European Security, Islamist Terrorism, and Returning Fighters (open access)

European Security, Islamist Terrorism, and Returning Fighters

This report discusses European concerns about Islamist terrorism, which have been heightened considerably by several attacks over the last year and the growing number of European citizens training and fighting with extremist groups in foreign conflicts (especially in Syria and Iraq).
Date: September 15, 2015
Creator: Archick, Kristin & Belkin, Paul
Object Type: Report
System: The UNT Digital Library
Energy Efficient Building Ventilation Systems (open access)

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
Western Sahara (open access)

Western Sahara

This report discusses how Morocco and the independence-seeking Popular Front for the Liberation of Saqiat al Hamra and Rio de Oro (Polisario) have been vying for control of the Western Sahara, a former Spanish territory, since the 1970s. The report discusses recent settlement attempts, as well as how the Western Sahara issue has affected Algerian-Moroccan bilaterial relations, Moroccan relations with the African Union, and regional cooperation on economic and security issues. The report also discusses the United States' involvement in and stance on the issue.
Date: February 15, 2011
Creator: Arieff, Alexis
Object Type: Report
System: The UNT Digital Library
Droplet Evolution in Warm Dense Matter Expanding Flow (open access)

Droplet Evolution in Warm Dense Matter Expanding Flow

None
Date: September 15, 2010
Creator: Armijo, J & Barnard, J J
Object Type: Article
System: The UNT Digital Library
Evaluating greenhouse gas emissions from hydropower complexes on large rivers in Eastern Washington (open access)

Evaluating greenhouse gas emissions from hydropower complexes on large rivers in Eastern Washington

Water bodies, such as freshwater lakes, are known to be net emitters of carbon dioxide (CO2), and methane (CH4). In recent years, significant greenhouse gas (GHG) emissions from tropical, boreal, and mid-latitude reservoirs have been reported. At a time when hydropower is increasing worldwide, better understanding of seasonal and regional variation in GHG emissions is needed in order to develop a predictive understanding of such fluxes within man-made impoundments. We examined power-producing dam complexes within xeric temperate locations in the northwestern United States. Sampling environments on the Snake (Lower Monumental Dam Complex) and Columbia Rivers (Priest Rapids Dam Complex) included tributary, mainstem, embayment, forebay, and tailrace areas during winter and summer 2012. At each sampling location, GHG measurement pathways included surface gas flux, degassing as water passed through dams during power generation, ebullition within littoral embayments, and direct sampling of hyporheic pore-water. Measurements were also carried out in a free-flowing reach of the Columbia River to estimate unaltered conditions. Surface flux resulted in very low emissions, with reservoirs acting as a sink for CO2 (up to –262 mg m-2 d-1, which is within the range previously reported for similarly located reservoirs). Surface flux of methane remained below 1 mg CH4 …
Date: March 15, 2013
Creator: Arntzen, Evan V.; Miller, Benjamin L.; O'Toole, Amanda C.; Niehus, Sara E. & Richmond, Marshall C.
Object Type: Report
System: The UNT Digital Library
U.S. Department of Energy Clean Cities Five-Year Strategic Plan (open access)

U.S. Department of Energy Clean Cities Five-Year Strategic Plan

Clean Cities is a government-industry partnership sponsored by the U.S. Department of Energy's (DOE) Vehicle Technologies Program, which is part of the Office of Energy Efficiency and Renewable Energy. Working with its network of about 100 local coalitions and more than 6,500 stakeholders across the country, Clean Cities delivers on its mission to reduce petroleum consumption in on-road transportation. In its work to reduce petroleum use, Clean Cities focuses on a portfolio of technologies that includes electric drive, propane, natural gas, renewable natural gas/biomethane, ethanol/E85, biodiesel/B20 and higher-level blends, fuel economy, and idle reduction. Over the past 17 years, Clean Cities coalitions have displaced more than 2.4 billion gallons of petroleum; they are on track to displace 2.5 billion gallons of gasoline per year by 2020. This Clean Cities Strategic Plan lays out an aggressive five-year agenda to help DOE Clean Cities and its network of coalitions and stakeholders accelerate the deployment of alternative fuel and advanced technology vehicles, while also expanding the supporting infrastructure to reduce petroleum use. Today, Clean Cities has a far larger opportunity to make an impact than at any time in its history because of its unprecedented $300 million allocation for community-based deployment projects from …
Date: February 15, 2011
Creator: Associates, Cambridge Concord
Object Type: Report
System: The UNT Digital Library
Analysis of Flow Cytometry DNA Damage Response Protein Activation Kinetics Following X-rays and High Energy Iron Nuclei Exposure (open access)

Analysis of Flow Cytometry DNA Damage Response Protein Activation Kinetics Following X-rays and High Energy Iron Nuclei Exposure

We developed a mathematical method to analyze flow cytometry data to describe the kinetics of {gamma}H2AX and pATF2 phosphorylations ensuing various qualities of low dose radiation in normal human fibroblast cells. Previously reported flow cytometry kinetic results for these DSB repair phospho-proteins revealed that distributions of intensity were highly skewed, severely limiting the detection of differences in the very low dose range. Distributional analysis reveals significant differences between control and low dose samples when distributions are compared using the Kolmogorov-Smirnov test. Radiation quality differences are found in the distribution shapes and when a nonlinear model is used to relate dose and time to the decay of the mean ratio of phosphoprotein intensities of irradiated samples to controls. We analyzed cell cycle phase and radiation quality dependent characteristic repair times and residual phospho-protein levels with these methods. Characteristic repair times for {gamma}H2AX were higher following Fe nuclei as compared to X-rays in G1 cells (4.5 {+-} 0.46 h vs 3.26 {+-} 0.76 h, respectively), and in S/G2 cells (5.51 {+-} 2.94 h vs 2.87 {+-} 0.45 h, respectively). The RBE in G1 cells for Fe nuclei relative to X-rays for {gamma}H2AX was 2.05 {+-} 0.61 and 5.02 {+-} 3.47, at 2 …
Date: December 15, 2010
Creator: Association, Universities Space Research; Chappell, Lori J.; Whalen, Mary K.; Gurai, Sheena; Ponomarev, Artem; Cucinotta, Francis A. et al.
Object Type: Article
System: The UNT Digital Library
Air Conditioning with Magnetic Refrigeration (open access)

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
Ultra-High Efficiency and Low-Emissions Combustion Technology for Manufacturing Industries (open access)

Ultra-High Efficiency and Low-Emissions Combustion Technology for Manufacturing Industries

The purpose of this research was to develop and test a transformational combustion technology for high temperature furnaces to reduce the energy intensity and carbon footprint of U.S. manufacturing industries such as steel, aluminum, glass, metal casting, and petroleum refining. A new technology based on internal and/or external Flue Gas Recirculation (FGR) along with significant enhancement in flame radiation was developed. It produces "Radiative Flameless Combustion (RFC)" and offers tremendous energy efficiency and pollutant reduction benefits over and above the now popular "flameless combustion." It will reduce the energy intensity (or fuel consumption per unit system output) by more than 50% and double the furnace productivity while significantly reducing pollutants and greenhouse gas emissions (10^3 times reduction in NOx and 10 times reduction in CO & hydrocarbons and 3 times reduction in CO2). Product quality improvements are also expected due to uniform radiation, as well as, reduction in scale/dross formation is expected because of non-oxidative atmosphere. RFC is inexpensive, easy to implement, and it was successfully tested in a laboratory-scale furnace at the University of Michigan during the course of this work. A first-ever theory with gas and particulate radiation was also developed. Numerical programs were also written to design …
Date: April 15, 2013
Creator: Atreya, Arvind
Object Type: Report
System: The UNT Digital Library
Mandatory Spending Since 1962 (open access)

Mandatory Spending Since 1962

Mandatory spending includes federal government spending on entitlement programs as well as other budget outlays controlled by laws other than appropriation acts. Entitlement programs such as Social Security and Medicare make up the bulk of mandatory spending. This report looks at mandatory spending and how it has grown over time relative to total federal spending and the size of the U.S. economy. It also analyzes future mandatory spending levels and how they are projected to impact the federal budget.
Date: September 15, 2010
Creator: Austin, D. A. & Levit, Mindy R.
Object Type: Report
System: The UNT Digital Library
Trends in Discretionary Spending (open access)

Trends in Discretionary Spending

This report discusses recent trends in discretionary spending. Topics examined include fiscal policy in the wake of the recession, discretionary spending limits reimposed in 2011, the FY2013 sequestration, long term trends, and security spending.
Date: April 15, 2013
Creator: Austin, D. Andrew
Object Type: Report
System: The UNT Digital Library
The Debt Limit: History and Recent Increases (open access)

The Debt Limit: History and Recent Increases

This report discusses how the total debt of the federal government can increase, an historical overview of debt limits, and how the current economic slowdown has led to higher deficits and thereby a series of debt limit increases, as well as legislation related to these increases.
Date: October 15, 2013
Creator: Austin, D. Andrew & Levit, Mindy R.
Object Type: Report
System: The UNT Digital Library
Exascale for Energy: The Role of Exascale Computing in Energy Security (open access)

Exascale for Energy: The Role of Exascale Computing in Energy Security

How will the United States satisfy energy demand in a tightening global energy marketplace while, at the same time, reducing greenhouse gas emissions? Exascale computing -- expected to be available within the next eight to ten years ? may play a crucial role in answering that question by enabling a paradigm shift from test-based to science-based design and engineering. Computational modeling of complete power generation systems and engines, based on scientific first principles, will accelerate the improvement of existing energy technologies and the development of new transformational technologies by pre-selecting the designs most likely to be successful for experimental validation, rather than relying on trial and error. The predictive understanding of complex engineered systems made possible by computational modeling will also reduce the construction and operations costs, optimize performance, and improve safety. Exascale computing will make possible fundamentally new approaches to quantifying the uncertainty of safety and performance engineering. This report discusses potential contributions of exa-scale modeling in four areas of energy production and distribution: nuclear power, combustion, the electrical grid, and renewable sources of energy, which include hydrogen fuel, bioenergy conversion, photovoltaic solar energy, and wind turbines. Examples of current research are taken from projects funded by the U.S. …
Date: July 15, 2010
Creator: Authors, Various
Object Type: Report
System: The UNT Digital Library
Final Report: Photo-Directed Molecular Assembly of Multifunctional Inorganic Materials (open access)

Final Report: Photo-Directed Molecular Assembly of Multifunctional Inorganic Materials

This final report details results, conclusions, and opportunities for future effort derived from the study. The work involved combining the molecular engineering of photoactive Ti-alkoxide systems and the optical excitation of hydrolysis and condensation reactions to influence the development of the metal-oxygen-metal network at the onset of material formation. Selective excitation of the heteroleptic alkoxides, coupled with control of alkoxide local chemical environment, enabled network connectivity to be influenced and formed the basis for direct deposition and patterning of Ti-oxide-based materials. The research provided new insights into the intrinsic photoresponse and assembly of these complex, alkoxide molecules. Using a suite of electronic, vibrational, and nuclear spectroscopic probes, coupled with quantum chemical computation, the excitation wavelength and fluence dependence of molecular photoresponse and the nature of subsequent hydrolysis and condensation processes were probed in pyridine-carbinol-based Ti-alkoxides with varied counter ligand groups. Several methods for the patterning of oxide material formation were demonstrated, including the integration of this photoprocessing approach with conventional, dip-coating methodologies.
Date: October 15, 2010
Creator: B.G. Potter, Jr.
Object Type: Report
System: The UNT Digital Library
Energy Renovations: Volume 17: Insulation - A Guide for Contractors to Share with Homeowners (open access)

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
Improving the Top Quark Forward-Backward Asymmetry Measurement at the LHC (open access)

Improving the Top Quark Forward-Backward Asymmetry Measurement at the LHC

At the LHC, top quark pairs are dominantly produced from gluons, making it difficult to measure the top quark forward-backward asymmetry. To improve the asymmetry measurement, we study variables that can distinguish between top quarks produced from quarks and those from gluons: the invariant mass of the top pair, the rapidity of the top-antitop system in the lab frame, the rapidity of the top quark in the top-antitop rest frame, the top quark polarization and the top-antitop spin correlation. We combine all the variables in a likelihood discriminant method to separate quark-initiated events from gluon-initiated events. We apply our method on models including G-prime's and W-prime's motivated by the recent observation of a large top quark forward-backward asymmetry at the Tevatron. We have found that the significance of the asymmetry measurement can be improved by 10% to 30%. At the same time, the central values of the asymmetry increase by 40% to 100%. We have also analytically derived the best spin quantization axes for studying top quark polarization as well as spin-correlation for the new physics models.
Date: August 15, 2011
Creator: Bai, Yang & Han, Zhenyu
Object Type: Article
System: The UNT Digital Library
A Piecewise Linear Discontinuous Finite Element Spatial Discretization of the Sn Transport Equation for Polyhedral Grids in 3D Cartesian Geometry (open access)

A Piecewise Linear Discontinuous Finite Element Spatial Discretization of the Sn Transport Equation for Polyhedral Grids in 3D Cartesian Geometry

None
Date: August 15, 2011
Creator: Bailey, T S; Hawkins, W D & Adams, M L
Object Type: Article
System: The UNT Digital Library
Wakefield Calculations for Septum Magnet in LCLS-II (open access)

Wakefield Calculations for Septum Magnet in LCLS-II

None
Date: October 15, 2013
Creator: Bane, K. L. F. & Raubenheimer, T.
Object Type: Article
System: The UNT Digital Library
XML Network Description Language (XNDL) for ns-3 (open access)

XML Network Description Language (XNDL) for ns-3

None
Date: February 15, 2013
Creator: Banks, L. E.; Barnes, P. D.; Jefferson, D. R. & Nikolaev, S.
Object Type: Report
System: The UNT Digital Library
TANK 40 FINAL SB7B CHEMICAL CHARACTERIZATION RESULTS (open access)

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
Effect of SSPM Surface Coating on Light Collection Efficiency and Optical Crosstalk for Scintillation Detection (open access)

Effect of SSPM Surface Coating on Light Collection Efficiency and Optical Crosstalk for Scintillation Detection

None
Date: October 15, 2010
Creator: Barton, P.; Stapels, C.; Johnson, E.; Christian, J.; Moses, B.; Janecek, M. et al.
Object Type: Article
System: The UNT Digital Library
Southeast Regional CO2 Sequestration Technology Training Program (SECARB-Ed) (open access)

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 (open access)

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 (open access)

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