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[Letter from Don R. Roberts to Bill McCarter and Jack Davis, October 8, 1991]
Photocopy of a letter from Don R. Roberts, Superintendent of Fort Worth ISD, to Bill McCarter and Jack Davis, co-directors of North Texas Institute for Educators on the Visual Arts, in regards to FWISD's commitment to NTIEVA. Their Associate Director, Beverly Fletcher, will contribute at least 10% of her time during the 1991 - 1992 calendar year to activities related to staff development and implementation efforts. Along with thirteen art specialists devoting a substantial amount of time toward the DBAE program.
Date:
October 8, 1991
Creator:
Roberts, Don R.
Object Type:
Letter
System:
The UNT Digital Library
Radiation-driven evolution of low-mass x-ray binaries and the formation of millisecond pulsars
Recent data on low-mass X-ray binaries (LMXBs) and millisecond pulsars (MSPs) pose a challenge to evolutionary theories which neglect the effects of disk and comparison irradiation. Here we discuss the main features of a radiation-driven (RD) evolutionary model that may be applicable to several LMXBs. According to this model, radiation from the accreting compact star in LMXBs vaporizes'' the accretion disk and the companion star by driving a self-sustained mass loss until a sudden accretion-turn off occurs. The main characteristics of the RD-evolution are: (1) lifetime of RD-LMXB's is of order 10{sup 7} years or less; (2) both the orbital period gap and the X-ray luminosity may be consequences of RD-evolution of LMXB's containing lower main sequence and degeneration companion stars; (3) the companion star may transfer mass to the primary even if it underfills its Roche lobe; (4) a class of recycled MSPs can continue to vaporize the low-mass companions by a strong pulsar wind even after the accretion turn-off; (5) the RD-evolutionary model resolves the apparent statistical descrepancy between the number of MSPs and their LMXB progenitors in the Galaxy. We discuss the implications of the discovery of single MSPs in low-density globular clusters and the recent measurements …
Date:
August 8, 1991
Creator:
Tavani, M. (Lawrence Livermore National Lab., CA (United States) California Univ., Berkeley, CA (United States). Dept. of Astronomy)
Object Type:
Article
System:
The UNT Digital Library
[Greater Denton Arts Council Grants Program, Grant Deadline Reminder]
A document that details the Greater Denton Arts Council grant program, with the programs goals, who is eligible to apply, the programs limitations, requirements, deadlines, evaluation and so forth. The last page is a Grant Deadline Reminder with a deadline of April 1, 1991. The date is circled and off to the side is a handwritten note that reads, "Dr. Davis, FYI."
Date:
March 8, 1991
Creator:
Greater Denton Arts Council
Object Type:
Text
System:
The UNT Digital Library
Application of telerobotic control to remote processing of nuclear material
In processing radioactive material there are certain steps which have customarily required operators working at glove box enclosures. This can subject the operators to low level radiation dosages and the risk of accidental contamination, as well as generate significant radioactive waste to accommodate the human interaction. An automated system is being developed to replace the operator at the glove box and thus remove the human from these risks, and minimize waste. Although most of the processing can be automated with very little human operator interaction, there are some tasks where intelligent intervention is necessary to adapt to unexpected circumstances and events. These activities will require that the operator be able to interact with the process using a remote manipulator in a manner as natural as if the operator were actually in the work cell. This robot-based remote manipulation system, or telerobot, must provide the operator with an effective means of controlling the robot arm, gripper and tools. This paper describes the effort in progress in Lawrence Livermore National Laboratory to achieve this capability. 8 refs.
Date:
July 8, 1991
Creator:
Merrill, R. D.; Grasz, E. L.; Herget, C. J.; Gavel, D. T.; Addis, R. B. & DeMinico, G. A.
Object Type:
Article
System:
The UNT Digital Library
[Press release: Human Rights Campaign Fund calls on Cheney to "cease enforcement" of anti-gay and lesbian policy]
Press release from the Human Rights Foundation calling on the Pentagon to cease enforcement of its policy excluding lesbians and gay men from military service.
Date:
August 8, 1991
Creator:
Human Rights Capaign Fund
Object Type:
Text
System:
The UNT Digital Library
[Quotes from Marc Leitman]
List of quotes from Marc Leitman about his knowledge of misappropriation of funds for March on Austin 1991.
Date:
July 8, 1991
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Notes: Interview with Elizabeth Harvey]
Notes from an interview with Elizabeth Harvey in which she discussed her knowledge of the fraudulent expenditures of some members in the 1991 March on Austin Committee. INcludes handwritten notes on the back.
Date:
July 8, 1991
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 83, No. 32, Ed. 1 Thursday, August 8, 1991
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
August 8, 1991
Creator:
Reynolds, Jim
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: Security]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
March 8, 1991, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: School suicide]
Video footage from the WBAP-TV television station in Fort Worth, Texas, covering a news story. This story aired at 6pm.
Date:
January 8, 1991, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Pipe bomb]
B-roll video footage from the WBAP-TV television station in Fort Worth, Texas, covering a news story.
Date:
April 8, 1991, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Police brutality]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
April 8, 1991, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: School suicide]
Video footage from the WBAP-TV television station in Fort Worth, Texas, covering a news story. This story aired at 6pm.
Date:
January 8, 1991, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Kidnapping]
Video footage from the WBAP-TV television station in Fort Worth, Texas, covering a news story. This story aired at 10pm.
Date:
March 8, 1991, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Stabbing Dallas]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
May 8, 1991, 6:00 a.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Triple shooting (Dallas)]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
May 8, 1991, 6:00 a.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Interface stability and defect formation during crystal growth
Unidirectional solidification experiments have been carried out in organic crystals with the aim of improving our knowledge on the effects of constraints on the interface morphology and to increase our understanding of the growth of anisotropic materials. The experimental information shows that lateral constraints such as a sharp change in the cross-sectional area in the solid liquid interface path, can produce important changes in the microstructure if the interface morphology is planar, cellular or dendritic. The study of anisotropic materials cover several topics. It is first shown that slight anisotropy does not influence the dendrite tip selection criterion. This conclusion is obtained from the analysis of the relationship between tip radius and velocity for dendrites growing under the steady state condition for two different materials, CBr{sub 4} and C{sub 2}Cl{sub 6}, which have different surface energy anisotropy values. The values of the dendrite operating parameters {sigma}* are compared with the predictions of the solvability theory and the morphological stability theory. The experiments show better agreement with the latter theory. Critical experiments have been designed and carried out to find the response functions which determine the composition and temperature of the interface as a function of velocity in faceted materials. The …
Date:
January 8, 1991
Creator:
Fabietti, L.M.R.
Object Type:
Report
System:
The UNT Digital Library
Editing graphs for maximum effect
The paper contains over eighty rules for editing graphs, arranged under nine major headings in a logical sequence for editing all the graphs in a manuscript. It is excerpted from a monograph used at the Lawrence Livermore National Laboratory to train beginning technical editors in editing graphs; a corresponding Hypercard stack is also used in this training. 6 refs., 4 figs.
Date:
January 8, 1991
Creator:
Murphy, P. W. & Rhiner, R. W.
Object Type:
Article
System:
The UNT Digital Library
Gas-phase generations and rearrangement of silathiones, R sub 2 Si=S
Three routes are explored for the generation of silathiones: (1) the retroene elimination of propene from allythiodimethylsilane and 1-allythio-1-hydrido-1,2,2,2-tetramethylsilane; (2) the reaction of silylene, Me{sub 2}Di, with carbon disulfide which is thought to form a transient 3-membered ring with CS{sub 2} and the elimination of carbon disulfide to produce diethylsilathione; and (3) the beta-elimination of bis(trimethylsilythio)dimethylsilane. All these methods are explored in some detail. A second example of a silathione-silylene isomerization was observed in the pyrolysis of 1,1-bis(trimethylsilythio)-1,2,2,2-tetramethyldisilane. 89 refs., 5 figs., 10 tab. (BM)
Date:
January 8, 1991
Creator:
Kim, Chong Bok.
Object Type:
Report
System:
The UNT Digital Library
Photomodulation spectroscopy of photocarrier dynamics, electronic defects and morphology of conducting polymers
This is a progress report on the second period of activities associated with the DOE grant to the Physics Department of the University of Utah, starting on April 1st, 1991, on photocarrier dynamics, electronic defects and morphology of conducting polymers using the photomodulation spectroscopy. During the second period of this grant we have achieved impressive results and have started new studies, to be completed during the grant continuation period of the third year. We will describe our progress according to the material studied, since this is the best method to summarize our accomplishments. We have used a variety of techniques in our studies such as: CW photomodulation, photomodulation in the femtosecond and picosecond time ranges, CW resonant Raman scattering, transient photoinduced Raman scattering, electro-absorption, degenerate four-wave mixing and the newly technique of spin dependent photomodulation. These techniques have been used to obtain the transient electronic response of the studied conducing polymers.
Date:
October 8, 1991
Creator:
Vardeny, Z. V.
Object Type:
Report
System:
The UNT Digital Library
Competing electron-electron/electron-phonon interactions and polyacetylene
Using Lanczos exact diagonalization, we investigate the effects of the competition between the electro-electron and electron-phonon interactions in the context of the 1-D tight-binding Peierls-Hubbard Hamiltonian, studying various structural, optical, and vibrational properties of strongly correlated systems. We use polyacetylene as our experimental guide, and perform a parameter space search to determine the level at which a unique set of parameters can model this prototypical conducting polymer and, more generally, the applicability of the simple'' 1-D Peierls-Hubbard Hamiltonian to these highly interesting materials. 9 refs., 3 tabs.
Date:
April 8, 1991
Creator:
Gammel, J.T. (Los Alamos National Lab., NM (USA) Bayreuth Univ. (Germany, F.R.). Physics Inst.); Campbell, D.K. (Los Alamos National Lab., NM (USA)) & Loh, E.Y. Jr. (Thinking Machines Corp., Cambridge, MA (USA))
Object Type:
Article
System:
The UNT Digital Library
[Assessment of effects of surfactants in a heavy oil reservoir]
During the past three months we have carefully negotiated a joint venture to implement a pilot for testing the two enhanced oil recovery processes developed at CLD Technology, Inc. The technical staff at CLD Technology, Inc. has decided to model the heavy oil reserve on the Cantleberry Lease, the Jasmin oil field in Kern County, California. Staff members have designed a new sand pack to represent one-eighth (1/8) of a one, ten-acre, five-spot well pattern that will represent the sands of the Cantleberry lease. All calculated parameters are listed in Table 1. The 3-dimensional scaled physical model design represents a typical Cantleberry steamflood pattern. The design of the model will allow the creation of zones identical to those in the Cantleberry lease which will represent the shale break between the Cantleberry A'' and B'' sands. The last 3-dimensional scaled physical model experiment, needed to design the pilot, is ready to go awaiting continuous funding from the DOE.
Date:
April 8, 1991
Creator:
Kostura, J.A.
Object Type:
Report
System:
The UNT Digital Library
Cherokeean/Herald (Rusk, Tex.), Vol. 143, No. 27, Ed. 1 Thursday, August 8, 1991
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
August 8, 1991
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Register, Volume 16, Number 83, (Part II), Pages 6441-6500, November 8, 1991
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
November 8, 1991
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History