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Experimental probes of axions
Experimental searches for axions or axion-like particles rely on semiclassical phenomena resulting from the postulated coupling of the axion to two photons. Sensitive probes of the extremely small coupling constant can be made by exploiting familiar, coherent electromagnetic laboratory techniques, including resonant enhancement of transitions using microwave and optical cavities, Bragg scattering, and coherent photon-axion oscillations. The axion beam may either be astrophysical in origin as in the case of dark matter axion searches and solar axion searches, or created in the laboratory from laser interactions with magnetic fields. This note is meant to be a sampling of recent experimental results.
Date:
October 1, 2009
Creator:
Chou, Aaron S.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, October 1, 2009
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 1, 2009
Creator:
Pittman, Jerry & Wray, Kelly
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Extending ACNET communication types to include multicast semantics
In Fermilab's accelerator control system, multicast communication wasn't properly incorporated into ACNET's transport layer, nor in its programming API. We present some recent work that makes multicasts naturally fit in the ACNET network environment. We also show how these additions provide high-availability for ACNET services.
Date:
October 1, 2009
Creator:
Neswold, R. & King, C.
Object Type:
Article
System:
The UNT Digital Library
Federal Fleet Files, FEMP, Vol. 2, No. 1 - October 2009 (Fact Sheet)
October 2009 issue of monthly news from the FEMP Federal Fleet Program that outlines vehicle, alternative fuel, infrastructure, and management strategy updates to Federal agencies.
Date:
October 1, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Fermilab Proton Beam for Mu2e
Plans to use existing Fermilab facilities to provide beam for the Muon to Electron Conversion Experiment (Mu2e) are under development. The experiment will follow the completion of the Tevatron Collider Run II, utilizing the beam lines and storage rings used today for antiproton accumulation without considerable reconfiguration. The proposed Mu2e operating scenario is described as well as the accelerator issues being addressed to meet the experimental goals.
Date:
October 1, 2009
Creator:
Syphers, M. J.
Object Type:
Article
System:
The UNT Digital Library
Final Development and test preparation of the first 3.7m long Nb3Sn quadrupole by LARP
The test of the first LARP (LHC Accelerator Research Program) Long Quadrupole is a significant milestone toward the development of Nb{sub 3}Sn quadrupoles for LHC (Large Hadron Collider) Luminosity Upgrades. These 3.7-m long magnets, scaled from the 1-m long Technological Quadrupoles, are used to develop our capabilities to fabricate and assemble Nb{sub 3}Sn coils and structures with lengths comparable to accelerator magnet dimensions. The long quadruples have a target gradient of 200 T/m in a 90-mm aperture. Pre-stress and support are provided by an Al-shell-based structure pre-loaded using bladders and keys. The coils were fabricated at BNL and FNAL, the shell-based structure was designed and assembled at LBNL, the test is performed at FNAL. In this paper we present the final steps of the development of the first model (LQS01), several upgrades to the test facility, the test results of witness cables, and the short sample limit.
Date:
October 1, 2009
Creator:
Ambrosio, G.; Andreev, N.; Anerella, M.; Barzi, E.; Bingham, B.; Bocian, D. et al.
Object Type:
Article
System:
The UNT Digital Library
The Final Measurement of Epsilon'/Epsilon from KTeV
The authors present precise measurements of CP and CPT symmetry based on the full dataset of K {yields} {pi}{pi} decays collected by the KTeV experiment at Fermi National Accelerator Laboratory during 1996, 1997, and 1999. This dataset contains about 15 million K {yields} {pi}{sup 0}{pi}{sup 0} and 70 million K {yields} {pi}{sup +}{pi}{sup -} decays. They measure the direct CP violation parameter Re({epsilon}'/{epsilon}) = (19.2 {+-} 2.1) x 10{sup -4}. they find the K{sub L}-K{sub S} mass difference {Delta}m = (5265 {+-} 10) x 10{sup 6} {bar h}s{sup -1} and the K{sub S} lifetime {tau}{sub S} = (89.62 {+-} 0.05) x 10{sup -12} s. They test CPT symmetry by finding the phase of the indirect CP violation parameter {epsilon}, {phi}{sub {epsilon}} = (44.09 {+-} 1.00){sup o}, and the difference of the relative phases between the CP violating and CP conserving decay amplitudes for K {yields} {pi}{sup +}{pi}{sup -} ({phi}{sub +-}) and for K {yields} {pi}{sup 0}{pi}{sup 0} ({phi}{sub 00}), {Delta}{phi} = (0.29 {+-} 0.31){sup o}. these results are consistent with other experimental results and with CPT symmetry.
Date:
October 1, 2009
Creator:
Worcester, E.T.
Object Type:
Article
System:
The UNT Digital Library
Final report LDRD project 105816 : model reduction of large dynamic systems with localized nonlinearities.
Advanced computing hardware and software written to exploit massively parallel architectures greatly facilitate the computation of extremely large problems. On the other hand, these tools, though enabling higher fidelity models, have often resulted in much longer run-times and turn-around-times in providing answers to engineering problems. The impediments include smaller elements and consequently smaller time steps, much larger systems of equations to solve, and the inclusion of nonlinearities that had been ignored in days when lower fidelity models were the norm. The research effort reported focuses on the accelerating the analysis process for structural dynamics though combinations of model reduction and mitigation of some factors that lead to over-meshing.
Date:
October 1, 2009
Creator:
Lehoucq, Richard B.; Segalman, Daniel Joseph; Hetmaniuk, Ulrich L. & Dohrmann, Clark R.
Object Type:
Report
System:
The UNT Digital Library
First Observation of Accelerator Muon Antineutrinos in MINOS
We report the first direct observation of muon antineutrinos in the MINOS Far Detector in the current muon-neutrino dominated beam. The magnetic field of the detector is utilized to separate muon neutrinos and antineutrinos event-by-event by identifying the charge sign of the muon created in charged-current interactions. We present preliminary results on the {bar {nu}}{sub {mu}} oscillation parameters as well as limit on the fraction of neutrinos that disappear and reappear as antineutrinos. We also discuss the prospect of the measurement when the polarity of the magnetic focusing horns will be reversed to create a dedicated muon antineutrino beam.
Date:
October 1, 2009
Creator:
Danko, Istvan
Object Type:
Article
System:
The UNT Digital Library
First Observation of Diboson Production in Hadronic Final State at the Tevatron
We present the first observation in hadronic collisions of the electroweak production of vector boson pairs (VV; V = W,Z) where one boson decays to a hadronic final state. The data correspond to 3.5 fb{sup -1} of integrated luminosity collected by the CDF II detector in p{bar p} collisions at a center-of-mass energy of 1.96 TeV. Event selection requires two identified jets and large transverse momentum imbalance. The analysis employs several novel techniques to suppress multijet background and reduce systematic uncertainties. We observe 1516 {+-} 239(stat) {+-} 144(syst) diboson candidate events and measure a cross section of {sigma}(p{bar p} {yields} VV + X) = 18.0 {+-} 2.8(stat) {+-} 2.4(syst) {+-} 1.1(lumi) pb, in agreement with standard model (SM) expectations.
Date:
October 1, 2009
Creator:
Pursley, J.
Object Type:
Article
System:
The UNT Digital Library
Fiscal Year 2009 Revegetation Assessment
This report summarizes the Fiscal Year 2009 Revegetation Assessment by Battelle Energy Alliance, LLC. This assessment was conducted to supplement documentation related to the Storm Water Pollution Prevention Plan for Construction Activities and to ensure that disturbed vegetation and soil at various locations are being restored. This report provides the following information for each site being monitored by the Idaho National Laboratory Environmental Support and Services: • Summary of each site • Assessment of vegetation status and site stabilization at each location • Recommendation(s) for each site.
Date:
October 1, 2009
Creator:
Lewis, Michael
Object Type:
Report
System:
The UNT Digital Library
Frequently Asked Questions: About Federal Fleet Management (Brochure)
Answers to frequently asked questions about Federal fleet management, Federal requirements, reporting, advanced vehicles, and alternative fuels.
Date:
October 1, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
From Tragedy to Triumph - Rebuilding Green Buildings after Disaster, EERE (Fact Sheet)
Fact sheet offering practical information about building energy efficient buildings and using renewable energy. Includes a checklist and resources. Highlights successful projects in Greensburg, Kansas.
Date:
October 1, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
From Tragedy to Triumph - Rebuilding with Renewable Energy after Disaster, EERE (Fact Sheet)
Fact sheet offering practical information about rebuilding using wind, geothermal, and biomass. Includes a list of resources. Highlights successful projects in Greensburg, Kansas.
Date:
October 1, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
From Tragedy to Triumph - Resources for Rebuilding Green after Disaster, EERE (Fact Sheet)
Fact sheet offering resources for builders and architects to rebuild homes, businesses, and public buildings with energy efficiency and renewable energy such as wind, solar, and geothermal.
Date:
October 1, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Fuel Cell Buses in U.S. Transit Fleets: Current Status 2009
This report documents progress in meeting the technological challenges of fuel cell propulsion for transportation based on current fuel cell transit bus demonstrations and plans for more fuel cell transit buses and hydrogen infrastructure.
Date:
October 1, 2009
Creator:
Eudy, L.; Chandler, K. & Gikakis, C.
Object Type:
Report
System:
The UNT Digital Library
Fuzzy-probabilistic calculations of water-balance uncertainty
Hydrogeological systems are often characterized by imprecise, vague, inconsistent, incomplete, or subjective information, which may limit the application of conventional stochastic methods in predicting hydrogeologic conditions and associated uncertainty. Instead, redictions and uncertainty analysis can be made using uncertain input parameters expressed as probability boxes, intervals, and fuzzy numbers. The objective of this paper is to present the theory for, and a case study as an application of, the fuzzyprobabilistic approach, ombining probability and possibility theory for simulating soil water balance and assessing associated uncertainty in the components of a simple waterbalance equation. The application of this approach is demonstrated using calculations with the RAMAS Risk Calc code, to ssess the propagation of uncertainty in calculating potential evapotranspiration, actual evapotranspiration, and infiltration-in a case study at the Hanford site, Washington, USA. Propagation of uncertainty into the results of water-balance calculations was evaluated by hanging he types of models of uncertainty incorporated into various input parameters. The results of these fuzzy-probabilistic calculations are compared to the conventional Monte Carlo simulation approach and estimates from field observations at the Hanford site.
Date:
October 1, 2009
Creator:
Faybishenko, B.
Object Type:
Article
System:
The UNT Digital Library
Garber Billings News (Garber, Okla.), Vol. 109, No. 48, Ed. 1 Thursday, October 1, 2009
Weekly newspaper from Garber, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 1, 2009
Creator:
Hogan, Vickie Lee
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Gene Expression in the Third Dimension: The ECM-nucleus Connection
Decades ago, we and others proposed that the dynamic interplay between a cell and its surrounding environment dictates cell phenotype and tissue structure. Whereas much has been discovered about the effects of extracellular matrix molecules on cell growth and tissue specific gene expression, the nuclear mechanisms through which these molecules promote these physiological events remain unknown. Using mammary epithelial cells as a model, the purpose of this review is to discuss how the extracellular matrix influences nuclear structure and function in a three-dimensional context to promote epithelial morphogenesis and function in the mammary gland.
Date:
October 1, 2009
Creator:
Spencer, Virginia A; Xu, Ren & Bissell, Mina
Object Type:
Article
System:
The UNT Digital Library
Generation of simple, type-safe messages for inter-task communications
We present a development tool that generates source code to marshal and unmarshal messages. The code generator creates modules for differing processor architectures and programming languages.
Date:
October 1, 2009
Creator:
Neswold, R. & King, C.
Object Type:
Article
System:
The UNT Digital Library
A generic finite state machine framework for the ACNET control system
A significant level of automation and flexibility has been added to the ACNET control system through the development of a Java-based Finite State Machine (FSM) infrastructure. These FSMs are integrated into ACNET and allow users to easily build, test and execute scripts that have full access to ACNET's functionality. In this paper, a description will be given of the FSM design and its ties to the Java-based Data Acquisition Engine (DAE) framework. Each FSM is part of a client-server model with FSM display clients using Remote Method Invocation (RMI) to communicate with DAE servers heavily coupled to ACNET. A web-based monitoring system that allows users to utilize browsers to observe persistent FSMs will also be discussed. Finally, some key implementations such as the crash recovery FSM developed for the Electron Cooling machine protection system will be presented.
Date:
October 1, 2009
Creator:
Carmichael, L. & Warner, A.
Object Type:
Article
System:
The UNT Digital Library
The Genome of the Western Clawed Frog Xenopus tropicalis
The western clawed frog Xenopus tropicalis is an important model for vertebrate development that combines experimental advantages of the African clawed frog Xenopus laevis with more tractable genetics. Here we present a draft genome sequence assembly of X. tropicalis. This genome encodes over 20,000 protein-coding genes, including orthologs of at least 1,700 human disease genes. Over a million expressed sequence tags validated the annotation. More than one-third of the genome consists of transposable elements, with unusually prevalent DNA transposons. Like other tetrapods, the genome contains gene deserts enriched for conserved non-coding elements. The genome exhibits remarkable shared synteny with human and chicken over major parts of large chromosomes, broken by lineage-specific chromosome fusions and fissions, mainly in the mammalian lineage.
Date:
October 1, 2009
Creator:
Hellsten, Uffe; Harland, Richard M.; Gilchrist, Michael J.; Hendrix, David; Jurka, Jerzy; Kapitonov, Vladimir et al.
Object Type:
Article
System:
The UNT Digital Library
Graph algorithms in the titan toolkit.
Graph algorithms are a key component in a wide variety of intelligence analysis activities. The Graph-Based Informatics for Non-Proliferation and Counter-Terrorism project addresses the critical need of making these graph algorithms accessible to Sandia analysts in a manner that is both intuitive and effective. Specifically we describe the design and implementation of an open source toolkit for doing graph analysis, informatics, and visualization that provides Sandia with novel analysis capability for non-proliferation and counter-terrorism.
Date:
October 1, 2009
Creator:
McLendon, William Clarence, III & Wylie, Brian Neil
Object Type:
Report
System:
The UNT Digital Library
Greensburg, Kansas: A Better, Greener Place to Live (Revised) (Brochure)
This Brochure is for Greensburg city leadership (Chamber of Commerce, Mayor's Office, and others) to use to attract visitors and businesses to Greensburg, and to ensure the city?s commitment to sustainability. Content includes EERE subject matter and mentions DOE's role in rebuilding. The layout is designed to be used as a template for other cities in similar situations.
Date:
October 1, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library