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Application of heavy-light methods to B meson physics

Description: The heavy-light method is applied to the study of the B meson spectrum, the pseudoscalar decay constant f{sub B}, the mixing (B) parameter, and exclusive semileptonic B meson decays. Preliminary results are discussed for f{sub B} and the B parameter at {beta} = 5.7 and {kappa} = 0.165 on a 12{sup 3} {times} 24 lattice and at {beta} = 5.9 and {kappa} = 0.158 on a 16{sup 3} {times} 32 lattice. 9 refs., 2 figs., 2 tabs.
Date: December 29, 1989
Creator: Eichten, E.; Hockney, G. & Thacker, H.B.
Partner: UNT Libraries Government Documents Department
open access

3D culture models of normal and malignant breast epithelial cells

Description: This report describes a robust and generalized method for the clustering of various human breast cell lines in 3D and describes the preparation of cellular extracts from these cultures for molecular analysis.
Date: December 29, 2006
Creator: Lee, Genee Y.; Kenny, Paraic A.; Lee, Eva H. & Bissell, Mina J.
Partner: UNT Libraries Government Documents Department
open access

High-precision reflectometry of multilayer coatings for extreme ultraviolet lithography

Description: Synchrotron-based reflectometry is an important technique for the precise determination of optical properties of reflective multilayer coatings for Extreme Ultraviolet Lithography (EUVL). Multilayer coatings enable normal incidence reflectances of more than 65% in the wavelength range between 11 and 15 nm. In order to achieve high resolution and throughput of EUVL systems, stringent requirements not only apply to their mechanical and optical layout, but also apply to the optical properties of t… more
Date: December 29, 1999
Creator: Wedowski, M; Underwood, J H; Gullikson, E M; Bajt, S; Folta, J A; Kearney, P A et al.
Partner: UNT Libraries Government Documents Department
open access

Comparison of Varve and 14C Chronologies from Steel Lake, Minnesota, USA

Description: Annually laminated sediments (varves) offer an effective means of acquiring high-quality paleoenvironmental records. However, the strength of a varve chronology can be compromised by a number of factors, such as missing varves, ambiguous laminations, and human counting error. We assess the quality of a varve chronology for the last three millennia from Steel Lake, Minnesota, through comparisons with nine AMS {sup 14}C dates on terrestrial plant macrofossils from the same core. These comparisons… more
Date: December 29, 2004
Creator: Tian, J; Brown, T A & Hu, F S
Partner: UNT Libraries Government Documents Department
open access

Activation and deactivation of high concentration arsenic with some evidence of precipitation

Description: Using box-shaped profiles created by laser melt annealing, the authors investigate the kinetics of arsenic activation and deactivation. They find deactivation shows no history effects, which can be consistent either with clustering or precipitation for the cases considered. For activation, they notice it occurs on very short time scales, followed by a slower deactivation process. This is suggestive evidence that at least some precipitation occurs.
Date: December 29, 1992
Creator: Rousseau, P. M.; Griffin, P. B.; Plummer, J. D. & Carey, P. G.
Partner: UNT Libraries Government Documents Department
open access

INTERNATIONAL CONFERENCE ON INTELLIGENT SYSTEMS FOR MOLECULAR BIOLOGY (ISMB)

Description: The Intelligent Systems for Molecular Biology (ISMB) conference has provided a general forum for disseminating the latest developments in bioinformatics on an annual basis for the past 13 years. ISMB is a multidisciplinary conference that brings together scientists from computer science, molecular biology, mathematics and statistics. The goal of the ISMB meeting is to bring together biologists and computational scientists in a focus on actual biological problems, i.e., not simply theoretical ca… more
Date: December 29, 2009
Creator: Goldberg, Debra; Hibbs, Matthew; Kall, Lukas; Komandurglayavilli, Ravikumar; Mahony, Shaun; Marinescu, Voichita et al.
Partner: UNT Libraries Government Documents Department
open access

THERMAL PERFORMANCE ANALYSIS FOR SMALL ION-EXCHANGE CESIUM REMOVAL PROCESS

Description: The In-Riser Ion Exchange program focuses on the development of in-tank systems to decontaminate high level waste (HLW) salt solutions at the Savannah River Site (SRS) and the Hanford Site. Small Column Ion Exchange (SCIX) treatment for cesium removal is a primary in-riser technology for decontamination prior to final waste immobilization in Saltstone. Through this process, radioactive cesium from the salt solution is adsorbed onto the ion exchange media which is packed within a flow-through co… more
Date: December 29, 2009
Creator: Lee, S. & King, W.
Partner: UNT Libraries Government Documents Department
open access

The Underground Test Area Project of the Nevada Test Site: Building Confidence in Groundwater Flow and Transport Models at Pahute Mesa Through Focused Characterization Studies

Description: Pahute Mesa at the Nevada Test Site contains about 8.0E+07 curies of radioactivity caused by underground nuclear testing. The Underground Test Area Subproject has entered Phase II of data acquisition, analysis, and modeling to determine the risk to receptors from radioactivity in the groundwater, establish a groundwater monitoring network, and provide regulatory closure. Evaluation of radionuclide contamination at Pahute Mesa is particularly difficult due to the complex stratigraphy and structu… more
Date: December 29, 2009
Creator: Pawloski, G A; Wurtz, J & Drellack, S L
Partner: UNT Libraries Government Documents Department
open access

FAUST observations of ultraviolet sources in the directions of NGC 4038-39 and 6752

Description: This article discusses an analysis of ultraviolet observations with the FAUST shuttle-borne telescope toward the Antennae and NGC 6752 celestial regions resulting in the detection of 46 and 221 candidate sources respectively, for a signal-to-noise ratio of 8.
Date: December 29, 2000
Creator: Daniels, Julian; Brosch, Noah; Almoznino, Elchanan; Shemmer, Ohad; Bowyer, Stuart & Lampton, Michael
Partner: UNT College of Arts and Sciences
open access

Deducing the 237U(n,f) cross-section using the Surrogate Ratio Method

Description: The authors have deduced the cross section for {sup 237}U(n,f) over an equivalent neutron energy range from 0 to 20 MeV using the Surrogate Ratio method. A 55 MeV {sup 4}He beam from the 88 Inch Cyclotron at Lawrence Berkeley National Laboratory was used to induce fission in the following reactions: {sup 238}U({alpha},{alpha}{prime}f) and {sup 236}U({alpha},{alpha}{prime}f). The {sup 238}U reaction was a surrogate for {sup 237}U(n,f) and the {sup 236}U reaction was used as a surrogate for {sup … more
Date: December 29, 2005
Creator: Burke, J. T.; Bernstein, L. A.; Escher, J.; Ahle, L.; Church, J. A.; Dietrich, F. S. et al.
Partner: UNT Libraries Government Documents Department
open access

Kinetics of carboplatin-DNA binding in genomic DNA and bladder cancer cells as determined by accelerator mass spectrometry

Description: Cisplatin and carboplatin are platinum-based drugs that are widely used in cancer chemotherapy. The cytotoxicity of these drugs is mediated by platinum-DNA monoadducts and intra- and interstrand diadducts, which are formed following uptake of the drug into the nucleus of cells. The pharmacodynamics of carboplatin display fewer side effects than for cisplatin, albeit with less potency, which may be due to differences in rates of DNA adduct formation. We report the use of accelerator mass spectro… more
Date: December 29, 2005
Creator: Hah, S S; Stivers, K M; Vere White, R & Henderson, P T
Partner: UNT Libraries Government Documents Department
open access

Calculated concrete target damage by multiple rod impact and penetration

Description: The effect of enhanced crater formation has been demonstrated experimentally when multiple and delayed shaped charge jets impact and penetrate concrete. The concept for enhancement utilizes a single follow-on jet at the centerline of holes produced by multiple precursor jets penetrating the surrounding the region. Calculations of the 3D crater enhancement phenomena have been conducted with multiple rods to simulate the steady state portion of the multiple jet penetration process. It is expected… more
Date: December 29, 2006
Creator: Pincosy, P A & Murphy, M J
Partner: UNT Libraries Government Documents Department
open access

Design and Evaluation of a Virtual Quadrant Receiver for 4-ary Pulse Position Modulation/Optical Code Division Multiple Access (4-ary PPM/O-CDMA)

Description: M-ary pulse position modulation (M-ary PPM) is an alternative to on-off-keying (OOK) that transmits multiple bits as a single symbol occupying a frame of M slots. PPM does not require thresholding as in OOK signaling, instead performing a comparison test among all slots in a frame to make the slot decision. Combining PPM with optical code division multiple access (PPM/O-CDMA) adds the benefit of supporting multiple concurrent, asynchronous bursty PPM users. While the advantages of PPM/O-CDMA ar… more
Date: December 29, 2006
Creator: Mendez, A J; Hernandez, V J; Gagliardi, R M & Bennett, C V
Partner: UNT Libraries Government Documents Department
open access

Code Verification Results of an LLNL ASC Code on Some Tri-Lab Verification Test Suite Problems

Description: As scientific codes become more complex and involve larger numbers of developers and algorithms, chances for algorithmic implementation mistakes increase. In this environment, code verification becomes essential to building confidence in the code implementation. This paper will present first results of a new code verification effort within LLNL's B Division. In particular, we will show results of code verification of the LLNL ASC ARES code on the test problems: Su Olson non-equilibrium radiatio… more
Date: December 29, 2006
Creator: Anderson, S R; Bihari, B L; Salari, K & Woodward, C S
Partner: UNT Libraries Government Documents Department
open access

Solving the Accelerator-Condenser Coupling Problem in a Nanosecond Dynamic Transmission Electron Microscope

Description: We describe a modification to a transmission electron microscope (TEM) that allows it to briefly (using a pulsed-laser-driven photocathode) operate at currents in excess of 10 mA while keeping the effects of condenser lens aberrations to a minimum. This modification allows real-space imaging of material microstructure with a resolution of order 10 nm over regions several {micro}m across with an exposure time of 15 ns. This is more than 6 orders of magnitude faster than typical video-rate TEM im… more
Date: December 29, 2009
Creator: Reed, B W; LaGrange, T; Shuttlesworth, R M; Gibson, D J; Campbell, G H & Browning, N D
Partner: UNT Libraries Government Documents Department
open access

Large N elliptic genus and AdS/CFT Correspondence

Description: According to one of Maldacena's dualities, type IIB string theory on AdS{sub 3} x S{sup 3} x K3 is equivalent to a certain N = (4, 4) superconformal field theory. In this note we compute the elliptic genus of the boundary theory in the supergravity approximation. A finite quantity is obtained once we introduce a particular exclusion principle. In the regime where the supergravity approximation is reliable, we find exact agreement with the elliptic genus of a sigma model with target space K3{sup… more
Date: December 29, 1998
Creator: de Boer, Jan
Partner: UNT Libraries Government Documents Department
open access

Spherical Harmonic Solutions to the 3D Kobayashi Benchmark Suite

Description: Spherical harmonic solutions of order 5, 9 and 21 on spatial grids containing up to 3.3 million cells are presented for the Kobayashi benchmark suite. This suite of three problems with simple geometry of pure absorber with large void region was proposed by Professor Kobayashi at an OECD/NEA meeting in 1996. Each of the three problems contains a source, a void and a shield region. Problem 1 can best be described as a box in a box problem, where a source region is surrounded by a square void regi… more
Date: December 29, 1999
Creator: Brown, P.N.; Chang, B. & Hanebutte, U.R.
Partner: UNT Libraries Government Documents Department
open access

Diferencias morfométricas de dos especies del género Eatoniella en Isla Navarino, Reserva de Biosfera Cabo de Hornos, Chile

Description: This article describes the external morphometrics of shell and radula morphology as performed in two species of micromollusks of the genus Eatoniella in Navarino Island, Chile.
Date: December 29, 2016
Creator: Rosenfeld, Sebastián; Aldea, Cristian; Ojeda, Jaime; Mansilla, Andrés O. & Rozzi, Ricardo, 1960-
Partner: UNT College of Arts and Sciences
open access

Cost Optimization of Induction Linac Drivers for Linear Colliders

Description: Recent developments in high reliability components for linear induction accelerators (LIA) make possible the use of these devices as economical power drives for very high gradient linear colliders. A particularly attractive realization of this ''two-beam accelerator'' approach is to configure the LIA as a monolithic relativistic klystron operating at 10 to 12 GHz with induction cells providing periodic reacceleration of the high current beam. Based upon a recent engineering design of a state-of… more
Date: December 29, 1986
Creator: Barletta, W. A.
Partner: UNT Libraries Government Documents Department
open access

Deliquescence of NaCl-NaNO3 and KNO3-NaNO3 Salt Mixtures at 90C

Description: We conducted reversed deliquescence experiments in saturated NaCl-NaNO3-H2O and KNO{sub 3}-NaNO{sub 3}-H{sub 2}O systems at 90 C to determine relative humidity and solution composition. NaCl, NaNO{sub 3}, and KNO{sub 3} represent members of dust salt assemblages that are likely to deliquesce and form concentrated brines on high-level radioactive waste package surfaces in a repository environment at Yucca Mountain, NV, USA. Model predictions agree with experimental results for the NaCl-NaNO{sub … more
Date: December 29, 2003
Creator: Carroll, S; Craig, L & Wolery, T
Partner: UNT Libraries Government Documents Department
open access

Dense Matter Characterization by X-ray Thomson Scattering

Description: We discuss the extension of the powerful technique of Thomson scattering to the x-ray regime for providing an independent measure of plasma parameters for dense plasmas. By spectrally-resolving the scattering, the coherent (Rayleigh) unshifted scattering component can be separated from the incoherent Thomson component, which is both Compton and Doppler shifted. The free electron density and temperature can then be inferred from the spectral shape of the high frequency Thomson scattering compone… more
Date: December 29, 2000
Creator: Landen, O. L.; Glenzer, S. H.; Edwards, M. J.; Lee, R. W.; Collins, G. W.; Cauble, R. C. et al.
Partner: UNT Libraries Government Documents Department
open access

Thin-walled compliant plastic structures for meso-scale fluidic systems

Description: Thin-walled, compliant plastic structures for meso-scale fluidic systems were fabricated, tested and used to demonstrate valving, pumping, metering and mixing. These structures permit the isolation of actuators and sensors from the working fluid, thereby reducing chemical compatibility issues. The thin-walled, compliant plastic structures can be used in either a permanent, reusable system or as an inexpensive disposable for single-use assay systems. The implementation of valving, pumping, mixin… more
Date: December 29, 1998
Creator: Miles, R. R. & Schumann, D. L.
Partner: UNT Libraries Government Documents Department
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