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500 Matching Results
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Investigation of Thermal and Gamma-Irradiated Hydrolysis in Polymers Using {sup 17}O NMR
None
Date:
November 21, 2000
Creator:
Alam, Todd M.
Object Type:
Article
System:
The UNT Digital Library
Precision Manufacturing of Inertial Confinement Fusion Double Shell Laser Targets for OMEGA
Double shell targets have been built by Lawrence Livermore National Laboratory (LLNL) for inertial confinement fusion (ICF) experiments on the Omega laser at the University of Rochester and as a prelude to similar experiments on NIF. Of particular interest to ICF studies are high-precision double shell implosion targets for demonstrating thermonuclear ignition without the need for cryogenic preparation. Because the ignition tolerance to interface instabilities is rather low, the manufacturing requirements for smooth surface finishes and shell concentricity are particularly strict. This paper describes a deterministic approach to manufacturing and controlling error sources in each component. Included is the design philosophy of why certain manufacturing techniques were chosen to best reduce the errors within the target. The manufacturing plan developed for this effort created a deterministic process that, once proven, is repeatable. By taking this rigorous approach to controlling all error sources during the manufacture of each component and during assembly, we have achieved the overall 5 {micro}m dimensional requirement with sub-micron surface flaws. Strengths and weaknesses of the manufacturing process will be discussed.
Date:
November 21, 2003
Creator:
Amendt, P. A.; Bono, M. J.; Hibbard, R. L.; Castro, C. & Bennett, D. W.
Object Type:
Article
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 105, No. 213, Ed. 1 Friday, November 21, 2003
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2003
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 106, No. 193, Ed. 1 Sunday, November 21, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Doctoral Recital: 2005-11-21 – Alfredo Arjona, piano
Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
November 21, 2005
Creator:
Arjona, Alfredo
Object Type:
Sound
System:
The UNT Digital Library
Synchrotron radiation issues in future hadron colliders
Hadron machines mostly use high field superconducting magnets operating at low temperatures. Therefore the issue of extracting a SR power heat load becomes more critical and costly. Conceptual solutions to the problem exist in the form of beam screens and photon stops. Cooled beam screens are more expensive in production and operation than photon stops, but they are, unlike photon stops, routinely used in existing machines. Photon stops are the most economical solution because the heat load is extracted at room temperature. They presently consider it most prudent to work with a combined beam screen and photon stop approach, in which the photon stop absorbs most of the SR power, and the beam screen serves only the vacuum purpose. Provided that the recently launched photon stop R and D [10] supports it, we would like to explore solutions with photon stops only. This would allow to reduce the magnet apertures to a certain extent with respect to those required to accommodate high SR power compliant beam screens and reduce cost. The possibility of magnet designs, which have larger vertical apertures where large cooling capillaries can be housed at no additional cost, would allow to soften this statement somewhat and should …
Date:
November 21, 2002
Creator:
Bauer, P.; Darve, C. & Terechkine, I.
Object Type:
Article
System:
The UNT Digital Library
Scientists use GEANIE to Study Isotopes of Iridium and Europium to Improve Radiochemical Diagnostics in Nuclear Devices
Radiochemical diagnostics play an important role in helping scientists understand the detonation of a nuclear device. Sometimes some elements or isotopes are inserted as radiochemical detectors at various locations in the nuclear device. During the detonation of the device, these detectors are subjected for a short time to the intense flux of neutrons emitted through fission and possibly through fusion of light elements (usually deuterium and tritium). After the detonation, the radiochemical detectors and their long-lived activation products are retrieved from the area where the underground explosion took place. These radiochemical samples are analyzed to extract information about how the device operated. A large amount of such radiochemical data exist from past nuclear-device tests.
Date:
November 21, 2002
Creator:
Becker, J. A. & Nelson, R.
Object Type:
Report
System:
The UNT Digital Library
The Rice Thresher, Vol. 91, No. 13, Ed. 1 Friday, November 21, 2003
A weekly student newspaper from the Rice University in Houston, Texas that includes campus news and commentaries along with advertising.
Date:
November 21, 2003
Creator:
Berenson, Mark
Object Type:
Newspaper
System:
The Portal to Texas History
Detailed summary of the working group on environmental control (T6)
For the next generation of large accelerators, the civil engineering of accelerator tunnels and associated underground enclosures will be a major component of the technical challenge of building such machines. Because of the large scale involved, the engineering will be required to be as cost-effective as possible, and issues such as ground motion and artificial sources of vibration in the environment will need to be carefully considered. installation and alignment of the machine components will be tasks of unprecedented scope, and will require unprecedented precision. Examine in detail the most important and most difficult aspects of these challenges, both from the point of view of performance and cost-effectiveness. In particular, identify what the site requirements are for the different machines under discussion (JLC, NLC, TESLA, VLHC, Muon source), and describe how tunneling methods are affected by them. Identify, for the different types of accelerators, the different length scales that are involved in defining the alignment tolerances, and what are the tolerances over that length scale. Specify the R and D efforts needed to define the scope of the most critical challenges, and prioritize the efforts, in terms of the potential to provide maximal performance and/or cost-effectiveness. Establish a technology-limited time …
Date:
November 21, 2002
Creator:
Bialowons, Wilhelm; Laughton, Chris & Seryi, Andrei
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 2006-11-21 – Flute Choir
Access:
Use of this item is restricted to the UNT Community
Flute choir concert performed at the UNT College of Music Recital Hall
Date:
November 21, 2006
Creator:
Blaylock, Kristan
Object Type:
Sound
System:
The UNT Digital Library
Betatron motion with coupling of horizontal and vertical degrees of freedom
The Courant-Snyder parameterization of one-dimensional linear betatron motion is generalized to two-dimensional coupled linear motion. To represent the 4 x 4 symplectic transfer matrix the following ten parameters were chosen: four beta-functions, four alpha-functions and two betatron phase advances which have a meaning similar to the Courant-Snyder parameterization. Such a parameterization works equally well for weak and strong coupling and can be useful for analysis of coupled betatron motion in circular accelerators as well as in transfer lines. Similarly, the transfer matrix, the bilinear form describing the phase space ellipsoid and the second order moments are related to the eigen-vectors. Corresponding equations can be useful in interpreting tracking results and experimental data.
Date:
November 21, 2002
Creator:
Bogacz, S. A. & Lebedev, V. A.
Object Type:
Article
System:
The UNT Digital Library
Operation Enduring Freedom: Potential Air Power Questions for Congress
This report discusses questions Congress may have concerning the effective use of air power during operation Enduring Freedom, including which aircraft are likely to be involved and how they are used.
Date:
November 21, 2001
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
Earned Value Management (EVM) as an Oversight Tool for Major Capital Investments
None
Date:
November 21, 2007
Creator:
Brass, Clinton T.
Object Type:
Report
System:
The UNT Digital Library
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 108, No. 20, Ed. 1 Thursday, November 21, 2002
Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date:
November 21, 2002
Creator:
Bridges, G. Frank & Bridges, Georgie
Object Type:
Newspaper
System:
The Portal to Texas History
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 114, No. 21, Ed. 1 Wednesday, November 21, 2007
Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date:
November 21, 2007
Creator:
Bridges, Steven W.
Object Type:
Newspaper
System:
The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 88, No. 34, Ed. 1 Thursday, November 21, 2002
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2002
Creator:
Broaddus, Matthew B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 89, No. 62, Ed. 1 Friday, November 21, 2003
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2003
Creator:
Broaddus, Matthew B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 90, No. 59, Ed. 1 Sunday, November 21, 2004
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2004
Creator:
Broaddus, Matthew B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 91, No. 58, Ed. 1 Monday, November 21, 2005
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2005
Creator:
Broaddus, Matthew B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Sanger Courier (Sanger, Tex.), Vol. 103, No. 49, Ed. 1 Thursday, November 21, 2002
Weekly newspaper from Sanger, Texas that includes local, state, and national news along with extensive advertising.
Date:
November 21, 2002
Creator:
Brown, Crystal
Object Type:
Newspaper
System:
The Portal to Texas History
Daily Journal (Perry, Okla.), Vol. 107, No. 229, Ed. 1 Tuesday, November 21, 2000
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2000
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Daily Journal (Perry, Okla.), Vol. 108, No. 229, Ed. 1 Wednesday, November 21, 2001
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2001
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Daily Journal (Perry, Okla.), Vol. 109, No. 228, Ed. 1 Thursday, November 21, 2002
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2002
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 110, No. 217, Ed. 1 Friday, November 21, 2003
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 21, 2003
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History