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An overview of acoustic telemetry

Description: Acoustic telemetry has been a dream of the drilling industry for the past 50 years. It offers the promise of data rates which are one-hundred times greater than existing technology. Such a system would open the door to true logging-while-drilling technology and bring enormous profits to its developers. The basic idea is to produce an encoded sound wave at the bottom of the well, let it propagate up the steel drillpipe, and extract the data from the signal at the surface. Unfortunately, substant… more
Date: January 1, 1992
Creator: Drumheller, D. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Overview of image reconstruction

Description: Image reconstruction (or computerized tomography, etc.) is any process whereby a function, f, on R/sup n/ is estimated from empirical data pertaining to its integrals, ..integral..f(x) dx, for some collection of hyperplanes of dimension k < n. The paper begins with background information on how image reconstruction problems have arisen in practice, and describes some of the application areas of past or current interest; these include radioastronomy, optics, radiology and nuclear medicine, elect… more
Date: April 1, 1980
Creator: Marr, R.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hydrate detection

Description: Project objectives were: (1) to create methods of analyzing gas hydrates in natural sea-floor sediments, using available data, (2) to make estimates of the amount of gas hydrates in marine sediments, (3) to map the distribution of hydrates, (4) to relate concentrations of gas hydrates to natural processes and infer the factors that control hydrate concentration or that result in loss of hydrate from the sea floor. (VC)
Date: January 1, 1992
Creator: Dillon, W. P. & Ahlbrandt, T. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent developments in thermoacoustically-driven low-frequency projectors

Description: Thermoacoustic engines are a recent class of devices that can efficiently convert heat to acoustic energy without moving parts or intervening mechanisms. These engines have a natural potential for powering low-frequency sonar projectors with high reliability and efficiencies that cannot be matched by conventional technologies. A recent design study has produced thermoacoustic projector configurations that can execute standard projector performance requirements such as FM sweep and velocity magn… more
Date: January 1, 1992
Creator: Ward, W.C. & Merrigan, M.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pulse Jet Mixer Overblow Testing for Assessment of Loadings During Multiple Overblows

Description: The U.S. Department of Energy (DOE) Office of River Protection’s Waste Treatment Plant (WTP) is being designed and built to pretreat and then vitrify a large portion of the wastes in Hanford’s 177 underground waste storage tanks. The WTP consists of three primary facilities: pretreatment, low-activity waste (LAW) vitrification, and high-level waste (HLW) vitrification. The pretreatment facility will receive waste feed from the Hanford tank farms and separate it into 1) a high-volume, low-activi… more
Date: March 3, 2008
Creator: Pfund, David M.; Bontha, Jagannadha R.; Michener, Thomas E.; Nigl, Franz; Yokuda, Satoru T.; Leigh, Richard J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ACOUSTIC FORMING FOR ENHANCED DEWATERING AND FORMATION

Description: The next generation of forming elements based on acoustic excitation to increase drainage and enhances formation both with on-line control and profiling capabilities has been investigated in this project. The system can be designed and optimized based on the fundamental experimental and computational analysis and investigation of acoustic waves in a fiber suspension flow and interaction with the forming wire.
Date: November 30, 2007
Creator: Aidun, Cyrus K
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Technical Letter Report - Preliminary Assessment of NDE Methods on Inspection of HDPE Butt Fusion Piping Joints for Lack of Fusion

Description: The U.S. Nuclear Regulatory Commission (NRC) has a multi-year program at the Pacific Northwest National Laboratory (PNNL) to provide engineering studies and assessments of issues related to the use of nondestructive evaluation (NDE) methods for the reliable inspection of nuclear power plant components. As part of this program, there is a subtask 2D that was set up to address an assessment of issues related to the NDE of high density polyethylene (HDPE) butt fusion joints. This work is being dri… more
Date: May 29, 2008
Creator: Crawford, Susan L.; Cumblidge, Stephen E.; Doctor, Steven R.; Hall, Thomas E. & Anderson, Michael T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Acoustic Emission Precursors of M6.0 2004 Parkfield and M7.0 1989Loma Prieta Earthquakes

Description: Two recent strike-slip earthquakes on the San Andreas Fault(SAF) in California, the M6.0 2004 Parkfield and M7.0 1989 Loma Prietaevents, revealed peaks in the acoustic emission (AE) activity in thesurrounding crust several months prior to the main events. Earthquakesdirectly within the SAF zone were intentionally excluded from theanalysis. The observed increase in AE is assumed to be a signature of theincreasing stress level in the surrounding crust, while the peak andsubsequent decrease in AE … more
Date: February 1, 2005
Creator: Korneev, Valeri
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bonding Low-density Nanoporous Metal Foams Using Sputtered Solder

Description: A method has been developed for bonding low-density nanoporous metal foam components to a substrate using solder that is sputtered onto the surfaces. Metal foams have unusual properties that make them excellent choices for many applications, and as technologies for processing these materials are evolving, their use in industry is increasing dramatically. Metal foams are lightweight and have advantageous dynamic properties, which make them excellent choices for many structural applications. They… more
Date: August 21, 2007
Creator: Bono, M.; Cervantes, O.; Akaba, C.; Hamza, A.; Foreman, R. & Teslich, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Thermoelasticity of SSP Materials: An Integrated Ultrasonic and X-radiation Study

Description: It has been a very productive year for accomplishing the tasks outlined in the original proposal. Quite a few crystalline materials [tantalum (Ta), molybdenum (Mo), cerium (Ce) beryllium (Be)] and amorphous materials [zirconium tungstate (ZrW2O8), SiO2, and germanium diselenide (GeSe2) glasses] have been assessed at high pressures up to 12 GPa and acoustic velocities and densities have been obtained simultaneously using our unique technique. Major activities include sample preparation, high pre… more
Date: July 29, 2008
Creator: Li, Baosheng
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advanced Interactive Facades - Critical Elements for Future GreenBuildings?

Description: Building designers and owners have always been fascinated with the extensive use of glass in building envelopes. Today the highly glazed facade has almost become an iconic element for a 'green building' that provides daylighting and a visual connection with the natural environment. Even before the current interest in green buildings there was no shortage of highly glazed building designs. But many of these buildings either rejected sunlight, and some associated daylight and view with highly ref… more
Date: November 1, 2003
Creator: Selkowitz, Stephen; Aschehoug, Oyvind & Lee, Eleanor S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Survival of Juvenile Chinook Salmon Passing the Bonneville Dam Spillway in 2007

Description: The U.S. Army Corps of Engineers Portland District (CENWP) funds numerous evaluations of fish passage and survival on the Columbia River. In 2007, the CENWP asked Pacific Northwest National Laboratory to conduct an acoustic telemetry study to estimate the survival of juvenile Chinook salmon passing the spillway at Bonneville Dam. This report documents the study results which are intended to be used to improve the conditions juvenile anadromous fish experience when passing through the dams that … more
Date: December 1, 2008
Creator: Ploskey, Gene R.; Weiland, Mark A.; Hughes, James S.; Zimmerman, Shon A.; Durham, Robin E.; Fischer, Eric S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Separation of Yeast Cells from MS2 Viruses Using Acoustic Radiation Force

Description: We report a rapid and robust separation of Saccharomyces cerevisiae and MS2 bacteriophage using acoustic focusing in a microfluidic device. A piezoelectric transducer (PZT) generates acoustic standing waves in the microchannel. These standing waves induce acoustic radiation force fields that direct microparticles towards the nodes (i.e., pressure minima) or the anti-nodes (i.e., pressure maxima) of the standing waves depending on the relative compressidensity between the particle and the suspen… more
Date: March 27, 2008
Creator: Jung, B.; Fisher, K.; Ness, K.; Rose, K. A. & Mariella, R. P., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experimental evaluation of acoustic agglomerators as an air cleaning system concept for emergency use in LMFBR plants. Final report

Description: In the development of the Liquid Metal Fast Breeder Reactor, a major safety problem concerns the suppression of the sodium oxides aerosol particles produced during a hypothetical core disruptive accident. Some theoretical calculations are presented concerning sonic agglomeration rates of such a system in terms of acoustic frequency, intensity and particles. The information is useful in providing some guidelines for the evaluation and design of sonic systems for LMFBR emergency applications.
Date: November 1, 1979
Creator: Shaw, D T & Wegrzyn, J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Energy Edge, Post-Occupancy Evaluation Project: The Eastgate Corporate Center Bellevue, Washington

Description: The Workspace Satisfaction Survey measures occupant satisfaction with the thermal, lighting, acoustical, and air quality aspects of the work environment. In addition to ratings of these ambient environmental features, occupants also rate their satisfaction with a number of functional and aesthetic features of the office environment as well as their satisfaction with specific kinds of workspaces (e.g. computer rooms, the lobby, employee lounge, etc.) Each section on ambient conditions includes q… more
Date: June 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Condition monitoring through advanced sensor and computational technology : final report (January 2002 to May 2005).

Description: The overall goal of this joint research project was to develop and demonstrate advanced sensors and computational technology for continuous monitoring of the condition of components, structures, and systems in advanced and next-generation nuclear power plants (NPPs). This project included investigating and adapting several advanced sensor technologies from Korean and US national laboratory research communities, some of which were developed and applied in non-nuclear industries. The project team… more
Date: May 1, 2005
Creator: Kim, Jung-Taek (Korea Atomic Energy Research Institute, Daejon, Korea) & Luk, Vincent K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Energetic Particle-induced Geodesic Acoustic Mode

Description: A new energetic particle-induced Geodesic Acoustic Mode (EGAM) is shown to exist. The mode frequency, mode structure, and mode destabilization are determined non-perturbatively by energetic particle kinetic effects. In particular the EGAM frequency is found to be substantially lower than the standard GAM frequency. The radial mode width is determined by the energetic particle drift orbit width and can be fairly large for high energetic particle pressure and large safety factor. These results ar… more
Date: September 12, 2008
Creator: Fu, G. Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Near net shape forming processes for chemically prepared zinc oxide varistors.

Description: Chemically prepared zinc oxide powders are fabricated for the production of high aspect ratio varistor components. Colloidal processing in water was performed to reduce agglomerates to primary particles, form a high solids loading slurry, and prevent dopant migration. The milled and dispersed powder exhibited a viscoelastic to elastic behavioral transition at a volume loading of 43-46%. The origin of this transition was studied using acoustic spectroscopy, zeta potential measurements and oscill… more
Date: January 1, 2005
Creator: Lockwood, Steven John; Voigt, James A.; Tuttle, Bruce Andrew & Bell, Nelson Simmons
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of Crack Detection in Heavy-Walled Cast Stainless Steel Piping Welds Using Advanced Low-Frequency Ultrasonic Methods

Description: Studies conducted at the Pacific Northwest National Laboratory in Richland, Washington, have focused on assessing the effectiveness and reliability of novel approaches to nondestructive examination (NDE) for inspecting coarse-grained, cast stainless steel reactor components. The primary objective of this work is to provide information to the U.S. Nuclear Regulatory Commission on the effectiveness and reliability of advanced NDE methods as related to the inservice inspection of safety-related co… more
Date: March 1, 2007
Creator: Anderson, Michael T.; Crawford, Susan L.; Cumblidge, Stephen E.; Denslow, Kayte M.; Diaz, Aaron A. & Doctor, Steven R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Petrophysical Characterization and Reservoir Simulator for Methane Gas Production from Gulf of Mexico Hydrates

Description: Gas hydrates are crystalline, ice-like compounds of gas and water molecules that are formed under certain thermodynamic conditions. Hydrate deposits occur naturally within ocean sediments just below the sea floor at temperatures and pressures existing below about 500 meters water depth. Gas hydrate is also stable in conjunction with the permafrost in the Arctic. Most marine gas hydrate is formed of microbially generated gas. It binds huge amounts of methane into the sediments. Estimates of the … more
Date: June 30, 2006
Creator: Mohanty, Kishore; Cook, Bill; Hakimuddin, Mustafa; Pitchumani, Ramanan; Ogunlana, Damiola; Burger, Jon et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optimization of Concurrent Deployments of the Juvenile Salmon Acoustic Telemetry System and Other Hydroacoustic Equipment at John Day Dam

Description: The purpose of this report is to document the results of the acoustic optimization study conducted at John Day Dam during January and February 2008. The goal of the study was to optimize performance of the Juvenile Salmon Acoustic Telemetry System (JSATS) by determining deployment and data acquisition methods to minimize electrical and acoustic interference from various other acoustic sampling devices. Thereby, this would allow concurrent sampling by active and passive acoustic methods during t… more
Date: September 1, 2008
Creator: Ploskey, Gene R.; Hughes, James S.; Khan, Fenton; Kim, Jina; Lamarche, Brian L.; Johnson, Gary E. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Sensor for Individual Burner Control of Coal Firing Rate, Fuel-Air Ratio and Coal Fineness Correlation

Description: Accurate, cost-efficient monitoring instrumentation has long been considered essential to the operation of power plants. Nonetheless, for the monitoring of coal flow, such instrumentation has been sorely lacking and technically difficult to achieve. With more than half of the electrical power in the United States currently supplied by coal, energy generated by this resource is critical to the US economy. The demand for improvement in this area has only increased as a result of the following two… more
Date: April 1, 2006
Creator: Demler, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Highlighting High Performance: Whitman Hanson Regional High School; Whitman, Massachusetts

Description: This brochure describes the key high-performance building features of the Whitman-Hanson Regional High School. The brochure was paid for by the Massachusetts Technology Collaborative as part of their Green Schools Initiative. High-performance features described are daylighting and energy-efficient lighting, indoor air quality, solar and wind energy, building envelope, heating and cooling systems, water conservation, and acoustics. Energy cost savings are also discussed.
Date: June 1, 2006
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Resonant Ultrasound Studies of Complex Transition Metal Oxides

Description: Department of Energy EPSCoR The University of Mississippi Award: DE-FG02-04ER46121 Resonant Ultrasound Spectroscopy Studies of Complex Transition Metal Oxides The central thrust of this DOE funded research program has been to apply resonant ultrasound spectroscopy (RUS), an elegant and efficient method for determining the elastic stiffness constants of a crystal, to the complex and poorly understood class of materials known as transition metal oxides (TMOs). Perhaps the most interesting and cha… more
Date: August 18, 2008
Creator: Bass, Henry & Gladden, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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