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1,632 Matching Results
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The Action of Action Research: An Analysis of Action Research Projects Completed in the UNT/Denton ISD PDS
This paper discusses an analysis of action research projects completed in the UNT/Denton Independent School District (ISD). Action research is the inquiry part of a Professional Development School (PDS) model that all UNT elementary education, pre-service teacher/student interns complete with mentor teachers during student teaching.
Date:
April 19, 2012
Creator:
Potter, Codi & Tunks, Jeanne L.
Object Type:
Paper
System:
The UNT Digital Library
The Action of Action Research: An Analysis of Action Research Projects Completed in the UNT/Denton ISD PDS [Presentation]
Presentation for the 2012 University Scholars Day at the University of North Texas discussing Action Research and the inquiry part of a Professional Development School (PDS) model that all UNT elementary education, pre-service teacher/student interns complete with mentor teachers during student teaching.
Date:
April 19, 2012
Creator:
Potter, Codi & Tunks, Jeanne L.
Object Type:
Presentation
System:
The UNT Digital Library
Actual and potential users of the BnF web archives: Experiences and expectations
Presentation for the 2012 International Internet Preservation Consortium General Assembly. Discusses the experiences of actual users of the Bibliothèque nationale de France web archives as well as the needs of potential users, and what BnF can do to improve access in the future.
Date:
April 30, 2012
Creator:
Oury, Clément & Stirling, Peter
Object Type:
Presentation
System:
The UNT Digital Library
Adaptive Algebraic Multigrid for Finite Element Elliptic Equations with Random Coefficients
This thesis presents a two-grid algorithm based on Smoothed Aggregation Spectral Element Agglomeration Algebraic Multigrid (SA-{rho}AMGe) combined with adaptation. The aim is to build an efficient solver for the linear systems arising from discretization of second-order elliptic partial differential equations (PDEs) with stochastic coefficients. Examples include PDEs that model subsurface flow with random permeability field. During a Markov Chain Monte Carlo (MCMC) simulation process, that draws PDE coefficient samples from a certain distribution, the PDE coefficients change, hence the resulting linear systems to be solved change. At every such step the system (discretized PDE) needs to be solved and the computed solution used to evaluate some functional(s) of interest that then determine if the coefficient sample is acceptable or not. The MCMC process is hence computationally intensive and requires the solvers used to be efficient and fast. This fact that at every step of MCMC the resulting linear system changes, makes an already existing solver built for the old problem perhaps not as efficient for the problem corresponding to the new sampled coefficient. This motivates the main goal of our study, namely, to adapt an already existing solver to handle the problem (with changed coefficient) with the objective to achieve …
Date:
April 2, 2012
Creator:
Kalchev, D
Object Type:
Report
System:
The UNT Digital Library
Advanced Energy Design Guides Slash Energy Use in Schools and Retail Buildings by 50% (Fact Sheet)
Owners, contractors, engineers, and architects can easily achieve significant energy savings by leveraging the complex analyses and expertise captured in these guides.
Date:
April 1, 2012
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced High-Temperature Reactor Dynamic System Model Development: April 2012 Status
The Advanced High-Temperature Reactor (AHTR) is a large-output fluoride-salt-cooled high-temperature reactor (FHR). An early-phase preconceptual design of a 1500 MW(e) power plant was developed in 2011 [Refs. 1 and 2]. An updated version of this plant is shown as Fig. 1. FHRs feature low-pressure liquid fluoride salt cooling, coated-particle fuel, a high-temperature power cycle, and fully passive decay heat rejection. The AHTR is designed to be a “walk away” reactor that requires no action to prevent large off-site releases following even severe reactor accidents. This report describes the development of dynamic system models used to further the AHTR design toward that goal. These models predict system response during warmup, startup, normal operation, and limited off-normal operating conditions. Severe accidents that include a loss-of-fluid inventory are not currently modeled. The scope of the models is limited to the plant power system, including the reactor, the primary and intermediate heat transport systems, the power conversion system, and safety-related or auxiliary heat removal systems. The primary coolant system, the intermediate heat transport system and the reactor building structure surrounding them are shown in Fig. 2. These systems are modeled in the most detail because the passive interaction of the primary system with the …
Date:
April 30, 2012
Creator:
Qualls, A.L.; Cetiner, M.S. & Wilson, T.L., Jr.
Object Type:
Report
System:
The UNT Digital Library
Advanced Nuclear Fuel Cycle Effects on the Treatment of Uncertainty in the Long-Term Assessment of Geologic Disposal Systems - Ebs Input
The Used Fuel Disposition (UFD) Campaign within the Department of Energy's Office of Nuclear Energy (DOE-NE) Fuel Cycle Technology (FCT) program has been tasked with investigating the disposal of the nation's spent nuclear fuel (SNF) and high-level nuclear waste (HLW) for a range of potential waste forms and geologic environments. The planning, construction, and operation of a nuclear disposal facility is a long-term process that involves engineered barriers that are tailored to both the geologic environment and the waste forms being emplaced. The UFD Campaign is considering a range of fuel cycles that in turn produce a range of waste forms. The UFD Campaign is also considering a range of geologic media. These ranges could be thought of as adding uncertainty to what the disposal facility design will ultimately be; however, it may be preferable to thinking about the ranges as adding flexibility to design of a disposal facility. For example, as the overall DOE-NE program and industrial actions result in the fuel cycles that will produce waste to be disposed, and the characteristics of those wastes become clear, the disposal program retains flexibility in both the choice of geologic environment and the specific repository design. Of course, other factors …
Date:
April 25, 2012
Creator:
Sutton, M.; Blink, J. A.; Greenberg, H. R. & Sharma, M.
Object Type:
Report
System:
The UNT Digital Library
Advanced Production Surface Preparation Technology Development for Ultra-High Pressure Diesel Injection
In 2007, An Ultra High Injection Pressure (UHIP) fueling method has been demonstrated by Caterpillar Fuel Systems - Product Development, demonstrating ability to deliver U.S. Environment Protection Agency (EPA) Tier 4 Final diesel engine emission performance with greatly reduced emissions handling components on the engine, such as without NOx reduction after-treatment and with only a through-flow 50% effective diesel particulate trap (DPT). They have shown this capability using multiple multi-cylinder engine tests of an Ultra High Pressure Common Rail (UHPCR) fuel system with higher than traditional levels of CEGR and an advanced injector nozzle design. The system delivered better atomization of the fuel, for more complete burn, to greatly reduce diesel particulates, while CEGR or high efficiency NOx reduction after-treatment handles the NOx. With the reduced back pressure of a traditional DPT, and with the more complete fuel burn, the system reduced levels of fuel consumption by 2.4% for similar delivery of torque and horsepower over the best Tier 4 Interim levels of fuel consumption in the diesel power industry. The challenge is to manufacture the components in high-volume production that can withstand the required higher pressure injection. Production processes must be developed to increase the toughness of the injector …
Date:
April 30, 2012
Creator:
Grant, Marion B.
Object Type:
Report
System:
The UNT Digital Library
An Advanced simulation Code for Modeling Inductive Output Tubes
During the Phase I program, CCR completed several major building blocks for a 3D large signal, inductive output tube (IOT) code using modern computer language and programming techniques. These included a 3D, Helmholtz, time-harmonic, field solver with a fully functional graphical user interface (GUI), automeshing and adaptivity. Other building blocks included the improved electrostatic Poisson solver with temporal boundary conditions to provide temporal fields for the time-stepping particle pusher as well as the self electric field caused by time-varying space charge. The magnetostatic field solver was also updated to solve for the self magnetic field caused by time changing current density in the output cavity gap. The goal function to optimize an IOT cavity was also formulated, and the optimization methodologies were investigated.
Date:
April 27, 2012
Creator:
Bui, Thuc & Ives, R. Lawrence
Object Type:
Report
System:
The UNT Digital Library
Advanced Vehicle Testing Activity Benchmark Testing of the Chevrolet Volt Onboard Charger
This is a report for public consumption, for the AVTA website, detailing the testing and analysis of the benchmark testing conducted on the Chevrolet Volt on-board charger.
Date:
April 1, 2012
Creator:
Carlson, Richard
Object Type:
Report
System:
The UNT Digital Library
Advertising by the Federal Government: An Overview
A look at government agencies spending on advertising.
Date:
April 6, 2012
Creator:
Kosar, Kevin R.
Object Type:
Report
System:
The UNT Digital Library
The Advocate, Volume 17, Issue 2, April-June 2012
Quarterly update providing information on environmental regulations for small businesses and local governments in Texas.
Date:
April 2012
Creator:
Texas Commission on Environmental Quality. Small Business and Environmental Assistance Division.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Afghanistan: Post-Taliban Governance, Security, and U.S. Policy
This report discusses the current political state of Afghanistan, focusing particularly on the influence of the Taliban and other militant groups and on the leadership of Afghan President Hamid Karzai. This report also discusses the U.S.-Afghanistan relationship, in both the short and long term, and U.S. efforts under the Obama Administration to provide military, reconstructive, and stabilization aid.
Date:
April 4, 2012
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library
Ag on Si(111) from basic science to application
In our work we revisit Ag and Au adsorbates on Si(111)-7x7, as well as experiment with a ternary system of Pentacene, Ag and Si(111). Of particular interest to us is the Si(111)-({radical}3x{radical}3)R30{degree}–Ag (Ag-Si-{radical}3 hereafter). In this thesis I systematically e plore effects of Ag deposition on the Ag-Si-{radical}3 at different temperatures, film thicknesses and deposition fluxes. The generated insight of the Ag system on the Si(111) is then applied to generate novel methods of nanostructuring and nanowire growth. I then extend our expertise to the Au system on the Ag-Si(111) to gain insight into Au-Si eutectic silicide formation. Finally we explore behavior and growth modes of an organic molecule on the Ag-Si interface.
Date:
April 4, 2012
Creator:
Belianinov, Aleksey
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Agency Operations: Agencies Must Continue to Comply with Fiscal Laws Despite the Possibility of Sequestration
Testimony issued by the Government Accountability Office with an abstract that begins "The Budget Control Act of 2011, amending the Balanced Budget and Emergency Deficit Control Act of 1985, establishes limits on discretionary spending for fiscal years 2012 through 2021. In addition, the Act specifies additional limits on discretionary spending and automatic reductions in direct spending because legislation was not enacted that would reduce projected deficits by at least $1.2 trillion by the end of fiscal year 2021. Among other things, the Budget Control Act requires the Office of Management and Budget (OMB) to calculate, and the President to order, a sequestration of discretionary and direct spending on January 2, 2013, to achieve reductions for that fiscal year."
Date:
April 25, 2012
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
[Agenda: The Dallas Way, April 3, 2012]
Agenda for the April 3rd meeting of the Dallas Way, including topics such as current reports and new Dallas Way business.
Date:
April 3, 2012
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Agenda: The Dallas Way, April 3, 2012]
Agenda for the April 3rd meeting of the Dallas Way listing the order in which topics will be discussed in the organization's meeting.
Date:
April 3, 2012
Creator:
The Dallas Way
Object Type:
Text
System:
The UNT Digital Library
Air Emissions and Electricity Generation at U.S. Power Plants
Correspondence issued by the Government Accountability Office with an abstract that begins "Older electricity generating unitsthose that began operating in or before 1978provided 45 percent of electricity from fossil fuel units in 2010 but produced a disproportionate share of emissions, both in aggregate and per unit of electricity generated. Overall, in 2010 older units contributed 75 percent of sulfur dioxide emissions, 64 percent of nitrogen oxides emissions, and 54 percent of carbon dioxide emissions from fossil fuel units. For each unit of electricity generated, older units collectively emitted about 3.6 times as much sulfur dioxide, 2.1 times as much nitrogen oxides, and 1.3 times as much carbon dioxide as newer units. The difference in emissions between older units and their newer counterparts may be attributed to a number of factors. First, 93 percent of the electricity produced by older fossil fuel units in 2010 was generated by coal-fired units. Compared with natural gas units, coal-fired units produced over 90 times as much sulfur dioxide, twice as much carbon dioxide and over five times as much nitrogen oxides per unit of electricity, largely because coal contains more sulfur and carbon than natural gas. Second, fewer older units have installed emissions controls, …
Date:
April 18, 2012
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 136, No. 46, Ed. 1 Thursday, April 5, 2012
Weekly newspaper from Albany, Texas that includes local, state and national news along with advertising.
Date:
April 5, 2012
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 136, No. 47, Ed. 1 Thursday, April 12, 2012
Weekly newspaper from Albany, Texas that includes local, state and national news along with advertising.
Date:
April 12, 2012
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 136, No. 48, Ed. 1 Thursday, April 19, 2012
Weekly newspaper from Albany, Texas that includes local, state and national news along with advertising.
Date:
April 19, 2012
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 136, No. 49, Ed. 1 Thursday, April 26, 2012
Weekly newspaper from Albany, Texas that includes local, state and national news along with advertising.
Date:
April 26, 2012
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
Algae Biofuels Collaborative Project: Cooperative Research and Development Final Report, CRADA Number CRD-10-371
The goal of this project is to advance biofuels research on algal feedstocks and NREL's role in the project is to explore novel liquid extraction methods, gasification and pyrolysis as means to produce fuels from algae. To that end several different extraction methods were evaluated and numerous gasification and pyrolysis conditions were explored. It was found that mild hydrothermal treatment is a promising means to improve the extraction and conversion of lipids from algae over those produced by standard extraction methods. The algae were essentially found to gasify completely at a fairly low temperature of 750 degrees C in the presence of oxygen. Pyrolysis from 300-550 degrees C showed sequential release of phytene hydrocarbons, glycerides, and aromatics as temperature was increased. It appears that this has potential to release the glycerides from the non-fatty acid groups present in the polar lipids to produce a cleaner lipid. Further research is needed to quantify the pyrolysis and gasification yields, analyze the liquids produced and to test strategies for removing organic-nitrogen byproducts produced because of the high protein content of the feed. Possible strategies include use of high-lipid/low-protein algae or the use of catalytic pyrolysis.
Date:
April 1, 2012
Creator:
French, R. J.
Object Type:
Report
System:
The UNT Digital Library
An Alternative View of the Dynamical Origin of the P11 Nucleon Resonances: Results from the Excited Baryon Analysis Center
We present an alternative interpretation for the dynamical origin of the P{sub 11} nucleon resonances, which results from the dynamical coupled-channels analysis at Excited Baryon Analysis Center of Jefferson Lab. The results indicate the crucial role of the multichannel reaction dynamics in determining the N* spectrum. An understanding of the spectrum and structure of the excited nucleon (N*) states is a fundamental challenge in the hadron physics. The N* states, however, couple strongly to the meson-baryon continuum states and appear only as resonance states in the {gamma}N and {pi}N reactions. One can expect from such strong couplings that the (multichannel) reaction dynamics will affect significantly the N* states and cannot be neglected in extracting the N* parameters from the data and giving physical interpretations. It is thus well recognized nowadays that a comprehensive study of all relevant meson production reactions with {pi}N,{eta}N,{pi}{pi}N,KY, {hor_ellipsis} final states is necessary for a reliable extraction of the N* parameters. To address this challenging issue, the Excited Baryon Analysis Center (EBAC) of Jefferson Lab has been conducting the comprehensive analysis of the world data of {gamma}N,{pi}N {yields} {pi}N,{eta}N,{pi}{pi}N,KY, {hor_ellipsis} reactions systematically, covering the wide energy and kinematic regions. The analysis is pursued with a dynamical …
Date:
April 1, 2012
Creator:
Kamano, Hiroyuki
Object Type:
Article
System:
The UNT Digital Library