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Master's Recital: 2009-03-02 - Donald Malpass, flute
Access:
Use of this item is restricted to the UNT Community
A recital presented at the UNT College of Music Concert Hall in partial fulfillment of the degree Master of Music in Performance.
Date:
March 2, 2009
Creator:
Malpass, Donald
Object Type:
Sound
System:
The UNT Digital Library
Measurement of quasi-ballistic heat transport across nanoscale interfaces using ultrafast coherent soft x-ray beams
Understanding heat transport on nanoscale dimensions is important for fundamental advances in nanoscience, as well as for practical applications such as thermal management in nano-electronics, thermoelectric devices, photovoltaics, nanomanufacturing, as well as nanoparticle thermal therapy. Here we report the first time-resolved measurements of heat transport across nanostructured interfaces. We observe the transition from a diffusive to a ballistic thermal transport regime, with a corresponding increase in the interface resistivity for line widths smaller than the phonon mean free path in the substrate. Resistivities more than three times higher than the bulk value are measured for the smallest line widths of 65 nm. Our findings are relevant to the modeling and design of heat transport in nanoscale engineered systems, including nanoelectronics, photovoltaics and thermoelectric devices.
Date:
March 2, 2009
Creator:
Siemens, M.; Li, Q.; Yang, R.; Nelson, K.; Anderson, E.; Murnane, M. et al.
Object Type:
Article
System:
The UNT Digital Library
NASA: Assessments of Selected Large-Scale Projects
Other written product issued by the Government Accountability Office with an abstract that begins "The National Aeronautics and Space Administration (NASA) plans to invest billions in the coming years in science and exploration space fl ight initiatives. The scientifi c and technical complexities inherent in NASA's mission create great challenges in managing its projects and controlling costs. In the past, NASA has had diffi culty meeting cost, schedule, and performance objectives for some of its projects. The need to effectively manage projects will gain even more importance as NASA seeks to manage its wide-ranging portfolio in an increasingly constrained fiscal environment. Per congressional direction, this report provides an independent assessment of selected NASA projects. In conducting this work, GAO compared projects against best practice criteria for system development including attainment of knowledge on technologies and design as well as various aspects of program management. The projects assessed are considered major acquisitions by NASA--each with a life-cycle cost of over $250 million. No recommendations are provided."
Date:
March 2, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Nuclear Weapons: NNSA and DOD Need to More Effectively Manage the Stockpile Life Extension Program
A letter report issued by the Government Accountability Office with an abstract that begins "As a separately organized agency within the Department of Energy, the National Nuclear Security Administration (NNSA) administers the Stockpile Life Extension Program, whose purpose is to extend, through refurbishment, the operational lives of the weapons in the nuclear stockpile. NNSA encountered significant management problems with its first refurbishment for the W87 warhead. GAO was asked to assess the extent to which NNSA and the Department of Defense (DOD) have effectively managed the refurbishment of two other weapons--the B61 bomb and the W76 warhead. This report summarizes the findings of GAO's classified report on the refurbishment of the B61 bomb and W76 warhead."
Date:
March 2, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Observation of Two-source Interference in the Photoproduction Reaction AuAu --> AuAu rho 0
In ultra-peripheral relativistic heavy-ion collisions, a photon from the electromagnetic field of one nucleus can fluctuate to a quark-antiquark pair and scatter from the other nucleus, emerging as a {rho}{sup 0}. The {rho}{sup 0} production occurs in two well-separated (median impact parameters of 20 and 40 fermi for the cases considered here) nuclei, so the system forms a 2-source interferometer. At low transverse momenta, the two amplitudes interfere destructively, suppressing {rho}{sup 0} production. Since the {rho}{sup 0} decays before the production amplitudes from the two sources can overlap, the two-pion system can only be described with an entangled non-local wave function, and is thus an example of the Einstein-Podolsky-Rosen paradox. We observe this suppression in 200 GeV per nucleon-pair gold-gold collisions. The interference is 87% {+-} 5%(stat.) {+-} 8% (syst.) of the expected level. This translates into a limit on decoherence due to wave function collapse or other factors, of 23% at the 90% confidence level.
Date:
March 2, 2009
Creator:
STAR Collaboration
Object Type:
Article
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 94, No. 106, Ed. 1 Monday, March 2, 2009
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 2, 2009
Creator:
Simons, Meredith
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Oral History Interview with Raymundo Martinez, March 2, 2009
The National Museum of the Pacific War presents an interview with Raymundo Martinez. Martinez was drafted in the Army in November of 1941. He served as a Technical Sergeant in the 807th Engineer Battalion for four years. From 1942 to 1944 Martinez was assigned to the Aleutian Islands. During this time, he recalls much combat, casualties, preparing graves for fallen soldiers and a Japanese plane being gunned down during a dog fight. He was then assigned to Hawaii and provides some details of life on the island. From May to September of 1945 his unit served on Okinawa, which he provides vivid details of his experiences. He was discharged in November of 1945.
Date:
March 2, 2009
Creator:
Martinez, Raymundo
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Raymundo Martinez, March 2, 2009
The National Museum of the Pacific War presents an interview with Raymundo Martinez. Martinez was drafted in the Army in November of 1941. He served as a Technical Sergeant in the 807th Engineer Battalion for four years. From 1942 to 1944 Martinez was assigned to the Aleutian Islands. During this time, he recalls much combat, casualties, preparing graves for fallen soldiers and a Japanese plane being gunned down during a dog fight. He was then assigned to Hawaii and provides some details of life on the island. From May to September of 1945 his unit served on Okinawa, which he provides vivid details of his experiences. He was discharged in November of 1945.
Date:
March 2, 2009
Creator:
Martinez, Raymundo
Object Type:
Text
System:
The Portal to Texas History
Particle-In-Cell/Monte Carlo Simulation of Ion Back Bombardment in Photoinjectors
In this paper, we report on studies of ion back bombardment in high average current dc and rf photoinjectors using a particle-in-cell/Monte Carlo method. Using H{sub 2} ion as an example, we observed that the ion density and energy deposition on the photocathode in rf guns are order of magnitude lower than that in a dc gun. A higher rf frequency helps mitigate the ion back bombardment of the cathode in rf guns.
Date:
March 2, 2009
Creator:
Qiang, Ji; Corlett, John & Staples, John
Object Type:
Article
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 94, No. 143, Ed. 1 Monday, March 2, 2009
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 2, 2009
Creator:
Shance, Brenda
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Spawning Habitat Studies of Hanford Reach Fall Chinook Salmon (Oncorhynchus tshawytscha), Final Report.
The Pacific Northwest National Laboratory conducted this study for the Bonneville Power Administration (BPA) with funding provided through the Northwest Power and Conservation Council(a) and the BPA Fish and Wildlife Program. The study was conducted in the Hanford Reach of the Columbia River. The goal of study was to determine the physical habitat factors necessary to define the redd capacity of fall Chinook salmon that spawn in large mainstem rivers like the Hanford Reach and Snake River. The study was originally commissioned in FY 1994 and then recommissioned in FY 2000 through the Fish and Wildlife Program rolling review of the Columbia River Basin projects. The work described in this report covers the period from 1994 through 2004; however, the majority of the information comes from the last four years of the study (2000 through 2004). Results from the work conducted from 1994 to 2000 were covered in an earlier report. More than any other stock of Pacific salmon, fall Chinook salmon (Oncorhynchus tshawytscha) have suffered severe impacts from the hydroelectric development in the Columbia River Basin. Fall Chinook salmon rely heavily on mainstem habitats for all phases of their life cycle, and mainstem hydroelectric dams have inundated or blocked …
Date:
March 2, 2009
Creator:
Geist, David R.; Arntzen, Evan V. & Chien, Yi-Ju (Pacific Northwest National Laboratory)
Object Type:
Report
System:
The UNT Digital Library
Sub-10 nm Platinum Nanocrystals with Size and Shape Control: Catalytic Study for Ethylene and Pyrrole Hydrogenation
Platinum nanocubes and nanopolyhedra with tunable size from 5 to 9 nm were synthesized by controlling the reducing rate of metal precursor ions in a one-pot polyol synthesis. A two-stage process is proposed for the simultaneous control of size and shape. In the first stage, the oxidation state of the metal ion precursors determined the nucleation rate and consequently the number of nuclei. The reaction temperature controlled the shape in the second stage by regulation of the growth kinetics. These well-defined nanocrystals were loaded into MCF-17 mesoporous silica for examination of catalytic properties. Pt loadings and dispersions of the supported catalysts were determined by elemental analysis (ICP-MS) and H2 chemisorption isotherms, respectively. Ethylene hydrogenation rates over the Pt nanocrystals were independent of both size and shape and comparable to Pt single crystals. For pyrrole hydrogenation, the nanocubes enhanced ring-opening ability and thus showed a higher selectivity to n-butylamine as compared to nanopolyhedra.
Date:
March 2, 2009
Creator:
Tsung, Chia-Kuang; Kuhn, John N.; Huang, Wenyu; Aliaga, Cesar; Hung, Ling-I; Somorjai, Gabor A. et al.
Object Type:
Article
System:
The UNT Digital Library
Sweetwater Reporter (Sweetwater, Tex.), Vol. 111, No. 90, Ed. 1 Monday, March 2, 2009
Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date:
March 2, 2009
Creator:
Rodriguez, Tatiana
Object Type:
Newspaper
System:
The Portal to Texas History
The Technology Innovation Program
This report discusses the Technology Innovation Program (TIP) at the National Institute of Standards and Technology (NIST), which is designed "to support, promote, and accelerate innovation in the United States through high-risk, high-reward research in areas of critical national need," according to the authorizing legislation. Grants are provided to small and medium-sized firms for individual projects or joint ventures with other research organizations.
Date:
March 2, 2009
Creator:
Schacht, Wendy H.
Object Type:
Report
System:
The UNT Digital Library
Technology Transfer: Use of Federally Funded Research and Development
This report discusses the federal use of technology transfer, a process by which technology developed in one organization, in one area, or for one purpose is applied in another organization, in another area, or for another purpose.
Date:
March 2, 2009
Creator:
Schacht, Wendy H.
Object Type:
Report
System:
The UNT Digital Library
Unauthorized Employment in the United States: Issues, Options, and Legislation
As immigration reform and the illegal alien population have gained congressional and public attention in the past several years, the issue of unauthorized employment has come to the fore. It is widely accepted that most unauthorized aliens enter and remain in the United States in order to work. This report discusses options for addressing the issue of unauthorized employment in the United States.
Date:
March 2, 2009
Creator:
Bruno, Andorra
Object Type:
Report
System:
The UNT Digital Library
X-ray Emission Spectroscopy to Study Ligand Valence Orbitals in Mn Coordination Complexes
We discuss a spectroscopic method to determine the character of chemical bonding and for the identification of metal ligands in coordination and bioinorganic chemistry. It is based on the analysis of satellite lines in X-ray emission spectra that arise from transitions between valence orbitals and the metal ion 1s level (valence-to-core XES). The spectra, in connection with calculations based on density functional theory (DFT), provide information that is complementary to other spectroscopic techniques, in particular X-ray absorption (XANES and EXAFS). The spectral shape is sensitive to protonation of ligands and allows ligands, which differ only slightly in atomic number (e.g., C, N, O...), to be distinguished. A theoretical discussion of the main spectral features is presented in terms of molecular orbitals for a series of Mn model systems: [Mn(H2O)6]2+, [Mn(H2O)5OH]+, [Mn(H2O)5NH2]+, and [Mn(H2O)5NH3]2+. An application of the method, with comparison between theory and experiment, is presented for the solvated Mn2+ ion in water and three Mn coordination complexes, namely [LMn(acac)N3]BPh4, [LMn(B2O3Ph2)(ClO4)], and [LMn(acac)N]BPh4, where L represents 1,4,7-trimethyl-1,4,7-triazacyclononane, acac stands for the 2,4-pentanedionate anion, and B2O3Ph2 represents the 1,3-diphenyl-1,3-dibora-2-oxapropane-1,3-diolato dianion.
Date:
March 2, 2009
Creator:
Smolentsev, Grigory; Soldatov, Alexander V; Messinger, Johannes; Merz, Kathrin; Weyhermuller, Thomas; Bergmann, Uwe et al.
Object Type:
Article
System:
The UNT Digital Library
Aerosols and clouds in chemical transport models and climate models.
Clouds exert major influences on both shortwave and longwave radiation as well as on the hydrological cycle. Accurate representation of clouds in climate models is a major unsolved problem because of high sensitivity of radiation and hydrology to cloud properties and processes, incomplete understanding of these processes, and the wide range of length scales over which these processes occur. Small changes in the amount, altitude, physical thickness, and/or microphysical properties of clouds due to human influences can exert changes in Earth's radiation budget that are comparable to the radiative forcing by anthropogenic greenhouse gases, thus either partly offsetting or enhancing the warming due to these gases. Because clouds form on aerosol particles, changes in the amount and/or composition of aerosols affect clouds in a variety of ways. The forcing of the radiation balance due to aerosol-cloud interactions (indirect aerosol effect) has large uncertainties because a variety of important processes are not well understood precluding their accurate representation in models.
Date:
March 2, 2008
Creator:
Lohmann,U. & Schwartz, S. E.
Object Type:
Article
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 109, No. 234, Ed. 1 Sunday, March 2, 2008
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 2, 2008
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 88, No. 62, Ed. 1 Sunday, March 2, 2008
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
March 2, 2008
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
Burleson Star (Burleson, Tex.), Vol. 43, No. 45, Ed. 1 Sunday, March 2, 2008
Semiweekly newspaper from Burleson, Texas that includes local, state, and national news along with advertising.
Date:
March 2, 2008
Creator:
Rayburn, Michael
Object Type:
Newspaper
System:
The Portal to Texas History
The Express-Star (Chickasha, Okla.), Ed. 1 Sunday, March 2, 2008
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 2, 2008
Creator:
Wilson, Chris
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Master's Recital: 2008-03-02 - Rebecca Douglas, viola
Access:
Use of this item is restricted to the UNT Community
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.
Date:
March 2, 2008
Creator:
Douglas, Rebecca
Object Type:
Sound
System:
The UNT Digital Library
The Message, Volume 43, Number 13, March 2008
Newsletter of Congregation Beth Yeshurun in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants.
Date:
March 2, 2008
Creator:
Congregation Beth Yeshurun (Houston, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History