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Economic and Other Implications of Switching from Coal to Natural Gas at the Capitol Power Plant and at Electricity-Generating Units Nationwide

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "Elevated concentrations of greenhouse gases--carbon dioxide, methane, nitrous oxide, and several synthetic chemicals--in the atmosphere resulting from the combustion of fossil fuels and other sources have the potential to cause significant changes in the earth's climate. These potential impacts include shifts in sea level and weather patterns and could pose threats to coastal and other infrastructure. Co… more
Date: May 1, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

U.S. Capitol Police: Status of Efforts to Address Prior GAO Recommendations on Administrative and Management Operations

Description: Testimony issued by the Government Accountability Office with an abstract that begins "The United States Capitol Police (USCP) is responsible for securing the 276-acre Capitol Complex, including protecting Members of Congress, visitors, and congressional facilities. In response to heightened security concerns, various requests, and legislative mandates over the years, GAO has reported on management control problems in five key areas: (1) establishing an accountability framework for monitoring r… more
Date: May 1, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Higher Education: Multiple Higher Education Tax Incentives Create Opportunities for Taxpayers to Make Costly Mistakes

Description: Testimony issued by the Government Accountability Office with an abstract that begins "Federal assistance helps students and families pay for postsecondary education through several policy tools--grant and loan programs authorized by Title IV of the Higher Education Act of 1965 and more recently enacted tax preferences. This testimony summarizes our 2005 report and provides updates on (1) how Title IV assistance compares to that provided through the tax code (2) the extent to which tax filers e… more
Date: May 1, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Defense Infrastructure: Planning Efforts for the Proposed Military Buildup on Guam Are in Their Initial Stages, with Many Challenges Yet to Be Addressed

Description: Testimony issued by the Government Accountability Office with an abstract that begins "To reduce the burden of the U.S. military presence on Japanese communities while maintaining a continuing presence of U.S. forces in the region, in 2005 and 2006 the U.S.-Japan Defense Policy Review Initiative outlined the effort to relocate American military units in Japan to other areas, including Guam. The Department of Defense (DOD) plans to move 8,000 Marines and an estimated 9,000 dependents from Okinaw… more
Date: May 1, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

High Penetration, Grid Connected Photovoltaic Technology Codes and Standards: Preprint

Description: This paper reports the interim status in identifying and reviewing photovoltaic (PV) codes and standards (C&S) and related electrical activities for grid-connected, high-penetration PV systems with a focus on U.S. electric utility distribution grid interconnection.
Date: May 1, 2008
Creator: Basso, T. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Use of microphysical relationships to discern growth/decay mechanisms of cloud droplets with focus on Z-LWC relationships.

Description: Cloud droplet size distributions hence the key microphysical quantities (e.g., radar reflectivity, droplet concentration, liquid water content, relative dispersion, and mean-volume radius) are determined by different physical mechanisms, including pre-cloud aerosols as CCNs, cloud updraft, and various turbulent entrainment-mixing processes. Therefore, different relationships among these microphysical properties are expected in response to these various mechanisms. The effect of turbulent entrai… more
Date: May 1, 2008
Creator: Liu, Y.; Daum, P. H.; Yum, S. S. & Wang, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ACRF Instrumentation Status: New, Current, and Future - May 2008

Description: The purpose of this report is to provide a concise but comprehensive overview of Atmospheric Radiation Measurement Climate Research Facility instrumentation status. The report is divided into the following five sections: (1) new instrumentation in the process of being acquired and deployed, (2) field campaigns, (3) existing instrumentation and progress on improvements or upgrades, (4) proposed future instrumentation, and (5) Small Business Innovation Research instrument development.
Date: May 1, 2008
Creator: Voyles, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Where do fossil fuel carbon dioxide emissions from California go? An analysis based on radiocarbon observations and an atmospheric transport model

Description: Characterizing flow patterns and mixing of fossil fuel-derived CO{sub 2} is important for effectively using atmospheric measurements to constrain emissions inventories. Here we used measurements and a model of atmospheric radiocarbon ({sup 14}C) to investigate the distribution and fluxes of atmospheric fossil fuel CO{sub 2} across the state of California. We sampled {sup 14}C in annual C{sub 3} grasses at 128 sites and used these measurements to test a regional model that simulated anthropogeni… more
Date: May 1, 2008
Creator: Riley, W. J.; Hsueh, D. Y.; Randerson, J. T.; Fischer, M. L.; Hatch, J. G.; Pataki, D. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

Intrinsic DX Centers in Ternary Chalcopyrite Semiconductors

Description: The conclusions of this report are: (1) intrinsic donor-type defects In{sub Cu}, Ga{sub Cu}, and V{sub Se}, and their complexes with V{sub Cu} cause metastability, but also act to limit V{sub OC}; (2) growth conditions which minimize these defects (Cu-rich/Se-rich) are very different from those currently used; and (3) overcoming V{sub OC} limitation requires to address other issues and trade-offs.
Date: May 1, 2008
Creator: Lany, S. & Zunger, A.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
open access

Help for the Developers of Control System Cyber Security Standards

Description: A Catalog of Control Systems Security: Recommendations for Standards Developers (Catalog), aimed at assisting organizations to facilitate the development and implementation of control system cyber security standards, has been developed. This catalog contains requirements that can help protect control systems from cyber attacks and can be applied to the Critical Infrastructures and Key Resources of the United States and other nations. The requirements contained in the catalog are a compilation o… more
Date: May 1, 2008
Creator: Evans, Robert P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Silicon Solar Cells with Front Hetero-contact and Aluminum Alloy Back Junction (Poster)

Description: The objectives of this report are: (1) to apply industrial back Al process in efficient n-wafer cells with a-Si:H front surface passivation; and (2) to evaluate the surface recombination velocity (SRV) of the a-Si:H passivated front surface with different surface preparation procedures.
Date: May 1, 2008
Creator: Yuan, H.-C.; Page, M. R.; Iwaniczko, E.; Xu, Y.; Roybal, L.; Wang, Q. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

RHIC RF Harmonic Numbers for Low Energy Operations

Description: There have been several test runs of RHIC operations to explore the feasibility of luminosity production at low energies. There is considerable international interest in the possible existence of a QCD phase diagram critical point in the RHIC gold-gold collision energy range of {radical}s{sub NN} = 5-50 GeV[l, 2, 3]. This paper reviews the RF harmonic number constraints for RHIC gold-gold collisions in this energy range, and concludes that optimal simultaneous collisions at both experiments are… more
Date: May 1, 2008
Creator: Satogata, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest

Description: Wind power production is variable, but also has diurnal and seasonal patterns. These patterns differ between sites, potentially making electric power from some wind sites more valuable for meeting customer loads or selling in wholesale power markets. This paper investigates whether the timing of wind significantly affects the value of electricity from sites in California and the Northwestern United States. We use both measured and modeled wind data and estimate the time-varying value of wind po… more
Date: May 1, 2008
Creator: Wiser, Ryan H; Wiser, Ryan H & Fripp, Matthias
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

Design of Shallow p-type Dopants in ZnO

Description: ZnO is a promising material for short wave-length opto-electronic devices such as UV lasers and LEDs due to its large exciton binding energy and low material cost. ZnO can be doped easily n-type, but the realization of stable p-type ZnO is rather difficult. Using first-principles band structure methods the authors address what causes the p-type doping difficulty in ZnO and how to overcome the p-type doping difficulty in ZnO.
Date: May 1, 2008
Creator: Wei, S.H.; Li, J. & Y., Yan.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
open access

Corrective Action Decision Document/Closure Report for Corrective Action Unit 234: Mud Pits, Cellars, and Mud Spills Nevada Test Site, Nevada, Revision 0

Description: This Corrective Action Decision Document/Closure Report has been prepared for Corrective Action Unit (CAU) 234, Mud Pits, Cellars, and Mud Spills, located in Areas 2, 3, 4, 12, and 15 at the Nevada Test Site, Nevada, in accordance with the Federal Facility Agreement and Consent Order (FFACO, 1996; as amended February 2008). Corrective Action Unit 234 is comprised of the following 12 corrective action sites: •02-09-48, Area 2 Mud Plant #1 •02-09-49, Area 2 Mud Plant #2 •02-99-05, Mud Spill •03-0… more
Date: May 1, 2008
Creator: Evenson, Grant
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Observation of Disappearance of Muon Neutrinos in the NuMI Beam

Description: The Main Injector Neutrino Oscillation Search (MINOS) is a two detector long-baseline neutrino experiment designed to study the disappearance of muon neutrinos. MINOS will test the {nu}{sub {mu}} {yields} {nu}{sub {tau}} oscillation hypothesis and measure precisely {Delta}m{sub 23}{sup 2} and sin{sup 2} 2{theta}{sub 23} oscillation parameters. The source of neutrinos for MINOS experiment is Fermilab's Neutrinos at the Main Injector (NuMI) beamline. The energy spectrum and the composition of the… more
Date: May 1, 2008
Creator: Pavlovic, Zarko
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Search for the Flavor Changing Neutral Current Decay t $\to Zq$ in $p \bar{p}$ Collisions at $\sqrt{s}=1.96$

Description: We report a search for the flavor changing neutral current (FCNC) decay of the top quark t {yields} Zq (q = u, c) in p{bar p} collisions at {radical}s = 1.96 TeV using a data sample corresponding to an integrated luminosity of 1.9 fb{sup -1} collected by the CDF II detector. This decay is strongly suppressed in the standard model (SM) and a signal at the Tevatron would be an indication of physics beyond the SM. Using Z+ {ge} 4 jet final state candidate events, both with and without an identifie… more
Date: May 1, 2008
Creator: Aaltonen, : T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Radiation damage due to electromagnetic showers

Description: Radiation-induced damage due to atomic displacements is essential to correctly predict the behavior of materials in nuclear reactors and at charged-particle accelerators. Traditionally the damage due to hadrons was of major interest. The recent increased interest in high-energy lepton colliders gave rise to the problem of prediction of radiation damage due to electromagnetic showers in a wide energy range--from a few hundred keV and up to a few hundred GeV. The report describes results of an el… more
Date: May 1, 2008
Creator: Rakhno, Igor; Mokhov, Nikolai & Striganov, Sergei
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling Microbunching from Shot Noise Using Vlasov Solvers

Description: Unlike macroparticle simulations, which are sensitive to unphysical statistical fluctuations when the number of macroparticles is smaller than the bunch population, direct methods for solving the Vlasov equation are free from sampling noise and are ideally suited for studying microbunching instabilities evolving from shot noise. We review a 2D (longitudinal dynamics) Vlasov solver we have recently developed to study the microbunching instability in the beam delivery systems for x-ray FELs and p… more
Date: May 1, 2008
Creator: Venturini, Marco; Venturini, Marco & Zholents, Alexander
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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