Does modality matter? A latent profile and transition analysis of sedentary behaviours among school-aged youth: The UP&DOWN study

ABSTRACT

The aims of this study were to identify profiles of sedentary behaviour (SB) patterns, based on leisure-time self-reported SB modalities (screen, educative, social, and relaxing) and to evaluate changes in these profiles over 2 years among Spanish youth aged 8–18 years. Latent profile analysis (LPA), a data-driven analytic approach, was used to identify groups of boys and girls (n = 1553; 48% girls; mean±SD age: 12.56 ± 2.49 y) with distinct SB profiles using the SB modalities (time/d) as input variables. Latent transition analysis, an extension of LPA that uses longitudinal data, was used to analyse 2-year changes in these profiles. At baseline, four and three SB profiles were found among boys (labelled: screen, educative, social, and relaxing) and girls (labelled: screen/social, educative, and relaxing), respectively. Overall, more girls (range: 48%-67%) had the same profile over time, than boys (40%-52%). Participants with a screen or relaxing SB profile at baseline were more likely to have an educative profile after 2 years. Youth with a social and an educative SB profile at baseline were more likely to transition to profiles characterized by higher screen and social SB, respectively. Using a novel and person-centered approach, this study identified gender-specific SB profiles that were moderately stable over time.     

基于专利引用跨越度计量的两国间间接创新合作机会发现

[目的/意义] 两个国家间的创新合作机会有些是显性直接的，有些是潜在间接的。在此试图构建一种计量和分析专利引用关系的方法，用于发现两国间潜在的间接创新合作机会。[方法/过程] 全球价值链上不同环节专利之间的引用关系中，蕴含着相互衔接、配套的间接合作关系，而不同环节的专利通常具有不同的功能，即IPC存在一定跨越度。因此，设计"专利引用跨越度"指标及算法，用于计量和筛选专利引用网络中"引用跨越度"达到预设阈值的专利引用关系，作为发现间接创新合作机会的基础数据。以新加坡在中国获得授权的发明专利为样本，基于专利引用跨越度计量并配合人工解读和识别，发现中新两国间一系列的间接创新合作机会。[结果/结论] 基于专利引用跨越度计量的两国间间接创新合作机会发现的方法，被实验检验为有效。     

Best of both worlds or refusal to comply? The rich kids of Tehran on Instagram

ABSTRACT

This article offers a textual analysis and semiotic reading of the Rich Kids of Tehran's (RKOT’s) Instagram page. Contributing to scholarship on Iranian youth media practices, this article interrogates how the RKOT navigate urban and rural space to engage in everyday processes of resistance against global and local systemic oppression. Grounding their visual representations on Instagram in historical and cultural context, the author questions how and when quotidian actions are transformed into political transgressions when posted on social media. This article emphasizes the RKOT's agency in shaping their brand by analyzing representations of gender performance, intertextuality, and national identity on Instagram.     

"物质利益"与现阶段运动队的思想工作

通过对运动队要求提高物质待遇性质的分析,阐明了物质利益的作用,并进一步论述了物质利益与精神奉献的关系。     

时代特征与马克思主义的理论形态

150多年来，马克思主义随着人类历史的发展和时代课题的解决，在实践中形成了新的形态，使马克思主义成为与时俱进的普遍真理，使社会主义在曲折中不断向前发展，成为人类社会发展不可逆转的总趋势。     

邓小平同志对中国政治发展的巨大贡献

自十一届三中全会以来,中国的政治发生了巨大变化,实现了个人集权向集体集权的转变,实现了国家政治生活的正常化以及政坛上新老集体的稳定过渡,建立建全了各项民主制度;实现了一定程度的分权和党政分开.总之,中国的政治发展在二十年来取得了重大的进步.在这些重大进步的背后,邓小平同志做出了卓越的理论探索与实践贡献.     

教师专业化背景下反思型体育教师培养模式

教师的专业化发展要求教师成为反思型教师,而反思型教师的成熟和发展离不开教育实践的锻炼和促进,只有将实践中反映出来的问题上升到理论层面加以反思,才能探寻到根源,使主体的合理性水平得到提升和拓宽.体育教师要坚持积极的自我反思与实践,以主体身份投入其中,扩大自己的专业视野,逐步养成教育反思的习惯,建立自我反思机制,成为反思型教师,同时促进教师专业化发展.     

Canaletto’s paintings open a new window on the relative sea-level rise in Venice

The paintings by Canaletto (1697–1768), made with the help of a camera obscura, are just like real photographs, documenting as they do the Venice of the XVIII century with an accurate reproduction of all the details. The brown–green front left by the Laminaria, an alga living between the high and low tide, constitutes a precise biological indication of the average level of the high tide. By comparing the level of this front at Canaletto’s time with the present level, we can calculate/discover the relative sea level rise which has occurred in the last two and a half centuries.     

亨廷顿政治发展观的变化

80年代末,国人掀起了研究亨廷顿政治思想的热潮.然而,也就是这个时期,亨廷顿的政治发展观发生了重大变化,他的民主取向的政治发展观代替了威权取向的政治发展观.本文试图从他早期政治发展观存在的缺点入手来分析这一重大变化.     

体育院校思想政治教育的改革与发展

思想政治教育既要以科学发展观为指导,推进自身改革和发展,又要引导和帮助人们结合实际学习、运用科学 发展观,为各项工作改革和人的发展提供正确思想指导。