Browsing by Author "Leidig, Jonathan"

Now showing 1 - 3 of 3
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    Economic and Social Impact of Influenza Mitigation Strategies by Demographic Class
    Barrett, Christopher L.; Bisset, Keith R.; Leidig, Jonathan; Marathe, Achla; Marathe, Madhav V. (Elsevier, 2011-03-01)
    Background—We aim to determine the economic and social impact of typical interventions proposed by the public health officials and preventive behavioral changes adopted by the private citizens in the event of a “flu-like” epidemic. Method—We apply an individual-based simulation model to the New River Valley area of Virginia for addressing this critical problem. The economic costs include not only the loss in productivity due to sickness but also the indirect cost incurred through disease avoidance and caring for dependents. Results—The results show that the most important factor responsible for preventing income loss is the modification of individual behavior; it drops the total income loss by 62% compared to the base case. The next most important factor is the closure of schools which reduces the total income loss by another 40%. Conclusions—The preventive behavior of the private citizens is the most important factor in controlling the epidemic.
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    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.
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    File Formats, Transformation, and Migration
    Leidig, Jonathan; Alon, A. J.; Chigani, Amine; Gopalakrishnan, Mahima; Park, Sung Hee (2009-10-09)
    This module covers the principles and applications of the transformation and migration processes for the preservation of digital content, as well as key issues surrounding digital preservation strategies.