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Information Technology

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Displaying 1101 - 1125 of 4392

The Influence of Realism on Congestion in Network Simulations

January 8, 2016
Author(s)
Kevin L. Mills, Christopher E. Dabrowski
Many researchers have used simulation to investigate the spread of congestion in networks. These researchers often find that congestion can be modeled as a percolation process, spreading slowly under increasing load until a critical point. After the

An Effective Video Synopsis Approach with Seam Carving

January 1, 2016
Author(s)
Hamid Gharavi
With a growth of surveillance cameras, the amount of captured videos expands. Manually analyzing and retrieving surveillance video is labor intensive and expensive. It would be much more convenient to generate a video digest, with which we can view the

Third-Party Software's Trust Quagmire

December 18, 2015
Author(s)
Jeffrey M. Voas, George Hurlburt
Integrating software developed by third-party organizations into a larger system raises concerns about the software's quality, origin, functionality, security, and interoperability. Addressing these concerns requires rethinking the roles of software's

A Hybrid Task Graph Scheduler for High Performance Image Processing Workflows

December 16, 2015
Author(s)
Timothy J. Blattner, Walid Keyrouz, Milton Halem, Shuvra S. Bhattacharyya, Mary C. Brady
The scalability of applications is a key requirement to improving performance in hybrid and cluster computing. Scheduling code to utilize parallelism is difficult, particularly when dealing with dependencies, memory management, data motion, and processor

Towards a Systematic Threat Modeling Approach for Cyber-physical Systems

December 15, 2015
Author(s)
Goncalo Martins, Sajal Bhatia, Xenofon Koutsoukos, Keith A. Stouffer, CheeYee Tang, Rick Candell
Cyber-Physical Systems (CPS) are systems with seamless integration of physical, computational and networking components. These systems can potentially have an impact on the physical components, hence it is critical to safeguard them against a wide range of

Towards a Reconfigurable Distributed Testbed to Enable Advanced Research and Development of Timing and Synchronization in Cyber-Physical Systems

December 8, 2015
Author(s)
Aviral Shrivastava, J C. Eidson, Marc A. Weiss, Ya-Shian Li-Baboud, Hugo Andrade, Patricia Derler, Kevin Stanton
Timing and synchronization play a key role in advanced cyber-physical systems (CPS). Precise timing, as often required in safety-critical CPS, depends on hardware support for enforcement of periodic measure, compute, and actuate cycles. For general CPS

Catastrophic Event Phenomena in Communication Networks: A Survey

December 1, 2015
Author(s)
Christopher E. Dabrowski
With the rise of the Internet, there has been increased interest in the use of computer models to study the dynamics of communication networks. An important aspect of this trend has been the study of dramatic, but relatively infrequent, events that result

Deep-subwavelength Nanometric Image Reconstruction using Fourier Domain Optical Normalization

November 5, 2015
Author(s)
Jing Qin, Richard M. Silver, Bryan M. Barnes, Hui Zhou, Ronald G. Dixson, Mark Alexander Henn
Quantitative optical measurements of deep sub-wavelength, three-dimensional, nanometric structures with sensitivity to sub-nanometer details address an ubiquitous measurement challenge. A Fourier domain normalization approach is used in the Fourier optical

Cyber-Physical Systems Framework

November 2, 2015
Author(s)
David A. Wollman
Two worlds that have operated independently—the digital and physical worlds—are now merging, creating opportunities that will transform many sectors of our society. These new smart systems are based on engineered interacting networks of physical and

The NIST IAD Data Science Evaluation Series: Part of the NIST Information Access Division Data Science Research Program

October 29, 2015
Author(s)
Bonnie J. Dorr, Craig Greenberg, Peter Fontana, Mark A. Przybocki, Marion Le Bras, Cathryn A. Ploehn, Oleg Aulov, Wo L. Chang
The Information Access Division (IAD) of the National Institute of Standards and Technology (NIST) launched a new Data Science Research Program (DSRP) in the fall of 2015. This research program focuses on evaluation-driven research and will establish a new
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