“土豆先生”的微距世界(植物篇)

将植物的叶片、枝干、花朵等放大80倍、100倍、200倍,甚至更多倍数,是什么样的呢?我们一起跟随"土豆先生"——刘彦麟同学走进微距世界,来瞧一瞧吧!     

“土豆先生”的微距世界(动物篇)

植物的叶片、枝干、花朵等被放大后可好看了。如果把植物的好朋友--动物的腿、躯干、细胞等放大80倍和200倍,又是怎样的呢?我们再次跟随“土豆先生”--刘彦麟同学走进微距世界,来瞧一瞧吧!     

微分方程y"=f(y')的解法

本文通过方程y"=f(x,y')的解法和方程y"=f(y,y')的解法,归纳出了方程y"=f(y')的二种解法。     

轴对称双倒易边界元法的f函数及其奇性处理

基于右端项为径基函数的三维泊松方程,推导了轴对称情况下双倒易边界元方程求和形式的 f函数通式.通过对f函数取积分平均和根据计算区域特点选取不同类型的 f函数组合,消除了f函数在对称轴上呈现奇性的不足.通过计算轴对称实心圆柱体和球体的非稳态导热问题,很好地验证了对f函数的选择和处理的可行性.     

不同浓度赤霉素处理对黄波罗花种子发芽的影响

在室内对黄波罗花种子采用不同浓度赤霉素和清水浸种试验,观测种子发芽时间,统计种子发芽数,计算种子发芽势、发芽率和发芽指数,结果表明：采用赤霉素200 ppm浸种处理对黄波罗花的发芽势、发芽率和发芽指数都有明显的提高作用;采用100~400 ppm赤霉素液浸泡黄波罗花种子的出苗率比对照都有大幅提高,以100 ppm赤霉素液浸泡黄波罗花种子的出苗率最高。     

微分方程y″=f（y′）的解法

本文通过方程y=f（x,y）的解法和方程y=f（y,y）的解法,归纳出了方程y″=f（y′）的二种解法。     

长三角与珠三角利用台资的比较研究

本文采用业绩指数及潜力指数测度方法，对长三角与珠三角利用台资的业绩与潜力指数进行了测算，通过比较分析发现：两地区均取得了较为优秀的利用台资业绩，但珠三角更为优秀；两地区利用台资潜力都还存在空间，但长三角潜力更大。对两地区利用台资业绩与潜力的比较研究，可为国家对台招商引资提供定量化决策依据，具有重要的政策启示意义。     

基于Divisia分解模型的中国能源密度变化特性及产业路径研究

Divisia指数分解是研究指标变化的重要方法.本文依据1997年至2005年间中国和11个OECD国家的主要工业产业样本数据,运用对数平均Divisia指数的分解方法,实证分析了这些国家的能源密度变化特性,解释推动能源密度变化的主要因素,并在此基础上,针对中国六个产出效果和密度效果最显著的产业,同OECD国家进行横向比较,从而确定了中国进一步降低能源密度的潜力和最佳产业路径.     

轴对称有无相变导热问题的双倒易边界元模拟

发展了轴对称问题的双倒易边界元方法.引入一个新的f函数，解决了以前使用的f 函数在对称轴上存在奇异性的问题，并成功地计算了一些非定常导热与带有运动边界条件的相变传热问题.     

发现微观世界

在距今300 多年前,就有科学家制造出了能放大200多倍的显微镜。他所展示的微观世界是什么样的呢?     

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.     

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.     

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     

Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels

<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese     

More than Skin Deep – Understand Skin Biology by Means of Dermatogenomics

<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages.