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Topic Area: Modeling
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Displaying records 91 to 100 of 137 records.
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91. Detecting Cooling Coil Fouling Automatically-Part 1: A Novel Concept
Topic: Modeling
Published: 7/1/2010
Author: Daniel A Veronica
Abstract: Fouling of surfaces within the heat exchangers of heating, ventilating, and air conditioning (HVAC) systems of buildings is an equipment fault that wastes appreciable amounts of energy, however, it escapes detection under current building automation ...

92. Estimating Volumes of Near-spherical Molded Artifacts
Series: Journal of Research (NIST JRES)
Topic: Modeling
Published: 5/3/2010
Authors: David E. Gilsinn, Bruce R. Borchardt, Amelia Tebbe
Abstract: The Food and Drug Administration (FDA) is conducting research on developing reference lung cancer cancer lesions, called phantoms, to test computed tomography (CT) scanners and their software. FDA loaned two semi-spherical phantoms to the National In ...

93. Onset of Convection in Binary Liquid Layers
Topic: Modeling
Published: 3/24/2010
Authors: Geoffrey B McFadden, Sam Ray Coriell, Aaron Lott
Abstract: We perform linear stability calculations for horizontal bilayers of a two-component fluid that can undergo a phase transformation, taking into account both buoyancy effects and thermocapillary effects in the presence of a vertical temperature gradien ...

94. The Solidification of an Ideal Ternary Alloy in a Mushy Layer
Topic: Modeling
Published: 3/24/2010
Authors: Daniel M Anderson, Geoffrey B McFadden, Sam Ray Coriell, Bruce Murray
Abstract: We consider a model for the solidification of an ideal ternary alloy in a mushy layer that incorporates the effects thermal and solutal diffusion, convection and solidification. Our results reveal that although the temperature and solute fields are ...

95. An Approximation Algorithm for the Coefficients of the Reliability Polynomial
Topic: Modeling
Published: 3/15/2010
Authors: Brian Dale Cloteaux, Isabel M Beichl, F Sullivan
Abstract: The reliability polynomial gives the probability that a graph remains connected given that each edge in it can fail independently with a probability p. While in general determining the coefficients of this polynomial is #P-complete, we give a randomi ...

96. The DEMO Quasisymmetric Stellarator
Topic: Modeling
Published: 2/26/2010
Authors: Paul R. Garabedian, Geoffrey B McFadden
Abstract: The NSTAB code solves differential equations in conservation form, and the TRAN test particle code tracks guiding center orbits in a fixed background, to provide simulations of equilibrium, stability, and transport in tokamaks and stellarators. These ...

97. Predicted Functions of MdmX in Fine Tuning the Response of p53 to DNA Damage
Topic: Modeling
Published: 2/1/2010
Authors: Sohyoung Kim, Mirit I Aladjem, Geoffrey B McFadden, Kurt W Kohn
Abstract: Tumor suppressor protein p53 is negatively regulated by two structurally homologous proteins, Mdm2 and MdmX. In contrast to Mdm2, MdmX lacks ubiquitin ligase activity. Although the essential interactions of MdmX are known, it is not clear how they fu ...

98. A Structural Approach to the Temporal Modeling of Networks
Topic: Modeling
Published: 12/14/2009
Authors: Brian Dale Cloteaux, Isabel M Beichl
Abstract: Simulation of many dynamic real world systems such as the Internet and social networks requires developing dynamic models for the underlying networks in these systems. Currently, there is a large body of work devoted towards determining the underlyin ...

99. Artificial Intelligence Tools for Failure Event Data Management and Probability Risk Analysis for Failure Prevention
Topic: Modeling
Published: 10/25/2009
Authors: Jeffrey T Fong, Pedro Vincente Marcal
Abstract: Over the last thirty years, much research has been done on the development of failure event databases and fatigue modeling of crack growth in pressure vessels and piping. According to a USNRC report (NUREG/CR6674, 2000), results of a fatigue crack g ...

100. Measuring the Utility/Path Diversity Tradeoff in Multipath Protocols
Topic: Modeling
Published: 10/20/2009
Authors: Fern Y Hunt, Vladimir V Marbukh
Abstract: We derive a model of congestion control where the trade-off between utility and path diversity can be investigated. In a network where there can be multiple routes between locations, each source is assigned a route according to a random allocation s ...

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