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Alignment validation
The four experiments, ALICE, ATLAS, CMS and LHCb are currently under constructionat CERN. They will study the products of proton-proton collisions at the Large Hadron Collider. All experiments are equipped with sophisticated tracking systems, unprecedented in size and complexity. Full exploitation of both the inner detector andthe muon system requires an accurate alignment of all detector elements. Alignmentinformation is deduced from dedicated hardware alignment systems and the reconstruction of charged particles. However, the system is degenerate which means the data is insufficient to constrain all alignment degrees of freedom, so the techniques are prone to converging on wrong geometries. This deficiency necessitates validation and monitoring of the alignment. An exhaustive discussion of means to validate is subject to this document, including examples and plans from all four LHC experiments, as well as other high energy experiments.
Date:
September 6, 2008
Creator:
ALICE; ATLAS; CMS; LHCb & Golling, Tobias
Object Type:
Article
System:
The UNT Digital Library
Fluxnet Synthesis Dataset Collaboration Infrastructure
The Fluxnet synthesis dataset originally compiled for the La Thuile workshop contained approximately 600 site years. Since the workshop, several additional site years have been added and the dataset now contains over 920 site years from over 240 sites. A data refresh update is expected to increase those numbers in the next few months. The ancillary data describing the sites continues to evolve as well. There are on the order of 120 site contacts and 60proposals have been approved to use thedata. These proposals involve around 120 researchers. The size and complexity of the dataset and collaboration has led to a new approach to providing access to the data and collaboration support and the support team attended the workshop and worked closely with the attendees and the Fluxnet project office to define the requirements for the support infrastructure. As a result of this effort, a new website (http://www.fluxdata.org) has been created to provide access to the Fluxnet synthesis dataset. This new web site is based on a scientific data server which enables browsing of the data on-line, data download, and version tracking. We leverage database and data analysis tools such as OLAP data cubes and web reports to enable browser …
Date:
February 6, 2008
Creator:
Agarwal, Deborah A.; Humphrey, Marty; van Ingen, Catharine; Beekwilder, Norm; Goode, Monte; Jackson, Keith et al.
Object Type:
Report
System:
The UNT Digital Library
Observation of Polarized Positrons from an Undulator-Based Source
An experiment (E166) at the Stanford Linear Accelerator Center (SLAC) has demonstrated a scheme in which a multi-GeV electron beam passed through a helical undulator to generate multi-MeV, circularly polarized photons which were then converted in a thin target to produce positrons (and electrons) with longitudinal polarization above 80% at 6 MeV. The results are in agreement with Geant4 simulations that include the dominant polarization-dependent interactions of electrons, positrons and photons in matter.
Date:
March 6, 2008
Creator:
Alexander, G; Barley, J.; Batygin, Y.; Berridge, S.; Bharadwaj, V.; Bower, G. et al.
Object Type:
Article
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 26, No. 10, Ed. 1 Thursday, March 6, 2008
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
March 6, 2008
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 26, No. 45, Ed. 1 Thursday, November 6, 2008
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
November 6, 2008
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Renewal aging and linear response
Paper discussing the linear response to an external perturbation of a renewal process, in an aging condition that, with no perturbation, would yield super-diffusion.
Date:
February 6, 2008
Creator:
Allegrini, Paolo; Ascolani, Gianluca; Bologna, Mauro & Grigolini, Paolo
Object Type:
Paper
System:
The UNT Digital Library
Top Jets at the LHC
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" methodbased on jet mass measurement is considered in detail. To analyze the feasibility ofthe top-tagging method, both theoretical and experimental aspects of the large QCDjet background contribution are examined. Based on a factorization approach, wederive a simple analytic approximation for the shape of the QCD jet mass spectrum.We observe very good agreement with the Monte Carlo simulation. We consider high pT tt bar production in the Standard Model as an example, and show that our theoretical QCD jet mass distributions can efficiently characterize the background via sideband analyses. We show that with 25 fb-1 of data, our approach allows us to resolve top-jets with pT _> 1 TeV, from the QCD background, and about 1.5 TeV top-jets with 100 fb-1, without relying on b-tagging. To further improve the significancewe consider jet shapes …
Date:
October 6, 2008
Creator:
Almeida, L.G.; Lee, S.J.; Perez, G.; Sung, I. & Virzi, J.
Object Type:
Article
System:
The UNT Digital Library
Guide to Individuals Seated on the Senate Dais
This report is one of a series on the legislative process. It contains a guide to individuals seated on the Senate Dais.
Date:
May 6, 2008
Creator:
Amer, Mildred
Object Type:
Report
System:
The UNT Digital Library
The Debt Limit: History and Recent Increases
This report contains the history and increases of the debt limit for the second time in 2008.
Date:
October 6, 2008
Creator:
Austin, D. Andrew & Levit, Mindy R.
Object Type:
Report
System:
The UNT Digital Library
Elliptic integral evaluations of Bessel moments
We record what is known about the closed forms for variousBessel function moments arising in quantum field theory, condensed mattertheory and other parts of mathematical physics. More generally, wedevelop formulae for integrals of products of six or fewer Besselfunctions. In consequence, we are able to discover and prove closed formsfor c(n,k) := Int_0 inf tk K_0 n(t) dt, with integers n = 1, 2, 3, 4 andk greater than or equal to 0, obtaining new results for the even momentsc3,2k and c4,2k . We also derive new closed forms for the odd momentss(n,2k+1) := Int_0 inf t(2k+1) I_0(t) K_0n(t) dt,with n = 3, 4 and fort(n,2k+1) := Int_0 inf t(2k+1) I_02(t) K_0(n-2) dt, with n = 5, relatingthe latter to Green functions on hexagonal, diamond and cubic lattices.We conjecture the values of s(5,2k+1), make substantial progress on theevaluation of c(5,2k+1), s(6,2k+1) and t(6,2k+1) and report more limitedprogress regarding c(5,2k), c(6,2k+1) and c(6,2k). In the process, weobtain 8 conjectural evaluations, each of which has been checked to 1200decimal places. One of these lies deep in 4-dimensional quantum fieldtheory and two are probably provable by delicate combinatorics. Thereremains a hard core of five conjectures whose proofs would be mostinstructive, to mathematicians and …
Date:
January 6, 2008
Creator:
Bailey, David H.; Borwein, Jonathan M.; Broadhurst, David & Glasser, M. L.
Object Type:
Article
System:
The UNT Digital Library
Independent Confirmatory Survey Summary and Results for the Plum Brook Reactor Facility Sandusky OH
The objectives of the confirmatory survey activities were to provide independent contractor field data reviews and to generate independent radiological data for use by the Nuclear Regulatory Commission (NRC) in evaluating the adequacy and accuracy of the licensee’s procedures and final status survey (FSS) results.
Date:
May 6, 2008
Creator:
Bailey, E.N.
Object Type:
Report
System:
The UNT Digital Library
Faculty Recital: 2008-10-06 - Tony Baker, alto and tenor trombones and Steven Harlos, piano
Access:
Use of this item is restricted to the UNT Community
Recital performed at the UNT College of Music Concert Hall.
Date:
October 6, 2008
Creator:
Baker, Tony (Trombonist) & Harlos, Steven, 1953-
Object Type:
Sound
System:
The UNT Digital Library
The Strategic Petroleum Reserve: History, Perspectives, and Issues
This report offers a brief history of the Strategic Petroleum Reserve (SPR) in the Energy Policy and Conservation Act. It discusses the establishment of a regional home heating oil reserve and addresses the question when the SPR should be used.
Date:
June 6, 2008
Creator:
Bamberger, Robert
Object Type:
Report
System:
The UNT Digital Library
The Strategic Petroleum Reserve: History, Perspectives, and Issues
This report discusses the Strategic Petroleum Reserve (SPR) in the Energy Policy and Conservation Act (EPCA, P.L. 94-163), which is intended to help prevent a repetition of the economic dislocation caused by the 1973-1974 Arab oil embargo.
Date:
June 6, 2008
Creator:
Bamberger, Robert
Object Type:
Report
System:
The UNT Digital Library
Feasibility Evaluation and Retrofit Plan for Cold Crucible Induction Melter Deployment in the Defense Waste Processing Facility at Savannah River Site 8118
Cold crucible induction melters (CCIM) have been proposed as an alternative technology for waste glass melting at the Defense Waste Processing Facility (DWPF) at Savannah River Site (SRS) as well as for other waste vitrification facilities. Proponents of this technology cite high temperature operation, high tolerance for noble metals and aluminum, high waste loading, high throughput capacity, and low equipment cost as the advantages over existing Joule Heated Melter (JHM) technology. The CCIM uses induction heating to maintain molten glass at high temperature. A water-cooled helical induction coil is connected to an AC current supply, typically operating at frequencies from 100 KHz to 5 MHz. The oscillating magnetic field generated by the oscillating current flow through the coil induces eddy currents in conductive materials within the coil. Those oscillating eddy currents, in turn, generate heat in the material. In the CCIM, the induction coil surrounds a 'Cold Crucible' which is formed by metal tubes, typically copper or stainless steel. The tubes are constructed such that the magnetic field does not couple with the crucible. Therefore, the field generated by the induction coil couples primarily with the conductive medium (hot glass) within. The crucible tubes are water cooled to maintain their …
Date:
February 6, 2008
Creator:
Barnes, Allan B.; Iverson, Daniel C.; Adkins, Brannen J. & Tchemitcheff, Eric
Object Type:
Article
System:
The UNT Digital Library
High Throughput, Continuous, Mass Production of Photovoltaic Modules
AVA Solar has developed a very low cost solar photovoltaic (PV) manufacturing process and has demonstrated the significant economic and commercial potential of this technology. This I & I Category 3 project provided significant assistance toward accomplishing these milestones. The original goals of this project were to design, construct and test a production prototype system, fabricate PV modules and test the module performance. The original module manufacturing costs in the proposal were estimated at $2/Watt. The objectives of this project have been exceeded. An advanced processing line was designed, fabricated and installed. Using this automated, high throughput system, high efficiency devices and fully encapsulated modules were manufactured. AVA Solar has obtained 2 rounds of private equity funding, expand to 50 people and initiated the development of a large scale factory for 100+ megawatts of annual production. Modules will be manufactured at an industry leading cost which will enable AVA Solar's modules to produce power that is cost-competitive with traditional energy resources. With low manufacturing costs and the ability to scale manufacturing, AVA Solar has been contacted by some of the largest customers in the PV industry to negotiate long-term supply contracts. The current market for PV has continued to grow …
Date:
February 6, 2008
Creator:
Barth, Kurt
Object Type:
Report
System:
The UNT Digital Library
Sub-Scale Prototype Spent Nuclear Fuel/High Level Waste (SNF/HLW) Containers - B559010 REV 02
None
Date:
March 6, 2008
Creator:
Beardsley, M
Object Type:
Report
System:
The UNT Digital Library
The Animal Welfare Act: Background and Selected Legislation
This report describes the Background and Selected Legislation of The Animal Welfare Act which was first passed in 1966.
Date:
August 6, 2008
Creator:
Becker, Geoffrey S.
Object Type:
Report
System:
The UNT Digital Library
The 2008 Farm Bill: Major Provisions and Legislative Action
This report provides a summary of 2008 farm bill implementation, discusses provisions, and includes a farm bill debate timeline.
Date:
November 6, 2008
Creator:
Becker, Geoffrey S.; Capehart, Tom; Chite, Ralph M.; Cowan, Tadlock; Gorte, Ross W.; Hanrahan, Charles E. et al.
Object Type:
Report
System:
The UNT Digital Library
Energy and Water Development: FY2009 Appropriations
None
Date:
October 6, 2008
Creator:
Behrens, Carl E.; Andrews, Anthony; Bearden, David M.; Carter, Nicole T.; Holt, Mark; Lane, Nic et al.
Object Type:
Report
System:
The UNT Digital Library
Collaboration in Practice: Megadata Happens
This presentation discusses The Portal to Texas History and how collaborations with other organizations has helped add to the collection. In this presentation, the author illustrates examples from The Portal to Texas History with information about metadata management, quality issues, and the automated systems in place by the University of North Texas (UNT) Libraries' Digital Projects Unit.
Date:
June 6, 2008
Creator:
Belden, Dreanna
Object Type:
Presentation
System:
The UNT Digital Library
Increases in Tricare Costs: Background and Options for Congress
In its FY2007 budget submission, the Department of Defense (DOD) proposed increases in Tricare enrollment fees, deductibles, and pharmacy co-payments for retired beneficiaries not yet eligible for Medicare. The raises were justified by DOD as necessary to constrain the growth of health care spending as a proportion of the overall defense budget in the next decade. Many beneficiaries argued that the proposed hikes were unfair and unnecessary. The FY2007 Defense Authorization Act prohibited increases in premiums, deductibles, and co-payments prior to September 30, 2007. The FY2008 National Defense Authoriztion Act extended the prohibition of increases in co-payments and enrollment fees until October 2008 and Congress may move to extend them further.
Date:
May 6, 2008
Creator:
Best, Richard A., Jr.
Object Type:
Report
System:
The UNT Digital Library
Renewal Aging as Emerging Property of Phase Synchronization
Paper discussing renewal aging as emerging property of phase synchronization.
Date:
February 6, 2008
Creator:
Bianco, Simone; Geneston, Elvis L.; Grigolini, Paolo & Ignaccolo, Massimiliano
Object Type:
Paper
System:
The UNT Digital Library
Oral History Interview with Henry Bicknell, June 6, 2008
The National Museum of the Pacific War presents an interview with Henry Bicknell. Bicknell was drafted by the Army in December of 1942. He served with the 5th Armored Division and was sent to Europe where he drove an ammunition truck for the tanks. He provides details of his training and describes the light tanks they used. In February of 1944 they traveled to England and were attached to Patton’s 3rd Army. They landed on Utah Beach in July of 1944, and traveled through France and the southern part of Belgium, where he participated in the liberation of Luxemburg. Bicknell provides details of his experiences, including running from his ammunition truck when it was struck by a shell and enduring numerous attacks and casualties of fellow servicemen. Bicknell served 3 years with the 5th Armored Division. Bicknell was discharged in October of 1945.
Date:
June 6, 2008
Creator:
Bicknell, Henry
Object Type:
Sound
System:
The Portal to Texas History