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Homeland Security: Ongoing Challenges Impact the Federal Protective Service's Ability to Protect Federal Facilities

Description: Testimony issued by the Government Accountability Office with an abstract that begins "Recent events including last month's attack on Internal Revenue Service offices in Texas, and the January 2010 shooting in the lobby of the Nevada, federal courthouse demonstrate the continued vulnerability of federal facilities and the safety of the federal employees who occupy them. These events also highlight the continued challenges involved in protecting federal real property and reiterate the importance… more
Date: March 16, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

U.S. Insular Areas: Opportunities Exist to Improve Interior's Grant Oversight and Reduce the Potential for Mismanagement

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. insular areas of American Samoa, the Commonwealth of the Northern Mariana Islands (CNMI), Guam, and the U.S. Virgin Islands (USVI) face serious economic and fiscal challenges and rely on federal funding to deliver critical services. The Department of the Interior (Interior), through its Office of Insular Affairs (OIA), provides roughly $70 million in grant funds annually to increase insular are… more
Date: March 16, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Progress report of the Interagency Climate Change Adaptation Task Force

Description: This report describes work by the Interagency Climate Change Task Force. The group's goals include forming recommendations for a national strategy for climate change adaptation, improving the resilience and adaptive capacity of the federal government towards climate change, and improving public understanding of specific climate change vulnerabilities.
Date: March 16, 2010
Creator: United States. Interagency Climate Change Adaptation Task Force.
Item Type: Refine your search to only Text
Partner: UNT Libraries
open access

Direction-Preserving and Schur-Monotonic Semi-Separable Approximations of Symmetric Positive Definite Matrices}

Description: For a given symmetric positive definite matrix A {element_of} R{sup N x N}, we develop a fast and backward stable algorithm to approximate A by a symmetric positive-definite semi-separable matrix, accurate to a constant multiple of any prescribed tolerance. In addition, this algorithm preserves the product, AZ, for a given matrix Z {element_of} R{sup N x d}, where d << N. Our algorithm guarantees the positive-definiteness of the semi-separable matrix by embedding an approximation strategy… more
Date: March 16, 2010
Creator: Gu, M.; Li, X. S. & Vassilevski, P. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Precision Measurements of Tau Lepton Decays

Description: Using data collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a center-of-mass energy near 10.58 GeV, the branching fractions {Beta}({tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}}) = (8.83 {+-} 0.01 {+-} 0.13)%, {Beta}({tau}{sup -} {yields} K{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}}) = (0.273 {+-} 0.002 {+-} 0.009)%, {Beta}({tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu}{sub {tau}}) = (0.1346 {+-} 0.0010 {+-} 0.0036)… more
Date: March 16, 2010
Creator: Nugent, Ian M.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Spin Hall effects for cold atoms in a light induced gauge potential

Description: We propose an experimental scheme to observe spin Hall effects with cold atoms in a light induced gauge potential. Under an appropriate configuration, the cold atoms moving in a spatially varying laser field experience an effective spin-dependent gauge potential. Through numerical simulation, we demonstrate that such a gauge field leads to observable spin Hall currents under realistic conditions. We also discuss the quantum spin Hall state in an optical lattice.
Date: March 16, 2010
Creator: Zhu, Shi-Liang; /Michigan U., MCTP /South China Normal U.; Fu, Hao; /Michigan U., MCTP; Wu, C.-J.; /Santa Barbara, KITP et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Band Collapse and the Quantum Hall Effect in Graphene

Description: The recent Quantum Hall experiments in graphene have confirmed the theoretically well-understood picture of the quantum Hall (QH) conductance in fermion systems with continuum Dirac spectrum. In this paper we take into account the lattice, and perform an exact diagonalization of the Landau problem on the hexagonal lattice. At very large magnetic fields the Dirac argument fails completely and the Hall conductance, given by the number of edge states present in the gaps of the spectrum, is dominat… more
Date: March 16, 2010
Creator: Bernevig, B.Andrei; Hughes, Taylor L.; Zhang, Shou-Cheng; /Stanford U., Phys. Dept.; Chen, Han-Dong; /Illinois U., Urbana et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Surface current reduction of (211) oriented Cd0.46Zn0.04Te0.50 crystals by Ar bombardment

Description: Cd{sub 0.46}Zn{sub 0.04}Te{sub .50} crystals have been exposed to high density Ar plasmas in order to modify the surface chemistry and control the surface conductivity. X-ray photoelectron spectroscopy (XPS) reveals that this bombardment results in a modified surface atomic ratio, with Cd being preferentially removed compared to Te. In addition, the native oxide is removed and suppressed for an extended period of time. Current-voltage data is analyzed in order to determine the effect on surface… more
Date: March 16, 2010
Creator: Voss, L F; Beck, P R; Conway, A M; Graff, R T; Nikolic, R J; Nelson, A J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fermi Liquid Instabilities in the Spin Channel

Description: We study the Fermi surface instabilities of the Pomeranchuk type in the spin triplet channel with high orbital partial waves (F{sub l}{sup a} (l > 0)). The ordered phases are classified into two classes, dubbed the {alpha} and {beta}-phases by analogy to the superfluid {sup 3}He-A and B-phases. The Fermi surfaces in the {alpha}-phases exhibit spontaneous anisotropic distortions, while those in the {beta}-phases remain circular or spherical with topologically non-trivial spin configurations i… more
Date: March 16, 2010
Creator: Wu, Congjun; /Santa Barbara, KITP; Sun, Kai; Fradkin, Eduardo; /Illinois U., Urbana; Zhang, Shou-Cheng et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Untangling the Chemical Evolution of Titan's Atmosphere and Surface -- From Homogeneous to Heterogeneous Chemistry

Description: The arrival of the Cassini-Huygens probe at Saturn's moon Titan - the only Solar System body besides Earth and Venus with a solid surface and a thick atmosphere with a pressure of 1.4 atm at surface level - in 2004 opened up a new chapter in the history of Solar System exploration. The mission revealed Titan as a world with striking Earth-like landscapes involving hydrocarbon lakes and seas as well as sand dunes and lava-like features interspersed with craters and icy mountains of hitherto unkn… more
Date: March 16, 2010
Creator: Kaiser, Ralf I.; Maksyutenko, Pavlo; Ennis, Courtney; Zhang, Fangtong; Gu, Xibin; Krishtal, Sergey P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

New Isotope 263Hs

Description: A new isotope of Hs was produced in the reaction 208Pb(56Fe, n)263Hs at the 88-Inch Cyclotron of the Lawrence Berkeley National Laboratory. Six genetically correlated nuclear decay chains have been observed and assigned to the new isotope 263Hs. The measured cross section was 21+13-8.4 pb at 276.4 MeV lab-frame center-of-target beam energy. 263Hs decays with a half-life of 0.74 ms by alpha-decay and the measured alpha-particle energies are 10.57 +- 0.06, 10.72 +- 0.06, and 10.89 +- 0.06 MeV.… more
Date: March 16, 2010
Creator: Dragojevic, I.; Gregorich, K. E.; Dullmann, Ch. E.; Dvorak, J.; Ellison, P. A.; Gates, J. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Direct detection of pyridine formation by the reaction of CH (CD) with pyrrole: a ring expansion reaction

Description: The reaction of the ground state methylidyne radical CH (X2Pi) with pyrrole (C4H5N) has been studied in a slow flow tube reactor using Multiplexed Photoionization Mass Spectrometry coupled to quasi-continuous tunable VUV synchrotron radiation at room temperature (295 K) and 90 oC (363 K), at 4 Torr (533 Pa). Laser photolysis of bromoform (CHBr3) at 248 nm (KrF excimer laser) is used to produce CH radicals that are free to react with pyrrole molecules in the gaseous mixture. A signal at m/z = 79… more
Date: March 16, 2010
Creator: Soorkia, Satchin; Taatjes, Craig A.; Osborn, David L.; Selby, Talitha M.; Trevitt, Adam J.; Wilson, Kevin R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

Oral History Interview with Roy J. Grogan, March 16, 2010

Description: Interview with Roy J. Grogan, longtime Weatherford resident and elected official, as part of the Weatherford Oral History Project. The interview includes Grogan's personal experiences of childhood and education in Weatherford, Depression-era struggles, enlisting in the U.S. Navy, and World War II. Additionally, Grogan talks about his studies at Weatherford College, Duke University, and Duke Law, his legal career with the FBI and as a land developer, his political career on the Weatherford City … more
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: March 16, 2010
Creator: Liles, Debbie & Grogan, Roy J.
Item Type: Refine your search to only Book
Partner: UNT Oral History Program
open access

Federal Stafford Act Disaster Assistance: Presidential Declarations, Eligible Activities, and Funding

Description: This report provides an overview of the Stafford Act and Stafford Act declarations. The report discusses the types of assistance and eligibility, funding caps and cost shares, hazard mitigation assistance, disaster relief funds, and other issues for the 111th Congress.
Date: March 16, 2010
Creator: Bea, Keith
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Terrorism and Security Issues Facing the Water Infrastructure Sector

Description: This report presents an overview of the large and diverse sector of water infrastructure systems, describes security-related actions by the government and private sector since September 11, 2001, and discusses additional policy issues and responses, including congressional interest.
Date: March 16, 2010
Creator: Copeland, Claudia
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Interim Continuing Resolutions (CRs): Potential Impacts on Agency Operations

Description: This report discusses how an interim continuing resolutions (CRs), provisions and requirements may impact directly upon an agency. Second, the report analyzes Office of Management and Budget (OMB) and agency documents that have provided guidance or requirements for how an agency should navigate through periods of interim CRs. Third, the report analyzes brief mentions of claims of impact contained in Government Accountability Office (GAO) reports from a 20-year span.
Date: March 16, 2010
Creator: Brass, Clinton T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Urban Search and Rescue Task Forces: Facts and Issues

Description: This report discusses Urban Search and Rescue (USAR) Task Forces, which have been certified, trained, and funded by the federal government. The task forces represent a partnership involving federal, local government, and private sector experts. Most recently, USAR teams received considerable publicity, and reportedly achieved life-saving results, in their mission to Haiti after the earthquakes of early 2010.
Date: March 16, 2010
Creator: Bea, Keith
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Political Status of Puerto Rico: Options for Congress

Description: This report discusses the current U.S.-Puerto Rico relationship, the history of said relationship, and the current political state of Puerto Rico, as well as relevant pieces of U.S. Congressional legislation concerning Puerto Rico.
Date: March 16, 2010
Creator: Bea, Keith & Garrett, R. Sam
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Emergency Communications: The Future of 911

Description: This report discusses possible paths toward the modernization of the 911 infrastructure. Efforts to splice newer, digital technologies onto the aging infrastructure have created points of failure where a call can be dropped or misdirected, sometimes with tragic consequences.
Date: March 16, 2010
Creator: Moore, Linda K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Libya: Background and U.S. Relations

Description: This report discusses the recent revolution in Libya, from its 2011 uprising to the end of the Qadhafi era. It specifically looks at Libya's weapons of mass destruction (WMD) disarmament, political reform and human rights, and energy as it relates to the Libyan economy.
Date: March 16, 2010
Creator: Blanchard, Christopher M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The International Criminal Court (ICC): Jurisdiction, Extradition, and U.S. Policy

Description: This report focuses on the process by which the Office of the Prosecutor investigates allegations of war crimes and second on U.S policy towards the International Criminal Court (ICC) and how the court might assert jurisdiction over U.S. nationals.
Date: March 16, 2010
Creator: Barbour, Emily C. & Weed, Matthew C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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