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Membrane Dehumidifier
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Building Energy Efficiency Through Innovative Thermodevices (BEETIT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses air conditioning with more energy efficient dehumidifying as part of the "High-Efficiency, On-Line Membrane Air Dehumidifier Enabling Sensible Cooling for Warm and Humid Climates" project.
Date:
February 15, 2012
Creator:
ADMA Products
Object Type:
Text
System:
The UNT Digital Library
Fermi-LAT Search for Pulsar Wind Nebulae Around Gamma-Ray Pulsars
None
Date:
June 15, 2012
Creator:
Ackermann, M.; Ajello, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Optimization of the Transport Shield for Neutrinoless Double Beta-decay Enriched Germanium
This document presents results of an investigation of the material and geometry choice for the transport shield of germanium, the active detector material used in 76Ge neutrinoless double beta decay searches. The objective of this work is to select the optimal material and geometry to minimize cosmogenic production of radioactive isotopes in the germanium material. The design of such a shield is based on the calculation of the cosmogenic production rate of isotopes that are known to cause interfering backgrounds in 76Ge neutrinoless double beta decay searches.
Date:
April 15, 2012
Creator:
Aguayo Navarrete, Estanislao; Kouzes, Richard T.; Orrell, John L.; Reid, Douglas J. & Fast, James E.
Object Type:
Report
System:
The UNT Digital Library
Distributed H{sub 2} Supply for Fuel Cell Utility Vehicles Year 6 - Activity 3.5 - Development fo a National Center for Hydrogen Technology
The Energy & Environmental Research Center (EERC) has developed a high-pressure hydrogen production system that reforms a liquid organic feedstock and water at operating pressures up to 800 bar (~12,000 psig). The advantages of this system include the elimination of energy-intensive hydrogen compression, a smaller process footprint, and the elimination of gaseous or liquid hydrogen transport. This system could also potentially enable distributed hydrogen production from centralized coal. Processes have been investigated to gasify coal and then convert the syngas into alcohol or alkanes. These alcohols and alkanes could then be easily transported in bulk to distributed high-pressure water-reforming (HPWR)-based systems to deliver hydrogen economically. The intent of this activity was to utilize the EERC’s existing HPWR hydrogen production process, previously designed and constructed in a prior project phase, as a basis to improve operational and production performance of an existing demonstration unit. Parameters to be pursued included higher hydrogen delivery pressure, higher hydrogen production rates, and the ability to refill within a 5-minute time frame.
Date:
April 15, 2012
Creator:
Almlie, Jay
Object Type:
Report
System:
The UNT Digital Library
Dynamic Behavior of Sand: Annual Report FY 11
Currently, design of earth-penetrating munitions relies heavily on empirical relationships to estimate behavior, making it difficult to design novel munitions or address novel target situations without expensive and time-consuming full-scale testing with relevant system and target characteristics. Enhancing design through numerical studies and modeling could help reduce the extent and duration of full-scale testing if the models have enough fidelity to capture all of the relevant parameters. This can be separated into three distinct problems: that of the penetrator structural and component response, that of the target response, and that of the coupling between the two. This project focuses on enhancing understanding of the target response, specifically granular geomaterials, where the temporal and spatial multi-scale nature of the material controls its response. As part of the overarching goal of developing computational capabilities to predict the performance of conventional earth-penetrating weapons, this project focuses specifically on developing new models and numerical capabilities for modeling sand response in ALE3D. There is general recognition that granular materials behave in a manner that defies conventional continuum approaches which rely on response locality and which degrade in the presence of strong response nonlinearities, localization, and phase gradients. There are many numerical tools available to address …
Date:
March 15, 2012
Creator:
Antoun, Tarabay; Herbold, Eric & Johnson, Scott
Object Type:
Report
System:
The UNT Digital Library
Energy Saving Melting and Revert Reduction Technology: Innovative Semi-Solid Metal (SSM) Processing
Semi-solid metal (SSM) processing has emerged as an attractive method for near-net-shape manufacturing due to the distinct advantages it holds over conventional near-net-shape forming technologies. These advantages include lower cycle time, increased die life, reduced porosity, reduced solidification shrinkage, improved mechanical properties, etc. SSM processing techniques can not only produce the complex dimensional details (e.g. thin-walled sections) associated with conventional high-pressure die castings, but also can produce high integrity castings currently attainable only with squeeze and low-pressure permanent mold casting processes. There are two primary semi-solid processing routes, (a) thixocasting and (b) rheocasting. In the thixocasting route, one starts from a non-dendritic solid precursor material that is specially prepared by a primary aluminum manufacturer, using continuous casting methods. Upon reheating this material into the mushy (a.k.a. "two-phase") zone, a thixotropic slurry is formed, which becomes the feed for the casting operation. In the rheocasting route (a.k.a. "slurry-on-demand" or "SoD"), one starts from the liquid state, and the thixotropic slurry is formed directly from the melt via careful thermal management of the system; the slurry is subsequently fed into the die cavity. Of these two routes, rheocasting is favored in that there is no premium added to the billet cost, and …
Date:
August 15, 2012
Creator:
Apelian, Diran
Object Type:
Report
System:
The UNT Digital Library
Energy Efficient Building Ventilation Systems
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Building Energy Efficiency Through Innovative Thermodevices (BEETIT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses air conditioning that uses moisture and heat exchange technology as part of the "Innovative Building-Integrated Enthalpy Recovery" project.
Date:
February 15, 2012
Creator:
Architectural Application
Object Type:
Text
System:
The UNT Digital Library
Air Conditioning with Magnetic Refrigeration
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Building Energy Efficiency Through Innovative Thermodevices (BEETIT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses air conditioning with magnetic refrigeration as part of "An Efficient, Green Compact Cooling System Using Magnetic Refrigeration" project.
Date:
February 15, 2012
Creator:
Astronautics Corporation of America
Object Type:
Text
System:
The UNT Digital Library
Energy Renovations: Volume 17: Insulation - A Guide for Contractors to Share with Homeowners
This report was prepared by PNNL for DOE's Building America program and is intended as a guide that energy performance contractors can share with homeowners to describe various insulation options for improving the energy performance and comfort of existing homes. The report provides descriptions of many common insulation types, including their advantages and disadvantages, R-values, characteristics, and typical uses. The report also describes potentially hazardous products such as asbestos and formaldehyde and safety issues when conducting energy-efficient upgrades including radon. The guide is available for download at the DOE Building America website, www.buildingamerica.gov.
Date:
May 15, 2012
Creator:
Baechler, Michael C.; Adams, Karen; Hefty, Marye G.; Gilbride, Theresa L. & Love, Pat M.
Object Type:
Report
System:
The UNT Digital Library
Antebellum Jefferson, Texas: Everyday Life in an East Texas Town
Access:
Use of this item is restricted to the UNT Community
Founded in 1845 as a steamboat port at the entryway to western markets from the Red River, Jefferson was a thriving center of trade until the steamboat traffic dried up in the 1870s. During its heyday, the town monopolized the shipping of cotton from all points west for 150 miles. Jefferson was the unofficial capital of East Texas, but it was also typical of boom towns in general. For this topical examination of a frontier town, Bagur draws from many government documents, but also from newspaper ads and plats. These sources provide intimate details of the lives of the early citizens of Jefferson, Texas. Their story is of interest to both local and state historians as well as to the many readers interested in capturing the flavor of life in old-time East Texas. “Astoundingly complete and a model for local history research, with appeal far beyond readers who have specific interests in Jefferson.”—Fred Tarpley, author of Jefferson: Riverport to the Southwest
Date:
March 15, 2012
Creator:
Bagur, Jacques D.
Object Type:
Book
System:
The UNT Digital Library
TANK 40 FINAL SB7B CHEMICAL CHARACTERIZATION RESULTS
A sample of Sludge Batch 7b (SB7b) was taken from Tank 40 in order to obtain radionuclide inventory analyses necessary for compliance with the Waste Acceptance Product Specifications (WAPS). The SB7b WAPS sample was also analyzed for chemical composition including noble metals and fissile constituents, and these results are reported here. These analyses along with the WAPS radionuclide analyses will help define the composition of the sludge in Tank 40 that is currently being fed to the Defense Waste Processing Facility (DWPF) as SB7b. At the Savannah River National Laboratory (SRNL) the 3-L Tank 40 SB7b sample was transferred from the shipping container into a 4-L high density polyethylene bottle and solids were allowed to settle over the weekend. Supernate was then siphoned off and circulated through the shipping container to complete the transfer of the sample. Following thorough mixing of the 3-L sample, a 558 g sub-sample was removed. This sub-sample was then utilized for all subsequent analytical samples. Eight separate aliquots of the slurry were digested, four with HNO{sub 3}/HCl (aqua regia) in sealed Teflon{reg_sign} vessels and four with NaOH/Na{sub 2}O{sub 2} (alkali or peroxide fusion) using Zr crucibles. Two Analytical Reference Glass - 1 (ARG-1) standards were …
Date:
March 15, 2012
Creator:
Bannochie, C.
Object Type:
Report
System:
The UNT Digital Library
Southeast Regional CO2 Sequestration Technology Training Program (SECARB-Ed)
None
Date:
November 15, 2012
Creator:
Baskin, Kathryn; Hill, Gerald; Berry, Patricia; Ripepi, Nino; Karmis, Michael; Young, Michael et al.
Object Type:
Report
System:
The UNT Digital Library
Limit of detection of Bacillus anthracis in complex soil and air samples using next-generation sequencing
None
Date:
March 15, 2012
Creator:
Be, Nicholas A.; Thissen, James B.; Gardner, Shea; McLoughlin, Kevin; Fofanov, Viacheslav; Koshinsky, Heather et al.
Object Type:
Article
System:
The UNT Digital Library
Using SciDB to Support Photon Science Data Analysis
Array data analytic systems like SciDB hold great potential to accelerate processing data from SLAC's Linac Coherent Light Source and other experiments. SciDB is unique in its ability to integrate storage and processing of array data efficiently, providing both space-efficient storage and out-of-memory efficient parallel array processing. We describe a recent effort to leverage SciDB to store and process LCLS data. The work includes development of software to import data into SciDB, subsequent benchmarks, and interactive manipulation of data in SciDB.
Date:
February 15, 2012
Creator:
Becla, Jack; Wang, Daniel & lim, Kian-Tat
Object Type:
Report
System:
The UNT Digital Library
Holocaust-Era Insurance Claims: Background and Proposed Legislation
This report aims to inform consideration of H.R. 890 and S. 466 and possible alternatives by providing; background on Holocaust-era compensation and restitution issues; an overview of ICHEIC, including criticism and support of its claims process and Administration policy on ICHEIC; and an overview of litigation on Holocaust-era insurance claims and the proposed legislation.
Date:
June 15, 2012
Creator:
Belkin, Paul; Ruane, Kathleen Ann & Webel, Baird
Object Type:
Report
System:
The UNT Digital Library
Navajo-Hopi Land Commission Renewable Energy Development Project (NREP)
The Navajo Hopi Land Commission Office (NHLCO), a Navajo Nation executive branch agency has conducted activities to determine capacity-building, institution-building, outreach and management activities to initiate the development of large-scale renewable energy - 100 megawatt (MW) or larger - generating projects on land in Northwestern New Mexico in the first year of a multi-year program. The Navajo Hopi Land Commission Renewable Energy Development Project (NREP) is a one year program that will develop and market a strategic business plan; form multi-agency and public-private project partnerships; compile site-specific solar, wind and infrastructure data; and develop and use project communication and marketing tools to support outreach efforts targeting the public, vendors, investors and government audiences.
Date:
May 15, 2012
Creator:
Benally, Thomas
Object Type:
Report
System:
The UNT Digital Library
Measurement of the D_s Decay Constant f_Ds and Observation of New Charm Resonances Decaying to D^(*)\pi
The absolute branching fractions for the decays D{sub s}{sup -} {yields} {ell}{sup -}{bar {nu}}{sub {ell}} ({ell} = e, {mu}, or {tau}) are measured using a data sample corresponding to an integrated luminosity of 521 fb{sup -1} collected at center of mass energies near 10.58 GeV with the BABAR detector at the PEPII e{sup +}e{sup -} collider at SLAC. The number of D{sub s}{sup -} mesons is determined by reconstructing the recoiling system DKX{gamma} in events of the type e{sup +}e{sup -} {yields} DKXD*{sub s}{sup -}, where D*{sub s}{sup -} {yields} D{sub s}{sup -} {gamma} and X represents additional pions from fragmentation. The D{sub s}{sup -} {yields} {ell}{sup -}{nu}{sub {ell}} events are detected by full or partial reconstruction of the recoiling system DKX{gamma}{ell}. The following results are obtained: {Beta}(D{sub s}{sup -} {yields} {mu}{sup -}{nu}) = (6.02 {+-} 0.38 {+-} 0.34) x 10{sup -3}, {Beta}(D{sub s}{sup -} {yields} {tau}{sup -}{nu}) = (5.00 {+-} 0.35 {+-} 0.49) x 10{sup -2}, and B(D{sub s}{sup -} {yields} e{sup -}{nu}) < 2.8 x 10{sup -4} at 90% C.L., where the first uncertainty is statistical and the second is systematic. The branching fraction measurements are combined to determine the D{sub s}{sup -} decay constant f{sub D{sub s}} …
Date:
March 15, 2012
Creator:
Benitez, Jose
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Simplifying Multi-loop Integrands of Gauge Theory and Gravity Amplitudes
We use the duality between color and kinematics to simplify the construction of the complete four-loop four-point amplitude of N = 4 super-Yang-Mills theory, including the nonplanar contributions. The duality completely determines the amplitude's integrand in terms of just two planar graphs. The existence of a manifestly dual gauge-theory amplitude trivializes the construction of the corresponding N = 8 supergravity integrand, whose graph numerators are double copies (squares) of the N = 4 super-Yang-Mills numerators. The success of this procedure provides further nontrivial evidence that the duality and double-copy properties hold at loop level. The new form of the four-loop four-point supergravity amplitude makes manifest the same ultraviolet power counting as the corresponding N = 4 super-Yang-Mills amplitude. We determine the amplitude's ultraviolet pole in the critical dimension of D = 11/2, the same dimension as for N = 4 super-Yang-Mills theory. Strikingly, exactly the same combination of vacuum integrals (after simplification) describes the ultraviolet divergence of N = 8 supergravity as the subleading-in-1/N{sub c}{sup 2} single-trace divergence in N = 4 super-Yang-Mills theory.
Date:
February 15, 2012
Creator:
Bern, Z.; Carrasco, J.J.M.; Dixon, L.J.; Johansson, H. & Roiban, R.
Object Type:
Article
System:
The UNT Digital Library
NLO Vector Boson Production With Light Jets
In this contribution we present recent progress in the computation of next-to-leading order (NLO) QCD corrections for the production of an electroweak vector boson in association with jets at hadron colliders. We focus on results obtained using the virtual matrix element library BlackHat in conjunction with SHERPA, focusing on results relevant to understanding the background to top production. The production of a vector boson in association with several jets at the Large Hadron Collider (LHC) is an important background for other Standard Model processes as well as new physics signals. In particular, the production of a W boson in association with many jets is an important background for processes involving one or more top quarks. Precise predictions for the backgrounds are crucial to measurement of top-quark processes. Vector boson production in association with multiple jets is also a very important background for many SUSY searches, as it mimics the signatures of many typical decay chains. Here we will discuss how polarization information can be used as an additional handle to differentiate top pair production from 'prompt' W-boson production. More generally, ratios of observables, for example for events containing a W boson versus those containing a Z boson, are expected to …
Date:
February 15, 2012
Creator:
Bern, Z.; Diana, G.; Dixon, L.J.; Febres Cordero, F.; Forde, D.; Gleisberg, T. et al.
Object Type:
Article
System:
The UNT Digital Library
Bounds and self-consistent estimates for elastic constants of polycrystals of hcp solid He{sup 4}
Recent advances in methods for computing both Hashin-Shtrikman bounds and related selfconsistent (or CPA) estimates of elastic constants for polycrystals composed of randomly oriented crystals can be applied successfully to hexagonal close packed solid He{sup 4}. In particular, since the shear modulus C{sub 44} of hexagonal close-packed solid He is known to undergo large temperature variations when 20 mK {<=}#20; T {<=}#20; 200 mK, bounds and estimates computed with this class of effective medium methods, while using C{sub 44} {r_arrow} 0 as a proxy for melting, are found to be both qualitatively and quantitatively very similar to prior results obtained using Monte Carlo methods. Hashin- Shtrikman bounds provide significantly tighter constraints on the polycrystal behavior than do the traditional Voigt and Reuss bounds.
Date:
February 15, 2012
Creator:
Berryman, J. G.
Object Type:
Article
System:
The UNT Digital Library
Fast Beam-Based BPM Calibration
The Alignment Diagnostic System (ADS) of the LCLS undulator system indicates that the 33 undulator quadrupoles have extremely high position stability over many weeks. However, beam trajectory straightness and lasing efficiency degrade more quickly than this. A lengthy Beam Based Alignment (BBA) procedure must be executed every two to four weeks to re-optimize the X-ray beam parameters. The undulator system includes RF cavity Beam Position Monitors (RFBPMs), several of which are utilized by an automatic feedback system to align the incoming electron-beam trajectory to the undulator axis. The beam trajectory straightness degradation has been traced to electronic drifts of the gain and offset of the BPMs used in the beam feedback system. To quickly recover the trajectory straightness, we have developed a fast beam-based procedure to recalibrate the BPMs. This procedure takes advantage of the high-precision monitoring capability of the ADS, which allows highly repeatable positioning of undulator quadrupoles. This report describes the ADS, the position stability of the LCLS undulator quadrupoles, and some results of the new recovery procedure.
Date:
October 15, 2012
Creator:
Bertsche, K.; Loos, H.; Nuhn, H. D. & Peters, F.
Object Type:
Article
System:
The UNT Digital Library
Doctoral Recital: 2012-09-15 - Christian Bester, baritone
Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
September 15, 2012
Creator:
Bester, Christian
Object Type:
Sound
System:
The UNT Digital Library
Employee Stock Options: Tax Treatment and Tax Issues
None
Date:
June 15, 2012
Creator:
Bickley, James M.
Object Type:
Report
System:
The UNT Digital Library
The Domestic Terrorist Threat: Background and Issues for Congress
In the last decade, domestic terrorists-people who commit crimes within the homeland and draw inspiration from U.S.-based extremist ideologies and movements-have killed American citizens and damaged property across the country. Not all of these criminals have been prosecuted under terrorism statutes. This report discusses domestic terrorism's significance to policymakers per five topics: level of activity, use of nontraditional tactics, exploitation of the internet, decentralized nature of the threat, and prison radicalization. The report also discusses three areas that Congress may consider the federal role of combating such activities: the issue of definitions, adequacy of domestic terrorism intelligence collection efforts, and the value of community outreach driven efforts to quell terrorism related radicalization in the United States.
Date:
May 15, 2012
Creator:
Bjelopera, Jerome P.
Object Type:
Report
System:
The UNT Digital Library