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Statistical Analysis- Accuracy of Volume Measurements in a Large Process Vessel

Description: At the request of Process Control Development, Chemical Development Operation, statistical assistance was provided by the Operations Research and Synthesis operation in the design and analysis of an experiment to determine how accurately volumes of solution in a large process vessel could be measured. A detailed discussion of the vessel calibration tests, the associated liquid level measuring equipment and the conclusions thereof are presented in HW-62049. The main purpose of this report is to … more
Date: October 1959
Creator: Hough, C. G.
Partner: UNT Libraries Government Documents Department
open access

Balance Calibration – A Method for Assigning a Direct-Reading Uncertainty to an Electronic Balance.

Description: Paper Title: Balance Calibration – A method for assigning a direct-reading uncertainty to an electronic balance. Intended Audience: Those who calibrate or use electronic balances. Abstract: As a calibration facility, we provide on-site (at the customer’s location) calibrations of electronic balances for customers within our company. In our experience, most of our customers are not using their balance as a comparator, but simply putting an unknown quantity on the balance and reading the displaye… more
Date: July 1, 2010
Creator: Stears, Mike
Partner: UNT Libraries Government Documents Department
open access

Optimal Extraction of Cosmological Information from Supernova Datain the Presence of Calibration Uncertainties

Description: We present a new technique to extract the cosmological information from high-redshift supernova data in the presence of calibration errors and extinction due to dust. While in the traditional technique the distance modulus of each supernova is determined separately, in our approach we determine all distance moduli at once, in a process that achieves a significant degree of self-calibration. The result is a much reduced sensitivity of the cosmological parameters to the calibration uncertainties.… more
Date: September 26, 2005
Creator: Kim, Alex G. & Miquel, Ramon
Partner: UNT Libraries Government Documents Department
open access

Method and Appartus for Calibrating a Linear Variable Differential Transformer

Description: A calibration apparatus for calibrating a linear variable differential transformer (LVDT) having an armature positioned in au LVDT armature orifice, and the armature able to move along an axis of movement. The calibration apparatus includes a heating mechanism with an internal chamber, a temperature measuring mechanism for measuring the temperature of the LVDT, a fixture mechanism with an internal chamber for at least partially accepting the LVDT and for securing the LVDT within the heating mec… more
Date: January 18, 2005
Creator: Pokrywka, Robert J.
Partner: UNT Libraries Government Documents Department
open access

General Guidelines for the On-Site Calibration of Humidity and Moisture Control Systems in Buildings

Description: Report issued by the National Bureau of Standards over calibration of indoor humidity and moisture control. Guidelines used for on-site calibration are discussed. This report includes tables, graphs, and illustrations.
Date: September 1983
Creator: Hyland, Richard W. & Hurley, C. Warren
Partner: UNT Libraries Government Documents Department
open access

AN ADVANCED CALIBRATION PROCEDURE FOR COMPLEX IMPEDANCE SPECTRUM MEASUREMENTS OF ADVANCED ENERGY STORAGE DEVICES

Description: With the increasing demand for electric and hybrid electric vehicles and the explosion in popularity of mobile and portable electronic devices such as laptops, cell phones, e-readers, tablet computers and the like, reliance on portable energy storage devices such as batteries has likewise increased. The concern for the availability of critical systems in turn drives the availability of battery systems and thus the need for accurate battery health monitoring has become paramount. Over the past d… more
Date: June 1, 2012
Creator: Morrison, William H.; Christophersen, Jon P.; Bald, Patrick & Morrison, John L.
Partner: UNT Libraries Government Documents Department
open access

Calibration of 3D Upper Mantle Structure in Eurasia Using Regional and Teleseismic Full Waveform Seismic Data

Description: Adequate path calibrations are crucial for improving the accuracy of seismic event location and origin time, size, and mechanism, as required for CTBT monitoring. There is considerable information on structure in broadband seismograms that is currently not fully utilized. The limitations have been largely theoretical. the development and application to solid earth problems of powerful numerical techniques, such as the Spectral Element Method (SEM), has opened a new era, and theoretically, it sh… more
Date: April 23, 2005
Creator: Romanowicz, Barbara & Panning, Mark
Partner: UNT Libraries Government Documents Department
open access

Calibration of 3D Upper Mantle Structure in Eurasia Using Regional and Teleseismic Full Waveform Seismic Data

Description: Adequate path calibrations are crucial for improving the accuracy of seismic event location and origin time, size, and mechanism, as required for CTBT monitoring. There is considerable information on structure in broadband seismograms that is currently not fully utilized. The limitations have been largely theoretical. the development and application to solid earth problems of powerful numerical techniques, such as the Spectral Element Method (SEM), has opened a new era, and theoretically, it sh… more
Date: April 23, 2005
Creator: Romanowicz, Barbara & Panning, Mark
Partner: UNT Libraries Government Documents Department
open access

Quantification of uncertainty in machining operations for on-machine acceptance.

Description: Manufactured parts are designed with acceptance tolerances, i.e. deviations from ideal design conditions, due to unavoidable errors in the manufacturing process. It is necessary to measure and evaluate the manufactured part, compared to the nominal design, to determine whether the part meets design specifications. The scope of this research project is dimensional acceptance of machined parts; specifically, parts machined using numerically controlled (NC, or also CNC for Computer Numerically Con… more
Date: September 1, 2008
Creator: Claudet, Andre A.; Tran, Hy D. & Su, Jiann-Chemg
Partner: UNT Libraries Government Documents Department
open access

FY2008 Calibration Systems Final Report

Description: The Calibrations project has been exploring alternative technologies for calibration of passive sensors in the infrared (IR) spectral region. In particular, we have investigated using quantum cascade lasers (QCLs) because these devices offer several advantages over conventional blackbodies such as reductions in size and weight while providing a spectral source in the IR with high output power. These devices can provide a rapid, multi-level radiance scheme to fit any nonlinear behavior as well a… more
Date: January 1, 2009
Creator: Cannon, Bret D.; Myers, Tanya L. & Broocks, Bryan T.
Partner: UNT Libraries Government Documents Department
open access

Validation and Calibration of Nuclear Thermal Hydraulics Multiscale Multiphysics Models - Subcooled Flow Boiling Study

Description: In addition to validation data plan, development of advanced techniques for calibration and validation of complex multiscale, multiphysics nuclear reactor simulation codes are a main objective of the CASL VUQ plan. Advanced modeling of LWR systems normally involves a range of physico-chemical models describing multiple interacting phenomena, such as thermal hydraulics, reactor physics, coolant chemistry, etc., which occur over a wide range of spatial and temporal scales. To a large extent, the … more
Date: September 1, 2013
Creator: Bui, Anh; Dinh, Nam & Williams, Brian
Partner: UNT Libraries Government Documents Department
open access

Computed Tomography (CT) Standards

Description: There is currently no standardized method to check the measurement capabilities of computed tomography (CT) systems within industry. The current method to determine the functionality of CT systems is by use of a test phantom to represent the actual part to be tested. A standard method to check the software algorithms when measuring such parameters as density of a material and the size of an object is not readily available. Many different materials are evaluated by CT systems. A set of standards… more
Date: February 2, 2000
Creator: Hubert, R. R. & Beach, J. M.
Partner: UNT Libraries Government Documents Department
open access

High Accuracy Wavelength Calibration For A Scanning Visible Spectrometer

Description: Spectroscopic applications for plasma velocity measurements often require wavelength accuracies ≤ 0.2Â. An automated calibration for a scanning spectrometer has been developed to achieve a high wavelength accuracy overr the visible spectrum, stable over time and environmental conditions, without the need to recalibrate after each grating movement. The method fits all relevant spectrometer paraameters using multiple calibration spectra. With a steping-motor controlled sine-drive, accuracies of ~… more
Date: July 29, 2010
Creator: Scotti, Filippo & Bell, Ronald
Partner: UNT Libraries Government Documents Department
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