浅谈p2p流媒体技术在网络教育中的应用

随着计算机网络的飞速发展,应用P2P流媒体技术的网络学习是人们接受教育的新方法,同时也使得网络教育的成本能够降低。本文介绍了P2P的概念,流媒体技术以及基于P2P的流媒体技术,并论述了其在网络教育中的应用。     

多媒体与流媒体技术在教学中的对比与探讨

流媒体技术的应用使得网络教学注入了新的活力,它不仅能够实现异步教学,而且能够实现具有实时交互功能的同步教学。文章阐述了多媒体教学与网络流媒体在教学方法和手段上的差别,重点介绍了网络环境中的流媒体技术在教学中的应用。提出了如何实现基于Windows Media技术平台的教育系统。     

基于流媒体技术的现代远程教学系统设计综述

现代远程教育教学是现代信息技术与教育技术的完美融合，是学习型社会开放、灵活的一种新型教学模式。基于流媒体技术的现代远程教学系统弥补了远程教育中多媒体信息传输的诸多不足。文章介绍了现代远程教育的相关概念和流媒体技术的相关知识，给出了基于流媒体技术的现代远程教育教学系统设计基本框架，展示了基于流媒体支持下远程教学发展趋势。     

流媒体技术在数字化信息传输中的应用

流媒体技术是网络环境中的一种新的媒体传输形式．有着广阔的应用前景。本文探讨了流媒体技术的原理、系统组成及实现流媒体技术的相关协议．介绍了流媒体技术的应用．特别对流媒体技术在数字化图书馆中的应用做了详细阐述。     

流媒体技术的在网络教学中的应用初探

阐述流媒体技术的基础、流媒体系统的构成、流媒体的文件格式、流媒体的主要技术方案和流媒体技术在网络教学中的应用,以期对流媒体技术与现代网络教学的开展作一些初步探讨。     

流媒体技术的在网络教学中的应用初探

阐述流媒体技术的基础、流媒体系统的构成、流媒体的文件格式、流媒体的主要技术方案和流媒体技术在网络教学中的应用,以期对流媒体技术与现代网络教学的开展作一些初步探讨.     

流媒体技术在客服中心录音系统中的应用

随着网络的飞速发展,流媒体技术被广泛应用,目前,流媒体技术被广泛应用于网络。流媒体技术的使用,克服了长时间下载这一困难,应用流媒体,就可以一边下载一边进行观看,使网络传输音频、视频困难的局面得到了很好的改善。流媒体也可以应用于客服中心的录音系统之中,本文就流媒体技术在客服中心录音系统中的应用进行浅谈。     

浅谈流媒体技术在高等教育远程教育教学中的应用

多媒体与网络技术的飞速发展,产生了新型的传播媒体--流媒体.流媒体的出现彻底改变了传统因特网只能表现文字和图片的缺陷,它集音频、视频及图文于一体,使之成为未来因特网应用的主流.介绍了流媒体技术的基本原理,论述了流媒体技术在高等教育应用中的技术优势,并介绍了流媒体技术的教学特点以及它在高等教育远程教学中的应用.     

流媒体技术在远程教学中的应用

流媒体技术被称为即时观看的技术,流媒体越来越普及,文章介绍了流媒体技术及其在构建现代远程教育系统中的推动性的作用。     

流媒体应用研究

本文在介绍流媒体技术的概念和特征的基础上,重点分析目前基于互联网的主要流媒体技术,就视频直播、视频点播等技术的应用进行分析,对流媒体技术的未来发展趋势和主要应用领域做了详细阐述,促进人们对流媒体技术的进一步认识,从而推动流媒体技术在更广泛的层次上得到应用和发展。     

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.