Sample records for general compression usa

  1. FUJIFILM Hunt Chemicals U.S.A. Achieves Compressed Air System...

    Broader source: Energy.gov (indexed) [DOE]

    FUJIFILM Hunt Chemicals U.S.A. Achieves Compressed Air System Energy-Reduction Goals with a Three-Phased Strategy FUJIFILM Hunt Chemicals U.S.A. Achieves Compressed Air System...

  2. Investing in Our Energy Future: The Story of General Compression...

    Broader source: Energy.gov (indexed) [DOE]

    General Compression February 29, 2012 - 9:23am Addthis April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs What does government funding mean to...

  3. Generalized one-dimensional, steady, compressible flow

    SciTech Connect (OSTI)

    Young, F.M. (Lamar Univ., Beaumont, TX (United States))

    1993-01-01T23:59:59.000Z

    The present development and testing of a generalized method for analytically examining 1D steady flow of perfect gases allows area change, heat transfer, friction, and mass injection. Generalized flow functions are developed, and sample tables are calculated and tested for both simple cases and combined changes. Normal shocks are noted to occur from the supersonic portion of these loci to the subsonic portion, in a manner analogous to simple-change behavior. 9 refs.

  4. 2012 ARPA-E Energy Innovation Summit: Profiling General Compression: A River of Wind

    ScienceCinema (OSTI)

    Marcus, David; Ingersoll, Eric

    2012-03-21T23:59:59.000Z

    The third annual ARPA-E Energy Innovation Summit was held in Washington D.C. in February, 2012. The event brought together key players from across the energy ecosystem - researchers, entrepreneurs, investors, corporate executives, and government officials - to share ideas for developing and deploying the next generation of energy technologies. A few videos were selected for showing during the Summit to attendees. These 'performer videos' highlight innovative research that is ongoing and related to the main topics of the Summit's sessions. Featured in this video are David Marcus, Founder of General Compression, and Eric Ingersoll, CEO of General Compression. General Compression, with the help of ARPA-E funding, has created an advanced air compression process which can store and release more than a weeks worth of the energy generated by wind turbines.

  5. 2012 ARPA-E Energy Innovation Summit: Profiling General Compression: A River of Wind

    SciTech Connect (OSTI)

    Marcus, David; Ingersoll, Eric

    2012-02-29T23:59:59.000Z

    The third annual ARPA-E Energy Innovation Summit was held in Washington D.C. in February, 2012. The event brought together key players from across the energy ecosystem - researchers, entrepreneurs, investors, corporate executives, and government officials - to share ideas for developing and deploying the next generation of energy technologies. A few videos were selected for showing during the Summit to attendees. These 'performer videos' highlight innovative research that is ongoing and related to the main topics of the Summit's sessions. Featured in this video are David Marcus, Founder of General Compression, and Eric Ingersoll, CEO of General Compression. General Compression, with the help of ARPA-E funding, has created an advanced air compression process which can store and release more than a weeks worth of the energy generated by wind turbines.

  6. ENGINEER MEMOIRS LIEUTENANT GENERAL WALTER K. WILSON, JR., USA, RETIRED

    E-Print Network [OSTI]

    US Army Corps of Engineers

    went to Mobile as District Engineer in 1949. This was his first experience with a heavy workload in both civil works and military construction. Wilson left Mobile for a brief term as South Atlantic managing projects for the Air Force. General Wilson was Deputy Chief of Engineers for Construction

  7. General Compression Looks at Energy Storage from a Different Angle |

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers3.pdf0-45.pdf0 Budget Fossil EnergyFullGOof Energy General Assembly of

  8. Numerical solution of shock and ramp compression for general material properties

    SciTech Connect (OSTI)

    Swift, D C

    2009-01-28T23:59:59.000Z

    A general formulation was developed to represent material models for applications in dynamic loading. Numerical methods were devised to calculate response to shock and ramp compression, and ramp decompression, generalizing previous solutions for scalar equations of state. The numerical methods were found to be flexible and robust, and matched analytic results to a high accuracy. The basic ramp and shock solution methods were coupled to solve for composite deformation paths, such as shock-induced impacts, and shock interactions with a planar interface between different materials. These calculations capture much of the physics of typical material dynamics experiments, without requiring spatially-resolving simulations. Example calculations were made of loading histories in metals, illustrating the effects of plastic work on the temperatures induced in quasi-isentropic and shock-release experiments, and the effect of a phase transition.

  9. ANALYSIS OF GENERALIZED FORCHHEIMER FLOWS OF COMPRESSIBLE FLUIDS IN POROUS MEDIA

    E-Print Network [OSTI]

    -term, power, and three-term laws. The non-linear Forchheimer equation is inverted to a non-linear Darcy.2. Boundary conditions 6 3. Non-Linear Darcy Equation and Monotonicity 7 4. Initial Boundary Value Problem, 2009. Key words and phrases. non-linear Darcy, generalized Forchheimer equations, porous media, long

  10. IEEE Power and Energy Society General Meeting, July 2010, Minneapolis, MN USA c 2010 IEEE A cutset area concept for phasor monitoring

    E-Print Network [OSTI]

    Dobson, Ian

    IEEE Power and Energy Society General Meeting, July 2010, Minneapolis, MN USA c 2010 IEEE A cutset area concept for phasor monitoring Ian Dobson, Fellow IEEE ECE Department University of Wisconsin together voltage angle phasor measurements at several buses to measure the angle stress across an area

  11. Compression embedding

    SciTech Connect (OSTI)

    Sandford, II, Maxwell T. (Los Alamos, NM); Handel, Theodore G. (Los Alamos, NM); Bradley, Jonathan N. (Los Alamos, NM)

    1998-01-01T23:59:59.000Z

    A method and apparatus for embedding auxiliary information into the digital representation of host data created by a lossy compression technique and a method and apparatus for constructing auxiliary data from the correspondence between values in a digital key-pair table with integer index values existing in a representation of host data created by a lossy compression technique. The methods apply to data compressed with algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as ordered sequences of blocks containing integer indices having redundancy and uncertainty of value by one unit, allowing indices which are adjacent in value to be manipulated to encode auxiliary data. Also included is a method to improve the efficiency of lossy compression algorithms by embedding white noise into the integer indices. Lossy compression methods use loss-less compression to reduce to the final size the intermediate representation as indices. The efficiency of the loss-less compression, known also as entropy coding compression, is increased by manipulating the indices at the intermediate stage. Manipulation of the intermediate representation improves lossy compression performance by 1 to 10%.

  12. Compression embedding

    DOE Patents [OSTI]

    Sandford, M.T. II; Handel, T.G.; Bradley, J.N.

    1998-07-07T23:59:59.000Z

    A method and apparatus for embedding auxiliary information into the digital representation of host data created by a lossy compression technique and a method and apparatus for constructing auxiliary data from the correspondence between values in a digital key-pair table with integer index values existing in a representation of host data created by a lossy compression technique are disclosed. The methods apply to data compressed with algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as ordered sequences of blocks containing integer indices having redundancy and uncertainty of value by one unit, allowing indices which are adjacent in value to be manipulated to encode auxiliary data. Also included is a method to improve the efficiency of lossy compression algorithms by embedding white noise into the integer indices. Lossy compression methods use loss-less compression to reduce to the final size the intermediate representation as indices. The efficiency of the loss-less compression, known also as entropy coding compression, is increased by manipulating the indices at the intermediate stage. Manipulation of the intermediate representation improves lossy compression performance by 1 to 10%. 21 figs.

  13. Compression Aware Physical Database Design

    E-Print Network [OSTI]

    Kimura, Hideaki; Syamala, Manoj

    2011-01-01T23:59:59.000Z

    Modern RDBMSs support the ability to compress data using methods such as null suppression and dictionary encoding. Data compression offers the promise of significantly reducing storage requirements and improving I/O performance for decision support queries. However, compression can also slow down update and query performance due to the CPU costs of compression and decompression. In this paper, we study how data compression affects choice of appropriate physical database design, such as indexes, for a given workload. We observe that approaches that decouple the decision of whether or not to choose an index from whether or not to compress the index can result in poor solutions. Thus, we focus on the novel problem of integrating compression into physical database design in a scalable manner. We have implemented our techniques by modifying Microsoft SQL Server and the Database Engine Tuning Advisor (DTA) physical design tool. Our techniques are general and are potentially applicable to DBMSs that support other co...

  14. Compression embedding

    DOE Patents [OSTI]

    Sandford, M.T. II; Handel, T.G.; Bradley, J.N.

    1998-03-10T23:59:59.000Z

    A method of embedding auxiliary information into the digital representation of host data created by a lossy compression technique is disclosed. The method applies to data compressed with lossy algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as integer indices having redundancy and uncertainty in value by one unit. Indices which are adjacent in value are manipulated to encode auxiliary data. By a substantially reverse process, the embedded auxiliary data can be retrieved easily by an authorized user. Lossy compression methods use loss-less compressions known also as entropy coding, to reduce to the final size the intermediate representation as indices. The efficiency of the compression entropy coding, known also as entropy coding is increased by manipulating the indices at the intermediate stage in the manner taught by the method. 11 figs.

  15. Compression embedding

    DOE Patents [OSTI]

    Sandford, II, Maxwell T. (Los Alamos, NM); Handel, Theodore G. (Los Alamos, NM); Bradley, Jonathan N. (Los Alamos, NM)

    1998-01-01T23:59:59.000Z

    A method of embedding auxiliary information into the digital representation of host data created by a lossy compression technique. The method applies to data compressed with lossy algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as integer indices having redundancy and uncertainty in value by one unit. Indices which are adjacent in value are manipulated to encode auxiliary data. By a substantially reverse process, the embedded auxiliary data can be retrieved easily by an authorized user. Lossy compression methods use loss-less compressions known also as entropy coding, to reduce to the final size the intermediate representation as indices. The efficiency of the compression entropy coding, known also as entropy coding is increased by manipulating the indices at the intermediate stage in the manner taught by the method.

  16. General Compression | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualPropertyd8c-a9ae-f8521cbb8489InformationFrenchtown,

  17. FRACTAL APPROXIMATION AND COMPRESSION USING PROJECTED IFS

    E-Print Network [OSTI]

    Baskurt, Atilla

    FRACTAL APPROXIMATION AND COMPRESSION USING PROJECTED IFS �ric Guérin, �ric Tosan and Atilla, or images) with fractal models is an important center of interest for research. The general inverse problem.The most known of them is the fractal image compression method introduced by Jacquin. Generally speaking

  18. Offshore Wind Power USA

    Broader source: Energy.gov [DOE]

    The Offshore Wind Power USA conference provides the latest offshore wind market updates and forecasts.

  19. Compressed Gas EHS-2200-WEB

    E-Print Network [OSTI]

    Compressed Gas Safety EHS-2200-WEB Register and launch through http://axess.stanford.edu Course title and STARS number: General Safety & Emergency Preparedness EHS-4200-WEB Chemical Safety for Laboratories EHS-1900-WEB Biosafety EHS-1500-WEB Radiation Safety Training EHS-5250 Laser Safety EHS-4820-WEB

  20. High-Efficiency Clean Combustion Engine Designs for Compression...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Russ Durrett For Public Release GM R&D - Diesel Engine Systems High-Efficiency Clean Combustion Engine Designs for Compression Ignition Engines Russ Durrett, Xin He - General...

  1. Compression mode resonances in Zr-90

    E-Print Network [OSTI]

    Youngblood, David H.; Lui, YW; John, B.; Tokimoto, Y.; Clark, HL; Chen, X.

    2004-01-01T23:59:59.000Z

    Compression mode resonances in 90Zr D. H. Youngblood, Y.-W. Lui, B. John,* Y. Tokimoto, H. L. Clark, and X. Chen Cyclotron Institute, Texas A&M University, College Station, Texas 77843, USA (Received 18 February 2004; published 20 May 2004..., JOHN, TOKIMOTO, CLARK, AND CHEN PHYSICAL REVIEW C 69, 054312 (2004) 054312-2 Fig. 2. The continuum distributions are similar over the en- tire energy range, whereas the angular distributions of the cross sections for the peak change...

  2. The Many Faces of a Compressed Air Audit

    E-Print Network [OSTI]

    Kemp, H. L.

    2006-01-01T23:59:59.000Z

    with independent compressed air consultant organizations. Energy Audits Supplied by DOE-Sponsored University Students University students led by their instructors as part of their training perform these studies. Often the reports are accurate about...Air Power USA, Inc. PO Box 292 Pickerington, OH 43147 740 862-4112 740 862-8464 (Fax) www.airpowerusainc.com THE MANY FACES OF A COMPRESSED AIR AUDIT Industrial Energy Technology Conference May 9-12, 2006 New Orleans, LA Today...

  3. Compressed Air Supply Efficiency

    E-Print Network [OSTI]

    Joseph, B.

    2004-01-01T23:59:59.000Z

    This project, under contract from California Energy Commission, developed the CASE (Compressed Air Supply Efficiency) Index as a stand-alone value for compressor central plant efficiency. This Index captures the overall efficiency of a compressed...

  4. Sequential Compressed Sensing

    E-Print Network [OSTI]

    Malioutov, Dmitry M.

    Compressed sensing allows perfect recovery of sparse signals (or signals sparse in some basis) using only a small number of random measurements. Existing results in compressed sensing literature have focused on characterizing ...

  5. Compressed Air Supply Efficiency 

    E-Print Network [OSTI]

    Joseph, B.

    2004-01-01T23:59:59.000Z

    COMPRESSED AIR SUPPLY EFFICENCY Babu Joseph, Ph.D., P.E. Engineer Southern California Edison Irwindale, CA ABSTRACT This project, under contract from California Energy Commission, developed the CASE (Compressed Air Supply Efficiency...

  6. Consider Compressed Combustion

    E-Print Network [OSTI]

    Crowther, R. H.

    1982-01-01T23:59:59.000Z

    sharing systems employing gas turbines. Incentives for compressed combustion have been explored and are presented in this discussion....

  7. Compressed gas manifold

    DOE Patents [OSTI]

    Hildebrand, Richard J. (Edgemere, MD); Wozniak, John J. (Columbia, MD)

    2001-01-01T23:59:59.000Z

    A compressed gas storage cell interconnecting manifold including a thermally activated pressure relief device, a manual safety shut-off valve, and a port for connecting the compressed gas storage cells to a motor vehicle power source and to a refueling adapter. The manifold is mechanically and pneumatically connected to a compressed gas storage cell by a bolt including a gas passage therein.

  8. Compressing magnetic fields with high-energy lasersa... J. P. Knauer,1,b

    E-Print Network [OSTI]

    Compressing magnetic fields with high-energy lasersa... J. P. Knauer,1,b O. V. Gotchev,1,2,3 P. Y, Rochester, New York 14623, USA 3 Department of Mechanical Engineering, University of Rochester, 250 East-driven magnetic-field compression producing a magnetic field of tens of megaGauss is reported for the first time

  9. Sympathetically cooled and compressed positron plasma B. M. Jelenkovic,1,2

    E-Print Network [OSTI]

    progress has been obtained over the last decade in trapping and cooling positrons 8­14 . Recent experimentsSympathetically cooled and compressed positron plasma B. M. Jelenkovic´,1,2 A. S. Newbury,1, * J. J, USA Received 27 February 2003; published 18 June 2003 We report sympathetic cooling and compression

  10. Simple lossless and near-lossless waveform compression Tony Robinson

    E-Print Network [OSTI]

    Lazar, Aurel A.

    these requirements. A signi cant application of this program is to the problem of compression of speech les problems associated with general waveform compression, namely predictive modelling and residual coding at the xed bit rate. Similarly there has been much work in design of general purpose lossless compressors

  11. Hydrogen Delivery Liquefaction and Compression

    Broader source: Energy.gov [DOE]

    Hydrogen Delivery Liquefaction and Compression - Overview of commercial hydrogen liquefaction and compression and opportunities to improve efficiencies and reduce cost.

  12. Compressed Gas Safety for Experimental Fusion Facilities

    SciTech Connect (OSTI)

    Lee C. Cadwallader

    2004-09-01T23:59:59.000Z

    Experimental fusion facilities present a variety of hazards to the operators and staff. There are unique or specialized hazards, including magnetic fields, cryogens, radio frequency emissions, and vacuum reservoirs. There are also more general industrial hazards, such as a wide variety of electrical power, pressurized air, and cooling water systems in use, there are crane and hoist loads, working at height, and handling compressed gas cylinders. This paper outlines the projectile hazard assoicated with compressed gas cylinders and mthods of treatment to provide for compressed gas safety. This information should be of interest to personnel at both magnetic and inertial fusion experiments.

  13. Compressed Gas Safety for Experimental Fusion Facilities

    SciTech Connect (OSTI)

    Cadwallader, L.C. [Idaho National Engineering and Environmental Laboratory (United States)

    2005-05-15T23:59:59.000Z

    Experimental fusion facilities present a variety of hazards to the operators and staff. There are unique or specialized hazards, including magnetic fields, cryogens, radio frequency emissions, and vacuum reservoirs. There are also more general industrial hazards, such as a wide variety of electrical power, pressurized air and cooling water systems in use, there are crane and hoist loads, working at height, and handling compressed gas cylinders. This paper outlines the projectile hazard associated with compressed gas cylinders and methods of treatment to provide for compressed gas safety. This information should be of interest to personnel at both magnetic and inertial fusion experiments.

  14. OPTIMAL CONTROL EXPERIMENTATION OF COMPRESSION TRAJECTORIES FOR A LIQUID PISTON AIR COMPRESSOR

    E-Print Network [OSTI]

    Li, Perry Y.

    efficiency for a given compression time and compression ratio. The main part of the heat transfer model profile for a general heat transfer model. While the results show a good improvement both in the lumped

  15. LAPPED TRANSFORMS COMPRESSION

    E-Print Network [OSTI]

    de Queiroz, Ricardo L.

    Chapter 6 LAPPED TRANSFORMS FOR IMAGE COMPRESSION Ricardo L. de Queiroz Digital Imaging Technology aspects of lapped transforms and their applications to image compression. It is a subject that has been extensively studied mainly because lapped transforms are closely related to filter banks, wavelets, and time

  16. Fundamentals of Compressed Air Systems

    Office of Energy Efficiency and Renewable Energy (EERE)

    Find out how a compressed air system works and the benefits of optimal compressed air system performance. This initial class demonstrates how to compute the current cost of your plant's compressed...

  17. Compressed Gas Cylinder Safety I. Background. Due to the nature

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    Compressed Gas Cylinder Safety I. Background. Due to the nature of gas cylinders hazards of a ruptured cylinder. There are almost 200 different types of materials in gas cylinders, there are several general procedures to follow for safe storage and handling of a compressed gas cylinder: II

  18. A Compressed Air Reduction Program

    E-Print Network [OSTI]

    Hawks, K. D.

    A COMPRESSED AIR REDUCTION PROGRAM K. Dwight Hawks General Motors Corporation - Ruick-Oldsmobi1e-Cadillac Group Warren, Michigan ABSTRACT The reascn for implementing this program was to assist the plant in Quantifying some of its leaks... in the equipme~t throuqhout the plant and to provide direction as to which leaks are yenerat~ng high uti 1ity costs. The direction is very beneficial in lIlaking maintenance aware of prolill,Pls within equipment .IS \\Iell as notifying them as to whf're thei...

  19. A space-charge-neutralizing plasma for beam drift compression P.K. Roya,, P.A. Seidl a

    E-Print Network [OSTI]

    Gilson, Erik

    - long final focus solenoid (FFS). Measured data show that the plasma forms a thin column of diameter $5A space-charge-neutralizing plasma for beam drift compression P.K. Roya,Ã?, P.A. Seidl a , A. Anders of California, Berkeley, CA 94720, USA c Princeton Plasma Physics Laboratory, Princeton, NJ 08543, USA d

  20. Modeling Compressed Turbulence

    SciTech Connect (OSTI)

    Israel, Daniel M. [Los Alamos National Laboratory

    2012-07-13T23:59:59.000Z

    From ICE to ICF, the effect of mean compression or expansion is important for predicting the state of the turbulence. When developing combustion models, we would like to know the mix state of the reacting species. This involves density and concentration fluctuations. To date, research has focused on the effect of compression on the turbulent kinetic energy. The current work provides constraints to help development and calibration for models of species mixing effects in compressed turbulence. The Cambon, et al., re-scaling has been extended to buoyancy driven turbulence, including the fluctuating density, concentration, and temperature equations. The new scalings give us helpful constraints for developing and validating RANS turbulence models.

  1. DuraLamp USA: Proposed Penalty (2010-CE-0912)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that DuraLamp USA, Inc. failed to certify a variety of general service fluorescent lamps as compliant with the applicable energy conservation standards.

  2. Fuel-Free Compressed-Air Energy Storage: Fuel-Free, Ubiquitous Compressed-Air Energy Storage and Power Conditioning

    SciTech Connect (OSTI)

    None

    2010-09-13T23:59:59.000Z

    GRIDS Project: General Compression has developed a transformative, near-isothermal compressed air energy storage system (GCAES) that prevents air from heating up during compression and cooling down during expansion. When integrated with renewable generation, such as a wind farm, intermittent energy can be stored in compressed air in salt caverns or pressurized tanks. When electricity is needed, the process is reversed and the compressed air is expanded to produce electricity. Unlike conventional compressed air energy storage (CAES) projects, no gas is burned to convert the stored high-pressure air back into electricity. The result of this breakthrough is an ultra-efficient, fully shapeable, 100% renewable and carbon-free power product. The GCAES™ system can provide high quality electricity and ancillary services by effectively integrating renewables onto the grid at a cost that is competitive with gas, coal and nuclear generation.

  3. Mechanical Compression Heat Pumps 

    E-Print Network [OSTI]

    Apaloo, T. L.; Kawamura, K.; Matsuda, J.

    1986-01-01T23:59:59.000Z

    to develop, design and test compressors built to meet the needs of the mechanically demanding industrial heat pump applications which often require high compression ratios and temperatures in excess of 200 degrees F. This paper will review the theoretical...

  4. Padding with Compressed Air

    E-Print Network [OSTI]

    Beals, C.

    2004-01-01T23:59:59.000Z

    We commonly find plants using padding to transport liquids or light solids short distances from tankers into storage tanks. Padding can wreck havoc in compressed air systems with limited storage, undersized cleanup equipment (dryers and filters...

  5. Variable valve timing in a homogenous charge compression ignition engine

    DOE Patents [OSTI]

    Lawrence, Keith E.; Faletti, James J.; Funke, Steven J.; Maloney, Ronald P.

    2004-08-03T23:59:59.000Z

    The present invention relates generally to the field of homogenous charge compression ignition engines, in which fuel is injected when the cylinder piston is relatively close to the bottom dead center position for its compression stroke. The fuel mixes with air in the cylinder during the compression stroke to create a relatively lean homogeneous mixture that preferably ignites when the piston is relatively close to the top dead center position. However, if the ignition event occurs either earlier or later than desired, lowered performance, engine misfire, or even engine damage, can result. The present invention utilizes internal exhaust gas recirculation and/or compression ratio control to control the timing of ignition events and combustion duration in homogeneous charge compression ignition engines. Thus, at least one electro-hydraulic assist actuator is provided that is capable of mechanically engaging at least one cam actuated intake and/or exhaust valve.

  6. Wavelet/scalar quantization compression standard for fingerprint images

    SciTech Connect (OSTI)

    Brislawn, C.M.

    1996-06-12T23:59:59.000Z

    US Federal Bureau of Investigation (FBI) has recently formulated a national standard for digitization and compression of gray-scale fingerprint images. Fingerprints are scanned at a spatial resolution of 500 dots per inch, with 8 bits of gray-scale resolution. The compression algorithm for the resulting digital images is based on adaptive uniform scalar quantization of a discrete wavelet transform subband decomposition (wavelet/scalar quantization method). The FBI standard produces archival-quality images at compression ratios of around 15 to 1 and will allow the current database of paper fingerprint cards to be replaced by digital imagery. The compression standard specifies a class of potential encoders and a universal decoder with sufficient generality to reconstruct compressed images produced by any compliant encoder, allowing flexibility for future improvements in encoder technology. A compliance testing program is also being implemented to ensure high standards of image quality and interchangeability of data between different implementations.

  7. Compressive Rendering of Multidimensional Scenes

    E-Print Network [OSTI]

    Sen, Pradeep

    Compressive Rendering of Multidimensional Scenes Pradeep Sen, Soheil Darabi, and Lei Xiao Advanced of using compressed sensing to reconstruct the 2D images produced by a rendering system, a process we called compressive rendering. In this work, we present the natural extension of this idea

  8. Efficiency Considerations of Diesel Premixed Charge Compression...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Efficiency Considerations of Diesel Premixed Charge Compression Ignition Combustion Efficiency Considerations of Diesel Premixed Charge Compression Ignition Combustion Poster...

  9. Hydrogen Compression, Storage, and Dispensing Cost Reduction...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Compression, Storage, and Dispensing Cost Reduction Workshop Addendum Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop Addendum Document states additional...

  10. Energy-Aware Lossless Data Compression KENNETH C. BARR and KRSTE ASANOVI C

    E-Print Network [OSTI]

    ., 1515 Broadway, New York, NY 10036 USA, fax: +1 (212) 869-0481, or permissions@acm.org. C 2006 ACM 0734Energy-Aware Lossless Data Compression KENNETH C. BARR and KRSTE ASANOVI ´C MIT Computer Science energy than a single 32-bit computation. It can therefore be beneficial to perform additional computation

  11. Homogenous charge compression ignition engine having a cylinder including a high compression space

    DOE Patents [OSTI]

    Agama, Jorge R.; Fiveland, Scott B.; Maloney, Ronald P.; Faletti, James J.; Clarke, John M.

    2003-12-30T23:59:59.000Z

    The present invention relates generally to the field of homogeneous charge compression engines. In these engines, fuel is injected upstream or directly into the cylinder when the power piston is relatively close to its bottom dead center position. The fuel mixes with air in the cylinder as the power piston advances to create a relatively lean homogeneous mixture that preferably ignites when the power piston is relatively close to the top dead center position. However, if the ignition event occurs either earlier or later than desired, lowered performance, engine misfire, or even engine damage, can result. Thus, the present invention divides the homogeneous charge between a controlled volume higher compression space and a lower compression space to better control the start of ignition.

  12. Shock compression of precompressed deuterium

    SciTech Connect (OSTI)

    Armstrong, M R; Crowhurst, J C; Zaug, J M; Bastea, S; Goncharov, A F; Militzer, B

    2011-07-31T23:59:59.000Z

    Here we report quasi-isentropic dynamic compression and thermodynamic characterization of solid, precompressed deuterium over an ultrafast time scale (< 100 ps) and a microscopic length scale (< 1 {micro}m). We further report a fast transition in shock wave compressed solid deuterium that is consistent with the ramp to shock transition, with a time scale of less than 10 ps. These results suggest that high-density dynamic compression of hydrogen may be possible on microscopic length scales.

  13. Making Compressed Air System Decisions

    E-Print Network [OSTI]

    Porri, R. E.

    . The design of a compressed air system was formerly limited to the selection of an air compressor large enough to deliver sufficient compressed air for the estimated system requirements. As system air requirements grew, additional compressors were added... specification, selection and installation process will follow. BACKGROUND For more than 100 years compressed air has been used throughout industry as a safe and reliable utility. The generation of this utility is performed by an air compressor. The first...

  14. Worldwide Energy and Manufacturing USA Inc formerly Worldwide...

    Open Energy Info (EERE)

    USA Inc formerly Worldwide Manufacturing USA Jump to: navigation, search Name: Worldwide Energy and Manufacturing USA Inc (formerly Worldwide Manufacturing USA) Place: San Bruno,...

  15. Streaming Compression of Hexahedral Meshes

    SciTech Connect (OSTI)

    Isenburg, M; Courbet, C

    2010-02-03T23:59:59.000Z

    We describe a method for streaming compression of hexahedral meshes. Given an interleaved stream of vertices and hexahedral our coder incrementally compresses the mesh in the presented order. Our coder is extremely memory efficient when the input stream documents when vertices are referenced for the last time (i.e. when it contains topological finalization tags). Our coder then continuously releases and reuses data structures that no longer contribute to compressing the remainder of the stream. This means in practice that our coder has only a small fraction of the whole mesh in memory at any time. We can therefore compress very large meshes - even meshes that do not file in memory. Compared to traditional, non-streaming approaches that load the entire mesh and globally reorder it during compression, our algorithm trades a less compact compressed representation for significant gains in speed, memory, and I/O efficiency. For example, on the 456k hexahedra 'blade' mesh, our coder is twice as fast and uses 88 times less memory (only 3.1 MB) with the compressed file increasing about 3% in size. We also present the first scheme for predictive compression of properties associated with hexahedral cells.

  16. Application specific compression : final report.

    SciTech Connect (OSTI)

    Melgaard, David Kennett; Byrne, Raymond Harry; Myers, Daniel S.; Harrison, Carol D.; Lee, David S.; Lewis, Phillip J.; Carlson, Jeffrey J.

    2008-12-01T23:59:59.000Z

    With the continuing development of more capable data gathering sensors, comes an increased demand on the bandwidth for transmitting larger quantities of data. To help counteract that trend, a study was undertaken to determine appropriate lossy data compression strategies for minimizing their impact on target detection and characterization. The survey of current compression techniques led us to the conclusion that wavelet compression was well suited for this purpose. Wavelet analysis essentially applies a low-pass and high-pass filter to the data, converting the data into the related coefficients that maintain spatial information as well as frequency information. Wavelet compression is achieved by zeroing the coefficients that pertain to the noise in the signal, i.e. the high frequency, low amplitude portion. This approach is well suited for our goal because it reduces the noise in the signal with only minimal impact on the larger, lower frequency target signatures. The resulting coefficients can then be encoded using lossless techniques with higher compression levels because of the lower entropy and significant number of zeros. No significant signal degradation or difficulties in target characterization or detection were observed or measured when wavelet compression was applied to simulated and real data, even when over 80% of the coefficients were zeroed. While the exact level of compression will be data set dependent, for the data sets we studied, compression factors over 10 were found to be satisfactory where conventional lossless techniques achieved levels of less than 3.

  17. Data Compression with Prime Numbers

    E-Print Network [OSTI]

    Gordon Chalmers

    2005-11-16T23:59:59.000Z

    A compression algorithm is presented that uses the set of prime numbers. Sequences of numbers are correlated with the prime numbers, and labeled with the integers. The algorithm can be iterated on data sets, generating factors of doubles on the compression.

  18. Compressing bitmap indexes for faster search operations

    E-Print Network [OSTI]

    Wu, Kesheng; Otoo, Ekow J.; Shoshani, Arie

    2002-01-01T23:59:59.000Z

    study the effects of compression on bitmap indexes. The mainvalues. With- out compression, the bitmap index size wouldBBC WAH compression ratio (b) STAR bitmap indexes Figure 6.

  19. A high-resolution mapped grid algorithm for compressible multiphase flow problems

    E-Print Network [OSTI]

    Shyue, Keh-Ming

    A high-resolution mapped grid algorithm for compressible multiphase flow problems K.-M. Shyue mapped grid approach for the efficient numerical simula- tion of compressible multiphase flow in general problems, J. Comput. Phys. 142 (1998) 208-242). A standard high-resolution mapped grid method in wave

  20. Efficient Joins with Compressed Bitmap Indexes

    E-Print Network [OSTI]

    Madduri, Kamesh

    2010-01-01T23:59:59.000Z

    compression is extremely e?cient for compressing bitmap indexescompression: There are however various approaches to extend the e?ectiveness of bitmap indexes

  1. Premix charge, compression ignition combustion system optimization...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Premix charge, compression ignition combustion system optimization Premix charge, compression ignition combustion system optimization Presentation given at DEER 2006, August 20-24,...

  2. Building Commissioning in the USA 

    E-Print Network [OSTI]

    Castro, N.; Friedman, H.

    2006-01-01T23:59:59.000Z

    Building Commissioning in the USA Natascha Castro, Annex 47- US Team Leader National Institute of Standards and Technology Hannah Friedman, Cost-Benefit Subtask Leader Portland Energy Conservation, Inc. Asian Pacific Conference on Building...

  3. Advances in compressible turbulent mixing

    SciTech Connect (OSTI)

    Dannevik, W.P.; Buckingham, A.C.; Leith, C.E. [eds.

    1992-01-01T23:59:59.000Z

    This volume includes some recent additions to original material prepared for the Princeton International Workshop on the Physics of Compressible Turbulent Mixing, held in 1988. Workshop participants were asked to emphasize the physics of the compressible mixing process rather than measurement techniques or computational methods. Actual experimental results and their meaning were given precedence over discussions of new diagnostic developments. Theoretical interpretations and understanding were stressed rather than the exposition of new analytical model developments or advances in numerical procedures. By design, compressibility influences on turbulent mixing were discussed--almost exclusively--from the perspective of supersonic flow field studies. The papers are arranged in three topical categories: Foundations, Vortical Domination, and Strongly Coupled Compressibility. The Foundations category is a collection of seminal studies that connect current study in compressible turbulent mixing with compressible, high-speed turbulent flow research that almost vanished about two decades ago. A number of contributions are included on flow instability initiation, evolution, and transition between the states of unstable flow onset through those descriptive of fully developed turbulence. The Vortical Domination category includes theoretical and experimental studies of coherent structures, vortex pairing, vortex-dynamics-influenced pressure focusing. In the Strongly Coupled Compressibility category the organizers included the high-speed turbulent flow investigations in which the interaction of shock waves could be considered an important source for production of new turbulence or for the enhancement of pre-existing turbulence. Individual papers are processed separately.

  4. Best compression: Reciprocating or rotary?

    SciTech Connect (OSTI)

    Cahill, C.

    1997-07-01T23:59:59.000Z

    A compressor is a device used to increase the pressure of a compressible fluid. The inlet pressure can vary from a deep vacuum to a high positive pressure. The discharge pressure can range from subatmospheric levels to tens of thousands of pounds per square inch. Compressors come in numerous forms, but for oilfield applications there are two primary types, reciprocating and rotary. Both reciprocating and rotary compressors are grouped in the intermittent mode of compression. Intermittent is cyclic in nature, in that a specific quantity of gas is ingested by the compressor, acted upon and discharged before the cycle is repeated. Reciprocating compression is the most common form of compression used for oilfield applications. Rotary screw compressors have a long history but are relative newcomers to oilfield applications. The rotary screw compressor-technically a helical rotor compressor-dates back to 1878. That was when the first rotary screw was manufactured for the purpose of compressing air. Today thousands of rotary screw compression packages are being used throughout the world to compress natural gas.

  5. Compressed gas fuel storage system

    DOE Patents [OSTI]

    Wozniak, John J. (Columbia, MD); Tiller, Dale B. (Lincoln, NE); Wienhold, Paul D. (Baltimore, MD); Hildebrand, Richard J. (Edgemere, MD)

    2001-01-01T23:59:59.000Z

    A compressed gas vehicle fuel storage system comprised of a plurality of compressed gas pressure cells supported by shock-absorbing foam positioned within a shape-conforming container. The container is dimensioned relative to the compressed gas pressure cells whereby a radial air gap surrounds each compressed gas pressure cell. The radial air gap allows pressure-induced expansion of the pressure cells without resulting in the application of pressure to adjacent pressure cells or physical pressure to the container. The pressure cells are interconnected by a gas control assembly including a thermally activated pressure relief device, a manual safety shut-off valve, and means for connecting the fuel storage system to a vehicle power source and a refueling adapter. The gas control assembly is enclosed by a protective cover attached to the container. The system is attached to the vehicle with straps to enable the chassis to deform as intended in a high-speed collision.

  6. Compressed Air Audits using AIRMaster

    E-Print Network [OSTI]

    Wheeler, G. M.; McGill, R. D.; Bessey, E. G.; Vischer, K.

    Air compressors are a significant industrial energy user and therefore a prime target for industrial energy audits. The project goal was to develop a software tool, AIRMaster, and supporting methodology for performing compressed air system audits...

  7. A rigorous compressible streamline formulation for black oil and compositional simulation

    E-Print Network [OSTI]

    Osako, Ichiro

    2007-04-25T23:59:59.000Z

    In this study for the first time we generalize streamline models to compressible flow using a rigorous formulation while retaining most of its computational advantages. Our new formulation is based on three major elements and requires only minor...

  8. General Chair Yang Xiao, University of Alabama, USA

    E-Print Network [OSTI]

    Chen, Min

    with emerging technologies. In particular, this workshop will bring together leading researchers, industry Wei, South China University of Technology, China Gyu Myoung Lee, Institut TELECOM SudParis, France, University of Tsukuba, Japan Ilangko Balasingham, Rikshospitalet Univ.Hospital, Norway Jelena Misic

  9. A compression scheme for radio data in high performance computing

    E-Print Network [OSTI]

    Masui, Kiyoshi; Connor, Liam; Deng, Meiling; Fandino, Mateus; Höfer, Carolin; Halpern, Mark; Hanna, David; Hincks, Adam D; Hinshaw, Gary; Parra, Juan Mena; Newburgh, Laura B; Shaw, J Richard; Vanderlinde, Keith

    2015-01-01T23:59:59.000Z

    We present a procedure for efficiently compressing astronomical radio data for high performance applications. Integrated, post-correlation data are first passed through a nearly lossless rounding step which compares the precision of the data to a generalized and calibration-independent form of the radiometer equation. This allows the precision of the data to be reduced in a way that has an insignificant impact on the data. The newly developed Bitshuffle lossless compression algorithm is subsequently applied. When the algorithm is used in conjunction with the HDF5 library and data format, data produced by the CHIME Pathfinder telescope is compressed to 28% of its original size and decompression throughputs in excess of 1 GB/s are obtained on a single core.

  10. Generalized quantum secret sharing

    SciTech Connect (OSTI)

    Singh, Sudhir Kumar; Srikanth, R. [Department of Electrical Engineering, University of California, Los Angeles, California 90095 (United States); Optics Group, Raman Research Institute, Bangalore-560080 (India)

    2005-01-01T23:59:59.000Z

    We explore a generalization of quantum secret sharing (QSS) in which classical shares play a complementary role to quantum shares, exploring further consequences of an idea first studied by Nascimento, Mueller-Quade, and Imai [Phys. Rev. A 64, 042311 (2001)]. We examine three ways, termed inflation, compression, and twin thresholding, by which the proportion of classical shares can be augmented. This has the important application that it reduces quantum (information processing) players by replacing them with their classical counterparts, thereby making quantum secret sharing considerably easier and less expensive to implement in a practical setting. In compression, a QSS scheme is turned into an equivalent scheme with fewer quantum players, compensated for by suitable classical shares. In inflation, a QSS scheme is enlarged by adding only classical shares and players. In a twin-threshold scheme, we invoke two separate thresholds for classical and quantum shares based on the idea of information dilution.

  11. Compressive behavior of fine sand.

    SciTech Connect (OSTI)

    Martin, Bradley E. (Air Force Research Laboratory, Eglin, FL); Kabir, Md. E. (Purdue University, West Lafayette, IN); Song, Bo; Chen, Wayne (Purdue University, West Lafayette, IN)

    2010-04-01T23:59:59.000Z

    The compressive mechanical response of fine sand is experimentally investigated. The strain rate, initial density, stress state, and moisture level are systematically varied. A Kolsky bar was modified to obtain uniaxial and triaxial compressive response at high strain rates. A controlled loading pulse allows the specimen to acquire stress equilibrium and constant strain-rates. The results show that the compressive response of the fine sand is not sensitive to strain rate under the loading conditions in this study, but significantly dependent on the moisture content, initial density and lateral confinement. Partially saturated sand is more compliant than dry sand. Similar trends were reported in the quasi-static regime for experiments conducted at comparable specimen conditions. The sand becomes stiffer as initial density and/or confinement pressure increases. The sand particle size become smaller after hydrostatic pressure and further smaller after dynamic axial loading.

  12. USA Manufacturing: Order (2013-CE-5336)

    Broader source: Energy.gov [DOE]

    DOE ordered USA Manufacturing to pay a $8,000 civil penalty after finding USA Manufacturing had failed to certify that certain models of walk-in cooler and freezer components comply with the applicable energy conservation standards.

  13. Hisense USA: Order (2010-CE-1211)

    Broader source: Energy.gov [DOE]

    DOE issued an Order after entering into a Compromise Agreement with Hisense USA Corp. after finding Hisense USA had failed to certify that certain models of residential refrigerators, refrigerator-freezers, and freezers comply with the applicable energy conservation standards.

  14. Euro Chef USA: Order (2014-CE-23004)

    Broader source: Energy.gov [DOE]

    DOE ordered Euro Chef USA Inc. to pay a $8,000 civil penalty after finding Euro Chef USA had failed to certify that certain models of cooking products comply with the applicable energy conservation standards.

  15. Cryo-Compressed Hydrogen Storage: Performance and Cost Review...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Compressed Hydrogen Storage: Performance and Cost Review Cryo-Compressed Hydrogen Storage: Performance and Cost Review Presented at the R&D Strategies for Compressed,...

  16. Compact wavefunctions from compressed imaginary time evolution

    E-Print Network [OSTI]

    Jarrod R. McClean; Alán Aspuru-Guzik

    2014-09-25T23:59:59.000Z

    Simulation of quantum systems promises to deliver physical and chemical predictions for the frontiers of technology. Unfortunately, the exact representation of these systems is plagued by the exponential growth of dimension with the number of particles, or colloquially, the curse of dimensionality. The success of approximation methods has hinged on the relative simplicity of physical systems with respect to the exponentially complex worst case. Exploiting this relative simplicity has required detailed knowledge of the physical system under study. In this work, we introduce a general and efficient black box method for many-body quantum systems that utilizes technology from compressed sensing to find the most compact wavefunction possible without detailed knowledge of the system. It is a Multicomponent Adaptive Greedy Iterative Compression (MAGIC) scheme. No knowledge is assumed in the structure of the problem other than correct particle statistics. This method can be applied to many quantum systems such as spins, qubits, oscillators, or electronic systems. As an application, we use this technique to compute ground state electronic wavefunctions of hydrogen fluoride and recover 98% of the basis set correlation energy or equivalently 99.996% of the total energy with $50$ configurations out of a possible $10^7$. Building from this compactness, we introduce the idea of nuclear union configuration interaction for improving the description of reaction coordinates and use it to study the dissociation of hydrogen fluoride and the helium dimer.

  17. About Total Lubricants USA, Inc. Headquartered in Linden, New Jersey, Total Lubricants USA provides

    E-Print Network [OSTI]

    Fisher, Kathleen

    New Jersey, Total Lubricants USA provides advanced quality industrial lubrication productsAbout Total Lubricants USA, Inc. Headquartered in Linden, New Jersey, Total Lubricants USA provides. A subsidiary of Total, S.A., the world's fourth largest oil company, Total Lubricants USA still fosters its

  18. Progressive Compression of Volumetric Subdivision Meshes

    SciTech Connect (OSTI)

    Laney, D; Pascucci, V

    2004-04-16T23:59:59.000Z

    We present a progressive compression technique for volumetric subdivision meshes based on the slow growing refinement algorithm. The system is comprised of a wavelet transform followed by a progressive encoding of the resulting wavelet coefficients. We compare the efficiency of two wavelet transforms. The first transform is based on the smoothing rules used in the slow growing subdivision technique. The second transform is a generalization of lifted linear B-spline wavelets to the same multi-tier refinement structure. Direct coupling with a hierarchical coder produces progressive bit streams. Rate distortion metrics are evaluated for both wavelet transforms. We tested the practical performance of the scheme on synthetic data as well as data from laser indirect-drive fusion simulations with multiple fields per vertex. Both wavelet transforms result in high quality trade off curves and produce qualitatively good coarse representations.

  19. Advanced Management of Compressed Air Systems

    Office of Energy Efficiency and Renewable Energy (EERE)

    Find out how a compressed air system works and the benefits of optimal compressed air system performance. This training is designed to help end users as well as industry solution providers learn...

  20. Image Compression by Back Propagation

    E-Print Network [OSTI]

    Cottrell, Garrison W.

    CHAPTER 9 Image Compression by Back Propagation: An Example of Extensional Programming* GARRISON W the case with the computatiolls associated with basic cognitive pro- cesses such as vision and audition techniques. The technique we employ is known as back propagation. developed by l1umelhart, Hinton

  1. Building Commissioning in the USA

    E-Print Network [OSTI]

    Castro, N.; Friedman, H.

    2006-01-01T23:59:59.000Z

    Building Commissioning in the USA Natascha Castro, Annex 47- US Team Leader National Institute of Standards and Technology Hannah Friedman, Cost-Benefit Subtask Leader Portland Energy Conservation, Inc. Asian Pacific Conference on Building... Program (PIER)? Utility programs and non-profit organizations ? Energy Efficiency Mandates ? California, New York, Vermont, Minnesota, City of Portland Oregon ? Building Energy Codes include Cx ? California, State of Washington, Massachusetts US Team...

  2. Compression of cooked freeze-dried carrots

    E-Print Network [OSTI]

    Macphearson, Bruce Alan

    1973-01-01T23:59:59.000Z

    to precompression characteristics (Brockmann, 1966). Hsmdy (1962) found that acceptable, compressed and freeze-dried spinach could be obtained by plasticizing the product to a moisture content of 9X before compression. Ishler (1962) reported that spraying... the dehydrated food before compression with either water, glycerine or propylene glycol produced bars with excellent rehydra- tion characteristics. He recommended spraying freeze-dried cellu- lar foods to 5-13X moisture, compressing, and redrying to lees than...

  3. Compressibility and strength of nanocrystalline tungsten boride under compression to 60GPa

    E-Print Network [OSTI]

    Duffy, Thomas S.

    Compressibility and strength of nanocrystalline tungsten boride under compression to 60GPa Haini://jap.aip.org/about/rights_and_permissions #12;Compressibility and strength of nanocrystalline tungsten boride under compression to 60 GPa Haini of nanocrystalline tungsten boride (WB) were investigated using radial x-ray diffraction (RXRD) in a diamond

  4. ADVANCED RECIPROCATING COMPRESSION TECHNOLOGY (ARCT)

    SciTech Connect (OSTI)

    Danny M. Deffenbaugh; Klaus Brun; Ralph E. Harris; J. Pete Harrell; Robert J. Mckee; J. Jeffrey Moore; Steven J. Svedeman; Anthony J. Smalley; Eugene L. Broerman; Robert A Hart; Marybeth G. Nored; Ryan S. Gernentz; Shane P. Siebenaler

    2005-12-01T23:59:59.000Z

    The U.S. natural gas pipeline industry is facing the twin challenges of increased flexibility and capacity expansion. To meet these challenges, the industry requires improved choices in gas compression to address new construction and enhancement of the currently installed infrastructure. The current fleet of installed reciprocating compression is primarily slow-speed integral machines. Most new reciprocating compression is and will be large, high-speed separable units. The major challenges with the fleet of slow-speed integral machines are: limited flexibility and a large range in performance. In an attempt to increase flexibility, many operators are choosing to single-act cylinders, which are causing reduced reliability and integrity. While the best performing units in the fleet exhibit thermal efficiencies between 90% and 92%, the low performers are running down to 50% with the mean at about 80%. The major cause for this large disparity is due to installation losses in the pulsation control system. In the better performers, the losses are about evenly split between installation losses and valve losses. The major challenges for high-speed machines are: cylinder nozzle pulsations, mechanical vibrations due to cylinder stretch, short valve life, and low thermal performance. To shift nozzle pulsation to higher orders, nozzles are shortened, and to dampen the amplitudes, orifices are added. The shortened nozzles result in mechanical coupling with the cylinder, thereby, causing increased vibration due to the cylinder stretch mode. Valve life is even shorter than for slow speeds and can be on the order of a few months. The thermal efficiency is 10% to 15% lower than slow-speed equipment with the best performance in the 75% to 80% range. The goal of this advanced reciprocating compression program is to develop the technology for both high speed and low speed compression that will expand unit flexibility, increase thermal efficiency, and increase reliability and integrity. Retrofit technologies that address the challenges of slow-speed integral compression are: (1) optimum turndown using a combination of speed and clearance with single-acting operation as a last resort; (2) if single-acting is required, implement infinite length nozzles to address nozzle pulsation and tunable side branch absorbers for 1x lateral pulsations; and (3) advanced valves, either the semi-active plate valve or the passive rotary valve, to extend valve life to three years with half the pressure drop. This next generation of slow-speed compression should attain 95% efficiency, a three-year valve life, and expanded turndown. New equipment technologies that address the challenges of large-horsepower, high-speed compression are: (1) optimum turndown with unit speed; (2) tapered nozzles to effectively reduce nozzle pulsation with half the pressure drop and minimization of mechanical cylinder stretch induced vibrations; (3) tunable side branch absorber or higher-order filter bottle to address lateral piping pulsations over the entire extended speed range with minimal pressure drop; and (4) semi-active plate valves or passive rotary valves to extend valve life with half the pressure drop. This next generation of large-horsepower, high-speed compression should attain 90% efficiency, a two-year valve life, 50% turndown, and less than 0.75 IPS vibration. This program has generated proof-of-concept technologies with the potential to meet these ambitious goals. Full development of these identified technologies is underway. The GMRC has committed to pursue the most promising enabling technologies for their industry.

  5. Chapter 22: Compressed Air Evaluation Protocol

    SciTech Connect (OSTI)

    Benton, N.

    2014-11-01T23:59:59.000Z

    Compressed-air systems are used widely throughout industry for many operations, including pneumatic tools, packaging and automation equipment, conveyors, and other industrial process operations. Compressed-air systems are defined as a group of subsystems composed of air compressors, air treatment equipment, controls, piping, pneumatic tools, pneumatically powered machinery, and process applications using compressed air. A compressed-air system has three primary functional subsystems: supply, distribution, and demand. Air compressors are the primary energy consumers in a compressed-air system and are the primary focus of this protocol. The two compressed-air energy efficiency measures specifically addressed in this protocol are: high-efficiency/variable speed drive (VSD) compressor replacing modulating compressor; compressed-air leak survey and repairs. This protocol provides direction on how to reliably verify savings from these two measures using a consistent approach for each.

  6. Compressed air energy storage system

    DOE Patents [OSTI]

    Ahrens, Frederick W. (Naperville, IL); Kartsounes, George T. (Naperville, IL)

    1981-01-01T23:59:59.000Z

    An internal combustion reciprocating engine is operable as a compressor during slack demand periods utilizing excess power from a power grid to charge air into an air storage reservoir and as an expander during peak demand periods to feed power into the power grid utilizing air obtained from the air storage reservoir together with combustible fuel. Preferably the internal combustion reciprocating engine is operated at high pressure and a low pressure turbine and compressor are also employed for air compression and power generation.

  7. Vestas USA | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTown of Ladoga,planningFlowmeter Logging Jump to: navigation,Vestas USA Place:

  8. FUJIFILM Hunt Chemicals U.S.A. Achieves Compressed Air System

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube|6721 FederalTexasManager6-OPAMGuiding Documents FTCPEnergy-Reduction Goals with

  9. An Efficient Technique for Text Compression

    E-Print Network [OSTI]

    Azad, Md Abul Kalam; Ahmad, Shabbir; Kamruzzaman, S M

    2010-01-01T23:59:59.000Z

    For storing a word or the whole text segment, we need a huge storage space. Typically a character requires 1 Byte for storing it in memory. Compression of the memory is very important for data management. In case of memory requirement compression for text data, lossless memory compression is needed. We are suggesting a lossless memory requirement compression method for text data compression. The proposed compression method will compress the text segment or the text file based on two level approaches firstly reduction and secondly compression. Reduction will be done using a word lookup table not using traditional indexing system, then compression will be done using currently available compression methods. The word lookup table will be a part of the operating system and the reduction will be done by the operating system. According to this method each word will be replaced by an address value. This method can quite effectively reduce the size of persistent memory required for text data. At the end of the first l...

  10. Evolution of some Los Alamos flux compression programs

    SciTech Connect (OSTI)

    Fowler, C.M.; Goforth, J.H.

    1996-12-31T23:59:59.000Z

    When we were approached to give a general discussion of some aspects of the Los Alamos flux compression program, we decided to present historical backgrounds of a few topics that have some relevance to programs that we very much In the forefront of activities going on today. Of some thirty abstracts collected at Los Alamos for this conference, ten of them dealt with electromagnetic acceleration of materials, notably the compression of heavy liners, and five dealt with plasma compression. Both of these topics have been under investigation, off and on, from the time a formal flux compression program was organized at Los Alamos. We decided that a short overview of work done In these areas would be of some interest. Some of the work described below has been discussed in Laboratory reports that, while referenced and available, are not readily accessible. For completeness, some previously published, accessible work Is also discussed but much more briefly. Perhaps the most striking thing about the early work In these two areas is how primitive much of it was when compared to the far more sophisticated, related activities of today. Another feature of these programs, actually for most programs, Is their cyclic nature. Their relevance and/or funding seems to come land go. Eventually, many of the older programs come back into favor. Activities Involving the dense plasma focus (DPF), about which some discussions will be given later, furnish a classic example of this kind, coming Into and then out of periods of heightened interest. We devote the next two sections of this paper to a review of our work In magnetic acceleration of solids and of plasma compression. A final section gives a survey of our work In which thin foils are imploded to produce intense quantities of son x-rays. The authors are well aware of much excellent work done elsewhere In all of these topics, but partly because of space limitations, have confined this discussion to work done at Los Alamos.

  11. Envera Variable Compression Ratio Engine

    SciTech Connect (OSTI)

    Charles Mendler

    2011-03-15T23:59:59.000Z

    Aggressive engine downsizing, variable compression ratio and use of the Atkinson cycle are being combined to improve fuel economy by up to 40 percent relative to port fuel injected gasoline engines, while maintaining full engine power. Approach Engine downsizing is viewed by US and foreign automobile manufacturers as one of the best options for improving fuel economy. While this strategy has already demonstrated a degree of success, downsizing and fuel economy gains are currently limited. With new variable compression ratio technology however, the degree of engine downsizing and fuel economy improvement can be greatly increased. A small variable compression ratio (VCR) engine has the potential to return significantly higher vehicle fuel economy while also providing high power. Affordability and potential for near term commercialization are key attributes of the Envera VCR engine. VCR Technology To meet torque and power requirements, a smaller engine needs to do more work per stroke. This is typically accomplished by boosting the incoming charge with either a turbo or supercharger so that more energy is present in the cylinder per stroke to do the work. With current production engines the degree of engine boosting (which correlates to downsizing) is limited by detonation (combustion knock) at high boost levels. Additionally, the turbo or supercharger needs to be responsive and efficient while providing the needed boost. VCR technology eliminates the limitation of engine knock at high load levels by reducing compression ratio to {approx}9:1 (or whatever level is appropriate) when high boost pressures are needed. By reducing the compression ratio during high load demand periods there is increased volume in the cylinder at top dead center (TDC) which allows more charge (or energy) to be present in the cylinder without increasing the peak pressure. Cylinder pressure is thus kept below the level at which the engine would begin to knock. When loads on the engine are low the compression ratio can be raised (to as much as 18:1) providing high engine efficiency. It is important to recognize that for a well designed VCR engine cylinder pressure does not need to be higher than found in current production turbocharged engines. As such, there is no need for a stronger crankcase, bearings and other load bearing parts within the VCR engine. The Envera VCR mechanism uses an eccentric carrier approach to adjust engine compression ratio. The crankshaft main bearings are mounted in this eccentric carrier or 'crankshaft cradle' and pivoting the eccentric carrier 30 degrees adjusts compression ratio from 9:1 to 18:1. The eccentric carrier is made up of a casting that provides rigid support for the main bearings, and removable upper bearing caps. Oil feed to the main bearings transits through the bearing cap fastener sockets. The eccentric carrier design was chosen for its low cost and rigid support of the main bearings. A control shaft and connecting links are used to pivot the eccentric carrier. The control shaft mechanism features compression ratio lock-up at minimum and maximum compression ratio settings. The control shaft method of pivoting the eccentric carrier was selected due to its lock-up capability. The control shaft can be rotated by a hydraulic actuator or an electric motor. The engine shown in Figures 3 and 4 has a hydraulic actuator that was developed under the current program. In-line 4-cylinder engines are significantly less expensive than V engines because an entire cylinder head can be eliminated. The cost savings from eliminating cylinders and an entire cylinder head will notably offset the added cost of the VCR and supercharging. Replacing V6 and V8 engines with in-line VCR 4-cylinder engines will provide high fuel economy at low cost. Numerous enabling technologies exist which have the potential to increase engine efficiency. The greatest efficiency gains are realized when the right combination of advanced and new technologies are packaged together to provide the greatest gains at the least cost. Aggressive engine downsiz

  12. Industrial Compressed Air System Energy Efficiency Guidebook.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    1993-12-01T23:59:59.000Z

    Energy efficient design, operation and maintenance of compressed air systems in industrial plants can provide substantial reductions in electric power and other operational costs. This guidebook will help identify cost effective, energy efficiency opportunities in compressed air system design, re-design, operation and maintenance. The guidebook provides: (1) a broad overview of industrial compressed air systems, (2) methods for estimating compressed air consumption and projected air savings, (3) a description of applicable, generic energy conservation measures, and, (4) a review of some compressed air system demonstration projects that have taken place over the last two years. The primary audience for this guidebook includes plant maintenance supervisors, plant engineers, plant managers and others interested in energy management of industrial compressed air systems.

  13. Eccentric crank variable compression ratio mechanism

    DOE Patents [OSTI]

    Lawrence, Keith Edward (Kobe, JP); Moser, William Elliott (Peoria, IL); Roozenboom, Stephan Donald (Washington, IL); Knox, Kevin Jay (Peoria, IL)

    2008-05-13T23:59:59.000Z

    A variable compression ratio mechanism for an internal combustion engine that has an engine block and a crankshaft is disclosed. The variable compression ratio mechanism has a plurality of eccentric disks configured to support the crankshaft. Each of the plurality of eccentric disks has at least one cylindrical portion annularly surrounded by the engine block. The variable compression ratio mechanism also has at least one actuator configured to rotate the plurality of eccentric disks.

  14. Compressed Air Energy Storage Act (Kansas)

    Broader source: Energy.gov [DOE]

    This act lays out regulations for the local authorities related to site selection, design, operation and monitoring for underground storage of compressed air.

  15. CULTURAL RATCHETING RESULTS PRIMARILY FROM SEMANTIC COMPRESSION

    E-Print Network [OSTI]

    Bryson, Joanna J.

    CULTURAL RATCHETING RESULTS PRIMARILY FROM SEMANTIC COMPRESSION JOANNA J. BRYSON Artificial Models that cultural ratcheting requires the communication of beliefs about #12;hypotheses. Clearly, cultural

  16. High Efficiency Fuel Reactivity Controlled Compression Ignition...

    Broader source: Energy.gov (indexed) [DOE]

    & Publications Effect of Compression Ratio and Piston Geometry on RCCI load limit Optimization of Advanced Diesel Engine Combustion Strategies Vehicle Technologies Office Merit...

  17. Optimization Online - Compressed Sensing Off the Grid

    E-Print Network [OSTI]

    Gongguo Tang

    2012-09-13T23:59:59.000Z

    Sep 13, 2012 ... Compressed Sensing Off the Grid. Gongguo Tang(gtang5 ***at*** wisc.edu) Badri Narayan Bhaskar(bnbhaskar ***at*** wisc.edu) Parikshit ...

  18. Demonstration/Development of Reactivity Controlled Compression...

    Broader source: Energy.gov (indexed) [DOE]

    DemonstrationDevelopment of Reactivity Controlled Compression Ignition (RCCI) Combustion for High Efficiency, Low Emissions Vehicle Applications Dr. Rolf Reitz Wisconsin Engine...

  19. 1Mohammed Atiquzzaman, University of Oklahoma, USA.

    E-Print Network [OSTI]

    Atiquzzaman, Mohammed

    1Mohammed Atiquzzaman, University of Oklahoma, USA. Presentation at Tohoku University, Japan Aug 6 of Computer Science University of Oklahoma. Email: atiq@ieee.org Web: www.cs.ou.edu/~atiq Tohoku University, Sendai, Japan. Aug 6, 2002. #12;2Mohammed Atiquzzaman, University of Oklahoma, USA. Presentation

  20. 1Mohammed Atiquzzaman, University of Oklahoma, USA.

    E-Print Network [OSTI]

    Atiquzzaman, Mohammed

    1Mohammed Atiquzzaman, University of Oklahoma, USA. Presentation at Tohoku University, Japan Aug 6 of Computer Science University of Oklahoma. Email: atiq@ieee.org Web: www.cs.ou.edu/~atiq Presentation at Tohoku University, Sendai, Japan. Aug 6, 2002. #12;2Mohammed Atiquzzaman, University of Oklahoma, USA

  1. Digital Compressive Quantitation and Hyperspectral Imaging

    E-Print Network [OSTI]

    2013-07-25T23:59:59.000Z

    cPurdue University, Department of Computer Science, West Lafayette, IN, USA .... through so ware available from Texas Instruments (Load ... (middle panel).

  2. A New Approach for Fingerprint Image Compression

    SciTech Connect (OSTI)

    Mazieres, Bertrand

    1997-12-01T23:59:59.000Z

    The FBI has been collecting fingerprint cards since 1924 and now has over 200 million of them. Digitized with 8 bits of grayscale resolution at 500 dots per inch, it means 2000 terabytes of information. Also, without any compression, transmitting a 10 Mb card over a 9600 baud connection will need 3 hours. Hence we need a compression and a compression as close to lossless as possible: all fingerprint details must be kept. A lossless compression usually do not give a better compression ratio than 2:1, which is not sufficient. Compressing these images with the JPEG standard leads to artefacts which appear even at low compression rates. Therefore the FBI has chosen in 1993 a scheme of compression based on a wavelet transform, followed by a scalar quantization and an entropy coding : the so-called WSQ. This scheme allows to achieve compression ratios of 20:1 without any perceptible loss of quality. The publication of the FBI specifies a decoder, which means that many parameters can be changed in the encoding process: the type of analysis/reconstruction filters, the way the bit allocation is made, the number of Huffman tables used for the entropy coding. The first encoder used 9/7 filters for the wavelet transform and did the bit allocation using a high-rate bit assumption. Since the transform is made into 64 subbands, quite a lot of bands receive only a few bits even at an archival quality compression rate of 0.75 bit/pixel. Thus, after a brief overview of the standard, we will discuss a new approach for the bit-allocation that seems to make more sense where theory is concerned. Then we will talk about some implementation aspects, particularly for the new entropy coder and the features that allow other applications than fingerprint image compression. Finally, we will compare the performances of the new encoder to those of the first encoder.

  3. Upcoming H2USA Workshop: Hydrogen Fueling Station Component Listings...

    Office of Environmental Management (EM)

    H2USA Workshop: Hydrogen Fueling Station Component Listings Upcoming H2USA Workshop: Hydrogen Fueling Station Component Listings April 21, 2015 - 1:04pm Addthis H2USA will host an...

  4. Defect Analysis of Vehicle Compressed Natural Gas

    E-Print Network [OSTI]

    Defect Analysis of Vehicle Compressed Natural Gas Composite Cylinder A China Paper on Type 4;Industrial Computed Tomography (CT) Examination of Composite Gas Cylinder #12;CT of 01-01 Layer at 4.8MPa during the gas compressing and releasing processes are the direct causes for liner defect - Since

  5. The Spatial Scaling Laws of Compressible Turbulence

    E-Print Network [OSTI]

    Sun, Bohua

    2015-01-01T23:59:59.000Z

    This Letter proposed spatial scaling laws of the density-weighted energy spectrum of compressible flow in terms of dissipation rate, wave number and the Mach number. The study has shown the compressible turbulence energy spectrum does not show the complete similarity, but incomplete similarity as $E(k,Ma)=(C+\\frac{D}{\\ln{Ma}})\

  6. Compressible fluid model for hydrodynamic lubrication cavitation

    E-Print Network [OSTI]

    Sart, Remi

    Compressible fluid model for hydrodynamic lubrication cavitation G. Bayada L. Chupin I.C.J. UMR.chupin@math.univ-bpclermont.fr Keywords: cavitation, compressible Reynolds equation Date: april 2013 Summary In this paper, it is shown how vaporous cavitation in lubricant films can be modelled in a physically justified manner through

  7. area nevada usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Position Description Internship Program Goal: Bell Nursery USA, LLC - is a wholesale grower of quality bedding plants, pot. Intern Project: 12;Bell Nursery USA, LLC The...

  8. USA Science and Engineering Festival: Inspiring and Educating...

    Energy Savers [EERE]

    USA Science and Engineering Festival: Inspiring and Educating the Clean Energy Workforce of Tomorrow USA Science and Engineering Festival: Inspiring and Educating the Clean Energy...

  9. MOU signed between CIAE and Jefferson National Lab, USA. (China...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    https:www.jlab.orgnewsarticlesmou-signed-between-ciae-and-jefferson-national-lab-usa-china-nuclear-industry-news-ge... MOU signed between CIAE and Jefferson National Lab, USA....

  10. alexandria virginia usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Now at University of Wisconsin, USA. Permanent address: Northeastern University, Department of Physics, Boston, 02115 MA, USA. Now at NIKHEF P.O.B. 41882 Dutz, Hartmut 8...

  11. Revealing the potential of Compressed Earth Blocks : a visual narration

    E-Print Network [OSTI]

    Rabie, Omar

    2008-01-01T23:59:59.000Z

    Compressed Earth Blocks (CEB) is a developed earth technology, in which unbaked brick is produced by compressing raw soil using manual, hydraulic, or mechanical compressing machines. Revealing the potential of an affordable ...

  12. Wavelet compression for unsteady CFD data Oxford University Computing Laboratory

    E-Print Network [OSTI]

    Giles, Mike

    in compressing the periodic data arising from 3D stator/rotor and utter applications. 1 #12;1 Fourier compression compression can only be performed as a post-processing step. Also, the reconstruction at a particular instant

  13. Compressed bitmap indices for efficient query processing

    SciTech Connect (OSTI)

    Wu, Kesheng; Otoo, Ekow; Shoshani, Arie

    2001-09-30T23:59:59.000Z

    Many database applications make extensive use of bitmap indexing schemes. In this paper, we study how to improve the efficiencies of these indexing schemes by proposing new compression schemes for the bitmaps. Most compression schemes are designed primarily to achieve good compression. During query processing they can be orders of magnitude slower than their uncompressed counterparts. The new schemes are designed to bridge this performance gap by reducing compression effectiveness and improving operation speed. In a number of tests on both synthetic data and real application data, we found that the new schemes significantly outperform the well-known compression schemes while using only modestly more space. For example, compared to the Byte-aligned Bitmap Code, the new schemes are 12 times faster and it uses only 50 percent more space. The new schemes use much less space(<30 percent) than the uncompressed scheme and are faster in a majority of the test cases.

  14. Secure Compressed Reading in Smart Grids

    E-Print Network [OSTI]

    Cai, Sheng; Chen, Minghua; Yan, Jianxin; Jaggi, Sidharth

    2012-01-01T23:59:59.000Z

    Smart Grids measure energy usage in real-time and tailor supply and delivery accordingly, in order to improve power transmission and distribution. For the grids to operate effectively, it is critical to collect readings from massively-installed smart meters to control centers in an efficient and secure manner. In this paper, we propose a secure compressed reading scheme to address this critical issue. We observe that our collected real-world meter data express strong temporal correlations, indicating they are sparse in certain domains. We adopt Compressed Sensing technique to exploit this sparsity and design an efficient meter data transmission scheme. Our scheme achieves substantial efficiency offered by compressed sensing, without the need to know beforehand in which domain the meter data are sparse. This is in contrast to traditional compressed-sensing based scheme where such sparse-domain information is required a priori. We then design specific dependable scheme to work with our compressed sensing based ...

  15. Quantum Data Compression of a Qubit Ensemble

    E-Print Network [OSTI]

    Lee A. Rozema; Dylan H. Mahler; Alex Hayat; Peter S. Turner; Aephraim M. Steinberg

    2014-10-15T23:59:59.000Z

    Data compression is a ubiquitous aspect of modern information technology, and the advent of quantum information raises the question of what types of compression are feasible for quantum data, where it is especially relevant given the extreme difficulty involved in creating reliable quantum memories. We present a protocol in which an ensemble of quantum bits (qubits) can in principle be perfectly compressed into exponentially fewer qubits. We then experimentally implement our algorithm, compressing three photonic qubits into two. This protocol sheds light on the subtle differences between quantum and classical information. Furthermore, since data compression stores all of the available information about the quantum state in fewer physical qubits, it could provide a vast reduction in the amount of quantum memory required to store a quantum ensemble, making even today's limited quantum memories far more powerful than previously recognized.

  16. Compression molding of aerogel microspheres

    DOE Patents [OSTI]

    Pekala, R.W.; Hrubesh, L.W.

    1998-03-24T23:59:59.000Z

    An aerogel composite material produced by compression molding of aerogel microspheres (powders) mixed together with a small percentage of polymer binder to form monolithic shapes in a cost-effective manner is disclosed. The aerogel composites are formed by mixing aerogel microspheres with a polymer binder, placing the mixture in a mold and heating under pressure, which results in a composite with a density of 50--800 kg/m{sup 3} (0.05--0.80 g/cc). The thermal conductivity of the thus formed aerogel composite is below that of air, but higher than the thermal conductivity of monolithic aerogels. The resulting aerogel composites are attractive for applications such as thermal insulation since fabrication thereof does not require large and expensive processing equipment. In addition to thermal insulation, the aerogel composites may be utilized for filtration, ICF target, double layer capacitors, and capacitive deionization. 4 figs.

  17. Compression molding of aerogel microspheres

    DOE Patents [OSTI]

    Pekala, Richard W. (Pleasant Hill, CA); Hrubesh, Lawrence W. (Pleasanton, CA)

    1998-03-24T23:59:59.000Z

    An aerogel composite material produced by compression molding of aerogel microspheres (powders) mixed together with a small percentage of polymer binder to form monolithic shapes in a cost-effective manner. The aerogel composites are formed by mixing aerogel microspheres with a polymer binder, placing the mixture in a mold and heating under pressure, which results in a composite with a density of 50-800 kg/m.sup.3 (0.05-0.80 g/cc). The thermal conductivity of the thus formed aerogel composite is below that of air, but higher than the thermal conductivity of monolithic aerogels. The resulting aerogel composites are attractive for applications such as thermal insulation since fabrication thereof does not require large and expensive processing equipment. In addition to thermal insulation, the aerogel composites may be utilized for filtration, ICF target, double layer capacitors, and capacitive deionization.

  18. Fact Sheet: Isothermal Compressed Air Energy Storage (October...

    Broader source: Energy.gov (indexed) [DOE]

    SustainX American Recovery and Reinvestment Act (ARRA) Isothermal Compressed Air Energy Storage Demonstrating a modular, market-ready energy storage system that uses compressed air...

  19. High-Efficiency Clean Combustion Engine Designs for Compression...

    Energy Savers [EERE]

    High-Efficiency Clean Combustion Engine Designs for Compression Ignition Engines High-Efficiency Clean Combustion Engine Designs for Compression Ignition Engines Presentation from...

  20. Advancement in Fuel Spray and Combustion Modeling for Compression...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Advancement in Fuel Spray and Combustion Modeling for Compression Ignition Engine Applications Advancement in Fuel Spray and Combustion Modeling for Compression Ignition Engine...

  1. High-Efficiency Clean Combustion Design for Compression Ignition...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    High-Efficiency Clean Combustion Design for Compression Ignition Engines High-Efficiency Clean Combustion Design for Compression Ignition Engines Presentation given at DEER 2006,...

  2. Graphene physics and insulator-metal transition in compressed...

    Office of Scientific and Technical Information (OSTI)

    Graphene physics and insulator-metal transition in compressed hydrogen Citation Details Title: Graphene physics and insulator-metal transition in compressed hydrogen Authors:...

  3. Advanced CFD Models for High Efficiency Compression Ignition...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    CFD Models for High Efficiency Compression Ignition Engines Advanced CFD Models for High Efficiency Compression Ignition Engines Advanced CFD models for high efficiency...

  4. New Methodologies for Analysis of Premixed Charge Compression...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    New Methodologies for Analysis of Premixed Charge Compression Ignition Engines New Methodologies for Analysis of Premixed Charge Compression Ignition Engines Presentation given at...

  5. High Fidelity Modeling of Premixed Charge Compression Ignition...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Fidelity Modeling of Premixed Charge Compression Ignition Engines High Fidelity Modeling of Premixed Charge Compression Ignition Engines Most accurate and detailed chemical kinetic...

  6. Characterization of Dual-Fuel Reactivity Controlled Compression...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Dual-Fuel Reactivity Controlled Compression Ignition (RCCI) Using Hydrated Ethanol and Diesel Fuel Characterization of Dual-Fuel Reactivity Controlled Compression Ignition (RCCI)...

  7. Regulated Emissions from Diesel and Compressed Natural Gas Transit...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Emissions from Diesel and Compressed Natural Gas Transit Buses Regulated Emissions from Diesel and Compressed Natural Gas Transit Buses Poster presentaiton at the 2007 Diesel...

  8. Open Issues in the Development of Safety Standards for Compressed...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Issues in the Development of Safety Standards for Compressed Hydrogen Storage at SAE-International Open Issues in the Development of Safety Standards for Compressed Hydrogen...

  9. Research and Development Strategies for Compressed & Cryo-Hydrogen...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Strategies for Compressed & Cryo-Hydrogen Storage Systems - Workshop Summary Report Research and Development Strategies for Compressed & Cryo-Hydrogen Storage Systems - Workshop...

  10. 2013 Hydrogen Compression, Storage, and Dispensing Cost Reduction...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop Final Report 2013 Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop Final Report...

  11. Evaluation of the Compressed Air Challenge Training Program:...

    Broader source: Energy.gov (indexed) [DOE]

    Executive Summary Evaluation of the Compressed Air Challenge Training Program: Executive Summary This is the executive summary of a report on an evaluation of the Compressed Air...

  12. Evaluation of the Compressed Air Challenge Training Program:...

    Broader source: Energy.gov (indexed) [DOE]

    Final Report Evaluation of the Compressed Air Challenge Training Program: Final Report This is the final report on an evaluation of the Compressed Air Challenge (CAC) training...

  13. Effect of Premixed Charge Compression Ignition on Vehicle Fuel...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Premixed Charge Compression Ignition on Vehicle Fuel Economy and Emissions Reduction over Transient Driving Cycles Effect of Premixed Charge Compression Ignition on Vehicle Fuel...

  14. DOE Announces Webinars on Compressed Natural Gas Infrastructure...

    Energy Savers [EERE]

    Compressed Natural Gas Infrastructure, an Advanced Rooftop Unit Campaign, and More DOE Announces Webinars on Compressed Natural Gas Infrastructure, an Advanced Rooftop Unit...

  15. NJ Compressed Natural Gas Refuse Trucks, Shuttle Buses and Infrastruct...

    Broader source: Energy.gov (indexed) [DOE]

    Documents & Publications CX-005345: Categorical Exclusion Determination NJ Compressed Natural Gas Refuse Trucks, Shuttle Buses and Infrastructure Business Case for Compressed...

  16. Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons Learned for the Safe Deployment of Vehicles Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons Learned...

  17. Vehicle Technologies Office Merit Review 2014: High Compression...

    Broader source: Energy.gov (indexed) [DOE]

    High Compression Ratio Turbo Gasoline Engine Operation Using Alcohol Enhancement Vehicle Technologies Office Merit Review 2014: High Compression Ratio Turbo Gasoline Engine...

  18. H2A Delivery: Forecourt Compression & Storage Optimization (Part...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    H2A Delivery: Forecourt Compression & Storage Optimization (Part II) H2A Delivery: Forecourt Compression & Storage Optimization (Part II) Presentation by Matthew Hooks of TIAX at...

  19. H2A Delivery: Forecourt Compression & Storage Optimization (Part...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    H2A Delivery: H2A Delivery: Forecourt Compression & Forecourt Compression & Storage Optimization (Part II) Storage Optimization (Part II) Hydrogen Delivery Analysis Meeting May...

  20. Technical Assessment of Cryo-Compressed Hydrogen Storage Tank...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Cryo-Compressed Hydrogen Storage Tank Systems for Automotive Applications Technical Assessment of Cryo-Compressed Hydrogen Storage Tank Systems for Automotive Applications...

  1. Technical Assessment of Compressed Hydrogen Storage Tank Systems...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Compressed Hydrogen Storage Tank Systems for Automotive Applications Technical Assessment of Compressed Hydrogen Storage Tank Systems for Automotive Applications Technical report...

  2. Pdc - The Worldwide Leader in Hydrogen Refueling Station Compression...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Pdc - The Worldwide Leader in Hydrogen Refueling Station Compression Pdc - The Worldwide Leader in Hydrogen Refueling Station Compression This presentation by Matther Weaver of Pdc...

  3. USA oilgas production cost : recent changes

    E-Print Network [OSTI]

    Adelman, Morris Albert

    1991-01-01T23:59:59.000Z

    During 1984-1989, oil development investment cost in the USA fell, but only because of lower activity. The whole cost curve shifted unfavorably (leftward). In contrast, natural gas cost substantially decreased, the curve ...

  4. USA Manufacturing: Proposed Penalty (2013-CE-5336)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that USA Manufacturing failed to certify walk-in cooler or freezer components as compliant with the energy conservation standards.

  5. Hisense USA: Proposed Penalty (2010-CE-1211)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Hisense USA Corp. failed to certify a variety of residential refrigerators, refrigerator-freezers, and freezers as compliant with the applicable energy conservation standards.

  6. Bell Nursery USA, LLC Internship Position Description

    E-Print Network [OSTI]

    Bell Nursery USA, LLC Internship Position Description Internship Program Goal as a grower. Grower/Internship position : It is our goal at Bell to provide a rewarding and educational experience to the student/intern. The internship position

  7. A wave propagation method for compressible multiphase flow on mapped grids

    E-Print Network [OSTI]

    Shyue, Keh-Ming

    A wave propagation method for compressible multiphase flow on mapped grids K.-M. Shyue Department with a stiffened gas equation of state on body-fitted mapped grids in general two- and three-dimensional geometries, Body-fitted mapped grids, Wave propagation method, Stiffened gas equation of state 2000 MSC: 65M06, 65M

  8. D.D. Luong et al. / Journal of Alloys and Compounds 550 (2013) 412422 412 Development of high performance lightweight aluminum alloy/SiC hollow sphere syntactic foams and compressive

    E-Print Network [OSTI]

    Gupta, Nikhil

    2013-01-01T23:59:59.000Z

    performance lightweight aluminum alloy/SiC hollow sphere syntactic foams and compressive characterization and Materials Research Directorate, Aberdeen Proving Ground, MD 21005 USA ABSTRACT Aluminum alloy A356 filled matrix composite (AMC) systems. Aluminum alloys and AMCs have been used to replace steel in automotive

  9. Shock compression profiles in ceramics

    SciTech Connect (OSTI)

    Grady, D.E.; Moody, R.L.

    1996-03-01T23:59:59.000Z

    An investigation of the shock compression properties of high-strength ceramics has been performed using controlled planar impact techniques. In a typical experimental configuration, a ceramic target disc is held stationary, and it is struck by plates of either a similar ceramic or by plates of a well-characterized metal. All tests were performed using either a single-stage propellant gun or a two-stage light-gas gun. Particle velocity histories were measured with laser velocity interferometry (VISAR) at the interface between the back of the target ceramic and a calibrated VISAR window material. Peak impact stresses achieved in these experiments range from about 3 to 70 GPa. Ceramics tested under shock impact loading include: Al{sub 2}O{sub 3}, AlN, B{sub 4}C, SiC, Si{sub 3}N{sub 4}, TiB{sub 2}, WC and ZrO{sub 2}. This report compiles the VISAR wave profiles and experimental impact parameters within a database-useful for response model development, computational model validation studies, and independent assessment of the physics of dynamic deformation on high-strength, brittle solids.

  10. PHELIX for flux compression studies

    SciTech Connect (OSTI)

    Turchi, Peter J [Los Alamos National Laboratory; Rousculp, Christopher L [Los Alamos National Laboratory; Reinovsky, Robert E [Los Alamos National Laboratory; Reass, William A [Los Alamos National Laboratory; Griego, Jeffrey R [Los Alamos National Laboratory; Oro, David M [Los Alamos National Laboratory; Merrill, Frank E [Los Alamos National Laboratory

    2010-06-28T23:59:59.000Z

    PHELIX (Precision High Energy-density Liner Implosion eXperiment) is a concept for studying electromagnetic implosions using proton radiography. This approach requires a portable pulsed power and liner implosion apparatus that can be operated in conjunction with an 800 MeV proton beam at the Los Alamos Neutron Science Center. The high resolution (< 100 micron) provided by proton radiography combined with similar precision of liner implosions driven electromagnetically can permit close comparisons of multi-frame experimental data and numerical simulations within a single dynamic event. To achieve a portable implosion system for use at high energy-density in a proton laboratory area requires sub-megajoule energies applied to implosions only a few cms in radial and axial dimension. The associated inductance changes are therefore relatively modest, so a current step-up transformer arrangement is employed to avoid excessive loss to parasitic inductances that are relatively large for low-energy banks comprising only several capacitors and switches. We describe the design, construction and operation of the PHELIX system and discuss application to liner-driven, magnetic flux compression experiments. For the latter, the ability of strong magnetic fields to deflect the proton beam may offer a novel technique for measurement of field distributions near perturbed surfaces.

  11. Forklift Training -GeneralForklift Training -General OSHA Standards

    E-Print Network [OSTI]

    Portman, Douglas

    motors or internal combustion engines. · It does not apply to compressed air or nonflammable compressed powered by electric motors or internal combustion engines. · It does not apply to compressed air

  12. Analysis of Arithmetic Coding for Data Compression

    E-Print Network [OSTI]

    Howard, Paul G.; Vitter, Jeffrey Scott

    1992-01-01T23:59:59.000Z

    Arithmetic coding, in conjunction with a suitable probabilistic model, can pro- vide nearly optimal data compression. In this article we analyze the e ect that the model and the particular implementation of arithmetic ...

  13. Compressed Index for Dictionary Matching (extended abstract)

    E-Print Network [OSTI]

    Hon, Wing-Kai; Lam, Tak-Wah; Shah, Rahul; Siu-Lung, Tam; Vitter, Jeffrey Scott

    2008-01-01T23:59:59.000Z

    the kth- order empirical entropy of T, and ¾ is the size of the alphabet. In this paper we study compressed representation for another classical problem of string indexing, which is called dictionary matching in the literature. Precisely, a collection D...

  14. Ramp Compression Experiments - a Sensitivity Study

    SciTech Connect (OSTI)

    Bastea, M; Reisman, D

    2007-02-26T23:59:59.000Z

    We present the first sensitivity study of the material isentropes extracted from ramp compression experiments. We perform hydrodynamic simulations of representative experimental geometries associated with ramp compression experiments and discuss the major factors determining the accuracy of the equation of state information extracted from such data. In conclusion, we analyzed both qualitatively and quantitatively the major experimental factors that determine the accuracy of equations of state extracted from ramp compression experiments. Since in actual experiments essentially all the effects discussed here will compound, factoring out individual signatures and magnitudes, as done in the present work, is especially important. This study should provide some guidance for the effective design and analysis of ramp compression experiments, as well as for further improvements of ramp generators performance.

  15. Compressed Air Load Reduction Approaches and Innovations

    E-Print Network [OSTI]

    D'Antonio, M.; Epstein, G.; Moray, S.; Schmidt, C.

    2005-01-01T23:59:59.000Z

    are assessed. It is a common practice in facilities to simply add compressor capacity when faced with supply pressure or volume deficiencies, increasing the energy consumption associated with compressed air systems in industry. Additionally, in recent years...

  16. Sandia National Laboratories: percussive drilling with compressed...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    percussive drilling with compressed air Sandia and Atlas-Copco Secoroc Advance to Phase 2 in Their Geothermal Energy Project On July 31, 2013, in Energy, Geothermal, News, News &...

  17. Wavelet compression of geodetic integral operators

    E-Print Network [OSTI]

    Stuttgart, Universität

    1 Wavelet compression of geodetic integral operators W. Keller Institute of Geodesy, Universität possible wavelet approximation: · simplest possible wavelet--> Haar wavelet · decomposition depths = 0 => try better wavelet, use higher decomposition depth! For 1D application this question was studied

  18. An advanced vapor-compression desalination system 

    E-Print Network [OSTI]

    Lara Ruiz, Jorge Horacio Juan

    2006-04-12T23:59:59.000Z

    Currently, the two dominant desalination methods are reverse osmosis (RO) and multi-stage flash (MSF). RO requires large capital investment and maintenance, whereas MSF is too energy intensive. An innovative vapor-compression desalination system...

  19. Seneca Compressed Air Energy Storage (CAES) Project

    SciTech Connect (OSTI)

    None

    2012-11-30T23:59:59.000Z

    This document provides specifications for the process air compressor for a compressed air storage project, requests a budgetary quote, and provides supporting information, including compressor data, site specific data, water analysis, and Seneca CAES value drivers.

  20. Compressing measurements in quantum dynamic parameter estimation

    E-Print Network [OSTI]

    Magesan, Easwar

    We present methods that can provide an exponential savings in the resources required to perform dynamic parameter estimation using quantum systems. The key idea is to merge classical compressive sensing techniques with ...

  1. Compression and Creep of Venice Lagoon Sands

    E-Print Network [OSTI]

    Sanzeni, Alex

    A laboratory test program was conducted to evaluate the one-dimensional (1D) compression and creep properties of intact sand (and silty-sand) samples from a deep borehole at the Malamocco Inlet to the Venice Lagoon. The ...

  2. Dictionary Design for Distributed Compressive Sensing

    E-Print Network [OSTI]

    Chen, Wei; Wassell, Ian J.; Rodrigues, Miguel R. D.

    2014-08-20T23:59:59.000Z

    -signal correlation; and iii) inter-signal correlation. Simulation results showthat our dictionary design leads to an improved DCS reconstruction performance in com- parison to other designs. Index Terms— Compressive sensing, dictionary learning, dis- tributed... 1Dictionary Design for Distributed Compressive Sensing Wei Chen, Member, IEEE and Ian J. Wassell and Miguel R. D. Rodrigues, Member, IEEE Abstract—Conventional dictionary learning frameworks at- tempt to find a set of atoms that promote both signal...

  3. Compressed Indexes for Approximate String Matching

    E-Print Network [OSTI]

    Sung, Wing-Kin Ken"

    Compressed Indexes for Approximate String Matching Ho-Leung Chan1 Tak-Wah Lam1, Wing-Kin Sung2 Siu the index space to O(n log n). Huynh et al. [10] and Lam et al. [11] further compressed the index to O,wongss}@comp.nus.edu.sg Abstract. We revisit the problem of indexing a string S[1..n] to support searching all substrings

  4. Exergy Analysis of Industrial Air Compression

    E-Print Network [OSTI]

    Bader, W. T.; Kissock, J. K.

    every industrial plant as a source of exergy for tools, actuators, and a myriad of manufacturing processes. For this analysis, a typical scenario is considered with a compressor installed indoors. Conditions for the indoor surroundings... are temperature T I and pressure Ph while the outdoor conditions, the environment, are To and Po. The compressor system is defined as the compressor, dryer (aftercooler) and compressed air distribution system (piping). We assume that the compressed air exits...

  5. Lossy compression of weak lensing data

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Vanderveld, R Ali [Chicago U., EFI; Caltech /Caltech, JPL; Bernstein, Gary M [Pennsylvania U.; Stoughton, Chris [Fermilab; Rhodes, Jason [Caltech; Caltech, JPL; Massey, Richard [Royal Observ., Edinburgh; Dobke, Benjamin M [Caltech; Caltech, JPL

    2011-06-01T23:59:59.000Z

    Future orbiting observatories will survey large areas of sky in order to constrain the physics of dark matter and dark energy using weak gravitational lensing and other methods. Lossy compression of the resultant data will improve the cost and feasibility of transmitting the images through the space communication network. We evaluate the consequences of the lossy compression algorithm of Bernstein et al. (2010) for the high-precision measurement of weak-lensing galaxy ellipticities. This square-root algorithm compresses each pixel independently, and the information discarded is by construction less than the Poisson error from photon shot noise. For simulated space-based images (without cosmic rays) digitized to the typical 16 bits per pixel, application of the lossy compression followed by image-wise lossless compression yields images with only 2.4 bits per pixel, a factor of 6.7 compression. We demonstrate that this compression introduces no bias in the sky background. The compression introduces a small amount of additional digitization noise to the images, and we demonstrate a corresponding small increase in ellipticity measurement noise. The ellipticity measurement method is biased by the addition of noise, so the additional digitization noise is expected to induce a multiplicative bias on the galaxies measured ellipticities. After correcting for this known noise-induced bias, we find a residual multiplicative ellipticity bias of m {approx} -4 x 10{sup -4}. This bias is small when compared to the many other issues that precision weak lensing surveys must confront, and furthermore we expect it to be reduced further with better calibration of ellipticity measurement methods.

  6. Energy Efficiency in Compressed Air Systems 

    E-Print Network [OSTI]

    Hingorani, A.; Pavlov, A.

    2010-01-01T23:59:59.000Z

    of transfer of energy. Typical applications in this category are motive applications, such as driving pneumatic tools and cylinders, operating instruments, pneumatic actuation and other such processes. - Active air, where the compressed air takes..., for ease. 3. MINIMIZING THE COSTS OF USAGE OF COMPRESSED AIR Within the factory, similar rules as for distribution would apply. Older factories must have their piping thoroughly checked for leakage in the pipelines. Tools such as ultrasonic leak...

  7. Lossy compression of weak lensing data

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Vanderveld, R Ali; Bernstein, Gary M; Stoughton, Chris; Rhodes, Jason; Massey, Richard; Dobke, Benjamin M

    2011-06-01T23:59:59.000Z

    Future orbiting observatories will survey large areas of sky in order to constrain the physics of dark matter and dark energy using weak gravitational lensing and other methods. Lossy compression of the resultant data will improve the cost and feasibility of transmitting the images through the space communication network. We evaluate the consequences of the lossy compression algorithm of Bernstein et al. (2010) for the high-precision measurement of weak-lensing galaxy ellipticities. This square-root algorithm compresses each pixel independently, and the information discarded is by construction less than the Poisson error from photon shot noise. For simulated space-based images (without cosmicmore »rays) digitized to the typical 16 bits per pixel, application of the lossy compression followed by image-wise lossless compression yields images with only 2.4 bits per pixel, a factor of 6.7 compression. We demonstrate that this compression introduces no bias in the sky background. The compression introduces a small amount of additional digitization noise to the images, and we demonstrate a corresponding small increase in ellipticity measurement noise. The ellipticity measurement method is biased by the addition of noise, so the additional digitization noise is expected to induce a multiplicative bias on the galaxies measured ellipticities. After correcting for this known noise-induced bias, we find a residual multiplicative ellipticity bias of m {approx} -4 x 10{sup -4}. This bias is small when compared to the many other issues that precision weak lensing surveys must confront, and furthermore we expect it to be reduced further with better calibration of ellipticity measurement methods.« less

  8. The Future of Image Compression William A. Pearlman

    E-Print Network [OSTI]

    compact, higher power batteries would expand application scenarios for compression · Miniaturization

  9. Wavelet Based Color Image Compression and MathematicalWavelet Based Color Image Compression and MathematicalWavelet Based Color Image Compression and MathematicalWavelet Based Color Image Compression and Mathematical Analysis of Sign Entropy CodingAnalysi

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Wavelet Based Color Image Compression and MathematicalWavelet Based Color Image Compression and MathematicalWavelet Based Color Image Compression and MathematicalWavelet Based Color Image Compression.olivier@univ-poitiers.fr Abstract One of the advantages of the Discrete Wavelet Transform (DWT) compared to Fourier Transform (e

  10. DNA Compression Challenge Revisited: a Dynamic Programming Approach

    E-Print Network [OSTI]

    Lonardi, Stefano

    DNA Compression Challenge Revisited: a Dynamic Programming Approach Behshad Behzadi and Fabrice Le Fessant LIX, Ecole Polytechnique, Paris, FRANCE June 21 2005 B. Behzadi, F. Le Fessant (LIX) DNA Compression June 21 2005 1 / 38 #12;Outline 1 DNA Compression Challenge 2 Tools and Methods 3 DNA Compression

  11. Micropillar compression technique applied to micron-scale mudstone elasto-plastic deformation.

    SciTech Connect (OSTI)

    Michael, Joseph Richard; Chidsey, Thomas (Utah Geological Survey, Salt Lake City, UT); Heath, Jason E.; Dewers, Thomas A.; Boyce, Brad Lee; Buchheit, Thomas Edward

    2010-12-01T23:59:59.000Z

    Mudstone mechanical testing is often limited by poor core recovery and sample size, preservation and preparation issues, which can lead to sampling bias, damage, and time-dependent effects. A micropillar compression technique, originally developed by Uchic et al. 2004, here is applied to elasto-plastic deformation of small volumes of mudstone, in the range of cubic microns. This study examines behavior of the Gothic shale, the basal unit of the Ismay zone of the Pennsylvanian Paradox Formation and potential shale gas play in southeastern Utah, USA. Precision manufacture of micropillars 5 microns in diameter and 10 microns in length are prepared using an ion-milling method. Characterization of samples is carried out using: dual focused ion - scanning electron beam imaging of nano-scaled pores and distribution of matrix clay and quartz, as well as pore-filling organics; laser scanning confocal (LSCM) 3D imaging of natural fractures; and gas permeability, among other techniques. Compression testing of micropillars under load control is performed using two different nanoindenter techniques. Deformation of 0.5 cm in diameter by 1 cm in length cores is carried out and visualized by a microscope loading stage and laser scanning confocal microscopy. Axisymmetric multistage compression testing and multi-stress path testing is carried out using 2.54 cm plugs. Discussion of results addresses size of representative elementary volumes applicable to continuum-scale mudstone deformation, anisotropy, and size-scale plasticity effects. Other issues include fabrication-induced damage, alignment, and influence of substrate.

  12. Compression-induced failure of electro-active polymeric thin films

    E-Print Network [OSTI]

    Domenico De Tommasi; Giuseppe Puglisi; Giuseppe Zurlo

    2010-12-07T23:59:59.000Z

    The insurgence of compression induces wrinkling in actuation devices based on EAPs thin films leading to a sudden decrease of performances up to failure. Based on the classical tension field theory for thin elastic membranes, we provide a general framework for the analysis of the insurgence of in-plane compression in membranes of electroactive polymers (EAPs). Our main result is the deduction of a (voltage-dependent) domain in the stretch space which represents tensile configurations. Under the assumption of Mooney-Rivlin materials, we obtain that for growing values of the applied voltage the domain contracts, vanishing at a critical voltage above which the polymer is wrinkled for any stretch configuration. Our approach can be easily implemented in numerical simulations for more complex material behaviors and provides a tool for the analysis of compression instability as a function of the elastic moduli.

  13. H2USA | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking of Blythe Solar Power Project Groundof|than Ever | DepartmentofH2USA H2USA

  14. On Compress-Forward without Wyner-Ziv Binning for Relay Networks

    E-Print Network [OSTI]

    Zhong, Peng; Vu, Mai

    2011-01-01T23:59:59.000Z

    Noisy network coding is recently proposed for the general multi-source network by Lim, Kim, El Gamal and Chung. This scheme builds on compress-forward (CF) relaying but involves three new ideas, namely no Wyner-Ziv binning, relaxed simultaneous decoding and message repetition. In this paper, using the two-way relay channel as the underlining example, we analyze the impact of each of these ideas on the achievable rate region of relay networks. First, CF without binning but with joint decoding of both the message and compression index can achieve a larger rate region than the original CF scheme for multi-destination relay networks. With binning and successive decoding, the compression rate at each relay is constrained by the weakest link from the relay to a destination; but without binning, this constraint is relaxed. Second, simultaneous decoding of all messages over all blocks without uniquely decoding the compression indices can remove the constraints on compression rate completely, but is still subject to t...

  15. IEEE Energy2030 Atlanta, Georgia, USA

    E-Print Network [OSTI]

    Ratnasamy, Sylvia

    an innovative electric power architecture, rooted in lessons learned from the Internet and microgrids, whichIEEE Energy2030 Atlanta, Georgia, USA 17-18 November 2008 An Architecture for Local Energy-disruptive incremental adoption. Such a system, which we term a "LoCal" grid, is controlled by intelligent power switches

  16. Black Shales Adina Paytan, Stanford University, USA

    E-Print Network [OSTI]

    Paytan, Adina

    Tales of Black Shales Adina Paytan, Stanford University, USA Several times during the middle of the Cretaceous period, between 125 and 80 million years ago, organic-carbon-rich black shales were deposited over large areas of the ocean floor. These black shales provide valuable information about past climates

  17. Ocean Thermal Energy Conversion Mostly about USA

    E-Print Network [OSTI]

    Ocean Thermal Energy Conversion History Mostly about USA 1980's to 1990's and bias towards Vega Structures (Plantships) · Bottom-Mounted Structures · Model Basin Tests/ At-Sea Tests · 210 kW OC-OTEC) #12;#12;Claude's Off Rio de Janeiro (1933) · Floating Ice Plant: 2.2 MW OC- OTEC to produce 2000

  18. Ocean Thermal Energy Conversion Mostly about USA

    E-Print Network [OSTI]

    Ocean Thermal Energy Conversion History Mostly about USA 1980's to 1990's and bias towards Vega · Floating Structures (Plantships) · Bottom-Mounted Structures · Model Basin Tests/ At-Sea Tests · 210 kW OC-OTEC: Georges Claude (Open Cycle OTEC) · 1928 Ougree Experiment, France: Factory Water Outflow (33 °C) & Meuse

  19. Fixed Block Compression Boosting in FM-Indexes

    E-Print Network [OSTI]

    Kärkkäinen, Juha

    2011-01-01T23:59:59.000Z

    A compressed full-text self-index occupies space close to that of the compressed text and simultaneously allows fast pattern matching and random access to the underlying text. Among the best compressed self-indexes, in theory and in practice, are several members of the FM-index family. In this paper, we describe new FM-index variants that combine nice theoretical properties, simple implementation and improved practical performance. Our main result is a new technique called fixed block compression boosting, which is a simpler and faster alternative to optimal compression boosting and implicit compression boosting used in previous FM-indexes.

  20. Performances of Multi-Level and Multi-Component Compressed Bitmap Indices

    E-Print Network [OSTI]

    Wu, Kesheng; Stockinger, Kurt; Shoshani, Arie

    2007-01-01T23:59:59.000Z

    Without compression, the index sizes monotonically decreaseprocessing cost. With compression, the index sizes no longermulti-component indexes without compression. Let C 1 , C

  1. Improving Energy Efficiency of Compressed Air System Based on System Audit

    E-Print Network [OSTI]

    Shanghai, Hongbo Qin; McKane, Aimee

    2008-01-01T23:59:59.000Z

    50 compressed air system energy audits completed by Shanghai50 compressed air system energy audits completed by Shanghaiof compressed air energy audits conducted by the Shanghai

  2. Alternative Fuel Vehicles: The Case of Compressed Natural Gas (CNG) Vehicles in California Households

    E-Print Network [OSTI]

    Abbanat, Brian A.

    2001-01-01T23:59:59.000Z

    VEHICLES: THE CASE OF COMPRESSED NATURAL GAS (CNG) VEHICLESyou first learn about compressed natural gas (CNG) vehicles?VEHICLES: THE CASE OF COMPRESSED NATURAL GAS (CNG) VEHICLES

  3. Seneca Compressed Air Energy Storage (CAES) Project

    SciTech Connect (OSTI)

    None

    2012-11-30T23:59:59.000Z

    Compressed Air Energy Storage (CAES) is a hybrid energy storage and generation concept that has many potential benefits especially in a location with increasing percentages of intermittent wind energy generation. The objectives of the NYSEG Seneca CAES Project included: for Phase 1, development of a Front End Engineering Design for a 130MW to 210 MW utility-owned facility including capital costs; project financials based on the engineering design and forecasts of energy market revenues; design of the salt cavern to be used for air storage; draft environmental permit filings; and draft NYISO interconnection filing; for Phase 2, objectives included plant construction with a target in-service date of mid-2016; and for Phase 3, objectives included commercial demonstration, testing, and two-years of performance reporting. This Final Report is presented now at the end of Phase 1 because NYSEG has concluded that the economics of the project are not favorable for development in the current economic environment in New York State. The proposed site is located in NYSEG’s service territory in the Town of Reading, New York, at the southern end of Seneca Lake, in New York State’s Finger Lakes region. The landowner of the proposed site is Inergy, a company that owns the salt solution mining facility at this property. Inergy would have developed a new air storage cavern facility to be designed for NYSEG specifically for the Seneca CAES project. A large volume, natural gas storage facility owned and operated by Inergy is also located near this site and would have provided a source of high pressure pipeline quality natural gas for use in the CAES plant. The site has an electrical take-away capability of 210 MW via two NYSEG 115 kV circuits located approximately one half mile from the plant site. Cooling tower make-up water would have been supplied from Seneca Lake. NYSEG’s engineering consultant WorleyParsons Group thoroughly evaluated three CAES designs and concluded that any of the designs would perform acceptably. Their general scope of work included development of detailed project construction schedules, capital cost and cash flow estimates for both CAES cycles, and development of detailed operational data, including fuel and compression energy requirements, to support dispatch modeling for the CAES cycles. The Dispatch Modeling Consultant selected for this project was Customized Energy Solutions (CES). Their general scope of work included development of wholesale electric and gas market price forecasts and development of a dispatch model specific to CAES technologies. Parsons Brinkerhoff Energy Storage Services (PBESS) was retained to develop an air storage cavern and well system design for the CAES project. Their general scope of work included development of a cavern design, solution mining plan, and air production well design, cost, and schedule estimates for the project. Detailed Front End Engineering Design (FEED) during Phase 1 of the project determined that CAES plant capital equipment costs were much greater than the $125.6- million originally estimated by EPRI for the project. The initial air storage cavern Design Basis was increased from a single five million cubic foot capacity cavern to three, five million cubic foot caverns with associated air production wells and piping. The result of this change in storage cavern Design Basis increased project capital costs significantly. In addition, the development time required to complete the three cavern system was estimated at approximately six years. This meant that the CAES plant would initially go into service with only one third of the required storage capacity and would not achieve full capability until after approximately five years of commercial operation. The market price forecasting and dispatch modeling completed by CES indicated that the CAES technologies would operate at only 10 to 20% capacity factors and the resulting overall project economics were not favorable for further development. As a result of all of these factors, the Phase 1 FEED developed an installe

  4. General Publications

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHall ATours,Dioxide andNationalallGeneralGeneral

  5. General Publications

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental AssessmentsGeoffrey Campbelllong version)Confinement |GeneralGeneral

  6. General Recommendations

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental AssessmentsGeoffrey Campbelllong version)Confinement |GeneralGeneral»

  7. Hydrodynamic compressibility of high-strength ceramics

    SciTech Connect (OSTI)

    Grady, D.E.

    1993-08-01T23:59:59.000Z

    In this study we have developed the techniques to investigate the hydrodynamic response of high-strength ceramics by mixing these powders with copper powder, preparing compacts, and performing shock compression tests on these mixtures. Hydrodynamics properties of silicon carbide, titanium diboride, and boron carbide to 30 GPa were examined by this method, and hydrodynamic compression data for these ceramics have been determined. We have concluded, however, that the measurement method is sensitive to sample preparation and uncertainties in shock wave measurements. Application of the experimental technique is difficult and further efforts are needed.

  8. Compressed Air Systems Audits - Why? And How?

    E-Print Network [OSTI]

    Kemp, H. L.

    2004-01-01T23:59:59.000Z

    . Secondly, join us in the definition of compressed air as a system, the totality of which is comprised of the Supply Side and the Demand Side. The Supply Side is the compressors and their controls, receivers (primary storage tanks), aftercoolers, filters... and dryers, and ends at the Compressor Room door. The Demand side is all of the distribution piping system, and all of the end uses of the compressed air, including leaks The function of the audit (be it walk-through, assessment or full audit...

  9. Understanding the Basics of Compressed Air Systems

    E-Print Network [OSTI]

    Herron, D. J.

    compressed air loss to 5% of total compressed air generated. POTENTIAL SAVINGS CALCULATION Calculation to determine potential savings: % wasted hp x connected hp x .746 (kWhlM1p) x S/kWh x .90(system efficiency 8000 (operating hours/yr) $/yr...(potential savings) Example: (10 (wasted hpl x 750 hp x .746 x $.05 x 8000 = S24,867/yr .90 Calculation to determine full load cost: bhp x .746 x S/kWh x opt:rating hours motor eff. 3M Company St. Paul, MN Example: (500 cfm, 125 bhp, S.05/kWh, 8000...

  10. Fast electron microscopy via compressive sensing

    DOE Patents [OSTI]

    Larson, Kurt W; Anderson, Hyrum S; Wheeler, Jason W

    2014-12-09T23:59:59.000Z

    Various technologies described herein pertain to compressive sensing electron microscopy. A compressive sensing electron microscope includes a multi-beam generator and a detector. The multi-beam generator emits a sequence of electron patterns over time. Each of the electron patterns can include a plurality of electron beams, where the plurality of electron beams is configured to impart a spatially varying electron density on a sample. Further, the spatially varying electron density varies between each of the electron patterns in the sequence. Moreover, the detector collects signals respectively corresponding to interactions between the sample and each of the electron patterns in the sequence.

  11. Compressed Air Systems | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T, Inc.'sEnergyTexas1.Space DataEnergyCompressed Air Systems Compressed Air

  12. alto ca usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Technology, Pasadena, CA 91109, USA; amainzer@jpl.nasa.gov 2 Infrared Processing, Tucson, AZ 85719, USA 4 Department of Physics and Astronomy, UCLA, P.O. Box 91547, Los...

  13. austin tx usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    78712, USA b Bureau of Economic Geology, Jackson School of Geology, The University of Texas at Austin, Austin, TX 78713, USA c Department of Mathematics Minkoff, Susan E. 50...

  14. Smeg USA: Order (2011-CE-14/1909)

    Broader source: Energy.gov [DOE]

    DOE ordered Smeg USA, Inc. to pay a $6,000 civil penalty after finding Smeg USA had failed to certify that certain models of dishwashers and refrigerators comply with the applicable energy conservation standards.

  15. DuraLamp USA: Order (2010-CE-0912)

    Broader source: Energy.gov [DOE]

    DOE ordered DuraLamp USA, Inc. to pay a $2,500 civil penalty after finding DuraLamp USA had failed to certify that model PAR 30, an incandescent reflector lamp, complies with the applicable energy conservation standards.

  16. Fact Sheet: Isothermal Compressed Air Energy Storage (October...

    Broader source: Energy.gov (indexed) [DOE]

    SustainX will demonstrate an isothermal compressed air energy storage (ICAES) system. The system captures the heat from compression in water and stores the captured heat until it...

  17. COLLOQUIUM: Compressed Air Energy Storage: The Bridge to Our...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 30, 2014, 4:00pm to 5:30pm Colloquia MBG Auditorium COLLOQUIUM: Compressed Air Energy Storage: The Bridge to Our Renewable Energy Future Mr. Al Cavallo Consultant Compressed...

  18. Massive-scale RDF Processing Using Compressed Bitmap Indexes

    E-Print Network [OSTI]

    Madduri, Kamesh

    2013-01-01T23:59:59.000Z

    offers enough compression that the worst-case index size iscompression method to further improve the bitmap indexes forcompression methods are designed to minimize the compressed size of the index.

  19. 2014 - LNG Export, Compressed Natural Gas (CNG), Re-Exports ...

    Broader source: Energy.gov (indexed) [DOE]

    4 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas Applications 2014 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas...

  20. automated chest compression: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    or compressibility when acquiring signals in a compressible signal into a small amount of data.Interestingly,this may be changing the way engineers think Wang, Hsin-Min 350...

  1. CO? compression for capture-enabled power systems

    E-Print Network [OSTI]

    Suri, Rajat

    2009-01-01T23:59:59.000Z

    The objective of this thesis is to evaluate a new carbon dioxide compression technology - shock compression - applied specifically to capture-enabled power plants. Global warming has increased public interest in carbon ...

  2. Compressing Social Networks The Minimum Logarithmic Arrangement Problem

    E-Print Network [OSTI]

    Safro, Ilya

    Compressing Social Networks The Minimum Logarithmic Arrangement Problem Chad Waters School Orderings Heuristic Conclusion Motivation Determine the extent to which social networks can be compressed adjacency queries. Social networks are not random graphs. Exhibit distinctive local properties

  3. Energy Efficiency in Compressed Air Systems

    E-Print Network [OSTI]

    Hingorani, A.; Pavlov, A.

    2010-01-01T23:59:59.000Z

    Energy use in compressed air systems accounts for typically 10% of the total industrial electricity consumption. It also accounts for close to 99% of the CO2 footprint of an air compressor and approximately 80% of the life cycle costs of a...

  4. Advanced Controls for Industrial Compressed Air Systems

    E-Print Network [OSTI]

    Vold, P.; Gabel, S.; Carmichael, L.; Curtner, K.; Cirillo, N. C. Jr.

    at a Goulds Pumps manufacturing plant in Seneca Falls, New York, and is currently undergoing field testing. The compressed air system will optimize the energy efficiency of the 7 compressor system (1,850hp) at Goulds, while reducing system pressure...

  5. Cryo-compressed Hydrogen Storage. Tobias Brunner

    E-Print Network [OSTI]

    distribution along highways and in remote areas. Gaseous hydrogen distribution via pipelines in onlyCryo-compressed Hydrogen Storage. Tobias Brunner February 15th, 2011, Washington D.C. BMW Hydrogen. Hydrogen Storage Workshop. BMW EfficientDynamics Less emissions. More driving pleasure. #12;BMW Hydrogen

  6. Compression of Antiproton Clouds for Antihydrogen Trapping

    E-Print Network [OSTI]

    G. B. Andresen; W. Bertsche; P. D. Bowe; C. C. Bray; E. Butler; C. L. Cesar; S. Chapman; M. Charlton; J. Fajans; M. C. Fujiwara; R. Funakoshi; D. R. Gill; J. S. Hangst; W. N. Hardy; R. S. Hayano; M. E. Hayden; R. Hydomako; M. J. Jenkins; L. V. Jorgensen; L. Kurchaninov; R. Lambo; N. Madsen; P. Nolan; K. Olchanski; A. Olin; A. Povilus; P. Pusa; F. Robicheaux; E. Sarid; S. Seif El Nasr; D. M. Silveira; J. W. Storey; R. I. Thompson; D. P. van der Werf; J. S. Wurtele; Y. Yamazaki

    2008-06-30T23:59:59.000Z

    Control of the radial profile of trapped antiproton clouds is critical to trapping antihydrogen. We report the first detailed measurements of the radial manipulation of antiproton clouds, including areal density compressions by factors as large as ten, by manipulating spatially overlapped electron plasmas. We show detailed measurements of the near-axis antiproton radial profile and its relation to that of the electron plasma.

  7. Technical Notes Compressive Sensing and Reconstruction

    E-Print Network [OSTI]

    Huang, Xun

    . Introduction COMPRESSIVE sensing is a newly emerging signal-processing method [1,2] in information technologies. If some prior knowledge, such as an inherent model of the fluid process of interest, can be incorporated noise by interaction of fan and stator assembly [5,12]. This tonal frequency sound propagates through

  8. Distributed Compressed Sensing in Dynamic Networks

    E-Print Network [OSTI]

    Eldar, Yonina

    Distributed Compressed Sensing in Dynamic Networks Stacy Patterson Department of Computer Science theoretical results to develop a distributed version of IHT for dynamic networks. Evaluations show that our throughout the network, it is desirable to perform this recovery within the network in a distributed fashion

  9. Regression Cubes with Lossless Compression and Aggregation

    E-Print Network [OSTI]

    Pei, Jian

    , in addition to the traditional simple measures such as count and average. Such new measures will allow users space. In this paper, we propose a fundamentally new class of measures, compressible measures, in order. With years of research and development of data warehouse and OLAP technology [15], [7], [1], [34], a large

  10. Asynchronous Compressive Radar , Samuel Palermo1

    E-Print Network [OSTI]

    Palermo, Sam

    produces considerable static power during the charge accumulation stage. As both the mixer and integrator] for data compression. An employed random demodulator front-end, which consisting of a dedicated mixer and an integrator, implements CS front-end in [4]. In this architecture the mixer must operate at or above

  11. version:13may14a The USA & the Global Oil System

    E-Print Network [OSTI]

    O'Donnell, Tom

    ....................................................................................... 4 1.5 Fracking: USA oil & gas revolution

  12. Summary of Compression Testing of U-10Mo

    SciTech Connect (OSTI)

    Nyberg, Eric A.; Joshi, Vineet V.; Lavender, Curt A.; Burkes, Douglas

    2012-10-31T23:59:59.000Z

    The mechanical properties of depleted uranium plus 10 weight percent molybdenum alloy have been evaluated by high temperature compression testing.

  13. Geophysical Fluid Dynamics Laboratory general circulation model investigation of the indirect radiative effects

    E-Print Network [OSTI]

    Russell, Lynn

    Geophysical Fluid Dynamics Laboratory general circulation model investigation of the indirect Corporation for Atmospheric Research, Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey, USA V. Ramaswamy, Paul A. Ginoux, and Larry W. Horowitz Geophysical Fluid Dynamics Laboratory, Princeton, New

  14. Novel Spark Plugs Improve Energy Efficiency of Compressed Natural

    E-Print Network [OSTI]

    Novel Spark Plugs Improve Energy Efficiency of Compressed Natural Gas Engines Energy Innovations use affects climate change. Vehicles operating on compressed natural gas reduce petroleum fuel use, the vast majority of compressed natural gas (CNG) engines are used in transit buses serving the public

  15. Prediction-Based Compression Ratio Boundaries for Medical Images

    E-Print Network [OSTI]

    Qi, Xiaojun

    Prediction-Based Compression Ratio Boundaries for Medical Images Xiaojun Qi Computer Science present prediction-based image compression techniques take advantage of either intra- or inter function. The prediction-based compression technique has been applied on some magnetic resonance (MR) brain

  16. The Effect of Accumulation of Excess Energy of a Body in Gravitational Compression

    E-Print Network [OSTI]

    S. S. Gershtein; A. A. Logunov; M. A. Mestvirishvili

    2014-04-11T23:59:59.000Z

    It is shown that a gravitational compression of a spherical body results in an infinite growth of the energy of a body as its radius comes close to $GM/c^2$. This gives rise to a negative defect of mass and, due to an instability, to an expansion or to an explosion. A rigorous proof of the above statement can be obtained within the General Relativity in the harmonic coordinates.

  17. Saving Energy in Industrial Compressed Air Systems: Issues and Obstacles in DSM Program Design

    E-Print Network [OSTI]

    Trojanowski, D.; Parfomak, P.

    contained compressed air systems.(I) Air compressors are generally driven by electric motors, often in large sizes and often operating continuously throughout the day. As a result, compressors can account for a substantial fraction of the electricity... consumption and peak demand in a given facility. A study by North Carolina A&T University found that air compressors accounted for as much as 49 % of base energy consumption, and up to 58% of peak electrical demand, in the facilities they audited.(2...

  18. General Information

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHall ATours,Dioxide andNationalallGeneral

  19. General Tables

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental AssessmentsGeoffrey Campbelllong version)ConfinementGeneral Tables The

  20. General Information

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.Newof EnergyFundingGene ControlsCounsel Law StudentGeneral

  1. New Regenerative Cycle for Vapor Compression Refrigeration

    SciTech Connect (OSTI)

    Mark J. Bergander

    2005-08-29T23:59:59.000Z

    The main objective of this project is to confirm on a well-instrumented prototype the theoretically derived claims of higher efficiency and coefficient of performance for geothermal heat pumps based on a new regenerative thermodynamic cycle as comparing to existing technology. In order to demonstrate the improved performance of the prototype, it will be compared to published parameters of commercially available geothermal heat pumps manufactured by US and foreign companies. Other objectives are to optimize the design parameters and to determine the economic viability of the new technology. Background (as stated in the proposal): The proposed technology closely relates to EERE mission by improving energy efficiency, bringing clean, reliable and affordable heating and cooling to the residential and commercial buildings and reducing greenhouse gases emission. It can provide the same amount of heating and cooling with considerably less use of electrical energy and consequently has a potential of reducing our nations dependence on foreign oil. The theoretical basis for the proposed thermodynamic cycle was previously developed and was originally called a dynamic equilibrium method. This theory considers the dynamic equations of state of the working fluid and proposes the methods for modification of T-S trajectories of adiabatic transformation by changing dynamic properties of gas, such as flow rate, speed and acceleration. The substance of this proposal is a thermodynamic cycle characterized by the regenerative use of the potential energy of two-phase flow expansion, which in traditional systems is lost in expansion valves. The essential new features of the process are: (1) The application of two-step throttling of the working fluid and two-step compression of its vapor phase. (2) Use of a compressor as the initial step compression and a jet device as a second step, where throttling and compression are combined. (3) Controlled ratio of a working fluid at the first and second step of compression. In the proposed system, the compressor compresses the vapor only to 50-60% of the final pressure, while the additional compression is provided by a jet device using internal potential energy of the working fluid flow. Therefore, the amount of mechanical energy required by a compressor is significantly reduced, resulting in the increase of efficiency (either COP or EER). The novelty of the cycle is in the equipment and in the way the multi-staging is accomplished. The anticipated result will be a new refrigeration system that requires less energy to accomplish a cooling task. The application of this technology will be for more efficient designs of: (1) Industrial chillers, (2) Refrigeration plants, (3) Heat pumps, (4) Gas Liquefaction plants, (5) Cryogenic systems.

  2. Modeling of coupled thermodynamic and geomechanical performance of underground compressed air energy storage (CAES) in lined rock caverns

    E-Print Network [OSTI]

    Rutqvist, J.

    2013-01-01T23:59:59.000Z

    compressed air energy storage technology by the hydraulicscale electric energy storage technologies. Compressed air

  3. Compression of ground-motion data

    SciTech Connect (OSTI)

    Long, J.W.

    1981-04-01T23:59:59.000Z

    Ground motion data has been recorded for many years at Nevada Test Site and is now stored on thousands of digital tapes. The recording format is very inefficient in terms of space on tape. This report outlines a method to compress the data onto a few hundred tapes while maintaining the accuracy of the recording and allowing restoration of any file to the original format for future use. For future digitizing a more efficient format is described and suggested.

  4. Electrochemical Hydrogen Compression (EHC) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:RevisedAdvisory BoardNucleateElectrochemical Hydrogen Compression (EHC)

  5. Combined rankine and vapor compression cycles

    DOE Patents [OSTI]

    Radcliff, Thomas D.; Biederman, Bruce P.; Brasz, Joost J.

    2005-04-19T23:59:59.000Z

    An organic rankine cycle system is combined with a vapor compression cycle system with the turbine generator of the organic rankine cycle generating the power necessary to operate the motor of the refrigerant compressor. The vapor compression cycle is applied with its evaporator cooling the inlet air into a gas turbine, and the organic rankine cycle is applied to receive heat from a gas turbine exhaust to heat its boiler within one embodiment, a common condenser is used for the organic rankine cycle and the vapor compression cycle, with a common refrigerant, R-245a being circulated within both systems. In another embodiment, the turbine driven generator has a common shaft connected to the compressor to thereby eliminate the need for a separate motor to drive the compressor. In another embodiment, an organic rankine cycle system is applied to an internal combustion engine to cool the fluids thereof, and the turbo charged air is cooled first by the organic rankine cycle system and then by an air conditioner prior to passing into the intake of the engine.

  6. Efficient Joins with Compressed Bitmap Indexes

    SciTech Connect (OSTI)

    Computational Research Division; Madduri, Kamesh; Wu, Kesheng

    2009-08-19T23:59:59.000Z

    We present a new class of adaptive algorithms that use compressed bitmap indexes to speed up evaluation of the range join query in relational databases. We determine the best strategy to process a join query based on a fast sub-linear time computation of the join selectivity (the ratio of the number of tuples in the result to the total number of possible tuples). In addition, we use compressed bitmaps to represent the join output compactly: the space requirement for storing the tuples representing the join of two relations is asymptotically bounded by min(h; n . cb), where h is the number of tuple pairs in the result relation, n is the number of tuples in the smaller of the two relations, and cb is the cardinality of the larger column being joined. We present a theoretical analysis of our algorithms, as well as experimental results on large-scale synthetic and real data sets. Our implementations are efficient, and consistently outperform well-known approaches for a range of join selectivity factors. For instance, our count-only algorithm is up to three orders of magnitude faster than the sort-merge approach, and our best bitmap index-based algorithm is 1.2x-80x faster than the sort-merge algorithm, for various query instances. We achieve these speedups by exploiting several inherent performance advantages of compressed bitmap indexes for join processing: an implicit partitioning of the attributes, space-efficiency, and tolerance of high-cardinality relations.

  7. Fusion Power Associates, 2011 Annual Meeting 1 General Fusion

    E-Print Network [OSTI]

    7 Plasma Injector 10 people $3M 1 year #12;Fusion Power Associates, 2011 Annual Meeting 8 Density people $3.5M 14 months #12;Fusion Power Associates, 2011 Annual Meeting 11 Plasma Compression ExperimentsFusion Power Associates, 2011 Annual Meeting 1 General Fusion #12;Fusion Power Associates, 2011

  8. Absolute Energy USA | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1AMEE Jump to: navigation, search40Georgia:SL JumpAREGAbout(USA)

  9. Norvento USA LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRoseConcerns Jumpsource History ViewTexas: EnergyWind PowerUSA LLC Jump

  10. CleanFUEL USA | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovationin UrbanCity ofCityClean Economy Network JumpCleanCleanFUEL USA

  11. Energy Pro USA | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOEHazel Crest,EnergySerranopolis Jump to:EconCompaniesMainEnergy Pro USA Place:

  12. AREA USA LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDITCaliforniaWeifangwiki Home Jweers'sAIRMaster+APFED-GoodAPIsAREA USA

  13. Radiative Decay of Bubble Oscillations in a Compressible Fluid

    E-Print Network [OSTI]

    A. M. Shapiro; M. I. Weinstein

    2011-01-01T23:59:59.000Z

    Consider the dynamics of a gas bubble in an inviscid, compressible liquid with surface tension. Kinematic and dynamic boundary conditions couple the bubble surface deformation dynamics with the dynamics of waves in the fluid. This system has a spherical equilibrium state, resulting from the balance of the pressure at infinity and the gas pressure within the bubble. We study the linearized dynamics about this equilibrium state in a center of mass frame: 1) We prove that the velocity potential and bubble surface perturbation satisfy point-wise in space exponential time-decay estimates. 2) The time-decay rate is governed by scattering resonances, eigenvalues of a non-selfadjoint spectral problem. These are pole singularities in the lower half plane of the analytic continuation of a resolvent operator from the upper half plane, across the real axis into the lower half plane. 3) The time-decay estimates are a consequence of resonance mode expansions for the velocity potential and bubble surface perturbations. 4) For small compressibility (Mach number, a ratio of bubble wall velocity to sound speed, \\epsilon), this is a singular perturbation of the incompressible limit. The scattering resonances which govern the anomalously slow time-decay, are {\\it Rayleigh resonances}. Asymptotics, supported by high-precision numerical studies, indicate that the Rayleigh resonances which are closest to the real axis satisfy | \\frac{\\Im \\lambda_\\star(\\epsilon)}{\\Re \\lambda_\\star(\\epsilon)} | = {\\cal O} (\\exp(-\\kappa\\ \\We\\ \\epsilon^{-2})), \\kappa>0. Here, \\We denotes the Weber number, a dimensionless ratio comparing inertia and surface tension. 5) To obtain the above results we prove a general result, of independent interest, estimating the Neumann to Dirichlet map for the wave equation, exterior to a sphere.

  14. EA-1976: Emera CNG, LLC Compressed Natural Gas Project, Florida

    Broader source: Energy.gov [DOE]

    This EA will evaluate the potential environmental impacts associated with a proposal by Emera CNG, LLC that would include Emera's CNG plant Emera’s CNG plant would include facilities to receive, dehydrate, and compress gas to fill pressure vessels with an open International Organization for Standardization (ISO) container frame mounted on trailers. Emera plans to truck the trailers a distance of a quarter mile from its proposed CNG facility to a berth at the Port of Palm Beach, where the trailers will be loaded onto a roll-on/roll-off ocean going carrier. Emera plans to receive natural gas at its planned compression facility from the Riviera Lateral, a pipeline owned and operated by Peninsula Pipeline Company. Although this would be the principal source of natural gas to Emera’s CNG facility for export, during periods of maintenance at Emera’s facility, or at the Port of Palm Beach, Emera may obtain CNG from other sources and/or export CNG from other general-use Florida port facilities. The proposed Emera facility will initially be capable of loading 8 million cubic feet per day (MMcf/day) of CNG into ISO containers and, after full build-out, would be capable to load up to 25 MMcf/day. For the initial phase of the project, Emera intends to send these CNG ISO containers from Florida to Freeport, Grand Bahama Island, where the trailers will be unloaded, the CNG decompressed, and injected into a pipeline for transport to electric generation plants owned and operated by Grand Bahama Power Company (GBPC). DOE is authorizing the exportation of CNG and is not providing funding or financial assistance for the Emera Project.

  15. Secondary compression of peat with or without surcharging

    SciTech Connect (OSTI)

    Mesri, G.; Stark, T.D.; Ajlouni, M.A. [Univ. of Illinois, Urbana, IL (United States). Dept. of Civil Engineering; Chen, C.S. [Sino Geotechnology, Taipei (Taiwan, Province of China)

    1997-05-01T23:59:59.000Z

    Secondary compression is important in peat deposits because they exist at high void ratios and exhibit high values of compression index C{sub c}, display the highest values of C{sub {alpha}}/C{sub c} among geotechnical materials, and primary consolidation is completed in weeks or months in typical field situations. Secondary compression of Middleton peat was investigated by odometer tests on undisturbed specimens. The observed secondary compression behavior of this fibrous peat, with or without surcharging, is in accordance with the C{sub {alpha}}/C{sub c} concept of compressibility. Near the preconsolidation pressure, the secondary compression index, C{sub {alpha}}, increases significantly with time. In the compression range C{sub {alpha}} decreases only slightly with time, and for most practical purposes a constant C{sub {alpha}} with time can be used to compute secondary settlement. Postsurcharge secondary compression index, C{prime}{sub {alpha}}, always increases with time. This is predicted by the C{sub {alpha}}/C{sub c} concept of compressibility. A secant post-surcharge secondary compression index, C{double_prime}{sub {alpha}}, is therefore introduced for a simple computation of secondary settlement.

  16. Multiscale Representations of Water: Tailoring Generalization Sequences to Specific

    E-Print Network [OSTI]

    Klippel, Alexander

    in Geospatial Information Science (CEGIS), United States Geological Survey (USGS) , Rolla, Missouri USA Email.S. Geological Survey (USGS). The work draws upon previously published methods for estimating upstream drainage and geologic conditions require differing generalization algorithms, parameters and processing sequences

  17. Vector Symbolic Architectures: A New Building Material for Artificial General

    E-Print Network [OSTI]

    Levy, Simon D.

    Vector Symbolic Architectures: A New Building Material for Artificial General Intelligence1 Simon D. LEVY a,2 , and Ross GAYLER b a Washington and Lee University, USA b Veda Advantage Solutions, Australia. By directly encoding structure using famil- iar, computationally efficient algorithms, VSA bypasses many

  18. Beijing, China, December 1-4 General Chairs

    E-Print Network [OSTI]

    Iosup, Alexandru

    Beijing, China, December 1-4 General Chairs Hai Jin, China Yun Liu, China Program Chairs Martin Gilje Jaatun, Norway Gansen Zhao, China Program Vice Chairs Franck Cappello (Chair) Hai Jin, China Frode Eika Sandnes, Norway Advisory Committee Mark Musen, USA

  19. Panagiota Daskalopoulos - Columbia University, U.S.A. Worn ...

    E-Print Network [OSTI]

    Panagiota Daskalopoulos - Columbia University, U.S.A.. Worn Stones with Flat Sides - All Time Regularity of the Interface. We study the all time regularity of the

  20. Euro Chef USA: Proposed Penalty (2014-CE-23004)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Euro Chef USA Inc. failed to certify cooking products as compliant with the applicable energy conservation standards.

  1. anaerobic digestion usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mathematical Journal Volume 21(2011), Number 1, 27 Institute for Cyber Security San Antonio, Texas 78249, USA shylmath@hotmail.com Communicated by the Editors 70 FUTURE...

  2. air station usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    in the USA Biology and Medicine Websites Summary: Parasitoids Air pollutants Heavy metals Metalloids INTRODUCTION Insect parasitoids (insects living parasitoids in...

  3. augusta maine usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    wetland in Augusta, Georgia, U.S.A. Geosciences Websites Summary: constructed treatment wetland in Augusta, Georgia were used to quantify the size, distribution,...

  4. arbor michigan usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    linguistic Lewis, Richard 2 Proceedings of the Seventh International Symposium on Cavitation (CAV2009) August 16-20, 2009, Ann Arbor, Michigan, USA Engineering Websites Summary:...

  5. International magnetic pulse compression workshop: (Proceedings)

    SciTech Connect (OSTI)

    Kirbie, H.C.; Newton, M.A.; Siemens, P.D.

    1991-04-01T23:59:59.000Z

    A few individuals have tried to broaden the understanding of specific and salient pulsed-power topics. One such attempt is this documentation of a workshop on magnetic switching as it applies primarily to pulse compression (power transformation), affording a truly international perspective by its participants under the initiative and leadership of Hugh Kirbie and Mark Newton of the Lawrence Livermore National Laboratory (LLNL) and supported by other interested organizations. During the course of the Workshop at Granlibakken, a great deal of information was amassed and a keen insight into both the problems and opportunities as to the use of this switching approach was developed. The segmented workshop format proved ideal for identifying key aspects affecting optimum performance in a variety of applications. Individual groups of experts addressed network and system modeling, magnetic materials, power conditioning, core cooling and dielectrics, and finally circuits and application. At the end, they came together to consolidate their input and formulate the workshop's conclusions, identifying roadblocks or suggesting research projects, particularly as they apply to magnetic switching's trump card--its high-average-power-handling capability (at least on a burst-mode basis). The workshop was especially productive both in the quality and quantity of information transfer in an environment conducive to a free and open exchange of ideas. We will not delve into the organization proper of this meeting, rather we wish to commend to the interested reader this volume, which provides the definitive and most up-to-date compilation on the subject of magnetic pulse compression from underlying principles to current state of the art as well as the prognosis for the future of magnetic pulse compression as a consensus of the workshop's organizers and participants.

  6. High load operation in a homogeneous charge compression ignition engine

    DOE Patents [OSTI]

    Duffy, Kevin P. (Metamora, IL); Kieser, Andrew J. (Morton, IL); Liechty, Michael P. (Chillicothe, IL); Hardy, William L. (Peoria, IL); Rodman, Anthony (Chillicothe, IL); Hergart, Carl-Anders (Peoria, IL)

    2008-12-23T23:59:59.000Z

    A homogeneous charge compression ignition engine is set up by first identifying combinations of compression ratio and exhaust gas percentages for each speed and load across the engines operating range. These identified ratios and exhaust gas percentages can then be converted into geometric compression ratio controller settings and exhaust gas recirculation rate controller settings that are mapped against speed and load, and made available to the electronic

  7. Low emissions compression ignited engine technology

    DOE Patents [OSTI]

    Coleman, Gerald N. (Dunlap, IL); Kilkenny, Jonathan P. (Peoria, IL); Fluga, Eric C. (Dunlap, IL); Duffy, Kevin P. (East Peoria, IL)

    2007-04-03T23:59:59.000Z

    A method and apparatus for operating a compression ignition engine having a cylinder wall, a piston, and a head defining a combustion chamber. The method and apparatus includes delivering fuel substantially uniformly into the combustion chamber, the fuel being dispersed throughout the combustion chamber and spaced from the cylinder wall, delivering an oxidant into the combustion chamber sufficient to support combustion at a first predetermined combustion duration, and delivering a diluent into the combustion chamber sufficient to change the first predetermined combustion duration to a second predetermined combustion duration different from the first predetermined combustion duration.

  8. Coke cake behavior under compressive forces

    SciTech Connect (OSTI)

    Watakabe, S.; Takeda, T.; Itaya, H.; Suginobe, H.

    1997-12-31T23:59:59.000Z

    The deformation of the coke cake and load on the side wall during pushing were studied using an electric furnace equipped with a movable wall. Coke cake was found to deform in three stages under compressive forces. The coke cake was shortened in the pushing direction in the cake deformation stage, and load was generated on the side walls in the high wall load stage. Secondary cracks in the coke cake were found to prevent load transmission on the wall. The maximum load transmission rate was controlled by adjusting the maximum fluidity and mean reflectance of the blended coal.

  9. CO2 Compression | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWPSuccess Stories Siteandscience, and8Critical4CO2 Compression CO2

  10. Minimize Compressed Air Leaks | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOil &315_ArnibanPriority DataPART 970MidwestChallengeCompressed Air

  11. A New Compressive Imaging Camera Architecture using Optical-Domain Compression

    E-Print Network [OSTI]

    for processing, to a "computa- tional signal processing" (CSP) paradigm, where analog signals are converted nonlinear techniques. 1.1. Compressive sensing CSP builds upon a core tenet of signal processing a decorrelating transform to compact a correlated signal's energy into just a few essential coefficients.1

  12. artificial compressibility method: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    solutions of the Incompressible Navier Stokes system on exterior domains via the artificial compressibility method Mathematical Physics (arXiv) Summary: In this paper we study...

  13. A Compressed Self-Index for Genomic Databases

    E-Print Network [OSTI]

    Gagie, Travis; Nekrich, Yakov; Puglisi, Simon J

    2011-01-01T23:59:59.000Z

    Advances in DNA sequencing technology will soon result in databases of thousands of genomes. Within a species, individuals' genomes are almost exact copies of each other; e.g., any two human genomes are 99.9% the same. Relative Lempel-Ziv (RLZ) compression takes advantage of this property: it stores the first genome uncompressed or as an FM-index, then compresses the other genomes with a variant of LZ77 that copies phrases only from the first genome. RLZ achieves good compression and supports fast random access; in this paper we show how to support fast search as well, thus obtaining an efficient compressed self-index.

  14. COMPRESSIVE SAMPLING VS. CONVENTIONAL IMAGING Jarvis Haupt and Robert Nowak

    E-Print Network [OSTI]

    Haupt, Jarvis

    COMPRESSIVE SAMPLING VS. CONVENTIONAL IMAGING Jarvis Haupt and Robert Nowak University of Wisconsin from random projections than from pixel samples. However, the performance of CS can degrade markedly

  15. Saturable inductor and transformer structures for magnetic pulse compression

    DOE Patents [OSTI]

    Birx, Daniel L. (Londonderry, NH); Reginato, Louis L. (Orinda, CA)

    1990-01-01T23:59:59.000Z

    Saturable inductor and transformer for magnetic compression of an electronic pulse, using a continuous electrical conductor looped several times around a tightly packed core of saturable inductor material.

  16. Advancement in Fuel Spray and Combustion Modeling for Compression...

    Broader source: Energy.gov (indexed) [DOE]

    Applications Advancement in Fuel Spray and Combustion Modeling for Compression Ignition Engine Applications 2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies...

  17. NJ Compressed Natural Gas Refuse Trucks, Shuttle Buses and Infrastruct...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Vehicle Technologies Program Review Presentation NJ COMPRESSED NATURAL GAS REFUSE TRUCKS, SHUTTLE BUSES AND INFRASTRUCTURE Chuck Feinberg, Principal Investigator New Jersey Clean...

  18. Workshop Notes from ""Compressed Natural Gas and Hydrogen Fuels...

    Broader source: Energy.gov (indexed) [DOE]

    Workshop Notes from ""Compressed Natural Gas and Hydrogen Fuels: Lessons Learned for the Safe Deployment of Vehicles"" Workshop, December 10-11, 2009 Workshop Notes from...

  19. Rotary Vapor Compression Cycle Technology: A Pathway to Ultra...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Cycle Technology: A Pathway to Ultra-Efficient Air Conditioning, Heating and Refrigeration Rotary Vapor Compression Cycle Technology: A Pathway to Ultra-Efficient Air...

  20. Experiment Hazard Class 5.4 - Compressed Gas Cylinders

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    compressed flammable gas and pyrophoric gases. Consultation with EQO Industrial Hygiene when planning experiments that involve toxic gas, oxygen deficiency hazards or other...

  1. Multilayer compressive seal for sealing in high temperature devices

    DOE Patents [OSTI]

    Chou, Yeong-Shyung (Richland, WA); Stevenson, Jeffry W. (Richland, WA)

    2007-08-21T23:59:59.000Z

    A mica based compressive seal has been developed exhibiting superior thermal cycle stability when compared to other compressive seals known in the art. The seal is composed of compliant glass or metal interlayers and a sealing (gasket) member layer composed of mica that is infiltrated with a glass forming material, which effectively reduces leaks within the seal. The compressive seal shows approximately a 100-fold reduction in leak rates compared with previously developed hybrid seals after from 10 to about 40 thermal cycles under a compressive stress of from 50 psi to 100 psi at temperatures in the range from 600.degree. C. to about 850.degree. C.

  2. High Compression Ratio Turbo Gasoline Engine Operation Using...

    Broader source: Energy.gov (indexed) [DOE]

    Compression Ratio Turbo Gasoline Engine Operation Using Alcohol Enhancement PI: John B. Heywood Sloan Automotive Laboratory Massachusetts Institute of Technology June 19, 2014...

  3. VIDEO PRESENTATION AND COMPRESSION Borko Furht and Raymond Westwater

    E-Print Network [OSTI]

    Furht, Borko

    9 VIDEO PRESENTATION AND COMPRESSION Borko Furht and Raymond Westwater Florida Atlantic University........................................................................................................................ 172 1.1 VIDEO REPRESENTATION AND FORMATS.................................................................................. 172 1.2 VIDEO INFORMATION UNITS

  4. Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    with input from Salvador Aceves (Lawrence Livermore National Lab) and Tobias Brunner (BMW). Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular Applications...

  5. Childhood Agricultural Injury Prevention in the U.S.A.

    E-Print Network [OSTI]

    #12;Childhood Agricultural Injury Prevention in the U.S.A. Presentation for the Swedish University of Agricultural Sciences Barbara Lee, PhD National Farm Medicine Center National Children's Center for Rural and Agricultural Health and Safety Marshfield, WI USA October 2011 #12;#12;#12;Outline · Background · Child Ag

  6. University of Arizona Compressed Air Energy Storage

    SciTech Connect (OSTI)

    Simmons, Joseph; Muralidharan, Krishna

    2012-12-31T23:59:59.000Z

    Boiled down to its essentials, the grant’s purpose was to develop and demonstrate the viability of compressed air energy storage (CAES) for use in renewable energy development. While everyone agrees that energy storage is the key component to enable widespread adoption of renewable energy sources, the development of a viable scalable technology has been missing. The Department of Energy has focused on expanded battery research and improved forecasting, and the utilities have deployed renewable energy resources only to the extent of satisfying Renewable Portfolio Standards. The lack of dispatchability of solar and wind-based electricity generation has drastically increased the cost of operation with these components. It is now clear that energy storage coupled with accurate solar and wind forecasting make up the only combination that can succeed in dispatchable renewable energy resources. Conventional batteries scale linearly in size, so the price becomes a barrier for large systems. Flow batteries scale sub-linearly and promise to be useful if their performance can be shown to provide sufficient support for solar and wind-base electricity generation resources. Compressed air energy storage provides the most desirable answer in terms of scalability and performance in all areas except efficiency. With the support of the DOE, Tucson Electric Power and Science Foundation Arizona, the Arizona Research Institute for Solar Energy (AzRISE) at the University of Arizona has had the opportunity to investigate CAES as a potential energy storage resource.

  7. Compression station key to Texas pipeline project

    SciTech Connect (OSTI)

    NONE

    1996-10-01T23:59:59.000Z

    This was probably the largest pipeline project in the US last year, and the largest in Texas in the last decade. The new compressor station is a key element in this project. TECO, its servicing dealer, and compression packager worked closely throughout the planning and installation stages of the project. To handle the amount of gas required, TECO selected the GEMINI F604-1 compressor, a four-throw, single-stage unit with a six-inch stroke manufactured by Weatherford Enterra Compression Co. (WECC) in Corpus Christi, TX. TECO also chose WECC to package the compressors. Responsibility for ongoing support of the units will be shared among TECO, the service dealer and the packager. TECO is sending people to be trained by WECC, and because the G3600 family of engines is still relatively new, both the Caterpillar dealer and WECC sent people for advanced training at Caterpillar facilities in Peoria, IL. As part of its service commitment to TECO, the servicing dealer drew up a detailed product support plan, encompassing these five concerns: Training, tooling; parts support; service support; and commissioning.

  8. Frequency extrapolation by nonconvex compressive sensing

    SciTech Connect (OSTI)

    Chartrand, Rick [Los Alamos National Laboratory; Sidky, Emil Y [UNIV OF CHICAGO; Pan, Xiaochaun [UNIV OF CHICAGO

    2010-12-03T23:59:59.000Z

    Tomographic imaging modalities sample subjects with a discrete, finite set of measurements, while the underlying object function is continuous. Because of this, inversion of the imaging model, even under ideal conditions, necessarily entails approximation. The error incurred by this approximation can be important when there is rapid variation in the object function or when the objects of interest are small. In this work, we investigate this issue with the Fourier transform (FT), which can be taken as the imaging model for magnetic resonance imaging (MRl) or some forms of wave imaging. Compressive sensing has been successful for inverting this data model when only a sparse set of samples are available. We apply the compressive sensing principle to a somewhat related problem of frequency extrapolation, where the object function is represented by a super-resolution grid with many more pixels than FT measurements. The image on the super-resolution grid is obtained through nonconvex minimization. The method fully utilizes the available FT samples, while controlling aliasing and ringing. The algorithm is demonstrated with continuous FT samples of the Shepp-Logan phantom with additional small, high-contrast objects.

  9. Modeling of coupled thermodynamic and geomechanical performance of underground compressed air energy storage (CAES) in lined rock caverns

    E-Print Network [OSTI]

    Rutqvist, J.

    2013-01-01T23:59:59.000Z

    Williams, Compressed air energy storage: Theory, resources,for the compressed air energy storage technology by thefor compressed air energy storage power generation, Japan

  10. The roles of depth varying mechanical properties and permeability of the deep boundary condition in confined compression of articular cartilage

    E-Print Network [OSTI]

    Lee, John J.

    2011-01-01T23:59:59.000Z

    confined compression creep test of normal and proteoglycan-confined compression creep test of normal and proteoglycan-a stress-relaxation or creep test in confined compression,

  11. Attorney-Adviser (General)

    Broader source: Energy.gov [DOE]

    The Assistant General Counsel for General Law is responsible for providing legal review and general legal services to DOE with regard to matters involving: fiscal, personnel, labor relations,...

  12. Estimates of the Global Indirect Energy-Use Emission Impacts of USA Biofuel Policy

    SciTech Connect (OSTI)

    Oladosu, Gbadebo A [ORNL

    2012-01-01T23:59:59.000Z

    This paper evaluates the indirect energy-use emission implications of increases in the use of biofuels in the USA between 2001 and 2010 as mandates within a dynamic global computable general equilibrium model. The study incorporates explicit markets for biofuels, petroleum and other fossil fuels, and accounts for interactions among all sectors of an 18-region global economy. It considers bilateral trade, as well as the dynamics of capital allocation and investment. Simulation results show that the biofuel mandates in the USA generate an overall reduction in global energy use and emissions over the simulation period from 2001 to 2030. Consequently, the indirect energy-use emission change or emission leakage under the mandate is negative. That is, global emission reductions are larger than the direct emission savings from replacing petroleum with biofuels under the USA RFS2 over the last decade. Under our principal scenario this enhanced the direct emission reduction from biofuels by about 66%. The global change in lifecycle energy-use emissions for this scenario was estimated to be about 93 million tons of CO2e in 2010, 45 million tons of CO2e in 2020, and an increase of 5 million tons of CO2e in 2030, relative to the baseline scenario. Sensitivity results of six alternative scenarios provided additional insights into the pattern of the regional and global effects of biofuel mandates on energy-use emissions.

  13. Gyrokinetic Particle Simulation of Compressible Electromagnetic Turbulence in High-? Plasmas

    SciTech Connect (OSTI)

    Lin, Zhihong

    2014-03-13T23:59:59.000Z

    Supported by this award, the PI and his research group at the University of California, Irvine (UCI) have carried out computational and theoretical studies of instability, turbulence, and transport in laboratory and space plasmas. Several massively parallel, gyrokinetic particle simulation codes have been developed to study electromagnetic turbulence in space and laboratory plasmas. In space plasma projects, the simulation codes have been successfully applied to study the spectral cascade and plasma heating in kinetic Alfven wave turbulence, the linear and nonlinear properties of compressible modes including mirror instability and drift compressional mode, and the stability of the current sheet instabilities with finite guide field in the context of collisionless magnetic reconnection. The research results have been published in 25 journal papers and presented at many national and international conferences. Reprints of publications, source codes, and other research-related information are also available to general public on the PI’s webpage (http://phoenix.ps.uci.edu/zlin/). Two PhD theses in space plasma physics are highlighted in this report.

  14. Mesh Geometry Compression for Mobile Graphics Jongseok Lee

    E-Print Network [OSTI]

    Lee, Seungyong

    , for mobile graphics, API standards such as OpenGL ES and JSR-184 have been proposed [8], and the graphicsMesh Geometry Compression for Mobile Graphics Jongseok Lee POSTECH thirdeye@postech.ac.kr Sungyul--This paper presents a compression scheme for mesh geometry, which is suitable for mobile graphics. The main

  15. TIME-PERIODIC SOUND WAVE PROPAGATION COMPRESSIBLE EULER EQUATIONS

    E-Print Network [OSTI]

    A PARADIGM FOR TIME-PERIODIC SOUND WAVE PROPAGATION IN THE COMPRESSIBLE EULER EQUATIONS BLAKE consistent with time-periodic sound wave propagation in the 3 Ã? 3 nonlinear compressible Euler equations description of shock-free waves that propagate through an oscillating entropy field without breaking or dis

  16. Lossless Wavelet Based Image Compression with Adaptive 2D Decomposition

    E-Print Network [OSTI]

    Lossless Wavelet Based Image Compression with Adaptive 2D Decomposition Manfred Kopp Technical.kopp@ieee.org WWW: http://www.cg.tuwien.ac.at/~kopp/ Abstract 2D wavelets are usually generated from 1D wavelets wavelet functions based on the compression of the coefficients, but needs only the same number of 1D

  17. Techno-economic Performance Evaluation of Compressed Air

    E-Print Network [OSTI]

    PNNL-22235 Techno-economic Performance Evaluation of Compressed Air Energy Storage in the Pacific of Compressed Air Energy Storage in the Pacific Northwest BP McGrail JE Cabe CL Davidson FS Knudsen DH Bacon MD air energy storage (CAES) in the unique geologic setting of inland Washington and Oregon. The basic

  18. Recovery of partially occluded objects by applying compressive Fresnel holography

    E-Print Network [OSTI]

    Rosen, Joseph

    Recovery of partially occluded objects by applying compressive Fresnel holography Yair Rivenson,1, 2012; posted March 2, 2012 (Doc. ID 161160); published May 15, 2012 A compressive Fresnel holography, and is given by px. This may be regarded as a subsampling of the object's Fresnel field; hence the motivation

  19. Homogeneous Charge Compression Ignition: Formulation Effect of a Diesel Fuel

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Homogeneous Charge Compression Ignition: Formulation Effect of a Diesel Fuel on the Initiation and the Combustion Potential of Olefin Impact in a Diesel Base Fuel D. Alseda1,2, X. Montagne1 and P. Dagaut2 1 Compression Ignition: Formulation Effect of a Diesel Fuel on the Initiation and the Combustion - Potential

  20. Simplified Compression of Redundancy Free Trellis Sections in Turbo Decoder

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Simplified Compression of Redundancy Free Trellis Sections in Turbo Decoder Emmanuel Boutillon that for an M state Turbo decoder, among the L compressed trellis stages, only m = 3 or even m = 2 are necessary turbo-code and/or to reduce its power consumption.1 I. INTRODUCTION The quality of an error control code

  1. Video compression with 1-D directional transforms in H.264/AVC

    E-Print Network [OSTI]

    Kamisli, Fatih

    Typically the same transforms, such as the 2-D Discrete Cosine Transform (DCT), are used to compress both images in image compression and prediction residuals in video compression. However, these two signals have different ...

  2. Coding for Transmission Coding for Compression Bonus Section CMPSCI 240: Reasoning about Uncertainty

    E-Print Network [OSTI]

    McGregor, Andrew

    Coding for Transmission Coding for Compression Bonus Section CMPSCI 240: Reasoning about: April 29, 2014 #12;Coding for Transmission Coding for Compression Bonus Section Information Theory. #12;Coding for Transmission Coding for Compression Bonus Section Encoding Messages with Redundancy

  3. Coding for Transmission Coding for Compression Bonus Section CMPSCI 240: Reasoning about Uncertainty

    E-Print Network [OSTI]

    McGregor, Andrew

    Coding for Transmission Coding for Compression Bonus Section CMPSCI 240: Reasoning about 1, 2013 #12;Coding for Transmission Coding for Compression Bonus Section Information Theory Encoding for Transmission Coding for Compression Bonus Section Encoding Messages with Redundancy: Error Correcting Suppose

  4. Vacuum/Compression Valving (VCV) Using Parrafin-Wax on a Centrifugal Microfluidic CD Platform

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    Volume 8 | Issue 3 | e58523 Vacuum/Compression Valving (VCV)Vacuum/Compression Valving (VCV) Using Parrafin-Wax on aThis paper introduces novel vacuum/compression valves (VCVs)

  5. Correlation and image compression for limited-bandwidth CCD.

    SciTech Connect (OSTI)

    Thompson, Douglas G.

    2005-07-01T23:59:59.000Z

    As radars move to Unmanned Aerial Vehicles with limited-bandwidth data downlinks, the amount of data stored and transmitted with each image becomes more significant. This document gives the results of a study to determine the effect of lossy compression in the image magnitude and phase on Coherent Change Detection (CCD). We examine 44 lossy compression types, plus lossless zlib compression, and test each compression method with over 600 CCD image pairs. We also derive theoretical predictions for the correlation for most of these compression schemes, which compare favorably with the experimental results. We recommend image transmission formats for limited-bandwidth programs having various requirements for CCD, including programs which cannot allow performance degradation and those which have stricter bandwidth requirements at the expense of CCD performance.

  6. Seismic pore space compressibility and Gassmann`s relation

    SciTech Connect (OSTI)

    Mavko, G.; Mukerji, T. [Stanford Univ., CA (United States). Rock Physics Lab.] [Stanford Univ., CA (United States). Rock Physics Lab.

    1995-11-01T23:59:59.000Z

    The pore space compressibility of a rock provides a robust, model-independent descriptor of porosity and pore fluid effects on effective moduli. The pore space compressibility is also the direct physical link between the dry and fluid-saturated moduli, and is therefore the basis of Gassmann`s equation for fluid substitution. For a fixed porosity, an increase in pore space compressibility increase the sensitivity of the modulus to fluid substitution. Two simple techniques, based on pore compressibility, are presented for graphically applying Gassmann`s relation for fluid substitution. In the first method, the pore compressibility is simply reweighted with a factor that depends only on the ratio of fluid to mineral bulk modulus. In the second technique, the rock moduli are rescaled using the Reuss average, which again depends only on the fluid and mineral moduli.

  7. IN SITU ELLIPSOMETRY FOR SHOCK COMPRESSION MEASUREMENTS

    SciTech Connect (OSTI)

    Bakshi, L. [Mechanical Engineering Department, Ben Gurion University, Beer Sheva 84105 (Israel); Soreq NRC, Yavne 81800 (Israel); Eliezer, S.; Appelbaum, G.; Nissim, N.; Perelmutter, L. [Soreq NRC, Yavne 81800 (Israel); Mond, M. [Mechanical Engineering Department, Ben Gurion University, Beer Sheva 84105 (Israel)

    2009-12-28T23:59:59.000Z

    Knowledge about the optical properties of materials at high pressure and high temperature is needed for EOS research. Ellipsometry measures the change in the polarization of a probe beam reflected from a surface. From the change in polarization, the real and imaginary parts of the time dependent complex index of refraction can be extracted. From the measured optical properties, fundamental physical properties of the material, such as emissivity, phase transitions, and electrical conductivity can be extracted. A dynamic ellipsometry measurement system with nanosecond resolution was built in order to measure all four stocks parameters. Gas gun was used to accelerate the impact flyer. Our experiments concentrated on the optical properties of 1020 steel targets with impact pressure range of 40-250 kbar. Although there are intrinsic difficulties with dynamic ellipsometric measurements, distinct changes were observed for 1020 steel under shock compression larger than 130 kbar, the alpha->epsilon phase transition.

  8. Combustion dynamics in steady compressible flows

    E-Print Network [OSTI]

    S. Berti; D. Vergni; A. Vulpiani

    2008-07-03T23:59:59.000Z

    We study the evolution of a reactive field advected by a one-dimensional compressible velocity field and subject to an ignition-type nonlinearity. In the limit of small molecular diffusivity the problem can be described by a spatially discretized system, and this allows for an efficient numerical simulation. If the initial field profile is supported in a region of size l < lc one has quenching, i.e., flame extinction, where lc is a characteristic length-scale depending on the system parameters (reacting time, molecular diffusivity and velocity field). We derive an expression for lc in terms of these parameters and relate our results to those obtained by other authors for different flow settings.

  9. Seneca Compressed Air Energy Storage (CAES) Project

    SciTech Connect (OSTI)

    None

    2012-11-30T23:59:59.000Z

    This report provides a review and an analysis of potential environmental justice areas that could be affected by the New York State Electric & Gas (NYSEG) compress air energy storage (CAES) project and identifies existing environmental burden conditions on the area and evaluates additional burden of any significant adverse environmental impact. The review assesses the socioeconomic and demographic conditions of the area surrounding the proposed CAES facility in Schuyler County, New York. Schuyler County is one of 62 counties in New York. Schuyler County’s 2010 population of 18,343 makes it one of the least populated counties in the State (U.S. Census Bureau, 2010). This report was prepared for WorleyParsons by ERM and describes the study area investigated, methods and criteria used to evaluate this area, and the findings and conclusions from the evaluation.

  10. Quantum Bootstrapping via Compressed Quantum Hamiltonian Learning

    E-Print Network [OSTI]

    Nathan Wiebe; Christopher Granade; David G. Cory

    2015-03-30T23:59:59.000Z

    Recent work has shown that quantum simulation is a valuable tool for learning empirical models for quantum systems. We build upon these results by showing that a small quantum simulators can be used to characterize and learn control models for larger devices for wide classes of physically realistic Hamiltonians. This leads to a new application for small quantum computers: characterizing and controlling larger quantum computers. Our protocol achieves this by using Bayesian inference in concert with Lieb-Robinson bounds and interactive quantum learning methods to achieve compressed simulations for characterization. Whereas Fisher information analysis shows that current methods which employ short-time evolution are suboptimal, interactive quantum learning allows us to overcome this limitation. We illustrate the efficiency of our bootstrapping protocol by showing numerically that an 8-qubit Ising model simulator can be used to calibrate and control a 50 qubit Ising simulator while using only about 750 kilobits of experimental data.

  11. Shock compression of low-density foams

    SciTech Connect (OSTI)

    Holmes, N.C.

    1993-07-01T23:59:59.000Z

    Shock compression of very low density micro-cellular materials allows entirely new regimes of hot fluid states to be investigated experimentally. Using a two-stage light-gas gun to generate strong shocks, temperatures of several eV are readily achieved at densities of roughly 0.5--1 g/cm{sup 3} in large, uniform volumes. The conditions in these hot, expanded fluids are readily found using the Hugoniot jump conditions. We will briefly describe the basic methodology for sample preparation and experimental measurement of shock velocities. We present data for several materials over a range of initial densities. This paper will explore the applications of these methods for investigations of equations of state and phase diagrams, spectroscopy, and plasma physics. Finally, we discus the need for future work on these and related low-density materials.

  12. Hybrid Vapor Compression Adsorption System: Thermal Storage Using Hybrid Vapor Compression Adsorption System

    SciTech Connect (OSTI)

    None

    2012-01-04T23:59:59.000Z

    HEATS Project: UTRC is developing a new climate-control system for EVs that uses a hybrid vapor compression adsorption system with thermal energy storage. The targeted, closed system will use energy during the battery-charging step to recharge the thermal storage, and it will use minimal power to provide cooling or heating to the cabin during a drive cycle. The team will use a unique approach of absorbing a refrigerant on a metal salt, which will create a lightweight, high-energy-density refrigerant. This unique working pair can operate indefinitely as a traditional vapor compression heat pump using electrical energy, if desired. The project will deliver a hot-and-cold battery that provides comfort to the passengers using minimal power, substantially extending the driving range of EVs.

  13. High efficiency coarse-grained customised dynamically reconfigurable architecture for digital image processing and compression technologies 

    E-Print Network [OSTI]

    Zhao, Xin

    2012-06-25T23:59:59.000Z

    Digital image processing and compression technologies have significant market potential, especially the JPEG2000 standard which offers outstanding codestream flexibility and high compression ratio. Strong demand for ...

  14. EA-1752: Pacific Gas & Electric Company (PG&E), Compressed Air...

    Broader source: Energy.gov (indexed) [DOE]

    52: Pacific Gas & Electric Company (PG&E), Compressed Air Energy Storage (CAES) Compression Testing Phase Project, San Joaquin County, California EA-1752: Pacific Gas & Electric...

  15. Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed Natural Gas (CNG)-Powered Vehicles Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed...

  16. A Decision-Based Analysis of Compressed Air Usage Patterns in Automotive Manufacturing

    E-Print Network [OSTI]

    Yuan, Chris; Zhang, Teresa; Rangarajan, Arvind; Dornfeld, David; Ziemba, Bill; Whitbeck, Rod

    2006-01-01T23:59:59.000Z

    Air Usage Patterns in Automotive Manufacturing Chris Y. Yuanper vehicle built from automotive manufacturing facilities,2004). Compressed Air in Automotive Manufacturing Compressed

  17. Quantitative study of fluctuation effects by fast lattice Monte Carlo simulations: Compression of grafted homopolymers

    SciTech Connect (OSTI)

    Zhang, Pengfei; Wang, Qiang, E-mail: q.wang@colostate.edu [Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado 80523-1370 (United States)] [Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado 80523-1370 (United States)

    2014-01-28T23:59:59.000Z

    Using fast lattice Monte Carlo (FLMC) simulations [Q. Wang, Soft Matter 5, 4564 (2009)] and the corresponding lattice self-consistent field (LSCF) calculations, we studied a model system of grafted homopolymers, in both the brush and mushroom regimes, in an explicit solvent compressed by an impenetrable surface. Direct comparisons between FLMC and LSCF results, both of which are based on the same Hamiltonian (thus without any parameter-fitting between them), unambiguously and quantitatively reveal the fluctuations/correlations neglected by the latter. We studied both the structure (including the canonical-ensemble averages of the height and the mean-square end-to-end distances of grafted polymers) and thermodynamics (including the ensemble-averaged reduced energy density and the related internal energy per chain, the differences in the Helmholtz free energy and entropy per chain from the uncompressed state, and the pressure due to compression) of the system. In particular, we generalized the method for calculating pressure in lattice Monte Carlo simulations proposed by Dickman [J. Chem. Phys. 87, 2246 (1987)], and combined it with the Wang-Landau–Optimized Ensemble sampling [S. Trebst, D. A. Huse, and M. Troyer, Phys. Rev. E 70, 046701 (2004)] to efficiently and accurately calculate the free energy difference and the pressure due to compression. While we mainly examined the effects of the degree of compression, the distance between the nearest-neighbor grafting points, the reduced number of chains grafted at each grafting point, and the system fluctuations/correlations in an athermal solvent, the ?-solvent is also considered in some cases.

  18. LA-2271 CHEMISTRY-GENERAL

    Office of Scientific and Technical Information (OSTI)

    Ed. LOS ALAMOS SCIENTIFIC LABORATORY OF THE UNIVERSITY OF CALIFORNIA LOS ALAMOS NEW MEXICO REPORT WRITTEN: August 1958 REPORT DISTRIBUTED: March 17, 1959 COMPRESSIBILITY FACTORS...

  19. 2005 ASME Pressure Vessels and Piping Conference Denver, Colorado, USA

    E-Print Network [OSTI]

    Özer, Mutlu

    1 DRAFT 2005 ASME Pressure Vessels and Piping Conference Denver, Colorado, USA July 17-21, 2005 subjected to lateral earthquake loads. The results are verified with different codes (e.g. Eurocode8, API

  20. Chevron U.S.A. Inc.- 14-119-LNG

    Broader source: Energy.gov [DOE]

    The Office of Fossil Energy gives notice of receipt of an Application filed August 27, 2014 by Chevron U.S.A. Inc. (Chevron), requesting blanket authorization to export liquefied natural gas (LNG)...

  1. Smeg USA: Proposed Penalty (2011-CE-14/1909)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that Smeg USA, Inc. failed to certify a variety of dishwashers and refrigerators as compliant with the applicable energy conservation standards.

  2. De'Longhi USA: Order (2010-CE-2114)

    Broader source: Energy.gov [DOE]

    DOE issued an Order after entering into a Compromise Agreement with De'Longhi USA, Inc. to resolve a case involving the failure to certify that a variety of dehumidifiers comply with the applicable energy conservation standards.

  3. De'Longhi USA: Proposed Penalty (2010-CE-2114)

    Broader source: Energy.gov [DOE]

    DOE alleged in a Notice of Proposed Civil Penalty that De'Longhi USA, Inc. failed to certify a variety of dehumidifiers as compliant with the applicable energy conservation standards.

  4. atlanta georgia usa: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    values SECURING AMERICA'S FUTURE 12;0 1Georgia Tech Research Institute Annual Report Bennett, Gisele 9 School of Biology Atlanta, Georgia 30332-0230 USA Biology and Medicine...

  5. Designing Sustainability at BMW Group: The Designworks/USA Experience

    E-Print Network [OSTI]

    McElhaney, Kellie A; Toffel, Michael W.; Hill, Natalie

    2002-01-01T23:59:59.000Z

    SUSTAINABILITY MANAGEMENT: FROM BMW GROUP TO DESIGNWORKS/USAGuido Prick and Chris Bangle of BMW Group. In addition, weDesigning Sustainability at BMW Group: The Designworks/USA

  6. EFFECT OF COMPRESSION ON CONDUCTIVITY AND MORPHOLOGY OF PFSA MEMBRANES

    SciTech Connect (OSTI)

    Kusoglu, Ahmet; Weber, Adam; Jiang, Ruichin; Gittleman, Craig

    2011-07-20T23:59:59.000Z

    Polymer-Electrolyte-Fuel-Cells (PEFCs) are promising candidates for powering vehicles and portable devices using renewable-energy sources. The core of a PEFC is the solid electrolyte membrane that conducts protons from anode to cathode, where water is generated. The conductivity of the membrane, however, depends on the water content of the membrane, which is strongly related to the cell operating conditions. The membrane and other cell components are typically compressed to minimize various contact resistances. Moreover, the swelling of a somewhat constrained membrane in the cell due to the humidity changes generates additional compressive stresses in the membrane. These external stresses are balanced by the internal swelling pressure of the membrane and change the swelling equilibrium. It was shown using a fuel-cell setup that compression could reduce the water content of the membrane or alter the cell resistance. Nevertheless, the effect of compression on the membrane’s transport properties is yet to be understood, as well as its implications in the structure-functions relationships of the membrane. We previously studied, both experimentally and theoretically, how compression affects the water content of the membrane.6 However, more information is required the gain a fundamental understanding of the compression effects. In this talk, we present the results of our investigation on the in-situ conductivity of the membrane as a function of humidity and cell compression pressure. Moreover, to better understand the morphology of compressed membrane, small-angle X-ray-scattering (SAXS) experiments were performed. The conductivity data is then analyzed by investigating the size of the water domains of the compressed membrane determined from the SAXS measurements.

  7. Fish mercury distribution in Massachusetts, USA lakes

    SciTech Connect (OSTI)

    Rose, J.; Hutcheson, M.S.; West, C.R.; Pancorbo, O.; Hulme, K.; Cooperman, A.; DeCesare, G.; Isaac, R.; Screpetis, A.

    1999-07-01T23:59:59.000Z

    The sediment, water, and three species of fish from 24 of Massachusetts' (relatively) least-impacted water bodies were sampled to determine the patterns of variation in edible tissue mercury concentrations and the relationships of these patterns to characteristics of the water, sediment, and water bodies (lake, wetland, and watershed areas). Sampling was apportioned among three different ecological subregions and among lakes of differing trophic status. The authors sought to partition the variance to discover if these broadly defined concepts are suitable predictors of mercury levels in fish. Average muscle mercury concentrations were 0.15 mg/kg wet weight in the bottom-feeding brown bullheads (Ameriurus nebulosus); 0.31 mg/kg in the omnivorous yellow perch (Perca flavescens); and 0.39 mg/kg in the predaceous largemouth bass (Micropterus salmoides). Statistically significant differences in fish mercury concentrations between ecological subregions in Massachusetts, USA, existed only in yellow perch. The productivity level of the lakes (as deduced from Carlson's Trophic Status Index) was not a strong predictor of tissue mercury concentrations in any species. pH was a highly (inversely) correlated environmental variable with yellow perch and brown bullhead tissue mercury. Largemouth bass tissue mercury concentrations were most highly correlated with the weight of the fish (+), lake size (+), and source area sizes (+). Properties of individual lakes appear more important for determining fish tissue mercury concentrations than do small-scale ecoregional differences. Species that show major mercury variation with size or trophic level may not be good choices for use in evaluating the importance of environmental variables.

  8. Compression of solid nitromethane to 15 GPa at 298 K

    SciTech Connect (OSTI)

    Yarger, F.L.; Olinger, B.

    1986-08-01T23:59:59.000Z

    The measurement of the isothermal compression of solid nitromethane to 15 GPa at 298 K using high pressure x-ray diffraction techniques is described. The compression data are fit to a model from which bulk moduli are calculated. Most interesting are the linear compression data. The a axis direction, along which the C--N bonds are aligned, shows little increase in repulsion with increasing pressure above 5 GPa. This indicates that the nitro and methyl groups of neighboring molecules may be interacting.

  9. Stresses resulting from compression of bulk cotton lint fibers

    E-Print Network [OSTI]

    Chimbombi, Ezekiel Maswe

    1998-01-01T23:59:59.000Z

    MTS and Anthony's models 43 4. 2 Mean resilient force on the model bale per time FIGURE Page 4. 3 Ansys output of stress state in a compressed cotton bale 4. 4 Ansys output of state of strain in a compressed cotton bale 47 48 4. 5 Nodal forces... compressed bales is important so that it can be handled in the channels of trade (McCaskill and Anthony, 1977). Anthony et al. (1994) reported that the packaging system consists of a battery condenser, lint slide, lint feeder, tramper, bale press, and bale...

  10. The USA PATRIOT ACT and Government

    E-Print Network [OSTI]

    Redmiles, David F.

    , financial, mental health, and student records with minimal judicial oversight. Allows FBI Agents General Guidelines allow FBI spying on religious and political organizations and individuals without COINTELPRO-type programs of the `50's, `60's, and `70's, where the FBI sought to disrupt and discredit

  11. Improved Grammar-Based Compressed Indexes

    E-Print Network [OSTI]

    Claude, Francisco

    2011-01-01T23:59:59.000Z

    We introduce the first grammar-compressed representation of a sequence that supports searches in time that depends only logarithmically on the size of the grammar. Given a text $T[1..u]$ that is represented by a (context-free) grammar of $n$ (terminal and nonterminal) symbols and size $N$ (measured as the sum of the lengths of the right hands of the rules), a basic grammar-based representation of $T$ takes $N\\lg n$ bits of space. Our representation requires $2N\\lg n + N\\lg u + \\epsilon\\, n\\lg n + o(N\\lg n)$ bits of space, for any $0<\\epsilon \\le 1$. It can find the positions of the $occ$ occurrences of a pattern of length $m$ in $T$ in $O((m^2/\\epsilon)\\lg (\\frac{\\lg u}{\\lg n}) +occ\\lg n)$ time, and extract any substring of length $\\ell$ of $T$ in time $O(\\ell+h\\lg(N/h))$, where $h$ is the height of the grammar tree.

  12. Analytical bunch compression studies for FLUTE

    E-Print Network [OSTI]

    Schreck, M

    2014-01-01T23:59:59.000Z

    The current article deals with analytical bunch compression studies for FLUTE whose results are compared to simulations. FLUTE is a linac-based electron accelerator with a design energy of approximately 40 MeV currently being constructed at the Karlsruhe Institute of Technology. One of the goals of FLUTE is to generate electron bunches with their length lying in the femtosecond regime. In the first phase this will be accomplished using a magnetic bunch compressor. This compressor forms the subject of the studies presented. The paper is divided into three parts. The first part deals with pure geometric investigations of the bunch compressor where space charge effects and the back reaction of bunches with coherent synchrotron radiation (CSR) are neglected. The second part is dedicated to the treatment of space charge effects and the third part gives some analytical results on the emission of CSR. The upshot is that the results of the first and the third part agree quite well with what is obtained from simulatio...

  13. Effect of Compressibility on the Annihilation Process

    E-Print Network [OSTI]

    Michal Hnati?; Juha Honkonen; Tomáš Lu?ivjanský

    2013-02-01T23:59:59.000Z

    Annihilation processes, where the reacting particles are influenced by some external advective field, are one of the simplest examples of nonlinear statistical systems. This type of processes can be observed in miscellaneous chemical, biological or physical systems. In low space dimensions usual description by means of kinetic rate equation is not sufficient and the effect of density fluctuations must be taken into ac- count. Using perturbative renormalization group we study the influ- ence of random velocity field on the kinetics of single-species annihila- tion reaction at and below its critical dimension $d_c = 2$. The advecting velocity field is modelled by the self-similar in space Gaussian variable finite correlated in time (Antonov-Kraichnan model). Effect of the compressibility of velocity field is taken into account and the model is analyzed near its critical dimension by means of three-parameter expansion in $\\epsilon$, $\\Delta$ and $\\eta$. Here $\\epsilon$ is the deviation from the Kolmogorov scaling, $\\Delta$ is the deviation from the (critical) space dimension 2 and {\\eta} is the deviation from the parabolic dispersion law. Depending on the value of these exponents and the value of compressiblity parameter {\\alpha}, the studied model can exhibit various asymptotic (long-time) regimes corresponding to the infrared (IR) fixed points of the renormalization group. The possible regimes are summarized and the decay rates for the mean particle number are calculated in the leading order of the perturbation theory.

  14. Fuel effects in homogeneous charge compression ignition (HCCI) engines

    E-Print Network [OSTI]

    Angelos, John P. (John Phillip)

    2009-01-01T23:59:59.000Z

    Homogenous-charge, compression-ignition (HCCI) combustion is a new method of burning fuel in internal combustion (IC) engines. In an HCCI engine, the fuel and air are premixed prior to combustion, like in a spark-ignition ...

  15. Global Inference for Sentence Compression: An Integer Linear Programming Approach 

    E-Print Network [OSTI]

    Clarke, James

    2008-01-01T23:59:59.000Z

    In this thesis we develop models for sentence compression. This text rewriting task has recently attracted a lot of attention due to its relevance for applications (e.g., summarisation) and simple formulation by means ...

  16. Energy efficiency improvements in Chinese compressed air systems

    E-Print Network [OSTI]

    McKane, Aimee; Li, Li; Li, Yuqi; Taranto, T.

    2008-01-01T23:59:59.000Z

    system pressure problem because VSD compressors are able toproblems, the enterprise should first consider whether the existing array of compressorsproblems When enterprises focus their attention on their compressed air system, it is mainly on the compressors.

  17. Weak-strong clustering transition in renewing compressible flows

    E-Print Network [OSTI]

    Ajinkya Dhanagare; Stefano Musacchio; Dario Vincenzi

    2014-11-01T23:59:59.000Z

    We investigate the statistical properties of Lagrangian tracers transported by a time-correlated compressible renewing flow. We show that the preferential sampling of the phase space performed by tracers yields significant differences between the Lagrangian statistics and its Eulerian counterpart. In particular, the effective compressibility experienced by tracers has a non-trivial dependence on the time correlation of the flow. We examine the consequence of this phenomenon on the clustering of tracers, focusing on the transition from the weak- to the strong-clustering regime. We find that the critical compressibility at which the transition occurs is minimum when the time correlation of the flow is of the order of the typical eddy turnover time. Further, we demonstrate that the clustering properties in time-correlated compressible flows are non-universal and are strongly influenced by the spatio-temporal structure of the velocity field.

  18. High compression ratio turbo gasoline engine operation using alcohol enhancement

    E-Print Network [OSTI]

    Lewis, Raymond (Raymond A.)

    2013-01-01T23:59:59.000Z

    Gasoline - ethanol blends were explored as a strategy to mitigate engine knock, a phenomena in spark ignition engine combustion when a portion of the end gas is compressed to the point of spontaneous auto-ignition. This ...

  19. Algorithms for transform selection in multiple-transform video compression

    E-Print Network [OSTI]

    Cai, Xun, S.M. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    Selecting proper transforms for video compression has been based on the rate-distortion criterion. Transforms that appear reasonable are incorporated into a video coding system and their performance is evaluated. This ...

  20. Copper laser modulator driving assembly including a magnetic compression laser

    DOE Patents [OSTI]

    Cook, Edward G. (Livermore, CA); Birx, Daniel L. (Oakley, CA); Ball, Don G. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    A laser modulator (10) having a low voltage assembly (12) with a plurality of low voltage modules (14) with first stage magnetic compression circuits (20) and magnetic assist inductors (28) with a common core (91), such that timing of the first stage magnetic switches (30b) is thereby synchronized. A bipolar second stage of magnetic compression (42) is coupled to the low voltage modules (14) through a bipolar pulse transformer (36) and a third stage of magnetic compression (44) is directly coupled to the second stage of magnetic compression (42). The low voltage assembly (12) includes pressurized boxes (117) for improving voltage standoff between the primary winding assemblies (34) and secondary winding (40) contained therein.

  1. Benefits and Drawbacks of Compression Ratio Reduction in PCCI...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    effect of compression ratio on performance of light duty diesel operating with PCCI calibration, near EURO6Tier 2 Bin 5 NOx limits. deer08beatrice.pdf More Documents &...

  2. Pre-In-Plant Training Webinar (Compressed Air)

    Broader source: Energy.gov [DOE]

    This pre-In-Plant training webinar for the Better Plants Program covers the basics of finding energy savings in Compressed Air systems and introduces the AIRMaster+ software tool.

  3. Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons...

    Broader source: Energy.gov (indexed) [DOE]

    U. S. Department of Transportation and U.S. Department of Energy Compressed Natural Gas and Hydrogen Fuels: Lessons Learned for the Safe Deployment of Vehicles December 10-11,...

  4. Outphasing Energy Recovery Amplifier With Resistance Compression for Improved Efficiency

    E-Print Network [OSTI]

    Godoy, Philip Andrew

    We describe a new outphasing energy recovery amplifier (OPERA) which replaces the isolation resistor in the conventional matched combiner with a resistance-compressed rectifier for improved efficiency. The rectifier recovers ...

  5. Compressibility of Nuclear Matter from Shell Effects in Nuclei

    E-Print Network [OSTI]

    M. M. Sharma

    1999-04-13T23:59:59.000Z

    The compressibility of nuclear matter has received significant attention in the last decade and a variety of approaches have been employed to extract this fundamental property of matter. Recently, significant differences have emerged between the results of relativistic and non-relativistic calculations of breathing mode giant monopole resonance (GMR). This is due to a lack of understanding of the dynamics of GMR and of its exact relationship to the compression modulus of the infinite nuclear matter. Here, I present an alternative approach based upon nuclear shell effects. The shell effects are known to manifest experimentally in terms of particle-separation energies with an exceedingly high precision. Within the framework of the non-relativistic density-dependent Skyrme theory, it is shown that the compressibility of nuclear matter has a significant influence on shell effects in nuclei. It is shown that 2-neutron separation energies and hence the empirical shell effects can be used to constrain the compressibility of nuclear matter.

  6. A Space-Charge-Neutralizing Plasma for Beam Drift Compression

    E-Print Network [OSTI]

    Roy, P.K.

    2008-01-01T23:59:59.000Z

    beam drift compression P. K. Roy , P. A. Seidl , A. Anders ,45, 131 (2005). [3] P. K. Roy et al. , NIMA 544, 225 (the PAC05, p.4006. [10] P. K. Roy et al. , PRL, 95, (2005),

  7. Representation and compression of multidimensional piecewise functions using surflets

    E-Print Network [OSTI]

    Chandrasekaran, Venkat

    We study the representation, approximation, and compression of functions in M dimensions that consist of constant or smooth regions separated by smooth (M-1)-dimensional discontinuities. Examples include images containing ...

  8. Statistical Models for Images: Compression, Restoration and Synthesis

    E-Print Network [OSTI]

    Simoncelli, Eero

    /or nonlinear transfor­ mations, into statistically independent components. The classical approach, and the Sloan Center for Theoretical Neurobiology at NYU. 1. Wavelet Marginal Statistical Model Recently, multiStatistical Models for Images: Compression, Restoration and Synthesis Eero P. Simoncelli Center

  9. Business Case for Compressed Natural Gas in Municipal Fleets

    SciTech Connect (OSTI)

    Johnson, C.

    2010-06-01T23:59:59.000Z

    This report describes how NREL used the CNG Vehicle and Infrastructure Cash-Flow Evaluation (VICE) model to establish guidance for fleets making decisions about using compressed natural gas.

  10. Weak-strong clustering transition in renewing compressible flows

    E-Print Network [OSTI]

    Dhanagare, Ajinkya; Vincenzi, Dario

    2014-01-01T23:59:59.000Z

    We investigate the statistical properties of Lagrangian tracers transported by a time-correlated compressible renewing flow. We show that the preferential sampling of the phase space performed by tracers yields significant differences between the Lagrangian statistics and its Eulerian counterpart. In particular, the effective compressibility experienced by tracers has a non-trivial dependence on the time correlation of the flow. We examine the consequence of this phenomenon on the clustering of tracers, focusing on the transition from the weak- to the strong-clustering regime. We find that the critical compressibility at which the transition occurs is minimum when the time correlation of the flow is of the order of the typical eddy turnover time. Further, we demonstrate that the clustering properties in time-correlated compressible flows are non-universal and are strongly influenced by the spatio-temporal structure of the velocity field.

  11. Grid adaptation for functional outputs of compressible flow simulations

    E-Print Network [OSTI]

    Venditti, David Anthony, 1973-

    2002-01-01T23:59:59.000Z

    An error correction and grid adaptive method is presented for improving the accuracy of functional outputs of compressible flow simulations. The procedure is based on an adjoint formulation in which the estimated error in ...

  12. Mission Design for Compressive Sensing with Mobile Robots

    E-Print Network [OSTI]

    Hummel, Robert

    This paper considers mission design strategies for mobile robots whose task is to perform spatial sampling of a static environmental field, in the framework of compressive sensing. According to this theory, we can reconstruct ...

  13. DISPROPORTIONATION RESISTANT ALLOY DEVELOPMENT FOR HYDRIDE HYDROGEN COMPRESSION

    E-Print Network [OSTI]

    of the thermal compression process. However, many applications either do not have adequate waste heat, or the waste heat is difficult to access economically. In these cases, traditional fuels can be used to provide

  14. Two-phase compressibility factors for retrograde gases

    E-Print Network [OSTI]

    Rayes, Daniel George

    1989-01-01T23:59:59.000Z

    of a liquid phase. Gas compressibility factors are used in the gas material balance equations. These equations are used to estimate initial gas in place and reserves. Normally gas compressibility factors are used when a reservoir fluid depletion.... 0 on a material balance plot. Dake's equation has limited usefulness because the initial gas in place G is an unknown in the field. Also note that Gp at the abandonment pressure is the ultimate reserves of the reservoir. We can also derive...

  15. Optimized Node Selection for Compressive Sleeping Wireless Sensor Networks

    E-Print Network [OSTI]

    Chen, Wei; Wassell, Ian J.

    2015-02-05T23:59:59.000Z

    1Optimized Node Selection for Compressive Sleeping Wireless Sensor Networks Wei Chen, Member, IEEE, and Ian J. Wassell Abstract—In this paper, we propose an active node selection framework for compressive sleeping wireless sensor networks (WSNs... development oftechnologies in sensing, computing and communication has made it possible to employ wireless sensor networks (WSNs) to continuously monitor physical phenomena in a variety of applications, for example air quality monitoring, wildlife tracking...

  16. Compression induced delamination in a unidirectional graphite/epoxy composite 

    E-Print Network [OSTI]

    Earley, John W.

    1981-01-01T23:59:59.000Z

    December 1981 Major Subject: Civil Engineering COMPRESSION INDUCED DELAMINATION IN A UNIDIRECTIONAL GRAPHITE/EPOXY COMPOSITE A Thesis by JOHN W. EARLEY Approved as to style and content by: (K. L. Jerina, Chairman) (R, A. Schape y', MemP ) W. L.... Bradley, Me er Il. 8 0 1d, O. pa t~tH d December 1981 ABSTRACT Compression Induced Delamination in a Unidirectional Graphite/Epoxy Composite (December 1981) John William Earley, B. S. Aeronautical Engineering California Polytechnic State University...

  17. Efficiency of compressed-air systems. Final report

    SciTech Connect (OSTI)

    Not Available

    1983-01-01T23:59:59.000Z

    The program undertaken by this contract is intended to quantify the current state of knowledge in American industry concerning the energy efficient design and operation of industrial compressed air systems and system components. Since there is no standard reference for designers and operators of compressed air systems which provides guidelines for maximizing the energy efficiency of these systems, a major product of this contract was the preparation of a guidebook for this purpose.

  18. The effect of neutralization on compressive strength of stabilized phosphogypsum 

    E-Print Network [OSTI]

    Yung, Chung Che

    1985-01-01T23:59:59.000Z

    36 38 38 49 CONCLUSIONS AND RECQMMENDATIQNS 73 ' REFERENCES . APPENDIX A. APPENDIX B. APPENDIX C. APPENDIX D. IAFIQRATORY PROCEDURES FOR DETERMINING CaO CONTENT IN FLY ASH ~ ~ ~ DATA FROM PHASE I ~ ~ ~ IABORATORY PROCEDURES... . of neutralization using calcium hydroxide of neutralization using reclaimed fly ash 41 45 46 47 48 13 14 15 Three&ay unconf ined compressive strength versus phosphogypsum pB Seven-day unconfined compressive strength versus phosphogypsum pH Twentymight...

  19. SCADA Protocol Anomaly Detection Utilizing Compression (SPADUC) 2013

    SciTech Connect (OSTI)

    Gordon Rueff; Lyle Roybal; Denis Vollmer

    2013-01-01T23:59:59.000Z

    There is a significant need to protect the nation’s energy infrastructures from malicious actors using cyber methods. Supervisory, Control, and Data Acquisition (SCADA) systems may be vulnerable due to the insufficient security implemented during the design and deployment of these control systems. This is particularly true in older legacy SCADA systems that are still commonly in use. The purpose of INL’s research on the SCADA Protocol Anomaly Detection Utilizing Compression (SPADUC) project was to determine if and how data compression techniques could be used to identify and protect SCADA systems from cyber attacks. Initially, the concept was centered on how to train a compression algorithm to recognize normal control system traffic versus hostile network traffic. Because large portions of the TCP/IP message traffic (called packets) are repetitive, the concept of using compression techniques to differentiate “non-normal” traffic was proposed. In this manner, malicious SCADA traffic could be identified at the packet level prior to completing its payload. Previous research has shown that SCADA network traffic has traits desirable for compression analysis. This work investigated three different approaches to identify malicious SCADA network traffic using compression techniques. The preliminary analyses and results presented herein are clearly able to differentiate normal from malicious network traffic at the packet level at a very high confidence level for the conditions tested. Additionally, the master dictionary approach used in this research appears to initially provide a meaningful way to categorize and compare packets within a communication channel.

  20. 2015 - LNG Export, Compressed Natural Gas (CNG), Re-Exports ...

    Broader source: Energy.gov (indexed) [DOE]

    No. Date Filed ImportExport Country Applicant Dkt. Index F.R. Notice Order No. 15-13-LNG 1212015 Re-export FTA ENI USA Gas Marketing LLC Dkt. Index 80 FR 13841 Pending...

  1. System using data compression and hashing adapted for use for multimedia encryption

    DOE Patents [OSTI]

    Coffland, Douglas R. (Livermore, CA)

    2011-07-12T23:59:59.000Z

    A system and method is disclosed for multimedia encryption. Within the system of the present invention, a data compression module receives and compresses a media signal into a compressed data stream. A data acquisition module receives and selects a set of data from the compressed data stream. And, a hashing module receives and hashes the set of data into a keyword. The method of the present invention includes the steps of compressing a media signal into a compressed data stream; selecting a set of data from the compressed data stream; and hashing the set of data into a keyword.

  2. Selective document image data compression technique

    DOE Patents [OSTI]

    Fu, C.Y.; Petrich, L.I.

    1998-05-19T23:59:59.000Z

    A method of storing information from filled-in form-documents comprises extracting the unique user information in the foreground from the document form information in the background. The contrast of the pixels is enhanced by a gamma correction on an image array, and then the color value of each of pixel is enhanced. The color pixels lying on edges of an image are converted to black and an adjacent pixel is converted to white. The distance between black pixels and other pixels in the array is determined, and a filled-edge array of pixels is created. User information is then converted to a two-color format by creating a first two-color image of the scanned image by converting all pixels darker than a threshold color value to black. All the pixels that are lighter than the threshold color value to white. Then a second two-color image of the filled-edge file is generated by converting all pixels darker than a second threshold value to black and all pixels lighter than the second threshold color value to white. The first two-color image and the second two-color image are then combined and filtered to smooth the edges of the image. The image may be compressed with a unique Huffman coding table for that image. The image file is also decimated to create a decimated-image file which can later be interpolated back to produce a reconstructed image file using a bilinear interpolation kernel. 10 figs.

  3. Compressed Air Energy Savings: SAV-AIR Monitor and Control System and the PNW Compressed Air Challenge

    E-Print Network [OSTI]

    Anderson, K. J.; Annen, B.; Scott, S.

    year in compressed air energy costs. Their system included three older oil-flooded screw compressors two 25-horsepower (HP) and one 75 -HP. Although 100-HP ofcompressor was running continuously, it was having trouble providing enough air... such as improperly installed or leaking distribution lines, outdated or inadequate controls, and excess compressor capacity. But efficiency improvements and speed controls could save over [7%. In the Pacific Northwest (PNW) compressed air systems consumed 4...

  4. Energy recovery during expansion of compressed gas using power plant low-quality heat sources

    DOE Patents [OSTI]

    Ochs, Thomas L. (Albany, OR); O'Connor, William K. (Lebanon, OR)

    2006-03-07T23:59:59.000Z

    A method of recovering energy from a cool compressed gas, compressed liquid, vapor, or supercritical fluid is disclosed which includes incrementally expanding the compressed gas, compressed liquid, vapor, or supercritical fluid through a plurality of expansion engines and heating the gas, vapor, compressed liquid, or supercritical fluid entering at least one of the expansion engines with a low quality heat source. Expansion engines such as turbines and multiple expansions with heating are disclosed.

  5. Real-Time SCADA Cyber Protection Using Compression Techniques

    SciTech Connect (OSTI)

    Lyle G. Roybal; Gordon H Rueff

    2013-11-01T23:59:59.000Z

    The Department of Energy’s Office of Electricity Delivery and Energy Reliability (DOE-OE) has a critical mission to secure the energy infrastructure from cyber attack. Through DOE-OE’s Cybersecurity for Energy Delivery Systems (CEDS) program, the Idaho National Laboratory (INL) has developed a method to detect malicious traffic on Supervisory, Control, and Data Acquisition (SCADA) network using a data compression technique. SCADA network traffic is often repetitive with only minor differences between packets. Research performed at the INL showed that SCADA network traffic has traits desirable for using compression analysis to identify abnormal network traffic. An open source implementation of a Lempel-Ziv-Welch (LZW) lossless data compression algorithm was used to compress and analyze surrogate SCADA traffic. Infected SCADA traffic was found to have statistically significant differences in compression when compared against normal SCADA traffic at the packet level. The initial analyses and results are clearly able to identify malicious network traffic from normal traffic at the packet level with a very high confidence level across multiple ports and traffic streams. Statistical differentiation between infected and normal traffic level was possible using a modified data compression technique at the 99% probability level for all data analyzed. However, the conditions tested were rather limited in scope and need to be expanded into more realistic simulations of hacking events using techniques and approaches that are better representative of a real-world attack on a SCADA system. Nonetheless, the use of compression techniques to identify malicious traffic on SCADA networks in real time appears to have significant merit for infrastructure protection.

  6. Word aligned bitmap compression method, data structure, and apparatus

    DOE Patents [OSTI]

    Wu, Kesheng; Shoshani, Arie; Otoo, Ekow

    2004-12-14T23:59:59.000Z

    The Word-Aligned Hybrid (WAH) bitmap compression method and data structure is a relatively efficient method for searching and performing logical, counting, and pattern location operations upon large datasets. The technique is comprised of a data structure and methods that are optimized for computational efficiency by using the WAH compression method, which typically takes advantage of the target computing system's native word length. WAH is particularly apropos to infrequently varying databases, including those found in the on-line analytical processing (OLAP) industry, due to the increased computational efficiency of the WAH compressed bitmap index. Some commercial database products already include some version of a bitmap index, which could possibly be replaced by the WAH bitmap compression techniques for potentially increased operation speed, as well as increased efficiencies in constructing compressed bitmaps. Combined together, this technique may be particularly useful for real-time business intelligence. Additional WAH applications may include scientific modeling, such as climate and combustion simulations, to minimize search time for analysis and subsequent data visualization.

  7. A comparative analysis of the cryo-compression and cryo-adsorption hydrogen storage methods

    SciTech Connect (OSTI)

    Petitpas, G [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Benard, P [Universite du Quebec a Trois-Rivieres (Canada); Klebanoff, L E [Sandia National Lab. (SNL-CA), Livermore, CA (United States); Xiao, J [Universite du Quebec a Trois-Rivieres (Canada); Aceves, S M [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2014-07-01T23:59:59.000Z

    While conventional low-pressure LH? dewars have existed for decades, advanced methods of cryogenic hydrogen storage have recently been developed. These advanced methods are cryo-compression and cryo-adsorption hydrogen storage, which operate best in the temperature range 30–100 K. We present a comparative analysis of both approaches for cryogenic hydrogen storage, examining how pressure and/or sorbent materials are used to effectively increase onboard H? density and dormancy. We start by reviewing some basic aspects of LH? properties and conventional means of storing it. From there we describe the cryo-compression and cryo-adsorption hydrogen storage methods, and then explore the relationship between them, clarifying the materials science and physics of the two approaches in trying to solve the same hydrogen storage task (~5–8 kg H?, typical of light duty vehicles). Assuming that the balance of plant and the available volume for the storage system in the vehicle are identical for both approaches, the comparison focuses on how the respective storage capacities, vessel weight and dormancy vary as a function of temperature, pressure and type of cryo-adsorption material (especially, powder MOF-5 and MIL-101). By performing a comparative analysis, we clarify the science of each approach individually, identify the regimes where the attributes of each can be maximized, elucidate the properties of these systems during refueling, and probe the possible benefits of a combined “hybrid” system with both cryo-adsorption and cryo-compression phenomena operating at the same time. In addition the relationships found between onboard H? capacity, pressure vessel and/or sorbent mass and dormancy as a function of rated pressure, type of sorbent material and fueling conditions are useful as general designing guidelines in future engineering efforts using these two hydrogen storage approaches.

  8. Compressive strength of concrete and mortar containing fly ash

    DOE Patents [OSTI]

    Liskowitz, John W. (Belle Mead, NJ); Wecharatana, Methi (Parsippany, NJ); Jaturapitakkul, Chai (Bangkok, TH); Cerkanowicz, deceased, Anthony E. (late of Livingston, NJ)

    1997-01-01T23:59:59.000Z

    The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specifications required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs.

  9. Compressive strength of concrete and mortar containing fly ash

    DOE Patents [OSTI]

    Liskowitz, J.W.; Wecharatana, M.; Jaturapitakkul, C.; Cerkanowicz, A.E.

    1997-04-29T23:59:59.000Z

    The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specifications required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs. 33 figs.

  10. Compressive strength of concrete and mortar containing fly ash

    DOE Patents [OSTI]

    Liskowitz, John W. (Belle Mead, NJ); Wecharatana, Methi (Parsippany, NJ); Jaturapitakkul, Chai (Bangkok, TH); Cerkanowicz, deceased, Anthony E. (late of Livingston, NJ)

    1998-01-01T23:59:59.000Z

    The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specification required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs.

  11. Compressive strength of concrete and mortar containing fly ash

    DOE Patents [OSTI]

    Liskowitz, J.W.; Wecharatana, M.; Jaturapitakkul, C.; Cerkanowicz, A.E.

    1998-12-29T23:59:59.000Z

    The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specification required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs. 33 figs.

  12. Gas turbine power plant with supersonic shock compression ramps

    DOE Patents [OSTI]

    Lawlor, Shawn P. (Bellevue, WA); Novaresi, Mark A. (San Diego, CA); Cornelius, Charles C. (Kirkland, WA)

    2008-10-14T23:59:59.000Z

    A gas turbine engine. The engine is based on the use of a gas turbine driven rotor having a compression ramp traveling at a local supersonic inlet velocity (based on the combination of inlet gas velocity and tangential speed of the ramp) which compresses inlet gas against a stationary sidewall. The supersonic compressor efficiently achieves high compression ratios while utilizing a compact, stabilized gasdynamic flow path. Operated at supersonic speeds, the inlet stabilizes an oblique/normal shock system in the gasdynamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by use of a lean pre-mix system, a pre-swirl compressor, and a bypass stream to bleed a portion of the gas after passing through the pre-swirl compressor to the combustion gas outlet. Use of a stationary low NOx combustor provides excellent emissions results.

  13. Indentation size effect and the plastic compressibility of glass

    SciTech Connect (OSTI)

    Smedskjaer, Morten M., E-mail: mos@bio.aau.dk [Section of Chemistry, Aalborg University, 9000 Aalborg (Denmark)

    2014-06-23T23:59:59.000Z

    Oxide glasses exhibit significant densification under an applied isostatic pressure at the glass transition temperature. The glass compressibility is correlated with the chemical composition and atomic packing density, e.g., borate glasses with planar triangular BO{sub 3} units are more disposed for densification than silicate glasses with tetrahedral units. We here show that there is a direct relation between the plastic compressibility following hot isostatic compression and the extent of the indentation size effect (ISE), which is the decrease of hardness with indentation load exhibited by most materials. This could suggest that the ISE is correlated with indentation-induced shear bands, which should form in greater density when the glass network is more adaptable to volume changes through structural and topological rearrangements under an applied pressure.

  14. The FBI compression standard for digitized fingerprint images

    SciTech Connect (OSTI)

    Brislawn, C.M.; Bradley, J.N. [Los Alamos National Lab., NM (United States); Onyshczak, R.J. [National Inst. of Standards and Technology, Gaithersburg, MD (United States); Hopper, T. [Federal Bureau of Investigation, Washington, DC (United States)

    1996-10-01T23:59:59.000Z

    The FBI has formulated national standards for digitization and compression of gray-scale fingerprint images. The compression algorithm for the digitized images is based on adaptive uniform scalar quantization of a discrete wavelet transform subband decomposition, a technique referred to as the wavelet/scalar quantization method. The algorithm produces archival-quality images at compression ratios of around 15 to 1 and will allow the current database of paper fingerprint cards to be replaced by digital imagery. A compliance testing program is also being implemented to ensure high standards of image quality and interchangeability of data between different implementations. We will review the current status of the FBI standard, including the compliance testing process and the details of the first-generation encoder.

  15. Generalized concatenated quantum codes

    E-Print Network [OSTI]

    Grassl, Markus

    We discuss the concept of generalized concatenated quantum codes. This generalized concatenation method provides a systematical way for constructing good quantum codes, both stabilizer codes and nonadditive codes. Using ...

  16. Beam dynamics of the Neutralized Drift Compression Experiment-II (NDCX-II), a novel pulse-compressing ion accelerator

    SciTech Connect (OSTI)

    Friedman, A; Barnard, J J; Cohen, R H; Grote, D P; Lund, S M; Sharp, W M; Faltens, A; Henestroza, E; Jung, J; Kwan, J W; Lee, E P; Leitner, M A; Logan, B G; Vay, J; Waldron, W L; Davidson, R C; Dorf, M; Gilson, E P; Kaganovich, I

    2009-11-19T23:59:59.000Z

    Intense beams of heavy ions are well suited for heating matter to regimes of emerging interest. A new facility, NDCX-II, will enable studies of warm dense matter at {approx}1 eV and near-solid density, and of heavy-ion inertial fusion target physics relevant to electric power production. For these applications the beam must deposit its energy rapidly, before the target can expand significantly. To form such pulses, ion beams are temporally compressed in neutralizing plasma; current amplification factors of {approx}50-100 are routinely obtained on the Neutralized Drift Compression Experiment (NDCX) at LBNL. In the NDCX-II physics design, an initial non-neutralized compression renders the pulse short enough that existing high-voltage pulsed power can be employed. This compression is first halted and then reversed by the beam's longitudinal space-charge field. Downstream induction cells provide acceleration and impose the head-to-tail velocity gradient that leads to the final neutralized compression onto the target. This paper describes the discrete-particle simulation models (1-D, 2-D, and 3-D) employed and the space-charge-dominated beam dynamics being realized.

  17. Beam dynamics of the Neutralized Drift Compression Experiment-II (NDCX-II),a novel pulse-compressing ion accelerator

    SciTech Connect (OSTI)

    Friedman, A.; Barnard, J.J.; Cohen, R.H.; Grote, D.P.; Lund, S.M.; Sharp, W.M.; Faltens, A.; Henestroza, E.; Jung, J.-Y.; Kwan, J.W.; Lee, E.P.; Leitner, M.A.; Logan, B.G.; Vay, J.-L.; Waldron, W.L.; Davidson, R.C.; Dorf, M.; Gilson, E.P.; Kaganovich, I.D.

    2009-12-19T23:59:59.000Z

    Intense beams of heavy ions are well suited for heating matter to regimes of emerging interest. A new facility, NDCX-II, will enable studies of warm dense matter at {approx}1 eV and near-solid density, and of heavy-ion inertial fusion target physics relevant to electric power production. For these applications the beam must deposit its energy rapidly, before the target can expand significantly. To form such pulses, ion beams are temporally compressed in neutralizing plasma; current amplification factors of {approx}50-100 are routinely obtained on the Neutralized Drift Compression Experiment (NDCX) at LBNL. In the NDCX-II physics design, an initial non-neutralized compression renders the pulse short enough that existing high-voltage pulsed power can be employed. This compression is first halted and then reversed by the beam's longitudinal space-charge field. Downstream induction cells provide acceleration and impose the head-to-tail velocity gradient that leads to the final neutralized compression onto the target. This paper describes the discrete-particle simulation models (1-D, 2-D, and 3-D) employed and the space-charge-dominated beam dynamics being realized.

  18. Spatial compression algorithm for the analysis of very large multivariate images

    DOE Patents [OSTI]

    Keenan, Michael R. (Albuquerque, NM)

    2008-07-15T23:59:59.000Z

    A method for spatially compressing data sets enables the efficient analysis of very large multivariate images. The spatial compression algorithms use a wavelet transformation to map an image into a compressed image containing a smaller number of pixels that retain the original image's information content. Image analysis can then be performed on a compressed data matrix consisting of a reduced number of significant wavelet coefficients. Furthermore, a block algorithm can be used for performing common operations more efficiently. The spatial compression algorithms can be combined with spectral compression algorithms to provide further computational efficiencies.

  19. ORIGINAL PAPER Geochemical Evolution of Great Salt Lake, Utah, USA

    E-Print Network [OSTI]

    , USA, is the largest saline lake in North America, and its brines are some of the most concentrated and mirabilite, have periodically modified lake-brine chemistry through density stratifi- cation in the north. These and other conditions have created brine differentiation, mixing, and fractional

  20. POLYGENETIC TOPOGRAPHY OF THE CASCADE RANGE, WASHINGTON STATE, USA

    E-Print Network [OSTI]

    -relief topography, 2) post-Miocene surface uplift of the range superimposed on pre-existing high-relief topographyPOLYGENETIC TOPOGRAPHY OF THE CASCADE RANGE, WASHINGTON STATE, USA SARA GRAN MITCHELL Range of Washington State by analyzing the topography, geology, and exhumation patterns across the range

  1. Hydrology and Geostatistics of a Vermont, USA Kettlehole Peatland

    E-Print Network [OSTI]

    Vermont, University of

    Hydrology and Geostatistics of a Vermont, USA Kettlehole Peatland Paula J. Mousera,*, W. Cully to hydrologic changes is imperative for successful conservation and remediation efforts. We studied a 1.25-ha Vermont kettlehole bog for one year (September 2001­October 2002) to identify hydrologic controls

  2. Npad ze zabijacky zskal UK lkask patent v USA

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Nápad ze zabijacky získal UK lékaský patent v USA Compiled 24.6.2014 16:28:18 by Document Globe ® 1 Americký patent na tepelný výmník pro rovnomrné chlazení a ohívání krve pi mimotlním obhu získal tým patent funguje? U soucasných pístroj pro náhradu funkce ledvin se zamezuje srázení krve v kapilárách

  3. GREEN ENERGY AND ELECTRIC VEHICLES. BMW GROUP TECHNOLOGYOFFICE USA.

    E-Print Network [OSTI]

    California at Davis, University of

    can still guarantee where my power's coming from." "The perfect model is buy an electric car, putGREEN ENERGY AND ELECTRIC VEHICLES. BMW GROUP TECHNOLOGYOFFICE USA. LT-Z-Z, OCTOBER 2012 #12;GREEN E, LT-Z-Z,OCT 2012 Page 2 BACKGROUND. Markets for green energy and electric vehicles can accelerate

  4. University of Tennessee, USA Pacific Northwest National Laboratory,

    E-Print Network [OSTI]

    Wang, Zhong L.

    energy conversion for sustainably powering of portable electronics. Nano Lett, 2012, 12: 6339­6346 10 Zhu Georgia Institute of Technology and Emory University, USA Royal Institute of Technology, Sweden-nanowire hybrid structure for energy scavenging. Nature, 2008, 451: 809­813 4 Xu S, Qin Y, Xu C, Wei YG, Yang RS

  5. September 6th , 2008, Kimmel Center, New York, USA.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    MFCA'08 September 6th , 2008, Kimmel Center, New York, USA. http://www.inria.fr/sophia/asclepios/events/MFCA Anatomy (MFCA) workshop is to foster the interactions between the mathematical community around shapes the very successful first edition of this workshop in 2006 (see http://www.inria.fr/sophia/asclepios/events/MFCA

  6. Press release For Immediate Release Seattle, USA. June 6, 2008

    E-Print Network [OSTI]

    and the high prices for wood pellets in Europe. The rapid expansion in global trade of biomass is likelyPress release ­ For Immediate Release Seattle, USA. June 6, 2008 Global trade of woody biomass has almost doubled in five years With the increasing demand for woody biomass, global trade of particularly

  7. A General Relativistic Generalization of Bell Inequality

    E-Print Network [OSTI]

    Vladan Pankovic

    2005-06-16T23:59:59.000Z

    In this work a general relativistic generalization of Bell inequality is suggested. Namely,it is proved that practically in any general relativistic metric there is a generalization of Bell inequality.It can be satisfied within theories of local (subluminal) hidden variables, but it cannot be satisfied in the general case within standard quantum mechanical formalism or within theories of nonlocal (superluminal) hidden variables. It is shown too that within theories of nonlocal hidden variables but not in the standard quantum mechanical formalism a paradox appears in the situation when one of the correlated subsystems arrives at a Schwarzschild black hole. Namely, there is no way that black hole horizon obstructs superluminal influences between spin of the subsystem without horizon and spin of the subsystem within horizon,or simply speaking,there is none black hole horizon nor "no hair" theorem for subsystems with correlated spins. It implies that standard quantum mechanical formalism yields unique consistent and complete description of the quantum mechanical phenomenons.

  8. Particle acceleration in thick parallel shocks with high compression ratio

    E-Print Network [OSTI]

    Joni J. P. Virtanen; Rami Vainio

    2005-06-06T23:59:59.000Z

    We report studies on first-order Fermi acceleration in parallel modified shock waves with a large scattering center compression ratio expected from turbulence transmission models. Using a Monte Carlo technique we have modeled particle acceleration in shocks with a velocity ranging from nonrelativistic to ultrarelativistic and a thickness extending from nearly steplike to very wide structures exceeding the particle diffusion length by orders of magnitude. The nonrelativistic diffusion approximation is found to be surprisingly accurate in predicting the spectral index of a thick shock with large compression ratio even in the cases involving relativistic shock speeds.

  9. Compressed supersymmetry after 1 fb?¹ at the Large Hadron Collider

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    LeCompte, Thomas J.; Martin, Stephen P.

    2012-02-01T23:59:59.000Z

    We study the reach of the Large Hadron Collider with 1 fb?¹ of data at ?s=7 TeV for several classes of supersymmetric models with compressed mass spectra, using jets and missing transverse energy cuts like those employed by ATLAS for summer 2011 data. In the limit of extreme compression, the best limits come from signal regions that do not require more than 2 or 3 jets and that remove backgrounds by requiring more missing energy rather than a higher effective mass.

  10. Target Plasma Formation for Magnetic Compression/Magnetized Target Fusion

    SciTech Connect (OSTI)

    Lindemuth, I.R.; Reinovsky, R.E.; Chrien, R.E.; Christian, J.M.; Ekdahl, C.A.; Goforth, J.H.; Haight, R.C.; Idzorek, G.; King, N.S.; Kirkpatrick, R.C.; Larson, R.E.; Morgan, G.L.; Olinger, B.W.; Oona, H.; Sheehey, P.T.; Shlachter, J.S.; Smith, R.C.; Veeser, L.R.; Warthen, B.J.; Younger, S.M. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Chernyshev, V.K.; Mokhov, V.N.; Demin, A.N.; Dolin, Y.N.; Garanin, S.F.; Ivanov, V.A.; Korchagin, V.P.; Mikhailov, O.D.; Morozov, I.V.; Pak, S.V.; Pavlovskii, E.S.; Seleznev, N.Y.; Skobelev, A.N.; Volkov, G.I.; Yakubov, V.A. [All-Russian Scientific Research Institute of Experimental Physics, Arzamas-16 (Russian Federation)] [All-Russian Scientific Research Institute of Experimental Physics, Arzamas-16 (Russian Federation)

    1995-09-04T23:59:59.000Z

    Experimental observations of plasma behavior in a novel plasma formation chamber are reported. Experimental results are in reasonable agreement with two-dimensional magnetohydrodynamic computations suggesting that the plasma could subsequently be adiabatically compressed by a magnetically driven pusher to yield 1 GJ of fusion energy. An explosively driven helical flux compression generator mated with a unique closing switch/opening switch combination delivered a 2.7 MA, 347 {mu}s magnetization current and an additional 5 MA, 2.5 {mu}s electrical pulse to the chamber. A hot plasma was produced and 10{sup 13} D-T fusion reactions were observed.

  11. Tensile and compressive behavior of a swirl mat composite

    SciTech Connect (OSTI)

    Ruggles, M.B.

    1998-07-01T23:59:59.000Z

    The Durability of Lightweight Composite Structures Project was established at Oak Ridge National Laboratory (ORNL) by the US Department of Energy to provide the experimentally-based, durability-driven design guidelines necessary to assure long-term structural integrity of automotive composite components. The initial focus of the ORNL Durability Project was on one representative reference material--an isocyanurate (polyurethane) reinforced with continuous strand, swirl-mat E-glass. The present report describes tensile and compressive testing and results for the reference composite. Behavior trends and proportional limit are established for both tension and compression. Damage development due to tensile loading and strain rate effects are discussed.

  12. Benchmarking Compressed Sensing, Super-Resolution, and Filter Diagonalization

    E-Print Network [OSTI]

    Markovich, Thomas; Sanders, Jacob N; Aspuru-Guzik, Alan

    2015-01-01T23:59:59.000Z

    Signal processing techniques have been developed that use different strategies to bypass the Nyquist sampling theorem in order to recover more information than a traditional discrete Fourier transform. Here we examine three such methods: filter diagonalization, compressed sensing, and super-resolution. We apply them to a broad range of signal forms commonly found in science and engineering in order to discover when and how each method can be used most profitably. We find that filter diagonalization provides the best results for Lorentzian signals, while compressed sensing and super-resolution perform better for arbitrary signals.

  13. Compressed Air System Analysis and Retrofit for Energy Savings 

    E-Print Network [OSTI]

    Harding, C.; Nutter, D.

    2014-01-01T23:59:59.000Z

    . Therefore, high quality compressed air is a key component of that objective. The compressed air used in the manufacturing process at this facility is held to ISO (International Organization for Standardization) class 2 air quality standards.... The compressor room contained two wet storage tanks, with a total capacity of 1,800 gallons. A heated desiccant dryer with associated filters was also located in the compressor room. Dry air was sent into the plant to a 2,000 gallon dry storage tank, which...

  14. Compressive turbulent cascade and heating in the solar wind

    SciTech Connect (OSTI)

    Marino, R. [Dipartimento di Fisica, Universita della Calabria, Ponte Bucci 31C, I-87036 Rende (Italy); University of Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, 06304 Nice Cedex 4 (France); Sorriso-Valvo, L. [Liquid Crystal Laboratory, INFM/CNR, Ponte Bucci 33B, I-87036 Rende (Italy); Carbone, V. [Dipartimento di Fisica, Universita della Calabria, Ponte Bucci 31C, I-87036 Rende (Italy); Noullez, A. [University of Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, 06304 Nice Cedex 4 (France); Bruno, R. [INAF-Istituto Fisica Spazio Interplanetario, Rome (Italy)

    2010-03-25T23:59:59.000Z

    A turbulent energy cascade has been recently identified in high-latitude solar wind data samples by using a Yaglom-like relation. However, analogous scaling law, suitably modified to take into account compressible fluctuations, has been observed in a much more extended fraction of the same data set recorded by the Ulysses spacecraft. Thus, it seems that large scale density fluctuations, despite their low amplitude, play a major role in the basic scaling properties of turbulence. The compressive turbulent cascade, moreover, seems to be able to supply the energy needed to account for the local heating of the non-adiabatic solar wind.

  15. GENERAL CO-CHAIRS: F. J. Perales (Univ. Illes Balears, Spain)

    E-Print Network [OSTI]

    Illes Balears, Universitat de les

    GENERAL CO-CHAIRS: F. J. Perales (Univ. Illes Balears, Spain) B. Fisher (University of Edinburgh, UK) PROGRAM COMMITTEE: Abásolo, M. (DMI-UIB, Spain) Aloimonos, Y. (Univ. of Maryland, USA) Bagdanov, A. D. (UAB-CVC, Spain) Baldasarri, S. (Univ. Zaragoza, Spain) Bartoli A. (CNRS_LASMEA, France

  16. Asymptotic Outage Analysis of General Motion-Invariant Ad Hoc Networks

    E-Print Network [OSTI]

    Haenggi, Martin

    Asymptotic Outage Analysis of General Motion-Invariant Ad Hoc Networks Riccardo Giacomelli Dept Krishna Ganti Dept. of Electrical and Computer Eng. University of Texas at Austin Austin, TX, USA E-mail: rganti@austin.utexas.edu Martin Haenggi Dept. of Electrical Engineering University of Notre Dame Notre

  17. Bear Head LNG Corporation and Bear Head LNG (USA), LLC - FE Dkt...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Bear Head LNG Corporation and Bear Head LNG (USA), LLC - FE Dkt. No. - 15-33-LNG Bear Head LNG Corporation and Bear Head LNG (USA), LLC - FE Dkt. No. - 15-33-LNG The Office of...

  18. SEMI-ANNUAL REPORTS FOR GASFIN DEVELOPMENT USA, LLC - FE DKT...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    GASFIN DEVELOPMENT USA, LLC - FE DKT. NO. 13-06-LNG - ORDER 3253 SEMI-ANNUAL REPORTS FOR GASFIN DEVELOPMENT USA, LLC - FE DKT. NO. 13-06-LNG - ORDER 3253 April 2013 October 2013...

  19. SEMI-ANNUAL REPORTS FOR PIERIDAE ENERGY (USA), LTD - DKT. NO...

    Office of Environmental Management (EM)

    PIERIDAE ENERGY (USA), LTD - DKT. NO. 14-179-LNG - ORDER 3639 SEMI-ANNUAL REPORTS FOR PIERIDAE ENERGY (USA), LTD - DKT. NO. 14-179-LNG - ORDER 3639 No Reports Received More...

  20. Eni USA Gas Marketing LLC- FE Dkt. No.- 15-13-LNG

    Broader source: Energy.gov [DOE]

    The Office of Fossil Energy gives notice of receipt of an Application filed January 21, 2015 by Eni USA Gas Marketing LLC (ENI USA Gas Marketing), requesting blanket authorization to export...

  1. Alternative community states maintained by fire in the Klamath Mountains, USA

    E-Print Network [OSTI]

    Moritz, Max A.

    and Policy, 84 Fourth Street, Ashland, OR 97520, USA Summary 1. The earliest examples of alternative of Biology, Southern Oregon Univer- sity, Ashland, OR, USA. Journal of Ecology 2010, 98, 96­105 doi: 10

  2. U.S. Department of Energy Awards a Contract to USA Repository...

    Energy Savers [EERE]

    a Contract to USA Repository Services for Management and Operating Contractor Support for the Yucca Mountain Project U.S. Department of Energy Awards a Contract to USA Repository...

  3. Advanced Li-Ion Polymer Battery Cell Manufacturing Plant in USA...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Li-Ion Polymer Battery Cell Manufacturing Plant in USA Advanced Li-Ion Polymer Battery Cell Manufacturing Plant in USA 2012 DOE Hydrogen and Fuel Cells Program and Vehicle...

  4. Girl Scouts USA CEO visits ORNL to discuss STEM programs | ornl...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    -4165 Girl Scouts USA CEO visits ORNL to discuss STEM programs Anna Maria Chavez, middle, CEO of the Girl Scouts USA, visits the Center for Computational Sciences Jan. 30 with two...

  5. Where does all the data come from? Geoffrey Fox (Indiana University, USA), Tony Hey (Microsoft Research, USA) and Anne Trefethen

    E-Print Network [OSTI]

    Research, USA) and Anne Trefethen (Oxford University, UK) 1. Introduction The data deluge [1] is all around of the field with many petabytes of data derived from advanced instruments. The deluge and its impact focus on some examples of the scientific data deluge. We anticipate that some of the tools, techniques

  6. 374 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 55, NO. 1, JANUARY 2009 Representation and Compression of Multidimensional

    E-Print Network [OSTI]

    . Index Terms--Compression, discontinuities, metric entropy, multidimensional signals, multiscale and Compression of Multidimensional Piecewise Functions Using Surflets Venkat Chandrasekaran, Student Member, IEEE--We study the representation, approximation, and compression of functions in M dimensions that consist

  7. Maximum-Entropy Meshfree Method for Compressible and Near-Incompressible Elasticity

    SciTech Connect (OSTI)

    Ortiz, A; Puso, M A; Sukumar, N

    2009-09-04T23:59:59.000Z

    Numerical integration errors and volumetric locking in the near-incompressible limit are two outstanding issues in Galerkin-based meshfree computations. In this paper, we present a modified Gaussian integration scheme on background cells for meshfree methods that alleviates errors in numerical integration and ensures patch test satisfaction to machine precision. Secondly, a locking-free small-strain elasticity formulation for meshfree methods is proposed, which draws on developments in assumed strain methods and nodal integration techniques. In this study, maximum-entropy basis functions are used; however, the generality of our approach permits the use of any meshfree approximation. Various benchmark problems in two-dimensional compressible and near-incompressible small strain elasticity are presented to demonstrate the accuracy and optimal convergence in the energy norm of the maximum-entropy meshfree formulation.

  8. International Electric Propulsion Conference, The George Washington University, USA October 6 10, 2013

    E-Print Network [OSTI]

    Walker, Mitchell

    1 The 33rd International Electric Propulsion Conference, The George Washington University, USA Electric Propulsion Conference, The George Washington University · Washington, D.C. · USA October 6 ­ 10.t.yim@nasa.gov. #12;2 The 33rd International Electric Propulsion Conference, The George Washington University, USA

  9. The 33st International Electric Propulsion Conference, The George Washington University, USA October 6 10, 2013

    E-Print Network [OSTI]

    Walker, Mitchell

    The 33st International Electric Propulsion Conference, The George Washington University, USA, 30332, USA Abstract: Accurate measurement of ion charge flux in the plume of spacecraft electric.walker@ae.gatech.edu #12;The 33st International Electric Propulsion Conference, The George Washington University, USA

  10. Monitoring System Used to Optimize Compressed Air System Efficiency, Cut Costs

    E-Print Network [OSTI]

    Holmes, W. A.

    feeders, and major equipment and systems including compressed air. For the compressed air system, monitored data included compressor amps, electrical demand and consumption, pressure and airflow. The resulting UtiliTRACK® reports and graphs showed a...

  11. A new and efficient error resilient entropy code for image and video compression

    E-Print Network [OSTI]

    Min, Jungki

    1999-01-01T23:59:59.000Z

    Image and video compression standards such as JPEG, MPEG, H.263 are severely sensitive to errors. Among typical error propagation mechanisms in video compression schemes, loss of block synchronization causes the worst result. Even one bit error...

  12. Effects of electrode compression on the performance of a solid polymer electrolyte fuel cell

    E-Print Network [OSTI]

    Del Campo, Christopher Scott

    1997-01-01T23:59:59.000Z

    The effects of electrode compression on the performance of a polymer electrolyte fuel cell (PEFC) were investigated. Preliminary testing showed that considerable compression of the carbon cloth electrodes was provided by the PEFC structure. Further...

  13. Extension of the high load limit in the Homogeneous Charge Compression Ignition engine

    E-Print Network [OSTI]

    Scaringe, Robert J. (Robert Joseph)

    2009-01-01T23:59:59.000Z

    The Homogeneous Charge Compression Ignition (HCCI) engine offers diesel-like efficiency with very low soot and NOx emissions. In a HCCI engine, a premixed charge of air, fuel and burned gas is compressed to achieve ...

  14. Optical, electronic, and dynamical phenomena in the shock compression of condensed matter

    E-Print Network [OSTI]

    Reed, Evan J. (Evan John), 1976-

    2003-01-01T23:59:59.000Z

    Despite the study of shock wave compression of condensed matter for over 100 years, scant progress has been made in understanding the microscopic details. This thesis explores microscopic phenomena in shock compression of ...

  15. 3D microstructure modeling of compressed fiber-based Gerd Gaiselmanna,

    E-Print Network [OSTI]

    Schmidt, Volker

    consideration of compression conditions as found in fuel cells. Given the input of a 3D microstructure of some compression states, an optimal vector field is estimated by simulated annealing. The model is applied to 3D im

  16. Evaluating the Gap Between Compressive Sensing and Distributed Source Coding in WSN

    E-Print Network [OSTI]

    Rossi, Michele

    providing the best compression performance and the latter being the most energy efficient in terms of local is based on the premise that compressed data implies the transmission of smaller packets. This, in turn

  17. RATE OF STRAIN TENSOR STATISTICS IN COMPRESSIBLE HOMOGENEOUS G. Erlebacher 1 , S. Sarkar 1

    E-Print Network [OSTI]

    Erlebacher, Gordon

    RATE OF STRAIN TENSOR STATISTICS IN COMPRESSIBLE HOMOGENEOUS TURBULENCE G. Erlebacher 1 , S. Sarkar was determined in Sarkar, Erlebacher and Hus­ saini (ref. 2) to be due to enhanced compressible dis­ sipation

  18. XML Structure Compression Mark Levene and Peter Wood

    E-Print Network [OSTI]

    Levene, Mark

    (www.gzip.org/) or bzip2 (sourceware.cygnus.com/bzip2/index.html). The problems with this approach existing text compressors. Another XML compression system, XMLPPM, refines this idea further by using different text compressors with different XML components, i.e. one model for element and attribute

  19. Energy Efficient Signal Acquisition in Wireless Sensor Networks : A Compressive

    E-Print Network [OSTI]

    Cambridge, University of

    and transmission. To save the energy in WSNs and thus prolong the network lifetime, we present a novel approach1 Energy Efficient Signal Acquisition in Wireless Sensor Networks : A Compressive Sensing Framework networks (WSNs) determines the rate of its energy consumption since most of the energy is used in sampling

  20. Compressed Index for Dictionary Matching with One Error

    E-Print Network [OSTI]

    Hon, Wing-Kai; Lam, Tak-Wah; Shah, Rahul; Siu-Lung, Tam; Vitter, Jeffrey Scott

    2011-03-29T23:59:59.000Z

    . (1999), which requires O(n^{1+epsilon}) words of space and reports all occurrences in O(|T|loglog n + occ) time. Recently, there have been successes in compressing the dictionary matching index while keeping the query time optimal (Belazzougui, 2010, Hon...

  1. POSTER PRESENTATION Open Access Compressed sensing with stochastic spikes

    E-Print Network [OSTI]

    Kreiter, Andreas K.

    POSTER PRESENTATION Open Access Compressed sensing with stochastic spikes David Rotermund* , Klaus of a high dimensional state can be possible also from much lower dimensional sam- ples provided the state for non- negative activities can efficiently exploit the information contained in stochastic spike events

  2. Inexpensive delivery of compressed hydrogen with advanced vessel technology

    E-Print Network [OSTI]

    of flexible refueling (compressed/cryogenic H2/(L)H2) #12;The PVT properties of H2 drive storage and delivery) Explore station demand from 70 kg H2/day to 1000 kg H2/day · Real hydrogen thermodynamic and PVT diagram and vessel characteristics to minimize delivery cost · Hydrogen and material properties Increased

  3. DIRECT SIMULATION OF SPATIALLY EVOLVING COMPRESSIBLE TURBULENT BOUNDARY LAYERS

    E-Print Network [OSTI]

    Erlebacher, Gordon

    of the cold wall condition used in Ref. 6, and, other differences. The computational method used in this study compressible flows because of the interest in designing high speed vehicles and the associated propulsion on temperature. Under the adiabatic conditions of the experiment, the temperature increases as the wall

  4. Compression of Computer Graphics Images with Image-Based Rendering

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Compression of Computer Graphics Images with Image-Based Rendering Ilmi Yoon and Ulrich Neumann information from previously rendered images. Images predicted from prior images are combined with a residual-based rendering tech- nique provides accurate motion prediction and accelerates rendering at the same time

  5. Densities and Compressibilities of Chiral Molecules in the Liquid State

    E-Print Network [OSTI]

    Baltisberger, Jay H.

    polarized light into circularly polarized light. #12;Objective · Measure the speed of sound in Limonene 1360 15 20 25 30 35 40 45 50 55 Speed of Sound (m/s) Temperature ( °C) Speed of Sound in LimoneneDensities and Compressibilities of Chiral Molecules in the Liquid State Imelda Hot and Dr. Amer S

  6. Pulse compression in plasma: generation of femtosecond pulses without CPA

    E-Print Network [OSTI]

    ­frequency laser beam into the energy of a short lower­frequency laser pulse. The standard approach to generating high­intensity ultra­short laser pulses is Chirped Pulse Amplification [1] (CPA), in which a laser Garching, Germany Abstract: Laser pulses can be e#ciently compressed to femto­ second duration when

  7. Pellet Production Wood Pellets are made by compressing

    E-Print Network [OSTI]

    Pellet Production Wood Pellets are made by compressing clean dry sawdust, under very high pressure into a pellet as it cools. The material used for producing pellets usually comes from industries who are already pellets reduces the volume of material they have to treat as waste, reducing landfill. Pellets have

  8. Dynamic control of a homogeneous charge compression ignition engine

    DOE Patents [OSTI]

    Duffy, Kevin P. (Metamora, IL); Mehresh, Parag (Peoria, IL); Schuh, David (Peoria, IL); Kieser, Andrew J. (Morton, IL); Hergart, Carl-Anders (Peoria, IL); Hardy, William L. (Peoria, IL); Rodman, Anthony (Chillicothe, IL); Liechty, Michael P. (Chillicothe, IL)

    2008-06-03T23:59:59.000Z

    A homogenous charge compression ignition engine is operated by compressing a charge mixture of air, exhaust and fuel in a combustion chamber to an autoignition condition of the fuel. The engine may facilitate a transition from a first combination of speed and load to a second combination of speed and load by changing the charge mixture and compression ratio. This may be accomplished in a consecutive engine cycle by adjusting both a fuel injector control signal and a variable valve control signal away from a nominal variable valve control signal. Thereafter in one or more subsequent engine cycles, more sluggish adjustments are made to at least one of a geometric compression ratio control signal and an exhaust gas recirculation control signal to allow the variable valve control signal to be readjusted back toward its nominal variable valve control signal setting. By readjusting the variable valve control signal back toward its nominal setting, the engine will be ready for another transition to a new combination of engine speed and load.

  9. ESTIMATING ENERGY SAVINGS IN COMPRESSED AIR SYSTEMS Chris Schmidt

    E-Print Network [OSTI]

    Kissock, Kelly

    ESTIMATING ENERGY SAVINGS IN COMPRESSED AIR SYSTEMS Chris Schmidt Project Engineer Energy Industrial Assessment Center Department of Mechanical Engineering University of Dayton Dayton, Ohio ABSTRACT energy savings must be calculated in order to justify the cost of implementing the savings opportunity

  10. Improvements to the Block Sorting Text Compression Algorithm

    E-Print Network [OSTI]

    Fenwick, Peter

    that it is a context­based compressor of unbounded order, but those contexts are completely restructured by the sort that the requirements on the final compression stage are quite different from those in compressors of more conventional, eventually yielding a compressor which is among the best so far presented and is actually based

  11. Experiments with a Block Sorting Text Compression Algorithm

    E-Print Network [OSTI]

    Fenwick, Peter

    compressors. The original paper did little more than present the algorithm, with strong advice for efficient on aspects of its operation. Consideration of the possible efficiency of text compression leads to the revival of ideas by Shannon as the basis of a text compressor and then to the classification of the Block

  12. Compressive Strength of Gamma-Irradiated Polymer Concrete

    E-Print Network [OSTI]

    North Texas, University of

    Compressive Strength of Gamma-Irradiated Polymer Concrete Gonzalo Marti´nez-Barrera,1,2 Uriel concrete (PC) was developed by using differ- ent concentrations of silica sand as aggregate of Plastics Engineers INTRODUCTION Polymer concrete (PC) is a particulate composite where thermoset resins

  13. POLARIZATION AND COMPRESSIBILITY OF OBLIQUE KINETIC ALFVEN WAVES

    SciTech Connect (OSTI)

    Hunana, P.; Goldstein, M. L. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)] [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Passot, T.; Sulem, P. L.; Laveder, D. [Laboratoire J. L. Lagrange, Universite de Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, BP 4229, F-06304 Nice Cedex 4 (France)] [Laboratoire J. L. Lagrange, Universite de Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, BP 4229, F-06304 Nice Cedex 4 (France); Zank, G. P. [Center for Space Plasma and Aeronomic Research (CSPAR), University of Alabama in Huntsville, Huntsville, AL 35805 (United States)] [Center for Space Plasma and Aeronomic Research (CSPAR), University of Alabama in Huntsville, Huntsville, AL 35805 (United States)

    2013-04-01T23:59:59.000Z

    It is well known that a complete description of the solar wind requires a kinetic description and that, particularly at sub-proton scales, kinetic effects cannot be ignored. It is nevertheless usually assumed that at scales significantly larger than the proton gyroscale r{sub L} , magnetohydrodynamics or its extensions, such as Hall-MHD and two-fluid models with isotropic pressures, provide a satisfactory description of the solar wind. Here we calculate the polarization and magnetic compressibility of oblique kinetic Alfven waves and show that, compared with linear kinetic theory, the isotropic two-fluid description is very compressible, with the largest discrepancy occurring at scales larger than the proton gyroscale. In contrast, introducing anisotropic pressure fluctuations with the usual double-adiabatic (or CGL) equations of state yields compressibility values which are unrealistically low. We also show that both of these classes of fluid models incorrectly describe the electric field polarization. To incorporate linear kinetic effects, we use two versions of the Landau fluid model that include linear Landau damping and finite Larmor radius (FLR) corrections. We show that Landau damping is crucial for correct modeling of magnetic compressibility, and that the anisotropy of pressure fluctuations should not be introduced without taking into account the Landau damping through appropriate heat flux equations. We also show that FLR corrections to all the retained fluid moments appear to be necessary to yield the correct polarization. We conclude that kinetic effects cannot be ignored even for kr{sub L} << 1.

  14. On optimally partitioning a text to improve its compression

    E-Print Network [OSTI]

    Ferragina, Paolo; Venturini, Rossano

    2009-01-01T23:59:59.000Z

    In this paper we investigate the problem of partitioning an input string T in such a way that compressing individually its parts via a base-compressor C gets a compressed output that is shorter than applying C over the entire T at once. This problem was introduced in the context of table compression, and then further elaborated and extended to strings and trees. Unfortunately, the literature offers poor solutions: namely, we know either a cubic-time algorithm for computing the optimal partition based on dynamic programming, or few heuristics that do not guarantee any bounds on the efficacy of their computed partition, or algorithms that are efficient but work in some specific scenarios (such as the Burrows-Wheeler Transform) and achieve compression performance that might be worse than the optimal-partitioning by a $\\Omega(\\sqrt{\\log n})$ factor. Therefore, computing efficiently the optimal solution is still open. In this paper we provide the first algorithm which is guaranteed to compute in $O(n \\log_{1+\\eps}...

  15. Ris-R-1393(EN) Compression Strength of a Fibre

    E-Print Network [OSTI]

    Risø-R-1393(EN) Compression Strength of a Fibre Composite Main Spar in a Wind Turbine Blade Find out in the project "Fun- damentals for improved design of large wind turbine blade of fibre composites of a wind turbine blade is found and compared with a full-scale test, made in the same project. Especially

  16. Digitally-Assisted Mixed-Signal Wideband Compressive Sensing

    E-Print Network [OSTI]

    Yu, Zhuizhuan

    2012-07-16T23:59:59.000Z

    knowledge, this prototype is the first reported integrated chip for wideband mixed-signal compressive sensing. The proposed prototype achieves 7 bits ENOB and 3 GS/s equivalent sampling rate in simulation assuming a 0.5 ps state-of-art jitter variance, whose...

  17. Dynamic Phase Boundaries for Compressible Fluids , Z. L. Xu

    E-Print Network [OSTI]

    New York at Stoney Brook, State University of

    discontinuity. The emphasis here is on the coupling of the phase transition process to acoustic waves, whichDynamic Phase Boundaries for Compressible Fluids T. Lu § , Z. L. Xu § , R. Samulyak§ , J. Glimm algorithm is verified by application to various physical regimes. 1 Introduction The coupling

  18. Random Access Compressed Sensing over Fading and Noisy Communication Channels

    E-Print Network [OSTI]

    Stojanovic, Milica

    of the climate change. Such applications require the least control and intervention as well as minimum energy1 Random Access Compressed Sensing over Fading and Noisy Communication Channels Fatemeh Fazel on integrating random sensing with the communication architecture, and achieves overall efficiency in terms

  19. STATUS OF THE NEUTRALIZED DRIFT COMPRESSION EXPERIMENT (NDCX-II)

    SciTech Connect (OSTI)

    Waldron, W.L.; Kwan, J.W.

    2011-04-21T23:59:59.000Z

    The Neutralized Drift Compression Experiment (NDCX-II) is an 11 M$ induction accelerator project currently in construction at Lawrence Berkeley National Laboratory for warm dense matter (WDM) experiments investigating the interaction of ion beams with matter at elevated temperature and pressure. The machine consists of a lithium injector, induction accelerator cells, diagnostic cells, a neutralized drift compression line, a final focus solenoid, and a target chamber. The induction cells and some of the pulsed power systems have been reused from the decommissioned Advanced Test Accelerator at Lawrence Livermore National Laboratory after refurbishment and modification. The machine relies on a sequence of acceleration waveforms to longitudinally compress the initial ion pulse from 600 ns to less than 1 ns in {approx} 12 m. Radial confinement of the beam is achieved with 2.5 T pulsed solenoids. In the initial hardware configuration, 50 nC of Li{sup +} will be accelerated to 1.25 MeV and allowed to drift-compress to a peak current of {approx}40 A. The project started in the summer of 2009. Construction of the accelerator will be completed in the fall of 2011 and will provide a worldwide unique opportunity for ion-driven warm dense matter experiments as well as research related to novel beam manipulations for heavy ion fusion drivers.

  20. ARBITRARY LAGRANGIAN-EULERIAN (ALE) METHODS IN COMPRESSIBLE FLUID DYNAMICS

    E-Print Network [OSTI]

    Kurien, Susan

    · . Scalar quantities (density , pressure p, specific internal energy and temperature T) are approximated Lagrangian system is numerically treated by compatible method [8, 9] conserving total energy. Several types Lagrangian-Eulerian (ALE [1]) code for simulation of problems in compressible fluid dynamics and plasma

  1. Compression of redundancy free trellis stages in Turbo-Decoder

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Compression of redundancy free trellis stages in Turbo-Decoder E. Boutillon, J. Sánchez-Rojas and C. Marchand For turbo code with coding rate close to one, the high puncturing rate induces long sequences. The computation is reduced accordingly. Introduction: Turbo codes with coding rate close to one are specified

  2. Vortex stabilized electron beam compressed fusion grade plasma

    SciTech Connect (OSTI)

    Hershcovitch, Ady [Brookhaven National Lab. (BNL), Upton, NY (United States). Collider-Accelerator Dept.

    2014-03-19T23:59:59.000Z

    Most inertial confinement fusion schemes are comprised of highly compressed dense plasmas. Those schemes involve short, extremely high power, short pulses of beams (lasers, particles) applied to lower density plasmas or solid pellets. An alternative approach could be to shoot an intense electron beam through very dense, atmospheric pressure, vortex stabilized plasma.

  3. NUMERICAL INVESTIGATION OF CAVITATION IN MULTI-DIMENSIONAL COMPRESSIBLE FLOWS

    E-Print Network [OSTI]

    NUMERICAL INVESTIGATION OF CAVITATION IN MULTI-DIMENSIONAL COMPRESSIBLE FLOWS KRISTEN J. DEVAULT, cavitation, pseudospectral AMS subject classifications. 35Q30, 65M70, 76N99 1. Introduction. A long to first make a careful numerical study of the simplest possible scenario where one could expect cavitation

  4. Ch. 15 Wavelet-Based Compression The Wavelet Transform

    E-Print Network [OSTI]

    Fowler, Mark

    sent to describe allocations WT-BASED COMPRESSION EXAMPLE Time Frequency #12;42 From http://www.amara.com/IEEEwave/IW_fbi.html See also http://www.c3.lanl.gov/~brislawn/FBI/FBI.html Original Fingerprint Image Decoded Fingerprint

  5. COMPRESSIVE DEFORMATION AND YIELDING MECHANISMS IN CELLULAR Al ALLOYS DETERMINED

    E-Print Network [OSTI]

    Wadley, Haydn

    compressive stress/strain characteristics that enhance the thermomechanical performance of buckling or bending is used as an interior for a double-walled tube, its ability to suppress local buckling leads to slightly enhanced structural eciency [Fig. 1(a)] [1]. Moreover, and more importantly, by suppressing lateral defor

  6. Beyond Leaks: Demand-side Strategies for Improving Compressed Air Efficiency

    E-Print Network [OSTI]

    Howe, B.; Scales, B.

    Beyond Leaks: Demand-side Strategies for Bill Howe, PE Director, Corporate Energy Services E Source, Inc. Boulder, Colorado SUMMARY Staggering amounts of compressed air are wasted or misapplied in otherwise well run manufacturing...-maintained plants lose about 10 percent of compressed air to leaks, while many more lose over 50 percent. In addition to leaks, wasteful application of compressed air can eat up another 5 to 40 percent of compressed air volume-even in otherwise well...

  7. The lifetime of shape oscillations of a bubble in an unbounded, inviscid and compressible fluid with surface tension

    E-Print Network [OSTI]

    Ovidiu Costin; Saleh Tanveer; Michael I. Weinstein

    2012-10-01T23:59:59.000Z

    General perturbations of a spherical gas bubble in a compressible and inviscid fluid with surface tension were proved in Shapiro and Weinstein (2011), in the linearized approximation, to decay exponentially, $\\sim e^{-\\Gamma t}, \\Gamma>0$, as time advances. Formal asymptotic and numerical evidence led to the conjecture that $\\Gamma \\approx \\frac{A}{\\epsilon} \\frac{We}{\\epsilon^{2}} \\exp(-B \\frac{We}{\\epsilon^2})$, where $0<\\epsilon\\ll1$ is the Mach number, We is the Weber number, and $A$ and $B$ are positive constants. In this paper, we prove this conjecture and calculate $A$ and $B$ to leading order in $\\epsilon$.

  8. Generalizations of quantum statistics

    E-Print Network [OSTI]

    O. W. Greenberg

    2008-05-02T23:59:59.000Z

    We review generalizations of quantum statistics, including parabose, parafermi, and quon statistics, but not including anyon statistics, which is special to two dimensions.

  9. Generalized discoid lupus erythematosus

    E-Print Network [OSTI]

    2009-01-01T23:59:59.000Z

    was diagnostic of discoid lupus erythematosus (DLE).A minority of patients with DLE progress to develop systemicalthough generalized DLE is more frequently associated with

  10. Fractal Volume Compression Wayne O. Cochran John C. Hart Patrick J. Flynn

    E-Print Network [OSTI]

    Fractal Volume Compression Wayne O. Cochran John C. Hart Patrick J. Flynn School of Electrical@eecs.wsu.edu October 18, 1995 Abstract This research is the rst application of fractal compression to volumetric data. The various components of the fractal image compression method extend simply and di- rectly to the volumetric

  11. Performance of Multi-Level and Multi-Component Compressed Bitmap Indexes

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    LBNL-60891 Performance of Multi-Level and Multi-Component Compressed Bitmap Indexes Kesheng Wu cardinality attributes when certain compression methods are applied. There are many different bitmap indexes subsets of compressed bitmap indexes that use multi-component and multi-level encodings. We combine

  12. DIRECT NUMERICAL SIMULATION OF COMPRESSIBLE TRANSITION: AN OVERVIEW M.Y. Hussaini and G. Erlebacher

    E-Print Network [OSTI]

    Erlebacher, Gordon

    DIRECT NUMERICAL SIMULATION OF COMPRESSIBLE TRANSITION: AN OVERVIEW M.Y. Hussaini and G. Erlebacher in the field of compressible transition. As a result, new computational tools have made their appearance. Recently however, research at Langley has begun to focus on the simulation of compressible transition

  13. MULTISCALE RANDOM PROJECTIONS FOR COMPRESSIVE CLASSIFICATION Marco F. Duarte,r

    E-Print Network [OSTI]

    of sam- pling and compression [1, 2]. CS enables the design of new kinds of compressive imaging systems ratio test; in the case of image classification, it exploits the fact that a set of images of a fixed- quires compressive image projections, we achieve high clas- sification rates using many fewer

  14. Planning and Installation Guide: North Carolina Compressed Natural Gas Fueling Stations

    E-Print Network [OSTI]

    1 Planning and Installation Guide: North Carolina Compressed Natural Gas Fueling Stations Introduction Are you considering installing a compressed natural gas (CNG) fueling station for your fleet to provide your fleet with fuel. One resource for locating and identifying public compressed natural gas

  15. CALIBRATING MS-SSIM FOR COMPRESSION DISTORTIONS USING MLDS C. Charrier1

    E-Print Network [OSTI]

    Maloney, Laurence T.

    its performance. Index Terms-- Difference scaling, Genetic algorithm, MS-SSIM. 1. INTRODUCTION Lossy image compression techniques such as JPEG2000 al- low high compression rates, but only at the cost as the compression rate is increased to optimize the construction of psychovisual scale. Such a scale will serve

  16. A Low-power, Low-memory System for Wavelet-based Image Compression

    E-Print Network [OSTI]

    Walker, James S.

    of the components of our particular method of wavelet transform based image compression. 2 Wavelet transformsA Low-power, Low-memory System for Wavelet-based Image Compression James S. Walker Department the following advan- tages: low-power utilization, low RAM requirements, embedded bit-plane compression, scal

  17. BAP Sparsing: A Novel Approach to MPEG-4 Body Animation Parameter Compression

    E-Print Network [OSTI]

    Bhandarkar, Suchendra "Suchi" M.

    , such as virtual humans [1] [2]. A virtual human body model is animated using a stream of body animation parameters virtual bodies and their animation to be compressed using a standard compression pipeline comprisingBAP Sparsing: A Novel Approach to MPEG-4 Body Animation Parameter Compression Siddhartha

  18. COMPRESSIVE SAMPLING FOR NON-INTRUSIVE APPLIANCE LOAD MONITORING (NALM) USING CURRENT WAVEFORMS

    E-Print Network [OSTI]

    Leus, Geert

    COMPRESSIVE SAMPLING FOR NON-INTRUSIVE APPLIANCE LOAD MONITORING (NALM) USING CURRENT WAVEFORMS advanced services like dynamic electricity pricing. The non-intrusive appliance load monitoring (NALM) [1/off status of each appliance from the compressed measurement as if the original non-compressed measurement

  19. Partial Encryption of Compressed Images and Videos \\Lambda Howard Cheng y and Xiaobo Li z

    E-Print Network [OSTI]

    Cheng, Howard

    Partial Encryption of Compressed Images and Videos \\Lambda Howard Cheng y and Xiaobo Li z, if not impossible, to carry out real­time secure image and video communication and processing. Methods have been of the compressed data. Partial encryption is applied to several image and video compression algorithms

  20. Hydrocarbon Seeps of the Mesozoic Great Valley Group Forearc Strata and Franciscan Complex, Northern and Central California, U.S.A.

    E-Print Network [OSTI]

    Keenan, Kristin Euphrat

    2010-01-01T23:59:59.000Z

    Washington State, USA. Sedimentology Peckmann, J. , C. T. S.Washington State, USA. Sedimentology Peckmann, J. , J. L.

  1. Generalized Galilean Genesis

    E-Print Network [OSTI]

    Nishi, Sakine

    2015-01-01T23:59:59.000Z

    The galilean genesis scenario is an alternative to inflation in which the universe starts expanding from Minkowski in the asymptotic past by violating the null energy condition stably. Several concrete models of galilean genesis have been constructed so far within the context of galileon-type scalar-field theories. We give a generic, unified description of the galilean genesis scenario in terms of the Horndeski theory, i.e., the most general scalar-tensor theory with second-order field equations. In doing so we generalize the previous models to have a new parameter (denoted by {\\alpha}) which results in controlling the evolution of the Hubble rate. The background dynamics is investigated to show that the generalized galilean genesis solution is an attractor, similarly to the original model. We also study the nature of primordial perturbations in the generalized galilean genesis scenario. In all the models described by our generalized genesis Lagrangian, amplification of tensor perturbations does not occur as ...

  2. CEMENT and CONCRETE RESEARCH. Vol. 21, pp. 147-157, 1991. Printed in the USA. 0008-8846/91. $3.00+00. Copyright (e) 1991 PergamonPress pie.

    E-Print Network [OSTI]

    Mobasher, Barzin

    CEMENT and CONCRETE RESEARCH. Vol. 21, pp. 147-157, 1991. Printed in the USA. 0008-8846/91. $3 OF EXPANSIVE-CEMENT PASTE Menashi D. Cohen and Barzin Mobasher* School of Civil Engineering Purdue University and between expansive-clinker content and expansion time in expansive-cement pastes. Generally, as the amount

  3. Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening

    DOE Patents [OSTI]

    Fu, C.Y.; Petrich, L.I.

    1997-12-30T23:59:59.000Z

    An image represented in a first image array of pixels is first decimated in two dimensions before being compressed by a predefined compression algorithm such as JPEG. Another possible predefined compression algorithm can involve a wavelet technique. The compressed, reduced image is then transmitted over the limited bandwidth transmission medium, and the transmitted image is decompressed using an algorithm which is an inverse of the predefined compression algorithm (such as reverse JPEG). The decompressed, reduced image is then interpolated back to its original array size. Edges (contours) in the image are then sharpened to enhance the perceptual quality of the reconstructed image. Specific sharpening techniques are described. 22 figs.

  4. Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening

    DOE Patents [OSTI]

    Fu, Chi-Yung (San Francisco, CA); Petrich, Loren I. (Livermore, CA)

    1997-01-01T23:59:59.000Z

    An image represented in a first image array of pixels is first decimated in two dimensions before being compressed by a predefined compression algorithm such as JPEG. Another possible predefined compression algorithm can involve a wavelet technique. The compressed, reduced image is then transmitted over the limited bandwidth transmission medium, and the transmitted image is decompressed using an algorithm which is an inverse of the predefined compression algorithm (such as reverse JPEG). The decompressed, reduced image is then interpolated back to its original array size. Edges (contours) in the image are then sharpened to enhance the perceptual quality of the reconstructed image. Specific sharpening techniques are described.

  5. Report on inspection of concerns regarding DOE`s evaluation of Chevron USA`s unsolicited proposal for the Elk Hills Naval Petroleum Reserve

    SciTech Connect (OSTI)

    NONE

    1997-11-17T23:59:59.000Z

    An allegation was made to the Office of Inspector General (OIG) that the integrity of the Department of Energy`s (DOE) unsolicited proposal review process may have been compromised by the actions of a former Deputy Secretary of Energy and his Executive Assistant during the review of an unsolicited proposal received from Chevron U.S.A. Production Company (Chevron) in may 1993. The Chevron unsolicited proposal was for the management and operation of DOE`s Elk Hills Naval Petroleum Reserve (Elk Hills), located near Bakersfield, California. Chevron submitted the unsolicited proposal on May 19, 1993. DOE formally rejected Chevron`s unsolicited proposal in May 1995. Although Chevron`s unsolicited proposal was eventually rejected by DOE, the complainant specifically alleged that the {open_quotes}sanctity, integrity, and sensitivity{close_quotes} of the unsolicited proposal review process had been breached in meetings during the Fall of 1993 between Chevron officials, the Deputy Secretary of Energy (Deputy Secretary), and his Executive Assistant. Based on our review of the allegation, we identified the following issue as the focus of our inspection.

  6. Generalized interaction in multigravity

    E-Print Network [OSTI]

    Duplij, Steven

    2013-01-01T23:59:59.000Z

    A general approach to description of multigravity models in D-dimensional space-time is presented. Different possibilities of generalization of the invariant volume are given. Then a most general form of the interaction potential is constructed, which for bigravity coincides with the Pauli-Fierz model. A thorough analysis of the model along the 3+1 expansion formalism is done. It is shown that the absence of ghosts the considered bigravity model is equivalent in the weak field limit to the massive gravity (the Pauli-Fierz model). Thus, on the concrete example it is shown, that the interaction between metrics leads to nonvanishing mass of graviton.

  7. Compression of laser radiation in plasmas via electromagnetic cascading

    SciTech Connect (OSTI)

    Kalmykov, Serguei; Shvets, Gennady [Department of Physics and Institute for Fusion Studies, University of Texas at Austin, One University Station C1500, Austin, Texas 78712 (United States)

    2006-05-15T23:59:59.000Z

    A train of few-laser-cycle relativistically intense radiation spikes with a terahertz repetition rate can be organized self-consistently in plasma from two frequency detuned co-propagating laser beams of low intensity. Large frequency bandwidth for the compression of spikes is produced via laser-induced periodic modulation of the plasma refractive index. The beat-wave-driven electron plasma wave downshifted from the plasma frequency creates a moving index grating thus inducing a periodic phase modulation of the driving laser (in spectral terms, electromagnetic cascading). The group velocity dispersion compresses the chirped laser beat notes to a few-cycle duration and relativistic intensity either concurrently in the same, or sequentially in different plasmas. Particle-in-cell simulations indicate that the effect persists in a realistic three-dimensional axisymmetric geometry.

  8. Ultrafast electron diffraction with radio-frequency compressed electron pulses

    SciTech Connect (OSTI)

    Chatelain, Robert P.; Morrison, Vance R.; Godbout, Chris; Siwick, Bradley J. [Departments of Physics and Chemistry, Center for the Physics of Materials, McGill University, Montreal (Canada)

    2012-08-20T23:59:59.000Z

    We report on the complete characterization of time resolution in an ultrafast electron diffraction (UED) instrument based on radio-frequency electron pulse compression. The temporal impulse response function of the instrument was determined directly in pump-probe geometry by performing electron-laser pulse cross-correlation measurements using the ponderomotive interaction. With optimal settings, a stable impulse response of 334{+-}10 fs was measured at a bunch charge of 0.1 pC (6.24 Multiplication-Sign 10{sup 5} electrons/pulse); a dramatic improvement compared to performance without pulse compression. Phase stability currently limits the impulse response of the UED diffractometer to the range of 334-500 fs, for bunch charges ranging between 0.1 and 0.6 pC.

  9. Shock compression experiments on Lithium Deuteride single crystals.

    SciTech Connect (OSTI)

    Knudson, Marcus D.; Desjarlais, Michael P.; Lemke, Raymond W.

    2014-10-01T23:59:59.000Z

    S hock compression exper iments in the few hundred GPa (multi - Mabr) regime were performed on Lithium Deuteride (LiD) single crystals . This study utilized the high velocity flyer plate capability of the Sandia Z Machine to perform impact experiments at flyer plate velocities in the range of 17 - 32 km/s. Measurements included pressure, density, and temperature between ~200 - 600 GPa along the Principal Hugoniot - the locus of end states achievable through compression by large amplitude shock waves - as well as pressure and density of re - shock states up to ~900 GPa . The experimental measurements are compared with recent density functional theory calculations as well as a new tabular equation of state developed at Los Alamos National Labs.

  10. Explosive flux compression generators for rail gun power sources

    SciTech Connect (OSTI)

    Fowler, C.M.; Peterson, D.R.; Caird, R.S.; Erickson, D.J.; Freeman, B.L.; King, J.C.

    1980-01-01T23:59:59.000Z

    A class of explosive magnetic flux compression generators is described that has been used successfully to power rail guns. A program to increase current magnitudes and pulse lengths is outlined. Various generator loss terms are defined and plans to overcome some of them are discussed. Included are various modifications of the conventional strip generators that are more resistant to undesirable expansion of generator components from magnetic forces. Finally, an integral rail gun is discussed that has coaxial geometry. Integral rail guns utilize the rails themselves as flux compression generator elements and, under ideal conditions, are theoretically capable of driving projectiles to arbitrarily high velocities. Integral coaxial rail guns should be superior in some regards to their square bore counterparts.

  11. Proton radiography of a shock-compressed target

    SciTech Connect (OSTI)

    Ravasio, A.; Benuzzi-Mounaix, A.; Loupias, B.; Ozaki, N.; Vinci, T.; Koenig, M. [Laboratoire pour l'Utilisation des Lasers Intenses, UMR 7605, CNRS-CEA-Universite Paris VI-Ecole Polytechnique, 91128 Palaiseau Cedex (France); Romagnani, L.; Cecchetti, C.; Borghesi, M. [School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 INN (United Kingdom); Le Pape, S.; Hicks, D.; MacKinnon, A.; Park, H. S.; Patel, P. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Batani, D.; Dezulian, R. [Dipartimento di Fisica G. Occhialini, Universita di Milano-Bicocca, Piazza Della Scienze 3, 20126 Milano (Italy); Boehly, T. [Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States); Gremillet, L.; Henry, E. [CEA, DAM, DIF, F-91297 Arpajon Cedex (France); Schiavi, A. [Department of Energetics, University of Rome 'La Sapienza' Rome (Italy)

    2010-07-15T23:59:59.000Z

    In this paper we report on the radiography of a shock-compressed target using laser produced proton beams. A low-density carbon foam target was shock compressed by long pulse high-energy laser beams. The shock front was transversally probed with a proton beam produced in the interaction of a high intensity laser beam with a gold foil. We show that from radiography data, the density profile in the shocked target can be deduced using Monte Carlo simulations. By changing the delay between long and short pulse beams, we could probe different plasma conditions and structures, demonstrating that the details of the steep density gradient can be resolved. This technique is validated as a diagnostic for the investigation of warm dense plasmas, allowing an in situ characterization of high-density contrasted plasmas.

  12. Isentropic compression studies using the NHMFL single turn

    SciTech Connect (OSTI)

    Tasker, Douglas G [Los Alamos National Laboratory; Mielke, Charles [Los Alamos National Laboratory; Rodriguez, George [Los Alamos National Laboratory; Rickel, Dwight [Los Alamos National Laboratory

    2010-10-19T23:59:59.000Z

    Magnetic isentropic compression experiments (ICE) provide the most accurate shock free compression data for materials at megabar stresses. Recent ICE experiments performed on the Sandia Z-machine (Asay, 1999) and at the Los Alamos High Explosive Pulsed Power facility (Tasker, 2006) are providing our nation with data on material properties in extreme dynamic high stress environments. The LANL National High Magnetic Field Laboratory (NHMFL) can offer a less complex ICE experiment at high stresses (up to {approx}1Mbar) with a high sample throughput and relatively low cost. This is not to say that the NHMFL technique will replace the other methods but rather complement them. For example, NHMFL-ICE is ideal for the development of advanced diagnostics, e.g., to detect phase changes. We will discuss the physics of the NHMFL-ICE experiments and present data from the first proof-of-principle experiments that were performed in September 2010.

  13. Evaluation of compression members with non-ideal end conditions

    E-Print Network [OSTI]

    Marek, David Leslie

    1993-01-01T23:59:59.000Z

    f/ cr effective connection restraint (k-in/rad), modulus of elasticity (ksi), yield stress of steel (ksi), ratio of stiffness (non-dimensional), moment of inertia about axis of buckling (in4), effective length factor (non-dimensional), length... of compression member (in), plastic moment capacity of the column (k-in), critical buckling load (kips) rotational stiffness of connection (k-in/rad), end restraint parameter (non-dimensional), buckling load parameter (non-dimensional), approximate function...

  14. Costs Associated With Compressed Natural Gas Vehicle Fueling Infrastructure

    SciTech Connect (OSTI)

    Smith, M.; Gonzales, J.

    2014-09-01T23:59:59.000Z

    This document is designed to help fleets understand the cost factors associated with fueling infrastructure for compressed natural gas (CNG) vehicles. It provides estimated cost ranges for various sizes and types of CNG fueling stations and an overview of factors that contribute to the total cost of an installed station. The information presented is based on input from professionals in the natural gas industry who design, sell equipment for, and/or own and operate CNG stations.

  15. Shock compression of liquid helium to 56 GPa (560 kbar)

    SciTech Connect (OSTI)

    Nellis, W.J.; Holmes, N.C.; Mitchell, A.C.; Trainor, R.J.; Governo, G.K.; Ross, M.; Young, D.A.

    1984-09-24T23:59:59.000Z

    The first shock-compression experiments on liquid helium are reported. With a two-stage light-gas gun, liquid He at 4.3 K and 1 atm was shocked to 16 GPa and 12 000 K and double shocked to 56 GPa and 21 000 K. Liquid perturbation theory has been used to determine an effective interatomic potential from which the equation of state of He can be obtained over a wide range of densities and temperatures.

  16. Proceedings of the ASME 2009 International Mechanical Engineering Congress & Exposition November 13-19, Lake Buena Vista, Florida, USA

    E-Print Network [OSTI]

    Attinger, Daniel

    University Department of Mechanical Engineering New York, NY, USA Lubomir Smilenov Columbia University Center

  17. Compression of Laser Radiation in Plasmas Using Electromagnetic Cascading

    SciTech Connect (OSTI)

    Kalmykov, Serguei; Shvets, Gennady [Department of Physics and Institute for Fusion Studies, University of Texas at Austin, One University Station C1500, Austin, Texas 78712 (United States)

    2005-06-17T23:59:59.000Z

    Compressing high-power laser beams in plasmas via generation of a coherent cascade of electromagnetic sidebands is described. The technique requires two copropagating beams detuned by a near-resonant frequency {omega} < or approx. {omega}{sub p}. The ponderomotive force of the laser beat wave drives an electron plasma wave which modifies the refractive index of plasma so as to produce a periodic phase modulation of the laser field with the beat period {tau}{sub b}=2{pi}/{omega}. A train of chirped laser beat notes (each of duration {tau}{sub b}) is thus created. The group velocity dispersion of radiation in plasma can then compress each beat note to a few-laser-cycle duration. As a result, a train of sharp electromagnetic spikes separated in time by {tau}{sub b} is formed. Depending on the plasma and laser parameters, chirping and compression can be implemented either concurrently in the same plasma or sequentially in different plasmas.

  18. Shockless compression and release behavior of beryllium to 110?GPa

    SciTech Connect (OSTI)

    Brown, J. L.; Knudson, M. D.; Alexander, C. S.; Asay, J. R. [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

    2014-07-21T23:59:59.000Z

    A magnetohydrodynamic loading technique was used to shocklessly compress beryllium to peak longitudinal stresses of 19–110?GPa and, subsequently, unload in order to determine both the compressive response and also the shear stress supported upon release. Loading strain rates were on the order of 10{sup 6?}s{sup ?1}, while the unloading rates were nearly constant at 3?×?10{sup 5?}s{sup ?1}. Velocimetry was used to monitor the ramp and release behavior of a beryllium/lithium fluoride window interface. After applying window corrections to infer in situ beryllium velocities, a Lagrangian analysis was employed to determine the material response. The Lagrangian wavespeed-particle velocity response is integrated to generate the stress-strain path, average change in shear stress over the elastic unloading, and estimates of the shear modulus at peak compression. These data are used to infer the pressure dependence of the flow strength at the unloading rate. Comparisons to several strength models reveal good agreement to 45?GPa, but the data indicate 20%–30% higher strength near 100?GPa.

  19. Centrifugal compression of soft particle packings - theory and experiment

    E-Print Network [OSTI]

    K. N. Nordstrom; E. Verneuil; W. G. Ellenbroek; T. C. Lubensky; J. P. Gollub; D. J. Durian

    2010-09-15T23:59:59.000Z

    An exact method is developed for computing the height of an elastic medium subjected to centrifugal compression, for arbitrary constitutive relation between stress and strain. Example solutions are obtained for power-law media and for cases where the stress diverges at a critical strain -- for example as required by packings composed of deformable but incompressible particles. Experimental data are presented for the centrifugal compression of thermo-responsive N-isopropylacrylamide (NIPA) microgel beads in water. For small radial acceleration, the results are consistent with Hertzian elasticity, and are analyzed in terms of the Young elastic modulus of the bead material. For large radial acceleration, the sample compression asymptotes to a value corresponding to a space-filling particle volume fraction of unity. Therefore we conclude that the gel beads are incompressible, and deform without deswelling. In addition, we find that the Young elastic modulus of the particulate gel material scales with cross-link density raised to the power 3.3+-0.8, somewhat larger than the Flory expectation.

  20. Active high-power RF switch and pulse compression system

    DOE Patents [OSTI]

    Tantawi, Sami G. (San Mateo, CA); Ruth, Ronald D. (Woodside, CA); Zolotorev, Max (Mountain View, CA)

    1998-01-01T23:59:59.000Z

    A high-power RF switching device employs a semiconductor wafer positioned in the third port of a three-port RF device. A controllable source of directed energy, such as a suitable laser or electron beam, is aimed at the semiconductor material. When the source is turned on, the energy incident on the wafer induces an electron-hole plasma layer on the wafer, changing the wafer's dielectric constant, turning the third port into a termination for incident RF signals, and. causing all incident RF signals to be reflected from the surface of the wafer. The propagation constant of RF signals through port 3, therefore, can be changed by controlling the beam. By making the RF coupling to the third port as small as necessary, one can reduce the peak electric field on the unexcited silicon surface for any level of input power from port 1, thereby reducing risk of damaging the wafer by RF with high peak power. The switch is useful to the construction of an improved pulse compression system to boost the peak power of microwave tubes driving linear accelerators. In this application, the high-power RF switch is placed at the coupling iris between the charging waveguide and the resonant storage line of a pulse compression system. This optically controlled high power RF pulse compression system can handle hundreds of Megawatts of power at X-band.

  1. Construction of Generalized Connections

    E-Print Network [OSTI]

    Christian Fleischhack

    2006-01-02T23:59:59.000Z

    We present a construction method for mappings between generalized connections, comprising, e.g., the action of gauge transformations, diffeomorphisms and Weyl transformations. Moreover, criteria for continuity and measure preservation are stated.

  2. General Engineer (Chief Engineer)

    Broader source: Energy.gov [DOE]

    This position is located in the Office of the Manager. If selected for this position you will serve as a General Engineer (Chief Engineer) in the Office of the Manager for the Department of Energy,...

  3. General com Technology community

    E-Print Network [OSTI]

    Ferrara, Katherine W.

    Campus IT General com m unity Technology community ITsystem owners Campus Council for Information Technology (CCFIT) · ~30 members · Advisory evaluation and review role · Input from faculty, staff, students formal representation on steering team and subcommittees Technology Support Program · Technology support

  4. General relativity and experiment

    E-Print Network [OSTI]

    T. Damour

    1994-12-08T23:59:59.000Z

    The confrontation between Einstein's theory of gravitation and experiment is summarized. Although all current experimental data are compatible with general relativity, the importance of pursuing the quest for possible deviations from Einstein's theory is emphasized.

  5. Generalizing twisted gauge invariance

    SciTech Connect (OSTI)

    Duenas-Vidal, Alvaro; Vazquez-Mozo, Miguel A. [Departamento de Fisica Fundamental, Universidad de Salamanca, Plaza de la Merced s/n, E-37008 Salamanca (Spain)

    2009-05-01T23:59:59.000Z

    We discuss the twisting of gauge symmetry in noncommutative gauge theories and show how this can be generalized to a whole continuous family of twisted gauge invariances. The physical relevance of these twisted invariances is discussed.

  6. Generalized Concatenated Quantum Codes

    E-Print Network [OSTI]

    Markus Grassl; Peter Shor; Graeme Smith; John Smolin; Bei Zeng

    2009-01-09T23:59:59.000Z

    We introduce the concept of generalized concatenated quantum codes. This generalized concatenation method provides a systematical way for constructing good quantum codes, both stabilizer codes and nonadditive codes. Using this method, we construct families of new single-error-correcting nonadditive quantum codes, in both binary and nonbinary cases, which not only outperform any stabilizer codes for finite block length, but also asymptotically achieve the quantum Hamming bound for large block length.

  7. Generalized Fusion Potentials

    E-Print Network [OSTI]

    Ofer Aharony

    1993-01-31T23:59:59.000Z

    Recently, DiFrancesco and Zuber have characterized the RCFTs which have a description in terms of a fusion potential in one variable, and proposed a generalized potential to describe other theories. In this note we give a simple criterion to determine when such a generalized description is possible. We also determine which RCFTs can be described by a fusion potential in more than one variable, finding that in fact all RCFTs can be described in such a way, as conjectured by Gepner.

  8. Sparsity-based optimization of two lifting-based wavelet transforms for semi-regular mesh compression

    E-Print Network [OSTI]

    Boyer, Edmond

    , and consequently high compression performances. In computer graphics, the compact representation is not the sole

  9. Combustion in Homogeneous Charge Compression Ignition Engines: Experiments and Detailed Chemical Kinetic Simulations

    SciTech Connect (OSTI)

    Flowers, D L

    2002-06-07T23:59:59.000Z

    Homogeneous charge compression ignition (HCCI) engines are being considered as an alternative to diesel engines. The HCCI concept involves premixing fuel and air prior to induction into the cylinder (as is done in current spark-ignition engine) then igniting the fuel-air mixture through the compression process (as is done in current diesel engines). The combustion occurring in an HCCI engine is fundamentally different from a spark-ignition or Diesel engine in that the heat release occurs as a global autoignition process, as opposed to the turbulent flame propagation or mixing controlled combustion used in current engines. The advantage of this global autoignition is that the temperatures within the cylinder are uniformly low, yielding very low emissions of oxides of nitrogen (NO{sub x}, the chief precursors to photochemical smog). The inherent features of HCCI combustion allows for design of engines with efficiency comparable to, or potentially higher than, diesel engines. While HCCI engines have great potential, several technical barriers exist which currently prevent widespread commercialization of this technology. The most significant challenge is that the combustion timing cannot be controlled by typical in-cylinder means. Means of controlling combustion have been demonstrated, but a robust control methodology that is applicable to the entire range of operation has yet to be developed. This research focuses on understanding basic characteristics of controlling and operating HCCI engines. Experiments and detailed chemical kinetic simulations have been applied to the characterize some of the fundamental operational and design characteristics of HCCI engines. Experiments have been conducted on single and multi-cylinder engines to investigate general features of how combustion timing affects the performance and emissions of HCCI engines. Single-zone modeling has been used to characterize and compare the implementation of different control strategies. Multi-zone modeling has been applied to investigate combustion chamber design with respect to increasing efficiency and reducing emissions in HCCI engines.

  10. Recent Photovoltaic Performance Data in the USA (Presentation)

    SciTech Connect (OSTI)

    Jordan, D.

    2014-03-01T23:59:59.000Z

    This paper presents performance data from nearly 50,000 Photovoltaic systems totaling 1.7 Gigawatts installed capacity in the USA from 2009 to 2012. 90% of the systems performed to within 10% or better of expected performance. Only 2-4% of the data indicate issues significantly affecting the system performance. Special causes of underperformance and their impacts are delineated by reliability category. Delays and interconnections dominate project-related issues particularly in the first year, but total less than 0.5% of all systems. Hardware-related issues are dominated by inverter problems totaling less than 0.4% and underperforming modules to less than 0.1%.

  11. File:INL-geothermal-west-usa.pdf | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdf Jump to: navigation,SizeEthiopiametstak.pdf Jump to:nv.pdf Jump100west-usa.pdf

  12. LES' URENCO-USA Facility | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOil & Gas » MethaneJohnsonKristina Pflanz About UsT8LES' URENCO-USA

  13. USA Science and Engineering Festival: Inspiring and Educating the Clean

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your DensityEnergy U.S.-China Electric Vehicle and BatteryUS-EU-Japan Working Group on CriticalJapanUSA

  14. FUJIFILM Hunt Chemicals U.S.A. Achieves Compressed Air System Energy-Reduction Goals with a Three-Phased Strategy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport in Representative GeologicReportingEnergy3, SupplementalFUJIFILM Hunt

  15. SHORT COMMUNICATIONS GeneralBiology

    E-Print Network [OSTI]

    Martin, Paul R.

    Ornithological Society NESTING BEHAVIOR OF THE SLATE-COLORED SEEDEATER (SPOROPHILA SCHISTACEA) IN PANAMA Bridget, Smithsonian Institution, Washington D.C. 20008, U.S.A. Key words: Slate-colored Seedeater, Sporophila schistacea, courtship behavio1; paren tal care. The nesting behavior of the Slate-colored See- deater

  16. Comparing the effects of various fuel alcohols on the natural attenuation of Benzene Plumes using a general substrate interaction model

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    and Environmental Engineering, Rice University, MS-317, 6100 Main St., Houston, TX 77005, USA a r t i c l e i n f o a b s t r a c t Article history: Received 30 October 2009 Received in revised form 26 January 2010 generalizations about the level of impact of specific fuel alcohols on benzene plume dynamics. © 2010 Elsevier B

  17. Noncommutative General Relativity

    E-Print Network [OSTI]

    Xavier Calmet; Archil Kobakhidze

    2005-06-27T23:59:59.000Z

    We define a theory of noncommutative general relativity for canonical noncommutative spaces. We find a subclass of general coordinate transformations acting on canonical noncommutative spacetimes to be volume-preserving transformations. Local Lorentz invariance is treated as a gauge theory with the spin connection field taken in the so(3,1) enveloping algebra. The resulting theory appears to be a noncommutative extension of the unimodular theory of gravitation. We compute the leading order noncommutative correction to the action and derive the noncommutative correction to the equations of motion of the weak gravitation field.

  18. Noncommutative general relativity

    SciTech Connect (OSTI)

    Calmet, Xavier [Service de Physique Theorique, Universite Libre de Bruxelles, CP225, Boulevard du Triomphe (Campus plaine), B-1050 Brussels (Belgium); Kobakhidze, Archil [Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 (United States); Andronikashvili Institute of Physics, 0177 Tbilisi, Georgia (United States)

    2005-08-15T23:59:59.000Z

    We define a theory of noncommutative general relativity for canonical noncommutative spaces. We find a subclass of general coordinate transformations acting on canonical noncommutative spacetimes to be volume-preserving transformations. Local Lorentz invariance is treated as a gauge theory with the spin connection field taken in the so(3,1) enveloping algebra. The resulting theory appears to be a noncommutative extension of the unimodular theory of gravitation. We compute the leading order noncommutative correction to the action and derive the noncommutative correction to the equations of motion of the weak gravitation field.

  19. 8Li General Tables

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032) -Less isNFebruaryOctober 2, AlgeriaQ1 Q2 Q3 U . SHe GeneralLi

  20. OMAE2014 June 8-13, 2014, San Francisco, California, USA OMAE2014...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Offshore and Arctic Engineering OMAE2014 June 8-13, 2014, San Francisco, California, USA OMAE2014-24175 Hydrodynamic Module Coupling in the Offshore Wind Energy Simulation...

  1. General Syllabus Physics 45100

    E-Print Network [OSTI]

    Lombardi, John R.

    General Syllabus Physics 45100 Thermodynamics and Statistical Physics Designation: Undergraduate Catalog description: 45100: Thermodynamics and Statistical Physics Temperature; equation of state; work and statistical mechanics; low-temperature physics; the Third Law. 3 HR./Wk.; 3 CR. Prerequisites: Physics 35100

  2. DRILLING MACHINES GENERAL INFORMATION

    E-Print Network [OSTI]

    Gellman, Andrew J.

    TC 9-524 Chapter 4 DRILLING MACHINES GENERAL INFORMATION PURPOSE This chapter contains basic information pertaining to drilling machines. A drilling machine comes in many shapes and sizes, from small hand-held power drills to bench mounted and finally floor-mounted models. They can perform operations

  3. Communication Definitions... general definition

    E-Print Network [OSTI]

    Jones, Ian L.

    Communication Definitions... general definition "the process of conveying information from a sender to a receiver with the use of a medium in which the communicated information is understood the same way by both sender and receiver" (Wikipedia)! Biological communication Action by one organism (individual

  4. Generalization of Conformal Transformations

    E-Print Network [OSTI]

    G. I. Garas'ko

    2005-09-19T23:59:59.000Z

    Conformal transformations of a Euclidean (complex) plane have some kind of completeness (sufficiency) for the solution of many mathematical and physical-mathematical problems formulated on this plane. There is no such completeness in the case of Euclidean, pseudo-Euclidean and polynumber spaces of dimension greater than two. In the present paper we show that using the concepts of analogical geometries allows us to generalize conformal transformations not only to the case of Euclidean or pseudo-Euclidean spaces, but also to the case of Finsler spaces, analogous to the spaces of affine connectedness. Examples of such transformations in the case of complex and hypercomplex numbers H_4 are presented. In the general case such transformations form a group of transitions, the elements of which can be viewed as transitions between projective Euclidean geometries of a distinguished class fixed by the choice of metric geometry admitting affine coordinates. The correlation between functions realizing generalized conformal transformations and generalized analytical functions can appear to be productive for the solution of fundamental problems in theoretical and mathematical physics.

  5. GENERAL CIRCULATION Energy Cycle

    E-Print Network [OSTI]

    Grotjahn, Richard

    process. PE is useful for global energy balance. Solar radiant energy does not reach the Earth equally everywhere. On average, the tropics receive and absorb far more solar energy annually than the polar regionsGENERAL CIRCULATION Contents Energy Cycle Mean Characteristics Momentum Budget Overview Energy

  6. Optimization Under Generalized Uncertainty

    E-Print Network [OSTI]

    Lodwick, Weldon

    11 Optimization Under Generalized Uncertainty Optimization Modeling Math 4794/5794: Spring 2013 Weldon A. Lodwick Weldon.Lodwick@ucdenver.edu 2/14/2013 Optimization Modeling - Spring 2013 #12 in the context of optimization problems. The theoretical frame-work for these notes is interval analysis. From

  7. Control of high power pulse extracted from the maximally compressed pulse in a nonlinear optical fiber

    E-Print Network [OSTI]

    Yang, Guangye; Jia, Suotang; Mihalache, Dumitru

    2013-01-01T23:59:59.000Z

    We address the possibility to control high power pulses extracted from the maximally compressed pulse in a nonlinear optical fiber by adjusting the initial excitation parameters. The numerical results show that the power, location and splitting order number of the maximally compressed pulse and the transmission features of high power pulses extracted from the maximally compressed pulse can be manipulated through adjusting the modulation amplitude, width, and phase of the initial Gaussian-type perturbation pulse on a continuous wave background.

  8. The Prospects of Alternatives to Vapor Compression Technology for Space Cooling and Food Refrigeration Applications

    SciTech Connect (OSTI)

    Brown, Daryl R.; Dirks, James A.; Fernandez, Nicholas; Stout, Tyson E.

    2010-03-31T23:59:59.000Z

    Five alternatives to vapor compression technology were qualitatively evaluated to determine their prospects for being better than vapor compression for space cooling and food refrigeration applications. The results of the assessment are summarized in the report. Overall, thermoacoustic and magnetic technologies were judged to have the best prospects for competing with vapor compression technology, with thermotunneling, thermoelectric, and thermionic technologies trailing behind in that order.

  9. A correlation of rock compressibility with temperature and pressure

    E-Print Network [OSTI]

    Choudhary, Bijoy Kumar

    1967-01-01T23:59:59.000Z

    reservoir rocks to higher temperatures. Tests were conducted on 17 specimens cut from 5 sandstone cores and 0 4 specimens cut from one limestone core at temperatures of 76 F, 0 0 0 200 F, 300 F, and 400 F and at pressures ranging from 100-14, 000 0 psi.... The net change in 0 0 pore volume from 100-14, 000 psi ranges between 4. 0 /o and 9. 6 /o 0 0 at room temperature and 5. 1 ? 14. 1 /o at 400 F. A definite trend was established between pore volume compressibility and porosity of the specimens tested...

  10. Compressive Radar with Off-Grid and Extended Targets

    E-Print Network [OSTI]

    Fannjiang, Albert

    2012-01-01T23:59:59.000Z

    Compressed sensing (CS) schemes are proposed for monostatic as well as synthetic aperture radar (SAR) imaging of sparse targets with chirps. In particular, a simple method is developed to improve performance with off-grid targets. Tomographic formulation of spotlight SAR is analyzed by CS methods with several bases and under various bandwidth constraints. Performance guarantees are established via coherence bound and the restricted isometry property. CS analysis provides a fresh and clear perspective on how to optimize temporal and angular samplings for spotlight SAR.

  11. Exhaust gas recirculation in a homogeneous charge compression ignition engine

    DOE Patents [OSTI]

    Duffy, Kevin P. (Metamora, IL); Kieser, Andrew J. (Morton, IL); Rodman, Anthony (Chillicothe, IL); Liechty, Michael P. (Chillicothe, IL); Hergart, Carl-Anders (Peoria, IL); Hardy, William L. (Peoria, IL)

    2008-05-27T23:59:59.000Z

    A homogeneous charge compression ignition engine operates by injecting liquid fuel directly in a combustion chamber, and mixing the fuel with recirculated exhaust and fresh air through an auto ignition condition of the fuel. The engine includes at least one turbocharger for extracting energy from the engine exhaust and using that energy to boost intake pressure of recirculated exhaust gas and fresh air. Elevated proportions of exhaust gas recirculated to the engine are attained by throttling the fresh air inlet supply. These elevated exhaust gas recirculation rates allow the HCCI engine to be operated at higher speeds and loads rendering the HCCI engine a more viable alternative to a conventional diesel engine.

  12. Controlling And Operating Homogeneous Charge Compression Ignition (Hcci) Engines

    DOE Patents [OSTI]

    Flowers, Daniel L. (San Leandro, CA)

    2005-08-02T23:59:59.000Z

    A Homogeneous Charge Compression Ignition (HCCI) engine system includes an engine that produces exhaust gas. A vaporization means vaporizes fuel for the engine an air induction means provides air for the engine. An exhaust gas recirculation means recirculates the exhaust gas. A blending means blends the vaporized fuel, the exhaust gas, and the air. An induction means inducts the blended vaporized fuel, exhaust gas, and air into the engine. A control means controls the blending of the vaporized fuel, the exhaust gas, and the air and for controls the inducting the blended vaporized fuel, exhaust gas, and air into the engine.

  13. Coherent structures in compressible free-shear-layer flows

    SciTech Connect (OSTI)

    Aeschliman, D.P.; Baty, R.S. [Sandia National Labs., Albuquerque, NM (United States). Engineering Sciences Center; Kennedy, C.A.; Chen, J.H. [Sandia National Labs., Livermore, CA (United States). Combustion and Physical Sciences Center

    1997-08-01T23:59:59.000Z

    Large scale coherent structures are intrinsic fluid mechanical characteristics of all free-shear flows, from incompressible to compressible, and laminar to fully turbulent. These quasi-periodic fluid structures, eddies of size comparable to the thickness of the shear layer, dominate the mixing process at the free-shear interface. As a result, large scale coherent structures greatly influence the operation and efficiency of many important commercial and defense technologies. Large scale coherent structures have been studied here in a research program that combines a synergistic blend of experiment, direct numerical simulation, and analysis. This report summarizes the work completed for this Sandia Laboratory-Directed Research and Development (LDRD) project.

  14. Wave motions in unbounded poroelastic solids infused with compressible fluids

    E-Print Network [OSTI]

    Quiligotti, S; dell'Isola, F

    2010-01-01T23:59:59.000Z

    Looking at rational solid-fluid mixture theories in the context of their biomechanical perspectives, this work aims at proposing a two-scale constitutive theory of a poroelastic solid infused with an inviscid compressible fluid. The propagation of steady-state harmonic plane waves in unbounded media is investigated in both cases of unconstrained solid-fluid mixtures and fluid-saturated poroelastic solids. Relevant effects on the resulting characteristic speed of longitudinal and transverse elastic waves, due to the constitutive parameters introduced, are finally highlighted and discussed.

  15. Compressed Natural Gas and Hydrogen Fuels Workshop | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube platformBuildingCoalComplex Flow Workshop Report JanuarySystem ControlCompressed

  16. IEEE POWER ENGINEERING SOCIETY GENERAL MEETING, PITTSBURGH, PA USA JULY 2008 1 Initial review of methods for cascading failure

    E-Print Network [OSTI]

    Dobson, Ian

    example is hidden failures in protection relays that disconnect components unnecessarily when overloaded). It can also be due to control or protection devices (both hardware and software) that react

  17. Copyright 2010 IEEE. Reprinted from Proceedings of the 2010 IEEE Power & Energy Society General Meeting, Minneapolis, MN, USA.

    E-Print Network [OSTI]

    Kemner, Ken

    . A majority of the wind power in the United States is sold on long-term power purchase agreements, which hedgeCopyright © 2010 IEEE. Reprinted from Proceedings of the 2010 IEEE Power & Energy Society;1 Abstract--This paper discusses risk management, contracting, and bidding for a wind power producer

  18. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange

    DOE Patents [OSTI]

    McBride, Troy O; Bell, Alexander; Bollinger, Benjamin R; Shang, Andrew; Chmiel, David; Richter, Horst; Magari, Patrick; Cameron, Benjamin

    2013-07-02T23:59:59.000Z

    In various embodiments, efficiency of energy storage and recovery systems compressing and expanding gas is improved via heat exchange between the gas and a heat-transfer fluid.

  19. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange

    DOE Patents [OSTI]

    McBride, Troy O.; Bell, Alexander; Bollinger, Benjamin R.

    2012-08-07T23:59:59.000Z

    In various embodiments, efficiency of energy storage and recovery systems compressing and expanding gas is improved via heat exchange between the gas and a heat-transfer fluid.

  20. Method of controlling coherent synchroton radiation-driven degradation of beam quality during bunch length compression

    DOE Patents [OSTI]

    Douglas, David R. (Newport News, VA); Tennant, Christopher D. (Williamsburg, VA)

    2012-07-10T23:59:59.000Z

    A method of avoiding CSR induced beam quality defects in free electron laser operation by a) controlling the rate of compression and b) using a novel means of integrating the compression with the remainder of the transport system: both are accomplished by means of dispersion modulation. A large dispersion is created in the penultimate dipole magnet of the compression region leading to rapid compression; this large dispersion is demagnified and dispersion suppression performed in a final small dipole. As a result, the bunch is short for only a small angular extent of the transport, and the resulting CSR excitation is small.