TED演讲所传播的文化对当代大学生人格塑造的影响     

董宏宇 《科教文汇》2020,(11):181-182

TED演讲视频短小精悍,且富有感染力,内容涉及科技、教育、健康和思想等各个方面。本文通过对本校学生调查后发现:通过两个学期的视频学习和讨论后,学生不但对视频内容印象深刻,而且对演讲者的观点都表示认同,这对当代大学生的人格塑造产生了较大的正向效果。  相似文献   

Simman模拟人在心肺复苏临床技能教学中的调查研究     

丁繁  刘雄  郭晓蓥  朱建坤  王军燕 《科教文汇》2020,(11):96-97

目的:探讨Simman模拟人在心肺复苏技能教学中的应用效果。方法:60名临床医学专业学生参加CPR操作培训,实际操作练习,并对所有学生进行匿名问卷调查,分析Simman模拟人系统在心肺复苏技能教学中的应用效果。结果:90%以上的学生认为Simman模拟人模拟真实,重复性强,89%的学生认为Simman模拟人能充分调动学习积极性,88%的学生认为Simman模拟人操作性强,非常认同Simman模拟人出科考核模式。95%的学生认为Simman模拟人能够全面考核学生的临床思维,91%的学生认为Simman模拟人能够进一步巩固和提高学生的理论知识。结论:Simman模拟人系统在心肺复苏技能实践教学中能明显提高临床技能教学的质量。  相似文献   

学前教师培训现状与培训需求研究——以山东省青岛市为例     

董益帆 《科教文汇》2020,(10):41-43

为有效地提升幼儿教师培训质量,本文通过问卷调查法、访谈法对青岛市173位幼儿教师进行调查,从培训时间、培训内容、培训形式等方面对幼儿教师的培训现状、幼儿教师对已参加培训的满意度及其培训需求进行了调查分析,并提出了相应的对策建议:将教师职业道德放在首位,贯穿培训始终;树立“教师为本”的培训理念,充分结合幼儿教师培训需求;将“互联网+”融入幼儿教师的培训过程,多种培训形式齐发展。  相似文献   

环境工程专业“环境化学”课程双语教学改革的实践与思考     

吕聪  董招君  牛姝  张凤君  董双石 《科教文汇》2020,(13):70-71

双语教学是我国高校建设双一流大学的重要途径。本文结合环境工程专业的特点和人才培养需求,分析了环境化学课程双语教学的必要性和存在的问题,提出了启发-递进式教学模式、优选英文教材、优化教学内容、构建网络平台和建立多元化考核制等多种方法相结合的教学改革措施。  相似文献   

“互联网+”时代背景下“科研思路与方法”教学模式探讨     

邓思思  陈江  张蕖  陈书  朱旭  魏歆然  魏高文  宋祯彦 《科教文汇》2020,(13):87-88

当前,国家对大学本科的教育愈发重视,提出了多种教改方案。面对“互联网+”快速发展的形势,文章分析了“互联网+”时代背景下“科研思路与方法”新型教学模式的优势以及如何高效率地构建。通过教师、学生、互联网三者协调配合以及师生的线上互动交流和讨论,可以充分调动学生独立思考、自主学习的积极性,同时增加了教学趣味性,提高了教学质量。  相似文献   

基于资源共享与商业视角的大学城校际交通与物流发展模式探析——以花溪大学城为例     

樊洪  杨建春 《科教文汇》2020,(9):5-7

随着科技的创新与进步,“互联网+”时代迅速发展,大数据产业趋势越加明显,共享发展理念的普及更加广泛。共享经济、共享交通、共享物流、共享充电宝等词高频率地出现在人们的工作、学习、生活中。在“互联网+”时代背景下,以花溪大学城为例,综合花溪大学城校际交通、物流需求,分析花溪大学城校际交通物流问题现状及“互联网+”背景对花溪大学城校际交通物流共享问题改善的影响,在满足学生需求、迎合学生利益的前提下,基于资源共享与商业视角提出花溪大学城校际交通物流共享模式。  相似文献   

Ultrabithorax is a key regulator for the dimorphism of wings,a main cause for the outbreak of planthoppers in rice     

Fangzhou Liu  Xiang Li  Muhua Zhao  Mengjian Guo  Kehong Han  Xinxin Dong  Jing Zhao  Wanlun Cai  Qifa Zhang  Hongxia Hua 《国家科学评论(英文版)》2020,7(7):1181

Rice planthoppers, the most devastating rice pests, occur in two wing forms: the short-wing form for rapid population growth and long-wing form for long-distance migration, which together create the mechanism for outbreak. Here we show that Ultrabithorax (Ubx) is a key regulator for switching between the long- and short-wing forms of rice planthoppers. Ubx is expressed in both forewing and hindwing pads, which is different from the canonical model of Ubx expression. In brown planthoppers, expression of Ubx (NlUbx) is regulated by nutritional status of the rice host. High-quality young plants induce NlUbx expression leading to the short-wing form; low-quality ripe plants reduce NlUbx expression resulting in long-wing form. We also showed that NlUbx is regulated by the insulin receptors NlInR1 and NlInR2. The default expression of NlInR1 inhibits NlUbx resulting in long-wings, while high-quality hosts induce NlInR2 expression, which represses NlInR1 thus promoting NlUbx expression to produce short-wings.  相似文献   

Dynamics and manipulation of ferroelectric domain walls in bismuth ferrite thin films     

Shuyu Xiao  Yaming Jin  Xiaomei Lu  Sang-Wook Cheong  Jiangyu Li  Yang Li  Fengzhen Huang  Jinsong Zhu 《国家科学评论(英文版)》2020,7(2):278

Ferroelectric domain walls differ from domains not only in their crystalline and discrete symmetry, but also in their electronic, magnetic, and mechanical properties. Although domain walls provide a degree of freedom to regulate the physical properties at the nanoscale, the relatively lower controllability prevents their practical applications in nano-devices. In this work, with the advantages of 3D domain configuration detection based on piezoresponse force microscopy, we find that the mobility of three types of domain walls (tail-to-tail, head-to-tail, head-to-head) in (001) BiFeO₃ films varies with the applied electrical field. Under low voltages, head-to-tail domain walls are more mobile than other domain walls, while, under high voltages, tail-to-tail domain walls become rather active and possess relatively long average lengths. This is due to the high nucleation energy and relatively low growth energy for charged domain walls. Finally, we demonstrate the manipulation of domain walls through successive electric writings, resulting in well-aligned conduction paths as designed, paving the way for their application in advanced spintronic, memory and communication nano-devices.  相似文献   

Surface superconductivity in the type II Weyl semimetal TaIrTe4     

Ying Xing  Zhibin Shao  Jun Ge  Jiawei Luo  Jinhua Wang  Zengwei Zhu  Jun Liu  Yong Wang  Zhiying Zhao  Jiaqiang Yan  David Mandrus  Binghai Yan  Xiong-Jun Liu  Minghu Pan  Jian Wang 《国家科学评论(英文版)》2020,7(3):579

The search for unconventional superconductivity in Weyl semimetal materials is currently an exciting pursuit, since such superconducting phases could potentially be topologically non-trivial and host exotic Majorana modes. The layered material TaIrTe₄ is a newly predicted time-reversal invariant type II Weyl semimetal with the minimum number of Weyl points. Here, we report the discovery of surface superconductivity in Weyl semimetal TaIrTe₄. Our scanning tunneling microscopy/spectroscopy (STM/STS) visualizes Fermi arc surface states of TaIrTe₄ that are consistent with the previous angle-resolved photoemission spectroscopy results. By a systematic study based on STS at ultralow temperature, we observe uniform superconducting gaps on the sample surface. The superconductivity is further confirmed by electrical transport measurements at ultralow temperature, with an onset transition temperature (T_c) up to 1.54 K being observed. The normalized upper critical field h*(T/T_c) behavior and the stability of the superconductivity against the ferromagnet indicate that the discovered superconductivity is unconventional with the p-wave pairing. The systematic STS, and thickness- and angular-dependent transport measurements reveal that the detected superconductivity is quasi-1D and occurs in the surface states. The discovery of the surface superconductivity in TaIrTe₄ provides a new novel platform to explore topological superconductivity and Majorana modes.  相似文献   

Convergent genomic signatures of high-altitude adaptation among domestic mammals     

Dong-Dong Wu  Cui-Ping Yang  Ming-Shan Wang  Kun-Zhe Dong  Da-Wei Yan  Zi-Qian Hao  Song-Qing Fan  Shu-Zhou Chu  Qiu-Shuo Shen  Li-Ping Jiang  Yan Li  Lin Zeng  He-Qun Liu  Hai-Bing Xie  Yun-Fei Ma  Xiao-Yan Kong  Shu-Li Yang  Xin-Xing Dong  Ali Esmailizadeh  David M Irwin  Xiao Xiao  Ming Li  Yang Dong  Wen Wang  Peng Shi  Hai-Peng Li  Yue-Hui Ma  Xiao Gou  Yong-Bin Chen  Ya-Ping Zhang 《国家科学评论(英文版)》2020,7(6):952

Abundant and diverse domestic mammals living on the Tibetan Plateau provide useful materials for investigating adaptive evolution and genetic convergence. Here, we used 327 genomes from horses, sheep, goats, cattle, pigs and dogs living at both high and low altitudes, including 73 genomes generated for this study, to disentangle the genetic mechanisms underlying local adaptation of domestic mammals. Although molecular convergence is comparatively rare at the DNA sequence level, we found convergent signature of positive selection at the gene level, particularly the EPAS1 gene in these Tibetan domestic mammals. We also reported a potential function in response to hypoxia for the gene C10orf67, which underwent positive selection in three of the domestic mammals. Our data provide an insight into adaptive evolution of high-altitude domestic mammals, and should facilitate the search for additional novel genes involved in the hypoxia response pathway.  相似文献