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OTEC cold water pipe design for problems caused by vortex-excited oscillations

Description: Vortex-excited oscillations of marine structures result in reduced fatigue life, large hydrodynamic forces and induced stresses, and sometimes lead to structural damage and to diestructive failures. The cold water pipe of an OTEC plant is nominally a bluff, flexible cylinder with a large aspect ratio (L/D = length/diameter), and is likely to be susceptible to resonant vortex-excited oscillations. The objective of this report is to survey recent results pertaining to the vortex-excited oscillati… more
Date: March 14, 1980
Creator: Griffin, O. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Imaging of InGaN inhomogeneities using visible aperturelessnear-field scanning optical microscope

Description: The optical properties of epitaxially grown islands of InGaN are investigated with nanometer-scale spatial resolution using visible apertureless near-field scanning optical microscopy. Scattered light from the tip-sample system is modulated by cantilever oscillations and detected at the third harmonic of the oscillation frequency to distinguish the near-field signal from unwanted scattered background light. Scattered near-field measurements indicate that the as-grown InGaN islanded film may exh… more
Date: June 14, 2007
Creator: Stebounova, Larissa V.; Romanyuk, Yaroslav E.; Chen, Dongxue & Leone, Stephen R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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X-ray Thomson Scattering from Dense Plasmas

Description: Advances in the development of laser-produced x-ray sources have enabled a new class of high-energy density physics experiments. Powerful narrow-bandwidth x rays penetrate through short-lived hot dense states of matter and probe the physical properties with spectrally resolved x-ray scattering. Experiments from isochorically-heated plasmas with electron densities in the range of solid density and above have been demonstrated allowing for the first time exploration of the microscopic properties … more
Date: May 14, 2007
Creator: Glenzer, S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Linear nonradial pulsation theory. Lecture 7

Description: Many of the upper main-sequence stars pulsate in spheroidal nonradial modes. We know this to be true in numerous cases, as we have tabulated for the ..beta.. Cephei and delta Scuti variables in previous lectures. However, we cannot identify the actual mode for any star except for the low-order pressure p and f modes of our sun. It remains a great challenge to clearly state what really is occurring, in the process we learn more about how stars evolve and pulsate.
Date: March 14, 1983
Creator: Cox, A. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Oscillating liquid flow ICF Reactor

Description: Oscillating liquid flow in a falling molten salt inertial confinement fusion reactor is predicted to rapidly clear driver beam paths of residual liquid droplets. Oscillating flow will also provide adequate neutron and x-ray protection for the reactor structure with a short (2-m) fall distance permitting an 8 Hz repetition rate. A reactor chamber configuration is presented with specific features to clear the entire heavy-ion beam path of splashed molten salt. The structural components, including… more
Date: December 14, 1990
Creator: Petzoldt, R.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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How Many Muons Do We Need to Store in a Ring For Neutrino Cross-Section Measurements?

Description: Analytical estimate of the number of muons that must decay in the straight section of a storage ring to produce a neutrino & anti-neutrino beam of sufficient intensity to facilitate cross-section measurements with a statistical precision of 1%. As we move into the era of precision long-baseline {nu}{sub {mu}} {yields} {nu}{sub e} and {bar {nu}}{sub {mu}} {yields} {bar {nu}}{sub e} measurements there is a growing need to precisely determine the {nu}{sub e} and {bar {nu}}{sub e} cross-sections in… more
Date: July 14, 2011
Creator: Geer, Steve
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Observation of Beam ION Instability in Spear3

Description: Weak vertical coupled bunch instability with oscillation amplitude at {mu}m level has been observed in SPEAR3. The instability becomes stronger when there is a vacuum pressure rise by partially turning off vacuum pumps and it becomes weaker when the vertical beam emittance is increased by turning off the skew quadrupole magnets. These confirmed that the instability was driven by ions in the vacuum. The threshold of the beam ion instability when running with a single bunch train is just under 20… more
Date: December 14, 2011
Creator: Teytelman, D.; Cai, Y.; Corbett, W. J.; Raubenheimer, T. O.; Safranek, J. A.; Schmerge, J. F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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De Haas-van Alphen oscillations in the charge-density wave compound lanthanum tritelluride (LaTe3)

Description: De Haas-van Alphen oscillations were measured in lanthanum tritelluride (LaTe{sub 3}) to probe the partially gapped Fermi surface resulting from charge density wave (CDW) formation. Three distinct frequencies were observed, one of which can be correlated with a FS sheet that is unaltered by CDW formation. The other two frequencies arise from FS sheets that have been reconstructed in the CDW state.
Date: December 14, 2009
Creator: Ru, N.; Borzi, R. A.; Rost, A.; Mackenzie, A. P.; Laverock, J.; Dugdale, S. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Magnetic Recorder for Nuclear Pulse Application. Period Covered: October 6, 1959 to December 5, 1959

Description: Data on analog magnetic tape charactcristics are presented along with results from conventional and modulator playback system operational tests. Theoretical considerations imply that the modulator head should be loss sensitive to short term variations in record and playback tape speed. It is also pointed out that although a tape recorder operating at 7.5 in./sec has only 12 kcs bandwidth for sinusoidal wave forms. the record and play-back amplifiers for pulse recording can operate with other ba… more
Date: December 14, 1959
Creator: Burgwald, G. M. & Norton, R. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Time Dependent B{sub s}{sup 0}-{bar B}{sub s}{sup 0} Mixing Using Inclusive and Semileptonic B Decays at SLD

Description: We set a preliminary 95% C.L. exclusion on the oscillation frequency of B{sub s}{sup 0}-{bar B}{sub s}{sup 0} mixing using a sample of 350,000 hadronic Z{sup 0} decays collected by the SLD experiment at the SLC during the 1997-98 run. The analyses determine the b-hadron flavor at production by exploiting the large forward-backward asymmetry of polarized Z{sup 0} {yields} b{bar b} decays as well as information from the hemisphere opposite that of the reconstructed B decay. In one analysis, B dec… more
Date: September 14, 1999
Creator: Willocq, Stephane
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MODE IDENTIFICATION IN THE IRIS-LOADED WAVEGUIDE OF A RF PARTICLE SEPARATOR

Description: A description is presented concerning model measurements which were necessary to determine the geometry of brazed or electroformed prototypes for deflecting waveguides. A systematic investigation was also made of other than deflecting modes to ensure nondegenerate field solutions at selected operating frequencies. (J.R.D.)
Date: January 14, 1963
Creator: Hahn, H. & Halama, H.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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DUSEL Theory White Paper

Description: The scientific case for a Deep Underground Science and Engineering Laboratory [DUSEL] located at the Homestake mine in Lead, South Dakota is exceptional. The site of this future laboratory already claims a discovery for the detection of solar neutrinos, leading to a Nobel Prize for Ray Davis. Moreover this work provided the first step to our present understanding of solar neutrino oscillations and a chink in the armor of the Standard Model of particle physics. We now know, from several experime… more
Date: November 14, 2011
Creator: Raby, S.; U., /Ohio State; Walker, T.; /Ohio State U. /Ohio State U., Dept. Astron. /Ohio State U., CCAPP; Babu, K. S.; U., /Oklahoma State et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda,and w from the First Year Data Set

Description: We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color light-curves measured using the MegaPrime/MegaCam instrument at the Canada-France-Hawaii Telescope (CFHT), by repeatedly imaging four one-square degree fields in four bands. Follow-up spectroscopy was performed at the VLT, Gemini and Keck telescopes to confirm the nature of the supernovae and to me… more
Date: October 14, 2005
Creator: Astier, P.; Guy, J.; Regnault, N.; Pain, R.; Aubourg, E.; Balam, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Latest Results from the LSND Experiment

Description: The LSND experiment at Los Alamos has searched for anti-{nu}{sub {mu}} {r_arrow} anti-{nu}{sub e} oscillations using anti-{nu}{sub {mu}} from {mu}{sup +} decay at rest and {nu}{sub {mu}} {r_arrow} {nu}{sub e} oscillations using {nu}{sub {mu}} from {pi}{sup +} decay in flight. An excess of events attributable to neutrino oscillations has been observed in both of these channels in data collected in 1993-1995. A recent preliminary analysis of the decay at rest anti-{nu}{sub {mu}} {r_arrow} anti-{n… more
Date: February 14, 1999
Creator: Tayloe, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pressure fluctuations as a diagnostic tool for fluidized beds. Technical progress report, April 1--June 30, 1995

Description: The first phase of experimentation for the comprehensive similitude study on the two laboratory scale cold-model circulating fluidized beds has been completed. This first phase required the acquisition and analysis of pressure fluctuation data from a 2.0 inch diameter pressurized circulating fluidized bed. The second phase required the matching of each of the 20 experiments in a cold-model twice the size of the smaller 2.0 inch circulating fluidized bed model using similitude relations. Problem… more
Date: July 14, 1995
Creator: Brown, R.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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