones y gravedad de este problema en nuestro país.AbstractAn exercise of access to information on the efficiency in combating trafficking in persons in Mexico, contains three sections: Methodology, Access to Information, Procurement and delivery of justice in human trafficking, and their respective conclusions. Trafficking known as slavery of the XXI century is the trade in human beings that takes different forms, including sexual exploitation, labor exploitation, organ removal, forced marriage, forced labor or services and illicit biomedical experimentation.Observatorio Nacional Ciudadano presents this text with the aim of describing what happens in the chain of justice in the matter, statistical databases of official information were generated to measure, with the available information, the number of victims from 2010 to 2013 the state prosecutors have detected, the number of detainees and convicted of this crime, the victim profile, how and where the offense is committed. The results show that there is a 2% success rate in relation to the number of victims in contrast to that of convictions; entities and federation fail to meet the obligation to generate reliable statistical information and easily accessible. This highlights the lack of a strong public policy to combat this phenomenon, because there is no official diagnosis of the extent and severity of this problem in our country