Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

We present the design and experimental progress on the diamond secondary emitter as an electron source for high average power injectors. The design criteria for average currents up to 1 A and charge up to 20 nC are established. Secondary Electron Yield (SEY) exceeding 200 in transmission mode and 50 in emission mode have been measured. Preliminary results on the design and fabrication of the self contained capsule with primary electron source and secondary electron emitter will also be presented.

Photograph of members of the Mean Green volleyball team huddling on the sidelines during a match against the University of Arkansas at Little Rock. Five individuals are standing side by side with their backs to the camera, facing something out of frame. Erica Wendell (10) and Katie Ruiz (14) can be identified among the group.

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.

Recital performed at UNT College of Music Main Auditorium.

Caustic environments are present in several industries, from nuclear power generation to the fabrication of alkalis and alumina. The most common material of construction is carbon steel but its application is limited to a maximum temperature of approximately 80 C. The use of Nickel (Ni) alloys is recommended at higher temperatures. Commercially pure Ni is the most resistant material for caustic applications both from the general corrosion and the stress corrosion cracking (SCC) perspectives. Nickel rich alloys also offer a good performance. The most important alloying elements are Ni and chromium (Cr). Molybdenum (Mo) is not a beneficial alloying element and it dissolves preferentially from the alloy in presence of caustic environments. Austenitic stainless steels such as type 304 and 316 seem less resistant to caustic conditions than even plain carbon steel. Experimental evidence shows that the most likely mechanism for SCC is anodic dissolution.

The resistance of Alloy 22 (N06022) to localized corrosion, mainly crevice corrosion, has been extensively investigated in the last few years. The effect of influencing variables such as temperature, applied potential, chloride concentration and nitrate inhibitor concentration have been addressed previously. At this time, it was important to address the effect an oxide film or scale that forms during the high temperature annealing process or solution heat treatment (SHT) and its subsequent water quenching. Electrochemical tests such as cyclic potentiodynamic polarization (CPP) have been carried out to determine the repassivation potential for localized corrosion and to assess the mode of attack on the specimens. Tests have been carried out in parallel using mill annealed (MA) specimens free from oxide on the surface. The comparative testing was carried out in six different electrolyte solutions at temperatures ranging from 60 to 100 C. Results show that the repassivation potential of the specimens containing the black anneal oxide film on the surface was practically the same as the repassivation potential for oxide-free specimens.

Alloy 22 (N06022) is highly resistant to localized corrosion. Alloy 22 may be susceptible to crevice corrosion in pure chloride (Cl{sup -}) solutions under aggressive environmental conditions. The effect of the fluoride (F{sup -}) over the crevice corrosion induced by chloride ions is still not well established. The objective of the present work was to explore the crevice corrosion resistance of this alloy to different mixtures of fluorides and chlorides. Cyclic potentiodynamic polarization (CPP) tests were conducted in deaerated aqueous solutions of pure halide ions and also in different mixtures of chloride and fluoride at 90 C and pH 6. The range of chloride concentration [Cl{sup -}] was 0.001 M {le} [Cl{sup -}] {le} 1 M and the range of molar fluoride to chloride ratio [F{sup -}]/[Cl{sup -}] was 0.1 {le} [F{sup -}]/[Cl{sup -}] {le} 10. Results showed that Alloy 22 was susceptible to crevice corrosion in all the pure chloride solutions but not in the pure fluoride solutions. Fluoride ions showed an inhibitor behavior only in mixtures with a molar ratio [F{sup -}]/[Cl{sup -}] > 2. For mixtures with a molar ratio [F{sup -}]/[Cl{sup -}] of 7 and 10 the inhibition of crevice corrosion was complete.

Semiweekly newspaper from Carthage, Texas that includes local, state, and national news along with advertising.

Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.

Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.

We present the results of our investigation of lead and niobium as suitable photocathode materials for superconducting RF injectors. Quantum efficiencies (QE) have been measured for a range of incident photon energies and a variety of cathode preparation methods, including various lead plating techniques on a niobium substrate. The effects of operating at ambient and cryogenic temperatures and different vacuum levels on the cathode QE have also been studied.

Photograph of Tara Hooser (2) on the court during a match against the University of Arkansas at Little Rock. Hooser can be seen standing in the central-left portion of the photograph from behind a net, raising three fingers on her left hand in an "OK" gesture. Two UALR players are standing on the opposite side of the net as a second UNT teammate runs toward Hooser from the background.

Photograph of Mean Green volleyball coaches standing on the sidelines during a match against the University of Arkansas at Little Rock. One woman (3rd from right) can be seen standing at the refreshments table with her back to the camera, holding a plastic cup as another woman (2nd from right) faces the court with her arms crossed. Head coach Cassie Headrick is standing on the right side of the photograph in front of a row of folding chairs, partially blocked from view by the pole of a net in the foreground.

Photograph of three members of the Mean Green volleyball team on the court during a match against the University of Arkansas at Little Rock. Brooke Engel (5), Catherine Coffey (7), and another teammate (left) are standing with their backs to the camera, facing their opponents across the net. Each of the UNT players is resting one hand on her hip.

Photograph of members of the Mean Green volleyball team huddling during a match against the University of Arkansas at Little Rock. Members of the team are standing in a circle on the court with their arms around each other, wearing North Texas jerseys. Erica Wendell (10) and Catherine Coffey (7) can be identified among the group.