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327
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308
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256
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203
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188
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Oklahoma Publishing Company Photography Collection
9,195
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6,585
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5,946
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5,173
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2,995
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2,428
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1,564
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961
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[Family Making Apple Butter]
Photograph of a family peeling apples to make apple butter in Cumberland Gap, Tennessee. The family consists of a woman, a young man, a boy, and a girl. They sit around a barrel of apples, using knifes to peel them.
Date:
[..1981]
Creator:
Clark, Joe
Object Type:
Photograph
System:
The UNT Digital Library
3. 6 simplified methods for design
Simplified design analysis methods for elevated temperature construction are classified and reviewed. Because the major impetus for developing elevated temperature design methodology during the past ten years has been the LMFBR program, considerable emphasis is placed upon results from this source. The operating characteristics of the LMFBR are such that cycles of severe transient thermal stresses can be interspersed with normal elevated temperature operational periods of significant duration, leading to a combination of plastic and creep deformation. The various simplified methods are organized into two general categories, depending upon whether it is the material, or constitutive, model that is reduced, or the geometric modeling that is simplified. Because the elastic representation of material behavior is so prevalent, an entire section is devoted to elastic analysis methods. Finally, the validation of the simplified procedures is discussed.
Date:
January 1, 1981
Creator:
Nickell, R.E. & Yahr, G.T.
Object Type:
Article
System:
The UNT Digital Library
[4-panel piece, handmade paper on silk]
The artwork consists of four panels each turned on point. A grid ladder pattern turned in various directions appears in each panel. The colors are warm reddish browns and light blues. Other rectangular and triangular outlined shapes appear scattered across the panels.
Date:
1981~
Creator:
Spear, Shigeko
Object Type:
Artwork
System:
The UNT Digital Library
6 electronic preludes
Access:
Use of this item is restricted to the UNT Community
Recording of Bohdan Mazurek's 6 electronic preludes for tape.
Date:
1981
Creator:
Mazurek, Bohdan
Object Type:
Sound
System:
The UNT Digital Library
8 Deustche Tänze
Access:
Use of this item is restricted to the UNT Community
Recording of Peter Wessing's 8 Deutsche Tanze.
Date:
1981/1982
Creator:
Wessing, Peter
Object Type:
Sound
System:
The UNT Digital Library
10-joule high-voltage trigger micro Marx
A low energy Marx generator makes a convenient trigger for various spark gaps. With an output around 200 kV and a risetime less than 2 ns, the micro-Marx can multichannel field distortion gaps or fire a number of gaps without much gap-to-gap isolation. This design features small size, low cost, and good triggering characteristics. The complete unit is shown.
Date:
January 1, 1981
Creator:
Platts, D. A.
Object Type:
Article
System:
The UNT Digital Library
10-kA pulsed power supply for superconducting coils
A new 4-MW inductor-converter bridge (ICB) for supplying power to pulsed superconducting magnets is under construction at Argonne National Laoratory. This is a second-generation ICB built at Argonne Lab. The analytical, design, and control techniques developed for the first prototype have been used in the design of the new system. The paper presents the important considerations in the design of the new ICB. A brief description of the operation of the circuit is also given.
Date:
January 1, 1981
Creator:
Ehsani, M.; Fuja, R. E. & Kustom, R. L.
Object Type:
Article
System:
The UNT Digital Library
10-MWe solar-thermal central-receiver pilot plant, solar facilities design integration: collector-field optimization report (RADL item 2-25)
Appropriate cost and performance models and computer codes have been developed to carry out the collector field optimization, as well as additional computer codes to define the actual heliostat locations in the optimized field and to compute in detail the performance to be expected of the defined field. The range of capabilities of the available optimization and performance codes is described. The role of the optimization code in the definition of the pilot plant is specified, and a complete description of the optimization process itself is given. The detailed cost model used by the optimizer for the commercial system optimization is presented in the form of equations relating the cost element to each of the factors that determine it. The design basis for the commercial system is presented together with the rationale for its selection. The development of the individual heliostat performance code is presented. Use of the individual heliostat code in a completed study of receiver panel power under sunrise startup conditions is described. The procedure whereby performance and heliostat spacing data from the representative commercial-scale system are converted into coefficients of use in the layout processor is described, and the actual procedure used in the layout processor is …
Date:
January 1, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
15 Mile Road/Edison Corridor Sewer Tunnel Failure Study, Detroit Area, Michigan
Partial abstract: "The study consisted of field and laboratory investigations, construction evaluation, and geotechnical and structural analyses to determine the cause(s) of distress and failure of a 2600-ft section of 12-ft 9-in. diameter concrete-lined sanitary sewer tunnel in the Detroit, Mich., area. [...] The report includes summaries of all pertinent construction records, results of all pertinent past and current field and laboratory tests on construction and geotechnical materials, and detailed geotechnical and structural analyses based on observed conditions and measured parameters."
Date:
January 1981
Creator:
Albert, Dick; Hoff, George C.; Lorence, Brian; Mitchell, Gerald B.; Mlakar, Paul F.; Murphy, William L. et al.
Object Type:
Report
System:
The UNT Digital Library
28-nm laser damage testing of LIF
We have tested several samples of LIF, both single crystal and press forged, for damage resistance to 10-ns 248-nm pulses at 35 pps. The damage thresholds - the highest levels at which no damage could be produced - ranged from 4 to 6 J/cm/sup 2/ although some test sites survived irradiation at approx. 30 J/cm/sup 2/. We observed that bulk damage is the primary failure mechanism in single crystal and press forged samples and that both types exhibit the same resistance to laser damage.
Date:
January 1, 1981
Creator:
Foltyn, S. R. & Newman, B. E.
Object Type:
Article
System:
The UNT Digital Library
30-kV Proton Injector for PIGMI
A 30-kV proton injector designed for matching a 31-mA proton beam into the radio-frequency quadrupole (RFQ) section of the PIGMI accelerator has been constructed and tested. This injector uses a small efficient duoplasmatron ion source and a single-gap extraction system for creating a convergent ion beam, and a three-element unipotential einzel lens for focusing the ion beam into the RFQ. A description of this prototype injector is presented, along with the experimental data obtained during the testing of this system.
Date:
January 1, 1981
Creator:
Hamm, R. W.; Mueller, D. W. & Sturgess, R. G.
Object Type:
Article
System:
The UNT Digital Library
30-MJ superconducting magnetic energy storage for BPA transmission-line stabilizer
The Bonneville Power Administration operates the transmission system that joins the Pacific Northwest and southern California. A 30 MJ (8.4 kWh) superconducting Magnetic Energy Storage (SMES) unit with a 10 MW converter can provide system damping for low frequency oscillations. The unit is scheduled to operate in late 1982. Progress to date is described. The coil is complete. All major components of the electrical and cryogenic systems have been received and testing has begun. Computer control hardware is in place and software development is proceeding. Support system components and dewar lid are being fabricated and foundation design is complete. A contract for dewar fabrication is being negotiated.
Date:
January 1, 1981
Creator:
Schermer, R.I.
Object Type:
Article
System:
The UNT Digital Library
30-MJ superconducting magnetic-energy storage for BPA transmission-line stabilizer
The Bonneville Power Administration operates the transmission system that joins the Pacific Northwest and southern California. A 30 MJ (8.4 kWh) Superconducting Magnetic Energy Storage (SMES) unit with a 10 MW converter can provide system damping for low frequency oscillations. The unit is scheduled to operate in 1982. Progress during FY 81 is described. The coil is complete. All major components of the electrical and cryogenic systems have been received and testing has begun. Computer control hardware is in place and software development is proceeding. Support system components and dewar lid are being fabricated and foundation design is complete. A contract for dewar fabrication is being negotiated.
Date:
January 1, 1981
Creator:
Schermer, R. I.
Object Type:
Article
System:
The UNT Digital Library
30-MJ superconducting magnetic energy storage for electric-transmission stabilization
The Bonneville Power Administration operates the electric power transmission system that connects the Pacific Northwest and southern California. The HVAC interties develop 0.35 Hz oscillations when the lines are heavily loaded. A 30 MJ (8.4 kWh) Superconducting Magnetic Energy Storage (SMES) unit with a 10 MW converter can provide system damping for the oscillation. The unit is scheduled for installation in 1982 and operation in 1982-83. Status of the project is described. The conductor has been fully tested electrically and mechanically and the 5 kA superconducting cable has been produced. The 30 MJ superconducting coil is essentially complete. All major components of the electrical and cryogenic systems except the nonconducting dewar have been completed. The refrigerator and converter are undergoing tests. The system is to be located at the BPA Tacoma Substation and operated by microwave link from Portland, OR.
Date:
January 1, 1981
Creator:
Turner, R. D. & Rogers, J. D.
Object Type:
Article
System:
The UNT Digital Library
['81 Razzle Dazzle Dallas flyer]
A flyer for the 1981 Razzle Dazzle in Dallas on June 20.
Date:
1981
Creator:
Razzle Dazzle Dallas, Inc.
Object Type:
Text
System:
The UNT Digital Library
100-kV, 2-ns risetime, dc-coupled probe
A high-voltage probe has been designed and constructed; it is unique because it may be used for both high-voltage dc and for transient measurements. The probe is rated at 100-kV dc with a short transient rating of 150-kV peak. System risetime is less than 2 ns. The input impedance is 1000 M..cap omega.. shunted by 13 pF. A distributed RC network providing the desired attenuation is housed in a 25.4-cm-dia cylindrical housing. A 15.2-m length of coaxial cable connects the probe to a termination network at the oscilloscope input. The oscilloscope input impedance must be at least 100 k..cap omega.. to maintain the correct dc attenuation ratio.
Date:
January 1, 1981
Creator:
Power, J.; Nunnally, W. & Young, D.
Object Type:
Article
System:
The UNT Digital Library
360/sup 0/ digital phase detector with 100-kHz bandwidth
The general availability of digital circuit components with propagation delay times of a few nanoseconds makes a digital phase detector with good bandwidth feasible. Such a circuit has a distinct advantage over its analog counterpart because of its linearity over wide range of phase shift. A phase detector that is being built at Los Alamos National Laboratory for the Fusion Materials Irradiation Test (FMIT) project is described. The specifications are 100-kHz bandwidth, linearity of +- 1/sup 0/ over +- 180/sup 0/ of phase shift, and 0.66/sup 0/ resolution. To date, the circuit has achieved the bandwidth and resolution. The linearity is approximately +- 3/sup 0/ over +- 180/sup 0/ phase shift.
Date:
January 1, 1981
Creator:
Reid, D.W.; Riggin, D.; Fazio, M.V.; Biddle, R.S.; Patton, R.D. & Jackson, H.A.
Object Type:
Article
System:
The UNT Digital Library
870. 8-keV gamma ray from PuO₂
A /sup 252/Cf neutron source and an /sup 241/Am alpha source were used with isotopically enriched water containing 43.9% /sup 17/O and 43.1% /sup 18/O, to study the (n,n'UPSILON) and (..cap alpha..,..cap alpha..'UPSILON) reactions in /sup 17/O and /sup 18/O. The production yields for the 870.8-keV gamma ray from /sup 17/O and the 1982.2-keV gamma ray from /sup 18/O were measured. In addition, the average cross sections over the /sup 252/Cf fission neutron spectrum for /sup 17/O(n,n'UPSILON)/sup 17/O and /sup 18/O(n,n'UPSILON)/sup 18/O were determined.
Date:
January 1, 1981
Creator:
Hsu, H.H.
Object Type:
Article
System:
The UNT Digital Library
1981 Children at Okeene City Park
Photograph of Karen McPhearson (daughter of Ricky and Tracee (Schwartz) McPhearson, Alex Wiederstein (son of Rick and Kathy (Schwartz) Wiederstein and Barbara Rauh (daughter of Stan and MaryJac Rauh) at Okeene City Park, 1981.
Date:
1981
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[1981 Flood Scene - Lytle Lake Spillway]
Photograph of of the spillway at Lytle Lake after a flood.
Date:
1981
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
22nd Annual Report
The ACIR Library is composed of publications that study the interactions between different levels of government. This document is an annual report.
Date:
January 1981
Creator:
United States. Advisory Commission on Intergovernmental Relations.
Object Type:
Book
System:
The UNT Digital Library
Aberrations and focusability in large solid-state-laser systems
Solid state lasers for fusion experiments must reliably deliver maximum power to small (approximately .5 mm) targets from stand-off focal distances of 1 m or more. This requirement places stringent limits upon the optical quality of the several major components - amplifiers, Faraday isolators, spatial filters - in each amplifier train. Residual static aberrations in optical components are transferred to the beam as it traverses the optical amplifier chain. Although individual components are typically less than lambda/20 for components less than 10 cm clear aperture; and less than lambda/10 for components less than 20 cm clear aperture; the large number of such components in optical series results in a wavefront error that may exceed one wave for modern solid state lasers. For pulse operation, the focal spot is additionally broadened by intensity dependent nonlinearities. Specific examples of the performance of large aperture components will be presented within the context of the Argus and Shiva laser systems, which are presently operational at Lawrence Livermore National Laboratory. Design requirements upon the larger aperture Nova laser components, up to 74 cm in clear aperture, will also be discussed; these pose a significant challenge to the optical industry.
Date:
January 1, 1981
Creator:
Simmons, W.W.
Object Type:
Article
System:
The UNT Digital Library
Abilene Christian University Homecoming Speech
Speech delivered by Dr. LeMoine G. Lewis, Professor of Bible, for the 75th Homecoming celebration at Abilene Christian University. He reminds students and alumni in the crowd about stories from ACU’s past and present.
Date:
1981?
Creator:
Lewis, LeMoine G.
Object Type:
Sound
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 27, 1981
Program for an Abilene Philharmonic concert that ran from January 27th to February 24th (third and fourth symphony concerts) during the 31st season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1981
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History