近年科技论文中网络引文的域名特征研究

以CSCD引文数据库为统计源,通过http等特征词筛选出网络引文样本,然后从顶级域名和二级域名层次分析网络引文的域名特征,理出被引频次在各级网域的分布情况,找出重点被引网域和重点被引网站,为研究人员掌握科技类网络资源的分布利用规律,锁定重点网络情报源提供帮助.     

Improving educational web search for question-like queries through subject classification

Students use general web search engines as their primary source of research while trying to find answers to school-related questions. Although search engines are highly relevant for the general population, they may return results that are out of educational context. Another rising trend; social community question answering websites are the second choice for students who try to get answers from other peers online. We attempt discovering possible improvements in educational search by leveraging both of these information sources. For this purpose, we first implement a classifier for educational questions. This classifier is built by an ensemble method that employs several regular learning algorithms and retrieval based approaches that utilize external resources. We also build a query expander to facilitate classification. We further improve the classification using search engine results and obtain 83.5% accuracy. Although our work is entirely based on the Turkish language, the features could easily be mapped to other languages as well. In order to find out whether search engine ranking can be improved in the education domain using the classification model, we collect and label a set of query results retrieved from a general web search engine. We propose five ad-hoc methods to improve search ranking based on the idea that the query-document category relation is an indicator of relevance. We evaluate these methods for overall performance, varying query length and based on factoid and non-factoid queries. We show that some of the methods significantly improve the rankings in the education domain.     

Quality assessment of answers with user-identified criteria and data-driven features in social Q&A

The purpose of the current study is to identify the user criteria and data-driven features, both textual and non-textual, for assessing the quality of answers posted on social questioning and answering sites (social Q&A) across four different knowledge domains—Science, Technology, Art and Recreation. A comprehensive review of literature on quality assessment of information produced in social contexts was carried out to develop the theoretical framework for the current study. A total of 23 user criteria and 24 data features were proposed and tested with high-quality answers obtained from four social Q&A sites in Stack Exchange. Findings indicate that content-related criteria and user and review features were the most frequently used in quality assessments, while the importance of user criteria and data features was variable across the knowledge domains. In the Technology Q&A site containing mostly self-help questions, the utility class was the most frequently used group of criteria. The popularity of the socio-emotional class was more apparent in discussion-oriented topic categories such as Art and Recreation, where people seek others’ opinions or advice. Users of Art and Recreation Q&A sites in Stack Exchange appear to place more value on answerers’ efforts and time, good attitudes or manners, personal experience, and the same taste. The importance of user features and the emphasis on answerer's expertise on the Science Q&A site was observed. Examining the connection or gap between user quality criteria and data features across the knowledge domains could help to better understand users’ evaluation behaviors for their preferred answers, and identify the potential of social Q&A for user education/intervention in answer quality evaluation. This examination also offers practical guidance for designing more effective social Q&A platforms, considering how to customize community support systems, motivate contributions, and control content quality.     

Beneficial effect of enriched air nitrox on bubble formation during scuba diving. An open-water study

Bubble formation during scuba diving might induce decompression sickness.

This prospective randomised and double-blind study included 108 advanced recreational divers (38 females). Fifty-four pairs of divers, 1 breathing air and the other breathing nitrox28 undertook a standardised dive (24 ± 1 msw; 62 ± 5min) in the Red Sea. Venous gas bubbles were counted (Doppler) 30–<45 min (early) and 45–60 min (late) post-dive at jugular, subclavian and femoral sites.

Only 7% (air) vs. 11% (air28®) (n.s.) were bubble-free after a dive. Independent of sampling time and breathing gas, there were more bubbles in the jugular than in the femoral vein. More bubbles were counted in the air-group than in the air28-group (pooled vein: early: 1845 vs. 948; P = 0.047, late: 1817 vs. 953; P = 0.088). The number of bubbles was sex-dependent. Lastly, 29% of female air divers but only 14% of male divers were bubble-free (P = 0.058).

Air28® helps to reduce venous gas emboli in recreational divers. The bubble number depended on the breathing gas, sampling site and sex. Thus, both exact reporting the dive and in particular standardising sampling characteristics seem mandatory to compare results from different studies to further investigate the hitherto incoherent relation between inert gas bubbles and DCS.     

图书馆网站满意因素微观自主评价软件的设计*

为找出图书馆网站影响用户满意的微观因素,在提出弹性化微观自主评价的思想上,设计一套自主评价软件,供各个图书馆网站机构根据自身需要,自主选择适合自己的微观评价方案,对用户满意的底层影响因素进行自行诊断。该软件是一个高度可自定义的系统,图书馆管理员可以使用系统提供的指标体系模板创建专家权重调查问卷,也可以对创建的问卷自定义,得出各级指标题的权重,同时根据该指标体系自动创建带有问题项的普通用户满意因素调查问卷。最后对用户的调查数据进行各类统计和分析,通过三维可视化图形的方式呈现给图书馆管理员,得出今后图书馆网站需要改进的各微观因素。     

强大的研究工具与知识分享的社区——Diigo

Diigo(Digest of Intemet Information,Groups and Other Stuff)是以Web2.0为平台开发出来的一款社会性软件,在美国知名的IT专业媒体CNET 2006年评出的互联网10大"最受欢迎研究工具"中,Diigo名第四.Diigo将社交网络、社会化书签、为网页添加高亮以及评注等众多功能相结合,帮助人们发掘、保存和共享信息.文章从"个人在线研究工具"、"知识分享与合作研究的平台"、"构建个性化网络资源环境的方法"三个方面对Diigo进行介绍.     

湖北省期刊网站建设的现状与特点

对湖北省期刊网站建设情况进行较为全面的调查,重点考察独立网站总体分布情况、网站栏目设置情况及内容数字化情况。通过分析比较,指出目前湖北省期刊网站建设的特点,同时给出加强数字化建设的建议。     

美国中学图书馆网站建设与启示

论文在调研我国中学图书馆网站建设的基础上,分析了美国12所中学图书馆网站在书目检索、电子资源、导航系统等方面的特点,提出资源建设及网站共享、重视社会及读者参与等若干建议,以期为我国中学图书馆的网站建设提供借鉴。     

Ajax在Web系统中的应用

Ajax是一种新兴的Web表示层技术,利用它可以构建动态、快速和灵活的Web应用程序。Ajax可以消除传统HTYP通信模式中对表单的依赖,从而实现快速而轻量的异步通信。     

从字序看《论衡》反义相成词的构成

从字序角度看,《论衡》中有一部分反义相成词是同词素异字序的,它们可区分为两类:一是字序AB式和字序BA式在《论衡》中同时出现的;二是与现代汉语中的AB式相比,在《论衡》中只有BA式的。它们的特点应该引起研究者的注意。