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

The gallium-stabilized Pu-2.0 at. % Ga alloy undergoes a partial or incomplete low-temperature martensitic transformation from the metastable {delta} phase to the gallium-containing, monoclinic {alpha}{prime} phase near -100 C. This transformation has been shown to occur isothermally and it displays anomalous double-C kinetics in a time-temperature-transformation (TTT) diagram, where two nose temperatures anchoring an upper- and lower-C describe minima in the time for the initiation of transformation. The underlying mechanisms responsible for the double-C behavior are currently unresolved, although recent experiments suggest that a conditioning treatment--wherein, following an anneal at 375 C, the sample is held at a sub-anneal temperature for a period of time--significantly influences the upper-C of the TTT diagram. As such, elucidating the effects of the conditioning treatment upon the {delta} {yields} {alpha}{prime} transformation can provide valuable insights into the fundamental mechanisms governing the double-C kinetics of the transition. Following a high-temperature anneal, a differential scanning calorimeter (DSC) was used to establish an optimal conditioning curve that depicts the amount of {alpha}{prime} formed during the transformation as a function of conditioning temperature for a specified time. With the optimal conditioning curve as a baseline, the DSC was used to explore the circumstances under which the effects of …

Aquifer characterization needs are currently being assessed to optimize pump-and-treat remedial strategies within the 200-ZP-1 operable unit, specifically for the immediate area of the 241-T Tank Farm. This report provides a general discussion of the six identified hydrologic test methods for possible subsequent characterization within the 241-T Tank Farm area and details for implementing the large-scale recovery test after terminating pumping at the 241-Tank Farm extraction well locations.

Energy-dependent quenching of excess absorbed light energy (qE) is a vital mechanism for regulating photosynthetic light harvesting in higher plants. All of the physiological characteristics of qE have been positively correlated with charge-transfer between coupled chlorophyll and zeaxanthin molecules in the light-harvesting antenna of photosystem II (PSII). In this work, we present evidence for charge-transfer quenching in all three of the individual minor antenna complexes of PSII (CP29, CP26, and CP24), and we conclude that charge-transfer quenching in CP29 involves a de-localized state of an excitonically coupled chlorophyll dimer. We propose that reversible conformational changes in CP29 can `tune? the electronic coupling between the chlorophylls in this dimer, thereby modulating the energy of the chlorophylls-zeaxanthin charge-transfer state and switching on and off the charge-transfer quenching during qE.

This report contains the issues and regulatory developments of the Army Corps of engineers' nationwide permits program.

Photograph of Ashley Lail, senior pitcher for the North Texas softball team, pitching at a game. Both of her arms are extended above her head. She is holding the softball in her right hand, and wearing a mitt on her left hand. Her right knee is bent. Her left leg is extended out. She is looking out past the camera and straining her face.

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

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

There are times when a laser beam needs to cross between tables or even go from one room to another. This presents an interesting traffic-flow and safety challenge to both the laser safety officer and laser user. Fortunately it is a challenge that has several solutions But the simplest solution may not be the best one. For example, the simplest way to get a beam from one optical table to another is just to put a sturdy tube around it. That's a permanent solution, and it completely contains the laser beam. While this is laser safe, there can be egress issues if it blocks a walkway. One comment this author often hears is, 'We can just duck under the tube.' The fire marshal, as well as the laser safety officer, might have issues with this. Especially in the case of a darkened lab, a blocked walkway can present a hazard of its own. One good solution is to transport the beam from Point A to Point B through a fiberoptic cable, when that is possible. One should easily be able to run the fiber up and over any walkway or down through a conduit on the floor. An important concern …

A detailed chemical kinetic model is used to explore the flammability and detonability of hydrogen mixtures. In the case of flammability, a detailed chemical kinetic mechanism for hydrogen is coupled to the CHEMKIN Premix code to compute premixed, laminar flame speeds. The detailed chemical kinetic model reproduces flame speeds in the literature over a range of equivalence ratios, pressures and reactant temperatures. A series of calculation were performed to assess the key parameters determining the flammability of hydrogen mixtures. Increased reactant temperature was found to greatly increase the flame speed and the flammability of the mixture. The effect of added diluents was assessed. Addition of water and carbon dioxide were found to reduce the flame speed and thus the flammability of a hydrogen mixture approximately equally well and much more than the addition of nitrogen. The detailed chemical kinetic model was used to explore the detonability of hydrogen mixtures. A Zeldovich-von Neumann-Doring (ZND) detonation model coupled with detailed chemical kinetics was used to model the detonation. The effectiveness on different diluents was assessed in reducing the detonability of a hydrogen mixture. Carbon dioxide was found to be most effective in reducing the detonability followed by water and nitrogen. The chemical …

Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.

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

Weekly student newspaper published in Hurst, Texas serving the Tarrant County College District that includes school news and information along with advertising.

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.

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Correspondence issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) relies on a global network of critical physical and cyber infrastructure to project, support, and sustain its forces and operations worldwide. The incapacitation, exploitation, or destruction of one or more of its assets would seriously damage DOD's ability to carry out its core missions. To identify and help assure the availability of this mission-critical infrastructure, in August 2005, DOD established the Defense Critical Infrastructure Program (DCIP), assigning overall responsibility for the program to the Assistant Secretary of Defense for Homeland Defense and Americas' Security Affairs (ASD[HD&ASA]). Since 2006, ASD(HD&ASA) has collaborated with the Joint Staff to compile a list of all DOD- and non-DOD-owned infrastructure essential to accomplish the National Defense Strategy. Each critical asset on the list must undergo a vulnerability assessment, which identifies weaknesses in relation to potential threats and suggests options to address those weaknesses. Data and material designated as Sensitive Compartmented Information (SCI) or associated with Special Access Programs (SAP) are among the nation's most valued and closely guarded assets, and DOD faces inherent challenges in incorporating them into DCIP. The number of individuals authorized to access SCI and …

A pair of superconducting coupling magnets will be part of the Muon Ionization Cooling Experiment (MICE). They were designed and will be constructed by the Institute of Cryogenics and Superconductivity Technology, Harbin Institute of Technology, in collaboration with Lawrence Berkeley National Laboratory. The coupling magnet is to be cooled by using cryocoolers at 4.2K. In order to reduce the heat leak to the 4.2K cold mass from 300 K, a pair of current leads composed of conventional copper leads and high temperature superconductor (HTS) leads will be used to supply current to the magnet. This paper presents the optimization of the conventional conduction-cooled metal leads for the coupling magnet. Analyses on heat transfer down the leads using theoretical method and numerical simulation were carried out. The stray magnetic field around the HTS leads has been calculated and effects of the magnetic field on the performance of the HTS leads has also been analyzed.

This report provides information about the Status and Associated Issues of Disaster Debris Removal After Hurricane Katrina.Hurricane Katrina produced unprecedented destruction resulting in disaster debris from man-made structures.

Concert presented at the UNT College of Music Concert Hall.

Ensemble concert presented at the UNT College of Music Kenton Hall.

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

Video images of laser beams imprinted with distinguishable features are used for alignment of 192 laser beams at the National Ignition Facility (NIF). Algorithms designed to determine the position of these beams enable the control system to perform the task of alignment. Centroiding is a common approach used for determining the position of beams. However, real world beam images suffer from intensity fluctuation or other distortions which make such an approach susceptible to higher position measurement variability. Matched filtering used for identifying the beam position results in greater stability of position measurement compared to that obtained using the centroiding technique. However, this gain is achieved at the expense of extra processing time required for each beam image. In this work we explore the possibility of using a field programmable logic array (FPGA) to speed up these computations. The results indicate a performance improvement of 20 using the FPGA relative to a 3 GHz Pentium 4 processor.

Testimony issued by the Government Accountability Office with an abstract that begins "Because advisory committees provide input to federal decision makers on significant national issues, it is essential that their membership be, and be perceived as being, free from conflicts of interest and balanced as a whole. The Federal Advisory Committee Act (FACA) was enacted in 1972, in part, because of concerns that special interests had too much influence over federal agency decision makers. The General Services Administration (GSA) develops guidance on establishing and managing FACA committees. The Office of Government Ethics (OGE) develops regulations and guidance for statutory conflict-of- interest provisions that apply to some advisory committee members. As requested, this testimony discusses key findings and conclusions in our 2004 report, Federal Advisory Committees: Additional Guidance Could Help Agencies Better Ensure Independence and Balance; GAO's recommendations to GSA and OGE and their responses; and potential changes to FACA that could better ensure the independence and balance of advisory committees. For our 2004 work, we reviewed policies and procedures issued by GSA, OGE, and nine federal agencies that sponsor many committees. For this testimony, we obtained information from GSA and OGE on actions they have taken to implement our recommendations; …