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Feasibility of performing the 3-minute step test with remote supervision in children and adolescents with cystic fibrosis: A comparative study

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Pediatric Investigation 2024年第2期8卷 83-90页

作者： Fernanda maria Vendrusculo Gisele Apolinario da Costa maria Amelia Bagatini Brenda maria Henrique maia Lemes Carolina Aguiar Faria Larissa Carvalhaes de Oliveira Evanirso da Silva Aquino marcio Vinicius Fagundes Donadio Laboratory of Pediatric Physical Activity Infant CenterPontificia Universidade Catolica do Rio Grande do Sul(PUCRS)Porto AlegreBrazil Hospital Infantil Joao Paulo II-Fundacao Hospitalar do Estado de minas Gerais(FHEmIG) Belo HorizonteBrazil Departament of Physiotherapy Pontificia Universidade Catolica de Minas Gerais(PUCMG)-Campus BetimBetimBrazil Department of Physiotherapy Faculty of Medicine and Health SciencesUniversitat Internacional de Catalunya(UIC)BarcelonaSpain

Importance:The 3-min step test is a simple option to monitor submaximal exercise capacity,although its use via remote video monitoring has not been investigated in children with cystic fibrosis(CF).Objective:This study aimed to assess the feasibility and reproducibility of performing the 3-min step test with remote ***:A cross-sectional study including CF patients(6-18 years)from two CF services were ***,anthropometric,clinical,and lung function data were collected and two 3-min step tests were performed:(i)in-person supervision,and(ii)remotely supervised by video *** and after the tests,heart rate(HR),oxygen saturation(SpO2),and the Borg score for dyspnea and lower limb fatigue were ***:Twenty-three patients(10.7±3.7 years)with a mean FEV1 of 89.5%±23.2%were *** were no significant differences between tests,with mean differences(95%confidence intervals)in final HR of-3.3(-8.9,2.4),change in HR of-1.9(-6.1,2.1),final SpO2 of 0.3(-0.4,1.0),and final dyspnea of 0.1(-0.8,0.9).The intraclass correlation coefficient was 0.852(final HR),0.762(final SpO2),and 0.775(final lower limb fatigue).Significant and moderate correlations were found between tests for final HR(r=0.75),change in HR(r=0.61),and final SpO2(r=0.61).The Bland-Altman analysis showed a mean difference in final SpO2 between tests of 0.3%(limit of agreement-3.0%,3.5%).Interpretation:Physiological responses between tests were similar,indicating it was feasible to perform the 3-min step test with remote supervision in CF children.

关键词： Children Cystic fibrosis Exercise test Telehealth

Experimental verification of ill-defined topologies and energy sinks in electromagnetic continua

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Advanced Photonics 2022年第3期4卷 97-104页

作者： David E.Fernandes Ricardo A.m.Pereira Sylvain Lannebère Tiago A.morgado m.rio G.Silveirinha University of Coimbra Instituto de Telecomunicações and Department of Electrical EngineeringCoimbraPortugal University of Aveiro Instituto de TelecomunicaçõesDepartment of ElectronicsTelecommunications and InformaticsAveiroPortugal University of Lisbon Instituto Superior Técnico and Instituto de TelecomunicaçõesDepartment of Electrical EngineeringLisboaPortugal

.It is experimentally verified that nonreciprocal photonic systems with continuous translation symmetry may have an ill-defined *** topological classification of such systems is only feasible when the material response is regularized with a spatial-frequency *** experimentally demonstrate that adjoining a small air layer to the relevant material interface may effectively imitate an idealized spatial cutoff that suppresses the nonreciprocal response for short wavelengths and regularizes the ***,it is experimentally verified that nonreciprocal systems with an ill-defined topology may be used to abruptly halt the energy flow in a unidirectional waveguide due to the violation of the bulk-edge *** particular,we report the formation of an energy sink that absorbs the incoming electromagnetic waves with a large field enhancement at the singularity.

关键词： topological photonics nonreciprocity topological singularities bulk edge correspondence.

Performance of evolutionary optimized machine learning for modeling total organic carbon in core samples of shale gas fields

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Petroleum 2024年第1期10卷 150-164页

作者： Leonardo Goliatt C.m.Saporetti L.C.Oliveira E.Pereira Department of Computational and Applied mechanics Federal University of Juiz de Fora Department of Computational modeling Polytechnic Institute Rio de Janeiro State University Petrobras Department of Stratigraphy and Paleontology Rio de Janeiro State University

Rock samples' TOC content is the best indicator of the organic matter in source rocks. The origin rock samples' analysis is used to calculate it manually by specialists. This method requires time and resources because it relies on samples from many well intervals in source rocks. Therefore, research has been done to aid this effort. machine learning algorithms can estimate total organic carbon instead of well logs and stratigraphic studies. In light of these efforts, the current work present a study on automating the total organic carbon estimation using machine learning approaches improved by an evolutionary methodology to give the model flexibility and precision. Genetic algorithms, differential evolution, particle swarm optimization, grey wolf optimization, artificial bee colony, and evolution strategies were used to improve machine learning models to predict TOC. The six metaheuristics were integrated into four machine learning methods: extreme learning machine, elastic net linear model, linear support vector regression, and multivariate adaptive regression splines. Core samples from the YuDong-Nan shale gas field, located in the Sichuan basin, were used to evaluate the hybrid strategy. The findings show that combining machine learning models with an evolutionary algorithms in a hybrid fashion produce flexible models that accurately predict TOC. The results show that, independent of the metaheuristic used to guide the model selection, optimized extreme learning machines attained the best performance scores according to six metrics. Such hybrid models can be used in exploratory geological research,particularly for unconventional oil and gas resources.

关键词： Total organic carbon Hybrid models Automated machine learning Evolutionary algorithms Geology

^(222)Rn calibration procedure for water analyses by liquid scintillation counting

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辐射探测技术与方法(英文) 2023年第2期7卷 311-319页

作者： Ana Rita Gomes Sérgio Dias Anabela mourato Joao Abrantes m.rio Reis Laboratório de Protecao e Seguranca Radiológica Instituto Superior TécnicoUniversidade de LisboaEstrada Nacional 10km 13972695‑066 Bobadela LRSPortugal Laboratórios de massa e massa Volúmica de Sólidos Instituto Portugues da QualidadeRua António Giao22829‑513 CaparicaPortugal Centro de Ciências e Tecnologias Nucleares Instituto Superior TécnicoUniversidade de LisboaEstrada Nacional 10km 13972695‑066 Bobadela LRSPortugal

Purpose Among the several methods to measure ^(222)Rn in water,the liquid scintillation counting(LSC)technique is one of the most sensitive and widely used when analysing non-saline waters by liquid extraction,providing excellent accuracy,precision and low-level detection *** using the liquid scintillation counter Tri-Carb 3170 TR/SL(Perkin-Elmer)it is not possible to make an automatic determination of the alpha/beta discrimination parameter,being necessary to evaluate the pulse decay discriminator(PDD)value manually to the ^(222)Rn *** this work,we describe the steps to perform the calibration of that type of *** The method consists in the preparation of standard samples from a ^(226)Ra certified standard solution and the adjustment of the PDD value by hand until the percentage of alpha events reaches a plateau of a near-constant fraction of total *** process consists in taking several measures between PDD 80 and 200 with 15 min counting time *** the plateau,the alpha/beta ratio was used to determine the plateau final range as well as the optimum PDD *** that,the calibration standards and blanks were measured and the region of interest(ROI)was established by finding the maximum value for the figure of merit(FOm)in the upper and lower *** The optimal PDD value of 148 was established by the alpha/beta ratio,and after that,it was possible to measure ^(226)Ra standards to perform the *** efficiency of(9.758±0.035)×1^(0-1) was *** routine measurements,a detection limit of about 0.50 Bq L^(-1) is achieved for a 120 min counting *** evaluate the uncertainty budget,the uncertainties of the net count rate,the efficiency,the sample amount and the decay correction factor were *** A method was developed for the calibration of LSC Tri-Carb 3170 TR/SL with the optimization of the PDD using a ^(226)Ra standard *** acquisition to obtain the plot of the variation

关键词： Radon Waters Pulse decay discriminator Liquid scintillation counting Calibration

Advanced Guided Whale Optimization Algorithm for Feature Selection in BlazePose Action Recognition

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Intelligent Automation & Soft Computing 2023年第9期37卷 2767-2782页

作者： motasem S.Alsawadi El-Sayed m.El-kenawy miguel rio Electronic and Electrical Engineering Department University College LondonLondonWC1E7JEEngland Department of Communications and Electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt

The BlazePose,which models human body skeletons as spatiotem-poral graphs,has achieved fantastic performance in skeleton-based action *** extraction from photos for mobile devices has been made possible by the BlazePose system.A Spatial-Temporal Graph Con-volutional Network(STGCN)can then forecast the *** Spatial-Temporal Graph Convolutional Network(STGCN)can be improved by simply replacing the skeleton input data with a different set of joints that provide more information about the activity of *** the other hand,existing approaches require the user to manually set the graph’s topology and then fix it across all input layers and *** research shows how to use the Statistical Fractal Search(SFS)-Guided whale optimization algorithm(GWOA).To get the best solution for the GWOA,we adopt the SFS diffusion algorithm,which uses the random walk with a Gaussian distribution method common to growing *** values are transformed into binary to apply to the feature-selection problem in conjunction with the BlazePose skeletal topology and stochastic fractal search to construct a novel implementation of the BlazePose topology for action *** our experiments,we employed the Kinetics and the NTU-RGB+D *** achieved actiona accuracy in the X-View is 93.14%and in the X-Sub is 96.74%.In addition,the proposed model performs better in numerous statistical tests such as the Analysis of Variance(ANOVA),Wilcoxon signed-rank test,histogram,and times analysis.

关键词： BlazePose metaheuristics convolutional networks feature selection action recognition

Behavior of wood basic density according to environmental variables

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Journal of Forestry Research 2022年第2期33卷 497-505页

作者： Gabriel marcos Vieira Oliveira Josémárcio de mello Carlos Rogério de mello JoséRoberto Soares Scolforo Eder Pereira miguel Thiago Campos monteiro Brazil Institute of Agricultural and Forestry Defense of Espírito Santo(IDAF) Av.Lourival Lugon Moulinnº300CentroJerônimo MonteiroES CEP:29.550-000Brazil Department of Forestry Sciences Universidade Federal de Lavras-UFLACaixa Postal 3037LavrasMG CEP:37.200-000Brazil Engineering Department Universidade Federal de Lavras-UFLACaixa Postal 3037LavrasMG CEP:37.200-000Brazil Forestry Engineering Department Faculdade de TecnologiaUniversity of Brasilia-UnBCampus Universitário Darcy RibeiroCaixa Postal 4357Asa Norte-BrasíliaDF CEP:70910-900Brazil Department of Forestry Engineering and Technology Universidade Federal do Paraná-UFPRAv.Pref.Lothário Meissner632Jardim BotânicoCuritibaPR CEP:80.210-170Brazil

The relationships between climate conditions and wood density in tropical forests are still poorly *** quantify spatial dependence of wood density in the state of minas Gerais(mG,Brazil),map spatial distribution of density,and correlate density with climate variables,we extracted data from the Forest Inventory of minas Gerais for 1988 trees scaled throughout the territory and measured wood density of discs removed from the *** variables were extracted from the database of the Ecological-Economic Zoning of minas *** spatial analysis,tree densities were measured at 44 georeferenced sampling *** data were subjected to exploratory analysis,variography,cross-validation,model selection,and ordinary *** relationships between wood density and environmental variables were calculated using dispersion matrices,linear correlation,and *** density proved to be highly spatially dependent,reaching a correlation of 96%,and was highly continuous over a distance of 228 *** distribution of wood density followed a continuous gradient of 514-659 kg m^(−3),enabling corre-lation with environment *** was correlated with mean annual precipitation(−0.57),temperature(0.63),and evapotranspiration(0.83).Geostatistical methods proved useful in predicting wood density in native tropical forests with different climate *** results confirmed the sensitivity of wood density to climate change,which could affect future carbon stock in forests.

关键词： Biomass Climate variables Geostatistics Hardwood Forest inventory minas Gerais

Trivial and Simple Spectrum for SL(d,R) Cocycles with Free Base and Fiber Dynamics

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Acta mathematica Sinica,English Series 2015年第7期31卷 1113-1122页

作者： m.rio BESSA Paulo VARANDAS Departamento de matemtica Universidade da Beira InteriorRua Marquês d'vila e Bolama6201-001 CovilhPortugal Departamento de matemtica Universidade Federal da BahiaAv.Ademar de Barros s/n40170-110 SalvadorBrazil

Let ACD（m, SL（d,R）） denote the pairs （f, A） so that f∈ A C Diff^1（m） is a C^1-Anosov transitive diffeomorphisms and A is an SL（d,R） cocycle dominated with respect to f. We prove that open and densely in ACD（m, SL（d,R））, in appropriate topologies, the pair （f,A） has simple spectrum with respect to the unique maximal entropy measure μf. Then, we prove prevalence of trivial spectrum near the dynamical cocycle of an area-preserving map and also for generic cocycles in AUtLeb（m） × LP（m, SL（d, R））.

关键词： Linear cocycles Lyapunov exponents Anosov diffeomorphisms topological conjugacy,maximal entropy measures

Rare earth metal as a dopant element:Cerium ion as an articulator in hexavalent chromium removal by magnetic iron oxides

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Journal of Rare Earths 2023年第10期41卷 1616-1626,I0006页

作者： Pricila maria Batista Chagas maísa m.m.Lima Aline Aparecida Caetano Lucas Bragança Carvalho Nayra maria de Abreu Piva maria Eduarda Resende Luiz Iara do Rosário Guimarães Laboratory of Environmental Catalysis and New materials Department of ChemistryFederal University of LavrasCEP 37200-900LavrasMGBrazil Department of Viticulture&Enology University of CaliforniaDavisCA95616USA Institute of Science and Technology São Paulo State University18087-180SorocabaBrazil

This study highlights introducing the rare earth metal cerium(Ce(Ⅳ))into the structure of magnetite(Fe_(3)O_(4))to achieve enhanced adsorptive properties for the removal of chromium(Cr(VI))from an aqueous *** ratios of Ce(Ⅳ)were introduced into the iron oxide matrix,termed FeCe-5,FeCe-10,and *** numerical values correspond to the nominal content of the dopant element added to the synthesis *** solid materials were characterized for morphology and chemical structure,and N_(2)physical adsorption/desorption measurements were *** solid materials doped with Ce(IV)have a high surface area compared to Fe_(3)O_(4),and the solid material with the highest content of the dopant ion(Ce(IV))has a 4-fold greater surface *** increase in the dopant content in the iron oxide structure leads to a total chromium removal of 93.3%.Isotherms studies on the solid materials show that chromium adsorption follows the Langmuir *** adsorption capacity to Fe_(3)O_(4)is 12.59 mg/g and FeCe-10 is 22.49 mg/g at 35℃.By fitting the kinetic and isothermal models,it is found that for the Fe_(3)O_(4)and FeCe-10 materials Cr(VI)removal occurs in very different ways,attributed to the different surface areas and compositions of the oxide,with the formation of the goethite(α-FeOOH)*** FeCe-10reuse process was performed and the removal capacity the Cr(VI)is reduced after the first *** result is attributed to a strong and irreversible adsorption of Cr(VI)on the FeCe-10.

关键词： Bimetallic oxides Fe-Ce interaction Oxygen vacancies Adsorption Cr(Ⅵ) Rare earths

Photonics of time-varying media

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Advanced Photonics 2022年第1期4卷 30-61页

作者： Emanuele Galiffi Romain Tirole Shixiong Yin Huanan Li Stefano Vezzoli Paloma A.Huidobro m.rio G.Silveirinha Riccardo Sapienza Andrea Alù J.B.Pendry City University of New York Photonics InitiativeAdvanced Science Research CenterNew YorkUnited States Imperial College London Blackett LaboratoryDepartment of PhysicsLondonUnited Kingdom Nankai University School of PhysicsTianjinChina Instituto de Telecomunicações Instituto Superior Técnico-University of LisbonLisboaPortugal City University of New York Physics ProgramGraduate CenterNew YorkUnited States

Time-varying media have recently emerged as a new paradigm for wave manipulation,due to the synergy between the discovery of highly nonlinear materials,such as epsilon-near-zero materials,and the quest for wave applications,such as magnet-free nonreciprocity,multimode light shaping,and ultrafast *** this review,we provide a comprehensive discussion of the recent progress achieved with photonic metamaterials whose properties stem from their modulation in *** review the basic concepts underpinning temporal switching and its relation with spatial scattering and deploy the resulting insight to review photonic time-crystals and their emergent research avenues,such as topological and non-Hermitian *** then extend our discussion to account for spatiotemporal modulation and its applications to nonreciprocity,synthetic motion,giant anisotropy,amplification,and many other ***,we conclude with a review of the most attractive experimental avenues recently demonstrated and provide a few perspectives on emerging trends for future implementations of time-modulation in photonics.

关键词： time-varying media temporal modulation metamaterials switching optics photonics light