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Using measured equipment load profiles to 'right-size' HVACsystems and reduce energy use in laboratory buildings (Pt. 2)

Description: There is a general paucity of measured equipment load datafor laboratories and other complex buildings and designers often useestimates based on nameplate rated data or design assumptions from priorprojects. Consequently, peak equipment loads are frequentlyoverestimated, and load variation across laboratory spaces within abuilding is typically underestimated. This results in two design flaws.Firstly, the overestimation of peak equipment loads results in over-sizedHVAC systems, increasing initia… more
Date: June 29, 2005
Creator: Mathew, Paul; Greenberg, Steve; Frenze, David; Morehead, Michael; Sartor, Dale & Starr, William
Partner: UNT Libraries Government Documents Department
open access

Surface Specularity as an Indicator of Shock-Induced Solid-Liquid Phase Transitions

Description: When highly polished metal surfaces melt upon release after shock loading, they exhibit a number of features that suggest that significant surface changes accompany the phase transition. The reflection of light from such surfaces changes from specular (pre-shock) to diffuse upon melting. A familiar manifestation of this phenomenon is the loss of signal light in velocimetric measurements typically observed above pressures high enough to melt the free-surface. Unlike many other potential material… more
Date: June 29, 2007
Creator: Gerald Stevens, Stephen Lutz, William Turley, Lynn Veeser
Partner: UNT Libraries Government Documents Department
open access

Shape transitions in neutron-rich Ru isotopes: spectroscopy of 109,110,111,112Ru

Description: The spectroscopy of neutron-rich {sup 109,110,111,112}Ru nuclei was studied by measuring the prompt {gamma} rays originated from fission fragments, produced by the {sup 238}U({alpha},f) fusion-fission reaction, in coincidence with the detection of both fragments. For {sup 109,111}Ru, both the negative-parity (h{sub 11/2} orbitals) and positive-parity (g{sub 7/2} and/or d{sub 5/2} orbitals) bands were extended to substantially higher spin and excitation energy than known previously. The ground-s… more
Date: June 29, 2005
Creator: Hua, H.; Cline, D.; Hayes, A. B.; Teng, R.; Riley, D.; Clark, R. M. et al.
Partner: UNT Libraries Government Documents Department
open access

Poroelastic modeling of seismic boundary conditions across afracture

Description: A fracture within a porous background is modeled as a thin porous layer with increased compliance and finite permeability. For small layer thickness, a set of boundary conditions can be derived that relate particle velocity and stress across a fracture, induced by incident poroelastic waves. These boundary conditions are given via phenomenological parameters that can be used to examine and characterize the seismic response of a fracture. One of these parameters, here it is called membrane perme… more
Date: June 29, 2006
Creator: Schoenberg, M.A. & Nakagawa, S.
Partner: UNT Libraries Government Documents Department
open access

Residential implementation of critical-peak pricing ofelectricity

Description: This paper investigates how critical-peak pricing (CPP)affects households with different usage and income levels, with the goalof informing policy makers who are considering the implementation of CPPtariffs in the residential sector. Using a subset of data from theCalifornia Statewide Pricing Pilot of 2003-2004, average load changeduring summer events, annual percent bill change, and post-experimentsatisfaction ratings are calculated across six customer segments,categorized by historical usage … more
Date: June 29, 2006
Creator: Herter, Karen
Partner: UNT Libraries Government Documents Department
open access

Modelling of e-cloud build-up in grooved vacuum chambers usingPOSINST

Description: Use of grooved vacuum chambers have been suggested as a wayto limitelectron cloud accumulation in the ILC-DR. We report onsimulations carried out using an augmented version of POSINST, accountingfor e-cloud dynamics in the presence of grooves, and make contact withprevious estimates of an effective secondary electron yield for groovedsurfaces.
Date: June 29, 2007
Creator: Venturini, Marco; Celata, C.; Furman, Miguel; Vay, Jean-Luc & Pivi, Mauro
Partner: UNT Libraries Government Documents Department
open access

In situ laser heating and radial synchrotron X-ray diffraction ina diamond anvil cell

Description: We report a first combination of diamond anvil cell radialx-ray diffraction with in situ laser heating. The laser-heating setup ofALS beamline 12.2.2 was modified to allow one-sided heating of a samplein a diamond anvil cell with an 80 W yttrium lithium fluoride laser whileprobing the sample with radial x-ray diffraction. The diamond anvil cellis placed with its compressional axis vertical, and perpendicular to thebeam. The laser beam is focused onto the sample from the top while thesample is p… more
Date: June 29, 2007
Creator: Kunz, Martin; Caldwell, Wendel A.; Miyagi, Lowell & Wenk,Hans-Rudolf
Partner: UNT Libraries Government Documents Department
open access

Calibration of symmetric and non-symmetric errors for interferometry of ultra-precise imaging systems

Description: The azimuthal Zernike coefficients for shells of Zernike functions with shell numbers n<N may be determined by making measurements at N equally spaced rotational positions. However, these measurements do not determine the coefficients of any of the purely radial Zernike functions. Label the circle that the azimuthal Zernikes are measured in as circle A. Suppose that the azimuthal Zernike coefficients for n<N are also measured in a smaller circle B which is inside circle A but offset so th… more
Date: June 29, 2005
Creator: Phillion, D. W.; Sommargren, G. E.; Johnson, M. A.; Decker, T. A.; Taylor, J. S.; Gomie, Y et al.
Partner: UNT Libraries Government Documents Department
open access

Impedance and Single Bunch Instability Calculations for the ILCDamping Ring

Description: An important action item for the damping rings of theInternational Linear Collider (ILC) is to compute the broad-bandimpedance and, from it, the threshold to the microwave instability. Wereport on the status of our study and provide a preliminary estimate ofthe instability threshold based on impedance models developed sofar.
Date: June 29, 2007
Creator: Venturini, Marco; Bane, Karl; Heifets, Sam; Li, Zhenhai; Ng, Cho; Novokhatski, Alexander et al.
Partner: UNT Libraries Government Documents Department
open access

[Newspaper article: AIDS, The State of the Science]

Description: A special report from the Dallas Morning News defining, describing, and providing the history of AIDS.
Date: June 29, 1987
Creator: The Dallas Morning News
Partner: UNT Libraries Special Collections
open access

A logic flowgraph based concept for decision support and management of nuclear plant operation

Description: In the US the evolution of automated decision support tools for plant operators has spanned from ''event-oriented'' diagnostic systems to ''symptom-oriented'' computer-based emergency operating procedures. A problem common to both kind of systems is in the initial level of effort required for development of the associated models and software. In the following we will discuss some of the general issues that arise in the development and application of these decision-support systems. We will also … more
Date: June 29, 1987
Creator: Guarro, S. B.
Partner: UNT Libraries Government Documents Department
open access

SOUDAN 2 nuclear decay experiment. Progress report

Description: Construction of the experiment cavern on the 27th level of the SOUDAN iron mine in northern Minnesota began early this year and will be complete early in 1985. The first 1200 tons of the detector itself is also under construction in the US and UK; installation will begin in mid 1985. Physics exploitation will begin early in 1986 and the first 1200 ton module will be complete early in 1987. The detector may be expanded to between 3 and 5 such modules in the cavern. The detector is an iron tracki… more
Date: June 29, 1984
Creator: Minnesota; Argonne; Oxford; Rutherford & Collaboration, Tufts
Partner: UNT Libraries Government Documents Department
open access

Electronic excitation and ion source optimization

Description: The electronic excitation cross sections leading to H/sub 2/(v'') molecules are discussed. The effect of shortening the length of the first chamber of a tandem configuration for the purpose of reducing the atomic concentration is shown to enhance the extracted current density.
Date: June 29, 1987
Creator: Hiskes, J.R. & Lietzke, A.F.
Partner: UNT Libraries Government Documents Department
open access

Hydrogeology and hydrodynamics of coral reef pore waters

Description: A wide variety of forces can produce head gradients that drive the flow and advective mixing of internal coral reef pore waters. Oscillatory gradients that produce mixing result from wave and tide action. Sustained gradients result from wave and tide-induced setup and ponding, from currents impinging on the reef structure, from groundwater heads, and from density differenced (temperature or salinity gradients). These gradients and the permeabilities and porosities of reef sediments are such tha… more
Date: June 29, 1988
Creator: Buddemeier, R.W. & Oberdorfer, J.A.
Partner: UNT Libraries Government Documents Department
open access

Prospects for cellular mutational assays in human populations

Description: Practical, sensitive, and effective human cellular assays for detecting somatic and germinal mutations would have great value in environmental mutagenesis and carcinogenesis studies. Such assays would fill the void between human mutagenicity and the data that exist from short-term tests and from mutagenicity in other species. This paper discusses the following possible human cellular assays: (1) HPRT (hypoxanthine phosphoribosyltransferase) somatic cell mutation based on 6-thioguanine resistanc… more
Date: June 29, 1984
Creator: Mendelsohn, M.L.
Partner: UNT Libraries Government Documents Department
open access

Particle distributions in collisionless magnetic reconnection: An implicit Particle-In-Cell (PIC) description

Description: Evidence from magnetospheric and solar flare research supports the belief that collisionless magnetic reconnection can proceed on the Alfven-wave crossing timescale. Reconnection behavior that occurs this rapidly in collisionless plasmas is not well understood because underlying mechanisms depend on the details of the ion and electron distributions in the vicinity of the emerging X-points. We use the direct implicit Particle-In-Cell (PIC) code AVANTI to study the details of these distributions … more
Date: June 29, 1990
Creator: Hewett, D. W.; Francis, G. E. & Max, C. E.
Partner: UNT Libraries Government Documents Department
open access

Semiquantum Chaos and the Large N Expansion

Description: When a classical oscillator is interacting with a purely quantum mechanical oscillator, described by the Lagrangian L = 1/2 x{sup 2} + 1/2A{sup 2} - 1/2 (m{sup 2} + e{sup 2} A{sup 2})x{sup 2}, where A is a classical variable and x is a quantum operator the relevant degrees of freedom for the quantum oscillator when {l_angle}x(t)x(t){r_angle} = G(t). The classical Hamiltonian dynamics governing the variables A(t). {Pi}{sub A}(t). G(t) and {Pi}{sub G}(t) is chaotic so that the results of making m… more
Date: June 29, 1994
Creator: Cooper, F.; Habib, S.; Kluger, Y.; Dawson, J.; Meredith, D. & Shepard, H.
Partner: UNT Libraries Government Documents Department
open access

Atmospheric transport analysis used in hazard screening methodology

Description: Simple, but conservative, atmospheric transport models are used in the initial stages of a hazard screening methodology to determine a preliminary hazard rank. The hazard rank is one indicator of the additional effort, if any, that must be applied to determine if a system is safe. Simple methods avoid prolonged calculations at this early stage when details of potential accidents may be poorly defined. The models are used to simulate the consequences resulting from accidental releases of toxic s… more
Date: June 29, 1992
Creator: Bloom, S. G.
Partner: UNT Libraries Government Documents Department
open access

Laser Driven High Pressure, High Strain-Rate Materials Experiments

Description: Laser-based experiments are being developed to study the response of solids under high pressure loading. Diagnostic techniques that have been applied include dynamic x-ray diffraction, VISAR wave profile measurements, and post-shock recovery and analysis. These techniques are presented with some results from shocked Si, Al, and Cu experiments.
Date: June 29, 2001
Creator: Kalantar, D. H.; Allen, A. M.; Gregori, F.; Kad, B.; Kumar, M.; Lorenz, K. T. et al.
Partner: UNT Libraries Government Documents Department
open access

In situ spectroscopic detection of SMSI effect in a Ni/CeO2 system: hydrogen-induced burial and dig out of metallic nickel

Description: In situ APPES technique demonstrates that the strong metal support interaction effect (SMSI) in the Ni-ceria system is associated with the decoration and burial of metallic particles by the partially reduced support, a phenomenon reversible by evacuation at high temperature of the previously absorbed hydrogen.
Date: June 29, 2010
Creator: Caballero, Alfonso; Holgado, Juan P.; Gonzalez-delaCruz, Victor M.; Habas, Susan e.; Herranz, Tirma & Salmeron, Miquel
Partner: UNT Libraries Government Documents Department
open access

Ultrafast Mid-Infrared Intra-Excitonic Response of Individualized Single-Walled Carbon Nanotubes

Description: The quasi-1D confinement and reduced screening of photoexcited charges in single-walled carbon nanotubes (SWNTs) entails strongly-enhanced Coulomb interactions and exciton binding energies. Such amplified electron-hole (e-h) correlations have important implications for both fundamental physics and optoelectronic applications of nanotubes. The availability of"individualized" SWNT ensembles with bright and structured luminescence has rendered specific tube chiralities experimentally acc… more
Date: June 29, 2009
Creator: Wang, Jigang; Graham, Matt W.; Ma, Yingzhong; Fleming, Graham R. & Kaindl, Robert A.
Partner: UNT Libraries Government Documents Department
open access

Scenarios for the ATF2 Ultra-Low Betas Proposal

Description: The current ATF2 Ultra-Low beta proposal was designed to achieve 20nm vertical IP beam size without considering the multipolar components of the FD magnets. In this paper we describe different scenarios that avoid the detrimental effect of these multipolar errors to the beam size at the interaction point (IP). The simplest approach consists in modifying the optics, but other solutions are studied as the introduction of super-conducting wigglers to reduce the emittance or the replacement of the … more
Date: June 29, 2012
Creator: Marin, Eduardo; Tomas, Rogelio; Bambade, Philip; Kuroda, Shigeru; Okugi, Toshiyuki; Tauchi, Toshiaki et al.
Partner: UNT Libraries Government Documents Department
open access

Sloan Digital Sky Survey Photometric Calibration Revisited

Description: The Sloan Digital Sky Survey calibration is revisited to obtain the most accurate photometric calibration. A small but significant error is found in the flat-fielding of the Photometric telescope used for calibration. Two SDSS star catalogs are compared and the average difference in magnitude as a function of right ascension and declination exhibits small systematic errors in relative calibration. The photometric transformation from the SDSS Photometric Telescope to the 2.5 m telescope is recom… more
Date: June 29, 2012
Creator: Marriner, John
Partner: UNT Libraries Government Documents Department
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