基于MAS的移动学习中设备自适应的研究

移动学习就是通过移动设备可以在任何时间任何地点进行的学习[1][2][3];然而移动设备间的差异性很大,处理平台的异构性使不同的移动设备支持不同课程资源显示格式。为了使移动设备可以象PC机一样获取网络课程资源,适应异构的移动计算环境,本文利用Agent技术建构了智能的自适应系统模型。他可以自动转换资源的格式,识别移动设备的性能。     

挑战极端环境

珠穆朗玛峰、马里亚纳海沟、南极、阿齐济耶沙漠和国际空间站,这些毫不相干的地点有一个共同点,它们都属于极端环境。即使有最先进的科技设备做辅助,人类还是完全没有能力在某些极端环境下生存,即便那些具备超强适应能力的人。     

浅论网络隐私权的法律保护

一、互联网环境下个人隐私权的概述(一)互联网环境下个人隐私权的定义作为二十世纪最伟大的发明之一,互联网的出现,一方面极大地改变了人们的生活方式,给人际交往带来便利,使得阻碍人与人之间交流的空间、时间因素的影响逐渐变小。而另一方面,网络技术的迅速发展,也使得人们的大量隐私信息暴露于互联网环境下,各种主体诸如网络供应商以及其他组织和个人对公民隐私权的侵犯也日趋严重。对网络隐私权的保护也日趋被法学专家予以重     

无线网络发展状况

近年来,随着个人数据通信的发展,功能强大的便携式数据终端以及多媒体终端得到了广泛的应用。为了实现使用户能够在任何时间、任何地点均能实现数据通信的目标,要求传统的计算机网络由有线向无线、由固定向移动、由单一业务向多媒体业务演进,由此无线网络技术得到了快速的发展。在互联网应用快速普及的今天,无线网络技术已成为通信发展的重要新兴领域。无线技术使得人们使用品种广泛的设备在世界任何位置访问数据的愿望成为可能。     

为电池充电加速

笔记本电脑、数码相机、手机等移动设备的出现大大地方便了我们的生活。但这些设备往往对电池有着很高的要求,给它们充电就成了一件很麻烦的事,因此人们一直在寻求减少充电时间的办法。     

关于Flex技术的移动平台GIS应用的探讨

随着近年来移动技术的飞速发展,智能化的移动设备层出不穷。这些设备在人们的生活和工作中进行运用,成为了人们生活不可分割的一部分。随着应用范围的扩大,基于移动设备的各种应用也开始大量的出现。从移动设备的实际利用来看,其应用受平台操作系统的影响比较大,所以往往会导致开发和部署方式的差异。目前,一些技术在不同的平台上其应用价值也不一样,所以本文针对性的进行基于Flex技术的平台GIS应用探讨,旨在强化技术分析,从而为移动GIS系统的开发提供新的思路。     

一种基于NS2的移动Agent仿真系统

移动Agent系统的设计和实现需要仿真系统的支持。在分析网络仿真工具NS2基础上,应用成熟的移动Agent工具IBMAglets,实现了一个基于NS2的移动agent仿真系统。系统实现了对网络传输延迟和移动Agent处理操作延迟的仿真。     

浅谈移动用户界面设计

如今时代,移动终端迅速发展,不管是个人生活还是工作学习,人们渐渐离不开移动终端上的各种资讯各种应用,手机、笔记本、平板电脑、POS机甚至包括车载电脑等等不同的移动硬件设备也频繁发行新版本新功能。我们正在走向真正的移动信息时代,这不仅仅得益于乔布斯的创意,也得益于网络技术的宽带化和硬件的高集成度。移动用户界面区别于传统的互联网界面,也正在呈现一些它独特的东西。     

关于手机与移动互联网技术的影响分析

在信息技术飞速发展的当下,带动了网络技术的进步,因此,移动互联网技术被应用在网络技术中,应用的效果十分明显。其中,移动互联网和移动设备相互配合,进而形成了现代化的移动互联网络的平台。近年来,移动设备的种类不断增加,同时推陈出新,使得移动互联网在互联网络中的作用不断突显出来。在各种各样的移动设备中,手机获得了大众的认可与好评,并且逐渐成为了网络服务有效实现的关键手段。通过对移动互联网的发展,深入研究并分析了手机与移动互联网的重要影响。     

基于Java语言的电子邮件系统的实现

现在社会的不断发展,对现在网络技术的需求也出现了新的改变。在过去的信息传递之间往往是通过信件进行传递,信件进行传递的过程中会使得消息的获知时间出现延迟,因此在这样的技术上发明电子邮件系统就显得格外重要。但是在人们思维的不断发展的过程中电子邮件方面也出现了新的改变,这种改变在很大的程度上使得电子邮件的发展更进了一步。这种方法是对Java语言和JavaMail API进行了相关的讨论,使得这种结构与电子邮件之间有一个紧密的结合,进一步使得我国的电子邮件行业可以得到更好的发展。     

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.