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[News Clip: P-What If]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 6, 1997, 10:00 p.m.
Duration: 1 minute 54 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Another Look at the Relationship Between Accident- and Encroachment-Based Approaches to Run-Off-the-Road Accidents Modeling

Description: The purpose of this study was to look for ways to combine the strengths of both approaches in roadside safety research. The specific objectives were (1) to present the encroachment-based approach in a more systematic and coherent way so that its limitations and strengths can be better understood from both statistical and engineering standpoints, and (2) to apply the analytical and engineering strengths of the encroachment-based thinking to the formulation of mean functions in accident-based mod… more
Date: August 1997
Creator: Miaou, Shaw-Pin
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effect of nitrite concentration on pit depth in carbon steel exposed to simulated radioactive waste

Description: The growth of pits in carbon steel exposed to dilute (0.055 M nitrate-bearing) alkaline salt solutions that simulate radioactive waste was investigated in coupon immersion tests. Most coupons were tested in the as-received condition, with the remainder having been heat treated to produce an oxide film. Nitrite, which is an established pitting inhibitor in these solutions, was present in concentrations from 0 to 0.031 M to 0.16 M; the last concentration is known to prevent pitting initiation in … more
Date: October 21, 1997
Creator: Zapp, P.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Increasing the productivity of biomass plantations of Populus species and hybrids in the Pacific Northwest. Final report, September 14, 1981--December 31, 1996

Description: This final report represents the culmination of eight years of biological research devoted to increasing the productivity of short rotation plantations of Populus trichocarpa and Populus hybrids in the Pacific Northwest. Studies described herein provide an understanding of tree growth, stand development and biomass yield at various spacings, and how patterns thereof differ by Populus clone in monoclonal and polyclonal plantings. Also included is some information about factors related to wind da… more
Date: August 1, 1997
Creator: DeBell, Dean S.; Harrington, Constance A.; Clendenen, Gary W.; Radwan, M. A. & Zasada, John C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Selection of sites for monitoring network performance (extended abstract)

Description: The authors apply the ideas from optimal design theory to the very specific area of monitoring large computer networks. The behavior of these networks is so complex and uncertain that it is quite natural to use the statistical methods of experimental design developed for situations in which the random character of phenomena is a crucial component and systems are too complicated to be described by any reasonable deterministic model. The authors want to emphasize that only the first steps have be… more
Date: August 1, 1997
Creator: Fedorov, V.; Flanagan, D. & Batsell, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Conditioning geological reservoir realizations with time-dependent data with applications to the Carpenteria Offshore Field

Description: This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project effort was directed toward preliminary geostatistical analysis of the Carpenteria Offshore Field as a precursor to the step of integrating time-dependent data into a geostatistical model of the Field.
Date: August 1, 1997
Creator: Kendall, R.P. & Campbell, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

On the statistical strength of nicalon fibers and its characterization

Description: Nicalon fibers are one of the most attractive ceramic fibers for reinforcing high temperature structural composites. Experiment show that the diameter variation (from 8 to 22 {mu}m) in a tow of commercial Nicalon fibers has an effect on statistical strength distribution of Nicalon fibers. Therefore, an appropriate characterization of the statistical distribution of fiber strength, capable of accounting for the effect of diameter variation, is required. The two-parameter single-modal Weibull dis… more
Date: February 1, 1997
Creator: Zhu, Yuntian T.; Taylor, Seth T.; Stout, Michael G.; Butt, Darryl P.; Blumenthal, William R. & Lowe, Terry C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Statistical validation of system models

Description: It is common practice in system analysis to develop mathematical models for system behavior. Frequently, the actual system being modeled is also available for testing and observation, and sometimes the test data are used to help identify the parameters of the mathematical model. However, no general-purpose technique exists for formally, statistically judging the quality of a model. This paper suggests a formal statistical procedure for the validation of mathematical models of systems when data … more
Date: January 1, 1997
Creator: Barney, P.; Ferregut, C.; Perez, L. E.; Hunter, N. F. & Paez, T. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A comparison of attribute sampling plans

Description: This report describes, compares, and provides sample size selection criteria for the most common sampling plans for attribute data (i.e., data that is qualitative in nature such as Pass-Fail, Yes-No, Defect-Nondefect data). This report is being issued as a guide in prudently choosing the correct sampling plan to meet statistical plan objectives. The report discusses three types of sampling plans: AQL (Acceptable Quality Level expressed as a percent), RQL (Rejectable Quality Level as a percent),… more
Date: May 1, 1997
Creator: Lanning, B. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Traffic characterization and modeling of wavelet-based VBR encoded video

Description: Wavelet-based video codecs provide a hierarchical structure for the encoded data, which can cater to a wide variety of applications such as multimedia systems. The characteristics of such an encoder and its output, however, have not been well examined. In this paper, the authors investigate the output characteristics of a wavelet-based video codec and develop a composite model to capture the traffic behavior of its output video data. Wavelet decomposition transforms the input video in a hierarc… more
Date: July 1, 1997
Creator: Kuo, Yu; Jabbari, B. & Zafar, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterizing reliability in a product/process design-assurance program

Description: Over the years many advancing techniques in the area of reliability engineering have surfaced in the military sphere of influence, and one of these techniques is Reliability Growth Testing (RGT). Private industry has reviewed RGT as part of the solution to their reliability concerns, but many practical considerations have slowed its implementation. It`s objective is to demonstrate the reliability requirement of a new product with a specified confidence. This paper speaks directly to that object… more
Date: October 1, 1997
Creator: Kerscher, W.J. III; Booker, J.M.; Bement, T.R. & Meyer, M.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Integration of geologic interpretation into geostatistical simulation

Description: Embedded Markov chain analysis has been used to quantify geologic interpretation of juxtapositional tendencies of geologic facies. Such interpretations can also be translated into continuous-lag Markov chain models of spatial variability for use in geostatistical simulation of facies architecture.
Date: June 1, 1997
Creator: Carle, S. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A computer toolbox for damage identification based on changes in vibration characteristics

Description: This paper introduces a new toolbox of graphical-interface software algorithms for the numerical simulation of vibration tests, analysis of modal data, finite element model correlation, and the comparison of both linear and nonlinear damage identification techniques. This toolbox is unique because it contains several different vibration-based damage identification algorithms, categorized as those which use only measured response and sensor location information ({open_quotes}non-model-based{clos… more
Date: September 1, 1997
Creator: Doebling, S.W.; Farrar, C.R. & Cornwell, P.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laboratory directed research development annual report. Fiscal year 1996

Description: This document comprises Pacific Northwest National Laboratory`s report for Fiscal Year 1996 on research and development programs. The document contains 161 project summaries in 16 areas of research and development. The 16 areas of research and development reported on are: atmospheric sciences, biotechnology, chemical instrumentation and analysis, computer and information science, ecological science, electronics and sensors, health protection and dosimetry, hydrological and geologic sciences, ma… more
Date: May 1, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Meeting report: Workshop on reduction and predictability of natural disasters

Description: Natural hazards such as earthquakes and severe floods are a continual menace to large segments of the population worldwide. Recently the United Nations has focused attention on this global problem by declaring the 90`s the Decade of Natural Hazard Reduction. In addition to the obvious threat to human life natural hazards can cause severe economic hardship locally and, in an ever more complex and interactive world economy, dislocations that are felt in areas far beyond the region of a specific e… more
Date: April 21, 1997
Creator: Rundle, J.; Klein, W. & Turcotte, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Model-based image reconstruction from time-resolved diffusion data

Description: This paper addresses the issue of reconstructing the unknown field of absorption and scattering coefficients from time-resolved measurements of diffused light in a computationally efficient manner. The intended application is optical tomography, which has generated considerable interest in recent times. The inverse problem is posed in the Bayesian framework. The maximum {ital a posteriori} (MAP) estimate is used to compute the reconstruction. We use an edge- preserving generalized Gaussian Mark… more
Date: February 1, 1997
Creator: Saquib, S. S.; Hanson, K. M. & Cunningham, G. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A further study of the impact of bias on accountability

Description: When measurements are obtained for the purpose of material accountability, any deviation of averages from true value is one of great concern. The key term here is true value. Any deviation of averages from their true value will result in inventory discrepancies. It will not matter that the bias is of no statistical significance. Even small biases will over a period of time result in large inventory discrepancies. The terms `target value`, `accepted value`, and `certified value` are all very use… more
Date: March 1, 1997
Creator: Harvey, T. R. & McGuire, S. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Houston Pre-Freshman Enrichment Program (Houston PREP). Final report, June 9, 1997--July 25, 1997

Description: The 1997 Houston Pre-Freshman Enrichment Program (PREP) was conducted at the campus of the University of Houston-Downtown from June 9 to July 25, 1997. Program participants were recruited from the Greater Houston Area. All participants were identified as high-achieving students with an interest in learning about the engineering and science professions. The goal of the program was to better prepare our pre-college youth prior to entering college as mathematics, science and engineering majors. Th… more
Date: October 1, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Statistical signal processing and artificial intelligence applications in the nondestructive assay of U/Pu bearing materials

Description: Over the years a number of techniques have been developed to determine the quantity and distribution of radiative isotopes contained in given assay samples through the measurement and analysis of penetrating characteristic radiations. An active technique of particular utility when assaying samples containing very small quantities of fissionable material or when high gamma ray backgrounds are encountered is the delayed neutron nondestructive assay (DN-NDA) technique. Typically, analysis of the d… more
Date: October 1, 1997
Creator: Aumeier, S.E. & Forsmann, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Review of Statistical Analyses Resulting from Performance of HLDWD- DWPF-005

Description: The Engineering Department at the Defense Waste Processing Facility (DWPF) has reviewed two reports from the Statistical Consulting Section (SCS) involving the statistical analysis of test results for analysis of small sample inserts (references 1{ampersand}2). The test results cover two proposed analytical methods, a room temperature hydrofluoric acid preparation (Cold Chem) and a sodium peroxide/sodium hydroxide fusion modified for insert samples (Modified Fusion). The reports support impleme… more
Date: September 29, 1997
Creator: Beck, R.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Prediction of heat capacities of solid inorganic salts from group contributions

Description: A group contribution technique is proposed to predict the coefficients in the heat capacity correlation, C{sub p} = a + bT + c/T{sup 2} + dT{sup 2}, for solid inorganic salts. The results from this work are compared with fits to experimental data from the literature. It is shown to give good predictions for both simple and complex solid inorganic salts. Literature heat capacities for a large number (664) of solid inorganic salts covering a broad range of cations (129), anions (17) and ligands (… more
Date: January 1, 1997
Creator: Mostafa, A. T. M. G.; Eakman, J. M. & Yarbro, S. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Making business decisions using trend information

Description: Performance Measures, and the trend information that results from their analyses, can help managers in their decision making process. The business decisions that are to be discussed are: Assignment of limited Resources, Funding, Budget; Contractor Rewards/Incentives; Where to focus Process Improvement, Reengineering efforts; When to ask ``What Happened?!!``; Determine if a previous decision was effectively implemented. Trending can provide an input for rational Business Decisions. Key Element i… more
Date: November 24, 1997
Creator: Prevette, S. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Web based parallel/distributed medical data mining using software agents

Description: This paper describes an experimental parallel/distributed data mining system PADMA (PArallel Data Mining Agents) that uses software agents for local data accessing and analysis and a web based interface for interactive data visualization. It also presents the results of applying PADMA for detecting patterns in unstructured texts of postmortem reports and laboratory test data for Hepatitis C patients.
Date: December 31, 1997
Creator: Kargupta, H.; Stafford, B. & Hamzaoglu, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Information content of low-dose radiographs, Part 1

Description: Two measures (not independent) of radiographic image quality are contrast and spatial frequency response. At normal radiographic exposure levels, noise is not a significant factor in evaluating these parameters. However, when the photon fluence on the detector is less than 100 photons/pixel, the statistical noise in the image significantly degrades the image contrast. This paper presents a method of characterizing the image quality that utilizes both contrast and noise by calculating the net in… more
Date: June 1, 1997
Creator: Morris, R.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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