浅谈如何上好植物学实验课

随着当今社会的进步与发展,人们对生活环境也有了很高的要求,从而对绿色植物有了更高的追求,这也就造成了对科研人员的要求更高了,得经过他们的实验分析,才能培育出更好的绿色植物品种来满足人们的需求,培养这些科研人员的任务也就落到了教师们的身上。植物学是研究植物界和植物体的生活和发展规律的科学。在整个植物学的教学活动中,植物实验是教学工作的重要组成部分,它对提高教学工作,培养学生的独立工作能力起着极为重要的作用。只有通过实验,学生才能更好地掌握基础知识和基本技能,也只有通过实验观察,学生才能真正理解植物生命活动的规律和基本原则。为此,必须提高和加强植物学实验的教学质量,学生才能真正理解和掌握所学的植物学知识。     

浅谈小学生语感能力的培养

语感是学生语言基础,生活体验,思想情趣和文字修养的综合体现,是人们通向更高语言文字境界的桥梁,实际教学中教师应利用各种方式培养学生的语感,使我们的语文教学能让学生真正获得语言,掌握语言,运用语言,更好地传承和发扬祖国文字与文化.     

创新能力在工程实训中的培养

高等教育培养学生的最终目的,是使其成为一名既懂理论又有创新能力的技能型人才。只有掌握一定的感性知识才能深入理解有关理论内容,才能为学好本专业打下良好的基础,使学生真正明白实践出真知的道理。工程实训教学对提高学生的综合能力,培养学生的创新意识和实践能力具有特殊的作用。     

重在理解抓住本质

正初中物理知识从学生的认知难易程度分为声、热、光、力、电五大部分,学生更容易接受理解。但是有一部分知识比较抽象学生不容易掌握,在教学中应使学生明白只有抓住事物的本质,才能更好地理解和掌握这部分知识。下面就一些知识难点探究如何抓住事物本质达到教学目的,希望对大家有一点启示。一、光现象人教版八年级物理上册第五章介绍透镜及其应用,众所周知凸透镜成像规律是本章的重难点。通过课堂演示实验或者学生动     

小学语文教育中如何加强情感培养

情感培养是小学语文教育的重要内容,也是语文教学的重要目标。在小学语文教学中注重情感的培养,对于学生的语文学习是具有非常重要的促进作用的。语文教学过程不只是语言文字训练的过程,也不只是探索作者思想观点的过程,还是感受、领悟、体验情感的过程。只有加强情感培养,才能激发学生的语文情感,更好地理解文本内涵,陶冶学生的情操,真正提高学生的素质。     

谈初中实验教学中学生基本能力的培养

科学是一门以实验为基础的综合性学科。许多现象和结论只有通过实验才能得到解释,各种现象的本质以及深层次的理解必须通过实验才能搞清楚,科学的理论也是人们通过实验总结出来的,所以实验教学在科学教学中占有非常重要的地位。我认为在科学教学中应该让学生动起来:动手、动眼、动口、动脑。培养学生的操作能力、观察能力、表达能力、创新思维能力。培养学生的这些能力主要以科学教学中规范的实验为载体,在实验中培养学生的科学素养。     

浅谈在初中数学教学中学生应用意识的培养

现代信息技术的飞速发展,极大地推进了应用数学与数学应用的发展,使得数学几乎渗透到了每一个科学领域及人们生活的方方面面。学习数学,不能仅仅停留在掌握知识的层面上,而且必须学会应用。只有这样,才能使数学富有生命力,才能真正实现数学的价值。这就要求我们教师必须在教学中注重学生应用意识的培养。本文结合笔者的教学实践,着重阐述在数学教学中如何培养学生的应用意识。     

教学生活化 课堂更精彩

思想品德课程标准指出:人的思想品德的形成与发展,需要学生的独立思考和生活体验,通过学生自身的实践才能真正内化.因此,思想品德教师只有设法构建生活化的课堂,才能使教学融入生活,把生活世界提供给学生体验,在体验生活的过程中掌握知识,发展能力,使学生终身受益.     

大学生物理实验教学要立本于生

学生对物理知识的深刻理解和牢固掌握、探究意识和实践能力的培养都离不开大学物理实验的教学,而只有学生对物理实验感兴趣、有情感,才能认识到物理实验的价值。本文探讨大学物理实验教学中激发学生学习动机的途径,以期通过激发维持学生自主学习的动机,充分调动起学生学习的积极性,让学生真正成为学习的主体从而提高大学物理实验教学效率。     

浅议高中物理教学中如何激发学生的学习兴趣

爱因斯坦说：“兴趣是最好的老师”。杨振宁博士也说过：“成功的真正秘诀是兴趣”。学生只有对物理感兴趣,才想学、爱学,才能学好,从而用好物理。因此,激发学生学习物理的兴趣,是提高教学质量的关键。
　　一、重视实验教学,激发学生学习物理的兴趣
　　物理学是一门实验科学,物理概念的建立与物理规律的发现,都以实验事实为依据。实验是物理学的重要研究方法,只有重视实验,才能使物理教学获得成功,才能真正理解和掌握知识。如,在讲授机械能守恒定律时,可用一个单摆来做实验。先将摆球拉个较大的角度使之贴近眼睛,人站着不动,然后放手,使单摆摆动起来。很多学生都替教师担心,生怕摆球会碰到教师的眼睛。实验结果却出乎学生的意料。通过实验,把学生的注意力集中起来,为下一步解决“为什么”做好准备。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

Low doses of a red wine ingredient figh diabetes in mice

Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Molecular motor assembly of a biomimetic system

Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence