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347 Matching Results
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Particulate matter chemistry and dynamics in the Twilight Zone at VERTIGO ALOHA and K2 Sites
Understanding particle dynamics in the 'Twilight Zone' is critical to prediction of the ocean's carbon cycle. As part of the VERTIGO (VERtical Transformations In the Global Ocean) project, this rarely sampled regime extending from the base of the euphotic layer to 1000 m, was characterized by double-paired day/night Multiple Unit Large Volume in-situ Filtration System (MULVFS) deployments and by {approx}100 high-frequency CTD/transmissometer/turbidity sensor profiles. VERTIGO studies lasting three weeks, contrasted oligotrophic station ALOHA (22.75{sup o}N 158{sup o}W), sampled in June-July 2004, with a biologically productive location (47{sup o}N 161{sup o}E) near station K2 in the Oyashio, occupied July-August 2005. Profiles of major and minor particulate components (C{sub org}, N, P, Ca, Si, Sr, Ba, Mn) in <1, 1-51, and >51 {micro}m size fractions, in-water optics, neutrally buoyant sediment trap (NBST) fluxes, and zooplankton data were intercompared. MULVFS total C{sub org} and C-Star particle beam attenuation coefficient (C{sub P}) were consistently related at both sites with a 27 {micro}M m{sup -1} conversion factor. 26 At K2, C{sub P} profiles further showed a multitude of transient spikes throughout the water column and spike abundance profiles closely paralleled the double peaked abundance profiles of zooplankton. Also at K2, copepods contributed {approx}40% and 10%, …
Date:
March 25, 2008
Creator:
Bishop, James K.B. & Wood, T.J.
Object Type:
Article
System:
The UNT Digital Library
Texas Jewish Post (Fort Worth, Tex.), Vol. 54, No. 21, Ed. 1 Thursday, May 25, 2000
Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 25, 2000
Creator:
Wisch, J. A. & Wisch, Rene
Object Type:
Newspaper
System:
The Portal to Texas History
Accelerating Polarized Protons to 250 GEV
The Relativistic Heavy Ion Collider (RHIC) as the first high energy polarized proton collider was designed t o provide polarized proton collisions a t a maximum beam energy of 250 GeV. I t has been providing collisions a t a beam energy of 100 Gel' since 2001. Equipped with two full Siberian snakes in each ring, polarization is preserved during the acceleration from injection to 100 GeV with careful control of the betatron tunes and the vertical orbit distortions. However, the intrinsic spin resonances beyond 100 GeV are about a factor of two stronger than those below 100 GeV? making it important t o examine the impact of these strong intrinsic spin resonances on polarization survival and the tolerance for vertical orbit distortions. Polarized protons were accelerated t o the record energy of 250 GeV in RHIC with a polarization of 46% measured a t top energy in 2006. The polarization measurement as a function of beam energy also shows some polarization loss around 136 GeV, the first strong intrinsic resonance above 100 GeV. This paper presents the results and discusses the sensitivity of the polarization survival t o orbit distortions.
Date:
June 25, 2007
Creator:
Bai, M.; Ahrens, L.; Alekseev, I. G.; Alessi, J.; Beebe-Wang, J. & AL., ET
Object Type:
Article
System:
The UNT Digital Library
A Survey of Hadron Therapy Accelerator Technologies.
Hadron therapy has entered a new age [1]. The number of facilities grows steadily, and 'consumer' interest is high. Some groups are working on new accelerator technology, while others optimize existing designs by reducing capital and operating costs, and improving performance. This paper surveys the current requirements and directions in accelerator technology for hadron therapy.
Date:
June 25, 2007
Creator:
Peggs, S.; Satogata, T. & Flanz, J.
Object Type:
Article
System:
The UNT Digital Library
Sensitivity analysis for joint inversion of ground-penetratingradar and thermal-hydrological data from a large-scale underground heatertest
We describe a joint inversion approach that combinesgeophysical and thermal-hydrological data for the estimation of (1)thermal-hydrological parameters (such as permeability, porosity, thermalconductivity, and parameters of the capillary pressure and relativepermeability functions) that are necessary for predicting the flow offluids and heat in fractured porous media, and (2) parameters of thepetrophysical function that relates water saturation, porosity andtemperature to the dielectric constant. The approach incorporates thecoupled simulation of nonisothermal multiphase fluid flow andground-penetrating radar (GPR) travel times within an optimizationframework. We discuss application of the approach to a large-scale insitu heater test which was conducted at Yucca Mountain, Nevada, to betterunderstand the coupled thermal, hydrological, mechanical, and chemicalprocesses that may occur in the fractured rock mass around a geologicrepository for high-level radioactive waste. We provide a description ofthe time-lapse geophysical data (i.e., cross-borehole ground-penetratingradar) and thermal-hydrological data (i.e., temperature and water contentdata) collected before and during the four-year heating phase of thetest, and analyze the sensitivity of the most relevantthermal-hydrological and petrophysical parameters to the available data.To demonstrate feasibility of the approach, and as a first step towardcomprehensive inversion of the heater test data, we apply the approach toestimate one parameter, the permeability of the rock matrix.
Date:
June 25, 2007
Creator:
Kowalsky, M. B.; Birkholzer, J.; Peterson, J.; Finsterle, S.; Mukhopadhya, Y. S. & Tsang, Y. T.
Object Type:
Article
System:
The UNT Digital Library
Novel QCD Phenomena at Electron-Proton Colliders
I discuss several novel phenomenological features of QCD which are observable in deep inelastic lepton-nucleon and lepton-nucleus scattering. Initial- and final-state interactions from gluon exchange, normally neglected in the parton model, have a profound effect on QCD hard-scattering reactions, leading to leading-twist single-spin asymmetries, the diffractive contribution to deep inelastic scattering, and the breakdown of the pQCD Lam-Tung relation in Drell-Yan reactions. Leading-twist diffractive processes in turn lead to nuclear shadowing and non-universal antishadowing--physics not incorporated in the light-front wavefunctions of the nucleus computed in isolation.
Date:
July 25, 2008
Creator:
Brodsky, Stanley J. & /SLAC /Durham U., IPPP
Object Type:
Article
System:
The UNT Digital Library
Evaluation of the TORE(R)Lance for Radioactive Waste Mobilization and Retrieval from Underground Storage Tanks
The TORE? Lance is a hand-held hydro transportation device with the ability to convey solids at pre-determined slurry concentrations over great distances. The TORE? Lance head generates a precessing vortex core to mobilize solids. Solids retrieval is accomplished using an eductor. The device contains no parts and requires pressurized fluid to operate the eductor and produce mobilization. Three configurations of TORE? Lance operation were evaluated for mobilization and eduction during these tests: compressed air, water, and an air and water mixture. These tests have shown that the TORE? Lance is a tool that can be used at Hanford for mobilization and retrieval of wastes. The system is versatile and can be configured for many types of applications. These studies showed that the diverse applications require unique solutions so care is recommended for TORE? Lance equipment selection for each application. The two components of the TORE? Lance are the precessing vortex for mobilizing and the eductor for retrieval. The precessing vortex is sensitive to fluid flow rate and pressure. In the hand-held unit these parameters are controlled both internally, by changing shim spacing, and externally by controlling the flow split between the eductor and the head. For in-tank applications out-of-tank control …
Date:
September 25, 2002
Creator:
Bamberger, Judith A.; Bates, Cameron J.; Bates, James M. & White, M.
Object Type:
Report
System:
The UNT Digital Library
Science & Technology Review November 2002
This months issue of Science and Technology Review has the following articles: (1) High-Tech Help for Fighting Wildfires--Commentary by Leland W. Younker; (2) This Model Can Take the Heat--A physics-based simulation program to combat wildfires combines the capabilities and resources of Lawrence Livermore and Los Alamos national laboratories. (3) The Best and the Brightest Come to Livermore--The Lawrence Fellowship Program attracts the most sought-after postdoctoral researchers to the Laboratory. (4) A view to Kill--Livermore sensors are aimed at the ''kill'' vehicle when it intercepts an incoming ballistic missile. (5) 50th Anniversary Highlight--Biological Research Evolves at Livermore--Livermore's biological research program keeps pace with emerging national issues, from studying the effects of ionizing radiation to detecting agents of biological warfare.
Date:
September 25, 2002
Creator:
Budil, K
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Lexington Leader (Lexington, Tex.), Vol. 11, No. 498, Ed. 1 Thursday, October 25, 2007
Weekly newspaper from Lexington, Texas that includes local, state, and national news along with advertising.
Date:
October 25, 2007
Creator:
Terrell, Cindy
Object Type:
Newspaper
System:
The Portal to Texas History
Characterization of Sediments from the Soil Desiccation Pilot Test (SDPT) Site in the BC Cribs and Trenches Area
This technical report documents the results of laboratory geochemical and hydrologic measurements of sediments collected from new borehole 299-E13-65 (C7047) and comparison of the results with those of nearby borehole 299-13E-62 (C5923) both drilled in the BC Cribs and Trenches Area. The total and water-leachable concentrations of key contaminants will be used to update contaminant-distribution conceptual models and to provide more data for improving baseline risk predictions and remedial alternative selections. Improved understanding of subsurface conditions and methods to remediate these principal contaminants can be also used to evaluate the application of specific technologies to other contaminants across the Hanford Site.
Date:
September 25, 2009
Creator:
Um, Wooyong; Truex, Michael J.; Valenta, Michelle M.; Iovin, Cristian; Kutnyakov, Igor V.; Chang, Hyun-shik et al.
Object Type:
Report
System:
The UNT Digital Library
Jewish Herald-Voice (Houston, Tex.), Vol. 100, No. 25, Ed. 1 Thursday, September 25, 2008
Weekly Jewish newspaper from Houston, Texas that includes local, state and national news along with extensive advertising.
Date:
September 25, 2008
Creator:
Samuels, Jeanne F.
Object Type:
Newspaper
System:
The Portal to Texas History
Port Aransas South Jetty (Port Aransas, Tex.), Vol. 37, No. 43, Ed. 1 Thursday, October 25, 2007
Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with extensive advertising.
Date:
October 25, 2007
Creator:
Judson, Mary Henkel
Object Type:
Newspaper
System:
The Portal to Texas History
Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 91, No. 32, Ed. 1 Wednesday, April 25, 2001
Semiweekly newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 25, 2001
Creator:
Gann, Sherry
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
59Fe(n,g)60Fe and 60Fe(n,g)61Fe Reaction Rates from Local Systematics
We present modeled neutron capture cross sections relevant to stellar production of {sup 60}Fe. Systematics for the input parameters required by the Hauser-Feshbach statistical model are developed based on measured data in the local region of the isotopic plane (20 {le} Z {le} 29, 43 {le} A {le} 65). These parameters and used to calculate reaction cross sections and rates for select target isotopes. Modeled cross sections are compared to experimental data where available. The {sup 59}Fe(n,{gamma}){sup 60}Fe and {sup 60}Fe(n, {gamma}){sup 61}Fe rates are compared to previous calculations. A brief discussion of errors related to the modeling is provided. We conclude by investigating the sensitivity of stellar production of {sup 26}Al and {sup 60}Fe to the {sup 59}Fe(n,{gamma}){sup 60}Fe and {sup 60}Fe(n,{gamma})61Fe reaction rates using a single zone model.
Date:
April 25, 2005
Creator:
Kelley, K; Hoffman, R D & Drake, M
Object Type:
Report
System:
The UNT Digital Library
Port Aransas South Jetty (Port Aransas, Tex.), Vol. 37, No. 4, Ed. 1 Thursday, January 25, 2007
Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with extensive advertising.
Date:
January 25, 2007
Creator:
Judson, Mary Henkel
Object Type:
Newspaper
System:
The Portal to Texas History
Temporary shelter-in-place as protection against a release of airborne hazardous material : report of a literature search.
''Temporary shelter-in place'' is the combination of prompt shelter-in-place (SIP) to minimize initial exposure to airborne hazardous material, followed by timely action to terminate this protection to minimize exposure to hazardous vapor accumulations in the shelter once the air outside becomes less hazardous than the air inside the shelter. Temporary SIP, if properly executed, is considered to be an effective way to protect populations from hazardous chemical vapors, especially from high concentrations for short periods. This is supported by laboratory and field experiments. The need for timely termination of temporary SIP as protection from infiltrated vapors is an integral component of a temporary SIP strategy. It was from this premise that Argonne National Laboratory (ANL) was asked to develop methodologies for deciding when and how to terminate SIP. These methodologies, in turn, could be the basis for site-specific operational guidelines (e.g., decision matrix, decision-tree, or algorithm) for terminating SIP on each of the eight Army chemical stockpile storage sites, and in the off-post communities surrounding them. This project consists of two tasks. Task 1 was to collect and analyze existing literature that might be relevant to the termination of temporary SIP. This report is the product of Task 1. Task …
Date:
February 25, 2002
Creator:
Yantosik, G. D.; Lerner, K. & Maloney, D. M.
Object Type:
Report
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 92, No. 21, Ed. 1 Thursday, May 25, 2000
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
May 25, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Tulia Herald (Tulia, Tex.), Vol. 93, No. 4, Ed. 1 Thursday, January 25, 2001
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
January 25, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Stamford American (Stamford, Tex.), Vol. 81, No. 32, Ed. 1 Thursday, October 25, 2001
Weekly newspaper from Stamford, Texas that includes local, state, and national news along with advertising.
Date:
October 25, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 125, No. 7, Ed. 1 Thursday, January 25, 2007
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
January 25, 2007
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean Herald (Rusk, Tex.), Vol. 159, No. 18, Ed. 1 Wednesday, June 25, 2008
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
June 25, 2008
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
The Optimist (Abilene, Tex.), Vol. 94, No. 30, Ed. 1, Wednesday, January 25, 2006
Weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
January 25, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Electra Star-News (Electra, Tex.), Vol. 102, No. 12, Ed. 1 Thursday, October 25, 2007
Weekly newspaper from Electra, Texas that includes local, state, and national news along with advertising.
Date:
October 25, 2007
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Hudspeth County Herald and Dell Valley Review (Dell City, Tex.), Vol. 54, No. 6, Ed. 1 Friday, December 25, 2009
Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.
Date:
December 25, 2009
Creator:
Stuart, Andrew
Object Type:
Newspaper
System:
The Portal to Texas History