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Piston-Liner Crevice Geometry Effect on HCCI Combustion by Multi-Zone Analysis

Description: A multi-zone model has been developed that accurately predicts HCCI combustion and emissions. The multizone methodology is based on the observation that turbulence does not play a direct role on HCCI combustion. Instead, chemical kinetics dominates the process, with hotter zones reacting first, and then colder zones reacting in rapid succession. Here, the multi-zone model has been applied to analyze the effect of piston crevice geometry on HCCI combustion and emissions. Three different pistons … more
Date: September 4, 2002
Creator: Aceves, S. M.; Flowers, D. L.; Espinosa-Loza, F.; Martinez-Frias, J.; Dibble, R. W.; Christensen, M. et al.
Partner: UNT Libraries Government Documents Department
open access

Prayer and Religion in the Public Schools: What Is, and Is Not, Permitted

Description: Few areas of constitutional law have proven to be as controversial and as subject to misinterpretation as that concerning the constitutionality of government-sponsored religious activities in public schools. In the last three decades the Supreme Court in five decisions and the State arid lower Federal courts in dozens of related decisions have attempted to articulate the 1 / meaning of the religion clauses of the First ~mendment- for a variety of such activities, including State-sponsored praye… more
Date: September 4, 1980
Creator: Ackerman, David M.
Partner: UNT Libraries Government Documents Department
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Sweeping of Fission Gases from Solutions of U and Plutonium

Description: Technical report describing two experiments performed to compare the amounts of fission gases swept out of UNH solution with those amounts swept out of PU solution under idential condiditons. The charge wire technique was used. The essential date and the results are given in tables in the report.
Date: September 4, 1945
Creator: Adams, R. M. & Finkelstein, H.
Partner: UNT Libraries Government Documents Department
open access

RF Gas Plasma Source Development for Heavy Ion Fusion

Description: Presently the Heavy Ion Fusion Virtual National Laboratory is researching ion sources and injector concepts to understand how to optimize beam brightness over a range of currents (50-2000 mA argon equivalent). One concept initially accelerates millimeter size, milliamp beamlets to 1 MeV before merging them into centimeter size, ampere beams. Computer simulations have shown the final brightness of the merged beams is dominated by the emittance growth of the merging process, as long as the beamle… more
Date: September 4, 2001
Creator: Ahle, L.; Hall, R. P.; Molvik, A. W.; Kwan, J. W. & Leung, K. N.
Partner: UNT Libraries Government Documents Department

An Evaluation of the Correlation Between Shale Gas Development and Ozone Pollution within the Barnett Shale Region

Description: Presentation for the 2014 Fracturing Impacts and Technologies Conference. This presentation discusses an evaluation of the correlation between shale gas development and ozone pollution within the Barnett Shale region.
Date: September 4, 2014
Creator: Ahmadi, Mahdi & John, Kuruvilla
Partner: UNT College of Arts and Sciences
open access

A Novel Neutron Imaging Calibration System Using a Neutron Generating Accelerator Tube

Description: Neutron Imaging is a key diagnostic for use in inertial confinement fusion (ICF) experiments, and has been fielded on experiments at Omega and Z. It will also be a key diagnostics at the National Ignition Facility (NIF) located at Lawrence Livermore National Laboratory (LLNL) and eventually at the Laser Megajoule in France. Most systems are based on a neutron pinhole array placed at the target chamber while it is imaged by a scintillating fiber block. The light output of this scintillator is co… more
Date: September 4, 2009
Creator: Ali, Z., Davis, B., Tinsley, J. R., Miller, E. K.
Partner: UNT Libraries Government Documents Department
open access

Performance Characteristics at Mach Numbers to 2.0 of Various Types of Side Inlets Mounted on Fuselage of Proposed Supersonic Airplane 2: Inlets Utilizing Half of a Conical Spike

Description: Report presenting an investigation to determine the performance of twin-scoop side inlets mounted on the fuselage of a proposed supersonic aircraft. The inlets had half of a conical spike as the compression surface and a ram-type boundary-layer-removal system. Results regarding the first inlet and redesigned inlet are provided.
Date: September 4, 1952
Creator: Allen, J. L. & Simon, P. C.
Partner: UNT Libraries Government Documents Department
open access

VTI: VME/CIPRICO Interface routines

Description: This document details the VME/CIPRICO Interface routines (VII). These routines where designed to allow programs written in PILS running on a MVME 101 under Valet-plus to control a CIPRICO tape controller. The routines fall into two general types. The low level routines, such as vti-make-pb, create the data structures used by the CIPRICO as well as manipulate the CIPRICO's control registers. The high level routines, such as vti-rewind, use the lower level routines to carry out complete functions… more
Date: September 4, 1987
Creator: Alleva, D.
Partner: UNT Libraries Government Documents Department
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EM field and instrumentation diagnostics in support of the LFT&E HPM methodology testing

Description: The Naval Air Warfare Center, China Lake, under the direction of the DOD LFT&E Office performed a series of HPM tests for the purpose of exercising the HPM methodology for LFT&E applications. An AH-1S Cobra helicopter was used as the canonical test bed. The Air Force Research Lab (formally Phillips Lab) provided the wide-band source and the Army Research Lab provided the narrow-band used in the tests. LLNL provided the EM diagnostics used at the site for both test series. Our mission was to mea… more
Date: September 4, 1997
Creator: Anderson, R. A. & Nelson, S. D.
Partner: UNT Libraries Government Documents Department
open access

U.S.-EU Cooperation Against Terrorism

Description: This report examines the evolution of counterterrorism cooperation between the United States and the European Union (EU), particularly since the September 11, 2001 terrorist attacks. It includes a discussion of U.S.-EU cooperation progress and ongoing challenges, as well as perspectives and issues for Congress.
Date: September 4, 2013
Creator: Archick, Kristin
Partner: UNT Libraries Government Documents Department
open access

Europe's Migration and Refugee Crisis

Description: This report discusses the migration and refugee crisis in Europe, as people flee conflict and poverty in neighboring regions. Many are from the Middle East and Africa; others come from Ukraine, as well as Kosovo and elsewhere in the Western Balkans. Experts have characterized the influxes as mixed migration, defined as flows of different groups of people--such as economic migrants, refugees, asylum-seekers, stateless persons, trafficked persons, and unaccompanied children--who travel the same r… more
Date: September 4, 2015
Creator: Archick, Kristin & Margesson, Rhoda
Partner: UNT Libraries Government Documents Department
open access

Development of Ribbed Jacket Tubing for PTRT

Description: One of the UO2 fuel element designs proposed for use in the PTRT is the nested tubular concepts. This configuration compromises a central fuel todo surrounded by two concentric tubes of fuel (see sketch, appenx I.) . These UO2 shapes are to be jacketed in the Zircaloy and must be separated from each other and the procuresses tyvm vt annular spaces for the passage of coolant. The annuli are established and and maintained by the longitudinal ribs on the outer surface of all three jacketed fuel el… more
Date: September 4, 1959
Creator: Aungst, R. C.
Partner: UNT Libraries Government Documents Department
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Verification and validation of the decision analysis model for assessment of tank waste remediation system waste treatment strategies

Description: This document is the verification and validation final report for the Decision Analysis Model for Assessment of Tank Waste Remediation System Waste Treatment Strategies. This model is also known as the INSIGHT Model.
Date: September 4, 1996
Creator: Awadalla, N.G. & Eaton, S.C.F.
Partner: UNT Libraries Government Documents Department
open access

Longitudinal Stability and Control of High-Speed Airplanes With Particular Reference to Dive Recovery

Description: "An analysis of the effects of compressibility on the longitudinal stability, control, and trim of airplanes flying at high subsonic speeds and a discussion of the causes of and the means for lessening or preventing the diving tendency are presented. Wind-tunnel results for Mach numbers up to 0.90 are included for purposes of illustration and cover several investigations of longitudinal stability and control, airfoil characteristics, dive-recovery aids, and elevator characteristics. Methods are… more
Date: September 4, 1947
Creator: Axelson, John A.
Partner: UNT Libraries Government Documents Department
open access

Advances in fabrication of Ag-clad Bi-2223 superconductors.

Description: Powder-in-tube (PIT) processing was used to fabricate multifilamentary Ag-clad Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y} (Bi-2223) superconductors for various electric power applications. Enhancements in the transport current properties of long lengths of multifilament tapes were achieved by increasing the packing density of the precursor powder, improving the mechanical deformation, and adjusting the cooling rate. The dependence of the critical current density on magnetic field and temperat… more
Date: September 4, 1998
Creator: Balachandran, U.
Partner: UNT Libraries Government Documents Department
open access

Validation of a Non-Targeted LC-MS Approach for Identifying Ancient Proteins: Method Development on Bone to Improve Artifact Residue Analysis

Description: This article discusses validation of the potential of an extraction and characterization approach via application to ancient bone proteins, as part of a larger method-development project for innovation and improvement of liquid chromatography - mass spectrometry analysis of protein residues from cooking pottery.
Date: September 4, 2015
Creator: Barker, Andrew; Dombrosky, Jonathan; Chaput, Dale; Venables, Barney J.; Wolverton, Steven J. & Stevens, Stanley M.
Partner: UNT College of Arts and Sciences
open access

Development of a Robust Model-Based Water Level Controller for U-Tube Steam Generator

Description: Poor control of steam generator water level of a nuclear power plant may lead to frequent nuclear reactor shutdowns. These shutdowns are more common at low power where the plant exhibits strong non-minimum phase characteristics and flow measurements at low power are unreliable in many instances. There is need to investigate this problem and systematically design a controller for water level regulation. This work is concerned with the study and the design of a suitable controller for a U-Tube St… more
Date: September 4, 2001
Creator: Basher, A. M. H.
Partner: UNT Libraries Government Documents Department
open access

Macroscopic Properties of a One-Dimensional Plasma Confined by a Magnetic Field

Description: Abstract: "The quantities of interest in a confined plasma include the electric and magnetic fields, current density, diffusion velocity, temperature, pressure, and particle density. Equations governing the distribution of these seven variables are given in this report and special cases of a one-dimensional steady-state plasma are examined in detail. The solutions are given in graphical form."
Date: September 4, 1956
Creator: Batten, Hugh W. & Woods, Cornelius H.
Partner: UNT Libraries Government Documents Department
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