Browsing by Author "Delcambre, Lois M. L."

Now showing 1 - 4 of 4
  • Thumbnail Image
    Ensemble PDP-8: Eight Principles for Distributed Portals
    Fox, Edward A.; Chen, Yinlin; Akbar, Monika; Shaffer, Clifford A.; Edwards, Stephen H.; Brusilovsky, Peter; Garcia, Daniel D.; Delcambre, Lois M. L.; Decker, Felicia; Archer, David W.; Furuta, Richard; Shipman, Frank M., III; Carpenter, B. Stephen, II; Cassel, Lillian N. (2010)
    Ensemble, the National Science Digital Library (NSDL) Pathways project for Computing, builds upon a diverse group of prior NSDL, DL-I, and other projects. Ensemble has shaped its activities according to principles related to design, development, implementation, and operation of distributed portals. Here we articulate 8 key principles for distributed portals (PDPs). While our focus is on education and pedagogy, we expect that our experiences will generalize to other digital library application domains. These principles inform, facilitate, and enhance the Ensemble R&D and production activities. They allow us to provide a broad range of services, from personalization to coordination across communities. The eight PDPs can be briefly summarized as: (1) Articulation across communities using ontologies. (2) Browsing tailored to collections. (3) Integration across interfaces and virtual environments. (4) Metadata interoperability and integration. (5) Social graph construction using logging and metrics. (6) Superimposed information and annotation integrated across distributed systems. (7) Streamlined user access with IDs. (8) Web 2.0 multiple social network system interconnection.
  • Thumbnail Image
    Extending the 5S Digital Library Framework: From a Minimal DL Towards a DL Reference Model
    Murthy, Uma; Gorton, Douglas; Torres, Ricardo da Silva; Goncalves, Marcos A.; Fox, Edward A.; Delcambre, Lois M. L. (2007-06-23)
    In this paper, we describe ongoing research in three DL projects that build upon a common foundation: the 5S DL framework. In each project, we extend the 5S framework to provide specifications for a particular type of DL service and/or system - finally, moving towards a DL reference model. In the first project, we are working on formalizing content-based image retrieval services in a DL. In the second project, we are developing specifications for a superimposed information-supported DL (combining annotation, hypertext, and knowledge management technologies). In the third effort, we have used the 5S framework to generate a practical DL system based on the DSpace software.
  • Thumbnail Image
    Extending the 5S Framework of Digital Libraries to support Complex Objects, Superimposed Information, and Content-Based Image Retrieval Services
    Murthy, Uma; Kozievitch, Nadia; Leidig, Jonathan; Torres, Ricardo da Silva; Yang, Seungwon; Goncalves, Marcos A.; Delcambre, Lois M. L.; Archer, David W.; Fox, Edward A. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2010)
    Advanced services in digital libraries (DLs) have been developed and widely used to address the required capabilities of an assortment of systems as DLs expand into diverse application domains. These systems may require support for images (e.g., Content-Based Image Retrieval), Complex (information) Objects, and use of content at fine grain (e.g., Superimposed Information). Due to the lack of consensus on precise theoretical definitions for those services, implementation efforts often involve ad hoc development, leading to duplication and interoperability problems. This article presents a methodology to address those problems by extending a precisely specified minimal digital library (in the 5S framework) with formal definitions of aforementioned services. The theoretical extensions of digital library functionality presented here are reinforced with practical case studies as well as scenarios for the individual and integrative use of services to balance theory and practice. This methodology has implications that other advanced services can be continuously integrated into our current extended framework whenever they are identified. The theoretical definitions and case study we present may impact future development efforts and a wide range of digital library researchers, designers, and developers.
  • Thumbnail Image
    Use of Subimages in Fish Species Identification: A Qualitative Study
    Murthy, Uma; Li, Lin Tzy; Hallerman, Eric M.; Fox, Edward A.; Pérez-Quiñones, Manuel A.; Delcambre, Lois M. L.; Torres, Ricardo da Silva (Department of Computer Science, Virginia Polytechnic Institute & State University, 2011-03-01)
    Many scholarly tasks involve working with subdocuments, or contextualized fine-grain information, i.e., with information that is part of some larger unit. A digital library (DL) facil- itates 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 subdocu- ments in existing information resources. We combine this idea of SI with traditional DL services, to define and develop a DL with SI (SI-DL). We explored the use of subimages and evaluated the use of a prototype SI-DL (SuperIDR) in fish species identification, a scholarly task that involves work- ing with subimages. The contexts and strategies of working with subimages in SuperIDR suggest new and enhanced sup- port (SI-DL services) for scholarly tasks that involve working with subimages, including new ways of querying and search- ing for subimages and associated information. The main contribution of our work are the insights gained from these findings of use of subimages and of SuperIDR (a prototype SI-DL), which lead to recommendations for the design of digital libraries with superimposed information.