Bilateral Asymmetries Assessment in Elite and Sub-Elite Male Futsal Players

This study aimed to investigate morphological, functional, and neuromuscular asymmetries on futsal players’ lower limbs at different competitive levels. Sixteen male elite futsal players from the Spanish National Futsal League and thirteen male sub-elite futsal players from the third division participated in this study. Morphological asymmetry was assessed through bioelectrical impedance (fat-mass (g and %) and lean-mass (g)). Functional asymmetry was assessed by means of a 20-s static unipedal balance test. Finally, neuromuscular asymmetry was assessed using tensiomiography tests on both the rectus femoris (RF) and biceps femoris (BF) of each participant. The three tests conducted did not reveal significant bilateral asymmetries in elite players. On the other hand, sub-elite players showed significant bilateral asymmetry in fat-mass percentage between dominant and non-dominant limbs (+6%; CI95%: 1 to 11; ES: 0.88; p = 0.019). They also showed higher bilateral asymmetry in the delay time of the RF (+13%; CI95%: 7 to 21; ES: 1.3; p 0.05) did not evidence asymmetries regardless of the level of the participants. Elite futsal players do not develop bilateral asymmetries in lower limbs in the studied parameters. On the contrary, sub-elite players are likely to develop morphological and neuromuscular asymmetries between their dominant leg and non-dominant leg.Sin financiación3.390 JCR (2020) Q1, 42/176 Public, Environmental & Occupational Health0.747 SJR (2020) Q2, 50/136 Health, Toxicology and MutagenesisNo data IDR 2020UE

Formulación matemática de algunos modelos físicos utilizados en la reconstrucción de un evento de tránsito y las consideraciones para su implementación

Los procedimientos analíticos empleados para inferir magnitudes físicas en los eventos de tránsito (modelos físicos), son siempre construcciones teóricas que permiten abordar el problema. Estos modelos pueden ser mejorados al considerar variables que antes fueron descartadas, teniendo especial cuidado en los límites de aplicabilidad para poder interpretar correctamente los resultados obtenidos.The analytic procedure used to infer physical cuantitires in traffic events (physical models), are theoretical basis that allows solving the problem. This models can be improved using previous discarded variables, taking special care of aplicatibility bounds in order to achieve best result interpretation

La melatonina y su papel en la enfermedad de Alzheimer

La melatonina es una indolamina conocida principalmente por su función de sincronización del ritmo circadiano, pero que posee otras acciones esenciales, como la antioxidante y la anti-inflamatoria, que le confieren un gran potencial en el tratamiento y prevención de numerosas enfermedades, y en especial las enfermedades neurodegenerativas, entre las que destaca la enfermedad de Alzheimer. Esta patología es la principal causa de demencia en las personas de avanzada edad, entre las cuales es altamente prevalente, y que actualmente no tiene ningún tratamiento que modifique la evolución natural de la enfermedad. Existen varias hipótesis que intntan explicar su etiopatogenia, como la acumulación del péptido β-amiloide, la destrucción de neuronas colinérgicas, el papel del calcio en la excitotoxicidad y la cascada mitocondrial, y en la mayor parte de ellas existe una participación importante de la neuroinflamación y del estrés oxidativo. En esta revisión nos centramos en el papel potencial de la melatonina en estos mecanismos etiopatogénicos, pudiendo así ser un aliado terapéutico eficiente, retrasando la progresión de la enfermedad de Alzheimer.<br /

Physical and Physiological Responses of U-14, U-16, and U-18 Soccer Players on Different Small-Sided Games

As most existing studies in youth academies are focused on top players, the objective of this research is to analyze the physical and physiological demands of various small-sided games (SSGs) on different age categories within a sub-elite soccer academy. We evaluated 63 young players from a Spanish sub-elite academy (under 14 = 21; under 16 = 21; under 18 = 21). Players performed four different small-side games focused on possession game (3-a-side; 4-a-side; 5-a-side; 6-a-side). The global indicators of performance and high-intensity actions were recorded through global positioning systems, whereas the heart rate responses were measured using heart rate monitors. Results: Under 16 ran a greater distance at high-intensity velocity than under 14 in the small side games 3v3 and 6v6. Furthermore, under 16 also ran a greater distance at high-intensity velocity than under 18 in the small side game 3v3 (p 2.75 m/s2) than the other age groups, under 16 and U18 (p 1). According to the physiological load, SSG 3v3 presented lower outcomes in Zone 6 (> 95% HRmax) than the small side game 4v4 and the small side game 5v5, in both under 14 and under 16. The workload of SSGs varies depending on the number of players, but also depending on the players’ ages. Therefore, when designing the SSGs it is important to consider both the players’ ages and the workload that want to be achieved.Sin financiaciónNo data 2020UE

Modeling of the pyrolysis of biomass under parabolic and exponential temperature increases using the Distributed Activation Energy Model

A modification of the simplified Distributed Activation Energy Model is proposed to simulate the pyrolysis of biomass under parabolic and exponential temperature increases. The pyrolysis of pine wood, olive kernel, thistle flower and corncob was experimentally studied in a TGA Q500 thermogravimetric analyzer. The results of the measurements of nine different parabolic and, exponential temperature increases for each sample were employed to validate the models proposed. The deviation between the experimental TGA measurements and the estimation of the reacted fraction during the pyrolysis of the four samples under parabolic and exponential temperature increases was lower than 5 degrees C for all the cases studied. The models derived in this work to describe the pyrolysis of biomass with parabolic and exponential temperature increases were found to be in good agreement with the experiments conducted in a thermogravimetric analyzer.The authors express their gratitude to the BIOLAB experimental facility and to the "Programa de movilidad de investigadores en centros de investigación extranjeros (Modalidad A)" from the Carlos III University of Madrid (Spain) for the financial support conceded to Antonio Soria for a research stay at the German Aerospace Center DLR (Stuttgart, Germany) during the summer of 2014. The authors also gratefully acknowledge the financial support provided by Fundación Iberdrola under the "VI Programa de Ayudas a la Investigación en Energía y Medioambiente". Funding by the combustion and gas turbine technology program (EVG), of Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR), the German Aerospace Center, is gratefully acknowledged by Elke Goos

Post-CMOS compatible high-throughput fabrication of AIN-based piezoelectric microcantilevers

A post-complementary metal oxide semiconductor (CMOS) compatible microfabrication process of piezoelectric cantilevers has been developed. The fabrication process is suitable for standard silicon technology and provides low-cost and high-throughput manufacturing. This work reports design, fabrication and characterization of piezoelectric cantilevers based on aluminum nitride (AlN) thin films synthesized at room temperature. The proposed microcantilever system is a sandwich structure composed of chromium (Cr) electrodes and a sputtered AlN film. The key issue for cantilever fabrication is the growth at room temperature of the AlN layer by reactive sputtering, making possible the innovative compatibility of piezoelectric MEMS devices with CMOS circuits already processed. AlN and Cr have been etched by inductively coupled plasma (ICP) dry etching using a BCl3–Cl2–Ar plasma chemistry. As part of the novelty of the post-CMOS micromachining process presented here, a silicon Si (1 0 0) wafer has been used as substrate as well as the sacrificial layer used to release the microcantilevers. In order to achieve this, the Si surface underneath the structure has been wet etched using an HNA (hydrofluoric acid + nitric acid + acetic acid) based solution. X-ray diffraction (XRD) characterization indicated the high crystalline quality of the AlN film. An atomic force microscope (AFM) has been used to determine the Cr electrode surface roughness. The morphology of the fabricated devices has been studied by scanning electron microscope (SEM). The cantilevers have been piezoelectrically actuated and their out-of-plane vibration modes were detected by vibrometry

Diseño e implementación de una aplicación web para la digitalización de las historias clínicas del Centro de Servicios y Cuidado Integral de la Salud en la Universidad Libre Seccional Pereira

CD-T 005.12 H65; 171 pEl proyecto plantea una solución eficiente a la necesidad de implementar una aplicación web para la plataforma de la Universidad Libre Seccional Pereira, que le permita al Centro de Servicios y Cuidado Integral de la Salud, sistematizar las historias clínicas de sus pacientes y de esta forma administrarlas haciendo uso de todas las ventajas tecnológicas mencionadas anteriormente.Universidad Libre Seccional Pereir

Extracción de características de textura para cotejo de proyectiles en balística.

Debido al contacto entre el interior del cañón y el proyectil al disparar un arma de fuego, quedan impresas marcas sobre la superficie del proyectil. Estas marcas son características de cada tipo de arma y más allá pueden ser interpretadas como su “huella digital”. Un reconocimiento de las características que presentan estas marcas conduciría a identificar cada arma de manera tan efectiva como las huellas digitales permiten identificar los sujetos. Se presenta en este trabajo, un conjunto de características de diferente naturaleza, las cuales resultan útiles en la descripción de la textura que se presenta en las imágenes de las superficies de proyectiles disparados por armas de fuego