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Topic Area: Math

Displaying records 71 to 80 of 230 records.
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71. Assessing differences between results determined according to the Guide to the Expression of Uncertainty in Measurement
Series: Journal of Research (NIST JRES)
Topic: Math
Published: 12/1/2010
Authors: Raghu N Kacker, Ruediger Kessel, Klaus-Dieter Sommer
Abstract: When the data consist of multiple results of measurement for a common measurand, often one needs to determine whether the results agree with each other. A result of measurement based on the Guide to the Expression of Uncertainty in Measurement (GUM) ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906548

72. Derivation of Isosceles Trapezoidal Distribution
Topic: Math
Published: 12/1/2010
Authors: Raghu N Kacker, James F Lawrence
Abstract: It is known that, if the mid-point of a rectangular distribution is specified, the half-width is inexactly known, and the state of knowledge about the half-width may be represented by a narrower rectangular distribution then the resulting distributio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904335

73. Bochner Subordination, Logarithmic Diffusion Equations, and Blind Deconvolution of Hubble Space Telescope Imagery and Other Scientific Data
Topic: Math
Published: 11/30/2010
Author: Alfred S Carasso
Abstract: Generalized Linnik processes and associated logarithmic diffusion equations can be constructed by appropriate Bochner randomization of the time variable in Brownian motion and the related heat conduction equation. Remarkably, generalized Linnik char ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903667

74. Biological Cell Feature Identification by a Modified Watershed-Merging Algorithm
Series: NIST Interagency/Internal Report (NISTIR)
Topic: Math
Published: 11/24/2010
Authors: David E. Gilsinn, Kiran Bhadriraju, John T Elliott
Abstract: Biological cells are composed of many subsystems and organelles. The subsystem called the cytoskeleton is composed of long rod-shaped structures. They give the cell form and help attach the cell to the substrate and neighbors. One of the filaments is ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906615

75. Bicubic B-Spline Surface Approximation of Invariant Tori
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7731
Topic: Math
Published: 10/20/2010
Authors: Sita Ramamurti, David E. Gilsinn
Abstract: The invariant torus of a coupled system of Van der Pol oscillators is approximated using bicubic B-splines. The paper considers the case of strong nonlinear coupling. In particular, the shapes of invariant torii for the Van der Pol coupling parameter ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906906

76. A New Analysis of the False-Positive Rate of a Bloom Filter
Topic: Math
Published: 10/15/2010
Authors: Ken Christensen, Allen L Roginsky, Miguel Jimeno
Abstract: A Bloom filter is a space-efficient data structure used for probabilistic set membership testing. When testing an object for set membership, a Bloom filter may give a false positive. The analysis of the false positive rate is key to understanding the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903775

77. Modelling Type Ia Supernova Light Curves
Topic: Math
Published: 9/15/2010
Authors: Bert W Rust, Dianne M O'Leary, Katharine M Mullen
Abstract: Type Ia supernova light curves are characterized by a rapid rise from zero luminosity to a peak value, followed by a slower quasi-exponential decline. The rise and peak last for a few days, while the decline persists for many months. It is widely b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903019

78. Metrological Compatibility and Statistical Consistency
Topic: Math
Published: 9/5/2010
Authors: Raghu N Kacker, Ruediger Kessel, Klaus-Dieter Sommer, Xin Bian
Abstract: The traditional concept of consistency in multiple evaluations of the same measurand is statistical. The statistical view of consistency does not match the modern view of uncertainty in measurement; in particular, it does not apply to the results of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902441

79. Practical Near-Collisions for Reduced Round Blake, Fugue, Hamsi and JH
Topic: Math
Published: 8/23/2010
Authors: Meltem Sonmez Turan, Erdener Uyan
Abstract: A hash function is near-collision resistant, if it is hard to find two messages with hash values that differ in only small number of bits. In this study, we used hill climbing methods to find near-collisions for some of the second round SHA-3 candida ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905988

80. On Feedback Functions of Maximum Length Nonlinear Feedback Shift Registers
Topic: Math
Published: 8/2/2010
Authors: Cagdas Calik, Meltem Sonmez Turan, Ferruh Ozbudak
Abstract: Feedback shift registers are basic building blocks for many cryptographic primitives. Due to the insecurities of Linear Feedback Shift Register (LFSR) based systems, the use of Nonlinear Feedback Shift Registers (NFSRs) became more popular. In this w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905987



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