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in subjects: "Uncertainty"

open access

Changing Landscape of Scholarly Communications: Open Access

The 17th International Conference on Knowledge Management was held in the historic city of Potsdam, Germany. Since the conference was among the first post-pandemic face to face conferences, the overall theme of the 17th edition of the ICKM conference rightly focused on “Knowledge, Uncertainty and Risks: From individual to global scale” at different levels of analysis and agency. This document highlighted one of the panels and the panelists argue that open access to scholarly knowledge productio… more

Date: June 2022

Creator: Alemneh, Daniel Gelaw; Hawamdeh, Suliman M.; Fourie, Ina; Rorissa, Abebe; Ford, Angela & Assefa, Shimelis

Item Type: Book

Partner: UNT College of Information

Elicitation of Tacit Knowledge Inside a Clinical Process Using the FRAM

The 17th International Conference on Knowledge Management was held in the historic city of Potsdam, Germany. Since the conference was among the first post-pandemic face to face conferences, the overall theme of the 17th edition of the ICKM conference rightly focused on “Knowledge, Uncertainty and Risks: From individual to global scale” at different levels of analysis and agency. This poster highlights the qualitative study which was conducted in a major regional hospital in Germany, using the F… more

Date: June 2022

Creator: Aschwer, Carmen; Mühlbradt, Thomas; Unger, Helga; Fastner, Christian; Schröder, Stefan & Speer, Tillmann

Item Type: Poster

Partner: UNT College of Information

open access

Rate Coeﬃcient Measurements and Theoretical Analysis of the OH + (E)‑CF₃CH==CHCF₃ Reaction

Rate coeﬃcients, k, for the gas-phase reaction of the OH radical with (E)CF3CHCHCF3 ((E)-1,1,1,4,4,4-hexaﬂuoro-2-butene, HFO-1336mzz(E)) were measured over a range of temperatures (211−374 K) and bath gas pressures (20−300 Torr; He, N2) using a pulsed laser photolysis−laser-induced ﬂuorescence (PLP−LIF) technique. k1(T) was independent of pressure over this range of conditions with k1(296 K) = (1.31 ± 0.15) × 10−13 cm3 molecule−1 s−1 and k1(T) = (6.94 ± 0.80) × 10−13exp[−(496 ± 10)/T] cm 3 mol… more

Date: March 22, 2018

Creator: Baasandorj, Munkhbayar; Marshall, Paul; Waterland, Robert L.; Ravishankara, A. R. & Burkholder, James B. (James Bart), 1954-

Item Type: Article

Partner: UNT College of Science

open access

Increasing Information Certainty for Post-Traumatic Growth

Trauma, and its associated effects, can be conceptualized as a period of information uncertainty. The natural psychological response to trauma is a period of post-traumatic stress. Trauma occurs when an existing knowledge base has been challenged. Any event that challenges important components of an individual’s assumptive world is said to be traumatic. This post-traumatic period is akin to many theories and concepts in information science including uncertainty reduction, Everyday Life Informat… more

Date: June 2022

Creator: Bank, Nicole & Allen, Jeff M., 1968-

Item Type: Text

Partner: UNT College of Information

open access

Measures of agreement between computation and experiment:validation metrics.

With the increasing role of computational modeling in engineering design, performance estimation, and safety assessment, improved methods are needed for comparing computational results and experimental measurements. Traditional methods of graphically comparing computational and experimental results, though valuable, are essentially qualitative. Computable measures are needed that can quantitatively compare computational and experimental results over a range of input, or control, variables and s… more

Date: August 1, 2005

Creator: Barone, Matthew Franklin & Oberkampf, William Louis

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A Gage Block Measurement Process Using Single Wavelength Interferometry

Report describing the interferometric measurement process using a laser light source and a Kosters type gage block interferometer. Continuous evaluation and refinement of the process is aided by statistical treatment and control chart techniques. All error sources, both random and systematic, are evaluated and the process is maintained in a state of statistical control.

Date: December 1975

Creator: Beers, John S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Direct releases to the surface and associated complementary cumulative distribution functions in the 1996 performance assessment for the Waste Isolation Pilot Plant: Cuttings, cavings and spallings

The following topics related to the treatment of cuttings, cavings and spallings releases to the surface environment in the 1996 performance assessment for the Waste Isolation Pilot Plant (WIPP) are presented: (1) mathematical description of models. (2) uncertainty and sensitivity analysis results arising from subjective (i.e., epistemic) uncertainty for individual releases, (3) construction of complementary cumulative distribution functions (CCDFs) arising from stochastic (i.e., aleatory) unce… more

Date: May 22, 2000

Creator: Berglund, J. W.; Garner, J. W.; Helton, Jon Craig; Johnson, J. D.; Smith, L. N. & Anderson, R. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Uncertainty Analysis of Nondestructive Assay Measurements of Nuclear Waste

Regulatory agencies governing the disposal of nuclear waste require that the waste be appropriately characterized prior to disposition. The most important aspect of the characterization process, establishing radionuclide content, is often achieved by nondestructive assay (NDA). For NDA systems to be approved for use in these applications, measurement uncertainty must be established. Standard �propagation of errors� methods provide a good starting point for considering the uncertainty analysis o… more

Date: November 1, 1998

Creator: Blackwood, L. G. & Harker, Y. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Uncertainty Analysis of Nondestructive Assay Measurements of Nuclear Waste

Regulatory agencies governing the disposal of nuclear waste require that the waste be appropriately characterized prior to disposition. The most important aspect of the characterization process, establishing radionuclide content, is often achieved by nondestructive assay (NDA). For NDA systems to be approved for use in these applications, measurement uncertainty must be established. Standard “propagation of errors” methods provide a good starting point for considering the uncertainty analysis o… more

Date: November 1, 1998

Creator: Blackwood, Larry Gene & Harker, Yale Deon

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

LDRD final report : robust analysis of large-scale combinatorial applications.

Discrete models of large, complex systems like national infrastructures and complex logistics frameworks naturally incorporate many modeling uncertainties. Consequently, there is a clear need for optimization techniques that can robustly account for risks associated with modeling uncertainties. This report summarizes the progress of the Late-Start LDRD 'Robust Analysis of Largescale Combinatorial Applications'. This project developed new heuristics for solving robust optimization models, and de… more

Date: September 1, 2007

Creator: Carr, Robert D.; Morrison, Todd (University of Colorado, Denver, CO); Hart, William Eugene; Benavides, Nicolas L. (Santa Clara University, Santa Clara, CA); Greenberg, Harvey J. (University of Colorado, Denver, CO); Watson, Jean-Paul et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Remediation of the Faultless underground nuclear test: Moving forward in the face of model uncertainty.

The hundreds of locations where nuclear tests were conducted underground are dramatic legacies of the cold war. The vast majority of these tests are within the borders of the Nevada Test Site (NTS), but 11 underground tests were conducted elsewhere. The Faultless test, conducted in central Nevada, is the site of an ongoing environmental remediation effort that has successfully progressed through numerous technical challenges due to close cooperation between the U.S. Department of Energy (DOE) N… more

Date: October 18, 2001

Creator: Chapman, Jenny B.; Pohlmann, Karl; Pohll, Greg; Hassan, Ahmed; Sanders, Peter; Sanchez, Monica et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Customer Induced Uncertainty and Its Impact on Organizational Design

How firms facing environmental uncertainty should organize their activities remains an important and challenging question for today's managers and organizational researchers. Proponents of contingency theory have argued that organizations must adjust their activities to fit the level of environmental uncertainty to ensure long-term survival. Although much work has been done on contingency theory, it is clear that our understanding of uncertainty is far from complete. One important aspect of tod… more

Date: August 1999

Creator: Chowdhury, Sanjib Kumar

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

UNCERTAINTY EVALUATION OF AVAILABLE ENERGY AND POWER

The Idaho National Laboratory does extensive testing and evaluation of advanced technology batteries and ultracapacitors for applications in electric and hybrid vehicles. The testing is essentially acquiring time records of voltage, current and temperature from a variety of charge and discharge time profiles. From these three basic measured parameters, a complex assortment of derived parameters (resistance, power, etc.) is computed. Derived parameters are in many cases functions of multiple lay… more

Date: May 1, 2006

Creator: Christophersen, Jon P. & Morrison, John L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Battery Technology Life Verification Testing and Analysis

A critical component to the successful commercialization of batteries for automotive applications is accurate life prediction. The Technology Life Verification Test (TLVT) Manual was developed to project battery life with a high level of statistical confidence within only one or two years of accelerated aging. The validation effort that is presently underway has led to several improvements to the original methodology. For example, a newly developed reference performance test revealed a voltage … more

Date: December 1, 2007

Creator: Christophersen, Jon P.; Hunt, Gary L.; Bloom, Ira; Thomas, Ed & Battaglia, Vince

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Implementation and Validation of Uncertainty Analysis of Available Energy and Available Power

The Idaho National Laboratory does extensive testing and evaluation of state-of-the-art batteries and ultracapacitors for hybrid-electric vehicle applications as part of the FreedomCAR and Vehicle Technologies Program. Significant parameters of interest include Available Energy and Available Power. Documenting the uncertainty analysis of these derived parameters is a very complex problem. The error is an unknown combination of both linearity and offset; the analysis presented in this paper comp… more

Date: April 1, 2007

Creator: Christophersen, Jon P.; Morrison, John L.; Schubert, B. J. & Allred, Shawn

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Sensitivity technologies for large scale simulation.

Sensitivity analysis is critically important to numerous analysis algorithms, including large scale optimization, uncertainty quantification,reduced order modeling, and error estimation. Our research focused on developing tools, algorithms and standard interfaces to facilitate the implementation of sensitivity type analysis into existing code and equally important, the work was focused on ways to increase the visibility of sensitivity analysis. We attempt to accomplish the first objective throu… more

Date: January 1, 2005

Creator: Collis, Samuel Scott; Bartlett, Roscoe Ainsworth; Smith, Thomas Michael; Heinkenschloss, Matthias (Rice University, Houston, TX); Wilcox, Lucas C. (Brown University, Providence, RI); Hill, Judith C. (Carnegie Mellon University, Pittsburgh, PA) et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Measurement Assurance for Gage Blocks

Report discussing the philosophy of measurement assurance and the three levels of measurement assurance programs. The measurement assurance programs are outlined to show how control over the measurement process can be maintained and how the offset (or systematic error) from the unit of length maintained by the National Bureau of Standards ban be made negligible. This monograph is intended for those who need to know on a continuing basis the uncertainty of their gage block calibration procedure.

Date: February 1979

Creator: Croarkin, Carroll; Beers, John & Tucker, Clyde

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Introduction to the Buildings Sector Module of SEDS

SEDS is a stochastic engineering-economics model that forecasts economy-wide energy consumption in the U.S. to 2050. It is the product of multi-laboratory collaboration among the National Renewable Energy Laboratory (NREL), Pacific Northwest National Laboratory (PNNL), Argonne National Laboratory (ANL), Lawrence Berkeley National Laboratory (LBNL), and Lumina Decision Systems. Among national energy models, SEDS is unique, as it is the only model written to explicitly incorporate uncertainty in … more

Date: December 31, 2010

Creator: DeForest, Nicholas; Bonnet, Florence; Stadler, Michael & Marnay, Chris

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A preliminary study to Assess Model Uncertainties in Fluid Flows

The goal of this study is to assess the impact of various flow models for a simplified primary coolant loop of a light water nuclear reactor. The various fluid flow models are based on the Euler equations with an additional friction term, gravity term, momentum source, and energy source. The geometric model is purposefully chosen simple and consists of a one-dimensional (1D) loop system in order to focus the study on the validity of various fluid flow approximations. The 1D loop system is repre… more

Date: September 1, 2009

Creator: Delchini, Marc Oliver & Ragusa, Jean C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Incorporating uncertainty in RADTRAN 6.0 input files.

Uncertainty may be introduced into RADTRAN analyses by distributing input parameters. The MELCOR Uncertainty Engine (Gauntt and Erickson, 2004) has been adapted for use in RADTRAN to determine the parameter shape and minimum and maximum of the distribution, to sample on the distribution, and to create an appropriate RADTRAN batch file. Coupling input parameters is not possible in this initial application. It is recommended that the analyst be very familiar with RADTRAN and able to edit or creat… more

Date: February 1, 2010

Creator: Dennis, Matthew L.; Weiner, Ruth F. & Heames, Terence John (Alion Science and Technology)

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Quantifying reliability uncertainty : a proof of concept.

This paper develops Classical and Bayesian methods for quantifying the uncertainty in reliability for a system of mixed series and parallel components for which both go/no-go and variables data are available. Classical methods focus on uncertainty due to sampling error. Bayesian methods can explore both sampling error and other knowledge-based uncertainties. To date, the reliability community has focused on qualitative statements about uncertainty because there was no consensus on how to quanti… more

Date: October 1, 2009

Creator: Diegert, Kathleen V.; Dvorack, Michael A.; Ringland, James T.; Mundt, Michael Joseph; Huzurbazar, Aparna (Los Alamos National Laboratory, Los Alamos, NM); Lorio, John F. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Comparison of Pyranometers vs. PV Reference Cells for Evaluation of PV Array Performance

As the photovoltaics (PV) industry has grown, the need for accurately monitoring the solar resource of PV power plants has increased. Historically, the PV industry has relied on thermopile pyranometers for irradiance measurements, and a large body of historical irradiance data taken with pyranometers exists. However, interest in PV reference devices is increasing. In this paper, we discuss why PV reference devices are better suited for PV applications, and estimate the typical uncertainties in … more

Date: September 1, 2012

Creator: Dunn, L.; Gostein, M. & Emery, K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Understanding Risk Under Conditions of Inherent Uncertainty

The 17th International Conference on Knowledge Management was held in the historic city of Potsdam, Germany. Since the conference was among the first post-pandemic face to face conferences, the overall theme of the 17th edition of the ICKM conference rightly focused on “Knowledge, Uncertainty and Risks: From individual to global scale” at different levels of analysis and agency. This document highlighted one of the keynote speeches by Susanne Durst, a Full Professor of Entrepreneurship at Tall… more

Date: June 2022

Creator: Durst, Susanne

Item Type: Book

Partner: UNT College of Information

open access

Solution-verified reliability analysis and design of bistable MEMS using error estimation and adaptivity.

This report documents the results for an FY06 ASC Algorithms Level 2 milestone combining error estimation and adaptivity, uncertainty quantification, and probabilistic design capabilities applied to the analysis and design of bistable MEMS. Through the use of error estimation and adaptive mesh refinement, solution verification can be performed in an automated and parameter-adaptive manner. The resulting uncertainty analysis and probabilistic design studies are shown to be more accurate, efficie… more

Date: October 1, 2006

Creator: Eldred, Michael Scott; Subia, Samuel Ramirez; Neckels, David; Hopkins, Matthew Morgan; Notz, Patrick K.; Adams, Brian M. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department