The role of heart rate on the associations between body composition and heart rate variability in children with overweight/obesity : the ActiveBrains project

Background: Heart rate variability (HRV) is negatively associated with body mass index and adiposity in several populations. However, less information is available about this association in children with overweight and obesity, especially severe/morbid obesity, taking into consideration the dependence of HRV on heart rate (HR). Objectives: (1) to examine associations between body composition measures and HRV, (2) to study differences in HRV between children with overweight and severe/morbid obesity; and (3) to test whether relationships and differences tested in objectives 1 and 2, respectively are explained by the dependency of HRV on HR. Methods: A total of 107 children with overweight/obesity (58% boys, 10.03 +/- 1.13 years) participated in this study. Body composition measures were evaluated by Dual-energy X-ray absorptiometry (DXA). HRV parameters were measured with Polar RS800CXR (R). Results: Body composition measures were negatively associated with HRV indicators of parasympathetic activity (beta values ranging from -0.207 to -0.307, all p 0.05). Conclusion: All associations between adiposity/obesity and HRV could be explained by HR, suggesting a key confounding role of HR in HRV studies in children with weight disturbances

ANÁLISIS OPERATIVO DE UN GASIFICADOR DOWNDRAFT DE RESIDUO MADERABLE

La gasificación es un proceso de oxidación de la biomasa a través de un proceso termoquímico el cual la descompone en un gasde síntesis (SYNGAS), este tienes unas propiedades térmicas que permiten su utilización como fuente de energía, específicamente su versatilidad da la opción de inyección a un motor de combustión para generación de energía eléctrica. El alcance del estudio está limitado a la operación de un gasificador downdraft de 30 kW con capacidad volumétrica de 0.5 3 aprovechando residuos maderables, el objetivo está orientado a identificar el punto óptimo de operación bajo la caracterización y correlación de variables (velocidad de entrada de aire y temperatura combustión en el reactor). En términos generales se busca identificar el punto óptimo de operación para definir protocolos operativos del gasificador pensando en el escalamiento de la tecnología al sector aserradero de la provincia del sugamuxi. De igual manera se analiza indicadores termoeconómicos que soportan la tecnología como alternativa energética para aplicación en procesos productivos

Beyond Certificates: 6G-ready Access Control for the Service-Based Architecture with Decentralized Identifiers and Verifiable Credentials

In 6G, mobile networks are poised to transition from monolithic structures owned and operated by single mobile network operators into multi-stakeholder networks where various parties contribute with infrastructure, resources, and services. This shift brings forth a critical challenge: Ensuring secure and trustful cross-domain access control. This paper introduces a novel technical concept and a prototype, outlining and implementing a 5G Service-based Architecture that utilizes Decentralized Identifiers and Verifiable Credentials to authenticate and authorize network functions among each other rather than relying on traditional X.509 certificates or OAuth2.0 access tokens. This decentralized approach to identity and permission management for network functions in 6G reduces the risk of a single point of failure associated with centralized public key infrastructures, unifies access control mechanisms, and paves the way for lesser complex and more trustful cross-domain key management for highly collaborative network functions of a future Service-based Architecture in 6G.Comment: This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessibl

El uso productivo del tiempo libre extraescolar en los niños de 6 a 15 años de la urbanización Villa del Mar en la ciudad de Santa Marta

La Urbanización Villa del Mar de la ciudad de Santa Marta, desde su creación ha carecido de escenarios deportivos y recreativos donde los niños puedan desarrollarse integralmente. Siendo esta una necesidad para jóvenes y niños, algunos padres muestran preocupación e interés para remediar este problema. Además, para llevar a las familias a reflexionar más seriamente sobre la importancia del buen uso del tiempo en el desarrollo social e integral de los niños de la comunidad, que se traduce en optimizar un potencial para lograr mejores condiciones. para el desarrollo del mismo. La mayor repercusión social será lograr que los padres y familiares en general reconozcan el valor del tiempo libre como estrategia prioritaria para garantizar un buen desarrollo integral del niño y la familia. Las familias destinan la mayor parte de los ingresos a la manutención alimentaria, vestido, educación, pero para actividades de integración y recreación familiar es muy poco o casi nada los ingresos que se destinan. Esto indica que la calidad de la interacción va en proporción directa a los ingresos

The diversity of sulfide oxidation and sulfate reduction genes expressed by the bacterial communities of the Cariaco Basin, Venezuela

© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Open Microbiology Journal 10 (2016): 140-149, doi:10.2174/1874285801610010140.Qualitative expression of dissimilative sulfite reductase (dsrA), a key gene in sulfate reduction, and sulfide:quinone oxidoreductase (sqr), a key gene in sulfide oxidation was investigated. Neither of the two could be amplified from mRNA retrieved with Niskin bottles but were amplified from mRNA retrieved by the Deep SID. The sqr and sqr-like genes retrieved from the Cariaco Basin were related to the sqr genes from a Bradyrhizobium sp., Methylomicrobium alcaliphilum, Sulfurovum sp. NBC37-1, Sulfurimonas autotrophica, Thiorhodospira sibirica and Chlorobium tepidum. The dsrA gene sequences obtained from the redoxcline of the Cariaco Basin belonged to chemoorganotrophic and chemoautotrophic sulfate and sulfur reducers belonging to the class Deltaproteobacteria (phylum Proteobacteria) and the order Clostridiales (phylum Firmicutes).Support for this work came from NSF grant MCB03-47811 to AYC, MIS, and GTT and NSF grant OCE-1061774 to VPE and CT