多维度观察信息技术课堂

网络教室和各种电子教室软件的普及使用,给信息技术教师演示教学和机房管理带来了便利。在这种教学环境中,由于教师和学生面对的都是显示器,使得师生之间的眼神、肢体语言等交流逐步减少。离开了面对面的交流,教师通过观察获取反馈信息的手段被逐步淡化。因此,网络没有拉近师生的距离,反而在师生之间筑起了一道无形的墙,其直接后果就是教师更关注于把精心设计的教学内容顺利展现出来,却无法即时与学生进行沟通和反馈,无法对课堂上瞬息万变的事件快速地做出回应。可见,先进的技术在带来各种便利的同时,也衍生出了不少副作用。针对这一现象,立足于教师的自我课堂观察,笔者进行了相关研究,期望广大信息技术教师关注课堂观察,实现有效教学。     

Observing the quantum anomalous Hall effect

<正>Soon ater the article‘Experimental Observation of the Quantum Anomalous Hall Efect(QAHE)in a Magnetic Topological Insulator’was published online in Science,Qikun Xue,the team leader of this fabulous work rom Tsinghua University,was looded with requests for interviews.his is not so surprising.Physicists have been waiting for the observation of the QAHE for over 20 years,and,until 2013,there had been few groundbreaking experimental results.‘he honor absolutely belongs to the     

Observing second sound in ultracold Fermi gases

<正>Water lowing down a pipe experiences viscous drag that causes it to lose energy and slow down.A superluid,such as liquid helium(3He and4He)or electrons in a superconductor,can low without friction when in contact with a wall.his fascinating phenomenon,or superluidity,was discovered by Kapitza[1],Allen and Misener[2]in 1937.he formation of a superluid is related to the formation of a Bose–Einstein condensate(BEC).4He is a boson     

活体红细胞变形性监测系统的应用

应用“捷变彩色高速摄影法”理论,结合先进的显微图像摄录和分析技术以及改良的活体微循环标本制备技术,研制成功的新型活体红细胞变形性监测系统,克服了以往体外法不能及时反映体内动态变化的缺点。     

浅析公路工程项目投标应注意的问题

文章就如何在公路工程项目投标过程中,按照规范及招标单位的要求组织得力,决策合理,使其处于有利形势,最终在市场竞争中立于不败之地进行了阐述.     

数据库用户检索决策的观察学习行为实验研究

随着互联网信息资源数量的飞速增长,在互联网上进行信息检索已经成为了获取信息的主要来源,而对于学术用户来说,文献数据库网站是他们获取文献资源的重要途径。因此,研究文献数据库网站的用户检索行为对于帮助用户查找到需要的文献资源有着重要的研究意义,而在用户检索行为的研究中,观察学习行为研究是非常重要的研究部分。探索数据库用户观察学习行为的机制能够为数据库网站建设和数据库资源建设提供重要的参考依据。     

Solar Radio Astronomy and Plasma Non-thermal Processes in Solar Atmosphere

1.Introduction Solar radio astronomy is an important branch of solar physics,which deals with the radio emission from the solar atmosphere.In solar physics,one of the greatest challenges is to understand the energy storing in the hot atmospheric plasma above sunspots and its sudden releasing in eruptive processes,such as solar flares,eruptive filaments,and     

Solar Radio Astronomy and Plasma Non-thermal Proccsscs in Solar Atmosphere

1. Introduction Solar radio astronomy is an important branch of solar physics, which deals with the radio emission from the solar atmosphere. In solar physics, one of the greatest challenges is to understand the energy storing in the hot atmospheric plasma above sunspots and its sudden releasing in eruptive processes, such as solar flares, eruptive filaments, and coronal mass ejections （CME）. Intrinsically,     

Solar Magnetic Helicity

Helicities is topologically a measure of the structural complexity of the corresponding fields.The magnetic helicity can be separated into two kinds.One is the self helicity,which relates to the magnetic flux tubes twisted themselves.This helicity may be used to analyze the twisted     

三元参与理论视角下怀柔科学城建设现状分析及发展对策建议

基于三元参与理论,分析怀柔科学城建设中政府在创新环境营造、大学科研机构在技术和人才提供、企业在开拓市场方面存在的问题,包括管理机制不畅、生活服务配套不足,大学科研机构不足、科技资源共享机制不完善,以及产业结构支撑不足、企业创新能力弱.为推动怀柔科学城建设综合性国家科学中心,引领北京转型升级高质量发展,提出怀柔科学城建设...     

高原小儿氯胺酮麻醉术中观察及护理

氯胺酮是一种非巴比妥类速效静脉全麻药，可选择性抑制大脑联络径路和丘脑—新皮质系统兴奋，有抑制和兴奋两种效应，故可出现痛党消失，意识模糊，表情淡漠，浅睡眠状态，对环境变化敏感，有时唤之能醒并能回答问题，呈意识、感觉分离状态。在高原上氯胺酮广泛用于临床，特别适用于小儿手术麻醉。因此术中观察尤其重要，为防止术中麻醉并发症及麻醉意外的发生，护士应从各方面严密观察用药后的反应和术中病情变化。     

A Network of Trio Stations to Rcccive Land Observing Satcllite Data

By the end of 2011, researchers from the Center for Earth Observation and Digital Earth (CEODE), Chinese Academy of Sciences had mainly completed the construction of a National Data Receiving Network f...     

Observing bodies. Camera surveillance and the significance of the body

At the most mundane level, CCTV observes bodies, and as such attaches great importance to the specific features of the human body. At the same time, however, bodies tend to disappear, as they are represented electronically by the camera monitors and, in the case of image recording, by the computer systems processing data. The roles of bodies(either as targets of surveillance or as translations into flows of disembodied information), however, are not unimportant or inconsequential, but may in fact give rise to a number of tangible ethical dilemmas. Firstly, the virtual representation of the embodied actor is not a neutral, unproblematic process. Body representation techniques such as CCTV produce constructions of the subject that involve judgmental, discriminatory processes of categorisation and are based on asymmetrical relations between observers and observed. Secondly, the `data doubles' are not inconsequential: the representations of the body produced by CCTV can have palpable consequences for the embodied self and its life chances. The widespread use of CCTV could therefore give rise to individual as well as social issues, and possibly in a different manner than previous surveillance technologies. This fact signals the need for(re-)conceptualisations of moral values (such as privacy) applicable to the case of CCTV which take into account the importance of bodily protections. This revised version was published online in July 2006 with corrections to the Cover Date.     

New Vacuum Solar Telescope

With its pure aperture up to 985mm,the New Vacuum Solar Telescope of China(NVST) has become the world’s biggest vacuum solar telescope.The main science task of NVST is the high-resolution observation of photosphere and chromosphere including their fine structure of magnetic field on the sun.The NVST was equipped with many new