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Displaying 26 - 35 of 35

On the Asymptotic Distribution of Sums of Independent Nonidentically Distributed Pareto Variates

March 1, 2002

Author(s)

Robert C. Hagwood

The sum of independent Pareto random variables with varying parameters are shown to converge to a stable distribution. This extends a result of Blum for i.i.d. Pareto random variables.

Evaluation of the Elevated Temperature Creep Strength of Three Lead-Free Solder Alloys in Soldered Joints

July 1, 2001

Author(s)

D A. Shepherd, Robert C. Hagwood, Richard J. Fields

Amendments to the Safe Drinking Water Act mandated that soldered joints used in potable water systems be free of lead. In addition to lead contents, allowable pressures used in potable water systems are directly related to the elevated temperature creep

Reliability of Conformance Tests

August 21, 1998

Author(s)

Robert C. Hagwood, Raghu N. Kacker, James H. Yen, D L. Banks, Lynne S. Rosenthal, Leonard J. Gallagher, Paul E. Black

A conformance test is a software assurance test that is applied in order to determine if specification requirements of the software are being met. It is a time-dependent model, where the software object is subjected to an a priori known test suite. The

Software Testing: Protocol Comparison

May 29, 1998

Author(s)

James H. Yen, D L. Banks, Leonard J. Gallagher, Paul E. Black, Robert C. Hagwood, Raghu N. Kacker, Lynne S. Rosenthal

Software testing is hard, expensive, and uncertain. Many protocols have been suggested, especially in the area of conformance verification. In order to compare the efficacy of these protocols, we have implemented a designed simulation experiment that

Software Testing by Statistical Methods - Preliminary Success Estimates for Approaches Based on Binomial Models, Coverage Designs, Mutation Testing, and Usage Models

March 1, 1998

Author(s)

D L. Banks, W H. Dashiell, Leonard J. Gallagher, Robert C. Hagwood, Raghu N. Kacker, Lynne S. Rosenthal

Software Testing by Statistical Methods: Preliminary Success Estimates for Approaches Based on Binomial Models, Coverage Designs, Mutation Testing, and Usage Models

March 1, 1998

Author(s)

D L. Banks, W H. Dashiell, Leonard J. Gallagher, Robert C. Hagwood, Raghu N. Kacker

This paper is a survey of the statistical methods relevant to Black-Box conformance testing. The methods are reviewed from the view point of their potential use in an ITL collaborative project.

Tomographic Reconstruction of the Local PDFS of Soot Volume Fraction and Temperature

April 23, 1995

Author(s)

Y. R. Sivathanu, Anthony Hamins, Robert Hagwood, Takashi Kashiwagi

Deconvolution of local properties from line-of-sight measurements is important in a wide variety of applications such as x-ray tomography, nuclear magnetic resonance imaging, atmospheric sciences, optical inteferometry and flow field diagnostics. The Radon

Dynamic Calibration for Instruments

Author(s)

Robert C. Hagwood

The NIST Pressure Measurements Division provides calibration service for pressure instruments that customers in turn use to calibrate other instruments. Often during their useable lifetime, these instruments are calibrated and recalibrated several times at

Dynamics of DNA in and Around a Nanopore

Author(s)

Robert C. Hagwood

Single stranded DNA is modeled as a flexible polymer. The motion of such DNA in a vessel partitioned by a membrane containing a cylindrical nanopore is modeled. Statistical quantities such as the probability that a polymer end is at the pore entrance at

Is Bonds Out

Author(s)

Robert C. Hagwood

In this paper, the cumulative home run rates of the 20 players with 500 or more home runs are analyzed. We show that Bonds and McGwire have cumulative totals that lie statistically outside the others in the study.