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2011 Computation Directorate Annual Report
From its founding in 1952 until today, Lawrence Livermore National Laboratory (LLNL) has made significant strategic investments to develop high performance computing (HPC) and its application to national security and basic science. Now, 60 years later, the Computation Directorate and its myriad resources and capabilities have become a key enabler for LLNL programs and an integral part of the effort to support our nation's nuclear deterrent and, more broadly, national security. In addition, the technological innovation HPC makes possible is seen as vital to the nation's economic vitality. LLNL, along with other national laboratories, is working to make supercomputing capabilities and expertise available to industry to boost the nation's global competitiveness. LLNL is on the brink of an exciting milestone with the 2012 deployment of Sequoia, the National Nuclear Security Administration's (NNSA's) 20-petaFLOP/s resource that will apply uncertainty quantification to weapons science. Sequoia will bring LLNL's total computing power to more than 23 petaFLOP/s-all brought to bear on basic science and national security needs. The computing systems at LLNL provide game-changing capabilities. Sequoia and other next-generation platforms will enable predictive simulation in the coming decade and leverage industry trends, such as massively parallel and multicore processors, to run petascale applications. …
Date:
April 11, 2012
Creator:
Crawford, D. L.
Object Type:
Report
System:
The UNT Digital Library
Ab Initio No-Core Shell Model
A long-standing goal of nuclear theory is to determine the properties of atomic nuclei based on the fundamental interactions among the protons and neutrons (i.e., nucleons). By adopting nucleon-nucleon (NN), three-nucleon (NNN) and higher-nucleon interactions determined from either meson-exchange theory or QCD, with couplings fixed by few-body systems, we preserve the predictive power of nuclear theory. This foundation enables tests of nature's fundamental symmetries and offers new vistas for the full range of complex nuclear phenomena. Basic questions that drive our quest for a microscopic predictive theory of nuclear phenomena include: (1) What controls nuclear saturation; (2) How the nuclear shell model emerges from the underlying theory; (3) What are the properties of nuclei with extreme neutron/proton ratios; (4) Can we predict useful cross sections that cannot be measured; (5) Can nuclei provide precision tests of the fundamental laws of nature; and (6) Under what conditions do we need QCD to describe nuclear structure, among others. Along with other ab initio nuclear theory groups, we have pursued these questions with meson-theoretical NN interactions, such as CD-Bonn and Argonne V18, that were tuned to provide high-quality descriptions of the NN scattering phase shifts and deuteron properties. We then add meson-theoretic NNN …
Date:
April 11, 2011
Creator:
Barrett, B R; Navratil, P & Vary, J P
Object Type:
Article
System:
The UNT Digital Library
Abortion at or Over 20 Weeks' Gestation: Frequently Asked Questions
This report provides answers to frequently asked questions concerning abortions that are performed in the second trimester of a woman's pregnancy because Congress and many state legislatures are considering legislation that would limit or ban abortions in midpregnancy. This report does not discuss constitutional or legal questions nor does it discusses differing state regulations regarding such abortions.
Date:
April 11, 2018
Creator:
Barry, Matthew B.
Object Type:
Report
System:
The UNT Digital Library
Africa: Sustainability, Poverty, Education
Presentation for the 2015 University of North Texas (UNT) Student and Faculty Research Symposium on African Studies. This presentation discusses sustainability, poverty, and education in Africa.
Date:
April 11, 2015
Creator:
Ingman, Stanley R.
Object Type:
Presentation
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 137, No. 47, Ed. 1 Thursday, April 11, 2013
Weekly newspaper from Albany, Texas that includes local, state and national news along with advertising.
Date:
April 11, 2013
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
ALLOYING-DRIVEN PHASE STABILITY IN GROUP-VB TRANSITION METALS UNDER COMPRESSION
The change in phase stability of Group-VB (V, Nb, and Ta) transition metals due to pressure and alloying is explored by means of first-principles electronic-structure calculations. It is shown that under compression stabilization or destabilization of the ground-state body-centered cubic (bcc) phase of the metal is mainly dictated by the band-structure energy that correlates well with the position of the Kohn anomaly in the transverse acoustic phonon mode. The predicted position of the Kohn anomaly in V, Nb, and Ta is found to be in a good agreement with data from the inelastic x-ray or neutron scattering measurements. In the case of alloying the change in phase stability is defined by the interplay between the band-structure and Madelung energies. We show that band-structure effects determine phase stability when a particular Group-VB metal is alloyed with its nearest neighbors within the same d-transition series: the neighbor with less and more d electrons destabilize and stabilize the bcc phase, respectively. When V is alloyed with neighbors of a higher (4d- or 5d-) transition series, both electrostatic Madelung and band-structure energies stabilize the body-centered-cubic phase. The opposite effect (destabilization) happens when Nb or Ta is alloyed with neighbors of the 3d-transition series.
Date:
April 11, 2011
Creator:
Landa, A & Soderlind, P
Object Type:
Article
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 112, No. 90, Ed. 1 Sunday, April 11, 2010
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 2010
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 112, No. 261, Ed. 1 Wednesday, April 11, 2012
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 2012
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 112, No. 282, Ed. 1 Wednesday, April 11, 2018
Semiweekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 2018
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 113, No. 224, Ed. 1 Thursday, April 11, 2013
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 2013
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 114, No. 272, Ed. 1 Friday, April 11, 2014
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 2014
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 118, No. 72, Ed. 1 Tuesday, April 11, 2017
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 2017
Creator:
Steinkopff, Eric
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, April 11, 2018
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
April 11, 2018
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Alvin Sun (Alvin, Tex.), Vol. 126, No. 30, Ed. 1 Monday, April 11, 2016
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
April 11, 2016
Creator:
Money, David
Object Type:
Newspaper
System:
The Portal to Texas History
Amplitude Analysis and Measurement of the Time-dependent CP Asymmetry of B0 to KsKsKs Decays
We present the first results on the Dalitz-plot structure and improved measurements of the time-dependent CP-violation parameters of the process B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} obtained using 468 x 10{sup 6} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. The Dalitz-plot structure is probed by a time-integrated amplitude analysis that does not distinguish between B{sup 0} and {bar B}{sup 0} decays. We measure the total inclusive branching fraction {Beta}(B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0}) = (6.19 {+-} 0.48 {+-} 0.15 {+-} 0.12) x 10{sup -6}, where the first uncertainty is statistical, the second is systematic, and the third represents the Dalitz-plot signal model dependence. We also observe evidence for the intermediate resonant states f{sub 0}(980), f{sub 0}(1710), and f{sub 2}(2010). Their respective product branching fractions are measured to be (2.70{sub -1.19}{sup +1.25} {+-} 0.36 {+-} 1.17) x 10{sup -6}, (0.50{sub -0.24}{sup +0.46} {+-} 0.04 {+-} 0.10) x 10{sup -6}, and (0.54{sub -0.20}{sup +0.21} {+-} 0.03 {+-} 0.52) x 10{sup -6}. Additionally, we determine the mixing-induced CP-violation parameters to be S = -0.94{sub -0.21}{sup +0.24} {+-} 0.06 and C = -0.17 {+-} 0.18 {+-} …
Date:
April 11, 2012
Creator:
Lees, J. P.
Object Type:
Article
System:
The UNT Digital Library
Analysis of 1w Bulk Laser Damage in KDP
The influence of laser parameters on laser-induced damage in the bulk of KDP is difficult to determine because the damage manifests as discrete sites a few microns in diameter distributed throughout a relatively large volume of material. Here, they present a method to directly measure the size and location of many thousands of such sites and correlate them to the laser conditions which produced them. This technique is used to characterize the effects of pulse duration on damage initiated by 1053 nm light in the bulk of KDP crystals. They find that the density of damage sites produced by 1053 nm light is less sensitive to pulse duration than was previously reported for 526 nm and 351 nm light. In addition, the effect of pulse duration on the size of the damage sites produced appears insensitive to wavelength.
Date:
April 11, 2011
Creator:
Cross, D A & Carr, C W
Object Type:
Article
System:
The UNT Digital Library
Analytical discussion of causative constructions
Lamkang causative constructions discussed by Shobhana Chelliah and Sumshot Khular. From this recording one can learn about noun marking in causative constructions as well as the type of verb that takes the causative and the position of directional prefixes in causative constructions.
Date:
April 11, 2016
Creator:
Chelliah, Shobhana Lakshmi
Object Type:
Sound
System:
The UNT Digital Library
The Aransas Pass Progress (Aransas Pass, Tex.), Vol. 109, No. 15, Ed. 1 Wednesday, April 11, 2018
Weekly newspaper from Aransas Pass, Texas that includes local, state, and national news along with advertising.
Date:
April 11, 2018
Creator:
Martinez, Norma L.
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), Vol. 105, No. 15, Ed. 1 Thursday, April 11, 2013
Weekly newspaper from Archer City, Texas that includes local, state and national news along with advertising.
Date:
April 11, 2013
Creator:
Phillips, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
ARM MJO Investigation Experiment on Gan Island (AMIE-Gan) Science Plan
The overarching campaign, which includes the ARM Mobile Facility 2 (AMF2) deployment in conjunction with the Dynamics of the Madden-Julian Oscillation (DYNAMO) and the Cooperative Indian Ocean experiment on intraseasonal variability in the Year 2011 (CINDY2011) campaigns, is designed to test several current hypotheses regarding the mechanisms responsible for Madden-Julian Oscillation (MJO) initiation and propagation in the Indian Ocean area. The synergy between the proposed AMF2 deployment with DYNAMO/CINDY2011, and the corresponding funded experiment on Manus, combine for an overarching ARM MJO Investigation Experiment (AMIE) with two components: AMF2 on Gan Island in the Indian Ocean (AMIE-Gan), where the MJO initiates and starts its eastward propagation; and the ARM Manus site (AMIE-Manus), which is in the general area where the MJO usually starts to weaken in climate models. AMIE-Gan will provide measurements of particular interest to Atmospheric System Research (ASR) researchers relevant to improving the representation of MJO initiation in climate models. The framework of DYNAMO/CINDY2011 includes two proposed island-based sites and two ship-based locations forming a square pattern with sonde profiles and scanning precipitation and cloud radars at both island and ship sites. These data will be used to produce a Variational Analysis data set coinciding with the one …
Date:
April 11, 2011
Creator:
Long, C. L.; Del Genio, A.; Deng, M.; Fu, X.; Gustafson, W.; Houze, R. et al.
Object Type:
Text
System:
The UNT Digital Library
The Article V Convention to Propose Constitutional Amendments: Contemporary Issues for Congress
This report looks at how Article V of the Constitution allows Congress to propose amendments -- specifically the process of organizing an Article V Convention, a method that has never been used and which is only briefly outlined in the Constitution.
Date:
April 11, 2014
Creator:
Neale, Thomas H.
Object Type:
Report
System:
The UNT Digital Library
Atmospheric Radiation Measurement Program Climate Research Facility Operations Quarterly Report January 1–March 31, 2011
Individual raw datastreams from instrumentation at the Atmospheric Radiation Measurement (ARM) Climate Research Facility fixed and mobile sites are collected and sent to the Data Management Facility (DMF) at Pacific Northwest National Laboratory (PNNL) for processing in near real-time. Raw and processed data are then sent approximately daily to the ARM Data Archive, where they are made available to users. For each instrument, we calculate the ratio of the actual number of processed data records received daily at the Data Archive to the expected number of data records. The results are tabulated by (1) individual datastream, site, and month for the current year and (2) site and fiscal year (FY) dating back to 1998.
Date:
April 11, 2011
Creator:
Sisterson, DL
Object Type:
Text
System:
The UNT Digital Library
Authorities: UNT Libraries Digital Collections
Presentation for the 2017 meeting of the IMLS Shareable Authorities Forum. This presentation provides an in-depth look at institutional practices regarding authorities at University of North Texas Libraries.
Date:
April 11, 2017
Creator:
Phillips, Mark Edward
Object Type:
Presentation
System:
The UNT Digital Library
Automated Teller Machines: Some Consumer Fees Have Increased
A letter report issued by the Government Accountability Office with an abstract that begins "Automated teller machine (ATM) operators include financial institutions--banks and credit unions--as well as independent firms. Industry representatives GAO spoke with estimate there are approximately 420,000 ATMs in the United States. They estimate that financial institutions operate and set the fees for about half of the market, and independent operators work together with merchants to operate the remainder and to determine the fees incurred by consumers. ATM operators have differing business models that affect the way they set ATM fees for consumers. Financial institutions operate ATMs as a convenience to their own account holders, who generally do not pay fees to use these ATMs, while non-account-holding customers do. At independent ATMs, most consumers incur a surcharge fee, although there are some exceptions, such as when the ATM is part of a surcharge-free ATM network."
Date:
April 11, 2013
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library