Regia: a metadata editor for audiovisual documents

Although the Metadata Editor is an important part of any digital library, it becomes fundamental in the presence of audiovisual content. This is because the metadata produced by automated support tools (such as speech recognizers and shot detection procedures) is error-prone and often needs correction. In addition, scenes are manually annotated. This paper describes Regia, a prototype application for manually editing metadata for audiovisual documents developed in the ECHO project. Regia allows the user to manually edit textual metadata and to hierarchically organize the segmentation of the audiovisual content. An important feature of this metadata editor is that it is not hard-wired with a particular metadata attributes set. To achieve this feature the XML schema of the metadata model is used by the editor as a configuration file.

ActiveGraph: A digital library visualization tool

ActiveGraph is an information visualization tool designed to provide users with a concise, customizable view of objects in a digital library. A set of digital library objects is represented as a data set in a two- or three-dimensional scatter plot. The data set can represent any digital library objects in any medium: books, journals, papers, images, Web resources, or even entire databases. Since ActiveGraph is intended for use in the context of digital libraries, data attributes consist for the most part of metadata fields such as title, author, date of publication, and number of citations. Data attributes are mapped to six visual attributes of the scatter plot: the X-, Y-, and Z-axes, color, size, and shape. The metadata for a selected data point are displayed in a control panel on the right-hand side of the screen. Users can edit the metadata and even add new metadata fields. Thus ActiveGraph allows users to both view and customize the contents of a library. Because of its flexibility in handling digital library objects and metadata of different types, ActiveGraph can be used in a variety of digital library applications. In this paper, we describe two: LibGraph, which is a visualization of a collaborative library, and CiteGraph, which is a visualization of citation statistics. Both applications were designed for use by scientists and engineers, for whom scatter plots are familiar and intuitive visualizations.     

Teaching digital library concepts using digital library applications

Many digital library topics may be taught using digital library applications, in the context of project-based digital library courses. Several digital library applications exist, and these applications are used as teaching tools to illustrate the functionality of digital libraries as well as the design decisions that go into them. Using digital library applications as teaching tools provides a valuable learning experience for students, and may provide useful feedback to the developers of DL applications. This paper identifies and explores DL topics that may most effectively be taught using DL applications, in the context of project-based DL courses.     

新闻视频、音频中的主题检测

1.引言面对日益庞大的信息量,如何有效地检索到感兴趣的内容是至关重要的。新闻视频、音频(包括电视、广播)与文字报道相比,更为生动,表达更为丰富,但也有数据量大、难以组织、索引、检索等缺点。这主要体现在两方面; 文本有标题、段等明显的辅助标记,而视频、音频则没有。一般的浏览工具只有播放、快进、快退、拖动定位等简单手段。这对于几十、几百小时,而且还在日益增长的视频、音频数据库,是远远不能满足要求的。     

Recommenders in a personalized,collaborative digital library environment

We envisage an information source not only as an information resource where users may submit queries to satisfy their daily information need, but also as a collaborative working and meeting space of people sharing common interests. Indeed, we will present a highly personalized environment where not only users may organize (and search into) the information space according to their individual taste and use, but which provides advanced features of collaborative work among the users. It is up to the system to discover interesting properties about the users’ interests, relationships between users and user communities and to make recommendations based on preference patterns of the users, which is the main topic of this paper.     

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.     

An authorization model for multimedia digital libraries

In this paper we present a generalized authorization model for multimedia digital libraries. Our aim is to support the enforcement of access control requirements of the original data sources without the need to create a new, unified model for the digital library. We integrate the three most widely used access control models (i.e., mandatory, discretionary, and role-based) within a single framework, allowing seamless accesses to data protected by these security models. In particular, we address the access control needs of continuous media data while supporting quality of service (QoS) requirements and preserving operational semantics. The technical core of the paper focuses on the development of metadata and the corresponding metastructure to represent authorization policies and QoS requirements and shows their applicabilty to continuous media. We define our security objects based on the Synchronized Multimedia Integration Language (SMIL), which controls multimedia presentations. Following the synchronization constructs par and seq of SMIL, we define a normal form for multimedia streams, called SMIL normal form. SMIL normal form provides a syntax-independent representation of semantically equivalent multimedia data. SMIL normal form compositions are extended (decorated) with RDF statements, representing security and QoS metadata. Interpretation of these statements and, therefore, the authorization and QoS requirements of the decorated multimedia object are defined by the metastructure, represented as a DAML+OIL ontology. We propose the concept of generalized subject that encompasses all access permissions of a given user regardless of the multiple permissions in different access control models. Finally, we develop methods to generate secure views for each generalized subject and retrieve them using a secure multimedia server.     

The design and implementation of a digital music library

The design and implementation of Harbin Institute of Technology—Digital Music Library (HIT-DML) is presented in this paper. Firstly, a novel framework, a music data model, and a query language are proposed as the theoretical foundation of the library. Secondly, music computing algorithms used in the library for feature extracting and matching are described. In addition, indices are introduced for both mining themes of music objects and accelerating content-based information retrieval. Finally, experimental results on the indices and the current development of the library are provided. HIT-DML is distinguished by the following points. First, it is inherently based on database systems, and combines database technologies with multimedia technologies seamlessly. Musical data are structurally stored. Second, it has a solid theoretical foundation, from framework and data model to query language. Last, it can retrieve musical information based on content against different kinds of musical instruments. The indices used, also power the library.     

OpenDLib: an infrastructure for new generation digital libraries

This paper presents OpenDLib, a digital library infrastructure that provides capabilities for new-generation digital libraries. In particular, the paper introduces a document model that can be used to represent a wide variety of document types and describes the open architectural infrastructure that allows for the expansion of the digital library through the dynamic plugin of new services.     

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.     

Integration of complex archeology digital libraries: An ETANA-DL experience

In this paper, we formalize the digital library (DL) integration problem and propose an overall approach based on the 5S (streams, structures, spaces, scenarios, and societies) framework. We then apply that framework to integrate domain-specific (archeological) DLs, illustrating our solutions for key problems in DL integration. An integrated Archeological DL, ETANA-DL, is used as a case study to justify and evaluate our DL integration approach. More specifically, we develop a minimal metamodel for archeological DLs within the 5S theory. We implement the 5SSuite tool set to cover the process of union DL generation, including requirements gathering, conceptual modeling, rapid prototyping, and code generation. 5SSuite consists of 5SGraph, 5SGen, and SchemaMapper, each of which plays an important role in DL integration. We also propose an approach to integrated DLs based on the 5S formalism, which provides a systematic method to design and implement DL exploring services.     

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.     

云计算在数字化图书馆建设中的应用

云计算将图书馆海量数字资源存储带入了新的时代.随着时代的变迁,图书馆及其用户对海量存储系统的要求也在不断地提升,因此无论多么完善的技术都会遇到瓶颈问题,云计算技术当然也不例外.为了使数字化图书馆的云计算技术走的更远,应该从各个方面找到云计算已经遇到或可能遇到的瓶颈问题,对其进行改进,使其更好的为数字化图书馆和用户服务.     

A radiology archive using a digital library

Received: 5 April 1997 / Revised: 15 June 1997 / Accepted: 5 August 1997     

web数据挖掘在数字图书馆个性化服务中的应用

Web挖掘是数据挖掘与Web领域相结合的产物,其应用领域非常广泛。将web数据挖掘技术应用在数字图书馆领域,可发现用户的兴趣爱好、频繁访问的路径、页面的相关性、期望位置及重要页面等信息,从而为数字图书馆满足个性化的服务要求提供了基础。     

Production model based digital video segmentation

Effective and efficient tools for segmenting and content-based indexing of digital video are essential to allow easy access to video-based information. Most existing segmentation techniques do not use explicit models of video. The approach proposed here is inspired and influenced by well established video production processes. Computational models of these processes are developed. The video models are used to classify the transition effects used in video and to design automatic edit effect detection algorithms. Video segmentation has been formulated as a production model based classification problem. The video models are also used to define segmentation error measures. Experimental results from applying the proposed technique to commercial cable television programming are presented.