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Search Publications

NIST Authors in Bold

Displaying 36301 - 36325 of 74151

Propagation and Detection of Radio Signals Before, During, and After the Implosion of a Large Sports Stadium (Veterans Stadium in Philadelphia)

October 1, 2005
Author(s)
Christopher L. Holloway, Galen H. Koepke, Dennis G. Camell, Catherine A. Remley, Dylan F. Williams, Susan A. Schima, Seturnino Canales
In this report, we investigate radio communications problems faced by emergency responders (firefighters and police) in disaster situation such as collapsed buildings. A fundamental challenge to communications into and out of large buildings is the strong

Protection Switching for Optical Bursts Using Segmentation and Deflection Routing

October 1, 2005
Author(s)
David W. Griffith, Kotikalapudi Sriram, Nada T. Golmie
Burst segmentation in OBS networks can significantly reduce the amount of data that is lost due to contention events by dropping or deflecting only the portion of a burst that overlaps another contending burst. In this letter, we demonstrate how

Proximity effects in the calibration of microwave radiometers

October 1, 2005
Author(s)
Ronald C. Wittmann, Amanda Cox, Randy Direen
Microwave, total-power radiometers are calibrated by observing sources of known brightness temperature. Free-space calibrations are usually performed assuming far-field interactions, although the actual calibration source may be well into the near-field

Proximity-Based Authentication for Mobile Devices

October 1, 2005
Author(s)
Wayne Jansen, Serban I. Gavrila, Vlad Korolev
While mobile handheld devices provide productivity benefits, they also pose new risks. User authentication is the best safeguard against the risk of unauthorized use and access to a device's contents. This paper describes two location-based user

Public Safety Wireless Technology Links

October 1, 2005
Author(s)
Leonard E. Miller
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

Quantum Computing with Realistically Noisy Devices

October 1, 2005
Author(s)
Emanuel H. Knill
There are quantum algorithms that can efficiently simulate quantum physics, factor large numbers and estimate integrals. As a result, quantum computers can solve otherwise intractable computational problems. One of the main problems of experimental quantum

Resource Planning and Bandwidth Allocation in Hybrid Fiber-Coax Residential Networks

October 1, 2005
Author(s)
David W. Griffith, Kotikalapudi Sriram, L Krivulina, Nada T. Golmie
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

Results of Some Applications using IEEE 802.15.4

October 1, 2005
Author(s)
David E. Cypher
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

RFID-Assisted Localization and Communications for First Responders

October 1, 2005
Author(s)
Leonard E. Miller
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

Selection of Alternatives to Liquid-in-Glass Thermometers

October 1, 2005
Author(s)
Dean C. Ripple, Gregory F. Strouse
A desire to increase automation or to eliminate the use of mercury has prompted several ASTM committees to consider alternatives to ASTM Liquid-in-Glass (LiG) thermometers. In this paper, we address the technical issues of choosing an alternative. We first

Smart Space Laboratory Website

October 1, 2005
Author(s)
Vincent M. Stanford
This paper demonstrates that, for large-scale tests, the match and non-match similarity scores have no specific underlying distribution function. The forms of these distribution functions require a nonparametric approach for the analysis of the fingerprint

Soft Decision Metrics for Turbo-Coded FH M-FSK Ad Hoc Packet Radio Networks

October 1, 2005
Author(s)
B M. Peric, Michael R. Souryal, E G. Larsson, B R. Vojcic
This paper addresses turbo-coded non-coherent FH M-FSK ad hoc networks with a Poisson distribution of interferers where multiple access interference can be modeled as symmetric a-stable (SaS) noise and a is inversely proportional to the path loss exponent

Software Assurances Metrics and Tool Evaluation

October 1, 2005
Author(s)
Paul E. Black
The National Software Reference Library (NSRL) of the U.S. National Institute of Standards and Technology (NIST) collects software from various sources and publishes file profiles computed from this software (such as MD5 and SHA-1 hashes) as a Reference

Stability of Global Entanglement in Thermal States of Spin Chains

October 1, 2005
Author(s)
Stephen Bullock, G K. Brennen
The n-qubit concurrence canonical decomposition (CCD) is a generalization of the two-qubit canonical decomposition SU(4)=[SU(2) (x) SU(2)] ? [SU(2) (x) SU(2)], where ? is the commutative group which phases the maximally entangled Bell basis. A prequel

Statistical Approaches in the NIST World Trade Center Analysis

October 1, 2005
Author(s)
James J. Filliben
The Federal Building and Fire Safety Investigation of the World Trade Center Disaster is currently essentially completed. The pre-collapse progression was extremely complicated, with structural, thermal, dynamic and stochastic interdependencies across time

Strategic Directions in Information and Knowledge Management

October 1, 2005
Author(s)
Stephen Quirolgico
We examine the performance of multimodal biometric authentication systems using state-of-the-art Commercial Off-the-Shelf (COTS) fingerprint and face biometric systems on a population approaching 1,000 individuals. Majority of prior studies of multimodal

The Application of MatML to Contaminant Emissions Data

October 1, 2005
Author(s)
E F. Begley, Cynthia H. Reed
Standard data formats are generally employed because they save time and money by promoting interoperability, i.e., facilitating data exchange and preserving information for re-use, and are available for a wide variety of business, scientific, and

The Mobicents Open SLEE Platform: Architecture, Implementation, and Programming

October 1, 2005
Author(s)
Mudumbai Ranganathan, I Ivanov, Francesco Moggia
We examine the performance of multimodal biometric authentication systems using state-of-the-art Commercial Off-the-Shelf (COTS) fingerprint and face biometric systems on a population approaching 1,000 individuals. Majority of prior studies of multimodal
Displaying 36301 - 36325 of 74151
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