Clouds and Chemistry in the Atmosphere of Extrasolar Planet HR8799b (open access)

Clouds and Chemistry in the Atmosphere of Extrasolar Planet HR8799b

Using the integral field spectrograph OSIRIS, on the Keck II telescope, broad near-infrared H and K-band spectra of the young exoplanet HR8799b have been obtained. In addition, six new narrow-band photometric measurements have been taken across the H and K bands. These data are combined with previously published photometry for an analysis of the planet's atmospheric properties. Thick photospheric dust cloud opacity is invoked to explain the planet's red near-IR colors and relatively smooth near-IR spectrum. Strong water absorption is detected, indicating a Hydrogen-rich atmosphere. Only weak CH{sub 4} absorption is detected at K band, indicating efficient vertical mixing and a disequilibrium CO/CH{sub 4} ratio at photospheric depths. The H-band spectrum has a distinct triangular shape consistent with low surface gravity. New giant planet atmosphere models are compared to these data with best fitting bulk parameters, T{sub eff} = 1100K {+-} 100 and log(g) = 3.5 {+-} 0.5 (for solar composition). Given the observed luminosity (log L{sub obs}/L{sub {circle_dot}} {approx} -5.1), these values correspond to a radius of 0.75 R{sub Jup{sub 0.12}{sup +0.17}} and mass {approx} 0.72 M{sub Jup{sub -0.6}{sup +2.6}} - strikingly inconsistent with interior/evolution models. Enhanced metallicity (up to {approx} 10 x that of the Sun) along with …
Date: March 21, 2011
Creator: Barman, T. S.; Macintosh, B. A.; Konopacky, Q. M. & Marois, C.
Object Type: Article
System: The UNT Digital Library
An Equivalent Circuit Model and Power Calculations for the APS SPX Crab Cavities. (open access)

An Equivalent Circuit Model and Power Calculations for the APS SPX Crab Cavities.

An equivalent parallel resistor-inductor-capacitor (RLC) circuit with beam loading for a polarized TM110 dipole-mode cavity is developed and minimum radio-frequency (rf) generator requirements are calculated for the Advanced Photon Source (APS) short-pulse x-ray (SPX) superconducting rf (SRF) crab cavities. A beam-loaded circuit model for polarized TM110 mode crab cavities was derived. The single-cavity minimum steady-state required generator power has been determined for the APS SPX crab cavities for a storage ring current of 200mA DC current as a function of external Q for various vertical offsets including beam tilt and uncontrollable detuning. Calculations to aid machine protection considerations were given.
Date: March 21, 2012
Creator: Berenc, T.
Object Type: Report
System: The UNT Digital Library
Final Scientific/Technical Report "Arc Tube Coating System for Color Consistency" (open access)

Final Scientific/Technical Report "Arc Tube Coating System for Color Consistency"

DOE has enabled the use of coating materials using low cost application methods on light sources to positively affect the output of those sources. The coatings and light source combinations have shown increased lumen output of LED fixtures (1.5%-2.0%), LED arrays (1.4%) and LED powered remote phosphor systems – Philips L-Prize lamp (0.9%). We have also demonstrated lifetime enhancements (3000 hrs vs 8000 hrs) and shifting to higher CRI (51 to 65) in metal halide high intensity discharge lamps with metal oxide coatings. The coatings on LEDs and LED products are significant as the market is moving increasingly more towards LED technology. Enhancements in LED performance are demonstrated in this work through the use of available materials and low cost application processes. EFOI used low refractive index fluoropolymers and low cost dipping processes for application of the material to surfaces related to light transmission of LEDs and LED products. Materials included Teflon AF, an amorphous fluorinated polymer and fluorinated acrylic monomers. The DOE SSL Roadmap sets goals for LED performance moving into the future. EFOI’s coating technology is a means to shift the performance curve for LEDs. This is not limited to one type of LED, but is relevant across …
Date: March 21, 2013
Creator: Buelow, Roger; Jenson, Chris & Kazenski, Keith
Object Type: Report
System: The UNT Digital Library
Portal 6.0 Released!! (open access)

Portal 6.0 Released!!

None
Date: March 21, 2011
Creator: Cantor, Michael & Smirnova, Tatyana
Object Type: Article
System: The UNT Digital Library
BOUT Simulations of Edge Turbulence in the DIII-D Tokamak (open access)

BOUT Simulations of Edge Turbulence in the DIII-D Tokamak

None
Date: March 21, 2012
Creator: Cohen, B. I.; Umansky, M.; Makowski, M.; Nevins, W. M.; Boedo, J.; Rudakov, D. et al.
Object Type: Article
System: The UNT Digital Library
The LIFE Laser Design in Context: A Comparison to the State-of-the-Art (open access)

The LIFE Laser Design in Context: A Comparison to the State-of-the-Art

The current point design for the LIFE laser leverages decades of solid-state laser development in order to achieve the performance and attributes required for inertial fusion energy. This document provides a brief comparison of the LIFE laser point design to other state-of-the-art solid-state lasers. Table I compares the attributes of the current LIFE laser point design to other systems. the state-of-the-art for single-shot performance at fusion-relevant beamline energies is exemplified by performance observed on the National Ignition Facility. The state-of-the-art for high average power is exemplified by the Northrup Grumman JHPSSL laser. Several items in Table I deal with the laser efficiency; a more detailed discussion of efficiency can be found in reference 5. The electrical-to-optical efficiency of the LIFE design exceeds that of reference 4 due to the availability of higher efficiency laser diode pumps (70% vs. {approx}50% used in reference 4). LIFE diode pumps are discussed in greater detail in reference 6. The 'beam steering' state of the art is represented by the deflection device that will be used in the LIFE laser, not a laser system. Inspection of Table I shows that most LIFE laser attributes have already been experimentally demonstrated. The two cases where the LIFE …
Date: March 21, 2011
Creator: Deri, R. J.; Bayramian, A. J. & Erlandson, A. C.
Object Type: Report
System: The UNT Digital Library
Final Progress Report (open access)

Final Progress Report

The objective of this project was to complete the specifications and drawings for a variable speed kitchen exhaust system and the boiler heating system which when implemented will improve the heating efficiency of the building. The design work was focused in two key areas: kitchen ventilation and heating for the Ernie Turner Center building (ETC). RSA completed design work and issued a set of 100% drawings. RSA also worked with a cost estimator to put together a detailed cost estimate for the project. The design components are summarized.
Date: March 21, 2011
Creator: Fredeen, Amy
Object Type: Text
System: The UNT Digital Library
Solid Electrolyte/Electrode Interfaces: Atomistic Behavior Analyzed Via UHV-AFM, Surface Spectroscopies, and Computer Simulations Computational and Experimental Studies of the Cathode/Electrolyte Interface in Oxide Thin Film Batteries (open access)

Solid Electrolyte/Electrode Interfaces: Atomistic Behavior Analyzed Via UHV-AFM, Surface Spectroscopies, and Computer Simulations Computational and Experimental Studies of the Cathode/Electrolyte Interface in Oxide Thin Film Batteries

The goals of the research were to understand the structural, dynamic, and chemical properties of solid electrolyte surfaces and the cathode/electrolyte interface at an atomistic and nanometer level using both computational and experimental techniques.
Date: March 21, 2012
Creator: Garofalini, Stephen H.
Object Type: Text
System: The UNT Digital Library
Rayleigh-Taylor Instability within Sediment Layers Due to Gas Retention: Preliminary Theory and Experiments (open access)

Rayleigh-Taylor Instability within Sediment Layers Due to Gas Retention: Preliminary Theory and Experiments

In Hanford underground waste storage tanks, a typical waste configuration is settled beds of waste particles beneath liquid layers. The settled beds are typically composed of layers, and these layers can have different physical and chemical properties. One postulated configuration within the settled bed is a less-dense layer beneath a more-dense layer. The different densities can be a result of different gas retention in the layers or different degrees of settling and compaction in the layers. This configuration can experience a Rayleigh-Taylor (RT) instability where the less dense lower layer rises into the upper layer. Previous studies of gas retention and release have not considered potential buoyant motion within a settle bed of solids. The purpose of this report is to provide a review of RT instabilities, discuss predictions of RT behavior for sediment layers, and summarize preliminary experimental observations of RT instabilities in simulant experiments.
Date: March 21, 2013
Creator: Gauglitz, Phillip A.; Wells, Beric E.; Buchmiller, William C. & Rassat, Scot D.
Object Type: Report
System: The UNT Digital Library
Illumina Unamplified Indexed Library Construction: An Automated Approach (open access)

Illumina Unamplified Indexed Library Construction: An Automated Approach

Manual library construction is a limiting factor in Illumina sequencing. Constructing libraries by hand is costly, time-consuming, low-throughput, and ergonomically hazardous, and constructing multiple libraries introduces risk of library failure due to pipetting errors. The ability to construct multiple libraries simultaneously in automated fashion represents significant cost and time savings. Here we present a strategy to construct up to 96 unamplified indexed libraries using Illumina TruSeq reagents and a Biomek FX robotic platform. We also present data to indicate that this library construction method has little or no risk of cross-contamination between samples.
Date: March 21, 2011
Creator: Hack, Christopher A.; Sczyrba, Alexander & Cheng, Jan-Fang
Object Type: Article
System: The UNT Digital Library
Near-Field Effects of Cherenkov Radiation Induced By Ultra High Energy Cosmic Neutrinos (open access)

Near-Field Effects of Cherenkov Radiation Induced By Ultra High Energy Cosmic Neutrinos

None
Date: March 21, 2013
Creator: Hu, Chia-Yu; /Taiwan, Natl. Taiwan U.; Chen, Chih-Ching; /Taiwan, Natl. Taiwan U.; Chen, Pisin & /Taiwan, Natl. Taiwan U. /KIPAC, Menlo Park
Object Type: Article
System: The UNT Digital Library
National Center for Nuclear Security: The Nuclear Forensics Project (F2012) (open access)

National Center for Nuclear Security: The Nuclear Forensics Project (F2012)

These presentation visuals introduce the National Center for Nuclear Security. Its chartered mission is to enhance the Nation’s verification and detection capabilities in support of nuclear arms control and nonproliferation through R&D activities at the NNSS. It has three focus areas: Treaty Verification Technologies, Nonproliferation Technologies, and Technical Nuclear Forensics. The objectives of nuclear forensics are to reduce uncertainty in the nuclear forensics process & improve the scientific defensibility of nuclear forensics conclusions when applied to nearsurface nuclear detonations. Research is in four key areas: Nuclear Physics, Debris collection and analysis, Prompt diagnostics, and Radiochemistry.
Date: March 21, 2012
Creator: Klingensmith, A. L.
Object Type: Article
System: The UNT Digital Library
Annual Report of Groundwater Monitoring at Everest, Kansas, in 2010. (open access)

Annual Report of Groundwater Monitoring at Everest, Kansas, in 2010.

The Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA) began its environmental investigations at Everest, Kansas, in 2000. The work at Everest is implemented on behalf of the CCC/USDA by Argonne National Laboratory, under the oversight of the Kansas Department of Health and Environment (KDHE). The results of the environmental investigations have been reported in detail (Argonne 2001, 2003, 2006a,b). The lateral extent of the carbon tetrachloride in groundwater over the years of investigation has been interpreted as shown in Figure 1.1 (2001-2002 data), Figure 1.2 (2006 data), Figure 1.3 (2008 data), and Figure 1.4 (2009 data). The pattern of groundwater flow and inferred contaminant migration has consistently been to the north-northwest from the former CCC/USDA facility toward the Nigh property, and then west-southwest from the Nigh property (e.g., Figure 1.5 [2008 data] and Figure 1.6 [2009 data]). Both the monitoring data for carbon tetrachloride and the low groundwater flow rates estimated for the Everest aquifer unit (Argonne 2003, 2006a,b, 2008) indicate slow contaminant migration. On the basis of the accumulated findings, in March 2009 the CCC/USDA developed a plan for annual monitoring of the groundwater and surface water. This current monitoring plan (Appendix A in the report …
Date: March 21, 2011
Creator: Lafreniere, L. M.
Object Type: Report
System: The UNT Digital Library
Benchmarking Of Improved DPAC Transient Deflagration Analysis Code (open access)

Benchmarking Of Improved DPAC Transient Deflagration Analysis Code

The transient deflagration code DPAC (Deflagration Pressure Analysis Code) has been upgraded for use in modeling hydrogen deflagration transients. The upgraded code is benchmarked using data from vented hydrogen deflagration tests conducted at the HYDRO-SC Test Facility at the University of Pisa. DPAC originally was written to calculate peak deflagration pressures for deflagrations in radioactive waste storage tanks and process facilities at the Savannah River Site. Upgrades include the addition of a laminar flame speed correlation for hydrogen deflagrations and a mechanistic model for turbulent flame propagation, incorporation of inertial effects during venting, and inclusion of the effect of water vapor condensation on vessel walls. In addition, DPAC has been coupled with CEA, a NASA combustion chemistry code. The deflagration tests are modeled as end-to-end deflagrations. The improved DPAC code successfully predicts both the peak pressures during the deflagration tests and the times at which the pressure peaks.
Date: March 21, 2013
Creator: Laurinat, James E. & Hensel, Steve J.
Object Type: Article
System: The UNT Digital Library
Flammability Analysis For Actinide Oxides Packaged In 9975 Shipping Containers (open access)

Flammability Analysis For Actinide Oxides Packaged In 9975 Shipping Containers

Packaging options are evaluated for compliance with safety requirements for shipment of mixed actinide oxides packaged in a 9975 Primary Containment Vessel (PCV). Radiolytic gas generation rates, PCV internal gas pressures, and shipping windows (times to reach unacceptable gas compositions or pressures after closure of the PCV) are calculated for shipment of a 9975 PCV containing a plastic bottle filled with plutonium and uranium oxides with a selected isotopic composition. G-values for radiolytic hydrogen generation from adsorbed moisture are estimated from the results of gas generation tests for plutonium oxide and uranium oxide doped with curium-244. The radiolytic generation of hydrogen from the plastic bottle is calculated using a geometric model for alpha particle deposition in the bottle wall. The temperature of the PCV during shipment is estimated from the results of finite element heat transfer analyses.
Date: March 21, 2013
Creator: Laurinat, James E.; Askew, Neal M. & Hensel, Steve J.
Object Type: Article
System: The UNT Digital Library
DUK - A Fast and Efficient Kmer Based Sequence Matching Tool (open access)

DUK - A Fast and Efficient Kmer Based Sequence Matching Tool

A new tool, DUK, is developed to perform matching task. Matching is to find whether a query sequence partially or totally matches given reference sequences or not. Matching is similar to alignment. Indeed many traditional analysis tasks like contaminant removal use alignment tools. But for matching, there is no need to know which bases of a query sequence matches which position of a reference sequence, it only need know whether there exists a match or not. This subtle difference can make matching task much faster than alignment. DUK is accurate, versatile, fast, and has efficient memory usage. It uses Kmer hashing method to index reference sequences and Poisson model to calculate p-value. DUK is carefully implemented in C++ in object oriented design. The resulted classes can also be used to develop other tools quickly. DUK have been widely used in JGI for a wide range of applications such as contaminant removal, organelle genome separation, and assembly refinement. Many real applications and simulated dataset demonstrate its power.
Date: March 21, 2011
Creator: Li, Mingkun; Copeland, Alex & Han, James
Object Type: Article
System: The UNT Digital Library
Preparation and initial characterization of fluidized bed steam reforming pure-phase standards (open access)

Preparation and initial characterization of fluidized bed steam reforming pure-phase standards

Hanford is investigating the Fluidized Bed Steam Reforming (FBSR) process for their Low Activity Waste. The FBSR process offers a low-temperature continuous method by which liquid waste can be processed with the addition of clay into a sodium aluminosilicate (NAS) waste form. The NAS waste form is mainly comprised of nepheline (NaAlSiO{sub 4}), sodalite (Na{sub 8}[AlSiO{sub 4}]{sub 6}Cl{sub 2}), and nosean (Na{sub 8}[AlSiO{sub 4}]{sub 6}SO{sub 4}). Anions such as perrhenate (ReO{sub 4}{sup -}), pertechnetate (TcO{sub 4}{sup -}), and iodine (I{sup -}) are expected to replace sulfate in the nosean structure and/or chloride in the sodalite mineral structure (atomically bonded inside the aluminosilicate cages that these mineral structures possess). In the FBSR waste form, each of these phases can exist in a variety of solid solutions that differ from the idealized forms observed in single crystals in nature. The lack of understanding of the durability of these stoichiometric or idealized mineral phases complicates the ability to deconvolute the durability of the mixed phase FBSR product since it is a combination of different NAS phases. To better understand the behavior, fabrication and testing of the individual phases of the FBSR product is required. Analytical Development (AD) of the Science and Technology directorate …
Date: March 21, 2013
Creator: Missimer, D. M. & Rutherford, R. L.
Object Type: Report
System: The UNT Digital Library
Luminous Satellites of Early-Type Galaxies I: Spatial Distribution (open access)

Luminous Satellites of Early-Type Galaxies I: Spatial Distribution

None
Date: March 21, 2013
Creator: Nierenberg, A. M.; Auger, M. W.; Treu, T.; /UC, Santa Barbara; Marshall, P. J.; /KIPAC, Menlo Park /Oxford U. et al.
Object Type: Article
System: The UNT Digital Library
Target Allocation Methodology for China's Provinces: Energy Intensity in the 12th FIve-Year Plan (open access)

Target Allocation Methodology for China's Provinces: Energy Intensity in the 12th FIve-Year Plan

Experience with China's 20% energy intensity improvement target during the 11th Five-Year Plan (FYP) (2006-2010) has shown the challenges of rapidly setting targets and implementing measures to meet them. For the 12th FYP (2011-2015), there is an urgent need for a more scientific methodology to allocate targets among the provinces and to track physical and economic indicators of energy and carbon saving progress. This report provides a sectoral methodology for allocating a national energy intensity target - expressed as percent change in energy per unit gross domestic product (GDP) - among China's provinces in the 12th FYP. Drawing on international experience - especially the European Union (EU) Triptych approach for allocating Kyoto carbon targets among EU member states - the methodology here makes important modifications to the EU approach to address an energy intensity rather than a CO{sub 2} emissions target, and for the wider variation in provincial energy and economic structure in China. The methodology combines top-down national target projections and bottom-up provincial and sectoral projections of energy and GDP to determine target allocation of energy intensity targets. Total primary energy consumption is separated into three end-use sectors - industrial, residential, and other energy. Sectoral indicators are used to …
Date: March 21, 2011
Creator: Ohshita, Stephanie & Price, Lynn
Object Type: Report
System: The UNT Digital Library
Fast MAP Search for Compact Additive Tree Ensembles (CATE) (open access)

Fast MAP Search for Compact Additive Tree Ensembles (CATE)

None
Date: March 21, 2013
Creator: Prenger, R J; Chen, B Y; Marlatt, T L & Merl, D M
Object Type: Report
System: The UNT Digital Library
First observation of the Charmless Decay B to K pi0pi0 and Study of its Dalitz Plot Structure (open access)

First observation of the Charmless Decay B to K pi0pi0 and Study of its Dalitz Plot Structure

Results for the first measurement of the inclusive branching and CP asymmetry of the charmless 3-body decay B{sup +} {yields} K{sup +}{pi}{sup 0}{pi}{sup 0} are presented. The analysis uses a data sample with an integrated luminosity of 429.0 fb{sup -1}, recorded by the BABAR detector at the PEP-II asymmetric B Factory. This sample corresponds to 470.9 {+-} 2.8 million B{bar B} pairs. Measurements of the branching fractions (B) and CP asymmetries (A{sub CP}) of some of the intermediate resonances in the K{sup +}{pi}{sup 0}{pi}{sup 0} Dalitz plot are also presented.
Date: March 21, 2012
Creator: Puccio, Eugenia Maria Teresa Irene & /SLAC, /Warwick U.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Analysis and Mitigation of X-Ray Hazard Generated From High Intensity Laser-Target Interactions (open access)

Analysis and Mitigation of X-Ray Hazard Generated From High Intensity Laser-Target Interactions

Interaction of a high intensity laser with matter may generate an ionizing radiation hazard. Very limited studies have been made, however, on the laser-induced radiation protection issue. This work reviews available literature on the physics and characteristics of laser-induced X-ray hazards. Important aspects include the laser-to-electron energy conversion efficiency, electron angular distribution, electron energy spectrum and effective temperature, and bremsstrahlung production of X-rays in the target. The possible X-ray dose rates for several femtosecond Ti:sapphire laser systems used at SLAC, including the short pulse laser system for the Matter in Extreme Conditions Instrument (peak power 4 TW and peak intensity 2.4 x 10{sup 18} W/cm{sup 2}) were analysed. A graded approach to mitigate the laser-induced X-ray hazard with a combination of engineered and administrative controls is also proposed.
Date: March 21, 2011
Creator: Qiu, R.; Liu, J. C.; Prinz, A. A.; Rokni, S. H.; Woods, M. & Xia, Z.
Object Type: Article
System: The UNT Digital Library
Density Gradient Stabilization of Electron Temperature Gradient Driven Turbulence in a Spherical Tokamak (open access)

Density Gradient Stabilization of Electron Temperature Gradient Driven Turbulence in a Spherical Tokamak

In this letter we report the first clear experimental observation of density gradient stabilization of electron temperature gradient driven turbulence in a fusion plasma. It is observed that longer wavelength modes, k⊥ρs ≤10, are most stabilized by density gradient, and the stabilization is accompanied by about a factor of two decrease in the plasma effective thermal diffusivity.
Date: March 21, 2011
Creator: Ren, Y.; Mazzucato, E.; Guttenfelder, W.; Bell, R. E.; Domier, C. W.; LeBlanc, B. P. et al.
Object Type: Report
System: The UNT Digital Library
Hanford Site Rare Plant Monitoring Report for Calendar Year 2012 (open access)

Hanford Site Rare Plant Monitoring Report for Calendar Year 2012

Two patches of Columbian yellowcress on the Hanford Reach were visited in both 2011 and 2012 to compare ramet counts between years: near Allerd Pumphouse (Rkm 615.4) and near White Bluffs Boat Launch (Rkm 593.3) (Figure 3). In 2012, the population near Allerd Pumphouse had 45 ramets present within a 5x3 m area. At the same population in 2011, there were 60 ramets. In 2012, the population near White Bluffs Boat Launch had 105 ramets in a 2x2 m area. At the same population in 2011, there were 100 ramets. This data shows that while annual variability does exist, ramet counts were relatively similar from 2011 to 2012. This is likely due to the similar flow regimes of 2011 and 2012, which both had above average snowpack, high flows, and extended spring flooding seasons. A total of 19.6 miles (31.5 km) of the Hanford shoreline were surveyed in 2012, with ten patches identified and approximately 1,250 ramets counted. It is not known how many individual plants this count represents due to the rhizomatous nature of the species. Two of these sites were identified previously in the WNHP database, and the remaining eight were newly identified locations. Eleven of the ramets …
Date: March 21, 2013
Creator: Salstrom, D; Easterly, R; Lindsey, Cole T. & Nugent, John J.
Object Type: Report
System: The UNT Digital Library