4 Matching Results

Search Results

Results: 1 - 4
open access

HIGH RESOLUTION AND FAST SCANNING SQUID BASED NON-DESTRUCTIVE INSPECTION SYSTEM OF NIOBIUM SHEETS FOR SRF CAVITIES

Description: Applications in high energy physics accelerators and other fields require the use of thousands of superconducting RF (SRF) cavities that are made of high purity Nb material and the purity of niobium is critical for these cavities to reach the highest accelerating fields. Tantalum is the most prolific of metal inclusions, which can cause thermal breakdown and prevent the cavities from reaching their theoretical performance limits of 45-50 MV/m, and DOE Labs are searching for a technology that co… more
Date: June 8, 2008
Creator: SHU, QUAN-SHENG
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High Resolution/High Fidelity Seismic Imaging and Parameter Estimation for Geological Structure and Material Characterization

Description: Our proposed work on high resolution/high fidelity seismic imaging focused on three general areas: (1) development of new, more efficient, wave-equation-based propagators and imaging conditions, (2) developments towards amplitude-preserving imaging in the local angle domain, in particular, imaging methods that allow us to estimate the reflection as a function of angle at a layer boundary, and (3) studies of wave inversion for local parameter estimation. In this report we summarize the results a… more
Date: June 8, 2008
Creator: Wu, Ru-Shan & Xie, Xiao-Bi
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Establishing an IEZ at the K-25 Site With Realism - ANS 2008 Annual Meeting - June 8-12, 2008 Anaheim, CA

Description: The requirement from ANSI/ANS-8.3 states: (1) a criticality alarm system meeting the requirements of this standard shall be installed in areas where personnel would be subject to an excessive radiation dose; and (2) excessive dose = any dose to personnel corresponding to an absorbed dose from neutrons and gamma rays equal to or greater than 0.12 Gy (12 rad) in free air. The requirement was misconstrued to imply that the Immediate Evaluation Zone (IEZ) had to cover out to 12 Rad of dose. This mi… more
Date: June 8, 2008
Creator: Kimball, K.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydride transfer made easy in the oxidation of alcohols catalyzed by choline oxidase

Description: Choline oxidase (E.C. 1.1.3.17) catalyzes the two-step, four-electron oxidation of choline to glycine betaine with betaine aldehyde as enzyme-associated intermediate and molecular oxygen as final electron acceptor (Scheme 1). The gem-diol, hydrated species of the aldehyde intermediate of the reaction acts as substrate for aldehyde oxidation, suggesting that the enzyme may use similar strategies for the oxidation of the alcohol substrate and aldehyde intermediate. The determination of the chemic… more
Date: June 8, 2008
Creator: Gadda, G.; Orville, A.; Pennati, A.; Francis, K.; Quaye, O.; Yuan, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen