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Displaying 351 - 375 of 446

Minimum-Phase Calibration of Sampling Oscilloscopes

August 15, 2006
Author(s)
Andrew M. Dienstfrey, Paul D. Hale, Darryl A. Keenan, Tracy S. Clement, Dylan F. Williams
We describe an algorithm for determining the minimum phase of a linear time-invariant response function from its magnitude. The procedure is based on Kramers Kronig relations in combination with auxiliary direct measurements of the desired phase response

Calculation of the uncertainty of the mean of autocorrelated measurements

August 4, 2006
Author(s)
Nien-Fan Zhang
When repeated measurements are autocorrelated, it is not appropriate to use the traditional approach to calculate the uncertainty of the average of the measurements, which assumes that the measurements are statistically independent. In this paper, we

Pseudo-Exhaustive Testing for Software

April 28, 2006
Author(s)
David R. Kuhn, Vadim Okun
Pseudo-exhaustive testing uses the empirical observation that, for broad classes of software, a fault is likely triggered by only a few variables interacting. The method takes advantage of two relatively recent advances in software engineering: algorithms

Bayesian Alternative to the Guide's Use of the Welch-Satterthwaite Formula

January 3, 2006
Author(s)
Raghu N. Kacker
The Guide to the Expression of Uncertainty in Measurement suggests that to account for the statistical uncertainty in a combined standard uncertainty that arises when one or more of its components are evaluated from a limited number of independent normally

Coefficient of Contribution to the Combined Standard Uncertainty

January 1, 2006
Author(s)
Raghu N. Kacker, Rudiger Kessel, Michael Berglund
The International Organization for Standardization (ISO) Guide to the Expression of Uncertainty in Measurement (GUM) describes a generic procedure for determining an estimate for the measurand and its associated combined standard uncertainty from the

Construction Object Identification from LADAR Scans: An Experimental Study Using I-Beams

December 15, 2005
Author(s)
David E. Gilsinn, Geraldine S. Cheok, Christoph J. Witzgall, Alan M. Lytle
Laser Scanning devices (LADAR for Laser Detection and Ranging) are used in construction projects to capture as-built data. They can rapidly generate large unstructured point clouds. This study describes an experiment in which an I-beam on a concrete floor

Uncertainties in Scaling Factors for Ab Intio Vibrational Frequencies

August 26, 2005
Author(s)
K Irikura, R Johnson, Raghu N. Kacker
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

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

The Fast Fourier Transform for Experimentalists, Part I: Concepts

April 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
Displaying 351 - 375 of 446