We developed a new fluid property module for TOUGH2, called EOSN, to simulate transport of noble gases in the subsurface. Currently, users may select any of five different noble gases as well as CO2, two at a time. For the three gas components (air and two user-specified noble gases) in EOSN, the Henry's coefficients and the diffusivities in the gas phase are no longer assumed constants, but are temperature dependent. We used the Crovetto et al. (1982) model to estimate Henry's coefficients, and the Reid et al. (1987) correlations to calculate gas phase diffusivities. The new module requires users to provide names of the selected noble gases, which properties are provided internally. There are options for users to specify any (non-zero) molecular weights and half-lives for the gas components. We provide two examples to show applications of TOUGH2IEOSN. While temperature effects are relatively insignificant for one example problem where advection is dominant, they cause almost an order of magnitude difference for the other case where diffusion becomes a dominant process and temperature variations are relatively large. It appears that thermodynamic effects on gas diffusivities and Henry's coefficients can be important for low-permeability porous media and zones with large temperature variations.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Whether the State Board for Educator Certification may have access to school districts’ teacher appraisals to use in approving educator preparation programs and certifying new teachers (RQ-0622-JC)

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Photograph of a man and woman dancing before the Ras Tumba band at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of an unknown reggae guitarist dressed in all-white clothing leaning back while playing next to his bandmate on the keys. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of a drummer singing into his microphone with his eyes closed while drumming with an unknown reggae band. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of Ras Tumba's profile while he sings into a microphone onstage at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of a drummer in an unknown reggae band drumming and singing at the same time with his eyes shut. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of Ras Tumba leaning forward while singing into his microphone with a guitarist featured in the background. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of a drummer singing into his microphone while sitting before an electronic drum set. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of a reggae band playing their instruments onstage at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas. The heads of audience members in the crowd can be seen.

Photograph of an unknown vocalist in a tie dye shirt looking upward with an outstretched arm while singing. The vocalist is flanked by a keyboard player and a guitarist who are part of an unknown reggae band performing at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of the members of Ras Tumba performing onstage. Ras Tumba and Ras Bryan sing into their microphones, and Ras Kumba can be seen on the guitar to the left of Ras Tumba. In the background, Ras Trabal can be seen playing the keys, and Ras Ian smiles as he plays the bass. This photograph was taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of audience members in the foreground, dancing to the music played by Ras Tumba - a reggae band. In the background Ras Tumba the vocalist is seen bent over, Ras Kumba is smiling while strumming the guitar, and Ras Trabal plays the keys. This photograph was taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of an unknown reggae drummer playing an electronic drum kit with an unknown reggae band. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of an unknown keyboard player playing a Korg Triton keyboard at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of reggae singer Ras Tumba squeezing his left hand into a point-like shape while performing onstage. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of a guitarist dressed in all white playing a six-string guitar and singing into a headset microphone. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of reggae singer Ras Tumba smiling into the microphone at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Photograph of Ras Tumba dancing with an unknown woman while an unknown man dances behind them. Photograph taken at the Reggae in the Caribbean event sponsored by The Black Academy of Arts and Letters in Dallas, Texas.

Previously we showed how small admixtures of xenon (Xe) stabilize electron avalanches in liquid Argon (LAr). In the present work, we have measured the positive charge carrier mobility in LAr with small admixtures of Xe to be 6.4 x 10{sup -3} cm{sup 2}/Vsec, in approximate agreement with the mobility measured in pure LAr, and consistent with holes as charge carriers. We have measured the concentration of Xe actually dissolved in the liquid and compared the results with expectations based on the amount of Xe gas added to the LAr. We also have tested LAr doped with krypton to investigate the mechanism of avalanche stabilization.

Weekly student newspaper from San Antonio College in San Antonio, Texas that includes campus news along with advertising.

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