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Pu Workshop Letter
In preparation for the upcoming Pu Workshop in Livermore, CA, USA, during July 14 and 15, 2006, we have begun to give some thought as to how the meeting will be structured and what will be discussed. Below, you will find our first proposal as to the agenda and contents of the meeting. From you, we need your feedback and suggestions concerning the desirability of each aspect of our proposal. Hopefully, we will be able to converge to a format that is acceptable to all parties. First, it now appears that we will be limited to three main sessions, Friday morning (July 14), Friday afternoon (July 14) and Saturday morning (July 15). The Pu Futures Meeting will conclude on Thursday, July 13. Following a social excursion, the Russian participants will be transported from Monterey Bay to their hotel in Livermore. We anticipate that the hotel will be the Residence Inn at 1000 Airway Blvd in Livermore. However, the hotel arrangements still need to be confirmed. We expect that many of our participants will begin their travels homeward in the afternoon of Saturday, July 15 and the morning of Sunday, July 16. Associated with the three main sessions, we propose that …
Date:
March 6, 2006
Creator:
Tobin, J G; Schwartz, A J & Fluss, M
Object Type:
Report
System:
The UNT Digital Library
Alternatives for Modeling Results from the RAND Health Insurance Experiment
This report consists of alternatives for modeling results from the RAND health insurance experiment
Date:
March 6, 2006
Creator:
Peterson, Chris L.
Object Type:
Report
System:
The UNT Digital Library
Child Nutrition and WIC Legislation in the 108th and 109th Congresses
Child nutrition programs and the Special Supplemental Nutrition Program for Women, Infants, and Children are typically subject to periodic comprehensive reviews, when several appropriations and other authorities expire and have to be reauthorized.
Date:
March 6, 2006
Creator:
Richardson, Joe
Object Type:
Report
System:
The UNT Digital Library
Dynamic Program Phase Detection in Distributed Shared-Memory Multiprocessors
We present a novel hardware mechanism for dynamic program phase detection in distributed shared-memory (DSM) multiprocessors. We show that successful hardware mechanisms for phase detection in uniprocessors do not necessarily work well in DSM systems, since they lack the ability to incorporate the parallel application's global execution information and memory access behavior based on data distribution. We then propose a hardware extension to a well-known uniprocessor mechanism that significantly improves phase detection in the context of DSM multiprocessors. The resulting mechanism is modest in size and complexity, and is transparent to the parallel application.
Date:
March 6, 2006
Creator:
Ipek, E; Martinez, J F; de Supinski, B R; McKee, S A & Schulz, M
Object Type:
Article
System:
The UNT Digital Library
Research proposal for development of an electron stripper using a thin liquid lithium film for rare isotope accelerator.
Hydrodynamic instability phenomena in a thin liquid lithium film, which has been proposed for the first stripper in the driver linac of Rare Isotope Accelerator (RIA), were discussed. Since it was considered that film instability could significantly impair the feasibility of the liquid lithium film stripper concept, potential issues and research tasks in the RIA project due to these instability phenomena were raised. In order to investigate these instability phenomena, a research proposal plan was developed. In the theoretical part of this research proposal, a use of the linear stability theory was suggested. In the experimental part, it was pointed out that the concept of Reynolds number and Weber number scaling may allow conducting a preliminary experiment using inert simulants, hence reducing technical difficulty, complexity, and cost of the experiments. After confirming the thin film formation in the preliminary experiment using simulants, demonstration experiments using liquid lithium were proposed.
Date:
March 6, 2006
Creator:
Momozaki, Y.
Object Type:
Report
System:
The UNT Digital Library
Observation of multiply ionized plasmas with dominant bound electron contribution to the index of refraction
None
Date:
March 6, 2006
Creator:
Filevich, J.; Rocca, J. J.; Marconi, M. C.; Moon, S. J.; Nilsen, J.; Scofield, J. H. et al.
Object Type:
Article
System:
The UNT Digital Library
From Non-Hermitian Effective Operators to Large-Scale No-Core Shell Model Calculations for Light Nuclei
No-core shell model (NCSM) calculations using ab initio effective interactions are very successful in reproducing experimental nuclear spectra. The main theoretical approach is the use of effective operators, which include correlations left out by the truncation of the model space to a numerically tractable size. We review recent applications of the effective operator approach, within a NCSM framework, to the renormalization of the nucleon-nucleon interaction, as well as scalar and tensor operators.
Date:
March 6, 2006
Creator:
Barrett, B R; Stetcu, I; Navratil, P & Vary, J P
Object Type:
Article
System:
The UNT Digital Library
Detailed Simulations of Atmospheric Flow and Dispersion in Urban Downtown Areas by Computational Fluid Dynamics (CFD) Models - An Application of Five CFD Models to Manhattan
Computational Fluid Dynamics (CFD) model simulations of urban boundary layers have improved so that they are useful in many types of flow and dispersion analyses. The study described here is intended to assist in planning emergency response activities related to releases of chemical or biological agents into the atmosphere in large cities such as New York City. Five CFD models (CFD-Urban, FLACS, FEM3MP, FEFLO-Urban, and Fluent-Urban) have been applied by five independent groups to the same 3-D building data and geographic domain in Manhattan, using approximately the same wind input conditions. Wind flow observations are available from the Madison Square Garden March 2005 (MSG05) field experiment. It is seen from the many side-by-side comparison plots that the CFD models simulations of near-surface wind fields generally agree with each other and with field observations, within typical atmospheric uncertainties of a factor of two. The qualitative results shown here suggest, for example, that transport of a release at street level in a large city could reach a few blocks in the upwind and crosswind directions. There are still key differences seen among the models for certain parts of the domain. Further quantitative examinations of differences among the models and the observations are …
Date:
March 6, 2006
Creator:
Hanna, S. R.; Brown, M. J.; Camelli, F. E.; Chan, S. T.; Coirier, W. J.; Hansen, O. R. et al.
Object Type:
Article
System:
The UNT Digital Library
Beam Energy Scaling of Ion-Induced Electron Yield from K+ Impact on Stainless Steel
Electron clouds limit the performance of many major accelerators and storage rings. Significant quantities of electrons result when halo ions are lost to beam tubes, generating gas which can be ionized and ion-induced electrons that can multiply and accumulate, causing degradation or loss of the ion beam. In order to understand the physical mechanisms of ion-induced electron production, experiments studied the impact of 50 to 400 keV K{sup +} ions on stainless steel surfaces near grazing incidence, using the 500 kV Ion Source Test Stand (STS-500) at LLNL. The experimental electron yield scales with the electronic component (dE{sub e}/dx) of the stopping power and its angular dependence does not follow l/cos({theta}). A theoretical model is developed, using TRIM code to evaluate dE{sub e}/dx at several depths in the target, to estimate the electron yield, which is compared with the experimental results. The experiment extends the range of energy from previous works and the model reproduces the angular dependence and magnitude of the electron yield.
Date:
March 6, 2006
Creator:
Covo, M K; Molvik, A; Friedman, A; Westenskow, G; Barnard, J J; Cohen, R et al.
Object Type:
Article
System:
The UNT Digital Library
Simulating Effects of Non-Isothermal Flow on Reactive Transport of Radionuclides Originating from an Underground Nuclear Test
Temperature can significantly affect radionuclide transport behavior. In simulation of radionuclide transport originating from an underground nuclear test, temperature effects from residual test heat include non-isothermal groundwater flow behavior (e.g. convection cells), increased dissolution rates of melt glass containing refractory radionuclides, changes in water chemistry, and, in turn, changes in radionuclide sorption behavior. The low-yield (0.75 kiloton) Cambric underground nuclear test situated in alluvium below the water table offers unique perspectives on radionuclide transport in groundwater. The Cambric test was followed by extensive post-test characterization of the radionuclide source term and a 16-year pumping-induced radionuclide migration experiment that captured more mobile radionuclides in groundwater. Discharge of pumped groundwater caused inadvertent recirculation of radionuclides through a 220-m thick vadose zone to the water table and below, including partial re-capture in the pumping well. Non-isothermal flow simulations indicate test-related heat persists at Cambric for about 10 years and induces limited thermal convection of groundwater. The test heat has relatively little impact on mobilizing radionuclides compared to subsequent pumping effects. However, our reactive transport models indicate test-related heat can raise melt glass dissolution rates up to 10{sup 4} faster than at ambient temperatures depending on pH and species activities. Non-isothermal flow simulations indicate …
Date:
March 6, 2006
Creator:
Carle, S. F.; Zavarin, M.; Shumaker, D. E.; Tompson, A. B.; Maxwell, R. M. & Pawloski, G. A.
Object Type:
Article
System:
The UNT Digital Library
Navy Littoral Combat Ship (LCS): Background and Issues for Congress
None
Date:
March 6, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Comparison of Selected Senate Earmark Reform Proposals
This report provides a comparison of these three measures: S. 2349, S. 2261, and S. 2265 with the current Senate rules and practices.
Date:
March 6, 2006
Creator:
Streeter, Sandy
Object Type:
Report
System:
The UNT Digital Library
Internet Taxation: Issues and Legislation in the 109th Congress
None
Date:
March 6, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Ensemble: 2006-03-06 – Super 400 Guitar Ensemble
Access:
Use of this item is restricted to the UNT Community
Super 400 Guitar Ensemble recital performed at the UNT College of Music Stan Kenton Hall.
Date:
March 6, 2006
Creator:
University of North Texas. Super 400 Guitar Ensemble.
Object Type:
Sound
System:
The UNT Digital Library
Oral History Interview with Al Kiracofe, March 6, 2006
The National Museum of the Pacific War presents an oral interview with Al Kiracofe. Kiracofe joined the Navy in 1942 and received yeoman training at Great Lakes. Upon completion, he was assigned to CASU-22 at Quonset Point, helping to prepare squadrons for overseas deployment. He was then assigned to Carrier Air Group 41, which was just beginning to use radar for night flying. One of his duties as yeoman was to send letters of regret to the parents of soldiers who were killed in action. The experience upset him to the point that he remembered the date of each letter for the rest of his life. He was transferred to Carrier Air Group 10 aboard the USS Intrepid (CV-11) and helped to set up squadrons in Alameda from January 1943 to September 1944. At Okinawa, a kamikaze hit caused the deaths of eight men on the Intrepid. When the ship returned to Alameda for repairs, Kiracofe was so shaken up that he was ordered to a US Naval hospital for treatment and received a medical discharge in July 1945.
Date:
March 6, 2006
Creator:
Kiracofe, Al
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Al Kiracofe, March 6, 2006
The National Museum of the Pacific War presents an oral interview with Al Kiracofe. Kiracofe joined the Navy in 1942 and received yeoman training at Great Lakes. Upon completion, he was assigned to CASU-22 at Quonset Point, helping to prepare squadrons for overseas deployment. He was then assigned to Carrier Air Group 41, which was just beginning to use radar for night flying. One of his duties as yeoman was to send letters of regret to the parents of soldiers who were killed in action. The experience upset him to the point that he remembered the date of each letter for the rest of his life. He was transferred to Carrier Air Group 10 aboard the USS Intrepid (CV-11) and helped to set up squadrons in Alameda from January 1943 to September 1944. At Okinawa, a kamikaze hit caused the deaths of eight men on the Intrepid. When the ship returned to Alameda for repairs, Kiracofe was so shaken up that he was ordered to a US Naval hospital for treatment and received a medical discharge in July 1945.
Date:
March 6, 2006
Creator:
Kiracofe, Al
Object Type:
Sound
System:
The Portal to Texas History
[News Clip: Paris Hilton, Nicole Kidman, Tom Cruise and Katie Holmes]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 6, 2006
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Paris Hilton, Nicole Kidman, Tom Cruise and Katie Holmes]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 6, 2006
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Foreign conflict/Tillman death]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 6, 2006
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Zacarias Moussaoui]
Video footage from the KXAS-TV/NBC television station in Fort Worth, Texas, to accompany a news story.
Date:
March 6, 2006
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Development of Ultra-Fast Silicon Switches for Active X-Band High Power RF Compression Systems
We present the recent results of our research on the high power ultra-fast silicon RF switches. This switch is composed of a group of PIN diodes on a high purity silicon wafer. The wafer is inserted into a cylindrical waveguide under TE{sub 01} mode, performing switching by injecting carriers into the bulk silicon. Our current design uses a CMOS compatible process and the device was fabricated at SNF (Stanford Nanofabrication Facility). 300 ns switching time has been observed, while the switching speed can be improved further with 3-D device structure and faster driving circuit. Power handling capacity of the switch is at the level of 10 MW. The switch was designed for active X-band RF pulse compression systems--especially for NLC, but it is also possible to be modified for other applications and other frequencies.
Date:
March 6, 2006
Creator:
Guo, Ji-Quan & Tantawi, S.
Object Type:
Article
System:
The UNT Digital Library
Muon-Pair Production by Atmospheric Muons in CosmoALEPH
Data from a dedicated cosmic ray run of the ALEPH detector were used in a study of muon trident production, i.e., muon pairs produced by muons. Here the overburden and the calorimeters are the target materials while the ALEPH time projection chamber provides the momentum measurements. A theoretical estimate of the muon trident cross section is obtained by developing a Monte Carlo simulation for muon propagation in the overburden and the detector. Two muon trident candidates were found to match the expected theoretical pattern. The observed production rate implies that the nuclear form factor cannot be neglected for muon tridents.
Date:
March 6, 2006
Creator:
Maciuc, F.; Grupen, C.; Hashim, N. O.; Luitz, S.; Mailov, A.; Muller, A. S. et al.
Object Type:
Article
System:
The UNT Digital Library
T-R Cycle Characterization and Imaging: Advanced Diagnostic Methodology for Petroleum Reservoir and Trap Detection and Delineation Quarterly Report: December 2005 - February 2006
The principal research effort for Year 3 of the project is to classify the known petroleum reservoirs in the Mississippi Interior Salt Basin by using a sequence stratigraphic framework based on T-R sequence terminology, to formulate exploration strategies for identifying specific facies with reservoir potential and for identifying possible stratigraphic traps using a sequence stratigraphic model in combination with the discovered reservoir classification, and to use these exploration strategies to assess the potential for underdeveloped and undiscovered petroleum resources in the Mississippi Interior Salt Basin.
Date:
March 6, 2006
Creator:
Mancini, Ernest A.; Parcell, William C. & Hart, Bruce S.
Object Type:
Report
System:
The UNT Digital Library
Gaseous Fuel Injection Modeling using a Gaseous Sphere Injection Methodology
The growing interest in gaseous fuels (hydrogen and natural gas) for internal combustion engines calls for the development of computer models for simulation of gaseous fuel injection, air entrainment and the ensuing combustion. This paper introduces a new method for modeling the injection and air entrainment processes for gaseous fuels. The model uses a gaseous sphere injection methodology, similar to liquid droplet in injection techniques used for liquid fuel injection. In this paper, the model concept is introduced and model results are compared with correctly- and under-expanded experimental data.
Date:
March 6, 2006
Creator:
Hessel, R P; Aceves, S M & Flowers, D L
Object Type:
Article
System:
The UNT Digital Library