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Results:
1 - 24 of
27,329
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[Bigler Family Videos, No. 25 - At Home with Baby Christopher]
This home movie excerpt documents baby Christopher Bigler at home with his father.
Date:
{1988-09-16,1988-09-24}
Creator:
Bigler
Object Type:
Video
System:
The Portal to Texas History
Black Access Committee members, from left, Robert Swanagan, Iris Johnson, Ray Wilson and Sharon Jenkins
Photograph of a group of two men and two women standing in conversation.
Date:
05/1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
Campus view with flags.
Photograph of a view of the campus with the flags of the United States and the state of Texas.
Date:
Fall 1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Folder of The Names Project Quilt AIDS memorial]
Folder for The Names Project Quilt, a national AIDS memorial.
Date:
{1988-10-07,1988-10-08,1988-10-09,1988-10-10}
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Former Regents Reception
Photograph of ...
Date:
Spring 1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
Former Regents Reception
Photograph of ...
Date:
Spring 1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
Former Regents Reception
Photograph of ...
Date:
Spring 1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
Former Regents Reception
Photograph of ...
Date:
Spring 1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
Lee College reception for former regents, John Sylvester, right and Mrs. Sylvester talk with J.Bryan Stratton, right
Photograph of a group of three people standing in conversation.
Date:
03/1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Program for The Names Project Quilt AIDS memorial event]
Program for The Names Project Quilt AIDS memorial event.
Date:
{1988-10-07,1988-10-08,1988-10-09,1988-10-10}
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Richard Inman, right with D.K. Heard, Lee College maintenance employee at a reception held in his honor
Photograph of two men shaking hands, a third man is in the background.
Date:
12/1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
Robert Swanagan presents Gylla Headley with a $50 prize for winning dance contest at the Black Senior Gala
Photograph of a man, Robert Swanagan, handing Gylla Headley a prize.
Date:
05/1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Rock Springs Center Front #1]
Photograph of the Rock Springs Center at the Fort Worth Botanic Garden from the front. This brick building has a veranda at left, decorative flower vases and shrubs along the front, a footpath, and a gabled tiled roof. A tree is planted in the front of the building, which has a simple grass lawn.
Date:
[..1988-02]
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Sammonds Family Videos, No. 12 - Christmas 1988]
This home movie excerpt documents the Sammonds family celebrating the Christmas holiday. Footage includes a Christmas pageant at an unidentified church and the family gathered on Christmas Day. The family is seen opening presents, adults and children playing with their new toys including a remote controlled car and swords. Dave Sammonds takes control of the video camera and introduces his mother, father Ron Sammonds, grandfather, great-grandfather, William, Harold, Emily, Beth, and Laurel Sammonds.
Date:
{1988-12-11,1988-12-25,1988-12-26}
Creator:
Sammonds, Ron, Jr.
Object Type:
Video
System:
The Portal to Texas History
Symposium "Texas Politics in Transition" speakers Babe Schwartz, Richard Murray, Thomas Whatley
Photograph of three named men seated at a table with name placards, Babe Schwartz, Richard Murray and Thomas Whatley.
Date:
08/1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
[Women Airforce Service Pilots questionnaire]
A questionnaire for members of the WASP veterans' organization asking for input on items to include in the newsletter and for information on reviewers for an upcoming media project.
Date:
[..1988]
Creator:
Women Airforce Service Pilots, Board of Directors
Object Type:
Text
System:
The Portal to Texas History
Young Democrats, Gene Green
Photograph of a man standing at a podium with a microphone. There is a potted plant in front of the podium.
Date:
Spring 1988
Creator:
unknown
Object Type:
Photograph
System:
The Portal to Texas History
A 0. 5 to 3. 0 MeV monoenergetic positron beam
An adjustable, 0.5--3 MeV monoenergetic positron beam has been constructed at Brookhaven. Currently a /sup 22/Na source with a W(100) foil transmission moderator produces a 1.1 mm FWHN beam with an intensity of 3/times/10/sup 5/ e/sup +//sec at a target located downstream from the accelerator. The divergence of the beam is less than 0.1/degree/ at 2.2 MeV energy. A SOA gun with 2 lens transport system brings the beam to a focus at the entrance of an electrostatic 3 MeV Dynamitron accelerator. The post acceleration beam transport system comprises 3 focusing solenolds, 4 sets of steering magnets and a 90/degree/ double focusing bending magnet. The beam energy spread at the target is <1 keV FWHN deduced from the beam size. Below we describe the positron extraction optics and acceleration, the construction of the beamline and the beam diagnostic devices. The salient beam parameters are listed at the end of this paper. 2 refs., 3 figs., 1 tab.
Date:
1988~
Creator:
Huomo, H.; AsokaKumar, P.; Henderson, S. D.; Phlips, B. F.; Mayer, R.; McDonough, J. et al.
Object Type:
Article
System:
The UNT Digital Library
The 0/sup +/ /minus/ 1/sup +/ A = 4. lambda. -hypernuclei binding energy difference in an exact equation, separable potential calculation
None
Date:
January 1, 1988
Creator:
Gibson, B. F. & Lehman, D. R.
Object Type:
Article
System:
The UNT Digital Library
1-D closure models for slender 3-D viscoelastic free jets: von Karman flow geometry and elliptical cross section
In this paper we derive one space dimensional, reduced systems of equations (1-D closure models) for viscoelastic free jets. We begin with the three-dimensional system of conservation laws and a Maxwell-Jeffreys constitutive law for an incompressible viscoelastic fluid. First, we exhibit exact truncations to a finite, closed system of 1-D equations based on classical velocity assumptions of von Karman. Next, we demonstrate that the 3-D free surface boundary conditions overconstrain these truncated systems, so that only a very limited class of solutions exist. We then proceed to derive approximate 1-D closure theories through a slender jet asymptotic scaling, combined with appropriate definitions of velocity, pressure and stress unknowns. Our nonaxisymmetric 1-D slender jet models incorporate the physical effects of inertia, viscoelasticity (viscosity, relaxation and retardation), gravity, surface tension, and properties of the ambient fluid, and include shear stresses and time dependence. Previous special 1-D slender jet models correspond to the lowest order equations in the present asymptotic theory by an a posteriori suppression to leading order of some of these effects, and a reduction to axisymmetry. Solutions of the lowest order system of equations in this asymptotic analysis are presented: For the special cases of elliptical inviscid and Newtonian free …
Date:
January 1, 1988
Creator:
Bechtel, S. E.; Forest, M. G.; Holm, D. D. & Lin, K. J.
Object Type:
Article
System:
The UNT Digital Library
2. 5 MeV neutron source for fission cross section measurement
A 2.5 MeV neutron source has been established on the beamline of a 100 kV, 0.5 ma ion accelerator. The ion accelerator provides a 100 kV deuteron beam of about 200 ..mu..a into a 3 mm beam spot at the target position. The neutron source is produced by the D(d,n)/sup 3/He reaction with a yield of about 10/sup 7/ n/sec. The time-correlated associated particle method (TCAP) is utilized for the neutron fluence determination and for neutron background elimination. The /sup 3/He associated particles are detected at 90 degrees behind a thin aluminum foil and the corresponding neutrons are emitted at 73.5 degrees with an energy near 2.5 MeV. Also, the protons from the competing D(d,p)T reaction are monitored at 135 degrees for normalization and diagnostic purposes. A fission chamber containing six uranium tetrafluoride deposits has been designed for use in the /sup 235/U(n,f) cross section measurement at 2.5 MeV. The 5 cm diameter deposits range in thickness from 230--300 ..mu..g/cm/sup 2/ and are expected to have good uniformity. A description of the 2.5 MeV neutron source facility is presented along with details of the associated particle detection and neutron beam characteristics. Preparations for the fission cross section measurement are discussed. …
Date:
January 1, 1988
Creator:
Duvall, K. C.; Wasson, O. A. & Ma, Honchang
Object Type:
Article
System:
The UNT Digital Library
3-D magnetic field calculations for wiggglers using MAGNUS-3D
The recent but steady trend toward increased magnetic and geometric complexity in the design of wigglers and undulators, of which tapered wigglers, hybrid structures, laced electromagnetic wigglers, magnetic cladding, twisters and magic structures are examples, has caused a need for reliable 3-D computer models and a better understanding of the behavior of magnetic systems in three dimensions. The capabilities of the MAGNUS-3D Group of Programs are ideally suited to solve this class of problems and provide insight into 3-D effects. MAGNUS-3D can solve any problem of Magnetostatics involving permanent magnets, linear or nonlinear ferromagnetic materials and electric conductors of any shape in space. The magnetic properties of permanent magnets are described by the complete nonlinear demagnetization curve as provided by the manufacturer, or, at the user's choice, by a simpler approximation involving the coercive force, the residual induction and the direction of magnetization. The ferromagnetic materials are described by a magnetization table and an accurate interpolation relation. An internal library with properties of common industrial steels is available. The conductors are independent of the mesh and are described in terms of conductor elements from an internal library.
Date:
January 1, 1988
Creator:
Pissanetzky, S. & Tompkins, P.
Object Type:
Article
System:
The UNT Digital Library
A 4. pi. tracking magnetic spectrometer for RHIC
A tracking magnetic spectrometer based on large Time Projection Chambers (TPC) was previously proposed to measure the momentum of charged particles emerging from the RHIC beam pipe at angles larger than four degrees and to identify the particle type for those beyond fifteen degrees with momenta up to 700 MeV/c, which is a large fraction of the final charged particles emitted by a low cm rapidity quark-gluon plasma. Experimental progress in the successful performance of a TPC developed for AGS E-810 is reported. We have also included typical results of our event generator which contains an interface of an improved HIJET and a plasma bubble model. Typical plasma signals one can expect from this model are presented. 4 refs., 9 figs.
Date:
January 1, 1988
Creator:
Lindenbaum, S. J.
Object Type:
Article
System:
The UNT Digital Library
6-Acetyldihydrohomopterin and sepiapterin affect some GTP cyclohydrolase I's and not others
The first enzyme in pteridine biosynthesis, GTP cyclohydrolase I, is a likely site for regulation of pteridine biosynthesis to occur. GTP cyclohydrolase I responds to hormonal treatment and is found altered in a variety of mice with genetically based neurological and immunological disorders. Genetic loci can greatly modify the activity of GTP cyclohydrolase: Punch mutant in Drosophila hph-1 in mouse and atypical phenylketonuria in human. This report examines the ability of Ahp and sepiapterin to alter the activity of GTP cyclohydrolase I from mouse liver, rat liver and Drosophila head. 20 refs., 2 tabs.
Date:
1988~
Creator:
Jacobson, K. Bruce & Manos, Richard E.
Object Type:
Article
System:
The UNT Digital Library