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Displaying 36876 - 36900 of 74377

Overview of the TREC 2004 Question Answering Track

August 1, 2005
Author(s)
Ellen M. Voorhees
The TREC 2004 Question Answering track contained a single task in which question series were used to define a set of targets. Each series contained factoid and list questions and related to a single target. The final question in the series was an Other

Overview of the TREC 2004 Robust Retrieval Track

August 1, 2005
Author(s)
Ellen M. Voorhees
The robust retrieval track explores methods for improving the consistency of retrieval technology by focusing on poorly performing topics. The retrieval task in the track is a traditional ad hoc retrieval task where the evaluation methodology emphasizes a

Overview of TREC 2004

August 1, 2005
Author(s)
Ellen M. Voorhees
This report provides an overview of the thirteenth Text REtrieval Conference, TREC 2004. TREC 2004 was held at the National Institute of Standards and Technology (NIST) November~16--19, 2004. The conference was co-sponsored by NIST, the U.S. Department of

Pore Pressure in High-Strength Concrete at High Temperature

August 1, 2005
Author(s)
Long T. Phan
This paper presents results of an experimental program to study the effects of elevated temperature exposure on pore pressure buildup and potential for explosive spalling in normal strength (NSC) and high-strength concrete (HSC). Thermally-induced pore

R-22 Replacement Status (in Polish)

August 1, 2005
Author(s)
J M. Calm, Piotr A. Domanski
Since its initial recognition in 1928 and commercialization in 1936, R-22 has been applied in systems ranging from the smallest window air conditioners to the largest chillers and heat pumps, including those for district cooling and heating. Individual

Response to Fire Exposure of the Pentagon Structural Elements

August 1, 2005
Author(s)
Paul K. Mlakar, D O. Dusenberry, J R. Harris, G A. Haynes, Long Phan, M A. Sozen
An overview of fire damage sustained by the Pentagon structural elements in the September 11, 2001, terrorist attack is provided. The fire intensity in some compartments of the affected areas inside the Pentagon was approximated to be between those of the

September 11, 2001, Airliner Crash Into the Pentagon

August 1, 2005
Author(s)
Paul K. Mlakar, D O. Dusenberry, J R. Harris, G A. Haynes, Long Phan, M A. Sozen
The Pentagon was constructed between September 1941 and January 1943. A substantial renovation of the entire 6.6 million sq ft (610 thousand sq m) facility began in 1999 and is scheduled for completion in 2010. On September 11, 2001, a hijacked commercial

Similarity Based Retrieval from a 3D Human Database

August 1, 2005
Author(s)
Afzal A. Godil, Sanford P. Ressler
In this paper, we describe a framework for similarity based retrieval from a 3D human database. Our technique is based on both body and head shape representation and retrieval based on similarity of both of them. The 3D human database used in our study is

Sources of Uncertainties in Prompt Gamma-Ray Activation Analysis

August 1, 2005
Author(s)
Elizabeth A. Mackey, Rick L. Paul, Richard M. Lindstrom, David L. Anderson
Two prompt gamma-ray activation analysis (PGAA) facilities at the NIST Center for Neutron Research have been used routinely to perform elemental analyses of a variety of materials. Results from these analyses are usually expressed as mass fraction values

Stabilization of SPRTs for ITS-90 Calibrations

August 1, 2005
Author(s)
Dennis B. Minor, Gregory F. Strouse
At the National Institute of Standards and Technology (NIST), the ITS-90 calibration of standard platinum resistance thermometers (SPRTs) is performed in the Platinum Resistance Thermometer Calibration Laboratory over the temperature range from -189 C to

Stress Testing a Supply Chain Using Simulation

August 1, 2005
Author(s)
Sanjay Jain, Swee K. Leong
Simulation provides the capability to evaluate performance of a system operating under current or proposed configura-tions, policies and procedures. It is very applicable to evaluation of strategic and operational level plans for sup-ply chains. It is

Testing Web Applications by Modeling with FSMs

August 1, 2005
Author(s)
A Andrews, A. J. Offutt, R Alexander
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

The Fast Fourier Transform for Experimentalists Part II: Convolutions

August 1, 2005
Author(s)
D Donnelly, Bert W. Rust
The discrete Fourier transform (DFT) is a widely used tool for the analysis of measured time series data. The Cooley-Tukey fast Fourier transform (FFT) algorithm gives an extremely fast and efficient implementation of the DFT. This is the first of a series

Workshop on Reliability Issues in Nanomaterials

August 1, 2005
Author(s)
Robert Keller, David T. Read, Roop L. Mahajan
The Workshop on Reliability Issues in Nanomaterials was held at the Boulder Laboratories of the National Institute of Standards and Technology (NIST) on August 17-19, 2004. It was designed to promote a particular subset of NIST?s responsibilities under the
Displaying 36876 - 36900 of 74377
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