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While everyone's attention is fixed on Microsoft versus DOJ, the really important contest is taking place amongst the telco, telecommunications and software giants. Because most IP data travels over long-haul lines, the Internet is actually the telephone companies. Who owns the telephone companies? The Telecommunications Act of 1996 actually puts ownership of the Internet up for grabs. The paper considers how the Act has put traditional telephone companies in danger of extinction. Powerful US computer companies continue to buy up the main hardware and software lines connecting countries and continents to the emergent private Internet. Most telecom companies throughout the world have reacted too slowly to IP. Their sluggishness will be their ruin 相似文献
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Are bloggers’ topical coverages related to their contributions, impacts, and publishing styles in the blogosphere? We investigated this question by grouping bloggers on the basis of their topical coverages and comparing their publishing behaviors. From a blog website with more than 370,000 posts, we first identified two types of bloggers: specialists and generalists. Then we studied and compared their respective publishing behaviors in the blogosphere. Our analysis suggested that bloggers with different topical coverages do behave in different ways. Specialists generally make more contributions than generalists. Specialists also tend to publish more on weekdays, during business hours, and on a more regular basis. We also revealed that specialists also have different publishing behaviors, with only a small fraction creating a large “buzz” or producing a voluminous output. As blogs start to gain more business value, an extensive analysis like ours can help various stakeholders in the blogosphere maximize their share of the value chain. 相似文献
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Emmanuel Lochin Bruno Talavera 《Engineering Applications of Artificial Intelligence》2011,24(1):77-86
The behaviour of the TCP AIMD algorithm is known to cause queue length oscillations when congestion occurs at a router output link. Indeed, due to these queueing variations, end-to-end applications experience large delay jitter. Many studies have proposed efficient active queue management (AQM) mechanisms in order to reduce queue oscillations and stabilize the queue length. These AQM attempt to improve the random early detection (RED) model. Unfortunately, these enhancements do not react in a similar manner for various network conditions and are strongly sensitive to their initial setting parameters. Although this paper proposes a solution to overcome the difficulties of configuring the RED parameters by using a Kohonen neural network model; another goal of this study is to investigate whether cognitive intelligence could be placed in the core network to solve such stability problem. In our context, we use results from the neural network area to demonstrate that our proposal, named Kohonen-RED (KRED), enables a stable queue length without complex parameters setting or passive measurements to obtain a correct configuration. 相似文献
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This article analyzes what presently constitutes one of the most problematic aspects of search engines' and Internet archives' practices: the protection of personal data and copyrighted material. These issues are often sidelined in favour of the quickest possible development of ever more fashionable e-services. Yet the lack of consideration for these issues may hinder the development of various e-services as all kinds of legal claims and suits may be brought against service providers, particularly in the European Union, which is fond of drafting complex legislation in the field. This paper shows how typical search engines and Internet archives work and the legal issues to which their practices give rise. The examples used are Google and Internet Archive, and their policies. It is argued that many of the legal checks and balances they offer with respect to the protection of personal data and copyrighted material leave a great deal to be desired. The article concludes by providing a short list of possible remedies that could, at least provisionally, alleviate some of the most urgent problems. 相似文献
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Learning Management Systems (LMS) are web-based systems allowing instructors and/or students to share materials and interact online. This study compared differences in LMS use between instructors and students at a large residential campus with students at a smaller commuter campus. Responses to an online survey about LMS activities and tools were categorized by three different interaction types: Learner–Instructor (LI), Learner–Content (LC), and Learner–Learner (LL). Aggregated log data was also analyzed to see if students’ use was consistent with their beliefs. Respondents from both campuses rate highly all activities and tools within the LMS. Findings suggest that residential students value activities and tools supporting LC interaction more than commuter students, while commuter students value activities and tools fostering LL interactions more than residential students. The aggregated log data was consistent with the survey data showing a higher level of activity in the most heavily used LC-oriented tools for the residential campus and higher activity in the LL-oriented tools for the commuter campus. 相似文献
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学籍档案管理是高校教育教学的重要组成内容。通过分析学籍档案的形成规律和特点,力图运用档案管理系统,借助信息技术和网络技术,利用著录模板设置和数据导入功能,构建现代化学籍档案管理模式。促使学籍档案归档科学、管理规范、利用充分,实现归档部门负责信息的真实性、完整性,档案部门确保信息的安全性、有效性,更好地为高校、个人以及社会服务。 相似文献
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Michael Milway Ian Gorton John Fulcher Alex Zelinsky 《Microprocessors and Microsystems》1990,14(10):644-652
Two approaches to interfacing transputers to external circuitry are considered. The design and construction of both a serial and a parallel interface for transputers is described. These enable transputers to communicate with peripherals via the standard Inmos transputer links. A Motorola MC68701 8-bit microcomputer, serving as a programmable I/O controller, is incorporated into both interfaces. This solution lends a high degree of flexibility into the interface design, and can be used with any transputer board which has spare links available at edge connectors. Finally, two control applications are briefly described which utilize the interfaces. 相似文献
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手机上网成以后互联网发展的重要趋势 总被引:1,自引:0,他引:1
《办公自动化》2011,(1):17-17
<正>未来十年的商业热点是什么?这是投资圈子里最为诱惑的商业命题,因为你如果看准了趋势,那就意味着未来丰盛的收益回报。零八年,中国互联网信息中心在《第22次中国互联网发展状况统计报告》中已经指出,到零八年上半年,中国网民的数量已经达到2.53亿,那时候的网民已经超过了美国,位于世界第一位。同时宽带网民数量和CN域名注册量都居全球 相似文献
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移动自组网(MANET)是由高度自主的移动节点组成的临时性自治系统,当其通过基于双向路由的AODV协议与Internet互联时,单向链路的克服是一大难题.通过改进AODV协议中的HELLO机制,可在维持较低网络整体开销的同时维持较好互联性能.用NS2进行的仿真结果显示,提出的方案切实可行. 相似文献