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214,341 Matching Results

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Results: 1 - 24 of 214,341 next
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
$D^0 \bar{D}^0$ Mixing at BaBar (open access)

$D^0 \bar{D}^0$ Mixing at BaBar

This article reviews the recent measurement of D{sup 0}-{bar D}{sup 0} mixing with the D{sup 0} {yields} K{pi} decay channel from the BABAR experiment at the PEP-II B-Factory. Averages from the Heavy Flavor Averaging Group between this result and a previous result from BELLE are also presented.
Date: October 26, 2011
Creator: Coleman, Jonathon
Object Type: Article
System: The UNT Digital Library
1-2 GeV synchrotron radiation facility at Lawrence Berkeley Laboratory (open access)

1-2 GeV synchrotron radiation facility at Lawrence Berkeley Laboratory

The Advanced Light Source (ALS), a dedicated synchrotron radiation facility optimized to generate soft x-ray and vacuum ultraviole (XUV) light using magnetic insertion devices, was proposed by the Lawrence Berkeley Laboratory in 1982. It consists of a 1.3-GeV injection system, an electron storage ring optimized at 1.3 GeV (with the capability of 1.9-GeV operation), and a number of photon beamlines emanating from twelve 6-meter-long straight sections, as shown in Fig. 1. In addition, 24 bending-magnet ports will be avialable for development. The ALS was conceived as a research tool whose range and power would stimulate fundamentally new research in fields from biology to materials science (1-4). The conceptual design and associated cost estimate for the ALS have been completed and reviewed by the US Department of Energy (DOE), but preliminary design activities have not yet begun. The focus in this paper is on the history of the ALS as an example of how a technical construction project was conceived, designed, proposed, and validated within the framwork of a national laboratory funded largely by the DOE.
Date: October 1, 1985
Creator: Berkner, K.H.
Object Type: Article
System: The UNT Digital Library
1,4-diphenylbutadiyne as a potential tritium getter (open access)

1,4-diphenylbutadiyne as a potential tritium getter

Research on the acetylene compound 1,4-diphenylbutadiyne is an effort to develop an air-operative tritium gas scavenger. T/sub 2/ adds to the acetylene bond of the organic in the presence of a metal catalyst. The catalyst also stimulates the oxidation reaction as well. The butadiyne compound has shown good reaction efficiency at 300 ppM T/sub 2/ in static dry air. At this concentration 75% of the scavenged tritium was in the organic. This work has expanded to the investigation of liquid acetylenes, metal acetylene complexes, organometallics and acetylene based alcohols. The best of these compounds has gettered 100% of 10 to 500 ppM T/sub 2/ for both static and dynamic air flow conditions.
Date: October 1, 1980
Creator: Miller, H. H.; Bissell, E. E.; Tsugawa, R. T. & Souers, P. C.
Object Type: Article
System: The UNT Digital Library
1.5" IPS (2" Bore) Master High Pressure Quick Closing Gate Valve Fuel Oil System

1.5" IPS (2" Bore) Master High Pressure Quick Closing Gate Valve Fuel Oil System

Blueprint depicting technical details of Battleship Texas.
Date: October 23, 1936
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
A 1.5 Mwe Thermionic Reactor Space Power System (open access)

A 1.5 Mwe Thermionic Reactor Space Power System

None
Date: October 31, 1966
Creator: Smith, C. K. & Parkinson, R. Y.
Object Type: Report
System: The UNT Digital Library
1.8.2.1.2 Site system engineering implementation Fiscal Year 1998 multi-year work plan (open access)

1.8.2.1.2 Site system engineering implementation Fiscal Year 1998 multi-year work plan

Manage the Site Systems Engineering process to provide a traceable, integrated, requirements-driven, and technically defensible baseline., Through the Site Integration Group, Systems Engineering ensures integration of technical activities across all site projects. Systems Engineering`s primary interfaces are with the Project Direction Office and with the projects, as well as with the Planning organization.
Date: October 3, 1997
Creator: Ferguson, J. E.
Object Type: Report
System: The UNT Digital Library
1/12-Scale mixing interface visualization and buoyant particle release tests in support of Tank 241-SY-101 hydrogen mitigation (open access)

1/12-Scale mixing interface visualization and buoyant particle release tests in support of Tank 241-SY-101 hydrogen mitigation

In support of tank waste safety programs, visualization tests were performed in the 1/12-scale tank facility, using a low-viscosity simulant. The primary objective of the tests was to obtain video records of the transient jet-sludge interaction. The intent is that these videos will provide useful qualitative data for comparison with model predictions. Two tests were initially planned: mixing interface visualization (MIV) and buoyant particle release (BPR). Completion of the buoyant particle release test was set aside in order to complete additional MIV tests. Rheological measurements were made on simulant samples before testing, and the simulant was found to exhibit thixotropic behavior. Shear vane measurements were also made on an in-situ analog of the 1/12-scale tank simulant. Simulant shear strength has been observed to be time dependent. The primary objective of obtaining video records of jet-sludge interaction was satisfied, and the records yielded jet location information which may be of use in completing model comparisons. The modeling effort is not part of this task, but this report also discusses test specific instrumentation, visualization techniques, and shear vane instrumentation which would enable improved characterization of jet-sludge interaction and simulant characteristics.
Date: October 1, 1993
Creator: Eschbach, E. J. & Enderlin, C. W.
Object Type: Report
System: The UNT Digital Library
1/12-Scale scoping experiments to characterize double-shell tank slurry uniformity: Test plan (open access)

1/12-Scale scoping experiments to characterize double-shell tank slurry uniformity: Test plan

Million gallon double-shell tanks (DSTs) at Hanford are used to store transuranic, high-level, and low-level wastes. These wastes generally consist of a large volume of salt-laden solution covering a smaller volume of settled sludge primarily containing metal hydroxides. These wastes will be retrieved and processed into immobile waste forms suitable for permanent disposal. The current retrieval concept is to use submerged dual-nozzle pumps to mobilize the settled solids by creating jets of fluid that are directed at the tank solids. The pumps oscillate, creating arcs of high-velocity fluid jets that sweep the floor of the tank. After the solids are mobilized, the pumps will continue to operate at a reduced flow rate sufficient to maintain the particles in a uniform suspension. The objectives of these 1/12-scale scoping experiments are to determine how Reynolds number, Froude number, and gravitational settling parameter affect the degree of uniformity achieved during jet mixer pump operation in the full-scale double-shell tanks; develop linear models to predict the degree of uniformity achieved by jet mixer pumps operating in the full-scale double-shell tanks; apply linear models to predict the degree of uniformity that will be achieved in tank 241-AZ-101 and determine whether contents of that tank will …
Date: October 1994
Creator: Bamberger, J. A. & Liljegren, L. M.
Object Type: Report
System: The UNT Digital Library
1" Macomb Strainer for Oil Pump

1" Macomb Strainer for Oil Pump

Blueprint depicting technical details of Battleship Texas.
Date: October 24, 1913
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1. Mono((8)annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes (open access)

1. Mono((8)annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes

A reproducible, high-yield synthesis of mono((8)annulene)uranium(4)dichloride (1) is reported, along with the X-ray crystal structural of the bis(pyridine) adduct. Metathesis reactions of the half-sandwich complex 1 with a variety of simple alkyl and alkoxy reagents failed to generate any isolable mono-ring complexes. Reactions of 1 with polydentate, delocalized anions did produce stable derivatives, including mono((8)annulene)uranium(4)bis(acetylacetonate) (4). An X-ray crystal structure of 4 is reported.
Date: October 1, 1991
Creator: Boussie, T. R.
Object Type: Report
System: The UNT Digital Library
1. Mono([8]annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes (open access)

1. Mono([8]annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes

A reproducible, high-yield synthesis of mono([8]annulene)uranium(4)dichloride (1) is reported, along with the X-ray crystal structural of the bis(pyridine) adduct. Metathesis reactions of the half-sandwich complex 1 with a variety of simple alkyl and alkoxy reagents failed to generate any isolable mono-ring complexes. Reactions of 1 with polydentate, delocalized anions did produce stable derivatives, including mono([8]annulene)uranium(4)bis(acetylacetonate) (4). An X-ray crystal structure of 4 is reported.
Date: October 1, 1991
Creator: Boussie, T. R.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
1" Standard High Pressure Valve Cast Steel Pressure 0 - 300 Lbs.

1" Standard High Pressure Valve Cast Steel Pressure 0 - 300 Lbs.

Blueprint depicting technical details of Battleship Texas.
Date: October 12, 1923
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
2.0 K CEBAF Cryogenics (open access)

2.0 K CEBAF Cryogenics

None
Date: October 1, 1988
Creator: Arenius, Dana; Chronis, William; Kashy, David; Keesee, Marie & Rode, Claus
Object Type: Article
System: The UNT Digital Library
2 + 1 dimensional quantum gravity and the braid group (open access)

2 + 1 dimensional quantum gravity and the braid group

This paper discusses the following on quantum gravity: 2 + 1 gravity as a Chern-Simons theory; quantization; dynamics; the Braid group; and the emergence of space and time. 16 refs., 3 figs. (LSP)
Date: October 1, 1989
Creator: Carlip, S.
Object Type: Article
System: The UNT Digital Library
The 2.6 Angstrom resolution structure of Rhodobacter capsulatus bacterioferritin with metal-free dinuclear site and heme iron in a crystallographic 'special position' (open access)

The 2.6 Angstrom resolution structure of Rhodobacter capsulatus bacterioferritin with metal-free dinuclear site and heme iron in a crystallographic 'special position'

None
Date: October 31, 2001
Creator: Cobessi, D.; Huang, L.-S.; Ban, M.; Pon, N. G.; Daldal, F. & Berry, E. A.
Object Type: Article
System: The UNT Digital Library
2-D emittance equation with acceleration and compression (open access)

2-D emittance equation with acceleration and compression

Since both acceleration and compression are required for an Inertial Fusion Driver, the understanding of their effect on the beam quality, emittance, is important. This report attempts to generalize the usual emittance formula for the drifting beam to include these effects. The derivation of the 2-D emittance equation is carried out and a comparison with the particle code results is given. The 2-D emittance at a given axial location is reasonable to consider for a long beam, particularly with velocity tilt; transverse emittance averaged over the entire bunch is not a useful quantity. 6 refs., 2 figs., 1 tab.
Date: October 1, 1988
Creator: Hahn, K. D. & Smith, L.
Object Type: Report
System: The UNT Digital Library
A 2-GHz Rectangular Corrugated Horn (open access)

A 2-GHz Rectangular Corrugated Horn

We have designed, constructed and tested a large, rectangular horn antenna with a center frequency of 2.0 GHz, corrugated on the E-plane walls, made out of aluminum sheet. A new technique has been developed to solder thin aluminum strips onto the back plane to form the corrugations. The radiation beam pattern shows half-power beamwidths of 12{sup 0} and 14{sup 0} in the H and E planes respectively, and side lobe response below -40 dB at angles greater than 50{sup 0} from horn axis. The measured return loss is less than -20 dB (VSWR < 1.22) between 1.7 and 2.3 GHz; insertion loss is less than 0.15 dB.
Date: October 1, 1991
Creator: Bersanelli, M.; Bensadoun, M.; De Amici, Giovanni; Limon, M.; Smoot, George F.; Tanaka, S. et al.
Object Type: Article
System: The UNT Digital Library
2-pi Photoproduction from CLAS and CB-ELSA - The Search for Missing Resonances (open access)

2-pi Photoproduction from CLAS and CB-ELSA - The Search for Missing Resonances

2-pi-photoproduction is one of the promising reactions to search for baryon resonances that have been predicted but have not yet been observed. The gamma-rho --> rho-pi{sup 0}-pi{sup 0}(CB-ELSA) and the gamma-rho --> rho-pi{sup +}-pi{sup -} (CLAS) data show interesting resonance structures. A partial wave analysis (PWA) has to be done to determine which baryon resonances contribute what their quantum numbers and their relative couplings to the different accessible rho-2-pi-channels and to the photon are. First preliminary PWA-results on the lowest energy rho-pi{sup 0}-pi{sup 0} data (sq rt s<1.8 GeV)look very promising. From an extension of this analysis to higher energies combining the rho-pi{sup 0}-pi{sup 0} and the rho-pi{sup +}-pi{sup -}-data, one can expect; interesting results on resonances decaying into Delta-pi, N-rho, N(pi-pi)s, N*-pi, and Delta*-pi.
Date: October 1, 2003
Creator: Thoma, Ulrike
Object Type: Article
System: The UNT Digital Library
2" Standard High Pressure Gate Valve Cast Steel 100 - 300 Lbs. Pressure

2" Standard High Pressure Gate Valve Cast Steel 100 - 300 Lbs. Pressure

Blueprint depicting technical details of Battleship Texas.
Date: October 27, 1925
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
2 x 2 TeV mu(superscript +) mu (superscript) collider (open access)

2 x 2 TeV mu(superscript +) mu (superscript) collider

The scenarios for high-luminosity 2 x 2 TeV and 250 x 250 GeV {mu}{sup +}{mu}{sup -} colliders are presented. Having a high physics potential, such a machine has specific physics and technical advantages and disadvantages when compared with an e{sup +}e{sup -} collider. Parameters for the candidate designs and the basic components - proton source, pion production and decay channel, cooling, acceleration and collider storage ring - are considered. Attention is paid to the areas mostly affecting the collider performance: targetry, energy spread, superconducting magnet survival, detector backgrounds, polarization, environmental issues. 13 refs., 9 figs., 4 tabs.
Date: October 1, 1996
Creator: Mokhov, N. V. & Noble, R. J.
Object Type: Article
System: The UNT Digital Library
3"/50 cal.AA battery control from MK.51 directors FC circuits "GH" &"3U" isometric wiring diag.

3"/50 cal.AA battery control from MK.51 directors FC circuits "GH" &"3U" isometric wiring diag.

Blueprint depicting technical details of Battleship Texas.
Date: October 5, 1944
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
3" 200GPM Evaporator Brine Circulating Pump

3" 200GPM Evaporator Brine Circulating Pump

Blueprint depicting technical details of Battleship Texas.
Date: October 18, 1926
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
3-D Micro-Scale Machining Implementation (open access)

3-D Micro-Scale Machining Implementation

The KCP investigated milling, turning, and wire EDMing features at a micro-scale using existing equipment to find the limitations and hindrances to producing future designs.
Date: October 20, 2008
Creator: Boucher, Christopher L.
Object Type: Report
System: The UNT Digital Library
3-D Microprobe Metrology (open access)

3-D Microprobe Metrology

This report documents the results of a project undertaken to develop an ultra-high-accuracy measurement capability, which is necessary to address a rising trend toward miniaturized mechanical products exhibiting dramatically reduced product tolerances. A significant improvement in measurement capability is therefore required to insure that a 4:1 ratio can be maintained between product tolerances and measurement uncertainty.
Date: October 14, 2008
Creator: Swallow, Kevin
Object Type: Report
System: The UNT Digital Library