Title page for ETD etd-04142011-175752


Type of Document Dissertation
Author Murthy, Uma
Author's Email Address umurthy@vt.edu
URN etd-04142011-175752
Title Digital Libraries with Superimposed Information: Supporting Scholarly Tasks that Involve Fine Grain Information
Degree PhD
Department Computer Science
Advisory Committee
Advisor Name Title
Fox, Edward Alan Committee Chair
Delcambre, Lois M. Committee Member
Pérez-Quiñones, Manuel A. Committee Member
Ramakrishnan, Naren Committee Member
Torres, Ricardo da Silva Committee Member
Keywords
  • Annotation
  • Digital libraries
  • Fish species identification
  • Image retrieval
  • Metamodel
  • Subdocument
  • Superimposed information
  • User study
Date of Defense 2011-01-28
Availability unrestricted
Abstract
Many scholarly tasks involve working with contextualized fine-grain information, such as a music professor creating a multimedia lecture on a musical style, while bringing together several snippets of compositions of that style. We refer to such contextualized parts of a larger unit of information (or whole documents), as subdocuments. Current approaches to work with subdocuments involve a mix of paper-based and digital techniques. With the increase in the volume and in the heterogeneity of information sources, the management, organization, access, retrieval, as well as reuse of subdocuments becomes challenging, leading to inefficient and ineffective task execution. A digital library (DL) facilitates management, access, retrieval, and use of collections of data and metadata through services. However, most DLs do not provide infrastructure or services to support working with subdocuments. Superimposed information (SI) refers to new information that is created to reference subdocuments in existing information resources. We combine this idea of SI with traditional DL services, to define and develop a DL with SI (an SI-DL). Our research questions are centered around one main question: how can we extend the notion of a DL to include SI, in order to support scholarly tasks that involve working with subdocuments? We pursued this question from a theoretical as well as a practical/user perspective. From a theoretical perspective, we developed a formal metamodel that precisely defines the components of an SI-DL, building upon related work in DLs, SI, annotations, and hypertext. From the practical/user perspective, we developed prototype superimposed applications and conducted user studies to explore the use of SI in scholarly tasks. We developed SuperIDR, a prototype SI-DL, which enables users to mark up subimages, annotate them, and retrieve information in multiple ways, including browsing, and text- and content-based image retrieval. We explored the use of subimages and evaluated the use of SuperIDR in fish species identification, a scholarly task that involves working with subimages. Findings from the user studies and other work in our research lead to theory- and experiment-based enhancements that can guide design of digital libraries with superimposed information.
Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  murthy-u-d-2011-dissertation.pdf 26.22 Mb 02:01:22 01:02:25 00:54:37 00:27:18 00:02:19
  murthy-u-d-2011-superidr-readme.pdf 147.59 Kb 00:00:40 00:00:21 00:00:18 00:00:09 < 00:00:01
  murthy-u-d-2011-superidr-source-images.zip 77.91 Mb 06:00:41 03:05:29 02:42:18 01:21:09 00:06:55
  murthy-u-d-2011-superidr-source-main.zip 7.31 Mb 00:33:50 00:17:24 00:15:13 00:07:36 00:00:38

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