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INTRINSIC RESIDUAL STRESSES IN METAL FILMS SYNTHESIZED BY ENERGETIC PARTICLE DEPOSITION
None
Date:
September 15, 2000
Creator:
A. MISRA, M. NASTASI
Object Type:
Article
System:
The UNT Digital Library
Study of electron-positron interactions
For the past seven years, this group has been interested in the study of tests of the Standard Model of Electroweak interactions. The program has centered about the AMY experiment which examines the nature of the final state products in electron-positron collisions in the center of mass energy range near 60 GeV. Results of these measurements have shown a remarkable consistency with the predictions of the minimal model of 3 quark and lepton generations and single charged and neutral intermediate bosons. No new particles or excited states have been observed nor has any evidence for departures in cross sections or angular asymmetries from expectations been observed. These conclusions have been even more firmly established by the higher energy results from the LEP and SLC colliders at center of mass energies of about 90 GeV. Our focus is shifting to the neutrino as a probe to electroweak interactions. The relative merit of attempting to observe neutrinos from point sources versus observing neutrinos generally is not easy to predict. The improved ability to interpret is offset by the probably episodic nature of the emission and irreproducibility of the results. In this phase of development, it is best to be sensitive to both …
Date:
September 15, 1990
Creator:
Abashian, A.; Gotow, K. & Philonen, L.
Object Type:
Report
System:
The UNT Digital Library
[RE: State-Wide Impact of the Regional Institutes]
A memo from Julie Abel, program associate at the Getty Center for Education in the Arts, to the Regional Institute Directors. The memo is in regards to updating the Center's survey they had asked the Directors to complete in the Summer of 1991 for the last year's Advisory Committee Notebook. In the memo, Abel has attached a chart showing the state-wide impact of the Regional Institutes that was complied form the information. Abel requests updated figures from 1992 by September 24, 1992.
Date:
September 15, 1992
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
The Migration and Entrapment of DNAPLs in Physically and Chemically Heterogeneous Porous Media - Final Report - 09/15/1996 - 09/15/2000
Hazardous dense nonaqueous phase liquids (DNAPLs), such as chlorinated solvents, are slightly water soluble and pose a serious threat to soil and groundwater supplies in many portions of the United States. The migration and entrapment of DNAPLs in the subsurface environment is typically believed to be controlled by physical heterogeneities; i.e, layers and lenses of contrasting soil texture. The rationale for this assumption is that capillarity, as determined by the soil texture, is the dominant transport mechanism. Capillarity also depends on interfacial tension and medium wettability. Interfacial tension and medium wettability may be spatially and temporally dependent due to variations in aqueous phase chemistry, contaminant aging, and/or variations in mineralogy and organic matter distributions. Such chemical heterogeneities have largely been ignored to date, even though they are known to have dramatic effects on the hydraulic property relations. Numerical multiphase flow and transport models typically assume that solids are water-wet and that interfacial tension is constant. The primary objective of this research is to investigate the influence of coupled physical and chemical heterogeneities on the migration and entrapment of DNAPLs. This objective will be accomplished through a combination of laboratory and numerical experiments. Laboratory experiments will be conducted to examine: (i) …
Date:
September 15, 2000
Creator:
Abriola, L. M. & Demond, A. H.
Object Type:
Report
System:
The UNT Digital Library
A hybrid vehicle evaluation code and its application to vehicle design. Revision 1
This paper describes a hybrid vehicle simulation model which can be applied to many of the vehicles currently being considered for low pollution and high fuel economy. The code operates in batch mode with all the vehicle information stored in data files. The code calculates fuel economy for three driving schedules, time for 0--96 km/h at maximum acceleration, hill climbing performance, power train dimensions, and pollution generation rates. This paper also documents the application of the code to a hybrid vehicle that utilizes a hydrogen internal combustion engine. The simulation model is used for parametric studies of the vehicle. The results show the fuel economy of the vehicle as a function of vehicle mass, aerodynamic drag, engine efficiency, accessory load, and flywheel efficiency. The code also calculates the minimum flywheel energy and power to obtain a desired performance. The hydrogen hybrid vehicle analyzed in the paper has a predicted range of 480 km (300 miles), with a gasoline equivalent fuel efficiency of 34.2 km/liter (80.9 mpg).
Date:
September 15, 1994
Creator:
Aceves, S. M. & Smith, J. R.
Object Type:
Article
System:
The UNT Digital Library
Effects of crack geometry and material behavior on scattering by cracks for QNDE applications
In work carried out on this project, the usual mathematical modeling of ultrasonic wave scattering by flaws is being extended to account for several typical characteristics of fatigue and stress-corrosion cracks, and the environment of such cracks. Work has been completed on scattering by macrocrack-microcrack configurations. We have also investigated reflection and transmission by a flaw plane consisting of an infinite array of randomly oriented cracks. In another investigation the propagation of mechanical disturbances in solids with periodically distributed cracks has been studied.
Date:
September 15, 1989
Creator:
Achenbach, J. D.
Object Type:
Report
System:
The UNT Digital Library
Effects of crack geometry and material behavior on scattering by cracks for QNDE applications. Technical progress report, March 1, 1988--August 30, 1989
In work carried out on this project, the usual mathematical modeling of ultrasonic wave scattering by flaws is being extended to account for several typical characteristics of fatigue and stress-corrosion cracks, and the environment of such cracks. Work has been completed on scattering by macrocrack-microcrack configurations. We have also investigated reflection and transmission by a flaw plane consisting of an infinite array of randomly oriented cracks. In another investigation the propagation of mechanical disturbances in solids with periodically distributed cracks has been studied.
Date:
September 15, 1989
Creator:
Achenbach, J. D.
Object Type:
Report
System:
The UNT Digital Library
Quantitative non-destructive evaluation of high-temperature superconducting materials
Even though the currently intensive research efforts on high-temperature superconducting materials have not yet converged on a well specified material, the strong indications are that such a material will be brittle, anisotropic, and may contain many flaws such as microcracks and voids at grain boundaries. Consequently, practical applications of high temperature superconducting materials will require a very careful strength analysis based on fracture mechanics considerations. Because of the high sensitivity of the strength of such materials to the presence of defects, methods of quantitative non-destructive evaluation may be expected to play an important role in strength determinations. This proposal is concerned with the use of ultrasonic methods to detect and characterize isolated cracks, clusters of microcracks and microcracks distributed throughout the material. Particular attention will be devoted to relating ultrasonic results directly to deterministic and statistical linear elastic fracture mechanics considerations.
Date:
September 15, 1990
Creator:
Achenbach, J. D.
Object Type:
Report
System:
The UNT Digital Library
Quantitative non-destructive evaluation of high-temperature superconducting materials. Technical progress report, September 1, 1989--August 30, 1990
Even though the currently intensive research efforts on high-temperature superconducting materials have not yet converged on a well specified material, the strong indications are that such a material will be brittle, anisotropic, and may contain many flaws such as microcracks and voids at grain boundaries. Consequently, practical applications of high temperature superconducting materials will require a very careful strength analysis based on fracture mechanics considerations. Because of the high sensitivity of the strength of such materials to the presence of defects, methods of quantitative non-destructive evaluation may be expected to play an important role in strength determinations. This proposal is concerned with the use of ultrasonic methods to detect and characterize isolated cracks, clusters of microcracks and microcracks distributed throughout the material. Particular attention will be devoted to relating ultrasonic results directly to deterministic and statistical linear elastic fracture mechanics considerations.
Date:
September 15, 1990
Creator:
Achenbach, J. D.
Object Type:
Report
System:
The UNT Digital Library
[Letter from A. M. Acheson to Henry Sayles, September 15, 1911]
Letter from A. M. Acheson to Henry Sayles discussing a meeting in Abilene with W. D. Smith.
Date:
September 15, 1911
Creator:
Acheson, Alex M.
Object Type:
Letter
System:
The Portal to Texas History
Indian Chieftain. (Vinita, Indian Terr.), Vol. 6, No. 1, Ed. 1, Thursday, September 15, 1887
Weekly newspaper from Vinita, Indian Territory. Coverage includes local, territory, and United States news, along with advertising.
Date:
September 15, 1887
Creator:
Adair, John L.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Pawhuska Daily Journal-Capital (Pawhuska, Okla.), Vol. 72, No. 180, Ed. 1 Tuesday, September 15, 1981
Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 15, 1981
Creator:
Adams, Bill
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Pawhuska Daily Journal-Capital (Pawhuska, Okla.), Vol. 73, No. 183, Ed. 1 Wednesday, September 15, 1982
Daily newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 15, 1982
Creator:
Adams, Bill
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Harper County Democrat (Buffalo, Okla.), Vol. 10, No. 24, Ed. 1 Friday, September 15, 1916
Weekly newspaper from Buffalo, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 15, 1916
Creator:
Adams, E. Lee
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Convair Supervisory Newsletter, Number 861, September 15, 1971
Newsletter written for supervisors working at the Convair Division in Fort Worth containing news about events and activities, workplace reminders, and other relevant information.
Date:
September 15, 1971
Creator:
Adams, Richard E.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Edmond Enterprise (Edmond, Okla.), Vol. 2, No. 32, Ed. 1 Thursday, September 15, 1927
Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 15, 1927
Creator:
Adamson, Royce B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Edmond Enterprise (Edmond, Okla.), Vol. 21, No. 33, Ed. 1 Thursday, September 15, 1921
Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 15, 1921
Creator:
Adamson, Royce B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Lifecycle Assessment of Beijing-Area Building Energy Use and Emissions: Summary Findings and Policy Applications
Buildings are at the locus of three trends driving China's increased energy use and emissions: urbanization, growing personal consumption, and surging heavy industrial production. Migration to cities and urban growth create demand for new building construction. Higher levels of per-capita income and consumption drive building operational energy use with demand for higher intensity lighting, thermal comfort, and plug-load power. Demand for new buildings, infrastructure, and electricity requires heavy industrial production. In order to quantify the implications of China's ongoing urbanization, rising personal consumption, and booming heavy industrial sector, this study presents a lifecycle assessment (LCA) of the energy use and carbon emissions related to residential and commercial buildings. The purpose of the LCA model is to quantify the impact of a given building and identify policy linkages to mitigate energy demand and emissions growth related to China's new building construction. As efficiency has become a higher priority with growing energy demand, policy and academic attention to buildings has focused primarily on operational energy use. Existing studies estimate that building operational energy consumption accounts for approximately 25% of total primary energy use in China. However, buildings also require energy for mining, extracting, processing, manufacturing, and transporting materials, as well as energy …
Date:
September 15, 2010
Creator:
Aden, Nathaniel; Qin, Yining & Fridley, David
Object Type:
Report
System:
The UNT Digital Library
Collaboration tools for the global accelerator network: Workshop Report
The concept of a ''Global Accelerator Network'' (GAN) has been put forward as a means for inter-regional collaboration in the operation of internationally constructed and operated frontier accelerator facilities. A workshop was held to allow representatives of the accelerator community and of the collaboratory development community to meet and discuss collaboration tools for the GAN environment. This workshop, called the Collaboration Tools for the Global Accelerator Network (GAN) Workshop, was held on August 26, 2002 at Lawrence Berkeley National Laboratory. The goal was to provide input about collaboration tools in general and to provide a strawman for the GAN collaborative tools environment. The participants at the workshop represented accelerator physicists, high-energy physicists, operations, technology tool developers, and social scientists that study scientific collaboration.
Date:
September 15, 2002
Creator:
Agarwal, Deborah; Olson, Gary & Olson, Judy
Object Type:
Report
System:
The UNT Digital Library
The Odem-Edroy Times (Odem, Tex.), Vol. 39, No. 37, Ed. 1 Thursday, September 15, 1988
Weekly newspaper from Odem, Texas that includes local, state, and national news along with advertising.
Date:
September 15, 1988
Creator:
Aguilar, Rebecca & Hall, Page
Object Type:
Newspaper
System:
The Portal to Texas History
[Letter from Frank L. Ahern to Alex Bradford, September 15, 1944]
Letter from Frank L. Ahern to Alex Bradford responding to a previous letter expressing Bradford's interest in asbestos suits for fire fighters.
Date:
September 15, 1944
Creator:
Ahern, Frank L.
Object Type:
Letter
System:
The Portal to Texas History
The Adiabatic Matching Section Solution for the Source Injector
Typical designs for a Heavy Ion Fusion Power Plant require the source injector to deliver 100 beams, packed into an array with a spacing of 7 cm. When designing source injectors using a single large aperture source for each beam, the emitter surfaces are packed into an array with a spacing of 30 cm. Thus, the matching section of the source injector must not only prepare the beam for transport in a FODO lattice, but also funnel the beams together. This can be accomplished by an ESQ matching section in which each beam travels on average at a slight angle to the axis of the quadrupoles and uses the focusing effect of the FODO lattice to maintain the angle. At the end of the matching section, doublet steering is used to bring the beams parallel to each other for injection into the main accelerator. A specific solution of this type for an 84-beam source injector is presented. PACS: 41.75.Ak,41.85.Ar, 41.85.Ja
Date:
September 15, 2000
Creator:
Ahle, L.; Grote, D. P.; Halaxa, E.; Henestroza, E.; Kwan, J. W. & Mac Laren, S. A.
Object Type:
Article
System:
The UNT Digital Library
Operability test report for core sample truck {number_sign}1 flammable gas modifications
This report primarily consists of the original test procedure used for the Operability Testing of the flammable gas modifications to Core Sample Truck No. One. Included are exceptions, resolutions, comments, and test results. This report consists of the original, completed, test procedure used for the Operability Testing of the flammable gas modifications to the Push Mode Core Sample Truck No. 1. Prior to the Acceptance/Operability test the truck No. 1 operations procedure (TO-080-503) was revised to be more consistent with the other core sample truck procedures and to include operational steps/instructions for the SR weather cover pressurization system. A draft copy of the operations procedure was used to perform the Operability Test Procedure (OTP). A Document Acceptance Review Form is included with this report (last page) indicating the draft status of the operations procedure during the OTP. During the OTP 11 test exceptions were encountered. Of these exceptions four were determined to affect Acceptance Criteria as listed in the OTP, Section 4.7 ACCEPTANCE CRITERIA.
Date:
September 15, 1997
Creator:
Akers, J.C.
Object Type:
Report
System:
The UNT Digital Library
Ex-Im Bank: No Quorum, No Problem?
This report discusses the operation on a limited basis of the Export-Import Bank (Ex-Im Bank) despite a renewal of its general statutory charter through FY2019 (P.L. 114-94,
Date:
September 15, 2016
Creator:
Akhtar, Shayerah Ilias
Object Type:
Report
System:
The UNT Digital Library