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Acoustic Monitor for Liquid-Solid Slurries Measurements at Low Weight Fractions
The principle objective of the project was to develop an acoustic probe for determining the weight fraction of particles in a flowing suspension. The suspension can be solid-liquid (S-L) or solid-gas-liquid (S-G-L). The work accomplished during the first three years of DOE funding was devoted to the development of a rigorous theory for acoustic wave propagation through solid-liquid (S-L) and solid-gas-liquid (S-G-L). In the first funding period we developed an acoustic probe for S-G-L suspensions that has resulted in a theory, supported by our experiments, to describe small amplitude acoustic wave propagations in dilute suspensions (Norato, 1999; Spelter al., 1999, 2001: Norato et al. 2002). The theory agrees well with experimental data of sound attenuation over a wide range of particle sizes, frequencies, and weight percent solids. We have also completed theoretical and experimental investigation on the effect of entrained gas bubbles on the attenuation. This analysis permits us to determine the S-L weight percent in the presence of bubbles.
Date:
December 8, 2004
Creator:
Tavlarides, Dr. L.L. & Sangan, Dr. A.S.
Object Type:
Report
System:
The UNT Digital Library
Agricultural Biotechnology: Overview and Selected Issues
This report considers the issues surrounding genetically engineered (GE) crops or GMO's (genetically modified organisms). Moreover, the report debates the consequences of GE crops on the environment, food safety, and labeling. The report also debates the merits of regulation on the market the crops have entered.
Date:
December 8, 2004
Creator:
Johnson, Barbara A.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 106, No. 208, Ed. 1 Wednesday, December 8, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 8, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, December 8, 2004
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
December 8, 2004
Creator:
Schwind, Jim & Looby, Edward
Object Type:
Newspaper
System:
The Portal to Texas History
Amendment Process in the Committee of the Whole
This report describes the amendment process in the Committee of the Whole, including reading for an amendment, debating, amendment trees, and voting.
Date:
December 8, 2004
Creator:
Schneider, Judy
Object Type:
Report
System:
The UNT Digital Library
Analysis of TPV Network Losses (a Presentation)
This talk focuses on the theoretical analysis of electrical losses associated with electrically networking large numbers of TPV cells to produce high power TPV power generators.
Date:
December 8, 2004
Creator:
DePoy, DM; Dashiell, MW; Rahner, DD; Danielson, LR; Oppenlander, JE; Vell, JL et al.
Object Type:
Article
System:
The UNT Digital Library
The Archer Advocate (Holliday, Tex.), Vol. 2, No. 36, Ed. 1 Wednesday, December 8, 2004
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
December 8, 2004
Creator:
Thomas, John
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 84, No. 3, Ed. 1 Wednesday, December 8, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 8, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Cherokeean Herald (Rusk, Tex.), Vol. 155, No. 42, Ed. 1 Wednesday, December 8, 2004
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
December 8, 2004
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
The Colony Courier-Leader (The Colony, Tex.), Vol. 23, No. 44, Ed. 1 Wednesday, December 8, 2004
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
December 8, 2004
Creator:
Sorter, Dave
Object Type:
Newspaper
System:
The Portal to Texas History
Country-of-Origin Labeling for Foods
This report details the information related to country-of-origin information on fresh fruits and vegetables, red meats, seafood, and peanuts. The contents include the background, meat, and poultry inspection provisions, history of Congressional Action for the implementation
Date:
December 8, 2004
Creator:
Becker, Geoffrey S.
Object Type:
Report
System:
The UNT Digital Library
The Cuero Record (Cuero, Tex.), Vol. 110, No. 49, Ed. 1 Wednesday, December 8, 2004
Weekly newspaper from Cuero, Texas that includes local, state, and national news along with advertising.
Date:
December 8, 2004
Creator:
Rea, Glenn
Object Type:
Newspaper
System:
The Portal to Texas History
Deterministic, Nanoscale Fabrication of Mesoscale Objects
Neither LLNL nor any other organization has the capability to perform deterministic fabrication of mm-sized objects with arbitrary, {micro}m-sized, 3-D features and with 100-nm-scale accuracy and smoothness. This is particularly true for materials such as high explosives and low-density aerogels, as well as materials such as diamond and vanadium. The motivation for this project was to investigate the physics and chemistry that control the interactions of solid surfaces with laser beams and ion beams, with a view towards their applicability to the desired deterministic fabrication processes. As part of this LDRD project, one of our goals was to advance the state of the art for experimental work, but, in order to create ultimately a deterministic capability for such precision micromachining, another goal was to form a new modeling/simulation capability that could also extend the state of the art in this field. We have achieved both goals. In this project, we have, for the first time, combined a 1-D hydrocode (''HYADES'') with a 3-D molecular dynamics simulator (''MDCASK'') in our modeling studies. In FY02 and FY03, we investigated the ablation/surface-modification processes that occur on copper, gold, and nickel substrates with the use of sub-ps laser pulses. In FY04, we investigated laser …
Date:
December 8, 2004
Creator:
Mariella, R., Jr.; Gilmer, J.; Rubenchik, A. & Shirk, M.
Object Type:
Report
System:
The UNT Digital Library
[Email from Caro Bosca, Dec. 8, 2004]
Email letter-head from Caro Bosca that includes all the email addresses the unattached message was sent to.
Date:
December 8, 2004
Creator:
Bosca, Caro Bayley
Object Type:
Letter
System:
The Portal to Texas History
Environmental Provisions in Surface Transportation Reauthorization Legislation Proposed During the 108th Congress
This report discusses significant legislative provisions regarding environmental issues in bills, passed by both the House and Senate during the 108th Congress, that the 108th Congress, that would have reauthorized surface transportation programs for FY2004-FY2009.
Date:
December 8, 2004
Creator:
Luther, Linda G.
Object Type:
Report
System:
The UNT Digital Library
Evidence for neutrino mass: A decade of discovery
Neutrino mass and mixing are amongst the major discoveries of recent years. From the observation of flavor change in solar and atmospheric neutrino experiments to the measurements of neutrino mixing with terrestrial neutrinos, recent experiments have provided consistent and compelling evidence for the mixing of massive neutrinos. The discoveries at Super-Kamiokande, SNO, and KamLAND have solved the long-standing solar neutrino problem and demand that we make the first significant revision of the Standard Model in decades. Searches for neutrinoless double-beta decay probe the particle nature of neutrinos and continue to place limits on the effective mass of the neutrino. Possible signs of neutrinoless double-beta decay will stimulate neutrino mass searches in the next decade and beyond. I review the recent discoveries in neutrino physics and the current evidence for massive neutrinos.
Date:
December 8, 2004
Creator:
Heeger, Karsten M.
Object Type:
Article
System:
The UNT Digital Library
Exploiting a Transmission Grating Spectrometer
The availability of compact transmission grating spectrometers now allows an attractive and economical alternative to the more familiar Czerny-Turner configuration for many high-temperature plasma applications. Higher throughput is obtained with short focal length refractive optics and stigmatic imaging. Many more spectra can be obtained with a single spectrometer since smaller, more densely packed optical input fibers can be used. Multiple input slits, along with a bandpass filter, can be used to maximize the number of spectra per detector, providing further economy. Curved slits can correct for the strong image curvature of the short focal length optics. Presented here are the governing grating equations for both standard and high-dispersion transmission gratings, defining dispersion, image curvature, and desired slit curvature, that can be used in the design of improved plasma diagnostics.
Date:
December 8, 2004
Creator:
Bell, Ronald E.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, December 8, 2004
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 8, 2004
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Formation of GEMS from shock-accelerated crystalline dust in Superbubbles
Interplanetary dust particles (IDPs) contain enigmatic sub-micron components called GEMS (Glass with Embedded Metal and Sulfides). The compositions and structures of GEMS indicate that they have been processed by exposure to ionizing radiation but details of the actual irradiation environment(s) have remained elusive. Here we propose a mechanism and astrophysical site for GEMS formation that explains for the first time the following key properties of GEMS; they are stoichiometrically enriched in oxygen and systematically depleted in S, Mg, Ca and Fe (relative to solar abundances), most have normal (solar) oxygen isotopic compositions, they exhibit a strikingly narrow size distribution (0.1-0.5 {micro}m diameter), and some of them contain ''relict'' crystals within their silicate glass matrices. We show that the compositions, size distribution, and survival of relict crystals are inconsistent with amorphization by particles accelerated by diffusive shock acceleration. Instead, we propose that GEMS are formed from crystalline grains that condense in stellar outflows from massive stars in OB associations, are accelerated in encounters with frequent supernova shocks inside the associated superbubble, and are implanted with atoms from the hot gas in the SB interior. We thus reverse the usual roles of target and projectile. Rather than being bombarded at rest by …
Date:
December 8, 2004
Creator:
Westphal, A & Bradley, J P
Object Type:
Article
System:
The UNT Digital Library
Fourier transform infrared spectroscopy studies of water-polymer interactions in chemically amplified photoresists
Fourier-Transform Infrared (FTIR) absorption spectroscopy is implemented to measure the infrared spectrum of water absorbed by the Poly(t-butoxycarbonylstyrene) (tBOC) and the ketal-protected Poly(hydroxystyrene) (KRS-XE) polymer photoresists. The shape and intensity of the OH stretching band of the water spectrum is monitored in a variety of humidity conditions in order to obtain information on the hydrogen-bonding interactions between the water and the polymer chains. The band is deconvoluted into four sub-bands, which represent four types of water molecules in different environments. Because of the hydrophilicity of the polymers studied, a large portion of the sorbed water molecules is believed to be strongly bound to the polar sites of the polymer. The ratios of each type of water are found to be dependent on the humidity conditions to which the sample was exposed. At higher humidities, there is an increase in the fraction of free and weakly-bound water molecules. These findings are used to explain the humidity dependence of the deprotection reaction rates, since certain types of water may slow transport of reactive species within the polymer network.
Date:
December 8, 2004
Creator:
McDonough, Laurie A.; Chikan, Viktor; Kim, Zee Hwan; Leone, Stephen R. & Hinsberg, William D.
Object Type:
Article
System:
The UNT Digital Library
[Funeral Program for Birda Florence Crunk, December 8, 2004]
Funeral program for Sister Birda Florence Crunk, born October 3, 1916 and died December 5, 2004. The funeral was held December 8, 2004 at Second Baptist Church, officiated by Rev. Robert L. Jemerson. Funeral arrangements were made through Sutton-Sutton Mortuary Inc. and she was buried in Southern Memorial Park in San Antonio, Texas.
Date:
December 8, 2004
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 109, No. 22, Ed. 1 Wednesday, December 8, 2004
Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date:
December 8, 2004
Creator:
Bridges, G. Frank & Bridges, Georgie
Object Type:
Newspaper
System:
The Portal to Texas History
Guide to Individuals Seated on the House Dais
This report provides information about the Guide to Individuals Seated on the House Dais. The house of representatives meets in the capitol in the house chamber.
Date:
December 8, 2004
Creator:
Amer, Mildred
Object Type:
Report
System:
The UNT Digital Library
Helical rays in two-dimensional resonant wave conversion
The process of resonant wave conversion (often called linear mode conversion) has traditionally been analyzed with a spatially one-dimensional slab model, for which the rays propagate in a two-dimensional phase space. However, it has recently been shown [E.R. Tracy and A.N. Kaufman, Phys. Rev. Lett. 91, 130402 (2003)] that multidimensional rays have a helical structure for conversion in two or more spatial dimensions (if their dispersion matrix is generic). In that case, a one-dimensional model is inadequate; a correct analysis requires two spatial dimensions and, thus, four-dimensional phase space. In this paper we show that a cold plasma model will exhibit ray helicity in conversion regions where the density and magnetic field gradients are significantly non-parallel. For illustration, we examine a model of the poloidal plane of a deuterium-tritium tokamak plasma, and identify such a region. In this region, characterized by a six-sector topology, rays in the sector for incident and reflected magnetosonic waves exhibit significant helicity. We introduce a ''symmetric-wedge'' model, to develop a detailed analytic and numerical study of helical rays in this sector.
Date:
December 8, 2004
Creator:
Kaufman, Allan N.; Tracy, Eugene R. & Brizard, Alain J.
Object Type:
Article
System:
The UNT Digital Library