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Imaging the molecular dynamics of dissociative electron attachment to water

Description: Momentum imaging experiments on dissociative electron attachment to the water molecule are combined with ab initio theoretical calculations of the angular dependence of the quantum mechanical amplitude for electron attachment to provide a detailed picture of the molecular dynamics of dissociation attachment via the two lowest energy Feshbach resonances. The combination of momentum imaging experiments and theory can reveal dissociation dynamics for which the axial recoil approximation breaks dow… more
Date: October 19, 2009
Creator: Adaniya, Hidihito; Rudek, B.; Osipov, Timur; Haxton, Dan; Weber, Thorsten; Rescigno, Thomas N. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Trade and the Americas

Description: At the 1994 Summit of the Americas, 34 hemispheric democracies agreed to create a “Free Trade Area of the Americas” (FTAA) no later than 2005. If created, the FTAA would be a $13 trillion market of 34 countries (Cuba is not included) and nearly 800 million people. The population alone would make it the largest free trade area in the world with nearly twice the 450 million population of the now 25-nation European Union. In the nearly ten years following the 1994 summit, Western Hemisphere trade … more
Date: October 19, 2004
Creator: Ahearn, Raymond J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrogen-fueled polymer electrolyte fuel cell systems for transportation.

Description: The performance of a polymer electrolyte fuel cell (PEFC) system that is fueled directly by hydrogen has been evaluated for transportation vehicles. The performance was simulated using a systems analysis code and a vehicle analysis code. The results indicate that, at the design point for a 50-kW PEFC system, the system efficiency is above 50%. The efficiency improves at partial load and approaches 60% at 40% load, as the fuel cell operating point moves to lower current densities on the voltage-… more
Date: October 19, 1998
Creator: Ahluwalia, R.; Doss, E.D. & Kumar, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

RULLI/a Photon Counting Imager

Description: The Remote Low Light Imaging (RULLI) system responds to individual photons using a modification to conventional image intensifier technology and fast timing electronics. Each photon received at the detector is resolved in three dimensions (X, Y, and time). The accumulation of photons over time allows the system to image with very low light levels, such as starlight illumination. Using a low power pulsed laser and very fine time discrimination, three dimensional imaging has been accomplished wit… more
Date: October 19, 1998
Creator: Albright, K. L.; Smith, R. C.; Ho, C.; Wilson, S. K.; Bradley, J.; Bird, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

[Letter from George M. Aldrich to Wesley Pettinger, October 19,1991]*

Description: Letter from The Wesley Pettinger Engine Model Collection. Letter to Wesley Pettinger from George M. Aldrich, an enthusiast and manufacturer of model airplanes. He writes about the parts he has for several types of engines, including Forster and M&G (Remco) engine parts.
Date: October 19, 1991
Creator: Aldrich, George M.
Item Type: Refine your search to only Letter
Location: 29.555758 -98.362047
Partner: UNT Libraries Special Collections
open access

Preface

Description: Preface to Knowledge Discovery and Data Design Innovation: Proceedings of the International Conference on Knowledge Management (ICKM 2017), Dallas, Texas, USA, 25-26 October 2017.
Date: October 19, 2017
Creator: Alemneh, Daniel Gelaw; Allen, Jeff M. & Hawamdeh, Suliman M.
Item Type: Refine your search to only Book Chapter
Partner: UNT Libraries
open access

Cybersecurity Challenges in the Era of Open Access and BIG Data: Issues and Considerations

Description: Article from a panel held at the American Society for Information Science and Technology (ASIS&T) 2019 pre-conference held on October 19, 2019 in Melbourne, Australia. The panelists discussed cybersecurity challenges and provided an assessment of the cybersecurity issues related to open access and big data.
Date: October 19, 2019
Creator: Alemneh, Daniel Gelaw; Chang, Hsia-Ching; Hawamdeh, Suliman M.; Rorissa, Abebe & Assefa, Shimelis
Item Type: Refine your search to only Article
Partner: UNT Libraries
open access

Domain decomposition methods for parallel laser-tissue models with Monte Carlo transport

Description: Achieving parallelism in simulations that use Monte Carlo transport methods presents interesting challenges. For problems that require domain decomposition, load balance can be harder to achieve. The Monte Carlo transport package may have to operate with other packages that have different optimal domain decompositions for a given problem. To examine some of these issues, we have developed a code that simulates the interaction of a laser with biological tissue; it uses a Monte Carlo method to si… more
Date: October 19, 1998
Creator: Alme, H.J.; Rodrique, G. & Zimmerman, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Waste Package Corrosion Studies Using Small Mockup Experiments

Description: The corrosion of spent nuclear fuel and subsequent mobilization of radionuclides is of great concern in a geologic repository, particularly if conditions are oxidizing. Corroding A516 steel may offset these transport processes within the proposed waste packages at the Yucca Mountain Repository (YMR) by retaining radionuclides, creating locally reducing conditions, and reducing porosity. Ferrous iron, Fe{sup 2+}, has been shown to reduce UO{sub 2}{sup 2+} to UO{sub 2(s)} [1], and some ferrous ir… more
Date: October 19, 2005
Creator: Anderson, B. E.; Helean, K. B.; Bryan, C. R.; Brady, P. V. & Ewing, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Dynamically Adaptive Arbitrary Lagrangian-Eulerian Method for Hydrodynamics

Description: A new method that combines staggered grid Arbitrary Lagrangian-Eulerian (ALE) techniques with structured local adaptive mesh refinement (AMR) has been developed for solution of the Euler equations. The novel components of the combined ALE-AMR method hinge upon the integration of traditional AMR techniques with both staggered grid Lagrangian operators as well as elliptic relaxation operators on moving, deforming mesh hierarchies. Numerical examples demonstrate the utility of the method in perfor… more
Date: October 19, 2002
Creator: Anderson, R W; Pember, R B & Elliott, N S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Vibrational Analysis of Unfired Horizontal Bayonet Tubes in a Fluidized Bed Calciner

Description: The heat exchanger of the calciner consists of a vessel into which unfired, horizontal, bayonet tubes extend in a fluidized bed. Strain measurements were taken on several of the tubes under simulated operating conditions and the associated dynamic stresses were calculated. Vibrations greater than design limitations for indefinite operation were found to exist. To restrict these vibrations and prevent further tube fatigue cracking, a tube support was installed. Since the installation of the supp… more
Date: October 19, 1962
Creator: Anderson, S.D. & Hirschi, G.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of 1200ºF Sodium on Austenitic and Ferritic Steels Progress Report: September 1962

Description: This is the twenty-fifth progress report including information on two sodium loops that are still in operation and the majority of the tests have been completed, excellent agreement with no noticeable effect of sodium on sodium and air stress-to-rupture tests, and tests that did mark differences in sodium tests.
Date: October 19, 1962
Creator: Andrews, R. C.; Barker, K. R. & Werner, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Global Economic Crisis: Impact on Sub-Saharan Africa and Global Policy Responses

Description: This report analyzes Africa's vulnerability to the global crisis and potential implications for economic growth, poverty alleviation, fiscal balances, and political stability. The report describes channels through which the crisis is affecting Africa, and provides information on international efforts to address the impact, including U.S. policies and those of multilateral institutions in which the United States plays a major role.
Date: October 19, 2009
Creator: Arieff, Alexis; Weiss, Martin A. & Jones, Vivian C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

TRANSIENT TESTS OF HNPF PROTOTYPE SODIUM PUMP DRIVES

Description: The objectives of this study were to demonstrate that the pump speed control system will respond as defined in the equipment specifications and to determine optimum values of controlling variables that will minimize the oscillations that occur in the Na flow rate when transient signals are imposed on the pump speed control system. (W.L.H.)
Date: October 19, 1959
Creator: Atz, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

(Test, calibrate, and prepare a BGO photon detector system)

Description: The traveler spent the year at CERN primarily to test, calibrate, and prepare a BGO photon detector system for use in the August 1990 run of WA80 with sulfur beams and for use in future planned runs with an expanded BGO detector. The BGO was used in test-beam runs in December 1989 and April--May 1990 and in the August data-taking run. The Midrapidity Calorimeters (MIRAC) were also prepared in a new geometry for the August run with a new transverse energy trigger. The traveler also continued to … more
Date: October 19, 1990
Creator: Awes, T.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Constraints on the atmospheres of Type I supernovae

Description: The Ca II absorption lines observed in the late time optical spectra of Type I supernovae are analyzed in the context of the /sup 56/Ni model. The analysis indicates that a metal rich atmosphere of mass approx. 0.2 M/sub solar mass/ surrounds the /sup 56/Ni core. This result is consistent with properties of the atmosphere derived from spectra near maximum light.
Date: October 19, 1981
Creator: Axelrod, T.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Packaging Design Criteria for the Steel Waste Package

Description: This packaging design criteria provides the criteria for the design, fabrication, safety evaluation, and use of the steel waste package (SWP) to transport remote-handled waste and special-case waste from the 324 facility to Central Waste Complex (CWC) for interim storage.
Date: October 19, 2000
Creator: BOEHNKE, W.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Growth of Strained Epitaxial Cu Films on Ru(0001) Monitored by Surface X-Ray Diffraction

Description: The growth of Cu Layers deposited on Ru(0001) substrates at temperatures between 500 K and 850 K was studied using surface x-ray diffraction. Results are consistent with a Stransky-Krastanov growth mode with a two layer critical thickness.
Date: October 19, 1998
Creator: Baddord, A. P.; Gibbs, Doon; Zajonz, H. & Zehner, D. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

X-ray lines as a density diagnostic in DT plasmas near 100x solid density

Description: The use of electron impact broadened resonance lines to diagnose near-term high density diagnostics is discussed. In particular, the question of how to choose seed and pusher materials to have discernible broadening effects while maintaining line visibility is discussed.
Date: October 19, 1977
Creator: Bailey, D.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LCLS soft x-ray imager mirrors and their performance

Description: Soft X-ray imager mirrors have been designed, calibrated and fabricated at Lawrence Livermore National Laboratory and characterized at the Advanced Light Source for their performance between 200 and 1300 eV. The mirrors are coated with a multilayer coating consisting of 70 bilayers of W/ SiC. The mirrors are to reflect at 22.5 deg from grazing angle at 1.50 nm wavelength and the width of the reflectivity peak should be at least 1.3%. Also, the mirrors should be non-reflective elsewhere. Our mul… more
Date: October 19, 2007
Creator: Bajt, S
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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