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.     

Quality flaw prediction in Spanish Wikipedia: A case of study with verifiability flaws

In this work, we present the first quality flaw prediction study for articles containing the two most frequent verifiability flaws in Spanish Wikipedia: articles which do not cite any references or sources at all (denominated Unreferenced) and articles that need additional citations for verification (so-called Refimprove). Based on the underlying characteristics of each flaw, different state-of-the-art approaches were evaluated. For articles not citing any references, a well-established rule-based approach was evaluated and interesting findings show that some of them suffer from Refimprove flaw instead. Likewise, for articles that need additional citations for verification, the well-known PU learning and one-class classification approaches were evaluated. Besides, new methods were compared and a new feature was also proposed to model this latter flaw. The results showed that new methods such as under-bagged decision trees with sum or majority voting rules, biased-SVM, and centroid-based balanced SVM, perform best in comparison with the ones previously published.     

大学生孤独感对手机成瘾倾向的影响:生命意义感的调节作用

为了探究大学生孤独感、手机成瘾倾向和生命意义感之间的关系,采用UCLA孤独量表、大学生手机成瘾倾向量表、人生意义感问卷,选取408名大学生作为被试进行问卷调查。结果发现:(1)孤独感与手机成瘾倾向呈显著性正相关,生命意义感与手机成瘾倾向呈显著性负相关,孤独感和生命意义感相关性不显著;(2)孤独感和生命意义感都显著预测手机成瘾倾向,生命意义感在孤独感和手机成瘾倾向之间的调节效应显著,低生命意义感大学生的孤独感对手机成瘾倾向的预测力更强。因此,大学生的孤独感能正向预测手机成瘾倾向,生命意义感能调节二者之间的关系,低水平的生命意义感会加剧孤独感对手机成瘾倾向的预测作用,而高水平的生命意义感会使孤独感对手机成瘾倾向的影响较小。     

充分发挥档案在高校工作中的作用

学校档案全宗是高校的宝贵财富,它为学校领导决策服务、为广大教职工从事学校管理、教学科研等工作提供可靠的依据和参考。因此,只有了解和掌握档案利用者的需求特点,规范档案管理,充分挖掘档案信息资源,提高档案工作者的素质,才能高效发挥档案在高校工作中的作用。     

中药组方对提高有氧耐力运动员成绩的作用

把运动性疲劳的机体视为微细损伤的集合体,据此认识进行中药组方.通过对20名耐力跑运动员进行3个月分组对照实验后,测定实验前后的血色素(Hb)、个体乳酸阈值的跑速、红细胞(RBC)-SOD活性、RBC-GSH-Px活性、血浆丙二醛(MDA)的含量、RBC-MDA含量、定量负荷后血乳酸恢复速率和5000m跑最好成绩变化等.结果显示:服用中药组的各项指标和运动成绩均明显优于对照组(P＜0.05),表明本中药组方具有保护组织细胞、延迟疲劳出现和加快机能恢复的效果,对提高耐力运动成绩有良好的作用.     

关于审判监督程序法律设置的探析

审判监督程序是我国刑事诉讼中的一项重要补救程序。笔者在对这一程序进行分析后认为,法院不能成为审判监督程序的提起机关。如果由法院提起审判监督程序,会导致诉讼职能的混淆,导致法律监督的错位,引起证据规则的混乱,带来上诉不加刑原则的虚置等后果。从完善审判监督程序出发,提出审判监督程序的提起机关一体化,对按审判监督程序审理的案件一律开庭审理,从而保证审判监督程序的作用得到充分发挥。     

关于大学生体育健康教育理念的探讨

通过分析学校体育对大学生健康教育的重要性 ,进而提出大学生要树立正确健康教育理念的观点 ,并提出大学生体育健康教育的几条途径     

健美操运动中造型美、节奏美、气质美的艺术特征

阐述了健美操运动中优美动作之造型美，节拍鲜明之节奏美，内外合一之气质美的艺术特征。健美操运动中造型美的艺术特征是主体创造性、生动可视性和形象具体性；节奏美的艺术特征是主体的创造性、创造的动态性、时间的片断性、动作的对称性、节拍的变化性；气质美的艺术特征是主体的自然性和社会性。     

论学校体育对大学生心理健康教育的影响和对策

通过分析制约大学生心理健康教育的主要因素 ,提出了体育运动不仅有助于身体健康 ,对心理健康同样具有积极促进作用 ,还可利用学校体育的教育功能 ,提高大学生的心理素质的对策。