Fuzzy Inference System for VOLT/VAR control in distribution substations in isolated power systems

This paper presents a fuzzy inference system for voltage/reactive power control in distribution substations. The purpose is go forward to automation distribution and its implementation in isolated power systems where control capabilities are limited and it is common using the same applications as in continental power systems. This means that lot of functionalities do not apply and computational burden generates high response times. A fuzzy controller, with logic guidelines embedded based upon heuristic rules resulting from operators at dispatch control center past experience, has been designed. Working as an on-line tool, it has been tested under real conditions and it has managed the operation during a whole day in a distribution substation. Within the limits of control capabilities of the system, the controller maintained successfully an acceptable voltage profile, power factor values over 0,98 and it has ostensibly improved the performance given by an optimal power flow based automation system

Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron II. Observations of 3C 273 at minimum activity

RadioAstron is a 10 m orbiting radio telescope mounted on the Spektr-R satellite, launched in 2011, performing Space Very Long Baseline Interferometry (SVLBI) observations supported by a global ground array of radio telescopes. With an apogee of about 350 000 km, it is offering for the first time the possibility to perform {\mu}as-resolution imaging in the cm-band. We present observations at 22 GHz of 3C 273, performed in 2014, designed to reach a maximum baseline of approximately nine Earth diameters. Reaching an angular resolution of 0.3 mas, we study a particularly low-activity state of the source, and estimate the nuclear region brightness temperature, comparing with the extreme one detected one year before during the RadioAstron early science period. We also make use of the VLBA-BU-BLAZAR survey data, at 43 GHz, to study the kinematics of the jet in a 1.5-year time window. We find that the nuclear brightness temperature is two orders of magnitude lower than the exceptionally high value detected in 2013 with RadioAstron at the same frequency (1.4x10^13 K, source-frame), and even one order of magnitude lower than the equipartition value. The kinematics analysis at 43 GHz shows that a new component was ejected 2 months after the 2013 epoch, visible also in our 22 GHz map presented here. Consequently this was located upstream of the core during the brightness temperature peak. These observations confirm that the previously detected extreme brightness temperature in 3C 273, exceeding the inverse Compton limit, is a short-lived phenomenon caused by a temporary departure from equipartition. Thus, the availability of interferometric baselines capable of providing {\mu}as angular resolution does not systematically imply measured brightness temperatures over the known physical limits for astrophysical sources.Comment: Accepted for publication in A&

Pattern recognition applying LDA and LR to optoelectronic signals of optical scanning systems

[ES] Este artículo da seguimiento a previas experimentaciones actualmente publicadas acerca de la minimización de ruido ópticoeléctrico en los sistemas de barrido óptico OSS (en inglés, Optical Scanning Systems), implementando técnicas computacionales para el reconocimiento de los patrones que se generan de cada fuente de referencia y que son utilizadas para indicar una coordenada que el OSS monitoreará. Técnicas como análisis linear discriminante LDA (en inglés, Linear Discriminant Analysis) y regresión lineal LR (en inglés, Linear Regression) fueron implementadas para discriminar las señales causadas por otras fuentes distintas a las de referencia. Para aumentar la eficiencia de estos modelos fueron implementados codificación predictiva lineal LPC (en inglés, Linear Predictive Coding) y Cuantiles como extractores de características. Los resultados fueron alentadores con tasas de reconocimiento mayores al 91.2 %, alcanzando en algunos casos una exactitud del 100 %.[EN] This paper is a follow-up to previous researches already published regarding the minimization of optical-electrical noise in optical scanning systems OSS, by the implementation of computational techniques for pattern recognition generated by each reference source used to indicate a coordinate that the OSS will be monitoring. Techniques such as linear discriminant analysis LDA and linear regression LR were implemented in order to discriminate the signals caused by other sources different to the references. In order to enhance the efficiency of these models was implemented linear predictive coding LPC and quantiles as features extractors. The results were encouraging with rates of recognition greater than 91.2 %, reaching in some cases an accuracy of 100 %.Miranda-Vega, JE.; Rivas-López, M.; Flores-Fuentes, W.; Sergiyenko, O.; Lindner, L.; Rodríguez-Quiñonez, JC. (2020). Reconocimiento de patrones aplicando LDA y LR a señales optoelectrónicas de sistemas de barrido óptico. Revista Iberoamericana de Automática e Informática industrial. 17(4):401-411. https://doi.org/10.4995/riai.2020.12385OJS401411174Brooks, D. R., Mims III, F. M., 2001. Development of an inexpensive handheld led-based sun photometer for the globe program. Journal of Geophysical Research: Atmospheres 106 (D5), 4733-4740. https://doi.org/10.1029/2000JD900545Cervantes, J., Taltempa, J., Lamont, F. G., Castilla, J. S. R., Rendon, A. Y., Jali- li, L. D., 2017. Análisis comparativo de las técnicas utilizadas en un sistema de reconocimiento de hojas de planta. Revista Iberoamericana de Automática e Informática industrial 14 (1), 104-114. https://doi.org/10.1016/j.riai.2016.09.005Cheng, P., John, W., Zheng, W., 2002. Large structure health dynamic monito- ring using gps technology. In: FIG XXII International Congress, Washing- ton, DC USA. pp. 1-10.Dave, N., 2013. Feature extraction methods lpc, plp and mfcc in speech recog- nition. International journal for advance research in engineering and techno- logy 1 (6), 1-4.Di Sante, R., 2015. Fibre optic sensors for structural health monitoring of aircraft composite structures: Recent advances and applications. Sensors 15 (8), 18666-18713. https://www.mdpi.com/1424-8220/15/8/18666 , https://doi.org/10.3390/s150818666Doebling, S., Farrar, C., Prime, M., Shevitz, D., 5 1996. Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: A literature review. Report. https://doi.org/10.2172/249299Feng, D., Feng, M. Q., 2017. Experimental validation of cost-effective vision- based structural health monitoring. Mechanical Systems and Signal Processing 88, 199-211. https://doi.org/10.1016/j.ymssp.2016.11.021Flores-Fuentes, W., López, M., Sergiyenko, O., González-Navarro, F. F., Rivera-Castillo, J., Hernandez-Balbuena, D., Rodríguez-Quiñonez, J., 2014. Combined application of power spectrum centroid and support vector ma- chines for measurement improvement in optical scanning systems. Signal Processing 98, 37-51. https://doi.org/10.1016/j.sigpro.2013.11.008Flores-Fuentes, W., Miranda-Vega, J. E., Rivas-López, M., Sergiyenko, O., Rodríguez-Quiñonez, J. C., Lindner, L., 2018. Comparison between different types of sensors used in the real operational environment based on optical scanning system. Sensors 18 (6). https://doi.org/10.3390/s18061684Jayalakshmi, T., Santhakumaran, A., 2011. Statistical normalization and back propagation for classification. International Journal of Computer Theory and Engineering 3 (1), 1793-8201. https://doi.org/10.7763/IJCTE.2011.V3.288Jo, H., Sim, S.-H., Tatkowski, A., Spencer Jr, B., Nelson, M. E., 2013. Feasibility of displacement monitoring using low-cost gps receivers. Structural Control and Health Monitoring 20 (9), 1240-1254. https://doi.org/10.1002/stc.1532Jung, H. K., Park, G., 2018. Integrating passive-and active-sensing techniques using an l-shaped sensor array for impact and damage localization. Journal of Intelligent Material Systems and Structures 29 (17), 3436-3443. https://doi.org/10.1177/1045389X17733059Lindner, L., Sergiyenko, O., Rodríguez-Quiñonez, J. C., Rivas-Lopez, M., Hernandez-Balbuena, D., Flores-Fuentes, W., Murrieta-Rico, F. N., Tyrsa, V., 2016. Mobile robot vision system using continuous laser scanning for industrial application. Industrial Robot: An International Journal. https://doi.org/10.1108/IR-01-2016-0048Mims, F. M., Dec 2000. Solar radiometer with light-emitting diodes as spectrally-selective detectors. Appl. Opt. 39 (34), 6517-6518. http://ao.osa.org/abstract.cfm?URI=ao-39-34-6517, https://doi.org/10.1364/AO.39.006517Miranda-Vega, J. E., Rivas-Lopez, M., Flores-Fuentes, W., Sergiyenko, O., Lindner, L., Rodríguez-Quiñonez, J. C., 2019. Implementación digital de filtros fir para la minimización del ruido óptico y optoelectrónico de un sistema de barrido óptico. Revista Iberoamericana de Automática e Informática industrial 16, 344-357. https://doi.org/10.4995/riai.2019.10210Rivera-Castillo, J., Flores-Fuentes, W., Rivas-Lopez, M., Sergiyenko, O., Gonzalez-Navarro, F. F., Rodríguez-Quiñonez, J. C., Hernandez-Balbuena, D., Lindner, L., Básaca-Preciado, L. C., 2017. Experimental image and range scanner datasets fusion in shm for displacement detection. Structural Control and Health Monitoring 24 (10), e1967. https://doi.org/10.1002/stc.1967Sergiyenko, O., Hernandez, W., Tyrsa, V., Cruz, L. F. D., Starostenko, O., Peña-Cabrera, M., 2009. Remote sensor for spatial measurements by using optical scanning. Sensors 9 (7), 5477-5492. https://doi.org/10.3390/s90705477Van der Auweraer, H., Peeters, B., 2003. Sensors and systems for structural health monitoring. Journal of Structural Control 10(2), 117-125. https://doi.org/10.1002/stc.196710.1002/stc.21X.Ba, Q.Pan, B.Ju, Z.Feng, 2017. Ultrafast displacement actuation of piezo- electric stacks with time-sequence. IEEE Transactions on Industrial Electronics 64, 2955-2961. https://doi.org/10.1002/stc.196710.1109/TIE.2016.263111

Digital Implementation of FIR Filters for the Minimize of Optical and Optoelectronic Noise of an Optical Scanning System.

[EN] There are different devices capable of discriminating optical and optoelectronic noise, however, the cost of its implementation and maintenance is expensive. This paper examines the possibility of digitally integrating Finite Impulse Response (FIR) filters into the transducer of an OSS systems to obtain better performance in a real operating environment. In this paper we propose the evaluation of the implementation of different FIR filters in different photo-sensors transducers, such as the Light-Dependent Resistor (LDR) and the Light Emitting Diode (LED).[ES] Existen distintos dispositivos capaces de discriminar el ruido óptico y optoelectrónico, sin embargo, el costo de su implementación y mantenimiento resulta costoso. Este trabajo examina la posibilidad de integrar digitalmente filtros de respuesta finita al impulso (en inglés, FIR; Finite Impulse Response) al transductor de un sistema OSS para obtener un mejor rendimiento en un ambiente real de operación. En este trabajo se propone la evaluación de la implementación de distintos filtros FIR en diferentes transductores fotosensores como lo son el resistor dependiente de luz (en inglés, LDR; Light-Dependent Resistor) y el diodo emisor de luz (en inglés, LED; Light-Emitting Diode).Miranda-Vega, JE.; Rivas-López, M.; Flores-Fuentes, W.; Sergiyenko, O.; Lindner, L.; Rodríguez-Quiñonez, JC. (2019). Implementación digital de filtros FIR para la minimización del ruido óptico y optoelectrónico de un sistema de barrido óptico. Revista Iberoamericana de Automática e Informática. 16(3):344-357. https://doi.org/10.4995/riai.2019.10210SWORD34435716

Direct Polyphenol Attachment on the Surfaces of Magnetite Nanoparticles, Using Vitis vinifera, Vaccinium corymbosum, or Punica granatum

This study presents an alternative approach to directly synthesizing magnetite nanoparticles (MNPs) in the presence of Vitis vinifera, Vaccinium corymbosum, and Punica granatum derived from natural sources (grapes, blueberries, and pomegranates, respectively). A modified co-precipitation method that combines phytochemical techniques was developed to produce semispherical MNPs that range in size from 7.7 to 8.8 nm and are coated with a ~1.5 nm thick layer of polyphenols. The observed structure, composition, and surface properties of the MNPs@polyphenols demonstrated the dual functionality of the phenolic groups as both reducing agents and capping molecules that are bonding with Fe ions on the surfaces of the MNPs via –OH groups. Magnetic force microscopy images revealed the uniaxial orientation of single magnetic domains (SMDs) associated with the inverse spinel structure of the magnetite (Fe3O4). The samples’ inductive heating (H0 = 28.9 kA/m, f = 764 kHz), measured via the specific loss power (SLP) of the samples, yielded values of up to 187.2 W/g and showed the influence of the average particle size. A cell viability assessment was conducted via the MTT and NRu tests to estimate the metabolic and lysosomal activities of the MNPs@polyphenols in K562 (chronic myelogenous leukemia, ATCC) cells

New Cationic fac-[Re(CO)3(deeb)B2]+ Complex, Where B2 Is a Benzimidazole Derivative, as a Potential New Luminescent Dye for Proteins Separated by SDS-PAGE

Indexación ScopusSodium-dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) can be used to separate proteins based mainly on their size such as in denaturing gels. Different staining methods have been reported to observe proteins in the gel matrix, where the most used dyes are generally anionic. Anionic dyes allow for interactions with protonated amino acids, retaining the dye in the proteins. Fluorescent staining is an alternative technique considered to be sensitive, safe, and versatile. Some anionic complexes based on d6 transition metals have been used for this purpose, where cationic dyes have been less explored in this context. In this work, we synthesized and characterized a new monocationic rhenium complex fac-[Re(CO)3(deeb)B2]+ (where deeb is 4,4′-bis(ethoxycarbonyl)-2,2′-bpy and B2 is 2,4-di-tert-butyl-6-(3H-imidazo[4,5-c]pyridine-2-yl)phenol). We carried out a structural characterization of this complex by MS+, FTIR, 1H NMR, D2O exchange, and HHCOSY. Moreover, we carried out UV-Vis, luminescence, and cyclic voltammetry experiments to understand the effect of ligands on the complex’s electronic structure. We also performed relativistic theoretical calculations using the B3LYP/TZ2P level of theory and R-TDDFT within a dielectric continuum model (COSMO) to better understand electronic transitions and optical properties. We finally assessed the potential of fac-[Re(CO)3(deeb)B2]+ (as well as the precursor fac-Re(CO)3(deeb)Br and the free ligand B2) to stain proteins separated by SDS-PAGE. We found that only fac-[Re(CO)3(deeb)B2]+ proved viable to be directly used as a luminescent dye for proteins, presumably due to its interaction with negatively charged residues in proteins and by weak interactions provided by B2. In addition, fac-[Re(CO)3(deeb)B2]+ seems to interact preferentially with proteins and not with the gel matrix despite the presence of sodium dodecyl sulfate (SDS). In future applications, these alternative cationic complexes might be used alone or in combination with more traditional anionic compounds to generate counterion dye stains to improve the process. © Copyright © 2021 Carreño, Gacitúa, Solis-Céspedes, Páez-Hernández, Swords, Meyer, Preite, Chávez, Vega and Fuentes.https://www.frontiersin.org/articles/10.3389/fchem.2021.647816/ful

In vitro propagation from nodal segments of Lippia origanoides (chemotype A)

This research described an efficient micropropagation protocol for Lippia origanoides (Verbenaceae). Sterile seeds were used to obtain germinated seedlings in Murashige and Skoog medium (MS) supplemented with sucrose and agar. The nodal segments obtained from seedlings were grown on MS medium supplemented with different concentrations of gibberellic acid (GA), benzylaminopurine (BAP) and 1-naphthalenacetic acid (NAA) with BAP. The callus induction, shoots length, shoots number and root length, were analyzed. The treatments showed high percentage of callus formation at 0.5 to 1.5 mg L-1 of BAP alone or in combination with NAA (0.1 mg L-1). The highest value of shoot number per nodal segments was obtained at 1.5 mg L-1 of BAP (4.3 ± 0.8). The obtained plantlets were better rooted in vitro in the absence of plant growth regulators (PGRs) and they showed acclimatization rate of 90%. We reported a protocol for in vitro propagation and acclimatization of L. origanoides for A chemotypes from Colombia

Medios de comunicación y derecho a la información en Jalisco, 2015

El octavo informe Q ITESO: Análisis Crítico de Medios revisa el funcionamiento del sistema de comunicación política durante el proceso electoral de 2015, así como diversos aspectos relevantes de unas elecciones que culminaron con un cambio radical en el panorama político en Jalisco. En el universo de los medios de comunicación, se analizan los cambios experimentados por estos en el marco de la coyuntura electoral local, la equidad y profundidad en la cobertura por parte de los periódicos y la difusión que hicieron de las encuestas, así como el discurso e impacto de la propaganda difundida a través de la televisión y la Internet, a lo que se suma los debates registrados en redes sociales como Twitter, y la percepción sobre las campañas por parte de la audiencia tapatía. El examen político se enfoca en la campaña realizada por los candidatos independientes, el planteamiento socioeconómico de los contendientes por la capital del estado y el impacto electoral de un personaje incómodo como el papá del gobernador, para culminar este informe con una reflexión general y un balance de quiénes perdieron y quiénes ganaron al término de las elecciones de 2015.ITESO, A.C