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You searched on: Author: andrew rukhin

Displaying records 21 to 30 of 54 records.
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21. Reducing Data Nonconformity in Linear Models
Published: 1/3/2011
Author: Andrew L Rukhin
Abstract: Stein phenomenon Summary Several procedures designed to reduce nonconformity in interlaboratory studies by shrinking data toward a consensus matrix weighted mean are suggested. Some of them are shown to have a smaller quadratic risk than the vector s ...

22. Laplace Random Effects Models for Interlaboratory Studies
Published: 11/25/2010
Authors: Andrew L Rukhin, Antonio M Possolo
Abstract: A model is introduced for measurements obtained in collaborative interlaboratory studies, comprising measurement errors and random laboratory effects that have Laplace distributions, possibly with heterogeneous, laboratory-specific variances. Estima ...

23. A Statistical Test Suite for Random and Pseudorandom Number Generators for Cryptographic Applications
Series: Special Publication (NIST SP)
Report Number: 800-22 Rev 1a
Published: 9/16/2010
Authors: Lawrence E Bassham, Andrew L Rukhin, Juan Soto, James R Nechvatal, Miles E. Smid, Stefan D Leigh, M Levenson, M Vangel, Nathanael A Heckert, D L. Banks
Abstract: This paper discusses some aspects of selecting and testing random and pseudorandom number generators. The outputs of such generators may be used in many cryptographic applications, such as the generation of key material. Generators suitable for use i ...

24. Confidence Regions for Parameters of Linear Models
Published: 4/1/2010
Author: Andrew L Rukhin
Abstract: A method is suggested for constructing a conservative confidence region for the parameters of a general linear model. In meta-analytical applications, when the results of independent but heterogeneous studies are to be combined, this region can be em ...

25. Joint Distribution of Pattern Frequencies and Multivariate Polya-Aeppli Law
Published: 1/14/2010
Author: Andrew L Rukhin
Abstract: This paper studies the joint distribution of frequencies of several overlapping words in a Markov sequence. Usually, characteristics of this distribution are expressed in terms of so-called pattern correlation matrix. A more direct approach allows fo ...

26. Sequential Testing to Guarantee The Necessary Sample Size in Clinical Trials
Published: 1/1/2010
Author: Andrew L Rukhin
Abstract: The paper addresses the sequential sampling issues related to attainment of a given number of events in a Poisson process. The problem of guaranteeing the necessary sample size is formulated as that of open-ended hypothesis testing in which one has ...

27. Conservative Confidence Ellipsoids for Linear Model Parameters
Published: 12/1/2009
Author: Andrew L Rukhin
Abstract: This paper studies properties of conservative confidence ellipsoids for parameters of a general linear model. These regions are obtained on the basis of a linear estimator when only a vague knowledge of (heterogeneous) error variances is available ...

28. Weighted Means Statistics in Interlaboratory Studies
Published: 5/6/2009
Author: Andrew L Rukhin
Abstract: The usefulness of weighted means statistics as a consensus mean estimator in collaborative studies is discussed. A random effects model designed to combine information from several sourcesis employed to justify their appeal to metrologists. Some met ...

29. Identities for Negative Moments of Quadratic Forms in Normal Variables
Published: 4/15/2009
Author: Andrew L Rukhin
Abstract: Two formulae for the central inverse moments of a Quadratic form in normal variables and of the ratio forms are established.  They relate the quadratic form determined by a positive definite matrix to that defined by the inverse matrix.

30. Report on Acceleration Comparison SIM.AUV.V-K1 - Draft B
Published: 3/20/2009
Authors: David J. Evans, Adriana Hornikova, Stefan D Leigh, Andrew L Rukhin, William E Strawderman
Abstract: The first regional key comparison in vibration conducted under the auspices of the Inter-American System of Metrology (SIM) was begun in 1996. The comparison was registered with the International Bureau of Weights and Measures (BIPM) through the Con ...

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  • SP 250-XX: Calibration Services
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  • SP 300-XX: Precision Measurement and Calibration
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