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The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 145, Ed. 1 Wednesday, April 21, 1999 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 145, Ed. 1 Wednesday, April 21, 1999

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date: April 21, 1999
Creator: Allam, Heather
Object Type: Newspaper
System: The Gateway to Oklahoma History
The mean evolution and variability of the Asian summer monsoon: comparison of ECMWF and NCEP/NCAR reanalyses (open access)

The mean evolution and variability of the Asian summer monsoon: comparison of ECMWF and NCEP/NCAR reanalyses

The behavior of the Asian Summer Monsoon is compared using the European Centre for Medium Range Weather Forecasts Reanalysis (ERA) and the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis (Kalnay et al. 1996). The goals of this paper are to identify common features between the reanalyses, to assess their robustness for model validation, and especially to use reanalyses to develop their understanding of the mean evolution of the Asian Summer Monsoon and the characteristics of its interannual and intraseasonal variability (Annamalai et al. 1999).
Date: April 21, 1999
Creator: Annamalai, H.; Hodges, K.; Slingo, J. M. & Sperber, K. R.
Object Type: Article
System: The UNT Digital Library
The relationship between intraseasonal and interannual variability during the asian summer monsoon (open access)

The relationship between intraseasonal and interannual variability during the asian summer monsoon

The purpose of this paper is to investigate intraseasonal (30-70 days) and higher frequency (5-30 days) variability and its relationship to interannual variability. Various modelling studies have suggested a link between intraseasonal and interannual variability of the Asian summer monsoon. This relationship has been mainly based upon the similar spatial structures of the dominant EOF patterns of the monsoon circulation on intraseasonal and interannual time scales from simulations with simple models and atmospheric general circulation models. Here we investigate these relationships using 40 years of NCEP/NCAR Reanalysis. Motivation for this study is embodied in the suggestions of Charney and Shukla (1981) that boundary forcing (e.g., sea surface temperature) may predispose the monsoon system towards a dry or wet state, and the result of Palmer (1994), using the Lorenz (1963) model, that the probability of being in one regime of phase space or another is no longer equally probable in the presence of external forcing. To investigate the influence of the boundary forcing, the probability distribution functions (PDF�s) of the principal components are given.
Date: April 21, 1999
Creator: Annamalai, H; Slingo, J M & Sperber, K R
Object Type: Article
System: The UNT Digital Library
Demonstration Integrated Knowledge-Based System for Estimating Human Error Probabilities (open access)

Demonstration Integrated Knowledge-Based System for Estimating Human Error Probabilities

Human Reliability Analysis (HRA) is currently comprised of at least 40 different methods that are used to analyze, predict, and evaluate human performance in probabilistic terms. Systematic HRAs allow analysts to examine human-machine relationships, identify error-likely situations, and provide estimates of relative frequencies for human errors on critical tasks, highlighting the most beneficial areas for system improvements. Unfortunately, each of HRA's methods has a different philosophical approach, thereby producing estimates of human error probabilities (HEPs) that area better or worse match to the error likely situation of interest. Poor selection of methodology, or the improper application of techniques can produce invalid HEP estimates, where that erroneous estimation of potential human failure could have potentially severe consequences in terms of the estimated occurrence of injury, death, and/or property damage.
Date: April 21, 1999
Creator: Auflick, Jack L.
Object Type: Article
System: The UNT Digital Library
Results of W-87/Mk21 Deployment Separation Shock Tests (open access)

Results of W-87/Mk21 Deployment Separation Shock Tests

This report summarizes results of the W-87/Mk21 Deployment Separation Shock Tests conducted at the Survivability and Vulnerability Integration Center (SVIC) Hill Air Force Base in Ogden, Utah, from 10/5/98 to 10/8/98. Specific details regarding the test plan and procedures can be found in the Master Test Plan listed in the references. Test Objectives: (1) Evaluate the performance of a set of servo accelerometers during and post Re-entry Vehicle (RV) separation events. These ultra-sensitive accelerometers ({mu}g) needed operate during and after the separation shock events and these tests would serve as confirmation of proper functioning. These sensors were later flown on FrU-15, a development flight unit supporting the Instrumented High Fidelity Joint Test Assembly Program, as part of an experimental Inertial Measurement Unit (IMU) measure RV dynamics during RV mechanical separation and spin-up. (2) Measure separation shock response at the IMU accelerometer locations. (3) Measure separation shock response at locations on the warhead and RV common to locations used on MMIII separation tests conducted at LMMS Valley Forge for data comparison.
Date: April 21, 1999
Creator: Avalle, C. A.
Object Type: Report
System: The UNT Digital Library
Work of Adhesion Measurements of Silicone Networks Using Contract Mechanics (open access)

Work of Adhesion Measurements of Silicone Networks Using Contract Mechanics

Work of adhesion (Wa) measurements are being studied for several types of polymer/metal combinations in order to obtain a better understanding of the adhesive failure mechanisms for systems containing encapsulated and bonded components. A primary concern is whether studies of model systems can be extended to systems of technological interest. One study performed in our laboratory involved the determination of Wa between silicone (PDMS) and Al surfaces in order to establish potential adhesive failure mechanisms. Our initial work with PDMS was based on Dow Corning 170 Sylgard. PDMS hemispheres were synthesized following the procedure outlined by Chaudhury and Whitesides where the filler was stripped from the commercial silicone by centrifuging. Wa between PDMS surfaces was determined using the JKR method. Our results for the Wa of PDMS were in agreement with those reported by Chaudhury and Whitesides. However, further JKR studies using these PDMS hemispheres on flat Al surfaces were fraught with difficulty. We could not discriminate hydrogen-bonding effects between Al{sub 2}O{sub 3} and hydroxyl groups in the PDMS and other possible bonding mechanisms. It was suggested that commercial systems contain inhibitors and additives that interfere with understanding the PMDS/Al interface. Therefore, the current study uses pure PDMS networks synthesized …
Date: April 21, 1999
Creator: Benkoski, Jason; Emerson, John A.; Miller, Gregory V. & Pearson, Raymond A.
Object Type: Article
System: The UNT Digital Library
Investigation of using a Porous Media Approximation for Flow and Heat Transfer through the Nuclear Materials Storage Facility Drywell Array (open access)

Investigation of using a Porous Media Approximation for Flow and Heat Transfer through the Nuclear Materials Storage Facility Drywell Array

The Nuclear Materials Storage Facility (NMSF) is being renovated to provide a safe and secure long-term facility at Los Alamos National Laboratory to store nuclear materials. The concept for storage uses vertical tubes that are called drywells that have nuclear bearing canisters inside the tubes. The NMSF facility may use up to 370 of these tubes containing up to 10 canisters producing 15 W each. Analysts at the Laboratory wish to use CFD computer codes to predict the flow and thermal effects of air flow through the facility and the tube array. However, the complexity and large number of storage tubes precludes modeling the facility in enough detail to resolve the boundary layers around each and every tube. Therefore, certain approximations have to be made. A major approximation that has been used in this modeling effort has been to simulate the array of tubes as a porous media, The assumption-in the use of porous media is that the resistance of the drywells can be accounted for in a general way. The purpose of this study is to evaluate the suitability of the porous media approximation for modeling the tube array in the NMSF. In this study we will compare porous …
Date: April 21, 1999
Creator: Bernardin, J. D.; Gregory, W. S. & Owen, A. C.
Object Type: Article
System: The UNT Digital Library
Selection of Hydrological Model for Waterborne Release (open access)

Selection of Hydrological Model for Waterborne Release

Following a request from the States of South Carolina and Georgia, downstream radiological consequences from postulated accidental aqueous releases at the three Savannah River Site nonreactor nuclear facilities will be examined. This evaluation will aid in determining the potential impacts of liquid releases to downstream populations on the Savannah River. The purpose of this report is to evaluate the two available models and determine the appropriate model for use in following waterborne release analyses. Additionally, this report will document the accidents to be used in the future study.
Date: April 21, 1999
Creator: Blanchard, A.
Object Type: Report
System: The UNT Digital Library
Selection of Hydrological Model for Waterborne Release (open access)

Selection of Hydrological Model for Waterborne Release

This evaluation will aid in determining the potential impacts of liquid releases to downstream populations on the Savannah River. The purpose of this report is to evaluate the two available models and determine the appropriate model for use in following waterborne release analyses. Additionally, this report will document the Design Basis and Beyond Design Basis accidents to be used in the future study.
Date: April 21, 1999
Creator: Blanchard, A.
Object Type: Report
System: The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 106, No. 78, Ed. 1 Wednesday, April 21, 1999 (open access)

Perry Daily Journal (Perry, Okla.), Vol. 106, No. 78, Ed. 1 Wednesday, April 21, 1999

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date: April 21, 1999
Creator: Brown, Gloria
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, April 21, 1999 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, April 21, 1999

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: April 21, 1999
Creator: Bush, Kent
Object Type: Newspaper
System: The Gateway to Oklahoma History
Effect of Substrate Composition on the Piezoelectric Response of Reactively Sputtered AlN Thin Films (open access)

Effect of Substrate Composition on the Piezoelectric Response of Reactively Sputtered AlN Thin Films

Deposition parameters were found to have a marked effect on piezoelectric response of reactive radio frequency (RF) sputtered AlN thin films. The authors observed peizoelectric response values ranging from {minus}3.5 to +4.2 pm/V for 1 {micro}m thick AlN films deposited onto Ti/Ru electrode stacks. An investigation of the effects of deposition parameters, in particular the nature of the Ru/AlN interface, was conducted. The lag time between deposition of adjacent thin film layers appeared to have the greatest affect on the value of the piezoelectric response. This suggests that chemical reaction occurring on the Ru thin film surface is responsible for changing an important thin film property such as dipole orientation within the overlying AlN thin film.
Date: April 21, 1999
Creator: Clem, P. G.; Dimos, D. B.; Gonzales, D. M.; Ruffner, J. A. & Tuttle, B. A.
Object Type: Article
System: The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 100, No. 29, Ed. 1 Wednesday, April 21, 1999 (open access)

Altus Times (Altus, Okla.), Vol. 100, No. 29, Ed. 1 Wednesday, April 21, 1999

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: April 21, 1999
Creator: Cole, Carol
Object Type: Newspaper
System: The Gateway to Oklahoma History

Ensemble: 1999-04-21 - Concert Band

Access: Use of this item is restricted to the UNT Community
A symphonic band concert performed at the UNT College of Music Winspear Hall.
Date: April 21, 1999
Creator: Concert Band
Object Type: Sound
System: The UNT Digital Library
Hybrid Blends of Non-Traditional Safety and Reliability Analysis Tools (open access)

Hybrid Blends of Non-Traditional Safety and Reliability Analysis Tools

Traditional safety and reliability analysis methods are applicable to many standard problems, including those examples illustrated in most formal courses. However, there are many real-world situations for which non-traditional methods appear to be more appropriate, mainly because most practical problems involve substantial subjectivity about the inputs and models used. This paper surveys some of the most applicable approaches found in a recent research study. Each approach is developed individually and is illuminated by selecting example situations of apparent applicability. Then, the combinational blending of the approaches with each other and with traditional methodology is discussed.
Date: April 21, 1999
Creator: Cooper, J.A.
Object Type: Article
System: The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 77, No. 148, Ed. 1 Wednesday, April 21, 1999 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 77, No. 148, Ed. 1 Wednesday, April 21, 1999

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: April 21, 1999
Creator: Dobbs, Gary
Object Type: Newspaper
System: The Portal to Texas History
Kosovo: International Reactions to NATO Air Strikes (open access)

Kosovo: International Reactions to NATO Air Strikes

None
Date: April 21, 1999
Creator: Donfried, Karen
Object Type: Report
System: The UNT Digital Library
University Press (Beaumont, Tex.), Vol. 75, No. 43, Ed. 1 Wednesday, April 21, 1999 (open access)

University Press (Beaumont, Tex.), Vol. 75, No. 43, Ed. 1 Wednesday, April 21, 1999

Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.
Date: April 21, 1999
Creator: Dorman, Billie
Object Type: Newspaper
System: The Portal to Texas History
The Seminole Sentinel (Seminole, Tex.), Vol. 92, No. 53, Ed. 1 Wednesday, April 21, 1999 (open access)

The Seminole Sentinel (Seminole, Tex.), Vol. 92, No. 53, Ed. 1 Wednesday, April 21, 1999

Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with advertising.
Date: April 21, 1999
Creator: Dow, M. Gene & Fisher, David
Object Type: Newspaper
System: The Portal to Texas History
The Wylie News (Wylie, Tex.), Vol. 52, No. 47, Ed. 1 Wednesday, April 21, 1999 (open access)

The Wylie News (Wylie, Tex.), Vol. 52, No. 47, Ed. 1 Wednesday, April 21, 1999

Weekly newspaper from Wylie, Texas that includes local, state and national news along with advertising.
Date: April 21, 1999
Creator: Engbrock, Chad B.
Object Type: Newspaper
System: The Portal to Texas History
Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 89, No. 32, Ed. 1 Wednesday, April 21, 1999 (open access)

Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 89, No. 32, Ed. 1 Wednesday, April 21, 1999

Semiweekly newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date: April 21, 1999
Creator: Gann, Sherry
Object Type: Newspaper
System: The Gateway to Oklahoma History
SYNTHESIS OF METHYL METHACRYLATE FROM COAL-DERIVED SYNGAS (open access)

SYNTHESIS OF METHYL METHACRYLATE FROM COAL-DERIVED SYNGAS

Research Triangle Institute (RTI), Eastman Chemical Company, and Bechtel collectively are developing a novel three-step process for the synthesis of methyl methacrylate (MMA) from coal-derived syngas that consists of the steps of synthesis of a propionate, its condensation with formaldehyde to form methacrylic acid (MAA), and esterification of MAA with methanol to produce MMA. The research team has completed the research on the three-step methanol-based route to MMA. Under an extension to the original contract, we are currently evaluating a new DME-based process for MMA. The key research need for DME route is to develop catalysts for DME partial oxidation reactions and DME condensation reactions. Over the last quarter (January-March/99), in-situ formaldehyde generation and condensation with methyl propionate were tested over various catalysts and reaction conditions. The patent application is in preparation and the results are retained for future reports.
Date: April 21, 1999
Creator: Gogate, Makarand R.; Spivey, James J.; Zoeller, Joseph R.; Colberg, Richard D.; Choi, Gerald N. & Tam, Samuel S.
Object Type: Report
System: The UNT Digital Library
Liquid waste certification plan 340 waste handling facility (open access)

Liquid waste certification plan 340 waste handling facility

This document addresses the discharges from the 340 Facility to the 300 Area Process Sewer and Retention Process Sewer.
Date: April 21, 1999
Creator: HALGREN, D.L.
Object Type: Report
System: The UNT Digital Library
Server-Side JavaScript Debugging: Viewing the Contents of an Object (open access)

Server-Side JavaScript Debugging: Viewing the Contents of an Object

JavaScript allows the definition and use of large, complex objects. Unlike some other object-oriented languages, it also allows run-time modifications not only of the values of object components, but also of the very structure of the object itself. This feature is powerful and sometimes very convenient, but it can be difficult to keep track of the object's structure and values throughout program execution. What's needed is a simple way to view the current state of an object at any point during execution. There is a debug function that is included in the Netscape server-side JavaScript environment. The function outputs the value(s) of the expression given as the argument to the function in the JavaScript Application Manager's debug window [SSJS].
Date: April 21, 1999
Creator: Hampton, J. & Simons, R.
Object Type: Article
System: The UNT Digital Library