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253,348 Matching Results

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Results: 1 - 24 of 253,348 next
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
A 0. 4 mm Interferometer System Using Dielectric Waveguide (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
0. 9 a Gev /sup 238/U on /sup 238/U collisions in the LBL streamer chamber. Appendix A (open access)

0. 9 a Gev /sup 238/U on /sup 238/U collisions in the LBL streamer chamber. Appendix A

Charged particle exclusive data for high multiplicity U on U events are reported. Analyses are based on comparison with Cugnon's intranuclear cascade model, and the explosion-evaporation simulation of Fai and Randrup. The azimuthal structure of the observed events shows evidence of collective flow. The widely used flow angle methodology proves to be relatively insensitive to collective effects under the conditions of the present experiment. An isotropic pattern of ejectile emission is not reached at maximum multiplicity. 18 refs., 4 figs.
Date: January 1, 1984
Creator: Fung, S.Y.; Beavis, D.; Gorn, W.; Keane, D.; Liu, Y.M.; Poe, R.T. et al.
Object Type: Article
System: The UNT Digital Library
T = 0 and T = 1 Pairing in Light Nuclei. (open access)

T = 0 and T = 1 Pairing in Light Nuclei.

None
Date: January 1, 1969
Creator: Goodman, A. L.
Object Type: Thesis or Dissertation
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 (open access)

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
0/sup -/ to 0/sup +/ beta decay in A = 16 (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
[1 1/2 Story Stuccoed Building]

[1 1/2 Story Stuccoed Building]

Photograph of the 1 1/2 Story Stuccoed Building in Rio Grande City, Texas.
Date: January 1980
Creator: Hardy, Daniel
Object Type: Photograph
System: The Portal to Texas History
[1 1/2 Story, (With arched-crenelated pediment)]

[1 1/2 Story, (With arched-crenelated pediment)]

Photograph of the 1 1/2 Story (located at 2nd Street) in Rio Grande City, Texas.
Date: January 1980
Creator: Hardy, Daniel
Object Type: Photograph
System: The Portal to Texas History
[1/2 HP Maytag Restoration] (open access)

[1/2 HP Maytag Restoration]

Article by Pettinger, Wesley E. about 1/2 HP Maytag Engine Restoration.
Date: January 13, 1997
Creator: Pettinger, Wesley E.
Object Type: Article
System: The UNT Digital Library
A 1. 5--4 Kelvin detachable cold-sample transfer system: Application to inertially confined fusion with spin-polarized hydrogens fuels (open access)

A 1. 5--4 Kelvin detachable cold-sample transfer system: Application to inertially confined fusion with spin-polarized hydrogens fuels

A compact cold-transfer apparatus for engaging and retrieving samples at liquid helium temperatures (1.5--4K), maintaining the samples at such temperatures for periods of hours, and subsequently inserting them in diverse apparatuses followed by disengagement, is described. The properties of several thermal radiation-insulating shrouds, necessary for very low sample temperatures, are presented. The immediate intended application is transportable target-shells containing highly spin-polarized deuterons in solid HD or D{sub 2} for inertially confined fusion (ICF) experiments. The system is also valuable for unpolarized high-density fusion fuels, as well as for other applications which are discussed. 9 refs., 6 figs.
Date: January 1, 1990
Creator: Alexander, N.; Barden, J.; Fan, Q. & Honig, A.
Object Type: Report
System: The UNT Digital Library
1. 5 GeV/c multiturn shaving extraction and its transport line for the Brookhaven AGS (open access)

1. 5 GeV/c multiturn shaving extraction and its transport line for the Brookhaven AGS

A system for fast shaving extraction at 1.5 GeV/c is implemented to extract the circulating beam in five turns. A numerical simulation is first carried out to determine the emittance and the rf structure of the extracted beam. This is followed by several machine study sessions which establish the optimal extraction configuration, confirm the emittance, and modify the transport line for low energy beam. Finally, a one-week run for the Neutrino Oscillation experiment demonstrates that the system is very stable and capable of delivering 7.5 x 10/sup 12/ p/sec with 70% extraction efficiency and 95% transport efficiency.
Date: January 1, 1979
Creator: Weng, W. T.; Blumberg, L. N.; Gill, E.; Soukas, A.; Witkover, R. L.; Egleman, E. et al.
Object Type: Article
System: The UNT Digital Library
1.5" Nolan Blow-Off Valve [Boiler, Boiler Room]

1.5" Nolan Blow-Off Valve [Boiler, Boiler Room]

Blueprint depicting technical details of Battleship Texas.
Date: January 26, 1926
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1/12-scale physical modeling experiments in support of tank 241-SY- 101 hydrogen mitigation (open access)

1/12-scale physical modeling experiments in support of tank 241-SY- 101 hydrogen mitigation

Hanford tank 241-SY-101 is a 75-ft-dia double-shell tank that contains approximately 1.1 M gal of radioactive fuel reprocessing waste. Core samples have shown that the tank contents are separated into two main layers, a article laden supernatant liquid at the top of the tank and a more dense slurry on the bottom. Two additional layers may be present, one being a potentially thick sludge lying beneath the slurry at the bottom of the tank and the other being the crust that has formed on the surface of the supernatant liquid. The supernatant is more commonly referred to as the convective layer and the slurry as the non-convective layer. Accumulation of gas (partly hydrogen) in the non-convective layer is suspected to be the key mechanism behind the gas burp phenomena, and several mitigation schemes are being developed to encourage a more uniform gas release rate (Benegas 1992). To support the full-scale hydraulic mitigation test, scaled experiments were performed to satisfy two objectives: 1. provide an experimental database for numerical- model validation; 2. establish operating parameter values required to mobilize the settled solids and maintain the solids in suspension.
Date: January 1, 1993
Creator: Fort, J. A.; Bamberger, J. A.; Bates, J. M.; Enderlin, C. W. & Elmore, M. R.
Object Type: Report
System: The UNT Digital Library
1/12-scale physical modeling experiments in support of tank 241-SY- 101 hydrogen mitigation. Final report (open access)

1/12-scale physical modeling experiments in support of tank 241-SY- 101 hydrogen mitigation. Final report

Hanford tank 241-SY-101 is a 75-ft-dia double-shell tank that contains approximately 1.1 M gal of radioactive fuel reprocessing waste. Core samples have shown that the tank contents are separated into two main layers, a article laden supernatant liquid at the top of the tank and a more dense slurry on the bottom. Two additional layers may be present, one being a potentially thick sludge lying beneath the slurry at the bottom of the tank and the other being the crust that has formed on the surface of the supernatant liquid. The supernatant is more commonly referred to as the convective layer and the slurry as the non-convective layer. Accumulation of gas (partly hydrogen) in the non-convective layer is suspected to be the key mechanism behind the gas burp phenomena, and several mitigation schemes are being developed to encourage a more uniform gas release rate (Benegas 1992). To support the full-scale hydraulic mitigation test, scaled experiments were performed to satisfy two objectives: 1. provide an experimental database for numerical- model validation; 2. establish operating parameter values required to mobilize the settled solids and maintain the solids in suspension.
Date: January 1993
Creator: Fort, J. A.; Bamberger, J. A.; Bates, J. M.; Enderlin, C. W. & Elmore, M. R.
Object Type: Report
System: The UNT Digital Library
1.5D Quasilinear Model for Alpha Particle-TAE Interaction in ARIES ACT-I (open access)

1.5D Quasilinear Model for Alpha Particle-TAE Interaction in ARIES ACT-I

We study the TAE interaction with alpha particle fusion products in ARIES ACT-I using the 1.5D quasilinear model. 1.5D uses linear analytic expressions for growth and damping rates of TAE modes evaluated using TRANSP pro les to calculates the relaxation of pressure pro les. NOVA- K simulations are conducted to validate the analytic dependancies of the rates, and to normalize their absolute value. The low dimensionality of the model permits calculating loss diagrams in large parameter spaces.
Date: January 30, 2013
Creator: Ghantous, K.; Gorelenkov, N. N.; Kessel, C. & Poli, F.
Object Type: Report
System: The UNT Digital Library
1" Composition & Cast Steel Swing Check Valve High Pressure Standard Pressure 101 - 300 Lbs.

1" Composition & Cast Steel Swing Check Valve High Pressure Standard Pressure 101 - 300 Lbs.

Blueprint depicting technical details of Battleship Texas.
Date: January 16, 1926
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1-D closure models for slender 3-D viscoelastic free jets: von Karman flow geometry and elliptical cross section (open access)

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
1-D hybrid code for FRM start-up (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
A 1-D model for highly sensitive tubular reactors (open access)

A 1-D model for highly sensitive tubular reactors

We consider the steady state operation of wall-cooled, fixed-bed tubular reactors. In these reactors the temperature rise ..delta..T must normally be limited to small fractions of the adiabatic temperature rise ..delta..T/sub ad/, both to avoid runaway and maintain product selectivity. Yet ..delta..T/..delta..T/sub ad/ << 1 can only occur if eta = t/sub dif//t/sub reac/ << 1, where t/sub dif/ is the timescale on which heat escapes the reactor by ''diffusing'' to the cooled walls, and t/sub reac/ is the timescale over which the reaction occurs. So here we use asymptotic methods based on eta << 1 to analyze the 2-d reactor equations, and find the radial concentration and temperature profiles to leading order in eta. We then obtain a 1-d model of the reactor by substituting these asymptotically correct profiles into the reactor equations and averaging over r. This model, the ..cap alpha..-model, is identical to the standard (Beek and Singer) 1-d model, except that the reactor's overall heat transfer coefficient U is a decreasing function of the temperature rise ..delta..T. This occurs because as ..delta..T increases, the reaction becomes increasingly concentrated near r = 0, causing a decreased heat transfer efficiency through the reactor's walls. By comparing it with …
Date: January 1, 1987
Creator: Hagan, P. S.; Herskowitz, M. & Pirkle, J. C.
Object Type: Article
System: The UNT Digital Library
1 - FFTF-LMFBR seal test program, July-September 1974 (open access)

1 - FFTF-LMFBR seal test program, July-September 1974

The objectives of the general seal test program are to: (1) conduct static and dynamic tests to demonstrate or determine the mechanical performance of full-size (cross-section) FFTF fuel transfer machine and reactor vessel head seals intended for use in a sodium vapor - inert gas environment, (2) demonstrate that these FFTF seals or new seal configurations provide acceptable fission product and cover gas retention capabilities at Clinch River Breeder Reactor Plant (CRBRP) operating environmental conditions other than radiation, (3) develop improved seals and seal technology for the CRBRP to support the national objective to reduce all atmospheric contaminations to low levels, and (4) publish a Design Guide for reactor seals along with Ordering Data. Test results for the quarter are presented.
Date: January 1, 1974
Creator: Kurzeka, W. & Oliva, R.
Object Type: Report
System: The UNT Digital Library
S-1 project. Volume I. Architecture. 1979 annual report (open access)

S-1 project. Volume I. Architecture. 1979 annual report

The US Navy is one of the world's largest users of digital computing equipment having a procurement cost of at least $50,000, and is the single largest such computer customer in the Department of Defense. Its projected acquisition plan for embedded computer systems during the first half of the 80s contemplates the installation of over 10,000 such systems at an estimated cost of several billions of dollars. This expenditure, though large, is dwarfed by the 85 billion dollars which DOD is projected to spend during the next half-decade on computer software, the near-majority of which will be spent by the Navy; the life-cycle costs of the 700,000+ lines of software for a single large Navy weapons systems application (e.g., AEGIS) have been conservatively estimated at most of a billion dollars. The S-1 Project is dedicated to realizing potentially large improvements in the efficiency with which such very large sums may be spent, so that greater military effectiveness may be secured earlier, and with smaller expenditures. The fundamental objectives of the S-1 Project's work are first to enable the Navy to be able to quickly, reliably and inexpensively evaluate at any time what is available from the state-of-the-art in digital processing …
Date: January 1, 1979
Creator: unknown
Object Type: Report
System: The UNT Digital Library
S-1 project. Volume II. Hardware. 1979 annual report (open access)

S-1 project. Volume II. Hardware. 1979 annual report

This volume includes highlights of the design of the Mark IIA uniprocessor (SMI-2), and the SCALD II user's manual. SCALD (structured computer-aided logic design system) cuts the cost and time required to design logic by letting the logic designer express ideas as naturally as possible, and by eliminating as many errors as possible - through consistency checking, simulation, and timing verification - before the hardware is built. (GHT)
Date: January 1, 1979
Creator: unknown
Object Type: Report
System: The UNT Digital Library
1-/sup 11/C-D-glucose and related compounds (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
1 to 12 GeV/c beam transport for transverse or longitudinally polarized protons (open access)

1 to 12 GeV/c beam transport for transverse or longitudinally polarized protons

A two-stage beam transport for polarized protons has been constructed and operated at the Argonne ZGS. The first stage delivers vertically polarized protons (N-type) to an elastic scattering polarimeter consisting of a 10 cm long LH/sub 2/ target and two moveable sets of forward and recoil scintillation counters. The unscattered protons transported through the beam's second stage are focused onto the polarized proton target PPT-III; this target utilizes a 2.5 T R and A magnet to produce target polarizations in the horizontal plane, either in the beam direction (L-type) or transverse to it (S-type). The second stage of the beam is equipped with a combination of superconducting solenoids and dipole magnets; thus the beam polarization can also be rotated to point in the L or S direction. The entire system has been operated successfully over the momentum range 1.0 to 11.75 GeV/c with NS, LS, SS, and LL beam target spin directions.
Date: January 1, 1979
Creator: Colton, E. P.
Object Type: Article
System: The UNT Digital Library
2.5" heavy pressure valve cast steel

2.5" heavy pressure valve cast steel

Blueprint depicting technical details of Battleship Texas.
Date: January 15, 1914
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History