基于Lucene技术的全文检索网络教学系统的研究与设计

在网络教学平台加入定制的Lucene全文搜索引擎,实现了针对各种类型教育资源的全文索引/检索功能。通过在网络教学平台上的应用测试,证明了在网络教学平台上构建一个全文检索引擎是成功的,可以对网络教学平台站内网页中各种教学资源进行全文检索。     

Effect of verbal instructions and image size on visual search strategies in basketball free throw shooting

We assessed the effects on basketball free throw performance of two types of verbal directions with an external attentional focus. Novices ( n = 16) were pre-tested on free throw performance and assigned to two groups of similar ability ( n = 8 in each). Both groups received verbal instructions with an external focus on either movement dynamics (movement form) or movement effects (e.g. ball trajectory relative to basket). The participants also observed a skilled model performing the task on either a small or large screen monitor, to ascertain the effects of visual presentation mode on task performance. After observation of six videotaped trials, all participants were given a post-test. Visual search patterns were monitored during observation and cross-referenced with performance on the pre- and post-test. Group effects were noted for verbal instructions and image size on visual search strategies and free throw performance. The 'movement effects' group saw a significant improvement in outcome scores between the pre-test and post-test. These results supported evidence that this group spent more viewing time on information outside the body than the 'movement dynamics' group. Image size affected both groups equally with more fixations of shorter duration when viewing the small screen. The results support the benefits of instructions when observing a model with an external focus on movement effects, not dynamics.     

浅谈Internet与化学

随着信息高速公路的发展 ,Internet与化学研究、教学的联系日益紧密 ,本文从Internet所提供的几种主要服务入手 ,简要地介绍了化学工作者如何利用Internet进行国内、国际间学术的交流和讨论 ,以及因此而给化学研究、教学带来的巨大推动力     

国外网络教学资源的发掘研究

论文提出了围绕线索深度挖掘,从而找到高质量国外网络教学资源的方法:即了解国外网络教学资源的各种特征,选择合适的搜索引擎作为检索工具,结合搜索引擎的高级语法,对初步检索结果进行分析推理。     

Webometric research with the Bing Search API 2.0

In May 2011 the Bing Search API 2.0 had become the only major international web search engine data source available for automatic offline processing for webometric research. This article describes its key features, contrasting them with previous web search data sources, and discussing implications for webometric research. Overall, it seems that large-scale quantitative web research is possible with the Bing Search API 2.0, including query splitting, but that legal issues require the redesign of webometric software to ensure that all results obtained from Bing are displayed directly to the user.     

自然语言处理在信息检索中的应用研究

在网络信息检索发展的过程中,研究者们不断尝试着将自然语言处理应用到网络信息检索里,希望能为检索效果提高带来帮助。本文介绍自然语言处理的相关技术和方法;然后提出面向用户的查询扩展统计模型中的用户兴趣模型;分析了中文自然语言处理在网络信息检索中的应用。     

Relational messages associated with nonverbal involvement,pleasantness, and expressiveness in romantic couples

Previous research suggests that individual nonverbal cues and cue complexes communicate multiple relational messages simultaneously. This work examines the contention that nonverbal percepts may predict relational message interpretations in romantic relationships. Results provide support for the hypothesis that nonverbal cues indicative of greater involvement, pleasantness, and expressiveness connote messages of intimacy. Specifically, the current study reveals that perceptions of intimacy and composure are associated with greater vocalic involvement. Interpretations are provided in line with the social meanings model.     

Black Studies Scholarship and Its Coverage in Thomson Reuters’ Web of Science

This study analyzes the coverage of black studies journals as compared to women's studies journals in Web of Science, Academic Search Complete, and ArticleFirst. This study also examines black studies bibliographies and directories to identify journals that are suitable for inclusion in Journal Citation Reports and consequently Web of Science and evaluates seven black studies journals using the Thomson Reuters journal selection process.     

Google Book Search and Metadata

This article summarizes published documents on metadata provided by Google for books scanned as part of the Google Book Search (GBS) project and provides suggestions for improvement. The faulty, misleading, and confusing metadata in current Google records can pose potentially serious problems for users of GBS. Google admits that it took data, which proved to be inaccurate, from many sources and is attempting to correct errors. Some argue that metadata is not needed with keyword searching; but optical character recognition (OCR) errors, synonym control, and materials in foreign languages make reliable metadata a requirement for academic researchers. The authors recommend that users should be able to submit error reports to Google to correct faulty metadata.     

From Google Print to Google Book Search: The Controversial Initiative and Its Impact on Other Remarkable Digitization Projects

Google's initiative to scan and add book content into its search engine has resulted in much praise and protest. Changing its digitization project's name from Google Print to Google Book Search and adding information to its site did not keep Google out of copyright court. However, publicity surrounding this project has spawned renewed interest in book digitization projects, with collaborative efforts quickly growing. This article will look at Book Search's history, highlight how it has been altered along with its name, and point out other interesting book digitization projects that Book Search has spawned or recently brought into the limelight, such as those associated with the Internet Archive.