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Evaluating spatial patterns of seasonal ozone exposure and incidence of respiratory emergency room visits in Dallas-Fort Worth

Description: This article examines the relationships between spatial patterns of long-term ozone exposure and respiratory illness within Dallas-Fort Worth to better understand impacts on health outcomes.
Date: April 13, 2021
Creator: Northeim, Kari; Marks, Constant & Tiwari, Chetan
Item Type: Refine your search to only Article
Partner: University of North Texas
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Final Report for "Analyzing and visualizing next generation climate data"

Description: The project "Analyzing and visualizing next generation climate data" adds block-structured (mosaic) grid support, parallel processing, and 2D/3D curvilinear interpolation to the open-source UV-CDAT climate data analysis tool. Block structured grid support complies to the Gridspec extension submitted to the Climate and Forecast metadata conventions. It contains two parts: aggregation of data spread over multiple mosaic tiles (M-SPEC) and aggregation of temporal data stored in different files (F-… more
Date: November 13, 2012
Creator: Pletzer, Alexander
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Atmospheric PSF Interpolation for Weak Lensing in Short Exposure Imaging Data

Description: A main science goal for the Large Synoptic Survey Telescope (LSST) is to measure the cosmic shear signal from weak lensing to extreme accuracy. One difficulty, however, is that with the short exposure time ({approx_equal}15 seconds) proposed, the spatial variation of the Point Spread Function (PSF) shapes may be dominated by the atmosphere, in addition to optics errors. While optics errors mainly cause the PSF to vary on angular scales similar or larger than a single CCD sensor, the atmosphere … more
Date: September 19, 2012
Creator: Chang, C.; Marshall, P.J.; Jernigan, J.G.; Peterson, J.R.; Kahn, S.M.; Gull, S.F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Basics of Polar-Format algorithm for processing Synthetic Aperture Radar images.

Description: The purpose of this report is to provide a background to Synthetic Aperture Radar (SAR) image formation using the Polar Format (PFA) processing algorithm. This is meant to be an aid to those tasked to implement real-time image formation using the Polar Format processing algorithm.
Date: May 1, 2012
Creator: Doerry, Armin Walter
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Methods for Quantifying Shallow-Water Habitat Availability in the Missouri River

Description: As part of regulatory requirements for shallow-water habitat (SWH) restoration, the U.S. Army Corps of Engineers (USACE) completes periodic estimates of the quantity of SWH available throughout the lower 752 mi of the Missouri River. To date, these estimates have been made by various methods that consider only the water depth criterion for SWH. The USACE has completed estimates of SWH availability based on both depth and velocity criteria at four river bends (hereafter called reference bends), … more
Date: April 9, 2012
Creator: Hanrahan, Timothy P. & Larson, Kyle B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geometric Integration Of The Vlasov-Maxwell System With A Variational Particle-in-cell Scheme

Description: A fully variational, unstructured, electromagnetic particle-in-cell integrator is developed for integration of the Vlasov-Maxwell equations. Using the formalism of Discrete Exterior Calculus [1], the field solver, interpolation scheme and particle advance algorithm are derived through minimization of a single discrete field theory action. As a consequence of ensuring that the action is invariant under discrete electromagnetic gauge transformations, the integrator exactly conserves Gauss's law.
Date: March 27, 2012
Creator: Squire, J.; Qin, H. & Tang, W. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Including shielding effects in application of the TPCA method for detection of embedded radiation sources.

Description: Conventional full spectrum gamma spectroscopic analysis has the objective of quantitative identification of all the radionuclides present in a measurement. For low-energy resolution detectors such as NaI, when photopeaks alone are not sufficient for complete isotopic identification, such analysis requires template spectra for all the radionuclides present in the measurement. When many radionuclides are present it is difficult to make the correct identification and this process often requires ma… more
Date: December 1, 2011
Creator: Johnson, William C. & Shokair, Isaac R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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RACORO aerosol data processing

Description: The RACORO aerosol data (cloud condensation nuclei (CCN), condensation nuclei (CN) and aerosol size distributions) need further processing to be useful for model evaluation (e.g., GCM droplet nucleation parameterizations) and other investigations. These tasks include: (1) Identification and flagging of 'splash' contaminated Twin Otter aerosol data. (2) Calculation of actual supersaturation (SS) values in the two CCN columns flown on the Twin Otter. (3) Interpolation of CCN spectra from SGP and … more
Date: October 31, 2011
Creator: Andrews, Elisabeth
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
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COMBINE7.1 - A Portable ENDF/B-VII.0 Based Neutron Spectrum and Cross-Section Generation Program

Description: COMBINE7.1 is a FORTRAN 90 computer code that generates multigroup neutron constants for use in the deterministic diffusion and transport theory neutronics analysis. The cross-section database used by COMBINE7.1 is derived from the Evaluated Nuclear Data Files (ENDF/B-VII.0). The neutron energy range covered is from 20 MeV to 1.0E-5 eV. The Los Alamos National Laboratory NJOY code is used as the processing code to generate a 167 fine-group cross-section library in MATXS format for Bondarenko se… more
Date: September 1, 2011
Creator: Yoon, Woo Y. & Nigg, David W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of advanced UQ for CRUD prediction with VIPRE.

Description: This document summarizes the results from a level 3 milestone study within the CASL VUQ effort. It demonstrates the application of 'advanced UQ,' in particular dimension-adaptive p-refinement for polynomial chaos and stochastic collocation. The study calculates statistics for several quantities of interest that are indicators for the formation of CRUD (Chalk River unidentified deposit), which can lead to CIPS (CRUD induced power shift). Stochastic expansion methods are attractive methods for un… more
Date: September 1, 2011
Creator: Eldred, Michael Scott
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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LIP: The Livermore Interpolation Package, Version 1.4

Description: This report describes LIP, the Livermore Interpolation Package. Because LIP is a stand-alone version of the interpolation package in the Livermore Equation of State (LEOS) access library, the initials LIP alternatively stand for the 'LEOS Interpolation Package'. LIP was totally rewritten from the package described in [1]. In particular, the independent variables are now referred to as x and y, since the package need not be restricted to equation of state data, which uses variables {rho} (densit… more
Date: July 6, 2011
Creator: Fritsch, F N
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PHISICS: New Features and Advancements

Description: The PHISICS (Parallel and Highly Innovative Simulation for INL Code System) software is under an intensive development at INL. In the last months new features have been added and improvements of the previously existing one performed. The modular approach has created a friendly development environment that allows a quick expansion of the capabilities. In the last months a little amount of work has been dedicated to the improvement of the spherical harmonics based nodal transport solver while the… more
Date: June 1, 2011
Creator: Rabiti, C.; Wang, Y.; Palmiotti, G.; Hiruta, H.; Cogliati, J.; Alfonsi, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Physics: A New Reactor Physics Analysis Toolkit

Description: In the last year INL has internally pursued the development of a new reactor analysis tool: PHISICS. The software is built in a modular approach to simplify the independent development of modules by different teams and future maintenance. Most of the modules at the time of this summary are still under development (time dependent transport driver, depletion, cross section I/O and interpolation, generalized perturbation theory), while the transport solver INSTANT (Intelligent Nodal and Semi-struc… more
Date: June 1, 2011
Creator: Rabiti, C.; Wang, Y.; Palmiotti, G.; Hiruta, H.; Cogliati, J. & Alfonsi, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CAD-centric Computation Management System for a Virtual TBM

Description: HyPerComp Inc. in research collaboration with TEXCEL has set out to build a Virtual Test Blanket Module (VTBM) computational system to address the need in contemporary fusion research for simulating the integrated behavior of the blanket, divertor and plasma facing components in a fusion environment. Physical phenomena to be considered in a VTBM will include fluid flow, heat transfer, mass transfer, neutronics, structural mechanics and electromagnetics. We seek to integrate well established (th… more
Date: May 3, 2011
Creator: Munipalli, Ramakanth; Szema, K. Y.; Huang, P. Y.; Rowell, C. M.; Ying, A. & Abdou, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement and Modeling of Solar and PV Output Variability: Preprint

Description: This paper seeks to understand what temporal and spatial scales of variability in global horizontal radiation are important to a PV plants and what measurements are needed to be able to characterize them. As solar radiation measuring instruments are point receivers it is important to understand how those measurements translate to energy received over a larger spatial extent. Also of importance is the temporal natural of variability over large spatial areas. In this research we use high temporal… more
Date: April 1, 2011
Creator: Sengupta, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ANALYSIS OF NSLS-II TOUSCHEK LIFETIME

Description: As scrapers are adopted for the loss control of NSLS-II storage ring, Touschek lifetime estimations for various cases are required to assure the stable operation. However, to estimate the Touschek lifetime, momentum apertures should be measured all along the ring and, if we want to estimate the lifetime in various situations, it can take extremely long time. Thus, rather than simulating for each case, a semi-analytic methods with the interpolations are used for the measurements of the momentum … more
Date: March 28, 2011
Creator: Choi, J. & Kramer, S. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LIP: The Livermore Interpolation Package, Version 1.3

Description: This report describes LIP, the Livermore Interpolation Package. Because LIP is a stand-alone version of the interpolation package in the Livermore Equation of State (LEOS) access library, the initials LIP alternatively stand for the ''LEOS Interpolation Package''. LIP was totally rewritten from the package described in [1]. In particular, the independent variables are now referred to as x and y, since the package need not be restricted to equation of state data, which uses variables {rho} (dens… more
Date: January 4, 2011
Creator: Fritsch, F N
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Efficient algorithm for generating spectra using line-by-lne methods

Description: A method is presented for efficient generation of spectra using line-by-line approaches. The only approximation is replacing the line shape function with an interpolation procedure, which makes the method independent of the line profile functional form. The resulting computational savings for large number of lines is proportional to the number of frequency points in the spectral range. Therefore, for large-scale problems the method can provide speedups of two orders of magnitude or more. A meth… more
Date: November 1, 2010
Creator: Sonnad, V. & Iglesias, C. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Accuracy Based Generation of Thermodynamic Properties for Light Water in RELAP5-3D

Description: RELAP5-3D interpolates to obtain thermodynamic properties for use in its internal calculations. The accuracy of the interpolation was determined for the original steam tables currently used by the code. This accuracy evaluation showed that the original steam tables are generally detailed enough to allow reasonably accurate interpolations in most areas needed for typical analyses of nuclear reactors cooled by light water. However, there were some regions in which the original steam tables were j… more
Date: September 1, 2010
Creator: Davis, Cliff B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Stochastic estimation of aquifer geometry using seismic refraction data with borehole depth constraints

Description: We develop a Bayesian model to invert surface seismic refraction data with depth constraints from boreholes for characterization of aquifer geometry and apply it to seismic and borehole datasets collected at the contaminated Oak Ridge National Laboratory site in Tennessee. Rather than the traditional approach of first inverting the seismic arrival times for seismic velocity and then using that information to aid in the spatial interpolation of wellbore data, we jointly invert seismic first arri… more
Date: September 1, 2010
Creator: Chen, J.; Hubbard, S. S.; Gaines, D.; Korneev, V.; Baker, G. & Watson, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The OVIS analysis architecture.

Description: This report summarizes the current statistical analysis capability of OVIS and how it works in conjunction with the OVIS data readers and interpolators. It also documents how to extend these capabilities. OVIS is a tool for parallel statistical analysis of sensor data to improve system reliability. Parallelism is achieved using a distributed data model: many sensors on similar components (metaphorically sheep) insert measurements into a series of databases on computers reserved for analyzing th… more
Date: July 1, 2010
Creator: Mayo, Jackson R.; Gentile, Ann C.; Brandt, James M.; De Sapio, Vincent; Thompson, David C.; Roe, Diana C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New Particle-in-Cell Code for Numerical Simulation of Coherent Synchrotron Radiation

Description: We present a first look at the new code for self-consistent, 2D simulations of beam dynamics affected by the coherent synchrotron radiation. The code is of the particle-in-cell variety: the beam bunch is sampled by point-charge particles, which are deposited on the grid; the corresponding forces on the grid are then computed using retarded potentials according to causality, and interpolated so as to advance the particles in time. The retarded potentials are evaluated by integrating over the 2D … more
Date: May 1, 2010
Creator: Balsa Terzic, Rui Li
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Petascale Computing Enabling Technologies Project Final Report

Description: The Petascale Computing Enabling Technologies (PCET) project addressed challenges arising from current trends in computer architecture that will lead to large-scale systems with many more nodes, each of which uses multicore chips. These factors will soon lead to systems that have over one million processors. Also, the use of multicore chips will lead to less memory and less memory bandwidth per core. We need fundamentally new algorithmic approaches to cope with these memory constraints and the … more
Date: February 14, 2010
Creator: de Supinski, B R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Construction of Large Period Symplectic Maps by Interpolative Methods

Description: The goal is to construct a symplectic evolution map for a large section of an accelerator, say a full turn of a large ring or a long wiggler. We start with an accurate tracking algorithm for single particles, which is allowed to be slightly non-symplectic. By tracking many particles for a distance S one acquires sufficient data to construct the mixed-variable generator of a symplectic map for evolution over S, given in terms of interpolatory functions. Two ways to find the generator are conside… more
Date: December 17, 2009
Creator: Warnock, Robert; Cai, Yunhai & Ellison, James A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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