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A 10-Hz Terawatt Class Ti:Sapphire Laser System: Development and Applications
We developed a two stage Ti:Sapphire laser system to generate 16 mJ/80fs laser pulses at the pulse repetition rate of 10 Hz. The key deriver for the present design is implementing a highly efficient symmetric confocal pre-amplifier and employing a simple, inexpensive synchronization scheme relying only on a commercial digital delay-generator. We characterized the amplified pulses in spatial-, spectral-, and temporal-domains. The laser system was used to investigate various nonlinear optical processes, and to modify the optical properties of metal- and semiconductor-surfaces. We are currently building a third amplifier to boost the laser power to the multi-terawatt range.
Date:
January 12, 2010
Creator:
Sharma, A. K.; Smedley, J.; Tsang, T. & Rao, T.
Object Type:
Article
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 112, No. 26, Ed. 1 Tuesday, January 12, 2010
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 12, 2010
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Atmospheric Radiation Measurement Program Climate Research Facility Operations Quarterly Report. October 1 - December 31, 2009.
Individual raw data streams from instrumentation at the Atmospheric Radiation Measurement (ARM) Program Climate Research Facility (ACRF) fixed and mobile sites are collected and sent to the Data Management Facility (DMF) at Pacific Northwest National Laboratory (PNNL) for processing in near real-time. Raw and processed data are then sent approximately daily to the ACRF Archive, where they are made available to users. For each instrument, we calculate the ratio of the actual number of data records received daily at the Archive to the expected number of data records. The results are tabulated by (1) individual data stream, site, and month for the current year and (2) site and fiscal year (FY) dating back to 1998. The U.S. Department of Energy (DOE) requires national user facilities to report time-based operating data. The requirements concern the actual hours of operation (ACTUAL); the estimated maximum operation or uptime goal (OPSMAX), which accounts for planned downtime; and the VARIANCE [1 - (ACTUAL/OPSMAX)], which accounts for unplanned downtime. The OPSMAX time for the first quarter of FY 2010 for the North Slope Alaska (NSA) locale is 1,987.20 hours (0.90 x 2,208); for the Southern Great Plains (SGP) site is 2,097.60 hours (0.95 x 2,208); and …
Date:
January 12, 2010
Creator:
Sisterson, D. L.
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 90, No. 8, Ed. 1 Tuesday, January 12, 2010
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
January 12, 2010
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 104, No. 4, Ed. 1 Tuesday, January 12, 2010
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
January 12, 2010
Creator:
Cartwright, Brian & Velvin, Candace E.
Object Type:
Newspaper
System:
The Portal to Texas History
Broadband Internet Access and the Digital Divide: Federal Assistance Programs
This report provides information about the Broadband Internet Access and the Digital Divide through Federal Assistance Programs.
Date:
January 12, 2010
Creator:
Kruger, Lennard G. & Gilroy, Angele A.
Object Type:
Report
System:
The UNT Digital Library
Budget Enforcement Procedures: Senate Pay- As-You-Go (PAYGO) Rule
This report discusses the Senate pay-as-you-go, or PAYGO, rule which generally requires that any legislation projected to increase direct spending or reduce revenues must also include equivalent amounts of direct spending cuts, revenue increases, or a combination of the two, so that the legislation does not increase the on-budget deficit over a six-year period and an 11-year period.
Date:
January 12, 2010
Creator:
Heniff, Bill, Jr.
Object Type:
Report
System:
The UNT Digital Library
CRS Issue Statement on Elementary and Secondary Education
This report discusses about the primary issue of concern to the congress in elementary and secondary education. It further discusses about federal government strategies to support the education of elementary and secondary students in the United States.
Date:
January 12, 2010
Creator:
Skinner, Rebecca R.
Object Type:
Report
System:
The UNT Digital Library
CRS Issue Statement on Health Care for Military Personnel and Veterans
This report discusses current military operations in Iraq and Afghanistan that has present a number of policy challenges for the second session of the 111th congress.
Date:
January 12, 2010
Creator:
Jansen, Don J.
Object Type:
Report
System:
The UNT Digital Library
Cybersecurity: Current Legislation, Executive Branch Initiatives, and Options for Congress
This report identifies cybersecurity policy issues that have been proposed for priority consideration. The report lists and synopsizes current legislation that has been developed to address various aspects of the cybersecurity problem. It then lists the current status of the legislation and compares legislation with existing executive branch initiatives. Finally, analysis of information contained in executive branch initiatives and congressional legislation is used to further highlight related considerations for Congress.
Date:
January 12, 2010
Creator:
Theohary, Catherine A. & Rollins, John
Object Type:
Report
System:
The UNT Digital Library
Embedded Sensor Technology Evaluation
Fiber Sensors are poised to be used in future LEPs. The three primary vehicles for fiber sensors are Department 1, Joint Test Assembly (JTA), and Shelf Life (SL). The National Security Enterprise (NSE) community plans to incorporate optical sensors or systems into these vehicles. Additionally, hermetic sealing of optical systems is required if optical technology is to be integrated into LEP and future weapons applications. Hermetic seals will reduce the long-term risk of contamination which can degrade or incapacitate optical components. This study was funded through the Kansas City Plant's (KCP) ESC work package between 2007 and 2009 to develop optical sensors, identify commercial fiber sensors and hermetic connectors, and qualify these sensors against likely weapon lifetime environments.
Date:
January 12, 2010
Creator:
Kennedy, Chris
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Ultrasonic Measurement Variation in the Double-Shell Tank Integrity Project
Washington River Protection Solutions (WRPS) under contract from the U.S. Department of Energy (DOE) is responsible for assessing the condition of the double-shell tanks (DST) on the Hanford nuclear site. WRPS has contracted with AREVA Federal Services LLC (AFS) to perform ultrasonic testing (UT) inspections of the 28 DSTs to assess the condition of the tanks, judge the effects of past corrosion control practices, and satisfy a regulatory requirement to periodically assess the integrity of the tanks. Since measurement inception in 1997, nine waste tanks have been examined twice (at the time of this report) providing UT data that can now be compared over specific areas. During initial reviews of these two comparable data sets, average UT wall-thickness measurement reductions were noted in most of the tanks. This variation could be a result of actual wall thinning occurring on the waste-tanks walls, or some other unexplained anomaly resulting from measurement error due to causes such as the then-current measurement procedures, operator setup, or equipment differences. WRPS contracted with the Pacific Northwest National Laboratory (PNNL) to assist in understanding why this variation exists and where it stems from.
Date:
January 12, 2010
Creator:
Pardini, Allan F.; Weier, Dennis R.; Crawford, Susan L. & Munley, John T.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, January 12, 2010
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 12, 2010
Creator:
Pittman, Jerry & Wray, Kelly
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Farm and Food Support Under USDA’s Section 32 Program
This report provides information about the Farm and Food Support Under USDA’s Section 32 Program which is funded by a permanent appropriation of 30% of previous year' s custom receipt, less custom transfers.
Date:
January 12, 2010
Creator:
Becker, Geoffrey S. & Ho, Melissa D.
Object Type:
Report
System:
The UNT Digital Library
Federal Law on Parking Privileges for Persons with Disabilities
This report describes the federal role in parking privileges law, outlines the uniform system's model rules, and briefly discusses state responses to the model federal rules.
Date:
January 12, 2010
Creator:
Toland, Carol J.
Object Type:
Report
System:
The UNT Digital Library
Federal Register, Volume 75, Number 7, January 12, 2010, Pages 1525-1696
Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii.
Date:
January 12, 2010
Creator:
United States. Office of the Federal Register.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Federal Research and Development Funding: FY2010
This report summarizes the FY2010 budget request for research & development (R&D) funding, including comparisons to R&D funding requests in the FY2009 budget. This report breaks down in detail the various aspects of the President's FY2010 R&D funding request.
Date:
January 12, 2010
Creator:
Sargent, John F., Jr.
Object Type:
Report
System:
The UNT Digital Library
The Greensheet (Houston, Tex.), Vol. 40, No. 589, Ed. 1 Tuesday, January 12, 2010
Free weekly newspaper that includes business and classified advertising.
Date:
January 12, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 590, Ed. 1 Tuesday, January 12, 2010
Free weekly newspaper that includes business and classified advertising.
Date:
January 12, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
High-Order Weno Simulations of Three-Dimensional Reshocked Richtmyer-Meshkov Instability to Late Times: Dynamics, Dependence on Initial Conditions, and Comparisons to Experimental Data
The dynamics of the reshocked multi-mode Richtmyer-Meshkov instability is investigated using 513 x 257{sup 2} three-dimensional ninth-order weighted essentially nonoscillatory shock-capturing simulations. A two-mode initial perturbation with superposed random noise is used to model the Mach 1.5 air/SF{sub 6} Vetter-Sturtevant shock tube experiment. The mass fraction and enstrophy isosurfaces, and density cross-sections are utilized to show the detailed flow structure before, during, and after reshock. It is shown that the mixing layer growth agrees well with the experimentally measured growth rate before and after reshock. The post-reshock growth rate is also in good agreement with the prediction of the Mikaelian model. A parametric study of the sensitivity of the layer growth to the choice of amplitudes of the short and long wavelength initial interfacial perturbation is also presented. Finally, the amplification effects of reshock are quantified using the evolution of the turbulent kinetic energy and turbulent enstrophy spectra, as well as the evolution of the baroclinic enstrophy production, buoyancy production, and shear production terms in the enstrophy and turbulent kinetic transport equations.
Date:
January 12, 2010
Creator:
Schilling, O & Latini, M
Object Type:
Article
System:
The UNT Digital Library
Immigration: Terrorist Grounds for Exclusion and Removal of Aliens
This report focuses on the terrorism-related grounds for inadmissibility and deportation/removal. It opens with an overview of the terror-related grounds as they evolved through recent years. The section on current law explains several legal definitions, and describes the terror-related grounds for inadmissibility and removal. The report then discusses the screening process to determine admissibility and to identify possible terrorists.
Date:
January 12, 2010
Creator:
Garcia, Michael J. & Wasem, Ruth Ellen
Object Type:
Report
System:
The UNT Digital Library
Korea-U.S. Relations: Issues for Congress
This report outlines the various elements of the bilateral relations between both the U.S. and North Korea and the U.S. and South Korea, especially nuclear nonproliferation agreements, nuclear dismantlement policies, and U.S. military troop withdrawals from South Korea.
Date:
January 12, 2010
Creator:
Niksch, Larry A.
Object Type:
Report
System:
The UNT Digital Library
Managing Coal Combustion Waste (CCW): Issues with Disposal and Use
None
Date:
January 12, 2010
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Measured Black Carbon Deposition on the Sierra Nevada Snow Pack and Implication for Snow Pack Retreat
Modeling studies show that the darkening of snow and ice by black carbon deposition is a major factor for the rapid disappearance of arctic sea ice, mountain glaciers and snow packs. This study provides one of the first direct measurements for the efficient removal of black carbon from the atmosphere by snow and its subsequent deposition to the snow packs of California. The early melting of the snow packs in the Sierras is one of the contributing factors to the severe water problems in California. BC concentrations in falling snow were measured at two mountain locations and in rain at a coastal site. All three stations reveal large BC concentrations in precipitation, ranging from 1.7 ng/g to 12.9 ng/g. The BC concentrations in the air after the snow fall were negligible suggesting an extremely efficient removal of BC by snow. The data suggest that below cloud scavenging, rather than ice nuclei, was the dominant source of BC in the snow. A five-year comparison of BC, dust, and total fine aerosol mass concentrations at multiple sites reveals that the measurements made at the sampling sites were representative of large scale deposition in the Sierra Nevada. The relative concentration of iron and …
Date:
January 12, 2010
Creator:
Hadley, Odelle L.; C.E., Corrigan; T. W., Kirchstetter; Cliff, S. S. & Ramanathan, V.
Object Type:
Article
System:
The UNT Digital Library