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in subjects: "Parametric Analysis"

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An Exploration of the Titrating-Delay Match-to-Sample Procedure with Pigeons

The delayed matching‐to‐sample (DMTS) procedure involves the insertion of a delay between the offset of a sample stimulus and the onset of an array of comparison stimuli; one of which is designated as the “correct” match for the sample on each trial. The procedure has served as the base preparation in which the effects of environmental variables on short‐term remembering and is, in many ways, responsible for a refined understanding of the phenomenon. Despite its utility, however, there are a fe… more

Date: December 2011

Creator: Friedel, Jonathan E.

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

A Monte Carlo Study of the Robustness and Power of Analysis of Covariance Using Rank Transformation to Violation of Normality with Restricted Score Ranges for Selected Group Sizes

The study seeks to determine the robustness and power of parametric analysis of covariance and analysis of covariance using rank transformation to violation of the assumption of normality. The study employs a Monte Carlo simulation procedure with varying conditions of population distribution, group size, equality of group size, scale length, regression slope, and Y-intercept. The procedure was performed on raw data and ranked data with untied ranks and tied ranks.

Date: December 1984

Creator: Wongla, Ruangdet

Item Type: Thesis or Dissertation

Partner: UNT Libraries

open access

Transuranic separation using organophophorus extractants adsorbed onto superparamagnetic carriers.

Polymeric coated ferromagnetic carriers with an absorbed layer of octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) diluted by tributyl phosphate (TBP) are being evaluated for application in the separation and the recovery of low concentrations of americium, plutonium, and uranium from nuclear waste solutions. Due to their chemical nature, these extractants selectively complex americium and plutonium contaminants onto the particles and the complexed particles can be recovered fr… more

Date: October 7, 1998

Creator: Nunez, L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Vibratory response modeling and verification of a high precision optical positioning system.

A generic vibratory-response modeling program has been developed as a tool for designing high-precision optical positioning systems. Based on multibody dynamics theory, the system is modeled as rigid-body structures connected by linear elastic elements, such as complex actuators and bearings. The full dynamic properties of each element are determined experimentally or theoretically, then integrated into the program as inertial and stiffness matrices. Utilizing this program, the theoretical and … more

Date: June 18, 1999

Creator: Barraza, J.; Kuzay, T.; Royston, T. J. & Shu, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Mechanism and kinetics of H{sub 2}S-CO{sub 2} mixture dissociation in plasma of a microwave-discharge

Several experimental and theoretical investigations of plasma-chemical H{sub 2}S dissociation have addressed the effects of different gas compositions and various types of discharges (such as microwave, radio-frequency, arc, and glidarc discharges). There are two primary reasons for these investigations: (1) the plasma-chemical process recovers both hydrogen (a valuable chemical reagent) and sulfur from H{sub 2}S (as in the conventional Claus process), and (2) plasmas can be used for selectivel… more

Date: August 1, 1995

Creator: Potapkin, B. V.; Strelkova, M. I. & Fridman, A. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Investigation of combined SO{sub 2}/NO{sub x} removal by ceria sorbents. Quarterly technical progress report, October--December, 1994

Simultaneous removal of SO{sub 2} and NO{sub x} using a regenerable solid sorbent will constitute an important improvement over the use of separate processes for the removal of these two pollutants from stack gases and possibly eliminate several shortcomings of the individual SO{sub 2} and NO{sub x} removal operations. Recent studies at PETC considered cerium oxide as an alternate sorbent to CuO. The present study aims to determine the effects of ammonia on the sulfation of the sorbent and to o… more

Date: January 1, 1995

Creator: Akyurtlu, A. & Akyurtlu, J.F.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

An SDE study of twin-wire electric arc sprayed nickel-aluminum coatings

An analytical and experimental study of the twin-wire electric arc spraying of nickel-aluminum coatings has been performed to demonstrate the suitability of the wire system as a bond coat material for ceramic overcoats in thermal barrier applications, and for spraying a single coat for part refurbishment. Experiments were conducted using a Box-type full-factorial design parametric study. Operating parameters were varied around the typical process parameters (i.e., current, primary and secondary… more

Date: November 1, 1995

Creator: Varacalle, D. J. Jr.; Wilson, G. C.; Lundberg, L. B.; Hale, D. L.; Zanchuck, V.; Kratochvil, W. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Heat pipe effect in porous medium

In this thesis a parametric study of the thermal and hydrologic characteristics of the fractured porous tuffs at Yucca Mountain, Nevada was conducted. The effects of different fracture and matrix properties including permeability, thermal conductivity, specific heat, porosity, and tortuosity on heat pipe performance in the vicinity of the waste package were observed. Computer simulations were carried out using TOUGH code on a Cray YMP-2 supercomputer. None of the fracture parameters affected th… more

Date: December 1, 1992

Creator: Joseph, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Kinetic Theory and Boundary Conditions for Flows of Highly Inelastic Spheres. Quarterly Progress Report, July 1, 1994--September 30, 1994

In the last quarter, we focused on steady, fully developed, gravity-driven flows of identical, smooth spheres down bumpy inclines, with flow depths greater than one particle diameter, solid fraction profiles everywhere less than .65, and dimensionless granular temperature T(y={beta}) at the top between 0 and 10. For prescribed boundary bumpiness (r=l and {delta}=.414), restitution coefficients of the boundary (e{sub w}=.5) and the flow particles (e=.5), and angles of inclination ({phi}0=25.5{de… more

Date: December 31, 1994

Creator: Richman, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Chemical destruction of HMX-based explosives with ammonium hydroxide

A series of experiments at Los Alamos National Laboratory explored the efficacy of ammonium hydroxide solutions in converting HMX (cyclotetramethylene-tetranitramine, or Octogen) and HMX-based explosives to nonenergetic, nonhazardous materials. When 80 g of explosive was converted in a reactor operating at 85 psig pressure at 140 C, the principal gaseous products were nitrous oxide (46% to 51%), nitrogen (22% to 32%), and ammonia (17% to 28%). Formate and hexamethylene-tetramine (hexamine) acco… more

Date: September 1, 1995

Creator: Skidmore, C.; Dell`Orco, P.; Flesner, R.; Kramer, J. & Spontarelli, T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Methods development for measuring and classifying flammability/combustibility of refrigerants. Final report

Because of concerns for the effect that chlorofluorocarbon (CFC) fluids currently in use as refrigerants have on the environment, the refrigeration industry is considering the use of natural refrigerants, many of which are potentially flammable. In some cases, these flammable fluids may result in the least environmental damage when considering ozone depletion, global warming, efficiency, and photochemical reactivity. Many potentially flammable fluids have been proven to be effective when used e… more

Date: December 1, 1994

Creator: Heinonen, E.W.; Tapscott, R.E. & Crawford, F.R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Aerogel commercialization: Technology, markets and costs

Commercialization of aerogels has been slow due to several factors including cost and manufacturability issues. The technology itself is well enough developed as a result of work over the past decade by an international-community of researchers. Several extensive substantial markets appear to exist for aerogels as thermal and sound insulators, if production costs can keep prices in line with competing established materials. The authors discuss here the elements which they have identified as key… more

Date: October 7, 1994

Creator: Carlson, G.; Lewis, D.; McKinley, K.; Richardson, J. & Tillotson, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fault tolerance of the NIF power conditioning system

The tolerance of the circuit topology proposed for the National Ignition Facility (NIF) power conditioning system to specific fault conditions is investigated. A new pulsed power circuit is proposed for the NIF which is simpler and less expensive than previous ICF systems. The inherent fault modes of the new circuit are different from the conventional approach, and must be understood to ensure adequate NIF system reliability. A test-bed which simulates the NIF capacitor module design was constr… more

Date: July 7, 1995

Creator: Larson, D.W.; Anderson, R. & Boyes, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Effect of cavity design on optical parametric oscillator performance

The effect of resonator cavity design on parametric oscillator performance is investigated theoretically. Certain unstable resonators produce superior energy conversion and beam quality than traditional resonators.

Date: October 3, 1995

Creator: Neuman, W. A. & Velsko, S. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A comparative application of the Repository Integration Program (RIP) to Total System Performance Assessment, 1991

During Fiscal Year (FY) 1991 and FY 1992, Sandia National Laboratory and Battelle Pacific Northwest Laboratory were assigned the responsibility to generate initial Total System Performance Assessments (TSPAs) of the Yucca Mountain site. The analyses performed by these organizations (called TSPA-1991) are reported in Barnard et al(1992) and Eslinger et al. (1993). During this same time period, Golder Associates Inc. was assigned the task of generating a model capable of analyzing the total syste… more

Date: July 16, 1993

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Estimation of linear functionals in emission tomography

In emission tomography, the spatial distribution of a radioactive tracer is estimated from a finite sample of externally-detected photons. We present an algorithm-independent theory of statistical accuracy attainable in emission tomography that makes minimal assumptions about the underlying image. Let f denote the tracer density as a function of position (i.e., f is the image being estimated). We consider the problem of estimating the linear functional {Phi}(f) {triple_bond} {integral}{phi}(x)f… more

Date: August 1, 1995

Creator: Kuruc, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Initial results for electrochemical dissolution of spent EBR-II fuel.

Initial results are reported for the anode behavior of spent metallic nuclear fuel in an electrorefining process. The anode behavior has been characterized in terms of the initial spent fuel composition and the final composition of the residual cladding hulls. A variety of results have been obtained depending on the experimental conditions. Some of the process variables considered are average and maximum cell voltage, average and maximum anode voltage, amount of electrical charge passed (coulom… more

Date: May 4, 1998

Creator: Li, S. X.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The transmission interface constraint problem. Revision

Electric power transmission systems exhibit a number of complex constraints on their operation and usage. When a network is subject to a constraint that limits the amount of power that can be moved from one region to another, there is said to be an interface limit. The power systems literature gives no general treatment of the engineering-economics of this ubiquitous phenomenon. Particular aspects of interface limits are typically discussed in sophisticated technical detail, but the general eng… more

Date: October 1, 1994

Creator: Baldick, R. & Kahn, E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Parameterization of hysteresis effects in accumulator quadrupole magnets

The hysteresis curves of two Accumulator sample magnets have been measured, one large quadrupole and one small quadrupole. Based upon these measurements, a parameterization of hysteresis effects is deduced and generalized to other magnets. The goal is to incorporate the best knowledge of the magnets we have into the Accumulator model, on which lattice measurements are based and which is used to calculate an accurate first guess at the E-835 deceleration tables. Since a well-defined sequence of … more

Date: November 3, 1999

Creator: Stancari, Giulio

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

ANL technical support program for DOE Environmental Restoration and Waste Management. Annual report, October 1991--September 1992

A program was established for DOE Environmental Restoration and Waste Management (EM) to evaluate factors that are anticipated to affect waste glass reaction during repository disposal, especially in an unsaturated environment typical of what may be expected for the proposed Yucca Mountain repository site. This report covers progress in FY 1992 on the following tasks: 1. A compendium of the characteristics of high-level nuclear waste borosilicate glass has been written. 2. A critical review of … more

Date: May 1, 1993

Creator: Bates, J. K.; Bradley, C. R.; Buck, E. C.; Cunnane, J. C.; Dietz, N. L.; Ebert, W. L. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Analytical and experimental investigation of the dispersion process during rapid transients for the aluminum-based nuclear fuel plates

A thermally induced fuel-plate dispersion model was developed to analyze for dispersive potential and determine the onset of fuel plate dispersion for aluminum-based research and test reactor fuels. The effect of rapid energy deposition in a fuel plate was simulated. Several data types for aluminum-based fuels tested in the Nuclear Safety Research Reactor (NSRR) facility in Japan and in the Transient Reactor Test (TREAT) facility in Idaho, US, were reviewed. Analyses of experiments show that th… more

Date: June 1, 1995

Creator: Georgevich, V.; Taleyarkhan, R. P.; Kim, S. H.; Fuketa, T.; Soyama, K. & Ishijima, K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The Optimization of a Shaped-Charge Design Using Parallel Computers

Current supercomputers use large parallel arrays of tightly coupled processors to achieve levels of performance far surpassing conventional vector supercomputers. Shock-wave physics codes have been developed for these new supercomputers at Sandia National Laboratories and elsewhere. These parallel codes run fast enough on many simulations to consider using them to study the effects of varying design parameters on the performance of models of conventional munitions and other complex systems. Suc… more

Date: November 1, 1999

Creator: Gardner, David R. & Vaughan, Courtenay T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Desktop modeling as a management tool for budgeting, forecasting, and reporting in an analytical laboratory

Managers are often required to quickly and accurately estimate resource needs. At times, additional work can be absorbed without additional resources. At other times, threshold resource boundaries are exceeded requiring an additional quantum of a specific resource. Cost savings` estimates, resulting from a reduction in efforts, are also increasingly becoming a requirement of today`s managers. The modeling effort described in this paper was designed to estimate instrumentation and manpower resou… more

Date: July 1, 1995

Creator: Hodge, C.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Parameter Analysis for a High-Gain Harmonic Generation FEL Using a Recently Developed 3D Polychromatic Code.

One possible design for a fourth-generation light source is the high-gain harmonic generation (HGHG) free-electron laser (FEL). Here, a coherent seed with a wavelength at a subharmonic of the desired output radiation interacts with the electron beam in an energy-modulating section. This energy modulation is then converted into spatial bunching while traversing a dispersive section (a three-dipole chicane). The final step is passage through a radiative section, an undulator tuned to the desired … more

Date: September 10, 1999

Creator: Biedron, S. G.; Freund, H. P. & Yu, L. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department