基于信息网格的数字图书馆研究

讨论了信息网格和数字图书馆之间的关系、应用以及构建基于信息网格的数字图书馆的关键技术,并给出了基于织女星信息网格的数字图书馆体系结构。     

An experimental analysis of digital video library servers

Much work on video servers has concentrated on movies on demand, in which a relatively small number of titles are viewed and users are given basic VCR-style controls. This paper concentrates on analyzing video server performance for non-linear access applications. In particular, we study two non-linear video applications: video libraries, in which users select from a large collection of videos and may be interested in viewing only a small part of the title; and video walk-throughs, in which users can move through an image-mapped representation of a space. We present a characterization of the workloads of these applications. Our simulation studies show that video server architectures developed for movies on demand can be adapted to video library usage, though caching is less effective and the server can support a smaller user population for non-linear video applications. We also show that video walk-throughs require extremely large amounts of RAM buffering to provide adequate performance for even a small number of users.     

数字图书馆中图编码匿名方法

现如今数字图书馆所发布的大部分数据只包含图书资源的相关信息,并没有用户属性与图书资源共同发布的数据,使得分析者不能从现有发布数据中分析出更多的信息,对有些科学研究造成困扰。建立一种用户属性与图书信息共同发布的匿名方式,首先将所有图书使用图书分类号进行重新编码,其次根据重新编码的稀疏情况将整个数据进行划分,最后在每个划分中使用置换方法进行匿名。实验结果表明,最终匿名表的数据具有较高的准确性和实用性,并能够通过散点图的方式直观地看到属性间的关系,为科学研究提供更多有用信息。     

An integrated architecture for the provision of health telematic services based on digital library technologies

monolithic information system to effectively serve the needs of an entire healthcare organizational structure. Thus, information and telecommunications systems must primarily provide the infrastructure to support the effective integration of distributed and heterogeneous components, ensuring overall integrity in terms of functional and information interworking. This approach i.e., the integration of heterogeneous autonomous distributed systems, to developing and managing regional healthcare networks ensures the transfer and integration of consistent information between healthcare facilities, without imposing constraints on the operation of individual clinical units. This paper presents the results of an ongoing effort for the design and implementation of an architecture based on digital library technologies, for the provision of user-oriented telematic services in a regional healthcare network. Specifically, it addresses issues related to the provision of user-oriented services, transparent to the needs of different user groups and the requirements of specific tasks, based on: a) meta-information for the creation of an information infrastructure for the regional healthcare network which is, effectively, a multimedia distributed digital library, b) intelligent informationretrieval strategies to selectively retrieve information from multimedia data, c) agent-based technologies for effective service delivery adapted to the current user needs and the task at hand, and d) middleware services that explicitly reveal not only the characteristics of the information sources, but also address the context of specific telematic services, through appropriate mediation mechanisms. Received: 10 April 1997 / Revised: 6 July 1997 / Accepted: 5 August 1997     

ScholOnto: an ontology-based digital library server for research documents and discourse

The internet is rapidly becoming the first place for researchers to publish documents, but at present they receive little support in searching, tracking, analysing or debating concepts in a literature from scholarly perspectives. This paper describes the design rationale and implementation of ScholOnto, an ontology-based digital library server to support scholarly interpretation and discourse. It enables researchers to describe and debate via a semantic network the contributions a document makes, and its relationship to the literature. The paper discusses the computational services that an ontology-based server supports, alternative user interfaces to support interaction with a large semantic network, usability issues associated with knowledge formalisation, new work practices that could emerge, and related work. Published online: 22 September 2000     

数字图书馆元数据互操作机制的研究

元数据是数字图书馆建设的关键技术之一,随着越来越多的元数据标准的出现,元数据的互操作问题已成为数字图书馆互操作的一个重要方面。分析元数据互操作产生的原因,从技术角度总结和研究元数据互操作的主要解决途径, 指出存在的问题,最后给出利用网格技术实现元数据互操作的思路。     

An action checklist for national self‐reliance in informatics

Abstract

The paper addresses the need for a practical guide to the formulation of an operational strategy for Informatics development in less developed countries. Given the importance of Informatics, which cuts across and interacts with almost all strategic sectors of a nation's life, the inherent problems attending its development in less developed countries call for a self‐reliant approach albeit with the support of the international community. Some key issues involved are discussed and the paper concludes with an illustrative 20‐point checklist of actions which, it is suggested, may be adapted as appropriate to meet the particular needs of any country.     

基于J2EE构建数字图书馆

为了使图书馆更好地服务于读者和提高工作人员工作效率,文章主要使用了J2EE框架技术,研究了数字图书馆的相关技术,给出了系统设计的功能模块和体系结构,以及系统实现的关键技术。数字图书馆的构建方便了读者对资源的有效使用和提高了办公效率,使系统的安全性、可维护性和操作便捷性都有很大的提高。     

MySQL: lessons learned on a digital library

In recent years, the open source products have achieved enterprise-level quality. In response, enterprises have become more interested in migrating from proprietary, commercial products to open source. Businesses around the world commonly use the two leading open source relational DBMSs, MySQL and PostgreSQL. The Los Alamos National Laboratory's Research Library has used MySQL databases for years. However, a recent project to develop a comprehensive database of scientific journal articles and citation information revealed its unique strengths and features.     

DILIGENT: integrating digital library and Grid technologies for a new Earth observation research infrastructure

This paper introduces DILIGENT, a digital library infrastructure built by integrating digital library and Grid technologies and resources. This infrastructure allows different communities to dynamically build specialised digital libraries capable to support the entire e-Science knowledge production and consumption life-cycle by using shared computing, storage, content, and application resources. The paper presents some of the main software services that implement the DILIGENT system. Moreover, it exemplifies the provided features by presenting how the DILIGENT infrastructure is being exploited in supporting the activity of user communities working in the Earth Science Environmental sector. This work is partially funded by the European Commission in the context of the DILIGENT project, under the 2nd call of FP6 IST priority.     

Multimedia information using mobile computers: accessing the digital campus and the digital library

Abstract

It is clear that the role of the information resource is changing. Major publishers have been slow to adapt to the emergence of a global digital medium, but there are now signs that a great deal of information will be delivered on-line, (although at present only about 25 databases account for 80% of usage in UK and optical publishing is still in its early stages). However, digital publishing on the Internet — with services for libraries such as just-in-time purchasing and delivery, for example — will be a driving force in creating the ‘global digital medium’. One issue that will become increasingly relevant is how the individual user accesses rich multimedia data in the most appropriate way. The ‘digital university campus’ and the ‘digital library’ are coming to be important concepts, with the aim that users of information services will receive information on-line supported by a ‘ubiquistructure’ of information technology. For the ‘digital campus’ this means that not only scholarly but also teaching activities are based on interactive access to information, and where not only the digital library but also the digital bookshop and the digital classroom are becoming possible with the development of 140Mb/s SuperJANET links. However, it is recognised that libraries will not be truly digital for the foreseeable future, and that libraries will maintain traditional and digital media side by side. In this paper, reporting on work at the University of Bristol's Educational Technology Service multimedia resources unit MRU, and the University of the West of England's Centre for Personal Information Management (in collaboration with Hewlett-Packard Research Laboratories and the University of Bristol's Centre for Communications Research), we look the ‘digital library’ and ‘digital campus’ from the perspective of the individual user and her information needs. We are particularly interested in the use of small, mobile computers as access points to the global digital medium. We suggest that, in an environment of change — where the traditional campus and the traditional library exist alongside the digital campus and digital library — the most appropriate form of access technology is based on ‘personal technology’ which allows a linking between digital information and traditional paper-based information.     

A briefing on the evolution and status of the Open Video digital library

This briefing introduces the reader to an ongoing digital library project that serves as a testbed for research that in turn informs the development of the digital library. The paper is informal with pointers to the technical literature. It aims to illustrate some of the issues and challenges facing digital library researchers and practitioners.     

基于LightAPP和NativeAPP方式建设高校数字图书馆的尝试

通过分析我国高校图书馆在推进数字阅读方面存在的种种问题,指出目前高校数字阅读平台推进方面存在认识、推广、建设方面的误区。通过移动图书馆的开发及基于微信公众服务平台的移动阅读平台的开发经验,探索利用LightAPP和NativeAPP两种方式,为读者提供轻阅读与重阅读两种阅读体验,极大激发了读者阅读的兴趣,为高校移动图书馆建设探索了一条新路。     

Synchronous learning best practices: An action research study

Low cost and significant advances in technology now allow instructors to create their own virtual learning environments. Creating social interactions within a virtual space that emulates the physical classroom remains challenging. While students are familiar with virtual worlds and video meetings, they are inexperienced as virtual learners. Over a nine year period we applied iterative cycles of action research through numerous large classes to systematically uncover attributes of success when executing synchronous learning in distributed environments. Findings show technology is not the source of problems; rather, difficulties emerge from human behaviors and their interactions with system features. We conclude with practical takeaway guidelines for video conferencing and immersive virtual environments and a model of nexus of control that elaborates software and classroom management attributes that can lead to successful execution.     

An evaluation study of a digital library of ideas: Workflow Model and classroom use

The Department of Design Manufacturing and Engineering Management at the University of Strathclyde, Glasgow, UK, has been developing a digital library to support design engineering student learning through the Digital Libraries for Global Distributed Innovative Design Education and Teamwork project (, December, 2007). Previous related studies have observed and analysed how students search for, store, structure and share design engineering information (Grierson et al. in paper presented at the Network Learning Conference, pp. 572–579, 2004; Nicol et al. in Open Learning 20(1):31–49, 2005) and these studies have identified the need for the design and development of a digital library with two system components, which best suit the design process: (i) an informal shared workspace; the ‘LauLima’ Learning Environment and (ii) a repository of more formal searchable and browsable design information; the ‘LauLima’ Digital Library (McGill et al. in Br. J. Educ. Technol. 36(4):629–642, 2005). This paper focuses on the Workflow Model developed to populate the digital library and presents findings from early use of the digital library by students and staff.     

Interoperability of the national system of electronic digital signatures

The reasons of the absence of interoperability of the National system of electronic digital signatures (EDS) are analyzed based on systems analysis. An attempt is made to substantiate the minimax (minimum costs and maximum results) way of solving interoperability problems in EDS infrastructure in both Ukraine and foreign states.