浅析美欧公共电视发展的法律环境     

冯亚兵  王丽雅 《国际新闻界》2006,(7)

本文讨论的是美国民营公共电视机构所处的法律环境,以及欧盟各国对公共电视发展的法律支持,旨在提供对国外公营广电的基本了解。  相似文献   

社会网络模式下的Web2．0电子商务   总被引：9，自引：0，他引：9  

纪翔 《图书情报知识》2006,(4):94-97

本文介绍了当前处于热点的社会网络软件(SNS)的出现、发展和国内外社会网络(SN)的现状,提出了一种基于博客 SN的企业专区电子商务模式,并展望了其应用前景。  相似文献   

‘The feeling of exclusion’: Young peoples' perceptions of art galleries     

David D.M. Mason  Conal McCarthy 《Museum Management and Curatorship》2006,21(1):20-31

This article first looks at the relationship between museums and art galleries and their potential audiences and, in particular, the under-represented sector of young visitors. It examines the main findings from the limited research available on young visitors, and goes on to discuss theories delineating the differences between the cultures, identities and values of culture consumers and culture providers. The second part of the article looks at what specific museums have done towards being more inclusive in their appeal, and then reports the findings of a survey of young people in relation to New Zealand's Auckland Art Gallery. The survey found that young people's ideas of what constitutes modern, relevant art do not match standard art criteria, and that most exhibitions and marketing methods do not mesh with their worldview. The article concludes by using data from the survey to suggest ways of engaging more young people with public art galleries.  相似文献   

Analysis of the urban/rural broadband divide in Canada: Using GIS in planning terrestrial wireless deployment   总被引：3，自引：0，他引：3  

M. Sawada  Daniel Cossette  Barry Wellar  Tolga Kurt 《Government Information Quarterly》2006,23(3-4):454

Millions of Canadians residing in Canada's northern, isolated, rural, and remote communities do not have broadband Internet access. This situation has led to a national “broadband divide.” That is, the deployment of wireline broadband is very limited in Canada's northern, isolated, rural, and remote areas because of the significant expense of installation and maintenance of the wired infrastructure needed to reach dwellings in these locations.Terrestrial broadband wireless technology, on the other hand, does not entail the same kind of physical infrastructure. As a result, there are dramatic changes in how spatial considerations affect the provision of broadband Internet services (BIS) to areas beyond the urban zone. In particular, the spatial question is now focused on assessing the capacity for different technological solutions to reach profitable population bases, and brings to the forefront organizations that are developing non-line-of-sight (NLOS) technologies that would permit wireless Internet access over much greater distances than current solutions.We begin this paper by establishing the importance of broadband connectivity to Canada's northern, isolated, rural, and remote communities. This discussion comments on the role of the Government of Canada in the provision of broadband connectivity to residents of these communities, and outlines the current regulatory issues that govern wireless services and policy formulation.The second part of the paper illustrates the use of geographic information system (GIS) approaches in the study of wireless broadband planning and deployment. Case study findings suggest that GIS applications can make a significant contribution to the analysis of wireless deployment planning, to the understanding of the relationships between wireless signal sources and consumers, and to the spatial configuration of terrestrial wireless broadband networks. We conclude the paper by discussing how the GIS approach employed could be used to inform the public policy process with regard to increasing access to broadband Internet services in all regions of the country, and thereby providing the opportunity for all Canadians, regardless of location, to fully participate in the Information Society.  相似文献   

Anonymous personalization in collaborative web search   总被引：2，自引：0，他引：2  

Barry Smyth  Evelyn Balfe 《Information Retrieval》2006,9(2):165-190

We present an innovative approach to Web search, called collaborative search, that seeks to cope with the type of vague queries that are commonplace in Web search. We do this by leveraging the search behaviour of previous searchers to personalize future result-lists according to the implied preferences of a community of like-minded individuals. This technique is implemented in the I-SPY meta-search engine and we present the results of a live-user trial which indicates that I-SPY can offer improved search performance when compared to a benchmark search engine, across a variety of performance metrics. In addition, I-SPY achieves its level of personalization while preserving the anonymity of individual users, and we argue that this offers unique privacy benefits compared to alternative approaches to personalization.  相似文献   

基于概率神经网络的文本自动分类研究   总被引：10，自引：2，他引：10  

施洁斌 《情报学报》2004,23(2):147-151

本文提出了将一种径向基网络的重要变形———概率神经网络应用于文本自动分类的研究 ,与常用的K 最邻近法相比 ,具有一定的优势 ,特别是在训练集中各类的训练样本数很不平衡时 ;与BP等其他神经网络相比 ,其特点是需调节的参数少 ,不需确定隐层数、隐层中的神经元数量等网络结构 ,比较容易使用。此外 ,从研究中的不同特征选择的评价函数来看 ,它们对分类有一定的影响 ,应用X2 统计进行特征选择的分类正确率最高 ,其次是文本证据权 ,而期望交叉熵的效果最差 ,说明特征选择在文本自动分类中也是非常重要的。  相似文献   

网络环境下数字图书馆的安全与防范措施   总被引：14，自引：0，他引：14  

邓少雯 《图书馆论坛》2004,24(4):106-108

阐述了网络环境下影响数字图书馆安全的因素，提出了保护数字图书馆信息安全的防范措施。  相似文献   

决策支持技术在电子政务中的应用*——以大社保领域为例      总被引：1，自引：0，他引：1  

金莹  邓三鸿  李勇 《现代图书情报技术》2004,20(9):66-69

不同的电子政务系统需要特定的决策支持系统，本文以大社保领域为例，介绍了电子政务系统引入决策支持技术的必要性，详细讨论了社会保障决策支持系统的内容和目标，同时还阐述了决策支持技术在大社保领域的应用研究中需要解决的关键性问题。本文从实际应用的角度出发，给出了一个较为完整的社会保障的决策支持系统的解决方案。  相似文献   

对开展社会科学成果查新研究的探讨   总被引：4，自引：0，他引：4  

许家梁刘彦庆  褚衍昌 《津图学刊》2004,(3):4-6,29

本文认为，国内现有的自然科学成果查新机构无法适应社会科学成果查新需要，建立全国性社科成果查新体系势在必行。为此，需要开展相关的社会科学成果查新研究。本文对开展社会科学成果查新研究的背景、意义、内容和方法进行了探讨。  相似文献   

“公共图书馆精神”的科学解读   总被引：27，自引：1，他引：27  

王宗义 《中国图书馆学报》2004,30(5)

“公共图书馆精神”是近代图书馆活动中提炼出来的职业道德基础之一。机械地移植外来的社会文化制度,仅从字面上理解公共图书馆精神,是导致我国公共图书馆活动缺少社会认同的主要原因。需要把公共图书馆活动和相应的社会文化制度放到相关的社会环境中去考察,认识这一社会文化活动的原始运作模式,进而科学地解读“公共图书馆精神”和社会文化制度,为图书馆活动和科学研究提供一个理性的基础。参考文献4。  相似文献