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34,519 Matching Results

Start Over Access Open Access Year 1982

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Results: 1 - 24 of 34,519 next

(open access)

A 0. 4 mm Interferometer System Using Dielectric Waveguide

A 0.4 mm submillimeter-wave, phase-modulated polarimeter/interferometer is used for simultaneous time-dependent measurement of line-averaged electron density and poloidal field-induced Faraday rotation along chords of the plasma column in ISX-B tokamak. Heterodyna detection and hollow dielectric waveguide are utilized to achieve the high sensitivity required for the multichord equipment.

Date: January 1, 1982

Creator: Hutchinson, D. P.; Ma, C. H.; Staats, P. A. & Vander Sluis, K. L.

Object Type: Article

System: The UNT Digital Library

(open access)

0/sup -/ to 0/sup +/ beta decay in A = 16

Techniques and results of the measurement of the beta-decay rate of the first excited state of /sup 16/N to the ground state of /sup 16/O are reported. Energy levels involved in the decay are shown, and the /sup 16/N 0/sup -/ beta decay branching ration is given. (WHK)

Date: January 1, 1982

Creator: Gagliardi, C.; Garvey, G. T.; Wrobel, J. R. & Freedman, S. J.

Object Type: Article

System: The UNT Digital Library

(open access)

1-D hybrid code for FRM start-up

A one-D hybrid has been developed to study the start-up of the FRM via neutral-beam injection. The code uses a multi-group numerical model originally developed by J. Willenberg to describe fusion product dynamics in a solenoidal plasma. Earlier we described such a model for use in determining self-consistent ion currents and magnetic fields in FRM start-up. However, consideration of electron dynamics during start-up indicate that the electron current will oppose the injected ion current and may even foil the attempt to achieve reversal. For this reason, we have combined the multi-group ion (model) with a fluid treatment for electron dynamics to form the hybrid code FROST (Field Reversed One-dimensional STart-up). The details of this merger, along with sample results of operation of FROST, are given.

Date: January 1, 1982

Creator: Stark, R. A. & Miley, G. H.

Object Type: Article

System: The UNT Digital Library

(open access)

1-/sup 11/C-D-glucose and related compounds

The novel compounds 1-/sup 11/C-D-glucose, 1-/sup 11/C-D-mannose, 1-/sup 11/C-D-galactose, 2-/sup 11/C-D-glucose, 2-/sup 11/C-D-mannose and 2-/sup 11/C-D-galactose which can be used in nuclear medicine to monitor the metabolism of glucose and galactose can be rapidly prepared by reaction of the appropriate aldose substrate with an alkali metal /sup 11/C-labeled cyanide followed by reduction with a Raney alloy in formic acid.

Date: January 26, 1982

Creator: Shiue, Chyng-Yann & Wolf, Alfred P.

Object Type: Patent

System: The UNT Digital Library

(open access)

2. 6/sup 0/K refrigeration system for CBA magnet testing

The superconducting magnets for the accelerator's rings will be cooled by a forced flow supercritical helium system from a central refrigeration plant. The design temperature for these magnets varies from 2.6 to 3.8/sup 0/K depending on a magnet's location in the ring. This paper describes the forced flow cooling system for testing a prototype magnet near 2.6/sup 0/K; this lowest temperature being of special interest to evaluate magnet quench protection. The test forced flow cooling system uses a three-stage approach, including an ejector pumped bath, similar to a cycle described previously. The coolant exists at 3.8/sup 0/K from these first stages and is then cooled further in a 64 cm diameter by 3 m high shielded liquid helium dewar. The supercritical helium gas passes through a submerged copper coil in this bath which is pumped to a pressure of 65 mm absolute by a screw compressor system. Temperatures are measured by thermistors located in the gas stream, and also embedded in the magnet coil.

Date: January 1, 1982

Creator: Bamberger, Joseph A.

Object Type: Article

System: The UNT Digital Library

(open access)

[2 carbon copies of bills from Don Maison to Richard Schwiderski - dated 9/24/82 and 10/8/82]

A pair of carbon-copied bills from Donald J. Maison to Richard Craig Schwiderski for attorney services rendered in the State of Texas v. Richard Craig Schwiderski case.

Date: 1982-09-24/1982-10-08

Creator: Maison, Donald J.

Object Type: Text

System: The UNT Digital Library

(open access)

2-D Eulerian hydrodynamics with fluid interfaces, self-gravity and rotation

The purpose of this paper is to describe in detail the numerical approach we have developed over the past five years for solving 2-dimensional gas-dynamical problems in astrophysics involving inviscid compressible flow, self-gravitation, rotation, and fluid instabilities of the Rayleigh-Taylor and Kelvin-Helmholtz types. The computer code to be described has been applied most recently to modeling jets in radio galaxies (Norman et al. 1981, 1982) and is an outgrowth of a code developed for studying rotating protostellar collapse (Norman, Wilson and Barton 1980; Norman 1980). This basic methodology draws heavily on the techniques and experience of James R. Wilson and James M. LeBlanc of the Lawrence Livermore National Laboratory, and thus the code is designed to be a general purpose 2-D Eulerian hydrocode, and is characterized by a high degree of simplicity, robustness, modularity and speed. Particular emphases of this article are: (1) the recent improvements to the code's accuracy through the use of vanLeer's (1977) monotonic advection algorithm, (2) a discussion of the importance of what we term consistent advection, and (3) a description of a numerical techique for modeling dynamic fluid interfaces in multidimensional Eulerian calculations developed by LeBlanc. 23 refs., 14 figs.

Date: January 1, 1982

Creator: Norman, M.L. & Winkler, K.H.A.

Object Type: Article

System: The UNT Digital Library

(open access)

2-D skin-current toroidal-MHD-equilibrium code

A two-dimensional, toroidal, ideal MHD skin-current equilibrium computer code is described. The code is suitable for interactive implementation on a minicomptuer. Some examples of the use of the code for design and interpretation of toroidal cusp experiments are presented.

Date: September 1, 1982

Creator: Feinberg, B.; Niland, R. A.; Coonrod, J. & Levine, M. A.

Object Type: Report

System: The UNT Digital Library

(open access)

S = -2 dibaryons and hypernuclei

Future prospects for the exploration of doubly strange hypernuclear systems are evaluated. Such systems may be produced via the double strangeness exchange reactions (K/sup -/,K/sup +/) or (K/sup -/,K/sup 0/) on nuclear targets. Theoretical estimates are given of the formation cross sections for Xi/sup -/ hypernuclear states via the one-step K/sup -/p ..-->.. K/sup +/Xi/sup -/ process, or discrete states of the ..lambda lambda.. hypernucleus in the two step reaction K/sup -/p ..-->.. ..pi../sup 0/..lambda.. followed by ..pi../sup 0/p ..-->.. K/sup +/..lambda... Recently, there has been much discussion of six quark (dibaryon) states in the Bag Model. Arguments are given which indicate that the (K/sup -/,K/sup +/) reaction on light nuclear targets (ex. /sup 3/He) affords a very promising way of producing the lowest-lying S = -2 dibaryon (called the H).

Date: January 1, 1982

Creator: Dover, C.B.

Object Type: Article

System: The UNT Digital Library

(open access)

3-D solution of flow in an infinite square array of circular tubes by using boundary-fitted coordinate system

Heat transfer and fluid flow over circular tubes have wide applications in the design of heat exchangers and nuclear reactors. However, it is often difficult to accurately calculate the detailed velocity and temperature distributions of the flow because of the complex geometry involved in the analysis, and a lack of an appropriate coordinate system for the analysis. Boundary conditions on the surfaces of the tubes are often interpolated. This interpolation process introduces inaccuracy. To overcome this difficulty, the present study used the technique of the boundary-fitted coordinate system. In this technique, all the physical boundaries are transformed into constant coordinate lines in the transformed coordinates. Therefore, the boundary conditions can be specified on the grid points without interpolation.

Date: January 1, 1982

Creator: Chen, B. C. J.; Chien, T. H.; Sha, W. T. & Kim, J. H.

Object Type: Article

System: The UNT Digital Library

(open access)

3 mm Anisotropy Measurement: On the Quadrupole Component in theCosmic Background Radiation

We have mapped the large-scale anisotropy in the cosmic background radiation at 3 mm wavelength using a liquid-helium-cooled balloon-borne radiometer sensitive enough to detect the dipole in one gondola rotation (1 minute). Statistical errors on the dipole and quadrupole components are below 0.1 mK with less than 0.1 m K galactic contribution. We find a dipole consistent with previous measurements but disagree with recent quadrupole reports. The measurement is also useful in searching for spectral distortions.

Date: November 1, 1982

Creator: Lubin, Philip M.; Epstein, Gerald L. & Smoot, George F.

Object Type: Article

System: The UNT Digital Library

(open access)

A = 4 0/sup +/ - 1/sup +/ binding-energy difference

The A = 4 ..lambda..-hypernuclei provide a rich source of information about the s-wave properties of the fundamental hyperon-nucleon (YN) force as well as offer a unique opportunity to investigate the complications that arise in calculations of the properties of bound systems in which one baryon (here the ..lambda..) with a given isospin couples strongly to another (the ..sigma..) with a different isospin. The ..lambda../sup 4/H - ..lambda../sup 4/He isodoublet ground-state energies are not consistent with a charge symmetry hypothesis for the YN interaction. The (spin-flip) excitation energies are quite sensitive to the ..lambda..N - ..sigma..N coupling of the YN interaction. In particular, when one represents the free YN interaction in terms of one-channel effective ..lambda..N potentials, the resulting 0/sup +/ (ground) state and 1/sup +/ (excited) spin-flip state are inversely ordered in terms of binding energies, the 1/sup +/ state being more bound. It is the ..sigma.. suppression that results from the reduced strength of the ..lambda..N - ..sigma..N off-diagonal coupling potential when the trinucleon core is restricted to isospin-1/2 which we study here. We find this spin-isospin suppression of the ..lambda..-..sigma.. conversion, which is due to the composite nature of the nuclear cores of the ..lambda../sup 4/H and …

Date: January 1, 1982

Creator: Gibson, B. F. & Lehman, D. R.

Object Type: Article

System: The UNT Digital Library

(open access)

4. pi. physics with the plastic ball

4 ..pi.. data taken with the Plastic Ball show that cluster production in relativistic nuclear collisions depends on both the size of the participant volume and the finite size of the cluster. The measurement of the degree of thermalization and the search for collective flow will permit the study of the applicability of macroscopic concepts such as temperature and density.

Date: October 1, 1982

Creator: Gutbrod, H. H.; Loehner, H.; Poskanzer, A. M.; Renner, T.; Riedesel, H.; Ritter, H. G. et al.

Object Type: Article

System: The UNT Digital Library

[21.06 Bar Flyer]

Flyer from the Dallas Gay Alliance announcing a two-for-one special at a bar in celebration of the 1982 court ruling of the 21.06 law as unconstitutional.

Date: 1982

Creator: Dallas Gay Alliance

Object Type: Poster

System: The UNT Digital Library

[21.06 Trial]

Photograph of Jim Barber (left), Don Baker (middle) and Bill Nelson (right) seated behind a table during the 21.06 trial in 1982. Unidentified persons are visible from the back, in the foreground.

Date: 1982

Creator: unknown

Object Type: Photograph

System: The UNT Digital Library

(open access)

216-S-1 and S-2 mixed-fission-product crib-characterization study

The 216-S-1 and 2 crib is an underground structure that was used for the disposal of radioactively contaminated liquid waste at the Hanford Site. The crib received acidic, intermediate level, mixed fission-product waste solutions from 1952 to 1956. The 1980 status of radioactive contaminants in the sediment beneath the crib was investigated. The results indicate that the radionuclide distributions are stable, with no evidence of significant translocations found since the late 1960's.

Date: March 1, 1982

Creator: Van Luik, A. E. & Smith, R. M.

Object Type: Report

System: The UNT Digital Library

[#610 Train Engine and Car]

Photograph of the side of a train engine and connected car, parked inside a building. Part of the front of the engine is visible, with the number "610." Handwritten text below the image says, "T&P #610 at 610 Historical Foundations [sic] new facilities in Fort Worth, Texas Apr 24th 1982."

Date: April 24, 1982

Creator: Watson, Don

Object Type: Photograph

System: The Portal to Texas History

[#610 Train Engine and Tender]

Photograph of the side of a train engine and connected tender, parked inside a building. Some equipment is partially visible on the left side of the photo. Handwritten text below the image says, "T&P #610 at 610 Historical Foundations [sic] new facilities in Fort Worth, Texas Apr 24th 1982."

Date: April 24, 1982

Creator: Watson, Don

Object Type: Photograph

System: The Portal to Texas History

[The 777 Main Street skyscraper in Fort Worth]

Photograph of the 777 Main Street skyscraper in Fort Worth at the corner of E 7th and Main. The glass building has multiple levels with an uneven roof line. Each section of the building, going away from the corner facing the camera gets higher and wider, creating a pyramid effect. It reflects the buildings that are across the street, ad a stoplight sits on the corner of the sidewalk in front of it.

Date: 1982

Creator: Williams, Byrd M. (Byrd Moore), IV, 1951-

Object Type: Photograph

System: The UNT Digital Library