O que ensinar na ginástica rítmica? percepções de treinadoras medalhistas nos campeonatos brasileiros / What to teach in rhythmic gymnastics? perceptions of medalist coaches in brazilian championships / ¿qué enseñar en la gimnasia rítmica? percepciones de las entrenadoras medallistas en los campeonatos brasileños

O objetivo deste estudo foi identificar e analisar o conteúdo desenvolvido na iniciação esportiva competitiva da Ginástica Rítmica (GR). Entrevistamos seis treinadoras das categorias de base de instituições medalhistas em ao menos uma categoria dos Campeonatos Brasileiros de GR 2019. Por meio da análise temática, cinco temas emergiram: (1) Especializar versus Ampliar: fatores que limitam e contribuem para o desenvolvimento físico-motor na iniciação esportiva da GR; (2) O posicionamento corporal é "regra" na GR; (3) Dificuldades corporais: treinar para aprender ou treinar para competir?; (4) De elemento acessório a elemento essencial: a valorização dos aparelhos da GR; (5) Dentro das regras e fora dos treinos: O componente artístico na GR. Sugerimos que o conteúdo preze pelas características, saúde, formação em longo prazo e desenvolvimento integral das ginastas. Por tratar-se de crianças, os resultados não seriam prioritários nessa fase e o conteúdo deveria apoiar-se na visão de futuro da modalidade. (AU)

This study aimed to identify and analyze the content developed in competitive Rhythmic Gymnastics (RG) sports initiation. We interviewed six coaches who worked in basic categories of medalist clubs in the 2019 Brazilian RG Championships. From the thematic analysis, five themes emerged: (1) Specialize versus Expand: factors that limit and contribute to physical-motor development in RG sports initiation; (2) Body positioning is a "rule" in RG; (3) Body difficulties: training to learn or training to compete?; (4) From an accessory element to an essential element: the valorization of RG's apparatus; (5) Within the rules and outside of training: The artistic component in RG. We suggest that the content must respect gymnasts' characteristics, their health, long-term training, and their integral development. As they are children, results would not be a priority at this stage, and the content should be established based on the RG's future vision.(AU)

El objetivo de este estudio ha sido identificar y analizar el contenido desarrollado en la iniciación deportiva competitiva de la Gimnasia Rítmica (GR). Entrevistamos a seis entrenadoras de las categorías de base de instituciones medallistas en al menos una categoría de los Campeonatos Brasileños de GR 2019. A través del análisis temático emergieron cinco temas: (1) Especializar versus ampliar: Factores que limitan y contribuyen al desarrollo físico-motor en la iniciación deportiva de la GR; (2) Posicionamiento corporal es "regla" en la GR; (3) Dificultades corporales: ¿entrenar para aprender o entrenar para competir?; (4) De elemento accesorio a elemento esencial: la valorización los aparatos de GR; (5) Dentro de las reglas y fuera del entrenamiento: el componente artístico en la GR. Sugerimos que el contenido respete las características, la salud, formación a largo plazo y desarrollo integral de las gimnastas. Al tratarse de niñas, los resultados no serían prioridad en esta etapa y el contenido debería apoyarse en la visión de futuro de la modalidad.(AU)

Method to manage integration error in the Green-Kubo method.

The Green-Kubo method is a commonly used approach for predicting transport properties in a system from equilibrium molecular dynamics simulations. The approach is founded on the fluctuation dissipation theorem and relates the property of interest to the lifetime of fluctuations in its thermodynamic driving potential. For heat transport, the lattice thermal conductivity is related to the integral of the autocorrelation of the instantaneous heat flux. A principal source of error in these calculations is that the autocorrelation function requires a long averaging time to reduce remnant noise. Integrating the noise in the tail of the autocorrelation function becomes conflated with physically important slow relaxation processes. In this paper we present a method to quantify the uncertainty on transport properties computed using the Green-Kubo formulation based on recognizing that the integrated noise is a random walk, with a growing envelope of uncertainty. By characterizing the noise we can choose integration conditions to best trade off systematic truncation error with unbiased integration noise, to minimize uncertainty for a given allocation of computational resources.