Aplicación de los códigos Bidimensionales QR (Quick Response) en la prestación de los Servicios de Mantenimiento y Asistencia Técnica.

[ESP] Una de las características de las sociedades modernas es que en éstas el papel que desempeñan los servicios resulta, cuando menos, de gran importancia en la consecución de dos términos que recogen y caracterizan nuestro modo de vida y nuestro desarrollo. Por una parte está el término bienestar, entendida ésta como un conjunto de prestaciones a través de las cuales los individuos y las organizaciones pueden satisfacer ciertas necesidades de forma directa o indirecta. Por otra, la competitividad que, gracias a unos buenos servicios, las organizaciones pueden alcanzar a través de la formulación de una estrategia que aproveche las ventajas que éstos ofrecen. Es evidente que tanto los individuos como las organizaciones demandan cada vez más servicios y de mejor calidad. En este escenario todos esperamos, en primer lugar, que los servicios no fallen y cuando se produce un cese de los mismos o el nivel de calidad no se corresponde con el esperado y/o contratado, todos queremos que se restablezcan los mismos de una forma inmediata. Por ello, la importancia de los servicios desarrollados el área de SAT constituye, hoy en día, un factor clave en el logro de los dos términos anteriormente señalados de bienestar y competitividad. También es evidente que la tecnología constituye un instrumento que, bien utilizado, puede ayudarnos a ofrecer respuestas de gran valor ante las enormes exigencias que día a día plantean los usuarios finales. Es importante destacar que con una correcta selección y una formulación estratégica adecuada es posible ofrecer más valor añadido de lo que se espera por parte de los clientes sin que se tenga necesariamente que incurrir en un mayor coste. Sin duda, esta cuestión representa una ventaja competitiva para las empresas y también un elemento a través del cual se pueden estrechar lazos en las relaciones con los clientes aumentando la fidelización de los mismos. En este trabajo se pretende aprovechar el potencial que ofrecen los códigos bidimensionales, en particular los códigos QR, en los servicios y las actuaciones que tienen que llevar a cabo las empresas que desarrollan su actividad en el área de SAT y mantenimiento a través de una experiencia práctica, a modo de prueba piloto, en una empresa del sector del frío y de la climatización de ámbito nacional con la que los autores vienen trabajando en los últimos años en diferentes proyectos relacionados con la gestión del mantenimiento

The Folded Normal Distribution: A New Model for the Small-Scale Fading in Line-of-Sight (LOS) Condition

(c) 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.[EN] In this paper, a novel form of the folded normal (FN) distribution has been proposed to model the small-scale fading in wireless communications. From a multiple-input multiple-output (MIMO) measurement campaign conducted in a lab environment with the line-of-sight (LOS) conditions at both the 60 and the 94 GHz bands, the authors obtain the parameters of the Rician, FN, and kappa-mu distributions. These parameters have been calculated by using the least square (LS) approximation and with techniques of statistical inference. The FN distribution provides the best fitting to the experimental results using the Kolmogorov-Smirnov (K-S) test for the inferred estimators with values of the ful llment of 100% and 69.82% at the 60 and 94 GHz bands, respectively, for a significance level of 1%.This work was supported by the Ministerio de Economia, Industria y Competitividad of the Spanish Government under the national projects TEC2017-86779-C2-2-R and TEC2016-78028-C3-2-P, through the Agencia Estatal de Investigacion (AEI) and the Fondo Europeo de Desarrollo Regional (FEDER).Reig, J.; Rodrigo Peñarrocha, VM.; Rubio Arjona, L.; Martínez-Inglés, MT.; Molina-García-Pardo, JM. (2019). The Folded Normal Distribution: A New Model for the Small-Scale Fading in Line-of-Sight (LOS) Condition. IEEE Access. 7:77328-77339. https://doi.org/10.1109/ACCESS.2019.2921340S7732877339

Millimeter Wave MISO-OFDM Transmissions in an Intra-Wagon Environment

[EN] In this paper, the maximum achievable throughput is analyzed in the intra-wagon channel when multiple-input single-output (MISO) and orthogonal frequency division multiplexing (OFDM), MISO-OFDM, techniques are used. This analysis is performed from real wideband propagation channel measurements at 28 and 37 GHz, two potential frequency bands to deploy the future fifth-generation (5G) wireless communications networks. Four different scenarios in terms of the access point (AP) and user equipment (UE) positions inside the wagon have been considered, using 4 and 8 antennas at the AP. The performance of both quasi-orthogonal space-time block code (QSTBC), combined with Hadamard matrices, and transmit beamforming techniques is studied and evaluated from simulation results. The simulation results take into account the signal-to-noise ratio (SNR) and the antenna correlation for each antenna array configuration at the AP. These results provide useful insight to better understand the intra-wagon channel properties and deploy the future 5G wireless networks in this particular scenario at mmWave frequencies, where high-data-rates are expected to support different types of digital applications.This work was supported in part by the Ministerio de Economia y Competitividad MINECO, Spain, under Grant TEC2016-78028C3-2-P and Grant TEC2017-86779-C2-2-R and in part by the European FEDER Funds.Sanchis Borrás, C.; Molina-García-Pardo, J.; Rubio Arjona, L.; Pascual-García, J.; Rodrigo Peñarrocha, VM.; Juan Llacer, L.; Reig, J. (2021). Millimeter Wave MISO-OFDM Transmissions in an Intra-Wagon Environment. IEEE Transactions on Intelligent Transportation Systems. 22(8):4899-4908. https://doi.org/10.1109/TITS.2020.2983028S4899490822

Biochemical and MALDI-TOF Mass Spectrometric Characterization of a Novel Native and Recombinant Cystine Knot Miniprotein from <i>Solanum tuberosum</i> subsp. <i>andigenum</i> cv. Churqueña

Cystine-knot miniproteins (CKMPs) are an intriguing group of cysteine-rich molecules that combine the characteristics of proteins and peptides. Typically, CKMPs are fewer than 50 residues in length and share a characteristic knotted scaffold characterized by the presence of three intramolecular disulfide bonds that form the singular knotted structure. The knot scaffold confers on these proteins remarkable chemical, thermal, and proteolytic stability. Recently, CKMPs have emerged as a novel class of natural molecules with interesting pharmacological properties. In the present work, a novel cystine-knot metallocarboxypeptidase inhibitor (chuPCI) was isolated from tubers of Solanum tuberosum, subsp. andigenum cv. Churqueña. Our results demonstrated that chuPCI is a member of the A/B-type family of metallocarboxypeptidases inhibitors. chuPCI was expressed and characterized by a combination of biochemical and mass spectrometric techniques. Direct comparison of the MALDI-TOF mass spectra for the native and recombinant molecules allowed us to confirm the presence of four different forms of chuPCI in the tubers. The majority of such forms have a molecular weight of 4309 Da and contain a cyclized Gln in the N-terminus. The other three forms are derived from N-terminal and/or C-terminal proteolytic cleavages. Taken together, our results contribute to increase the current repertoire of natural CKMPs.Facultad de Ciencias Exacta

On the Contribution of Dense Multipath Components in an Intrawagon Environment for 5G mmW Massive MIMO Channels

© 2019 IEEE. Personal use of this material is permitted. Permissíon from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertisíng 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.[EN] In this letter, the dependence of the specular multipath components (SMC) and dense multipath components (DMC) to the interuser spatial correlation and sum-rate capacity of a massive multiuser multiple-input--multiple-output (MU-MIMO) setup is evaluated from measurements conducted inside an underground subway wagon at the 25-40 GHz candidate frequency bands for 5G systems. The radio channel consists in a 7 7 uniform rectangular array (URA) acting as access point for eight users uniformly distributed in the wagon. The DMC power ratio is observed to be distance- and frequency-dependent as the SMC and DMC exhibit different propagation mechanisms. Remarkably, it is reported that the interuser spatial correlation computed with DMC offers the best favorable propagation for a massive MIMO setup, whereas SMC contribute to the users correlation. Hence, correlation is found to be strongly dependent on the DMC ratio frequency characteristics. In addition, better interuser correlation and sum-rate capacity values are obtained as the frequency is increased. These results highlight the need to include DMC in 5G massive MIMO channel models and emulators to improve their accuracy at the system level.This work was supported in part by MINECO, Spain, under the National Projects TEC2016-78028-C3-2-P and TEC2017-86779-C2-2-R and in part by the ELSAT2020 OS4 SMARTIES program co-financed by the European Union with the European Regional Development Fund, the French state, and the Hauts de France Region Council.Challita, F.; Rodrigo Peñarrocha, VM.; Rubio Arjona, L.; Reig, J.; Juan-Llácer, L.; Pascual-García, J.; Molina-García-Pardo, J.... (2019). On the Contribution of Dense Multipath Components in an Intrawagon Environment for 5G mmW Massive MIMO Channels. IEEE Antennas and Wireless Propagation Letters. 18(12):2483-2487. https://doi.org/10.1109/LAWP.2019.2940831S24832487181

Millimeter Wave Channel Measurements in an Intra-Wagon Environment

© 2019 IEEE. Personal use of this material is permitted. Permissíon from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertisíng 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."[EN] In this correspondence, useful measurement results of the propagation channel characteristics in an intra-wagon environment at millimeter wave (mmWave) frequencies are presented. The measurements were collected inside an underground convoy from 25 to 40 GHz in the frequency domain. A broadband radio over fiber (RoF) link was used in order to avoid the high losses introduced by cables at these frequencies, thus allowing long distances between the transmitter and receiver antennas. Values of the path loss exponent and delay spread are reported at the potential 26, 28 and 38 GHz bands to deploy the future fifth-generation (5G) systems. These results allow us to have a better knowledge of the path loss and time dispersion characteristics of the propagation channel in this particular environment, characterized by rich-scattering with long delays.This work was supported by the Ministerio de Economia, Industria y Competitividad of the Spanish Government under the National Projects TEC2016-78028-C3-2-P and TEC2017-86779-C2-2-R, through the Agencia Estatal de Investigacion (AEI) and the Fondo Europeo deDesarrollo Regional (FEDER). The review of this article was coordinated by Prof. J. F. Paris. The authors would like to thank the staff of FGV who have facilitated the realization of the measurements campaing, in particular J. Iserte Villalba and F. M. Brox López.Rubio Arjona, L.; Rodrigo Peñarrocha, VM.; Molina-García-Pardo, JM.; Juan Llacer, L.; Pascual Garcia, J.; Reig, J.; Sanchis Borrás, C. (2019). Millimeter Wave Channel Measurements in an Intra-Wagon Environment. IEEE Transactions on Vehicular Technology. 68(12):12427-12431. https://doi.org/10.1109/TVT.2019.2947205S1242712431681

Hacia la personalización en masa. El caso de una mediana empresa de fabricación de muebles frigoríficos

[ESP] La presente comunicación recoge los principales aspectos relacionados con un proyecto que se está abordando y que persigue diseñar, desarrollar e implantar el sistema de información necesario que facilite a una mediana empresa fabricante de muebles frigoríficos avanzar en su inexorable camino hacia la personalización en masa. En el proyecto, además de la empresa fabricante (Exposición y Conservación de Alimentos, S.A, en adelante, Exkal), participa una “spin off” o Iniciativa Empresarial de Base Tecnológica (IEBT) surgida de la Universidad de Vigo (Imatia Innovation, S.L., en adelante, Imatia) y un equipo de investigación de dicha Universidad*. Con respecto a la estrategia de personalización en masa (mass customization), se puede indicar que desde sus inicios se ha extendido rápidamente a numerosos sectores, si bien el grado de complejidad de los proyectos difiere bastante entre ellos. Asimismo, tradicionalmente ha estado vinculada a grandes compañías, aunque también se pueden encontrar casos de empresas de menor tamaño. Este trabajo se deriva de la participación, en cuanto a sus autores universitarios, en un proyecto de investigación financiado por Imatia Innovation, S.L. con referencia IN-0091-11, titulado “Especificación funcional de un módulo de oficina técnica avanzado”. Un proyecto de personalización en masa debe incluir actuaciones en diferentes áreas (comercial, oficina técnica, producción, logística, …), desempeñando un papel protagonista el sistema de información y, en concreto, los denominados configuradores. A su vez, en este tipo de escenarios, cobra especial relevancia la relación entre los procesos ligados a presupuestos/pedidos y producción, ya que no son válidos los sistemas que trabajen con listas de materiales y operaciones fijas, sino que éstas deben poder generarse automáticamente

Contribution to the channel path loss and time-dispersion characterization in an office environment at 26 GHz

In this paper, path loss and time-dispersion results of the propagation channel in a typical office environment are reported. The results were derived from a channel measurement campaign carried out at 26 GHz in line-of-sight (LOS) and obstructed-LOS (OLOS) conditions. The parameters of both the floating-intercept (FI) and close-in (CI) free space reference distance path loss models were derived using the minimum-mean-squared-error (MMSE). The time-dispersion characteristics of the propagation channel were analyzed through the root-mean-squared (rms) delay-spread and the coherence bandwidth. The results reported here provide better knowledge of the propagation channel features and can be also used to design and evaluate the performance of the next fifth-generation (5G) networks in indoor office environments at the potential 26 GHz frequency band.This work was funded in part by the Spanish Ministerio de Economía, Industria y Competitividad under the research projects TEC2016-78028-C3-2-P, TEC2017-86779C1-2-R, and TEC2017-86779-C2-2-R, and by COLCIENCIAS in Colombia

A brassinosteroid functional analogue increases soybean drought resilience

Drought severely affects soybean productivity, challenging breeding/management strategies to increase crop resilience. Hormone-based biostimulants like brassinosteroids (BRs) modulate growth/defence trade-off, mitigating yield losses; yet, natural molecule's low stability challenges the development of cost-effective and long-lasting analogues. Here, we investigated for the first time the effects of BR functional analogue DI-31 in soybean physiology under drought by assessing changes in growth, photosynthesis, water relations, antioxidant metabolism, nodulation, and nitrogen homeostasis. Moreover, DI-31 application frequencies' effects on crop cycle and commercial cultivar yield stabilisation under drought were assessed. A single foliar application of DI-31 favoured plant drought tolerance, preventing reductions in canopy development and enhancing plant performance and water use since the early stages of stress. The analogue also increased the antioxidant response, favouring nitrogen homeostasis maintenance and attenuating the nodular senescence. Moreover, foliar applications of DI-31 every 21 days enhanced the absolute yield by ~ 9% and reduced drought-induced yield losses by ~ 7% in four commercial cultivars, increasing their drought tolerance efficiency by ~ 12%. These findings demonstrated the practical value of DI-31 as an environmentally friendly alternative for integrative soybean resilience management under drought.Instituto de Fisiología y Recursos Genéticos VegetalesFil: Perez Borroto, Lucia Sandra. Wageningen University and Research. Plant Breeding; Países BajosFil: Guzzo, María Carla. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; ArgentinaFil: Guzzo, María Carla. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA) ; ArgentinaFil: Posada, Gisella. Instituto Superior Albert Sabin; ArgentinaFil: Peña Malavera, Andrea Natalia. Estación Experimental Agroindustrial Obispo Colombres (EEAOC). Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Peña Malavera, Andrea Natalia. Consejo Nacional de Investigaciones Científicas Y Técnicas; ArgentinaFil: Castagnaro, Atilio Pedro. Estación Experimental Agroindustrial Obispo Colombres (EEAOC). Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Castagnaro, Atilio Pedro. Consejo Nacional de Investigaciones Científicas Y Técnicas; ArgentinaFil: Gonzalez Olmedo, Justo Lorenzo. Universidad de Ciego de Ávila “Máximo Gómez Báez”. Centro de Bioplantas; CubaFil: Coll García, Yamilet. Universidad de La Habana. Facultad de Química. Centro de Estudios de Productos Naturales; CubaFil: Pardo, Esteban Mariano. Estación Experimental Agroindustrial Obispo Colombres (EEAOC). Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Pardo, Esteban Mariano. Consejo Nacional de Investigaciones Científicas Y Técnicas; Argentin

Fading Evaluation in the 60GHz Band in Line-of-Sight Conditions

An exhaustive analysis of the small-scale fading amplitude in the 60GHz band is addressed for line-of-sight conditions (LOS). From a measurement campaign carried out in a laboratory, we have estimated the distribution of the small-scale fading amplitude over a bandwidth of 9GHz. From the measured data, we have estimated the parameters of the Rayleigh, Rice, Nakagami-m, Weibull, and \alpha-\mu distributions for the small-scale amplitudes. The test of Kolmogorov-Smirnov (K-S) for each frequency bin is used to evaluate the performance of such statistical distributions. Moreover, the distributions of the main estimated parameters for such distributions are calculated and approximated for lognormal statistics in some cases. The matching of the above distributions to the experimental distribution has also been analyzed for the lower tail of the cumulative distribution function (CDF).These parameters offer information about the narrowband channel behavior that is useful for a better knowledge of the propagation characteristics at 60GHz.This work was supported in part by the Spanish Ministerio de Ciencia e Innovacion TEC-2010-20841-C04-1 and by the Universitat Politecnica de Valencia, PAID 05-11 ref. 2702. The authors thank the anonymous reviewers for their valuable remarks and suggestions which have considerably enriched the final paper.Reig, J.; Martínez Inglés, M.; Rubio Arjona, L.; Rodrigo Peñarrocha, VM.; Molina-García-Pardo, J. (2014). Fading Evaluation in the 60GHz Band in Line-of-Sight Conditions. International Journal of Antennas and Propagation. 2014:1-12. https://doi.org/10.1155/2014/984102S1122014Smulders, P. (2002). 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Statistical Channel Models for 60 GHz Radio Propagation in Hospital Environments. IEEE Transactions on Antennas and Propagation, 60(3), 1569-1577. doi:10.1109/tap.2011.2180349Durgin, G. D., Rappaport, T. S., & de Wolf, D. A. (2002). New analytical models and probability density functions for fading in wireless communications. IEEE Transactions on Communications, 50(6), 1005-1015. doi:10.1109/tcomm.2002.1010620Yacoub, M. D. (2007). The κ-μ distribution and the η-μ distribution. IEEE Antennas and Propagation Magazine, 49(1), 68-81. doi:10.1109/map.2007.370983Martinez-Ingles, M.-T., Sanchis-Borras, C., Molina-Garcia-Pardo, J.-M., Rodriguez, J.-V., & Juan-Llacer, L. (2013). Experimental Evaluation of an Indoor MIMO-OFDM System at 60 GHz Based on the IEEE802.15.3c Standard. IEEE Antennas and Wireless Propagation Letters, 12, 1562-1565. doi:10.1109/lawp.2013.2293275Koay, C. G., & Basser, P. J. (2006). 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