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[Letter from Cassandra Broadus to Jeannie Sellmeyer, December 17, 1990]
Photocopy of a letter from Cassandra Broadus to Jeannine Sellmeyer, Director of Education at the Denton Co. Historical Museum, writing how much Broadus enjoyed the Docent Training Workshop and for giving Broadus an opportunity to work with the docents. Enclosed in the letter to Sellmeyer, Broadus has sent teacher packets and museum education brochures from Meadows Museum at SMU, to help Sellmeyer gather new ideas for her education tour at the Historical Museum. Teacher packets not present with letter.
Date:
December 17, 1990
Creator:
Broadus, Cassandra
Object Type:
Letter
System:
The UNT Digital Library
Prototype photon position monitors for undulator beams at the Advanced Light Source
Design criteria are described, and test results are presented, for prototype ALS undulator beam position monitors. The design is based on monitors presently in use at NSLS, with modifications to account for the widely varying and large K values of the undulators to be installed at the ALS. In particular, we have modified the design to simplify the thermal engineering and we have explored techniques to suppress the response of the monitors to soft photons, so that the beam position can be determined by measuring the higher energy photons which are better collimated. 4 refs., 8 figs.
Date:
October 17, 1990
Creator:
Warwick, T.; Shu, D. (Lawrence Berkeley Lab., CA (United States)); Rodricks, B. (Argonne National Lab., IL (United States)) & Johnson, E.D. (Brookhaven National Lab., Upton, NY (United States))
Object Type:
Article
System:
The UNT Digital Library
Thermally Induced Structural Changes in Coal Combustion
The effect of particle shape on char burnout is investigated in the limit of shrinking core combustion. As a first step, the particle temperature is assumed to proceed in the shrinking core regime and under conditions of negligible Stefan flow. The problem then reduces to calculating the oxygen concentration field around a non-spherical particle with the oxidation reaction taking place on the external surface. This problem has been addressed by an analytical technique and a numerical technique. An analytical technique known as domain perturbation'' was used to examine the change due to reaction in the shape of a slightly nonspherical, but axisymmetric, particle. It was found that the aspect ratio always increases with conversion, i.e., the particle becomes less spherical. A numerical technique, based on the boundary integral'' method was developed to handle the case of an axisymmetric particle with otherwise arbitrary shape. Numerical results are presented which again show the aspect ratio to increase with conversion. 8 refs.
Date:
January 17, 1990
Creator:
Gavalas, G. R. & Flagan, R. C.
Object Type:
Report
System:
The UNT Digital Library
Development of improved iron Fischer-Tropsch catalysts
The objective of proposed research is development of catalysts with enhanced slurry phase activity and better selectivity to fuel range products, through a more detailed understanding and systematic studies of the effects of pretreatment procedures and promoters/binders (silica) on catalyst performance.
Date:
June 17, 1990
Creator:
Bukur, D.B.
Object Type:
Report
System:
The UNT Digital Library
Control of pyrite surface chemistry in physical coal cleaning
To better understand the flotation behavior of coal pyrite, studies have been initiated to characterize the floatability of coal pyrite and mineral pyrite. The hydrophobicity of coal material pyrite was examined over a range of pH and oxidation times. The results indicate that surface oxidation plays an important role in coal and mineral pyrite hydrophobicity. The hydrophobicity of mineral pyrite decreases with increasing oxidation time (20 min. to 5 hr.) and increasing pH (pH 4.6 to 9.2), with maximum depression occurring at pH 9.2. However, coal pyrite exhibited low floatability, even at the lowest oxidation time, over the entire pH range. X-ray photoelectron spectroscopy (XPS) results suggest the growth of an oxidized iron layer as being responsible for the deterioration in floatability, while a sulfur-containing species present on the sample surfaces may promote floatability. Preliminary studies of the effect of frother indicate an enhancement in the floatability of both coal and mineral pyrite over the entire pH range.
Date:
January 17, 1990
Creator:
Luttrell, G. H.; Yoon, R. H.; Zachwieja, J. & Lagno, M.
Object Type:
Report
System:
The UNT Digital Library
Faculty Recital: 1990-09-17 - Pamela Mia Paul, piano
Access:
Use of this item is restricted to the UNT Community
Faculty recital performed at the UNT College of Music Recital Hall.
Date:
September 17, 1990
Creator:
Paul, Pamela Mia
Object Type:
Sound
System:
The UNT Digital Library
[Photograph 2012.201.B0145.0023]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Jim Couch, director of water and wastewater for Oklahoma City."
Date:
May 17, 1990
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0493]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Home buyers want to know efficiency ratings of air conditioners and furnaces," said builder Steve Cook."
Date:
January 17, 1990
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0148.0197]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "A U.S. Air Force jet fighter crash-landed Wednesday at the Seminole Municipal Airport, but both occupants walked away from the wrecked plane after it scooted about 400 yards past the end of the runway and hurdled a fence."
Date:
January 17, 1990
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0312B.0116]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Tommy Lee Jones, Actor"
Date:
March 17, 1990
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0307B.0191]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Oklahoma's Jackie Jones shoots around North Carolina's Henrik Rodl, in front of George Lynch (34) and over a fallen Kevin Madden during Saturday's loss in Austin, Texas."
Date:
March 17, 1990
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Quantum measurement and the mind-brain connection
It is argued that quantum measurements do pose a problem, within the context created by the fundamental aim of science, which is identified as the construction of a cohesive, comprehensive, and rationally coherent idea of the nature of the world in which we live. Models of nature are divided into two classes: (1), those in which there is a selection process that, for any possible measurement, would, if that measurement were to be performed, pick out one single outcome, and, (2), all others. It is proved that any model of class that reproduces the predictions of quantum theory must violate the condition that there be no faster-than-light influences of any kind. This result is used to motivate the study of models in which unitary evolution is maintained and there is no selection of unique outcomes. A consideration of ontic probabilities, historical records, and the form of the mind-brain connection leads to an elaboration of the Everett many-worlds interpretation that appears to provide the basis of satisfactory solution of the measurement problem. 18 refs.
Date:
October 17, 1990
Creator:
Stapp, Henry P.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0352.0688]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
October 17, 1990
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0352.0691]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
October 17, 1990
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0310B.0341]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "It's tough enough for most people to tell identical twins apart."
Date:
October 17, 1990
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0353.0075]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gov. Henry Bellmon and the State Arts council of Oklahoma honored 27 arts leaders and organizations statewide Wednesday."
Date:
October 17, 1990
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0352.0689]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
October 17, 1990
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0232.0082]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Kim Gutowsky-vanderWal, a member of Stress Care Professionals, works on tense shoulder muscles as a demonstration of on-site massage techniques using her husband, Ron vanderWal, as a model."
Date:
September 17, 1990
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0257.0248]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Susan Hermes gives Leon Royer a flower."
Date:
January 17, 1990
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0245.0629]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
March 17, 1990
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0250.0735]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Gerry Harris"
Date:
February 17, 1990
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0264.0197]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Wicked Destiny jumps to the lead out of the starting gate during Saturday's premier race at Remington Park."
Date:
March 17, 1990
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0227.0326]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Samuel and Jewel Graves show off their award received Tuesday for 27 years of foster parenting, while Gwendolyn Morris, left, and Phil Watson look on."
Date:
April 17, 1990
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0335.0103]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Oklahoma City mascots will join in the fun at the "Halloween Magic" celebration at Kirkpatrick Center."
Date:
October 17, 1990
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History