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Browsing by Author "Vemuri, Naga Srinivas"

Now showing 1 - 6 of 6
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    Email-Set Visualization: Facilitating Re-Finding in Email Archives
    Gorton, Douglas; Murthy, Uma; Vemuri, Naga Srinivas; Pérez-Quiñones, Manuel A. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2007-05-01)
    In this paper we describe ESVT – EmailSet Visualization Tool, an email archive tool that provides users a visualization to re-find and discover information in their email archive. ESVT is an end-to-end email archive tool that can be used from archiving a user’s email messages to visualizing queries on the email archive. We address email archiving by allowing import of email messages from an email server or from a standard existing email client. The central idea in ESVT’s visualization, an “email-set”, is the set of emails that are the result of a query on a user’s email archive. ESVT provides a multiple email-set view - visualization of multiple email-sets on a time axis. In addition, each email set can be individually visualized based on person and time axis, using the single email-set view. Query logs, individual email visualization, multiple email set visualization provide rich contextual cues, thus enabling end users to deal with email overload and re-find past email which otherwise wouldn’t be discovered easily.
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    EtanaViz: A Visual User Interface to Archaeological Digital Libraries
    Shen, Rao; Vemuri, Naga Srinivas; Vijayaraghavan, Vidhya; Fan, Weiguo; Fox, Edward A. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2005-10-01)
    Analyzing and hypothesizing are important scientific processes involved in archaeological activity. In this paper, we describe a visual user interface closely coupled with services for archaeological digital libraries, to help archaeologists analyze data and test hypotheses. Our system, EtanaViz, employs a dynamic hyperbolic tree to display hierarchical relationships among excavation records, based on spatial, temporal, and artifact-related taxonomies. Also, EtanaViz provides stacked bar charts to indicate categories. More specifically, we show how EtanaViz can help users analyze data about animal bones excavated from two archaeological sites, Tell Nimrin and Tell al-'Umayri'. The fauna are associated with cultural phases. Comparisons of animal bones from Tell Nimrin across cultural phases provide insights into changing subsistence strategies during these time periods. Inter-site comparisons also show shifts in animal use as well as long-term adaptations to environmental changes.
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    Incremental, Semi-automatic, Mapping-Based Integration of Heterogeneous Collections into Archaeological Digital Libraries: Megiddo Case Study
    Raghavan, Ananth; Vemuri, Naga Srinivas; Shen, Rao; Goncalves, Marcos A.; Fan, Weiguo; Fox, Edward A. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2005)
    Automation is an important issue when integrating heterogeneous collections into archaeological digital libraries. We propose an incremental approach through intermediary- and mapping-based techniques. A visual schema mapping tool within the 5S framework allows semi-automatic mapping and in-cremental global schema enrichment. 5S also helped speed up development of a new multi-dimensional browsing service. Our approach helps integrate the Me-giddo excavation data into a growing union archaeological DL, ETANA-DL.
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    Integration of Heterogeneous Digital Libraries with Semi-automatic Mapping and Browsing: From Formalization to Specification to Visualization
    Shen, Rao; Vemuri, Naga Srinivas; Raghavan, Ananth; Goncalves, Marcos A.; Rangarajan, Divya; Fan, Weiguo; Fox, Edward A. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2005)
    In this paper, we formalize the digital library (DL) integration problem and propose an overall approach based on the 5S framework. We apply 5S to domain-specific (archaeological) DLs, illustrating our solutions for key problems in DL integration. We use ETANA-DL as a case study to describe the process of semi-automatically generating a union catalog and a unified browsing service in an archaeological DL. A visual schema mapping tool is developed for union catalog creation. A pilot user study aids tool evaluation. Our approach is further validated through application of a general browsing component to two integrated DLs.
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    Schema Mapper: A Visualization Tool for DL Integration
    Raghavan, Ananth; Rangarajan, Divya; Shen, Rao; Goncalves, Marcos A.; Vemuri, Naga Srinivas; Fan, Weiguo; Fox, Edward A. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2005)
    Schema mapping is a challenging problem. It has come to the fore in recent years; there are important applications like database schema integration and, more recently, digital library merging of heterogeneous data. Previous studies have approached the schema mapping process either from algorithmic or visualization perspectives, with few integrating both. With Schema Mapper we demonstrate a semi-automatic tool for schema integration that combines a novel visual interface with an algorithm-based recommendation engine. Schemas are visualized as hyperbolic trees (see Fig. 1), thus allowing more schema nodes to be displayed at one time. Matches to selections are recommended to the user, which makes the mapping operation easier and faster.
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    What is a Successful Digital Library?
    Shen, Rao; Vemuri, Naga Srinivas; Fan, Weiguo; Fox, Edward A. (2006-09-18)
    We synthesize diverse research in the area of digital library (DL) quality models, information systems (IS) success and adoption models, and information-seeking behavior models, to present a more integrated view of the concept of DL success. Such a multi-theoretical perspective, considering user community participation throughout the DL development cycle, supports understanding of the social aspects of DLs and the changing needs of users interacting with DLs. It also helps in determining when and how quality issues can be measured and how potential problems with quality can be prevented.