A marine and hydrokinetic (MHK) tidal turbine extracts energy from tidal currents, providing clean, sustainable electricity generation. In general, all MHK conversion technologies are confronted with significant operational hurdles, resulting in both increased capital and operations and maintenance (O&M) costs. To counter these high costs while maintaining reliability, MHK turbine designs can be simplified. Prior study found that a tidal turbine could be cost-effectively simplified by removing blade pitch and rotor/nacelle yaw. Its rotor would run in one direction during ebb and then reverse direction when the current switched to flood. We dubbed such a turbine a bidirectional rotor tidal turbine (BRTT). The bidirectional hydrofoils of a BRTT are less efficient than conventional hydrofoils and capture less energy, but the elimination of the pitch and yaw systems were estimated to reduce levelized cost of energy by 7.8%-9.6%. In this study, we investigated two mechanisms for recapturing some of the performance shortfall of the BRTT. First, we developed a novel set of hydrofoils, designated the yy series, for BRTT application. Second, we investigated the use of active flow control via microtabs. Microtabs are small deployable/retractable tabs, typically located near the leading or trailing edge of an air/hydrofoil with height on the …

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

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

The ability of water managers to maintain adequate supplies in coming decades depends, in part, on future weather conditions, as climate change has the potential to alter river flows from their current values, possibly rendering them unable to meet demand. Reliable climate projections are therefore critical to predicting the future water supply for the United States. These projections cannot be provided solely by global climate models (GCMs), however, as their resolution is too coarse to resolve the small-scale climate changes that can affect hydrology, and hence water supply, at regional to local scales. A process is needed to ‘downscale’ the GCM results to the smaller scales and feed this into a surface hydrology model to help determine the ability of rivers to provide adequate flow to meet future needs. We apply a statistical downscaling to GCM projections of precipitation and temperature through the use of a scaling method. This technique involves the correction of the cumulative distribution functions (CDFs) of the GCM-derived temperature and precipitation results for the 20{sup th} century, and the application of the same correction to 21{sup st} century GCM projections. This is done for three meteorological stations located within the Coosa River basin in northern Georgia, …

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

A letter report issued by the Government Accountability Office with an abstract that begins "Over the past several decades, the Army and Marine Corps have increased their use of simulation-based training--simulators and computer-based simulations. Historically, the aviation communities in both services have used simulators to train servicemembers in tasks such as takeoffs, and emergency procedures that could not be taught safely live. In contrast, the services' ground communities used limited simulations prior to 2000. However, advances in technology, and emerging conditions in Iraq and Afghanistan have led to increased use of simulation-based training in the ground forces. For example, in response to increases in vehicle rollovers, both services began using simulators to train servicemembers to safely evacuate vehicles. The services are also collaborating in the development of some simulation-based training devices. For instance, according to Marine Corps officials, the service reused 87 percent of the Army's Homestation Instrumentation Training System's components in its own training system, achieving about $11 million in cost avoidance and saving an estimated 7 years in fielding time. The services are also taking steps to better integrate live and simulation-based training, developing technical capabilities to connect previously incompatible simulation-based training devices. The Army's capability is now …

A letter report issued by the Government Accountability Office with an abstract that begins "Since 2011, the Army has conducted five Network Integration Evaluations (NIE), which have provided extensive information and insights into current network capabilities and potential solutions to fill network capability gaps. According to senior Department of Defense (DOD) test officials, the NIE objective to test and evaluate network components together in a combined event is sound, as is the opportunity to reduce overall test and evaluation costs by combining test events. Further, the NIEs offer the opportunity for a more comprehensive evaluation of the broader network instead of piecemeal evaluation of individual network components. However, the Army is not taking full advantage of the potential knowledge that could be gained from the NIEs, and some resulting Army decisions are at odds with knowledge accumulated during the NIEs. For example, despite poor results in developmental testing, the Army moved forward to operational testing for several systems during the NIEs and they demonstrated similarly poor results. Yet the Army plans to buy and field several of these systems. Doing so increases the risk of poor performance in the field and the need to correct and modify deployed equipment. On …

Semi-weekly newspaper from Bastrop, Texas 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.

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

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

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

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

The long-range goal of several past and current projects in our DOE-supported research has been the development of new and improved parameterizations of cloud-radiation effects and related processes, using ARM data, and the implementation and testing of these parameterizations in global models. The main objective of the present project being reported on here has been to develop and apply advanced statistical techniques, including Bayesian posterior estimates, to diagnose and evaluate features of both observed and simulated clouds. The research carried out under this project has been novel in two important ways. The first is that it is a key step in the development of practical stochastic cloud-radiation parameterizations, a new category of parameterizations that offers great promise for overcoming many shortcomings of conventional schemes. The second is that this work has brought powerful new tools to bear on the problem, because it has been a collaboration between a meteorologist with long experience in ARM research (Somerville) and a mathematician who is an expert on a class of advanced statistical techniques that are well-suited for diagnosing model cloud simulations using ARM observations (Shen).

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

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

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

A letter report issued by the Government Accountability Office with an abstract that begins "Officials GAO interviewed inside and outside of the Internal Revenue Service (IRS) generally agreed on the potential major benefits of the Compliance Assurance Process (CAP) to taxpayers and IRS as reflected in its goals. These goals include saving IRS time and resources to use for other audits while ensuring compliance, and reducing taxpayer burden while increasing certainty on tax amounts now owed."

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

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The research conducted in this work package is aimed at taking advantage of the long term thermodynamic stability of crystalline ceramics to create more durable waste forms (as compared to high level waste glass) in order to reduce the reliance on engineered and natural barrier systems. Durable ceramic waste forms that incorporate a wide range of radionuclides have the potential to broaden the available disposal options and to lower the storage and disposal costs associated with advanced fuel cycles. Assemblages of several titanate phases have been successfully demonstrated to incorporate radioactive waste elements, and the multiphase nature of these materials allows them to accommodate variation in the waste composition. Recent work has shown that they can be produced from a melting and crystallization process. The objective of this report is to explore the phase formation and microstructural differences between lab scale melt processing in varying gas environments with alternative densification processes such as Hot Pressing (HP) and Spark Plasma Sintering (SPS). The waste stream used as the basis for the development and testing is a simulant derived from a combination of the projected Cs/Sr separated stream, the Trivalent Actinide - Lanthanide Separation by Phosphorous reagent Extraction from Aqueous Komplexes (TALSPEAK) …

This report discusses the Department of Defense (DOD) policy via the Defense Utilization and Marketing Service (DRMS) for disposing of government equipment and supplies considered surplus or deemed unnecessary to the agency's currently designated mission. The report focuses on DRMS background, as well as the most recent DRMS policy modifications.

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