数字图书馆的Google之道

Google正在改变用户查询信息的模式,并同数字图书馆展开竞争。Google与数字图书馆相比,虽在某些功能方面有优势,但数字图书馆仍然有很大的发展空间。图书馆员应学习Google的经验,使用其技术来改善自身服务,包括利用Google开展参考咨询,加强与用户的交流互动;向搜索引擎公开元数据,以提高其使用率和社会效益;出版商协作发展本地集成的信息服务;建立同Google的“竞争合作”关系。     

How Google Uses Metadata to Improve Search Results

This article critically examines four Google search products (Google Advanced Search, Google News Advanced Search, Google Books Advanced Search, and Google Advanced Scholar Search) and shows how each uses metadata to enhance or improve search results. In addition, the article shows how metadata can increase search precision and recall in information discovery systems. From a library perspective, this article analyzes some of the metadata-enabled features of Google's advanced search pages and compares these features to those found in a typical online library catalog. From a serials perspective, Google News Advanced Search demonstrates how Google indexes news websites, sites that are essentially continuing resources. As Google incorporates more and more metadata functionality into its advanced search pages, they increasingly begin to function more like online library catalogs and less like search pages found in a traditional Internet search engine. The simple search box has many limitations, and like libraries, Google is increasingly creating and offering metadata-enabled search features that improve search precision and recall in its products.     

Using Metadata to Discover the Buried Treasure in Google Book Search

ABSTRACT

Google Book Search presents an opportunity to search millions of books from the Google Library partners and publishing partners. How does metadata compare in Google Book Search and library catalogs?     

从Google Alert谈提醒服务在数字图书馆的实现

在Google基础上开展服务的Google Alert的出现，引起了人们对提醒服务的注意，也为数字图书馆真正实现信息个性化推送服务提供了一个成功的范例。本文在介绍Google Alert的基础上，以新书通报为例探讨了提醒服务在数字图书馆的实现及实现过程中需注意的问题。     

An Integrated Spatial Search Engine for Maps and Aerial Photographs on a Google Maps API Platform

A traditional library catalog does not do justice to maps and aerial photographs. Text can never fully describe them and maps' and aerial photographs' geographic coverage or perimeters cannot be displayed visually in the online public access catalog (OPAC), so searching based on their textual metadata without specific spatial reference data used also for display purposes is often not enough to locate relevant items. The Hebrew University of Jerusalem's (HUJI) Geography Department has developed a spatial search engine for their scanned aerial photographs collection that allows users to locate one or more aerial photographs according to the area of the Earth's surface that was photographed and their accompanying metadata. The Humanities and Social Sciences Library, which holds a large unscanned print map collection, has asked to integrate a similar map search mechanism in the Department's existing search engine, and a new website was launched in December 2015 (http://ccg.huji.ac.il/aerialphotos/) showing the aerial photographs' center points alongside the maps' rectangle perimeter. The search engine retrieves maps and aerial photographs that intersect with a user-drawn rectangle. This article discusses the characteristics of these collections, the rationale behind searching for maps and aerial photographs together, and the process of defining and building this spatial search engine. This method allows users to view which items are available in their area of interest side-by-side, on a Google Maps background map.     

PageRank算法的原理简介

在介绍PageRank算法基本思想、基本公式和计算实例的基础上,介绍如何利用PageR- ank算法提高网页PR的方法,最后指出PageRank算法存在的不足,并对其发展趋势进行分析。     

Google Scholar对MEDLINE数据库的检索性能测评

文章以Google Scholar检索MEDLINE数据的检索结果和PubMed的检索结果进行对比分析,以帮助用户正确认识使用Google Scholar.     

Google搜索引擎及其技术简介

搜索引擎已经成为人们网络：生活必不可少的工具，因此，国内外的各种搜索引擎纷纷出现。而Google搜索引擎以其雄厚的技术为支撑，凭借其强大的检索功能和高质量的检索服务，逐渐吸引和留住了世界各地的大量网民，成为了世界上最著名的搜索引擎之一。本文在介绍Google基本概况、检索特色及特色功能的基础上，介绍了其核心技术及工作机理，最后对其发展趋势作了分析。     

OAI-PMH Harvested Collections and User Engagement

ABSTRACT

Discovery tools are used in libraries to bring together books, articles, and other resources. Research has focused on user and librarian evaluation of these tools, but there are few evaluations of non-book and non-article sources. Discovery tools can also include metadata for local collections harvested through the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). Creating these harvests can be time consuming for staff, so it is important for libraries to understand if and how patrons use these records. The University of Nebraska-Lincoln Libraries (UNL Libraries) harvests metadata from local collections into the Encore discovery tool. A study was conducted to analyze patron use of OAI-harvested records. This study analyzed usage data for harvested collections obtained from different discovery sources and referrals through Encore. Google Analytics was used to evaluate searcher behavior differences between content referred through Encore and other referrals. Although discovery through Encore did not result in high numbers of traffic, there is evidence that patrons who discover records through Encore take more time looking through records than patrons using other discovery methods. This increase in time is a measure of engagement and may be reason enough for libraries to consider adding OAI-harvested collections to their discovery tool.     

图书馆信息服务和搜索引擎的跨界合作

从以网络为中心的信息服务出发，分析图书馆信息服务与搜索引擎跨界合作的技术框架，从信息资源、图书馆员和服务时空3个方面对信息服务进行分析，结合谷歌地图，归纳数据合作、系统合作等跨界合作的具体方法和流程，以及跨界合作中知识产权、应用模式方面的难点，最后总结跨界合作对图书馆信息服务在信息集成、个性化服务方面的启示。     

Google衍生网络服务概览

平常在使用Google的产品时,我们接触到最多的是Google搜索引擎,其实Google除了搜索引擎服务之外,还提供有其他领域很多实用的网络服务,本文就常用的一些Google衍生网络服务作简单介绍.     

图书馆人看Google

Google重视将企业使命与社会责任相统一,以满足用户信息需求为目标;以简洁、易用、快速、稳定的网上免费信息服务赢得用户信赖;以丰富多彩的产品及服务赢得用户的推紫,同时也改变了传统上人们通过图书馆获取信息的习惯、动摇了图书馆作为社会信息门户的地位,图书馆应反思和吸取Google的精华以积极应对。     

Google和百度两种搜索引擎比较研究

从索引数据库、信息检索功能和检索结果等方面对两种著名的搜索引擎Google 和百度进行了详细比较，为用户更好地利用搜索引擎提供参考。并提出两者有待进一步完善的技术建议。     

Google Answers及其对图书馆工作的启示

Google Answers是Google推出的一项新服务。它将传统图书馆参考咨询服务技术有机的运用到网络中去并得到了用户的广泛好评。论文通过介绍Google Answers的相关工作流程并将Google Answers与传统参考咨询进行对比，以期得到对当前图书馆事业发展的一些启示。     

Google率先打造新一代搜索引擎

第一代搜索引擎注重网站自身的特征分析,第二代搜索引擎注重网站间的链接关系分析,都缺乏对终端用户使用互联网情况的分析。Google通过Toolbar产品,实现用户使用互联网情况的统计分析,标志其进入新一代搜索引擎的行列。     

Measuring Law Library Catalog Web Site Usability: A Web Analytic Approach

ABSTRACT

Although there is a proliferation of information available on the Web, and law professors, students, and other users have a variety of channels to locate information and complete their research activities, the law library catalog still remains an important source for offering users access to information that has been evaluated and cataloged by experts. The usability of the catalog needs to be effectively measured before any necessary improvements can be made. This study was undertaken to investigate the information retrieval patterns of users of the Rutgers Law Library Online Public Access Catalog and to develop the catalog into a more effective search tool for these users. This study used an experimental approach to measure the usability of our catalog by analyzing the transaction logs from the OPAC system and the results from Google Analytics. The findings provided not only important information on user demographics and their computer systems, but also more insight on the search behaviors of users. The specific findings included the following:

1. As a Web-analytic tool Google Analytics provided extensive information on the OPAC and the navigational behaviors of users.

2. Fifty-eight percent of our users visited the Web site regularly.

3. The most popular search method, which was employed by 37% of our users, was by title.

4. Most patrons used computer systems with a high resolution and color depth monitor and visited the catalog Web site with a high-speed Internet connection.

5. Suggestions were made by the authors to improve the users’ search experience of the catalog Web site.

This study is significant to libraries with Web catalogs because it demonstrates the potential value of using Google Analytics as a Web analytics tool in combination with the OPAC transaction logs to measure catalog usability.     

Value-based metadata quality assessment

This article proposes a method that allows a value-based assessment of metadata quality and construction of a baseline quality model. The method is illustrated on a large-scale, aggregated collection of simple Dublin core metadata records. An analysis of the collection suggests that metadata providers and end users may have different value structures for the same metadata. To promote better use of the metadata collection, value models for metadata in the collection should be made transparent to end users and end users should be allowed to participate in content creation and quality control processes.     

用Delphi和Google Web API开发自己的搜索引擎

简述Delphi是Google Web API提供的一种Web服务，允许开发人员选择自己喜爱的编程语言开发应用程序，通过基于XML的SOAP信息交换协议与远程的Google服务器连接来调用Google的Web服务；通过实例详细介绍用Delphi和GoogleWeb API开发搜索引擎的方法和步骤。