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2012-2013 Presidential Election Period: National Security Considerations and Options

Description: This report discusses historical national security-related presidential transition activities, provides a representative sampling of national security issues a new Administration may encounter, and offers considerations and options relevant to each of the five phases of the presidential election period. Each phase has distinct challenges and opportunities for the incoming Administration, the outgoing Administration, and Congress. This report is intended to provide a framework for national secur… more
Date: October 5, 2012
Creator: Rollins, John
Item Type: Refine your search to only Report
open access

21st Century Community Learning Centers: Background and Funding

Description: This report summarizes the reauthorized Elementary and Secondary Education Act (ESEA) which contains the 21st Century Community Learning Centers (21st CCLC) program. The report covers the history of the ESEA as well as what is new in the reauthorization. Moreover, the report includes how grants are selected now, and the new focus of the program which is now exclusively for after-school-hours activities for children.
Date: February 5, 2008
Creator: McCallion, Gail
Item Type: Refine your search to only Report
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21st Century U.S. Energy Sources: A Primer

Description: This report provides an overview of U.S. energy issues, and suggests related information, data, and CRS contacts. It is mainly organized around the major fuels and energy sources: resources on federal lands, oil, natural gas, electric, coal, nuclear power, and renewable energy.
Date: November 5, 2018
Creator: Ratner, Michael; Bracmort, Kelsi; Brown, Phillip; Campbell, Richard J.; Holt, Mark; Humphries, Marc et al.
Item Type: Refine your search to only Report
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23rd IAEA Fusion Energy Conference: Summary Of Sessions EX/C and ICC

Description: An overview is given of recent experimental results in the areas of innovative confinement concepts, operational scenarios and confinement experiments as presented at the 2010 IAEA Fusion Energy Conference. Important new findings are presented from fusion devices worldwide, with a strong focus towards the scientific and technical issues associated with ITER and W7-X devices, presently under construction.
Date: January 5, 2011
Creator: Hawryluk, Richard J.
Item Type: Refine your search to only Article
open access

2w Laser Propagation and Raman Backscatter in Underdense Gas Bag Plasmas

Description: Recent 2{omega} gasbag experiments on the Helen laser studied single-beam propagation and backscatter as a function of gas density. We present a comprehensive analysis of these experiments using simulations in HYDRA. Post-processed results agree well with experimental fast x-ray images (FXI) showing stable laser propagation across the bag. The measured total stimulated Raman backscatter (SRS) increases with initial gas density up to n{sub e} {approx} 0.08 n{sub c}, then decreases. Near-backscat… more
Date: September 5, 2003
Creator: Meezan, N.; Divol, L.; Suter, L.; Miller, M.; Stevenson, R. M.; Slark, G. et al.
Item Type: Refine your search to only Article
open access

3D Computations and Experiments

Description: This project consists of two activities. Task A, Simulations and Measurements, combines all the material model development and associated numerical work with the materials-oriented experimental activities. The goal of this effort is to provide an improved understanding of dynamic material properties and to provide accurate numerical representations of those properties for use in analysis codes. Task B, ALE3D Development, involves general development activities in the ALE3D code with the focus o… more
Date: April 5, 2004
Creator: Couch, R; Faux, D; Goto, D & Nikkel, D
Item Type: Refine your search to only Report
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3D-Simulation Studies of SNS Ring Doublet Magnets

Description: The accumulator ring of the Spallation Neutron Source (SNS) at ORNL employs in its straight sections closely packed quadrupole doublemagnets with large aperture of R=15.1 cm an relatively short iron-to-iron distance of 51.4 cm. These quads have much extended fringe field, and magnetic interferences among them in the doublet assemblies is not avoidable. Though each magnet in the assemblies has been individually mapped to high accuracy of lower than 0.01 percent level, the experimental data inclu… more
Date: May 5, 2005
Creator: Wang, J. G.; N., Tsoupas & Venturini, M.
Item Type: Refine your search to only Article
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3D Simulations of the NIF Indirect Drive Ignition Target Design

Description: The radiation hydrodynamics code Hydra is used to quantify the sensitivity of different NIF ignition point designs to several 3D effects. Each of the 48 NIF quads is included in the calculations and is allowed to have different power. With this model they studied the effect on imploded core symmetry of discrete laser spots (as opposed to idealized azimuthally-averaged rings) and random variations in laser power.
Date: January 5, 2010
Creator: Jones, O. S.; Milovich, J. L.; Callahan, D. A.; Edwards, M. J.; Landen, O. L.; Salmonson, J. D. et al.
Item Type: Refine your search to only Article
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The 4K ANGIE Code

Description: The ANGIE, one of a series of reactor neutronic programs for an IBM 709 or 7090 data processing system, solves the time-dependent, multi-group, neutron diffusion equation for 1 to 26 energy groups applied to a rectangular mesh superimposed on either an x-y or an r-z plane.
Date: March 5, 1962
Creator: Stone, Stuart P.
Item Type: Refine your search to only Report
open access

Ab Initio Studies of Coke Formation on Ni Catalysts During Methane Reforming

Description: The atomic-scale processes that control the formation of carbon deposits on Ni catalysts in reforming applications are poorly understood. Ab initio Density Functional Theory calculations have been used to examine several key elementary steps in the complex network of chemical reactions that precedes carbon formation on practical catalysts. Attention has been focused on the disproportionation of CO. A comparative study of this reaction on flat and stepped crystal planes of Ni has provided the fi… more
Date: March 5, 2006
Creator: Sholl, David S.
Item Type: Refine your search to only Report
open access

Aberration correction for analytical in situ TEM - the NTEAM concept.

Description: Future aberration corrected transmission electron microscopes (TEM) will have a strong impact in materials science, since such microscopes yield information on chemical bonding and structure of interfaces, grain boundaries and lattice defects at an atomic level. Beyond this aberration correction offers new possibilities for in situ experiments performed under controlled temperature, magnetic field, strain etc. at atomic resolution. Such investigations are necessary for solving problems arising … more
Date: March 5, 2002
Creator: Kabius, B.; Allen, C. W. & Miller, D. J.
Item Type: Refine your search to only Article
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Ability to Repay, Risk-Retention Standards, and Mortgage Credit Access

Description: This report examines the developments associated with the implementation of mortgage lending reforms. The report begins with a summary of proposed ability to repay and risk-retention standards. Next, the report describes risky underwriting and financing practices that occurred prior to the mortgage crisis, followed by a discussion of how access to mortgage credit might be affected.
Date: June 5, 2012
Creator: Getter, Darryl E.
Item Type: Refine your search to only Report
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Abortion and Family Planning-Related Provisions in U.S. Foreign Assistance Law and Policy

Description: This report details legislation and policies that restrict or place requirements on U.S. funding of abortion or family planning activities abroad. The level and extent of federal funding for these activities is an ongoing and controversial issue in U.S. foreign assistance and has continued to be a point of contention during the 115th Congress.
Date: April 5, 2018
Creator: Blanchfield, Luisa
Item Type: Refine your search to only Report
open access

Abortion and Family Planning-Related Provisions in U.S. Foreign Assistance Law and Policy

Description: This report details legislation and policies that restrict or place requirements on U.S. funding of abortion or family planning activities abroad. The level and extent of federal funding for these activities is an ongoing and controversial issue in U.S. foreign assistance and will likely continue to be a point of contention during the second session of the 114th Congress.
Date: July 5, 2015
Creator: Blanchfield, Luisa
Item Type: Refine your search to only Report
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