Resource Type
Partner
Collection
Office of Scientific & Technical Information Technical Reports
3,759
Congressional Research Service Reports
3,003
Government Accountability Office Reports
540
Texas State Auditor's Office: Reports
145
Texas State Publications
50
End of Term Publications
24
Texas Daily Newspaper Association
11
CyberCemetery Extracted Publications
8
University Records
7
Clara Luper Collection
6
7 More
Serial/Series Title
CRS Issue Briefs
730
108th Congress
233
Fiscal Year 2003
53
107th Congress
45
Fiscal Year 2002
33
Fiscal Year 2004
21
TDNA Monthly Office Manager's Report
11
Field Demonstration of a Membrane Process to Separate Nitrogen From Natural Gas Progress Report
7
Academic Year 2002
5
Analysis of Devonian Black Shales in Kentucky for Potential Carbon Dioxide Sequestration and Enhanced Natural Gas Production Quarterly Report
5
178 More
Degree Department
Country
States
Year
Month
Language
7,563 Matching Results
Results open in a new window/tab.
prev
Results:
7,561 - 7,563 of
7,563
The Iran-Libya Sanctions Act (ILSA)
Report discussing the Iran Libya Sanctions Act as well as the legislative developments that occurred regarding the act.
Date:
July 31, 2003
Creator:
Katzman, Kenneth
System:
The UNT Digital Library
Addition of Tomographic Capabilities to NMIS
This paper describes tomographic capabilities for the Nuclear Materials Identification System (NMIS). The tomographic capabilities add weapons component spatial and material properties information that result in a more detailed item signature (template) and provide more information for physical attributes analyses. The Nuclear Materials Identification System (NMIS) is used routinely to confirm the identity of HEU components in sealed containers. It does this through a radiation signature acquired by shining a {sup 252}Cf source through the container and measuring the radiation at four detectors stacked vertically on the other side. This measurement gives a gamma and neutron radiation transmission profile of the weapons component, mixed with the radiation production due to the induced fissions in the fissile materials. This information is sufficient to match an "unknown" weapons component signature to a template signature from a reference item when measuring under controlled conditions. Tomography measures the interior of an item by making transmission measurements from all angles around the item, whereas NMIS makes the measurements from a single angle. Figure 1 is a standard example of tomographic reconstruction, the Shepp-Logan human brain phantom. The measured quantity is attenuation so high values (white) are highly attenuating areas.
Date:
March 11, 2003
Creator:
Mullens, J. A.
System:
The UNT Digital Library
Stumpage Price Trends in Texas: Annual Summary for 2002
Annual summary of average prices paid per unit of wood sold in Texas, organized by region and type of woods with various sales data and price calculations.
Date:
February 10, 2003
Creator:
Texas Forest Service
System:
The Portal to Texas History