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Effective and efficient optics inspection approach using machine learning algorithms
The Final Optics Damage Inspection (FODI) system automatically acquires and utilizes the Optics Inspection (OI) system to analyze images of the final optics at the National Ignition Facility (NIF). During each inspection cycle up to 1000 images acquired by FODI are examined by OI to identify and track damage sites on the optics. The process of tracking growing damage sites on the surface of an optic can be made more effective by identifying and removing signals associated with debris or reflections. The manual process to filter these false sites is daunting and time consuming. In this paper we discuss the use of machine learning tools and data mining techniques to help with this task. We describe the process to prepare a data set that can be used for training and identifying hardware reflections in the image data. In order to collect training data, the images are first automatically acquired and analyzed with existing software and then relevant features such as spatial, physical and luminosity measures are extracted for each site. A subset of these sites is 'truthed' or manually assigned a class to create training data. A supervised classification algorithm is used to test if the features can predict the …
Date:
November 2, 2010
Creator:
Abdulla, G.; Kegelmeyer, L.; Liao, Z. & Carr, W.
Object Type:
Article
System:
The UNT Digital Library
Eastern Statesman (Wilburton, Okla.), Vol. 89, No. 7, Ed. 1 Thursday, December 2, 2010
Bimonthly student newspaper from Eastern Oklahoma State College in Wilburton, Oklahoma that includes local, state, and campus news along with advertising.
Date:
December 2, 2010
Creator:
Akins, Chandra
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Analysis of 14C and 13C in Teeth Provides Precise Birth Dating and Clues to Geographical Origin
None
Date:
August 2, 2010
Creator:
Alkass, K.; Buchholz, B. A.; Druid, H. & Spalding, K. L.
Object Type:
Article
System:
The UNT Digital Library
Separation of High Order Harmonics with Fluoride Windows
The lower orders produced in high order harmonic generation can be effciently temporally separated into monochromatic pulses by propagation in a Fluoride window while still preserving their femtosecond pulse duration. We present calculations for MgF2, CaF2, and LiF windows for the third, fifth, and seventh harmonics of 800 nm. We demonstrate the use of this simple and inexpensive technique in a femtosecond pump/probe experiment using the fifth harmonic.
Date:
August 2, 2010
Creator:
Allison, Tom; van Tilborg, Jeroen; Wright, Travis; Hertlein, Marcus; Falcone, Roger & Belkacem, Ali
Object Type:
Article
System:
The UNT Digital Library
STM imaging of electronic waves on the surface of Bi2Te3: topologically protected surface states and hexagonal warping effects
Scanning tunneling spectroscopy studies on high-quality Bi{sub 2}Te{sub 3} crystals exhibit perfect correspondence to ARPES data, hence enabling identification of different regimes measured in the local density of states (LDOS). Oscillations of LDOS near a step are analyzed. Within the main part of the surface band oscillations are strongly damped, supporting the hypothesis of topological protec- tion. At higher energies, as the surface band becomes concave, oscillations appear which disperse with a particular wave-vector that may result from an unconventional hexagonal warping term.
Date:
June 2, 2010
Creator:
Alpichshev, Zhanybek; /SIMES, Stanford /SLAC /Stanford U., Phys. Dept.; Analytis, J. G.; /SIMES, Stanford /SLAC /Stanford U., Phys. Dept.; Chu, J. H.; Fisher, I. R. et al.
Object Type:
Article
System:
The UNT Digital Library
Radiography Facility - Building 239 Independent Validation Review
The purpose of this task was to perform an Independent Validation Review to evaluate the successful implementation and effectiveness of Safety Basis controls, including new and revised controls, to support the implementation of a new DSA/TSR for B239. This task addresses Milestone 2 of FY10 PEP 7.6.6. As the first IVR ever conducted on a LLNL nuclear facility, it was designated a pilot project. The review follows the outline developed for Milestone 1 of the PEP, which is based on the DOE Draft Guide for Performance of Independent Verification Review of Safety Basis Controls. A formal Safety Basis procedure will be developed later, based on the lessons learned with this pilot project. Note, this review is termed a ''Validation'' in order to be consistent with the PEP definition and address issues historically raised about verification mechanisms at LLNL. Validation is intended to confirm that implementing mechanisms realistically establish the ability of TSR LCO, administrative control or safety management program to accomplish its intended safety function and that the controls are being implemented. This effort should not, however, be confused with a compliance assessment against all relevant DOE requirements and national standards. Nor is it used as a vehicle to question …
Date:
February 2, 2010
Creator:
Altenbach, T J; Beaulieu, R A; Watson, J F & Wong, H J
Object Type:
Report
System:
The UNT Digital Library
ARPES studies of the electronic structure of LaOFe(P,As)
We report a comparison study of LaOFeP and LaOFeAs, two parent compounds of recently discovered iron-pnictide superconductors, using angle-resolved photoemission spectroscopy. Both systems exhibit some common features that are very different from well-studied cuprates. In addition, important differences have also been observed between these two ferrooxypnictides. For LaOFeP, quantitative agreement can be found between our photoemission data and the LDA band structure calculations, suggesting that a weak coupling approach based on an itinerant ground state may be more appropriate for understanding this new superconducting compound. In contrast, the agreement between LDA calculations and experiments in LaOFeAs is relatively poor, as highlighted by the unexpected Fermi surface topology around ({pi},{pi}). Further investigations are required for a comprehensive understanding of the electronic structure of LaOFeAs and related compounds.
Date:
June 2, 2010
Creator:
Analytis, J.G.
Object Type:
Article
System:
The UNT Digital Library
International Criminal Court Cases in Africa: Status and Policy Issues
This report provides background on current International Criminal Court (ICC) cases and examines issues raised by the ICC's actions in Africa, including the potential deterrence of future abuses and the potential impact on African peace processes.
Date:
April 2, 2010
Creator:
Arieff, Alexis; Margesson, Rhoda & Browne, Marjorie Ann
Object Type:
Report
System:
The UNT Digital Library
Search for the B to K nu nu-bar Decay Using Semi-Leptonic Tags
We present an update of the search for the flavor-changing neutral current B{sup +} {yields} K{sup +}{nu}{bar {nu}} decay using 351 X 10{sup 6} B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B factory. Due to the presence of two neutrinos in the final state, we require the reconstruction of the companion B in the event through the decay channel B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}X. We find 38 candidates in the data with an expected background of 31{-+} 12. This allows us to set an upper limit on the branching fraction for B{sup +} {yields} K{sup +}{nu}{bar {nu}} of 4.5 X 10{sup -5} at 90% confidence level.
Date:
June 2, 2010
Creator:
Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X. et al.
Object Type:
Article
System:
The UNT Digital Library
A Design Report of the Baseline for PEP-X: an Ultra-Low Emittance Storage Ring
Over the past year, we have worked out a baseline design for PEP-X, as an ultra-low emittance storage ring that could reside in the existing 2.2-km PEPII tunnel. The design features a hybrid lattice with double bend achromat (DBA) cells in two arcs and theoretical minimum emittance (TME) cells in the remaining four arcs. Damping wigglers are used to reduce the horizontal emittance to 86 pm-rad at zero current for a 4.5 GeV electron beam. At a design current of 1.5 A, the horizontal emittance increases, due to intrabeam scattering, to 164 pm-rad when the vertical emittance is maintained at a diffraction limited 8 pm-rad. The baseline design will produce photon beams achieving a brightness of 10{sup 22} (ph/s/mm{sup 2}/mrad{sup 2}/0.1% BW) at 10 keV in a 3.5-m conventional planar undulator. Our study shows that an optimized lattice has adequate dynamic aperture, while accommodating a conventional off-axis injection system. In this report, we present the results of study, including the lattice properties, nonlinear dynamics, intra-beam scattering and Touschek lifetime, RF system, and collective instabilities. Finally, we discuss the possibility of partial lasing at soft X-ray wavelengths using a long undulator in a straight section.
Date:
June 2, 2010
Creator:
Bane, Karl; Bertsche, Kirk; Cai, Yunhai; Chao, Alex; Corbett, Willian; Fox, John et al.
Object Type:
Report
System:
The UNT Digital Library
Traditional narrative about a lazy husband
This is a folktale about the lazy husband. Dialect: Standard Boro
Date:
March 2, 2010
Creator:
Basumatary, Prafulla
Object Type:
Sound
System:
The UNT Digital Library
Traditional narrative about the boatman
This is a folktale about the boatman. Dialect: Standard Boro
Date:
March 2, 2010
Creator:
Basumatary, Prafulla
Object Type:
Sound
System:
The UNT Digital Library
Traditional narrative about the fortune teller
This is a folktale about a fortune teller. Dialect: Standard Boro
Date:
March 2, 2010
Creator:
Basumatary, Prafulla
Object Type:
Sound
System:
The UNT Digital Library
Traditional narrative about the widow sister
This is a folk tale about the widow sister. Dialect: Standard Boro
Date:
March 2, 2010
Creator:
Basumatary, Prafulla
Object Type:
Sound
System:
The UNT Digital Library
Government Access to Phone Calling Activity and Related Records: Legal Authorities
This report summarizes legal authorities regarding access by the government, for either foreign intelligence or law enforcement purposes, to information related to telephone calling patterns or practices. Where pertinent, it also discusses statutory prohibitions against accessing or disclosing such information, along with relevant exceptions to those prohibitions.
Date:
February 2, 2010
Creator:
Bazan, Elizabeth B.; Liu, Edward C. & Stevens, Gina
Object Type:
Report
System:
The UNT Digital Library
The Cost of Iraq, Afghanistan, and Other Global War on Terror Operations Since 9/11
In the ninth year of operations since the 9/11 attacks while troops are being withdrawn in Iraq and increased in Afghanistan, the cost of war continues to be a major issue including the total amount appropriated, the amount for each operation, average monthly spending rates, and the scope and duration of future costs. This report analyzes war funding for the Defense Department and tracks funding for USAID and VA Medical funding.
Date:
September 2, 2010
Creator:
Belasco, Amy
Object Type:
Report
System:
The UNT Digital Library
Next-to-Leading Order QCD Predictions for Z, gamma^* 3-Jet Distributions at the Tevatron
Using BlackHat in conjunction with SHERPA, we have computed next-to-leading order QCD predictions for a variety of distributions in Z, {gamma}{sup {asterisk}}+ 1, 2, 3-jet production at the Tevatron, where the Z boson or off-shell photon decays into an electron-positron pair. We find good agreement between the NLO results for jet {sub pT} distributions and measurements by CDF and D0. We also present jetproduction ratios, or probabilities of finding one additional jet. As a function of vector-boson {sub pT} , the ratios have distinctive features which we describe in terms of a simple model capturing leading logarithms and phase-space and parton-distribution-function suppression.
Date:
June 2, 2010
Creator:
Berger, C.F.; /MIT, LNS; Bern, Z.; /UCLA; Dixon, L.J.; /SLAC et al.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Arthur Bertanzetti, February 2, 2010
The National Museum of the Pacific War presents an interview with Arthur Bertanzetti. Bertanzetti joined the Army in February of 1941. After 2 years he transferred to the Army Air Forces. He was commissioned in 1943. He flew B-24s and was assigned to the 489th Bomb Group, 846th Bomb Squadron. In 1944 Bertanzetti traveled to England and completed 31 combat missions. On the last mission his plane went down. He and the crew bailed out over Germany, were captured and taken as prisoners of war to Stalag Luft III. He was a POW for 10 months, then liberated by Patton???s 3rd Army. Serving later in the reserves, Bertanzetti was discharged from the service in October of 1967.
Date:
February 2, 2010
Creator:
Bertanzetti, Arthur
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Arthur Bertanzetti, February 2, 2010
The National Museum of the Pacific War presents an interview with Arthur Bertanzetti. Bertanzetti joined the Army in February of 1941. After 2 years he transferred to the Army Air Forces. He was commissioned in 1943. He flew B-24s and was assigned to the 489th Bomb Group, 846th Bomb Squadron. In 1944 Bertanzetti traveled to England and completed 31 combat missions. On the last mission his plane went down. He and the crew bailed out over Germany, were captured and taken as prisoners of war to Stalag Luft III. He was a POW for 10 months, then liberated by Patton???s 3rd Army. Serving later in the reserves, Bertanzetti was discharged from the service in October of 1967.
Date:
February 2, 2010
Creator:
Bertanzetti, Arthur
Object Type:
Text
System:
The Portal to Texas History
Bills and Resolutions: Examples of How Each Kind Is Used
When Congress seeks to pass a law, it uses a bill or joint resolution, which must be passed by both houses in identical form, then presented to the President for his approval or disapproval. This report briefly describes this process.
Date:
December 2, 2010
Creator:
Beth, Richard S.
Object Type:
Report
System:
The UNT Digital Library
Alloy Design and Thermomechanical Processing of a Beta Titanium Alloy for a Heavy Vehicle Application
With the strength of steel, but at half the weight, titanium has the potential to offer significant benefits in the weight reduction of heavy vehicle components while possibly improving performance. However, the cost of conventional titanium fabrication is a major barrier in implementation. New reduction technologies are now available that have the potential to create a paradigm shift in the way the United States uses titanium, and the economics associated with fabrication of titanium components. This CRADA project evaluated the potential to develop a heavy vehicle component from titanium powders. The project included alloy design, development of manufacturing practices, and modeling the economics associated with the new component. New Beta alloys were designed for this project to provide the required mechanical specifications while utilizing the benefits of the new fabrication approach. Manufacturing procedures were developed specific to the heavy vehicle component. Ageing and thermal treatment optimization was performed to provide the desired microstructures. The CRADA partner established fabrication practices and targeted capital investment required for fabricating the component out of titanium. Though initial results were promising, the full project was not executed due to termination of the effort by the CRADA partner and economic trends observed in the heavy vehicle …
Date:
July 2, 2010
Creator:
Blue, Craig A. & Peter, William H.
Object Type:
Report
System:
The UNT Digital Library
Doctoral Recital: 2010-12-02 - Kurt Bonnett, trumpet
Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
December 2, 2010
Creator:
Bonnett, Kurt
Object Type:
Sound
System:
The UNT Digital Library
Doctoral Recital: 2010-04-02 - Michael Bonney, piano
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
April 2, 2010
Creator:
Bonney, Michael
Object Type:
Sound
System:
The UNT Digital Library
VERTICAL PILLAR ARRAYS FOR PLASMON NANOCAVITIES
We investigate tunable plasmon resonant cavity arrays in paired parallel nanowire waveguides. Resonances are observed when the waveguide length is an odd multiple of quarter plasmon wavelengths, consistent with boundary conditions of node and antinode at the ends. Two nanowire waveguides satisfy the dispersion relation of a planar metal-dielectric-metal waveguide of equivalent width equal to the square field average weighted gap. Confinement factors over 10{sup 3} are possible due to plasmon focusing in the inter-wire space.
Date:
April 2, 2010
Creator:
Bora, M.; Fasenfest, B. J.; Behymer, E. M.; Chang, A. S.; Hguyen, H. T.; Britten, J. A. et al.
Object Type:
Article
System:
The UNT Digital Library