Collection
Office of Scientific & Technical Information Technical Reports
515
Texas State Publications
83
Office of Technology Assessment
74
Technical Report Archive and Image Library
61
National Advisory Committee for Aeronautics Collection
37
United States Experiment Station Record
30
The Federal Reporter
29
Federal Communications Commission Record
18
Texas Register
18
Texas Senate Journals
18
15 More
Serial/Series Title
Texas Parks & Wildlife
35
Experiment Station Record
30
National reporter system. United States series
29
The Federal Reporter
29
FCC Record
18
Journal of the Senate, Texas Legislature
18
Texas Register
18
NACA Annual Reports
17
House document (United States. Congress. House)
12
NACA Technical Notes
12
116 More
Country
States
Decade
Month
926 Matching Results
Results open in a new window/tab. Unexpected Results? Search the Catalog Instead.
Results:
1 - 24 of
926
next
North Texas State University Interior Design Department Report: Evaluation Report, 1976-77
Report for the North Texas State University Interior Design Department discussing curriculum, teacher statistics and activities, long term plans and goals, enrollment and graduation numbers, and statistics for post-graduation employment positions.
Date:
December 1976
Creator:
Gough, Ray; Jones, Lois; Olvera, John; Shuemaker, Ira & Thomason, Roger
Object Type:
Report
System:
The Portal to Texas History
Studies of the Performance of the ATLAS Detector Using Cosmic-Ray Muons
None
Date:
June 12, 2013
Creator:
Aad, G.
Object Type:
Article
System:
The UNT Digital Library
PVUSA procurement, acceptance, and rating practices for photovoltaic power plants
This report is one in a series of PVUSA reports on PVUSA experiences and lessons learned at the demonstration sites in Davis and Kerman, California, and from participating utility host sites. During the course of approximately 7 years (1988--1994), 10 PV systems have been installed ranging from 20 kW to 500 kW. Six 20-kW emerging module technology arrays, five on universal project-provided structures and one turnkey concentrator, and four turnkey utility-scale systems (200 to 500 kW) were installed. PVUSA took a very proactive approach in the procurement of these systems. In the absence of established procurement documents, the project team developed a comprehensive set of technical and commercial documents. These have been updated with each successive procurement. Working closely with vendors after the award in a two-way exchange provided designs better suited for utility applications. This report discusses the PVUSA procurement process through testing and acceptance, and rating of PV turnkey systems. Special emphasis is placed on the acceptance testing and rating methodology which completes the procurement process by verifying that PV systems meet contract requirements. Lessons learned and recommendations are provided based on PVUSA experience.
Date:
September 1, 1995
Creator:
Dows, R. N. & Gough, E. J.
Object Type:
Report
System:
The UNT Digital Library
Synchrotrons for heavy ions: Bevalac experience
The Bevalac should be viewed not as a model of accelerator hardware - a modern heavy ion complex will look quite different, but as a model for an operating versatile multifaceted, multiuser heavy ion facility. Of value to the planning of a new accelerator such as MARIA is the knowledge of operating modes peculiar to heavy ions and specific hardware requirements to carry out its mission with the mandated flexibility and reliability. This paper starts with a discussion of parameters and machine characteristics most suitable for medical and nuclear science applications. It then covers experience in interleaving these two research programs, and finally, concentrates on accelerator configuratin questions; injectors, repetition rate, vacuum systems and cost criteria which will be relevant to the design of MARIA.
Date:
October 1, 1980
Creator:
Grunder, H. A.; Gough, R. A. & Alonso, J. R.
Object Type:
Article
System:
The UNT Digital Library
Effect of Service Stress on Impact Resistance, X-Ray Diffraction Patterns, and Microstructure of 25S Aluminum Alloy
Report presents the results of a great number of tests made to determine the effect of service stresses on the impact resistance, the x-ray diffraction patterns, and the microstructure of 25s aluminum alloy. Many of the specimens were taken from actual propeller blades and others were cut from 13/16-inch rod furnished by the Aluminum Company of America.
Date:
1939
Creator:
Kies, J. A. & Quick, G. W.
Object Type:
Report
System:
The UNT Digital Library
Nuclear science annual report, July 1, 1977-June 30, 1978. [Lawrence Berkeley Laboratory]
Activities for the period July 1, 1977, through June 30, 1978, are reported in the following areas: experimental research (nuclear structure; nuclear reactions and scattering; relativistic heavy ions - projectile and target fragmentation, central collisions; the Table of Isotopes Project, atomic physics, and magnetic monopoles), theory of nuclear collisions (microscopic, macroscopic, relativistic), and apparatus (accelerator operations and development, nuclear instrumentation). Also included are thesis abstracts, publications lists, and an author index. Individual abstracts were prepared for 33 of the reports in this volume. (RWR)
Date:
January 1, 1978
Creator:
Schroeder, L. S.; Gough, R. A. & Nurmia, M. J. (eds.)
Object Type:
Report
System:
The UNT Digital Library
Metal impacts on microbial biomass in the anoxic sediments of a contaminated lake
Little is known about the long-term impacts of metal contamination on the microbiota of anoxic lake sediments. In this study, we examined microbial biomass and metals (arsenic, cadmium, chromium, copper, iron, lead, manganese, and zinc) in the sediments of Lake DePue, a backwater lake located near a former zinc smelter. Sediment core samples were examined using two independent measures for microbial biomass (total microscopic counts and total phospholipid-phosphate concentrations), and for various fractions of each metal (pore water extracts, sequential extractions, and total extracts of all studied metals and zinc speciation by X-ray absorption fine structure (XAFS). Zinc concentrations were up to 1000 times higher than reported for sediments in the adjacent Illinois River, and ranged from 21,400 mg/kg near the source to 1,680 mg/kg near the river. However, solid metal fractions were not well correlated with pore water concentrations, and were not good predictors of biomass concentrations. Instead, biomass, which varied among sites by as much as two-times, was inversely correlated with concentrations of pore water zinc and arsenic as established by multiple linear regression. Monitoring of other parameters known to naturally influence biomass in sediments (e.g., organic carbon concentrations, nitrogen concentrations, pH, sediment texture, and macrophytes) revealed no …
Date:
April 26, 2008
Creator:
Gough, Heidi L.; Dahl, Amy L.; Nolan, Melissa A.; Gaillard, Jean-Francois & Stahl, David A.
Object Type:
Article
System:
The UNT Digital Library
High Brightness Neutron Source for Radiography
This research and development program was designed to improve nondestructive evaluation of large mechanical objects by providing both fast and thermal neutron sources for radiography. Neutron radiography permits inspection inside objects that x-rays cannot penetrate and permits imaging of corrosion and cracks in low-density materials. Discovering of fatigue cracks and corrosion in piping without the necessity of insulation removal is possible. Neutron radiography sources can provide for the nondestructive testing interests of commercial and military aircraft, public utilities and petrochemical organizations. Three neutron prototype neutron generators were designed and fabricated based on original research done at the Lawrence Berkeley National Laboratory (LBNL). The research and development of these generators was successfully continued by LBNL and Adelphi Technology Inc. under this STTR. The original design goals of high neutron yield and generator robustness have been achieved, using new technology developed under this grant. In one prototype generator, the fast neutron yield and brightness was roughly 10 times larger than previously marketed neutron generators using the same deuterium-deuterium reaction. In another generator, we integrate a moderator with a fast neutron source, resulting in a high brightness thermal neutron generator. The moderator acts as both conventional moderator and mechanical and electrical support structure …
Date:
December 8, 2008
Creator:
Cremer, J. T.; Piestrup, Melvin A.; Gary, Charles K.; Harris, Jack L.; Williams, David J.; Jones, Glenn E. et al.
Object Type:
Report
System:
The UNT Digital Library
Detecting antipersonnel mines with a handheld parabolic reflector transmitter/multistatic receiver impulse gpr
A novel handheld time-domain array GPR antipersonnel mine detection system using an offset paraboloidal reflector antenna is described. The reflector collimates rays from an ultra-wideband transmitting feed, directing the microwave impulse forward, in front of the antenna structure. As such, much of the ground reflected wave is directed further forward, away from the operator, the reflector, and the receiving antennas, and thereby reducing the major source of clutter. The wave transmitted into the ground that interacts with the target, generating significant backscatter returning toward the receiving antennas. These receiving antennas are configured in a 2 by 2 array to provide spatial focusing in both the along- and cross-track directions. This system has been built and tested at both Lawrence Livermore National Laboratory, and GeoCenters, Inc. In both cases, custom-built wideband antenna elements generate narrow pulse shapes, which allow for resolving small non-metallic targets buried at shallow depths. The LLNL's Micro-Power Impulse Radar (MIR) operates in the 1.5 to 5 GHz range a very narrow pulse shape. The Geo-Centers wideband TEMR antenna elements have higher power, though lower frequency range (850 to 1700 MHz), and generate less residual ringing in the time signal. Preliminary measured data from both systems indicate that …
Date:
April 10, 2000
Creator:
Rappaport, C.; Yang, B.; Azevedo, S.; Rosenbury, T.; Gough, J. & Dean, A.
Object Type:
Article
System:
The UNT Digital Library
Drag Tests of 4/9-Scale Model Engine Nacelles With Various Cowlings
"Results are given of drag tests of 4/9-scale model radial air-cooled engine nacelles made as a part of a general investigation of wing-nacelle-propeller interference. A small nacelle of the type commonly used with exposed engine cylinders was tested with various forms of cowling over the cylinders. The effects of cowling-ring position and of angle of ring chord to the thrust line were investigated. An N.A.C.A. cowled nacelle and a smooth body were also tested. The results are given at 50, 75, and 100 miles per hour for -5 degrees, 0 degrees, 5 degrees, 10 degrees, 15 degrees angle of pitch" (p. 1).
Date:
October 1932
Creator:
Windler, Ray
Object Type:
Report
System:
The UNT Digital Library
Emittance measurements of high charge state argon beams from a pig source
The emittances of beams of Ar$sup 4+$ to Ar$sup 8+$ were measured in the axial and radial planes. The extraction voltage was 10 kV and the magnetic field was varied from about 0.5 to 0.6 Tesla. The anode slit was varied in distance from the arc, which was run both dc and pulsed. The emittance was nearly independent of charge state, but increased with total beam current. A small bowing of the arc column, which made evaluation of mirror field effects difficult, was discovered. (auth)
Date:
October 1, 1975
Creator:
Bex, L.; Clark, D. J.; Ellsworth, C. E.; Estrella, R. M.; Gough, R. A. & Holley, W. R.
Object Type:
Article
System:
The UNT Digital Library
Initial operation of the new Bevatron local injector
Initial operational characteristics of a new Bevatron injector system are described. It is capable of providing an independent source of ions to the Bevatron through mass 40. The new injector consists of a sputter ion PIG source, operating on a 60 kV dc platform, an RFQ linac, and two Alvarez linacs, all operating at 199 MHz. Beams with q/A greater than or equal to 0.14 are accelerated to 200 keV/n in the RFQ and to 800 keV/n in the first Alvarez tank. Each Alvarez operates in the 2..beta..lambda mode, and each is followed by a foil stripper. Beams with a q/A greater than or equal to 0.32 are accelerated through the second Alvarez to 5 MeV/n, fully stripped, and injected into the Bevatron. Because the Bevatron can be efficiently switched between this injector and the SuperHILAC injector, a more efficient operations schedule is made possible to meet the increasingly diverse needs of the Biomedical and Nuclear Science research programs. 5 refs.
Date:
May 1, 1985
Creator:
Staples, J.; Dwinell, R.; Gough, R.; Halliwell, J.; Howard, D.; Lax, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Development of a radioactive ion beam test stand at LBNL
For the on-line production of a {sup 14}O{sup +} ion beam, an integrated target--transfer line ion source system is now under development at LBNL. {sup 14}O is produced in the form of CO in a high temperature carbon target using a 20 MeV {sup 3}He beam from the LBNL 88'' Cyclotron via the reaction {sup 12}C({sup 3}He,n){sup 14}O. The neutral radioactive CO molecules diffuse through an 8 m room temperature stainless steel line from the target chamber into a cusp ion source. The molecules are dissociated, ionized and extracted at energies of 20 to 30 keV and mass separated with a double focusing bending magnet. The different components of the setup are described. The release and transport efficiency for the CO molecules from the target through the transfer line was measured for various target temperatures. The ion beam transport efficiencies and the off-line ion source efficiencies for Ar, O{sub 2} and CO are presented. Ionization efficiencies of 28% for Ar{sup +}, 1% for CO, 0.7% for O{sup +}, 0.33 for C{sup +} have been measured.
Date:
October 5, 1998
Creator:
Burke, J.; Freedman, S. J.; Fujikawa, B.; Gough, R. A.; Lyneis, C. M.; Vetter, P. et al.
Object Type:
Article
System:
The UNT Digital Library
The new AGS H/sup /minus// RFQ preinjector
The AGS will soon be replacing the 750 keV Cockcroft-Walton (C-W) preinjector for the 200 MeV linac by an RFQ preaccelerator. The motivation for this is improved reliability, simpler maintenance, and the convenience of having the source at ground potential. In addition, the fact that there will now be a 35 keV transport section between the source and the RFQ allows us to install a fast chopper at low energy, which will be used for better longitudinal matching of the linac beam to the AGS acceptance (''painting''). At the same time, the upgrade includes improving the instrumentation and controls for the entire low energy beam transport (LEBT) section of the linac. The RFQ, accelerating the H/sup /minus// beam from 35 keV to 753 keV, was designed and built at Lawrence Berkeley Laboratory. All components are designed to operate at 10 Hz repetition rate, 500 ..mu..S pulse width, although to date tests have been done at the present linac rep-rate of 5 Hz. In the following paper, the source, RFQ, 35 and 753 keV transport lines, beam choppers, and instrumentation will be described, and the performance given. The complete beamline is now operating in a test area, and will be installed …
Date:
January 1, 1988
Creator:
Alessi, J. G.; Brennan, J. M.; Brodowski, J.; Brown, H. N.; Gough, R.; Kponou, A. et al.
Object Type:
Article
System:
The UNT Digital Library
Lessons learned from the first US/Russian Federation joint tabletop exercise to prepare for conducting on-site inspections under the Comprehensive Nuclear Test Ban Treaty
A U.S./Russian Federation Joint Tabletop Exercise took place in Snezhinsk, Russia, from 19 to 24 October 1998 whose objectives were to examine the functioning of an Inspection Team (IT) in a given scenario, to evaluate the strategies and techniques employed by the IT, to identify ambiguous interpretations of treaty provisions that needed clarification, and to confirm the overall utility of tabletop exercises to assist in developing an effective Comprehensive Test Ban Treaty (CTBT) verification regime. To achieve these objectives, the United States and Russian Federation (RF) agreed that two exercises would be conducted. The first would be developed by the RF, who would act as controller and as the inspected State Party (ISP), while the United States would play the role of the IT. The roles would be reversed in the second exercise; the United States would develop the scenario and play the ISP, while the RF would play the IT. A joint control team, comprised of members of both the U.S. and RF control teams, agreed on a number of ground rules for the two exercises and established a joint Evaluation Team to evaluate both of the exercises against the stated objectives. To meet time limitations, the scope of …
Date:
March 24, 1999
Creator:
Filarowski, C.; Kreek, S.; Smith, A.; Sweeney, J.; Wild, J.; Gough, R. et al.
Object Type:
Report
System:
The UNT Digital Library
Lessons learned from the first U.S./Russian Federation joint tabletop exercise to prepare for conducting on-site inspections under the Comprehensive Nuclear Test Ban Treaty
A U.S./Russian Federation Joint Tabletop Exercise took place in Snezhinsk, Russia, from 19 to 24 October 1998, whose objectives were the following: (1) To simulate the actions of the Inspection Team (IT), including interactions with the inspected State Party (ISP), in order to examine different ways the United States and Russian Federation (RF) approach inspections and develop appropriate recommendations for the international community. (2) To identify ambiguities and contradictions in the interpretation of Treaty and Protocol provisions that might become apparent in the course of an inspection and that need clarification in connection with the development of Operational Manuals and on-site inspection (OSI) infrastructure. (3) To confirm the efficacy of using bilateral tabletop exercises to assist in developing an effective Comprehensive Test Ban Treaty (CTBT) verification regime. (4) To identify strong and weak points in the preparation and implementation methods of such exercises for the purpose of further improving possible future exercises.
Date:
March 24, 1999
Creator:
Filarowski, C.; Gough, R.; Hawkins, W.; Knowles, S.; Kreek, S.; MacLeod, G. et al.
Object Type:
Report
System:
The UNT Digital Library
Initial Results with the Berkeley On-line Mass Separator - RAMA
We have for some time been interested in developing a reasonably fast and universal (having little or no chemical selectivity) on-line mass analysis system to expand our capabilities in studying nuclei far from stability. The system selected was originally proposed by Nitschke and is termed RAMA an acronym for Recoil Atom Mass Analyzer. Basically, this system utilizes the helium-jet method to transport activity to a Sidenius hollow-cathode ion source which is coupled to a mass spectrometer. A comprehensive discussion of RAMA will appear elsewhere.
Date:
November 1, 1977
Creator:
Cerny, J.; Moltz, D. M.; Evans, H. C.; Vieira, D. J.; Parry, R. F.; Wouters, J. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Design of a superconducting linear accelerator for an Infrared Free Electron Laser of the proposed Chemical Dynamics Research Laboratory at LBL
An accelerator complex has recently been designed at LBL as part of an Infrared Free Electron Laser facility in support of a proposed Chemical Dynamics Research Laboratory. We will outline the choice of parameters and design philosophy, which are strongly driven by the demand of reliable and spectrally stable operation of the FEL for very special scientific experiments. The design is based on a 500 MHz recirculating superconducting electron linac with highest energy reach of about 60 MeV. The accelerator is injected with beams prepared by a specially designed gun-buncher system and incorporates a near-isochronous and achromatic recirculation line tunable over a wide range of beam energies. The stability issues considered to arrive at the specific design will be outlined.
Date:
August 1, 1992
Creator:
Chattopadhyay, S.; Byrns, R.; Donahue, R.; Edighoffer, J.; Gough, R.; Hoyer, E. et al.
Object Type:
Article
System:
The UNT Digital Library
An infrared free electron laser system for the proposed Chemical Dynamics Research Laboratory at LBL based on a 500 MHz superconducting linac
We describe a new design of the Infrared Free Electron Laser (IRFEL) for the proposed Chemical Dynamics Research Laboratory (CDRL) at LBL. The design and choice of parameters are dictated by the unique requirements of the CDRL scientific program. The accelerator system is based on the 500 MHz superconducting cavity technology to achieve a wavelength stability of 10[sup [minus]4].
Date:
September 1, 1992
Creator:
Kim, K. J.; Byrns, R.; Chattopadhyay, S.; Donahue, R.; Edighoffer, J.; Gough, R. et al.
Object Type:
Article
System:
The UNT Digital Library
An infrared free electron laser system for the proposed Chemical Dynamics Research Laboratory at LBL based on a 500 MHz superconducting linac
We describe a new design of the Infrared Free Electron Laser (IRFEL) for the proposed Chemical Dynamics Research Laboratory (CDRL) at LBL. The design and choice of parameters are dictated by the unique requirements of the CDRL scientific program. The accelerator system is based on the 500 MHz superconducting cavity technology to achieve a wavelength stability of 10{sup {minus}4}.
Date:
September 1, 1992
Creator:
Kim, K. J.; Byrns, R.; Chattopadhyay, S.; Donahue, R.; Edighoffer, J.; Gough, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Double-mode pulsation
Double mode pulsation is a very pervasive phenomenon in stars all over the Hertzsprung-Russell diagram. In order of increasing radius, examples are: ZZ Ceti stars, the sun, the delta Scuti stars, RR Lyrae variables, the ..beta.. Cephei variables and those related to them, Cepheids, and maybe even the Mira stars. These many modes have been interpreted as both radial and nonradial modes, but in many cases the actual mode has not been clearly identified. Yellow giants seem to be the most simple pulsators with a large majority of the RR Lyrae variables and Cepheids showing only one pulsation period. We limit this review to those very few cases for classical Cepheids and RR Lyrae variables which display two modes. For these we know many facts about these stars, but the actual cause of the pulsation in two modes simultaneously remains unknown.
Date:
July 30, 1982
Creator:
Cox, A. N.
Object Type:
Article
System:
The UNT Digital Library
Accelerator and Fusion Research Division: Summary of activities, 1986
This report contains a summary of activities at the Lawrence Berkeley Laboratory's Accelerator and Fusion Research Division for the year 1986. Topics and facilities investigated in individual papers are: 1-2 GeV Synchrotron Radiation Source, the Center for X-Ray Optics, Accelerator Operations, High-Energy Physics Technology, Heavy-Ion Fusion Accelerator Research and Magnetic Fusion Energy. Six individual papers have been indexed separately. (LSP)
Date:
April 15, 1987
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Pulsations of B stars: A review of observations and theories
The observational and theoretical status are discussed for several classes of variable B stars. The older classes now seem to be better understood in terms of those stars that probably have at least one radial mode and those that have only nonradial modes. The former are the ..beta.. Cephei variables, and the latter are the slowly rotating 53 Persei and the rapidly rotating zeta Ophiuchi variables. It seems that in this last class there are also some Be stars that show nonradial pulsations from the variations of the line shapes and their light. Among the nonradial pulsators, we must also include the supergiants which show pulsations with very short lifetimes. A review of the present observational and theoretical problems is given. The most persistent problem of the cause for the pulsations is briefly discussed, and many proposed mechanisms plus some new thoughts are presented. 57 refs., 4 figs.
Date:
January 1, 1986
Creator:
Cox, A. N.
Object Type:
Article
System:
The UNT Digital Library
Stanford Synchrotron Radiation Laboratory activity report for 1987
During 1987, SSRL achieved many significant advances and reached several major milestones utilizing both SPEAR and PEP as synchrotron radiation sources as described in this report. Perhaps the following two are worthy of particular mention: (1) SPEAR reached an all time high of 4,190 delivered user-shifts during calendar year 1987, highlights of the many scientific results are given; (2) during a 12 day run in December of 1987, PEP was operated in a low emittance mode (calculated emittance 6.4 nanometer-radians) at 7.1 GeV with currents up to 33 mA. A second undulator beam line on PEP was commissioned during this run and used to record many spectra showing the extremely high brightness of the radiation. PEP is now by far the highest brightness synchrotron radiation source in the world. The report is divided into the following sections: (1) laboratory operations; (2) accelerator physics programs; (3) experimental facilities; (4) engineering division; (5) conferences and workshops; (6) SSRL organization; (7) experimental progress reports; (8) active proposals; (9) SSRL experiments and proposals by institution; and (10) SSRL publications.
Date:
December 31, 1988
Creator:
Robinson, S. & Cantwell, K.
Object Type:
Report
System:
The UNT Digital Library