Mejora de la evaluación de expresiones regulares sobre hardware reconfigurable

Since the Internet was born, the amount of data that systems process has increased in an exponential way and this is the reason because these systems need to be fast, flexible and powerful. Nowadays, communications keep increasing the speed requirements for data processing, and the FPGA‟s are ideal for this task. In data processing, a huge amount of time is dedicated to pattern matching, frequently involving regular expressions matching. As the amount of patterns to be checked grow up, so does the hardware complexity dedicated to its recognition. Thus it needs to be flexible to be able to adapt to the necessary changes with ease. In this project a VHDL code generator implemented in Java is presented. The code generated describes a regular expressions recognizer of various sets given by parameter, which will be synthetized by an FPGA. This module takes various sets of regular expressions and generates the VHDL code that describes the system which recognizes them. The code generator is flexible, due to great modularity and upgradeability that software offers. Thus, the main advantage of this model consists on the possibility of combining the flexibility of software with the speed of hardware in order to create fast and low cost recognizers in a flexible and easy way

Trandix: herramienta proactiva para la búsqueda terminológica del traductor y su evaluación

El presente trabajo analiza las tendencias actuales en el ámbito terminográfico así como las necesidades de los traductores con respecto a los recursos terminológicos que utilizan en sus traducciones, y presenta la herramienta Trandix, una aplicación informática novedosa que tiene como finalidad mejorar la eficiencia en las búsquedas terminológicas por parte de los traductores. Además de sus principales funcionalidades, este trabajo presenta los resultados de un experimento empírico llevado a cabo con la herramienta cuyos objetivos eran confirmar los beneficios que aporta a la labor traductora y recibir feedback para mejorar sus posibles debilidades. Esta herramienta está basada en la Teoría de las funciones (function theory), de Tarp (2008a), y en la propuesta de Spohr con sus diccionarios multifuncionales electrónicos (2009), y pretende servir de ejemplo para continuar con la investigación de recursos terminológicos que cumplan los requisitos y las expectativas de los traductores a la hora de realizar búsquedas terminológicas.This paper analyses current trends in the terminological field and translators’ needs regarding terminological resources. In this context, it presents the Trandix tool, a novel software application that intends to enhance efficiency in terminological searches conducted by translators. In addition to its main features, this paper presents the results of an empirical experiment carried out with the tool, whose main goals were to confirm the benefits that Trandix brings to translation and to receive feedback so as to improve its potential weaknesses. This tool is based on the Function Theory of Lexicography, by Tarp (2008a), and Spohr’s proposal concerning multifunctional electronic dictionaries (2009). A further goal is to serve as an example for further research in terminological resources aiming to meet translators’ requirements and expectations when searching for terminology.Este trabajo se ha realizado parcialmente en el seno del proyecto de I+D+i “INTELITERM: Sistema inteligente de gestión terminológica para traductores” (referencia n.º FFI2012-38881)

Caracterización de la corrosión por picaduras y evaluación de su influencia en la resistencia a fatiga de la aleación de aluminio 6082-T6

[Resumo] As aliaxes Al-Si-Mg son utilizadas en moitos campos da enxeñaría, especialmente en aplicacións navais pola súa resistencia mecánica, excelente soldabilidad e resistencia á corrosión, con todo no deseño das estruturas é importante ter en conta que ademais de estar sometidas a ambientes mariños, poden estar a soportar cargas cíclicas. Por tanto, é moi importante adquirir un maior coñecemento sobre o seu comportamento a fatiga cando existen na superficie picaduras provocadas por corrosión. O obxectivo principal deste traballo será caracterizar a influencia do grao de corrosión na resistencia e vida a fatiga das aliaxes AA6082-T6 precorroidas. O material de estudo é unha aliaxe de aluminio da serie Al-Si-Mg. Nos últimos anos converteuse no material máis utilizado dentro das aliaxes de resistencia media, desbancando a outras aliaxes como a aliaxe AA6061. Para levar a cabo esta investigación dispúxose como material de referencia a aliaxe sen corroer (R) e como materiais obxecto de estudo a fatiga tres aliaxes do mesma material base con distinto grado de corrosión por picaduras (C1, C2 e C3).[Resumen] Las aleaciones Al-Si-Mg son utilizadas en muchos campos de la ingeniería, especialmente en aplicaciones navales por su resistencia mecánica, excelente soldabilidad y resistencia a la corrosión, sin embargo en el diseño de las estructuras es importante tener en cuenta que además de estar sometidas a ambientes marinos, pueden estar soportando cargas cíclicas. Por tanto, es muy importante adquirir un mayor conocimiento sobre su comportamiento a fatiga cuando existen en la superficie picaduras provocadas por corrosión. El objetivo principal de este trabajo será caracterizar la influencia del grado de corrosión en la resistencia y vida a fatiga de las aleaciones AA6082-T6 precorroidas. El material de estudio es una aleación de aluminio de la serie Al-Si-Mg. En los últimos años se ha convertido en el material más utilizado dentro de las aleaciones de resistencia media, desbancando a otras aleaciones como la aleación AA6061. Para llevar a cabo esta investigación se dispuso como material de referencia la aleación sin corroer (R) y como materiales objeto de estudio a fatiga tres aleaciones del mismo material base con distinto grado de corrosión por picaduras (C1, C2 y C3).[Abstract] The alloys Al-Si-Mg are used in many fields of engineering, especially in naval applications for its mechanical strength, excellent weldability and corrosion resistance, however the design of the structures is important to note that in addition to being subjected to marine environments, may be supporting cyclic loads. It is therefore very important to acquire more knowledge about their fatigue behavior when there is pitting corrosion on the surface. The main objective of this work is to characterize the influence of the degree of corrosion in resistance and fatigue life of the alloys AA6082-T6 pre-corroded. The study material is an aluminum alloy Al-Si-Mg. In recent years it has become the most widely used material in half strength alloys, for instance the AA6082 has replaced the use of the AA6061 alloy. Uncorroded alloy (R), was available as reference material to carry out this investigation, and three alloys of the same base material with varying degrees of pitting (C1, C2 and C3)were used to identify the influence of corrosion on the fatigue properties

Hyperspectral image processing for the identification and quantification of lentiviral particles in fluid samples

Optical spectroscopic techniques have been commonly used to detect the presence of biofilm-forming pathogens (bacteria and fungi) in the agro-food industry. Recently, near-infrared (NIR) spectroscopy revealed that it is also possible to detect the presence of viruses in animal and vegetal tissues. Here we report a platform based on visible and NIR (VNIR) hyperspectral imaging for non-contact, reagent free detection and quantification of laboratory-engineered viral particles in fluid samples (liquid droplets and dry residue) using both partial least square-discriminant analysis and artificial feed-forward neural networks. The detection was successfully achieved in preparations of phosphate buffered solution and artificial saliva, with an equivalent pixel volume of 4 nL and lowest concentration of 800 TU·μL−1. This method constitutes an innovative approach that could be potentially used at point of care for rapid mass screening of viral infectious diseases and monitoring of the SARS-CoV-2 pandemic.Instituto de Salud Carlos III COV20-00080 and COV20-00173Ministerio de Ciencia e Innovación EQC2019-006240-PComisión Europea JRC HUMAINT projec

Turismo arqueológico como alternativa de desarrollo local en la Riviera Maya, Quintana Roo

Este trabajo expone la importancia del turismo arqueológico en la Riviera Maya de Quintana Roo, México, como una alternativa para el desarrollo local comunitario. A través de la construcción de un marco conceptual crítico, se parte de la tesis de que existen zonas arqueológicas descubiertas por las comunidades rurales y locales que no son reconocidas formalmente por la autoridad estatal y federal para su promoción turística y en beneficio económico para estas comunidades. Mediante observaciones participantes, entrevistas semiestructuradas y a profundidad con actores locales, los resultados muestran que además de la existencia de numerosos vestigios arqueológicos para llevar a cabo esta actividad, las comunidades han construido otra forma de ser y hacer turismo, contrapuesto a la idea dominante de este último como mercancía. La política encaminada al turismo arqueológico es contradictoria, y se recomienda que aquéllas formas emergentes de turismo arqueológico se reconozcan y apoyen como una actividad autónoma respecto del turismo oficial

Optical imaging spectroscopy for rapid, primary screening of SARS-CoV-2: a proof of concept

Effective testing is essential to control the coronavirus disease 2019 (COVID-19) transmission. Here we report a-proof-of-concept study on hyperspectral image analysis in the visible and near-infrared range for primary screening at the point-of-care of SARS-CoV-2. We apply spectral feature descriptors, partial least square-discriminant analysis, and artificial intelligence to extract information from optical diffuse reflectance measurements from 5 µL fluid samples at pixel, droplet, and patient levels. We discern preparations of engineered lentiviral particles pseudotyped with the spike protein of the SARS-CoV-2 from those with the G protein of the vesicular stomatitis virus in saline solution and artificial saliva. We report a quantitative analysis of 72 samples of nasopharyngeal exudate in a range of SARS-CoV-2 viral loads, and a descriptive study of another 32 fresh human saliva samples. Sensitivity for classification of exudates was 100% with peak specificity of 87.5% for discernment from PCR-negative but symptomatic cases. Proposed technology is reagent-free, fast, and scalable, and could substantially reduce the number of molecular tests currently required for COVID-19 mass screening strategies even in resource-limited settings.Ministerio de Ciencia e Innovación, 2020 Emergency Call for Research Projects about the SARS-CoV-2 virus and the COVID-19 disease Instituto de Salud Carlos III by Grant Number EQC2019-006240-PComisión Europea, Joint Research Center (JRC) HUMAINT project

Improving performance using computational compression through memoization: A case study using a railway power consumption simulator

The objective of data compression is to avoid redundancy in order to reduce the size of the data to be stored or transmitted. In some scenarios, data compression may help to increase global performance by reducing the amount of data at a competitive cost in terms of global time and energy consumption. We have introduced computational compression as a technique for reducing redundant computation, in other words, to avoid carrying out the same computation with the same input to obtain the same output. In some scenarios, such as simulations, graphic processing, and so on, part of the computation is repeated using the same input in order to obtain the same output, and this computation could have an important cost in terms of global time and energy consumption. We propose applying computational compression by using memoization in order to store the results for future reuse and, in this way, minimize the use of the same costly computation. Although memoization was proposed for sequential applications in the 1980s, and there are some projects that have applied it in very specific domains, we propose a novel, domain-independent way of using it in high-performance applications, as a means of avoiding redundant computation.This work has been partially supported by the Spanish Ministry of Economy and Competitiveness under the project TIN2013-41350-P (Scalable Data Management Techniques for High-End Computing Systems)

Pre-calculated duty cycle control implemented in FPGA for power factor correction

Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. A. García Ávila Fernández, Á de Castro, Ó. Muñoz García, and F. J. Azcondo, "Pre-calculated duty cycle control implemented in FPGA for power factor correction", 35th Annual Conference of IEEE Industrial Electronics, 2009. IECON '09, Porto (Portugal), 2009, pp. 2955 - 2960A power factor correction (PFC) technique based on pre-calculated duty cycle values is presented in this paper. In this method the duty ratios for half a line period are calculated in advance and stored in a memory. By synchronizing the memory with the line, near unity power factors can be achieved in a specific operating point. The main advantage of this technique is that neither current measurement nor current loop are needed. To obtain stable output voltages a voltage loop is included. A boost converter prototype controlled by an FPGA evaluation board has been implemented in order to verify the functionality of the proposed method. Both the simulation and experimental results show that near unity power factor can be achieved with this PFC strategy

Detection transposable elements in Botrytis cinerea in latent infection stage from symptomless apples

Detection of Botrytis cinerea latent infections on apples before storage is essential for effective control strategies in the fruit postharvest industry. In the present study a PCR detection method, based on primers designed on B. cinerea transposable elements (boty and flipper) and intergenic spacer (IGS) region as internal control were utilized to reveal the presence of symptomless infections on apple fruits. The method molecular proved to be highly specific and sensitive in detecting latent infections, revealed the presence of the pathogen in 83% of the samples from infected apples with 104 conidia/mL, whereas those infected with 106 conidia/mL detected 94% as compared to the traditional method that revealed the pathogen in 40 and 66% of the samples inoculated with 104 and 106 conidia/mL respectively. Furthermore, the method characterized B. cinerea as subpopulation transposa-type by the presence of the transposable elements boty and flipper The results obtained of DNA quantification method were compared with ELISA assay and these studies showed good correlation. Therefore our method has important advantages compared with others detection methods for B. cinerea, because the proposed methodology allowed distinguishes between its two subpopulations (vacuma and transposa) and this would allow establish possible control appropriate strategies. Finally, the method can be an interesting alternative for its possible application in the phytosanitary programs of the fruit industry worldwide.Fil: Fernández, Jorge Gastón. Universidad Nacional de San Luis. Facultad de Quimica, Bioquimica y Farmacia. Departamento de Quimica. Area de Quimica Analitica; ArgentinaFil: Fernández Baldo, Martín Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; ArgentinaFil: Muñoz, Claudio Javier. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Cuyo Mendoza - San Juan. Estación Experimental Agropecuaria Mendoza; ArgentinaFil: Salinas, Eloy. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Raba, Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; ArgentinaFil: Sanz Ferramola, Maria Isabel. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; Argentin

Towards AER VITE: building spike gate signal

Neuromorphic engineers aim to mimic the precise and efficient mechanisms of the nervous system to process information using spikes from sensors to actuators. There are many available works that sense and process information in a spike-based way. But there are still several gaps in the actuation and motor control field in a spike-based way. Spike-based Proportional-Integrative-Derivative controllers (PID) are present in the literature. On the other hand, neuro-inspired control models as VITE (Vector Integration To End point) and FLETE (Factorization of muscle Length and muscle Tension) are also present in the literature. This paper presents another step toward the spike implementation of those neuro-inspired models. We present a spike-based ramp multiplier. VITE algorithm generates the way to achieve a final position targeted by a mobile robotic arm. The block presented is used as a gate for the way involved and it also puts the incoming movement on speed with a variable slope profile. Only spikes for information representation were used and the process is in real time. The software simulation based on Simulink and Xilinx System Generator shows the accurate adjust to the traditional processing for short time periods and the hardware tests confirm and extend the previous simulated results for any time. We have implemented the spikes generator, the ramp multiplier and the low pass filter into the Virtex-5 FPGA and connected this with an USB-AER (Address Event Representation) board to monitor the spikes.Ministerio de Ciencia e Innovación TEC2009-10639-C04-0