Sleep quality in athletes under normobaric hypoxia equivalent to 1500 m altitude: A polysomnographic study

Abstract

In the present study, we evaluated the duration of slow-wave sleep (Stage 3 and 4) and total delta power (< 3Hz) in all-night non-rapid eye movement (NREM) sleep electroencephalograms (EEGs) of athletes during normobaric hypoxia at simulated altitudes of 1500 m. Seven male athletes slept for two nights in a normoxic condition and one night in an hypoxic condition equivalent to an altitude of 1500 m. Whole-night polysomnographic recordings, thoracic and abdominal motion, nasal and oral airflow, and blood oxygen saturation (SpO₂) were recorded. Visual sleep stage scoring and fast Fourier transformation analyses of EEG were performed using 30-s epochs. Mean and minimum SpO₂ decreased significantly during sleep in the hypoxic condition. Between groups, changes in heart rate, respiratory disturbance measures including apnoea and hypopnoea, slow-wave sleep and total delta power of the all-night NREM sleep EEG were small and non-significant for the hypoxic condition_. However, individual difference in time at an SpO₂ below 90% were large in the hypoxic condition, and both slow-wave sleep and total delta power of all-night NREM sleep EEG decreased in three participants who spent a prolonged time below 90% SpO₂. The present results suggest that monitoring time below 90% SpO₂ is recommended when studying individuals' living-high schedule even under hypoxic conditions equivalent to an altitude of 1500 m.     

改进微粒群算法在机组组合问题中的应用

提出一种求解机组组合问题的改进微粒群优化算法.将机组启停状态变量和机组输出功率连续变量融合为一个变量,提出伪输出功率编码,降低计算的时间复杂度;对机组分类动态调整,对多时段有效地直接优化;对各种约束进行数学处理、修复处理,提高种群质量.优化结果显示该方法有效可行.     

农业强国、乡村振兴与农业农村现代化——新时代\

农业强国是中国针对新时代“三农”工作提出的一个新的政策范式,标志着建设农业强国正式被纳入社会主义现代化强国建设的战略体系。采用语义分析和语境分析方法,考察农业强国的概念,辨析中国语境中农业强与国家强的关系, 发现农业强国的概念传达了双重语义,对应于此,农业强在农业和国家两个范畴内产生意义。世界语境中的农业强国更偏重第一重语义,而中国语境中的农业强国更偏重第二重语义。根据内涵范畴对等原则,在第二重语义下,农业强与国家政治强和经济强都存在密切关联,且前者强于后者。建设农业强国的纲领性原则是,尽可能地消除导致双重语义呈现互斥关系的条件,探索并强化使双重语义产生互补关系的条件,即要兼顾国家发展和农民幸福,实现农业强之于政治强和经济强的有机统一。

     

我国公立高校内部权力研究——基于治理理论的视角

治理理论为我国公立高校内部权力研究提供了独特的分析视角,公立高校治理所要关注的问题是什么样的权力分配制度能有效保证大学目标和理念得以实现。政治权力、行政权力与学术权力是公立高校的三大权力存在形式,通过从权力资源配置的角度切入,形成公立高校“三权”三维研究空间,解构和构建中国公立高校权力整合机制,提出公立高校内部权力中心下移,三权分立及“三A”的优化重组原则,以及三权权力资源重新配置整合的路径和框架。     

世界著名理工院校学科建设的共同经历

通过研究五所有代表性的世界著名理工院校的校史及相关文献资料,追溯了其在学科建设方面的历史,总结了它们的共同经历,为我国理工院校通过学科建设来冲击世界一流大学提供了启示。     

The Impact of Workplace Bullying on Primary School Teachers and Principals

While previous research has consistently cited education as a high risk profession for negative workplace relationships, there has been little consideration of the impact of workplace bullying for those involved. This paper seeks to address this lacuna through the analysis of 24, in-depth interviews with self-identified victims of workplace bullying who work, or have worked, in primary schools. The study reveals the profound physical, psychological, social, and economic effects of these toxic behaviors upon the interviewees, along with the resistance strategies they employed to help them cope with their experiences. Through a lens of Foucauldian conceptualisation of power, this study explores the broader implications for school organizational culture, as well as for individual teachers and the pupils they teach.     

我国体育行政执法方式改革研究

新时代对体育强国和体育法治建设提出了新要求，行政执法作为体育强国建设的重要抓手也面临着方式革新的机遇和挑战。简政放权背景下，体育执法面临着“应不应该管、怎样管”的尴尬处境，广为体育行政执法主体运用的强制性执法手段极易加剧执法矛盾，执法的社会效果得不到保障。由于传统执法方式难以适应新时代体育市场监管的现实需要，革新体育行政执法方式就显得尤为必要。面对时代课题，应遵照由“形式优化”到“实质革新”的逻辑，并树立行政平衡、服务合作和正当程序的理念，从引入信用工具、推广非强制性执法和全程说理式执法3个方面推进改革，实现体育行政执法方式的精简化、多元化和法治化。     

生命关怀：赋予小学生人格养成生长的力量——生命关怀下小学生人格养成教育的整体建构研究

开展扎实有效的人格养成教育的序列研究,是江阴市晨光实验小学从＂八五＂到＂十二五＂课题实施的轨迹。文章在简要解读课题的内涵,回顾近20年的研究历程,以及探寻课题研究价值的基础上,从生活指导、社团活动、课堂教学三个维度对操作实施进行了具体的阐释,旨在促进学生形成积极的人生态度,培养健康的审美情趣,养成自主的学习能力。     

Idea generation in biomedical engineering courses using Design Heuristics

ABSTRACT

With increasing demand for improved medical equipment and healthcare, next-generation biomedical engineers need strong design skills. Equipping biomedical engineering students with tools for idea generation and development can increase student design success. Design Heuristics are an ideation tool developed through empirical studies of product designs. While identified in the mechanical engineering space, Design Heuristics may be applicable in biomedical engineering design. In our study, we implemented a Design Heuristics session during upper-level undergraduate and first-year graduate biomedical engineering design courses. We examined the applicability of Design Heuristics within individual and team concept generation contexts. The findings demonstrated that biomedical engineering students were able to use Design Heuristics to generate multiple concepts, and that initial concepts produced using Design Heuristics were carried over into final team design. The results support the applicability of Design Heuristics to student idea generation in biomedical engineering design.