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Plan Colombia: Drug Reduction Goals Were Not Fully Met, but Security Has Improved; U.S. Agencies Need More Detailed Plans for Reducing Assistance

Description: A letter report issued by the Government Accountability Office with an abstract that begins "In September 1999, the government of Colombia announced a strategy, known as "Plan Colombia," to (1) reduce the production of illicit drugs (primarily cocaine) by 50 percent in 6 years and (2) improve security in Colombia by re-claiming control of areas held by illegal armed groups. Since fiscal year 2000, the United States has provided over $6 billion to support Plan Colombia. The Departments of State,… more
Date: October 6, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Top Jets at the LHC

Description: We investigatethe reconstruction of high pT hadronically-decaying top quarksat the Large Hadron Collider. One of the main challenges in identifying energetictop quarks is that the decay products become increasingly collimated. This reducesthe efficacy of conventional reconstruction methods that exploit the topology of thetop quark decay chain. We focus on the cases where the decay products of the topquark are reconstructed as a single jet, a"top-jet." The most basic"top-tag"… more
Date: October 6, 2008
Creator: Almeida, L.G.; Lee, S.J.; Perez, G.; Sung, I. & Virzi, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effect of various errors on the Spin Tune and Stable Spin Axis

Description: Even though RHIC has two full Siberian snakes in each ring, there are various perturbations to the ideal case including orbit errors at the snakes, experiment solenoids, injection bumps, and interlaced horizontal-vertical bumps at the hydrogen jet polarimeter. These errors can cause depolarization by shifting the spin tune and tilting the stable spin direction away from vertical. Tilting of the stable spin axis can enhance horizontal depolarizing resonances. This paper presents preliminary resu… more
Date: October 6, 2008
Creator: MacKay, W. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CIBS Solar Cell Development

Description: This research focused on efforts to prepare and characterize the first copper-indium-boron-diselenide (CIBS) photovoltaic materials. Attempts to fabricate CIBS in thin-film form followed a three-step process: 1) RF sputtering of copper, indium, and boron to form a copper-indium-boron (CIB) alloy; 2) ex-situ selenization of CIB via physical vapor deposition; 3) annealing the final product. No CIBS materials were produced with this method due to the formation of an unstable boron diselenide speci… more
Date: October 6, 2008
Creator: Exstrom, Christopher L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiative Leptonic B Decays

Description: We present the results of a search for B{sup +} meson decays into {gamma}{ell}{sup +}{nu}{sub {ell}}, where {ell} = e,{mu}. We use a sample of 232 million B{bar B} meson pairs recorded at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II B factory. We measure a partial branching fraction {Delta}{beta} in a restricted region of phase space that reduces the effect of theoretical uncertainties, requiring the lepton energy to be in the range 1.875 and 2.850 GeV, the photon energy to… more
Date: October 6, 2008
Creator: Chen, Edward Tann & /Caltech
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

QCD Corrections in Transversely Polarized Scattering

Description: We discuss two recent calculations of higher-order QeD corrections to scattering of transversely polarized hadrons. A basic concept underlying much of the theoretical description of high-energy hadronic scattering is the factorization theorem, which states that large momentum-transfer reactions may be factorized into long-distance pieces that contain information on the structure of the nucleon in terms of its parton densities, and parts that are short-distance and describe the hard interactions… more
Date: October 6, 2008
Creator: Vogelsang, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

RHIC Polarized proton performance in run-8

Description: During Run-8, the Relativistic Heavy Ion Collider (RHIC) provided collisions of spin-polarized proton beams at two interaction regions. Physics data were taken with vertical orientation of the beam polarization, which in the 'Yellow' RHIC ring was significantly lower than in previous years. We present recent developments and improvements as well as the luminosity and polarization performance achieved during Run-8, and we discuss possible causes of the not as high as previously achieved polariza… more
Date: October 6, 2008
Creator: Montag, C.; Bai, M.; MacKay, W. W.; Roser, T.; Abreu, N.; Ahrens, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Selection and Implementation of a Replacement Cutting Tool Selection Application

Description: A new commercial cutting tool software package replaced an internally created legacy system. This report describes the issues that surfaced during the migration and installation of the commercial package and the solutions employed. The primary issues discussed are restructuring the data between two drastically different database schemas and the creation of individual component graphics.
Date: October 6, 2008
Creator: Rice, Gordon
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spin resonance strength calculations

Description: In calculating the strengths of depolarizing resonances it may be convenient to reformulate the equations of spin motion in a coordinate system based on the actual trajectory of the particle, as introduced by Kondratenko, rather than the conventional one based on a reference orbit. It is shown that resonance strengths calculated by the conventional and the revised formalisms are identical. Resonances induced by radiofrequency dipoles or solenoids are also treated; with rf dipoles it is essentia… more
Date: October 6, 2008
Creator: Courant, E. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Predicting Efficient Antenna Ligands for Tb(III) Emission

Description: A series of highly luminescent Tb(III) complexes of para-substituted 2-hydroxyisophthalamide ligands (5LI-IAM-X) has been prepared (X = H, CH{sub 3}, (C=O)NHCH{sub 3}, SO{sub 3}{sup -}, NO{sub 2}, OCH{sub 3}, F, Cl, Br) to probe the effect of substituting the isophthalamide ring on ligand and Tb(III) emission in order to establish a method for predicting the effects of chromophore modification on Tb(III) luminescence. The energies of the ligand singlet and triplet excited states are found to in… more
Date: October 6, 2008
Creator: Samuel, Amanda P.S.; Xu, Jide & Raymond, Kenneth
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Photoproduction at RHIC and the LHC

Description: The strong electromagnetic fields carried by relativistic highly charged ions make heavy-ion colliders attractive places to study photonuclear interactions and two-photon interactions. At RHIC, three experiments have studied coherent photoproduction of {rho}{sup 0}, 4{pi}, J/{psi}, e{sup +}e{sup -} pairs, and e{sup +}e{sup -} pairs where the electron is bound to one of the incident nuclei. These results show that photoproduction studies are possible, and demonstrate some of the unique possibili… more
Date: October 6, 2008
Creator: Klein, Spencer
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tough, bio-inspired hybrid materials

Description: The notion of mimicking natural structures in the synthesis of new structural materials has generated enormous interest but has yielded few practical advances. Natural composites achieve strength and toughness through complex hierarchical designs extremely difficult to replicate synthetically. Here we emulate Nature's toughening mechanisms through the combination of two ordinary compounds, aluminum oxide and polymethylmethacrylate, into ice-templated structures whose toughness can be over 300 t… more
Date: October 6, 2008
Creator: Munch, Etienne; Launey, Maximimilan E.; Alsem, Daan H.; Saiz, Eduardo; Tomsia, Antoni P. & Ritchie, Robert O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NATO Enlargement: Albania, Croatia, and Possible Future Candidates

Description: This report discusses the current status of NATO membership following the April 2-4, 2008 NATO summit in Bucharest, Romania. A principal issue was consideration of the candidacies for membership of Albania, Croatia, and Macedonia. The allies agreed to extend invitations to Albania and Croatia. Although the alliance determined that Macedonia met the qualifications for NATO membership, Greece blocked the invitation due to an enduring dispute over Macedonia's name.
Date: October 6, 2008
Creator: Morelli, Vincent; Ek, Carl; Belkin, Paul; Woehrel, Steven & Nichol, Jim
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pipeline Safety and Security: Federal Programs

Description: This report discusses congressional interest in securing the nation's pipelines. Nearly half a million miles of oil and natural gas transmission pipeline crisscross the United States. While an efficient and fundamentally safe means of transport, many pipelines carry hazardous materials with the potential to cause public injury and environmental damage.
Date: October 6, 2008
Creator: Parfomak, Paul W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Brazil-U.S. Relations

Description: This report analyzes Brazil's political, economic, and social conditions, and how those conditions affect its role in the region and its relationship with the United States.
Date: October 6, 2008
Creator: Seelke, Clare Ribando & Durand, Alessandra
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Administering Green Programs in Congress: Issues and Options

Description: This report discusses "green" programs and the higher profile they have gained in the 110th Congress. "Green" programs are those designed to create an environmentally friendly work environment and conserve energy. This report discusses initiatives and policy options that would improve the "greening" process on Capitol Hill.
Date: October 6, 2008
Creator: Straus, Jacob R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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