Peptidoglycan-inspired autonomous ultrafast self-healing bio-friendly elastomers for bio-integrated electronics

Elastomers are essential for stretchable electronics, which have become more and more important in bio-integrated devices. To ensure high compliance with the application environment, elastomers are expected to resist, and even self-repair, mechanical damage, while being friendly to the human body. Herein, inspired by peptidoglycan, we designed the first room-temperature autonomous self-healing biodegradable and biocompatible elastomers, poly(sebacoyl 1,6-hexamethylenedicarbamate diglyceride) (PSeHCD) elastomers. The unique structure including alternating ester-urethane moieties and bionic hybrid crosslinking endowed PSeHCD elastomers superior properties including ultrafast self-healing, tunable biomimetic mechanical properties, facile reprocessability, as well as good biocompatibility and biodegradability. The potential of the PSeHCD elastomers was demonstrated as a super-fast self-healing stretchable conductor (21 s) and motion sensor (2 min). This work provides a new design and synthetic principle of elastomers for applications in bio-integrated electronics.     

论我国食品安全监管模式的完善

食品安全是不仅关系人民群众身体健康和生命安全,而且关系经济发展和社会稳定的重要问题。随着经济的发展,越来越多的食品安全问题暴露,特别是近几年,食品安全问题越来越显著。本文针对我国目前食品安全监管模式存在的问题,对食品安全监督模式的完善提出了一些建议。     

科研用户访问国外学术数据库的隐私保护与对策

[目的/意义] 针对我国科研工作者获取国外学术信息过程中涉及的隐私保护问题，提出相关建议、对策与防范策略，并探讨大数据与区块链隐私保护技术及其实现隐私保护的可行策略。[方法/过程] 通过对国外学术数据库平台网站的访问数据进行收集分析，发现这些数据库平台除了在其自身网站中插入收集用户信息的脚本外，还存在使用第三方平台脚本对用户信息进行实时收集的情况，并对此结果进行分析，挖掘其关联性。[结果/结论] 通过大数据技术，科研用户访问国外学术数据库信息可为数据库商及其合作伙伴或政府机构所获取利用，致使科研用户的隐私信息发生泄露的风险，从而导致个人安全问题、财务问题，甚至国家安全问题，需要从多个层面加以重视。     

中国体育旅游精品项目申报和评选研究——对2012中国体育旅游博览会“精品项目”分析

以2012中国体育旅游博览会"精品项目"申报和评选为研究对象,运用文献资料法、访谈法等研究方法,结合往年相关评选结果对其进行分析后发现:各申报项目分布广、种类多,但软硬件条件参差不齐,申报资料形式和内容不够规范和完善;评选过程比较客观公正,但缺乏相应评价标准;后续宣传起到一定推广作用,但没有推出一个指南性成果(如画册、图书等)。建议在今后评选中,建立准入制度,明确项目申报条件,规范申报资料内容、形式;设置项目评价标准,按标准要求对各项目进行评价;评选结束后,将结果通过强势媒体进行发布,并推出有实用价值成果,反馈和服务于旅游者。     

Detecting the correlation between mobile learning behavior and personal characteristics among elementary school students

ABSTRACT

This study aimed to explore the features of mobile learning behaviors among Chinese elementary school students, and relationships between mobile learning behaviors and personal characteristics in mobile learning environment. The current study designed and developed a game-based educational mobile environment and conducted an experimental research. Eighty-three elementary students participated in this study. The results revealed the features of elementary school students’ mobile learning behavior including: 1) the students had reasonable login frequencies and learning time duration with appropriate guidance from the teachers, and satisfying learning performance by self-learning; 2) higher grade, learning style with active information processing and higher test scores in the conventional Chinese subject course had positive impacts on the mobile learning behaviors, but no gender difference was found. Regrettably, students showed more digital consuming than digital creating in the current study. The results could provide necessary suggestions on mobile learning for young learners.     

高校思想政治教育进网络现状的调查报告——以河南科技学院为例

随着信息技术的迅速发展,互联网越来越成为当代大学生获取知识和各种信息的重要渠道,同时,又使高校的学生思想政治教育工作面临着严峻的挑战。文章通过对河南科技学院学生利用网络基本情况的调查,分析了当前高校思想政治教育进网络工作的必要性和可行性,并进行了相应的对策思考。     

点校本《新唐书·艺文志》正误

中华书局点校本《新唐书.艺文志》按经、史、子、集四部分类,共收录图籍七万九千二百二十一卷。相较《隋书.经籍志》和《旧唐书.经籍志》,点校本《新唐书.艺文志》存在不少错讹,或作者名张冠李戴,或书籍名鲁鱼亥豕,在此予以正误。     

我国西部中小学校图书馆资源配置探析 ——基于东西部的对比

针对我国东西部地区中小学图书馆资源配置差距的现状,分析其存在的问题,提出应采取制定有效发展规划、建立良好体制、搭建信息资源共享平台等措施,推进我国西部中小学图书馆与西部地区基础教育的发展,实现教育公平.     

《广群芳谱》对辞赋语词的研究价值

《广群芳谱》是清朝康熙年间编订的关于植物种植的类书,书中为解释许多植物名词而引用了大量辞赋语句,这对于辞赋有词源学以及名物考释的作用,对辞赋研究具有很大的贡献与参考价值.