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The fire blocking performance of barrier fabrics laminated to upholstery materials was investigated. The results are two-fold. The first involves information...
We revisit the problem of Full Disk Encryption (FDE), which refers to the encryption of each sector of a disk volume. In the context of FDE, it is assumed that...
Jian Yao, Michael A. Lombardi, Andrew N. Novick, Bijunath Patla, Jeffrey A. Sherman, Victor S. Zhang
Errors in the Coordinated Universal Time (UTC) offset parameters broadcast by Global Positioning System (GPS) satellites caused many thousands of GPS clocks to...
We report on a preliminary design of a new Kalman-filter Hydrogen-maser time scale at NIST. The time scale is composed of a few Hydrogen masers and a Cs clock...
Victor S. Zhang, Demetrios Matsakis, Zhiheng Jiang
Calibration and link stability are the key issues for the UTC time transfer. This study is made in the framework of a joint task group of the CCTF Working Group...
David R. Leibrandt, Samuel M. Brewer, Jwo-Sy Chen, Aaron M. Hankin, David B. Hume, David J. Wineland, Chin-Wen Chou
Frequency and its inverse, time, are the most accurately measured quantities. Historically, improvements in the accuracy of clocks have enabled advances in...
Victor S. Zhang, Zhiheng Jiang, Thomas E. Parker, Jian Yao, Yi-Jiun Huang, Shinn-Yan Lin
The conventional wisdom suggests a direct Two-Way Satellite Time and Frequency Transfer (TWSTFT or TW) time link should result in a smaller uncertainty than...
Victor S. Zhang, Thomas E. Parker, Joseph Achkar, Dirk Piester, Yi-Jiun Huang, Shinn-Yan Lin, Zhiheng Jiang
The BIPM and the CCTF Working Group on TWSTFT have stimulated a pilot study on using software defined radio (SDR) receivers for TWSTFT in the framework of the...
Network Time Protocol (NTP) servers maintained by national timing laboratories are ideally synchronized to a one pulse-per-second (pps) signal from the official...
Joshua J. Savory, Liz C. Forero, Kristopher Maurer, Stefania Romisch
The National Institute of Standards and Technology (NIST) timescale produces a real-time realization of UTC(NIST) in the form of a pulse-per-second (PPS) time...
The current real-time timescale at NIST, AT1, as well as the post-processed scale TP162, both contain hydrogen masers and commercial cesium frequency standards...
Marc A. Weiss, Alison Silverstein, Francis Tuffner, Ya-Shian Li-Baboud
Today, the principal way that power system owners and operators use precision timing is for fault recording, protection system operation and in synchrophasor...
The Public Safety Communications Research Program (PSCR) convened over 80 stakeholders at the National Institute of Standards and Technology (NIST) Boulder, CO...
Defense-in-depth is an important security architecture principle that has significant application to industrial control systems (ICS), cloud services...
Vincent Y. Kotsubo, Ray Radebaugh, Sae Woo Nam, Joel N. Ullom, Brandon L. Wilson, Paul Hendershott, Micheal Bonczyski
We are developing a compact, low power, closed cycle cooling system for Superconducting Nanowire Single Photon Detectors. The base temperature of the present...
Lior Medina, Rivka Gilat, B. Robert Ilic, Slava Krylov
We demonstrate an open-loop self-excitation response in a curved, bistable microelectromechanical beam under a time-independent electrostatic load. The self...
This paper presents optical measurements of the dynamic strain profiles along the tethers of microelectromechanical resonators and relates them to quality...
This paper reports on quantification and management of inherent systemic risk/performance tradeoff in the cloud computing model. We view Cloud as a Complex...
Chris Rojahn, Laurie Johnson, Thomas O'Rourke, Veronica Cedillos, Therese P. McAllister
The concept of community resilience is a complex, multi-dimensional problem that relies on social science, engineering, earth sciences, economics, and other...
An analytical method is developed to investigate the potential energy of fully nonlinear framed structures and other energy characteristics due to earthquake...
Performance-based standards use plastic rotation as an important measure to determine whether the response meets the acceptance criteria for moment-resisting...
Samantha Gamboa Quintiliani, Fernando Cintron, David W. Griffith, Richard A. Rouil
Long Term Evolution Advanced (LTE-A) introduces a new feature called Proximity Services (ProSe), which enables device-to-device (D2D) communication between User...
Raul Uribe, Siamak Sattar, Matthew Speicher, Luis Ibarra
This paper quantifies the impact of using different ground motion selection methods to evaluate the seismic performance of steel special moment frames. Two...
Structural engineers in the United States have turned to performance-based design methodologies for design of new buildings in order to find improved design...
With the congestion and scarcity of available spectrum resources, spectrum sharing between long-term evolution (LTE) and the IEEE 802.11 (aka. WLAN) systems is...
Azza Ben Mosbah, Timothy Hall, Michael R. Souryal, Hossam Afifi
Sharing between commercial and Federal incumbent users, such as in the 3.5 GHz band, is expected to increase the availability of spectrum for wireless broadband...
We investigate the role of the electric field and its normal derivative in three-dimensional electromagnetic scattering theory. In particular, we present an...
Supply chain management is critically dependent on trusted email with authentication systems that work on a global scale. Solutions to date have not adequately...
The ferromagnetic Ising model with zero applied field reduces to sampling even subgraphs X of a graph G with probability proportional to $\lambda^|E(X)|}$, for...