Evaluación del nivel de funcionalidad de los portales electrónicos caso: Estado de México y Distrito Federal periodo 2012-2014

El presente documento tiene como finalidad explorar y comparar la funcionalidad de las páginas oficiales tanto del Distrito Federal como del Estado de México, ya que, actualmente, ambos servirán como un referente en medición de la Administración Electrónica, y del desarrollo de la misma en el gobierno. Los sitios web a través de la administración electrónica son un medio por el cual es posible obtener y aprovechar la tecnología disponible y, de esta forma, incrementar la eficiencia de la Administración, así como disminuir costos y mejorar la calidad del servicio público

Estudio y Conservación del Patrimonio Cultural - Actas

Libro de Actas publicado por la organización del Congreso Nacional: Estudio y Conservación del Patrimonio Cultural - 2015Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Aportaciones a la flora del sureste ibérico

New records to the flora of SE Spain.Palabras clave: Corología, plantas vasculares, Murcia, Albacete, España.Key words: Chorology, vascular plants, Murcia, Albacete, Spain

"Security Model for a Central Bank in Latin America using Blockchain"

"Banking institutions in Latin America are the target of increasingly sophisticated and advanced cyber-attacks and threats, which increase every year and leave substantial economic losses, due to the high level of global interconnection and digitization of their operations. The objective of this work is to design a model to guarantee information security in a Central Bank in Latin America using Blockchain technology. Exploratory research, observation and inductive and deductive methods are used to propose Blockchain solutions in a Central Bank. The results are a model for secure transactions in Blockchain, Smart Contract functions and a data management process. It was concluded that the security model for a central bank provides high level of information management and storage of transactions in a secure and immutable way.

Films Based on Thermoplastic Starch Blended with Pine Resin Derivatives for Food Packaging

[EN] Completely biobased and biodegradable thermoplastic starch (TPS) based materials with a tunable performance were prepared for food packaging applications. Five blends were prepared by blending TPS with 10 wt%. of different pine resins derivatives: gum rosin (GR), disproportionated gum rosin (RD), maleic anhydride-modified gum rosin (CM), pentaerythritol ester of gum rosin (LF), and glycerol ester of gum rosin (UG). The materials were characterized in terms of thermo-mechanical behavior, surface wettability, color performance, water absorption, X-ray diffraction pattern, and disintegration under composting conditions. It was determined that pine resin derivatives increase the hydrophobicity of TPS and also increase the elastic component of TPS which stiffen the TPS structure. The water uptake study revealed that GR and LF were able to decrease the water absorption of TPS, while the rest of the resins kept the water uptake ability. X-ray diffraction analyses revealed that GR, CM, and RD restrain the aging of TPS after 24 months of aging. Finally, all TPS-resin blends were disintegrated under composting conditions during the thermophilic incubation period (90 days). Because of the TPS-resin blend's performance, the prepared materials are suitable for biodegradable rigid food packaging applications.This research was funded by MINECO, with the project: PROMADEPCOL: MAT2017-84909-C2-2-R.Pavón-Vargas, CP.; Aldás-Carrasco, MF.; López-Martínez, J.; Hernández-Fernández, J.; Arrieta, MP. (2021). Films Based on Thermoplastic Starch Blended with Pine Resin Derivatives for Food Packaging. Foods. 10(6):1-16. https://doi.org/10.3390/foods10061171S11610

Biomechanical assessment of aerodynamic resistance in proffessional cyclists: methodological aspects

El objetivo de este estudio fue medir y comparar, a través de un túnel de viento, la resistencia aerodinámica (RA) en cinco ciclistas profesionales; y establecer modificaciones que mejoraran el rendimiento. Cinco ciclistas profesionales del equipo Kelme-Costa Blanca fueron objeto de estudio, cuatro en bicicleta aerodinámica y uno en bicicleta estándar. De nuestros resultados concluimos que estableciendo pequeñas modificaciones en los manillares, colocándolos en una posición más rentable, se puede reducir la R

Quantitative Evaluation of Supported Catalysts Key Properties from Electron Tomography Studies: Assessing Accuracy Using Material-Realistic 3D-Models

Electron Tomography (ET) reconstructions can be analysed, via segmentation techniques, to obtain quantitative, 3D-information about individual nanoparticles in supported catalysts. This includes values of parameters out of reach for any other technique, like their volume and surface, which are required to determine the dispersion of the supported particle system or the specific surface area of the support; two figures that play a major role in the performance of this type of catalysts. However, both the experimental conditions during the acquisition of the tilt series and the limited fidelity of the reconstruction and segmentation algorithms, restrict the quality of the ET results and introduce an undefined amount of error both in the qualitative features of the reconstructions and in all the quantitative parameters measured from them. Here, a method based on the use of well-defined 3D geometrical models (phantoms), with morphological features closely resembling those observed in experimental images of an Au/CeO2 catalyst, has been devised to provide a precise estimation of the accuracy of the reconstructions. Using this approach, the influence of noise and the number of projections on the errors of reconstructions obtained using a Total Variation Minimization in 3D (TVM-3D) algorithm have been determined. Likewise, the benefits of using smart denoising techniques based on Undecimated Wavelet Transforms (UWT) have been also evaluated. The results clearly reveal a large impact of usual noise levels on both the quality of the reconstructions and nanometrological measurement errors. Quantitative clues about the key role of UWT to largely compensate them are also provided.This work has received support from Projects: PID2020-113006-RB-I00, PID2019-110018GA-I00, PID2020-114594GB-C22, funded by MCIN/AEI/https://doi.org/10.13039/501100011033.This work has also been co-financed by Project ref: MAT2017-87579-R and by the 2014 -2020 ERDF Operational Programme and by the Department of Economy, Knowledge, Business and University of the Regional Government of Andalusia, Project references: FEDER-UCA18-107139, FEDERUCA18-106895 and P18-FR-1422. STEM ET experiments were recorded at the DME-UCA Node of the Spanish Singular Infrastructure for Electron Microscopy of Materials (ICTS ELECMI)

DIGITAL DIVIDE IN PERUVIAN HIGHER EDUCATION: A POST-PANDEMIC REVIEW

By early 2020, the COVID-19 pandemic paralyzed the world, with the origin being the Chinese city of Wuhan. By March 11, 2020, the World Health Organization (WHO) declared COVID-19 a pandemic.  The dire consequences of this disease were reflected in a historic global recession, and in the health field, SARS-CoV-2 had wreaked havoc, especially in the elderly, due to worse manifestations and higher mortality rates. As a result, most countries were able to curb the spread of the virus by imposing mandatory measures such as not leaving their homes and very strict timetables. Among the measures considered was the closure of educational institutions, including universities. At that time, there was a paradigm shift in the way educators had to change the way they taught classes by making use of various online platforms. Online, distance and continuing education learning became a panacea for this unprecedented global pandemic for both educators and students. In this review, a passage is made through the different scenarios experienced by the COVID-19 pandemic, taking into account several objectives such as: the COVID-19, and the case of universities, the educational transition: from face-to-face to virtuality, challenges and opportunities after the pandemic, and last but not least, how the Peruvian State, was able to cope with the pandemic of Covid-19, and the challenges that should continue to be considered after the pandemic

One-pot synthesis of ZnO–Ag and ZnO–Co nanohybrid materials for photocatalytic applications

ZnO–Ag and ZnO–Co nanohybrid materials with different Ag and Co contents were successfully prepared through a simple one-pot method at room temperature in the absence of surfactants. This synthesis route is effective and environmentally friendly and can produce spherical nanoparticles with sizes between 7 and 20 nm. The nanohybrid materials were characterized by UV–vis spectroscopy, fluorescence spectroscopy, scanning electron microscopy–energy-dispersive X-ray analysis, X-ray diffraction, Fourier transform IR spectroscopy, and high-resolution transmission electron microscopy. Their photocatalytic activity was evidenced by discoloration of the synthetic diazo dye Bismarck brown Y; ZnO–Ag nanohybrid materials had greater efficiency for decolorization of the dye compared with ZnO–Co, ZnO, and TiO2. The enhanced photocatalytic activity of the ZnO–Ag nanohybrid material is due to three important aspects: (1) the oxygen vacancies present on the ZnO surface, (2) the efficient absorption of visible light due to the interaction of the semiconductor and the surface plasmon resonance of Ag, and (3) the effective separation of charges due to the formation of the Schottky barrier between ZnO and Ag, where Ag acts as an electron trap, and thereby reduces recombination. When the ZnO–Co nanohybrid is used, the addition of Co introduces intermediate energy levels between the valence and conduction bands on the semiconductor surface, which results in a recombination that reduces the photocatalytic activity, making the azo dye decolorization less efficient