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Ground motion modeling of Hayward fault scenario earthquakes II:Simulation of long-period and broadband ground motions

Description: We simulate long-period (T > 1.0-2.0 s) and broadband (T > 0.1 s) ground motions for 39 scenarios earthquakes (Mw 6.7-7.2) involving the Hayward, Calaveras, and Rodgers Creek faults. For rupture on the Hayward fault we consider the effects of creep on coseismic slip using two different approaches, both of which reduce the ground motions compared with neglecting the influence of creep. Nevertheless, the scenario earthquakes generate strong shaking throughout the San Francisco Bay area with… more
Date: November 4, 2009
Creator: Aagaard, B T; Graves, R W; Rodgers, A; Brocher, T M; Simpson, R W; Dreger, D et al.
Partner: UNT Libraries Government Documents Department
open access

Inductively Coupled Plasma and Electron Cyclotron Resonance Plasma Etching of InGaAlP Compound Semiconductor System

Description: Current and future generations of sophisticated compound semiconductor devices require the ability for submicron scale patterning. The situation is being complicated since some of the new devices are based on a wider diversity of materials to be etched. Conventional IUE (Reactive Ion Etching) has been prevalent across the industry so far, but has limitations for materials with high bond strengths or multiple elements. IrI this paper, we suggest high density plasmas such as ECR (Electron Cyclotr… more
Date: November 4, 1998
Creator: Abernathy, C.R.; Hobson, W.S.; Hong, J.; Lambers, E.S.; Pearton, S.J. & Shul, R.J.
Partner: UNT Libraries Government Documents Department
open access

Measurement of Neutron Total Cross Sections in Support of the APT Program

Description: The authors have completed a new set of total cross section measurements of 37 samples spanning the periodic table. The authors employed the same technique as in a previous measurement, with refinements intended to allow measurements on separated isotopes, and with improved systematic error control. The goal of the new measurement was 1% statistical accuracy in 1% energy bins with systematic errors less than 1%. This was achieved for all but the smallest samples, for which the statistical accur… more
Date: November 4, 1998
Creator: Abfalterer, W. P.; Haight, R. C.; Morgan, G. L.; Bateman, F. B.; Dietrich, F. S. & Finlay, R. W.
Partner: UNT Libraries Government Documents Department
open access

Minijet Deformation and Charge-independent Two-particleCorrelations on Momentum Subspace (eta,phi) In Au-Au Collisions atsqrt(sNN) = 130 GeV

Description: We present first measurements of charge-independent correlations on momentum-space difference variables {eta}{sub 1}-{eta}{sub 2} (pseudorapidity) and {phi}{sub 1}-{phi}{sub 2} (azimuth) for charged primary hadrons with transverse momentum within 0.15 {le} p{sub t} {le} 2 GeV/c and |{eta}| {le} 1.3 from Au-Au collisions at {radical}s{sub NN} = 130 GeV. We observe strong charge-independent correlations associated with minijets and elliptic flow. The width of the minijet peak on {eta}{sub 1}-{eta… more
Date: November 4, 2004
Creator: Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D.; Arkhipkin, D. et al.
Partner: UNT Libraries Government Documents Department
open access

Co-Ordinated Coscheduling in Clusters through a Generic Framework

Description: Communication-driven scheduling is known to be an effective technique to improve the performance of parallel workloads in time-sharing clusters. Although several such coscheduling algorithms have been proposed, to our knowledge, none of these techniques have been adopted in commercial systems. We believe this is primarily because many of these algorithms has not been exhaustively tested on real systems in presence of mixed workloads, and hence, have not been demonstrated as a favorable alternat… more
Date: November 4, 2002
Creator: Agarwarl, S; Choi, G S; Das, C; Yoo, A & Nagar, S
Partner: UNT Libraries Government Documents Department
open access

Study of Abnormal Vertical Emittance Growth in ATF Extraction Line

Description: Since several years, the vertical beam emittance measured in the Extraction Line (EXT) of the Accelerator Test Facility (ATF) at KEK, that will transport the electron beam from the ATF Damping Ring (DR) to the future ATF2 Final Focus beam line, is significantly larger than the emittance measured in the DR itself, and there are indications that it grows rapidly with increasing beam intensity. This longstanding problem has motivated studies of possible sources of this anomalous emittance growth. … more
Date: November 4, 2011
Creator: Alabau, M.; Faus-Golfe, A.; /Valencia U., IFIC; Alabau, M.; Bambade, P.; Brossard, J. et al.
Partner: UNT Libraries Government Documents Department
open access

Knowledge Representation and Subject Access in Electronic Theses and Dissertations: Analysis of Creators’ and Users’ Assumptions and Expectations

Description: This paper analyzes the relationship between subject terms -- both authorized terms from controlled vocabularies and free-text keywords -- used to succinctly describe the content of the electronic theses and dissertations (ETDs) and the search terms entered by users to discover and access the ETDs. Identification of search terms and comparison of search results with subject terms used in describing ETDs provides a basis for assessing the relative usefulness of controlled-vocabulary subject term… more
Date: 2015-11-04/2015-11-06
Creator: Alemneh, Daniel Gelaw; Zavalina, Oksana; Tarver, Hannah; Zavalin, Vyacheslav; Phillips, Mark Edward & Kizhakkethil, Priya
Partner: UNT Libraries
open access

Micromachine Wedge Stepping Motor

Description: A wedge stepping motor, which will index a mechanism, has been designed and fabricated in the surface rnicromachine SUMMiT process. This device has demonstrated the ability to index one gear tooth at a time with speeds up to 205 teeth/see. The wedge stepper motor has the following features, whi:h will be useful in a number of applications. o The ability to precisely position mechanical components. . Simple pulse signals can be used for operation. o Only 2 drive signals are requixed for operatio… more
Date: November 4, 1998
Creator: Allen, James J. & Schriner, Heather K.
Partner: UNT Libraries Government Documents Department
open access

Computational Design of High Efficiency Release Targets for Use at ISOL Facilities

Description: This report describes efforts made at the Oak Ridge National Laboratory to design high-efficiency-release targets that simultaneously incorporate the short diffusion lengths, high permeabilities, controllable temperatures, and heat removal properties required for the generation of useful radioactive ion beam (RIB) intensities for nuclear physics and astrophysics research using the isotope separation on-line (ISOL) technique. Short diffusion lengths are achieved either by using thin fibrous targ… more
Date: November 4, 1998
Creator: Alton, G. D.; Liu, Y. & Middleton, J. W.
Partner: UNT Libraries Government Documents Department
open access

Coordination of 1,4-Diazabutadiene Ligands to Decamethylytterbocene: Additional Examples of Spin Coupling in Ytterbocene Complexes

Description: The paramagnetic 1:1 coordination complexes of (C5Me5)2Yb with a series of diazabutadiene ligands, RN=C(R')C(R')=NR, where R= CMe3, CHMe2, adamantyl, p-tolyl, p-anisyl, and mesityl when R'=H, and R= p-anisyl when R'= Me, have been prepared. The complexes are paramagnetic, but their magnetic moments are less than expected for the two uncoupled spin carriers, (C5Me5)2Yb(III, 4f13) and the diazabutadiene radical anions (S=1/2), which implies exchange coupling between the spins. The variable temper… more
Date: November 4, 2006
Creator: Andersen, Richard; Walter, Marc D.; Berg, David J. & Andersen, Richard A.
Partner: UNT Libraries Government Documents Department
open access

Age validation of canary rockfish (Sebastes pinniger) using two independent otolith techniques: lead-radium and bomb radiocarbon dating.

Description: Canary rockfish (Sebastes pinniger) have long been an important part of recreational and commercial rockfish fishing from southeast Alaska to southern California, but localized stock abundances have declined considerably. Based on age estimates from otoliths and other structures, lifespan estimates vary from about 20 years to over 80 years. For the purpose of monitoring stocks, age composition is routinely estimated by counting growth zones in otoliths; however, age estimation procedures and li… more
Date: November 4, 2007
Creator: Andrews, A H; Kerr, L A; Cailliet, G M; Brown, T A; Lundstrom, C C & Stanley, R D
Partner: UNT Libraries Government Documents Department
open access

Z: A Fast Pulsed Power Generator for Ultra-High Magnetic Field Generation

Description: Advances in fast, pulsed-power technologies have resulted in the development of very high current drivers that have current rise times - 100 ns. The largest such pulsed power drive r today is the new Z accelerator located at Sandia National Laboratories in Albuquerque, New Mexico. Z is capable of delivering more than 20 MA with a time-to-peak of 105 ns to low inductance (- 1 nH)loads. Such large drivers are capable of directly generating magnetic fields approaching 3 kT in small, 1 -cm3, volume… more
Date: November 4, 1998
Creator: Asay, J. R.; Bailey, J. E.; Bernard, M. A.; Hall, C. A.; McDaniel, D. H.; Spielman, R. B. et al.
Partner: UNT Libraries Government Documents Department
open access

The Production and Acceleration of Radioactive Ion Beams at the HRIBF

Description: The Holifield Radioactive Ion Beam Facility (HRIBF) includes a cyclotron (ORIC) which provides high-intensity light-ions for producing radioactive atoms, and a 25 MV tandem electrostatic accelerator which is used to accelerate the radioactive-ions for nuclear structure and nuclear astrophysics research. Ion sources and targets suitable for the production of various radioactive ion beams (RIBs) have been developed. Operational experiences, problem areas, and plans for future beam development are… more
Date: November 4, 1998
Creator: Auble, R. L.
Partner: UNT Libraries Government Documents Department
open access

Searches with Mono-Leptons

Description: No Description Available.
Date: November 4, 2013
Creator: Bai, Yang & Tait, Tim M. P.
Partner: UNT Libraries Government Documents Department
open access

Spectral measurements of few-electron uranium ions produced and trapped in a high-energy electron beam ion trap

Description: Measurements of 2s{sub l/2}-2p{sub 3/2} electric dipole and 2p{sub 1/2}-2p{sub 3/2} magnetic dipole and electric quadrupole transitions in U{sup 82+} through U{sup 89+} have been made with a high-resolution crystal spectrometer that recorded the line radiation from stationary ions produced and trapped in a high-energy electron beam ion trap. From the measurements we infer {minus}39.21 {plus_minus} 0.23 eV for the QED contribution to the 2s{sub 1/2}-2p{sub 3/2} transition energy of lithiumlike U… more
Date: November 4, 1994
Creator: Beiersdorfer, P.
Partner: UNT Libraries Government Documents Department
open access

Magnet power control system for the Tandem Mirror Experiment-Upgrade

Description: This paper describes the desktop computer/CAMAC-based system that controls the power source for the Tandem Mirror Experiment-Upgrade (TMX-U) magnet power system. Presently it contains 42 dc rectifier power supplies connected to 24 magnet coils arranged in 17 circuits. During each shot, the system delivers 22.6 MW dc to the magnets for about 3 s. The system is presently being changed to add six power supplies, two solenoidal throttle coils, and two reverse C-coils. When complete, the delivered p… more
Date: November 4, 1983
Creator: Bell, H.H. Jr.
Partner: UNT Libraries Government Documents Department
open access

HRIBF Tandem Accelerator Radiation Safety System Upgrade

Description: The HRIBF Tandem Accelerator Radiation Safety System was designed to permit experimenters and operations staff controlled access to beam transport and experiment areas with accelerated beam present. Neutron-Gamma detectors are mounted in eaeh area at points of maximum dose rate and the resulting signals are integrated by redundan~ circuitry; beam is stopped if dose rate or integrated dose exceeds established limits. This paper will describe the system, in use for several vears at the HRIBF, and… more
Date: November 4, 1998
Creator: Blankenship, J. L. & Juras, R. C.
Partner: UNT Libraries Government Documents Department
open access

Chemically Selective Coated Quartz Crystal Microbalance (QCM) Array for Detection of Volatile Organic Chemicals

Description: Liquid flow cells have been fabricated to prepare an array of QCMS operating simultaneously for detection and identification of VOCS in water. TWO signals, a tlequency response and a damping voltage response, were obtained per resonator. A blank QCM was used as a reference to account for changes in liquid density and viscosity. Nine different polymer coatings applied using a spin coat technique have been examined for VOC response under liquid flow conditions. A matrix of three classes of VOCS w… more
Date: November 4, 1998
Creator: Bohuszewicz, T. V.; Frye-Mason, G. C.; Martin, S. J.; Osbourn, G. C.; Schneider, T. W. & Spates, J. J.
Partner: UNT Libraries Government Documents Department
open access

High Explosive Radio Telemetry System

Description: This paper overviews the High Explosive Radio Telemetry (HERT) system, under co-development by Los Alamos National Laboratories and Allied Signal Federal Manufacturing & Technologies. This telemetry system is designed to measure the initial performance of an explosive package under flight environment conditions, transmitting data from up to 64 sensors. It features high speed, accurate time resolution (10 ns) and has the ability to complete transmission of data before the system is destroyed by … more
Date: November 4, 1998
Creator: Bracht, R. R.; Crawford, T. R.; Johnson, R. L. & Mclaughlin, B. M.
Partner: UNT Libraries Government Documents Department
open access

Evolved QCD predictions for the meson-photon transition form factors: beyond the semiclassical AdS/QCD approximation

Description: The QCD evolution of the pion distribution amplitude (DA) {phi}{sub {pi}} (x, Q{sup 2}) is computed for several commonly used models. Our analysis includes the nonperturbative form predicted by lightfront holographic QCD, thus combining the nonperturbative bound state dynamics of the pion with the perturbative ERBL evolution of the pion distribution amplitude. We calculate the meson-photon transition form factors for the {pi}{sup 0}, {eta} and {eta}' using the hard-scattering formalism. We poin… more
Date: November 4, 2011
Creator: Brodsky, Stanley J.; /SLAC; Cao, Fu-Guang; U., /Massey U. /Beijing Normal; de Teramond, Guy F. & U., /Costa Rica
Partner: UNT Libraries Government Documents Department
open access

Correlation between structure and electrical transport in ion-irradiated graphene grown on Cu foils

Description: Graphene grown by chemical vapor deposition and supported on SiO2 and sapphire substrates was studied following controlled introduction of defects induced by 35 keV carbon ion irradiation. Changes in Raman spectra following fluences ranging from 1012 cm-2 to 1015 cm-2 indicate that the structure of graphene evolves from a highly-ordered layer, to a patchwork of disordered domains, to an essentially amorphous film. These structural changes result in a dramatic decrease in the Hall mobility by or… more
Date: November 4, 2010
Creator: Buchowicz, G.; Stone, P. R.; Robinson, J. T.; Cress, C. D.; Beeman, J. W. & Dubon, O. D.
Partner: UNT Libraries Government Documents Department
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