Evolución y transformación de la dictadura cubana

When talking about the Cuban revolution, people usually think directly of characters such as Ernesto Guevara and Fidel Castro. However, the Cuban dictator Fulgencio Batista played a crucial role in the reality of the country by representing one of the most important references of the consequences of the concentration of power in Cuba before the arrival of Fidel Castro.Cuando se habla de la revolución cubana se suele pensar directamente en personajes como Ernesto Guevara y Fidel Castro. Sin embargo, el dictador cubano Fulgencio Batista desempeñó un papel crucial en la realidad del país al representar uno de los referentes más importantes de las consecuencias de la concentración de poder en Cuba antes de la llegada de Fidel Castro

Moving in the Dark-Evidence for an Influence of Artificial Light at Night on the Movement Behaviour of European Hedgehogs (Erinaceus europaeus).

Berger A, Lozano B, Barthel LMF, Schubert N. Moving in the Dark-Evidence for an Influence of Artificial Light at Night on the Movement Behaviour of European Hedgehogs (Erinaceus europaeus). Animals. 2020;10(8): 1306.With urban areas growing worldwide comes an increase in artificial light at night (ALAN), causing a significant impact on wildlife behaviour and its ecological relationships. The effects of ALAN on nocturnal and protected European hedgehogs (Erinaceus europaeus) are unknown but their identification is important for sustainable species conservation and management. In a pilot study, we investigated the influence of ALAN on the natural movement behaviour of 22 hedgehogs (nine females, 13 males) in urban environments. Over the course of four years, we equipped hedgehogs at three different study locations in Berlin with biologgers to record their behaviour for several weeks. We used Global Positioning System (GPS) tags to monitor their spatial behaviour, very high-frequency (VHF) loggers to locate their nests during daytime, and accelerometers to distinguish between active and passive behaviours. We compared the mean light intensity of the locations recorded when the hedgehogs were active with the mean light intensity of simulated locations randomly distributed in the individual's home range. We were able to show that the ALAN intensity of the hedgehogs' habitations was significantly lower compared to the simulated values, regardless of the animal's sex. This ALAN-related avoidance in the movement behaviour can be used for applied hedgehog conservation

Desenvolvimento e validação de uma escala para medir a atitude em relação ao aleitamento materno

Better knowledge of breastfeeding women for the design of strategies that promote exclusive breastfeeding will improve current rates. The use of tools to measure things such as attitude towards breastfeeding contributes to this purpose. The objective of the study was to develop and validate a scale that measures attitude towards breastfeeding.Un mejor conocimiento de las mujeres lactantes, para el diseño de estrategias que fomenten la lactancia materna exclusiva, permitirá mejorar las tasas actuales. El uso de instrumentos de medición en conceptos como la actitud frente a la lactancia permiten este propósito. El objetivo del estudio fue desarrollar y validar una escala que mida la actitud frente a la lactancia.Um melhor conhecimento das mulheres lactantes para o desenho de estratégias que promovam o aleitamento materno exclusivo irá melhorar os índices atuais. A utilização de instrumentos de medição em conceitos como a atitude em relação à amamentação permite este propósito. O objetivo do estudo foi desenvolver e validar uma escala para medir a atitude em relação ao aleitamento materno

Aloe Vera extract-based composite nanofibers for wound dressing applications

Natural, biocompatible, and biodegradable composite nanofibers made of Aloe vera extract, pullulan, chitosan, and citric acid were successfully produced via Forcespinning® technology. The addition of Aloe vera extract at different weight percent loadings was investigated. The morphology, thermal properties, physical properties, and water absorption of the nanofibers were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The developed nanofiber membranes exhibited good water absorption capabilities, synergistic antibacterial activity against Escherichia coli, and promoted cell attachment and growth. Its porous and high surface area structure make it a potential candidate for wound dressing applications due to its ability to absorb excessive blood and exudates, as well as provide protection from infection while maintaining good thermal stability

Actividades para contribuir al cuidado y protección del medio ambiente en las primeras edades.

El presente trabajo aborda la situación problémica que se refleja en el insuficiente cuidado y protección del medio ambiente de los escolares en las primeras edades, teniendo en cuenta que en este período transitan por la enseñanza primaria. Propone un sistema de actividades para contribuir a la Educación Ambiental de los niños de 2do grado. Se utilizaron métodos teóricos y empíricos, como un experimento, el cual se aplicó a los 24 estudiantes de 2do grado de la escuela primaria Máximo Gómez del municipio Santa Clara. Uno de los resultados más relevantes es que se logró la total implicación de los docentes en el experimento, obteniendo resultados satisfactorios en la conducta de cada alumno una vez culminada la aplicación

Functionalized Thermoplastic Polyurethane Nanofibers: An Innovative Triboelectric Energy Generator

A triboelectric nanogenerator (TENG) is one of the most significantly innovative microdevices for built-in energy harvesting with wearable and portable electronics. In this study, the forcespinning technology was used to synthesize a nanofiber (NF) mat-based TENG. Polyvinylidene fluoride (PVDF) membrane was used as the negative triboelectric electrode/pole, and chemically designed and functionalized thermoplastic polyurethane (TPU) was used as the positive electrode/pole for the TENG. The electronic interference, sensitivity, and gate voltage of the synthesized microdevices were investigated using chemically modified bridging of multi-walled carbon nanotubes (MWCNT) with a TPU polymer repeating unit and bare TPU-based positive electrodes. The chemical functionality of TPU NF was integrated during the NF preparation step. The morphological features and the chemical structure of the nanofibers were characterized using a field emission scanning electron microscope and Fourier-transform infrared spectroscopy. The electrical output of the fabricated MWCNT-TPU/PVDF TENG yielded a maximum of 212 V in open circuit and 70 µA in short circuit at 240 beats per minute, which proved to be 79% and 15% higher than the TPU/PDVF triboelectric nanogenerator with an electronic contact area of 3.8 × 3.8 cm2, which indicates that MWCNT enhanced the electron transportation facility, which results in significantly enhanced performance of the TENG. This device was further tested for its charging capacity and sensory performance by taking data from different body parts, e.g., the chest, arms, feet, hands, etc. These results show an impending prospect and versatility of the chemically functionalized materials for next-generation applications in sensing and everyday energy harvesting technology

Mejora del control de inventarios y su incidencia en la rentabilidad de la empresa Rodiscar Autoboutique Multiservicios S. A. C Trujillo año 2021

En el presente trabajo de suficiencia profesional relacionada a la mejora del control de inventarios y de la manera como esta incide en la rentabilidad. Normalmente se requiere de determinados procesos administrativos en el manejo de los inventarios desde que los productos son ingresados hasta su distribución, asegurando en todo momento la buena atención a los clientes y que de esta manera aseguren el crecimiento de la empresa Rodiscar Autoboutique Multiservicios SAC. La compañía en los últimos años sus controles de los inventarios han sido dejado de lado por su inoperatividad, por lo que es necesario realizar una mejora al control de inventarios. En nuestro trabajo de investigación aplicamos el cuestionario en la que se determinó cual es la situación actual de la empresa en relación a los inventarios, basados en la no existencia de un control de ingresos salidas, custodia y la determinación de saldos para su atención en su oportunidad, teniendo a la fecha sus indicadores de productos malogrados y desaparecidos sin ser detectados, por lo que es necesario establecer mejoras en el control de los inventarios

EVALUACIÓN COMPUTARIZADA DE PRUEBAS PSICOLÓGICAS MEDIANTE EL PROCESAMIENTO DIGITAL DE IMÁGENES

Este trabajo presenta un algoritmo desarrollado en MATLAB® para la evaluación computarizadade pruebas psicológicas realizadas con la técnica de lápiz-papel de opción múltiple. Con la utilización adecuada de las herramientas actuales para el procesamiento digital de imágenes y reconocimiento de patrones, es posible la evaluación automática de cualquier prueba psicológica realizada con la técnica de lápiz-papel utilizando una computadora personal convencional. En este caso, para demostrar el potencial del algoritmo, fue adaptado para la escala básica del Inventario Multifásico de la Personalidad de Minnesota para individuos masculinos. Los resultados obtenidos demuestran 99.5% de exactitud y la obtención de la gráfica del perfil en 40 segundos. Con el formato digitalizado de la hoja de respuestas, el algoritmo realiza el acondicionamiento de la imagen, la detección y clasificación de los ítems y la contabilidad de las respuestas; finalmente, brinda la gráfica del perfil del individuo

Design and Validation of a Portable Handheld Device to Produce Fine Fibers Using Centrifugal Forces

In the present research project, a novel portable battery-powered handheld device able to produce micron and submicron fibers using centrifugal forces is proposed. The design includes spinnerets with a clamshell configuration with multiple chambers or reservoirs (2, 4, and 8) and different exit orifice diameters (400, 500, 600, and 800 µm). The rotational speed is controlled via an Arduino microcontroller. To validate the design, a series of experiments were conducted and the effect of the orifice diameter, number of chambers, and velocity on the resulting fibers’ diameter and yield was studied. For the experiments, a polymeric solution of Polyvinyl Alcohol (PVA) was prepared. The fiber yield was gravimetrically quantified, and the fiber morphology and diameter were analyzed by means of scanning electron microscopy (SEM). The experimental results showed that spinnerets with an orifice diameter of 500 microns yielded the greatest amount of fibers (0.0777 g). In addition, the number of chambers also affected the amount of fibers produced, and it was determined that the fiber diameter size is dependent on the spinneret speed. Fibers 80 nm in diameter were observed at 6500 rpm

Influence of Mediterranean Diet Adherence and Physical Activity on Bone Health in Celiac Children on a Gluten-Free Diet

We aimed to assess the influence of the Mediterranean Diet adherence and physical activity (PA) on body composition, with a particular focus on bone health, in young patients with celiac disease (CD). The CD group (n = 59) included children with CD with a long (>18 months, n = 41) or recent (<18 months, n = 18) adherence to a gluten-free diet (GFD). The non-celiac group (n = 40) included non-celiac children. After adjusting for potential confounders, the CD group showed lower body weight (p = 0.034), lean mass (p = 0.003), bone mineral content (p = 0.006), and bone Z-score (p = 0.036) than non-celiac children, even when the model was further adjusted for adherence to a GFD for at least 18 months. Among CD children, spending greater time in vigorous physical activity was associated with higher lean mass (p = 0.020) and bone mineral density with evidence of statistical significance (p = 0.078) regardless of the time they followed a GFD. In addition, a greater Mediterranean Diet adherence was associated with a higher bone Z-score (p = 0.020). Moreover, lean mass was strongly associated with bone mineral density and independently explained 12% of its variability (p < 0.001). These findings suggest the importance of correctly monitoring lifestyle in children with CD regarding dietary habits and PA levels to improve lean mass and, consequently, bone quality in this population.Regional Government of Andalusia, Excellence Research Project No P12-AGR-2581Project from the University of Granada Ref. PP2017-PIP14Spanish Ministry of Education, Culture, and Sports (Grant number FPU17/03715