Resource Type
Degree Department
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In situ spectroscopic detection of SMSI effect in a Ni/CeO2 system: hydrogen-induced burial and dig out of metallic nickel
In situ APPES technique demonstrates that the strong metal support interaction effect (SMSI) in the Ni-ceria system is associated with the decoration and burial of metallic particles by the partially reduced support, a phenomenon reversible by evacuation at high temperature of the previously absorbed hydrogen.
Date:
June 29, 2010
Creator:
Caballero, Alfonso; Holgado, Juan P.; Gonzalez-delaCruz, Victor M.; Habas, Susan e.; Herranz, Tirma & Salmeron, Miquel
System:
The UNT Digital Library
Discrete deexcitations in 235U from Nuclear Resonance Fluorescence
None
Date:
June 29, 2010
Creator:
Kwan, E.; Howell, C. R.; Raut, R.; Rusev, G.; Tonchev, A. P.; Tornow, W. et al.
System:
The UNT Digital Library
Subsurface Mobile Plutonium Speciation: Sampling Artifacts for Groundwater Colloids
A recent review found several conflicting conclusions regarding colloid-facilitated transport of radionuclides in groundwater and noted that colloids can both facilitate and retard transport. Given these contrasting conclusions and the profound implications even trace concentrations of plutonium (Pu) have on the calculated risk posed to human health, it is important that the methodology used to sample groundwater colloids be free of artifacts. The objective of this study was: (1) to conduct a field study and measure Pu speciation, ({sup 239}Pu and {sup 240}Pu for reduced-Pu{sub aq}, oxidized-Pu{sub aq}, reduced-Pu{sub colloid}, and oxidized-Pu{sub colloid}), in a Savannah River Site (SRS) aquifer along a pH gradient in F-Area, (2) to determine the impact of pumping rate on Pu concentration, Pu speciation, and Pu isotopic ratios, (3) determine the impact of delayed sample processing (as opposed to processing directly from the well).
Date:
June 29, 2010
Creator:
Kaplan, D. & Buesseler, K.
System:
The UNT Digital Library
Model Predictive Control for the Operation of Building Cooling Systems
A model-based predictive control (MPC) is designed for optimal thermal energy storage in building cooling systems. We focus on buildings equipped with a water tank used for actively storing cold water produced by a series of chillers. Typically the chillers are operated at night to recharge the storage tank in order to meet the building demands on the following day. In this paper, we build on our previous work, improve the building load model, and present experimental results. The experiments show that MPC can achieve reduction in the central plant electricity cost and improvement of its efficiency.
Date:
June 29, 2010
Creator:
Ma, Yudong; Borrelli, Francesco; Hencey, Brandon; Coffey, Brian; Bengea, Sorin & Haves, Philip
System:
The UNT Digital Library
Algebraic Multigrid for Linear Systems Obtained by Explicit Element Reduction
None
Date:
June 29, 2010
Creator:
Brunner, T. A. & Kolev, T. V.
System:
The UNT Digital Library
In Situ Transmission Electron Microscopy Observations of Rapid Solidification of Aluminum Thin Films
None
Date:
June 29, 2010
Creator:
Kulovits, A; Wiezorek, J M; LaGrange, T; Reed, B W & Campbell, G H
System:
The UNT Digital Library
Application of solution techniques to rapid growth of organic crystals
None
Date:
June 29, 2010
Creator:
Zaitseva, N.; Carman, L.; Glenn, A.; Newby, J.; Faust, M.; Hamel, S. et al.
System:
The UNT Digital Library
The transfer of neutral molecules, ions and ionic species from water to ethylene glycol and to propylene carbonate; descriptors for pyridinium cations
Article on the transfer of neutral molecules, ions and ionic species from water to ethylene glycol and to propylene carbonate and descriptors for pyridinium cations.
Date:
June 29, 2010
Creator:
Abraham, M. H. (Michael H.) & Acree, William E. (William Eugene)
System:
The UNT Digital Library