National Library of Energy BETA

Sample records for group downhole techniques

  1. Downhole drilling network using burst modulation techniques

    DOE Patents [OSTI]

    Hall; David R. (Provo, UT), Fox; Joe (Spanish Fork, UT)

    2007-04-03

    A downhole drilling system is disclosed in one aspect of the present invention as including a drill string and a transmission line integrated into the drill string. Multiple network nodes are installed at selected intervals along the drill string and are adapted to communicate with one another through the transmission line. In order to efficiently allocate the available bandwidth, the network nodes are configured to use any of numerous burst modulation techniques to transmit data.

  2. Downhole Techniques | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstrumentsArea (DOEDixmont,Missouri:Dow ChemicalDownersTechniques Jump

  3. Downhole tool

    DOE Patents [OSTI]

    Hall, David R.; Muradov, Andrei; Pixton, David S.; Dahlgren, Scott Steven; Briscoe, Michael A.

    2007-03-20

    A double shouldered downhole tool connection comprises box and pin connections having mating threads intermediate mating primary and secondary shoulders. The connection further comprises a secondary shoulder component retained in the box connection intermediate a floating component and the primary shoulders. The secondary shoulder component and the pin connection cooperate to transfer a portion of makeup load to the box connection. The downhole tool may be selected from the group consisting of drill pipe, drill collars, production pipe, and reamers. The floating component may be selected from the group consisting of electronics modules, generators, gyroscopes, power sources, and stators. The secondary shoulder component may comprises an interface to the box connection selected from the group consisting of radial grooves, axial grooves, tapered grooves, radial protrusions, axial protrusions, tapered protrusions, shoulders, and threads.

  4. Acoustical Communications for Wireless Downhole Telemetry Systems 

    E-Print Network [OSTI]

    Farraj, Abdallah

    2012-08-22

    This dissertation investigates the use of advanced acoustical communication techniques for wireless downhole telemetry systems. Using acoustic waves for downhole telemetry systems is investigated in order to replace the wired communication systems...

  5. The use of pattern recognition techniques in analyzing down-hole dynamometer cards 

    E-Print Network [OSTI]

    Dickinson, Roderick Raymond

    1987-01-01

    by presenting four pattern matching methods which can be used to diagnose the down-hole condition of sucker rod pumped wells. Of the four methods programmed and tested, three use a deterministic approach to solve the pattern recognition problem while... the fourth uses a syntactic approach. Deterministic methods are designed to match the input pattern with a series of templates representing various reference classes. A minimum-distance classifier is used to select the reference class which best matches...

  6. Feasibility and Design Studies for a High Temperature Downhole Tool

    Office of Energy Efficiency and Renewable Energy (EERE)

    Project objective: Perform feasibility and design studies for a high temperature downhole tool; which uses nuclear techniques for characterization purposes; using measurements and modeling/simulation.

  7. Downhole telemetry system

    DOE Patents [OSTI]

    Normann, R.A.; Kadlec, E.R.

    1994-11-08

    A downhole telemetry system is described for optically communicating to the surface operating parameters of a drill bit during ongoing drilling operations. The downhole telemetry system includes sensors mounted with a drill bit for monitoring at least one operating parameter of the drill bit and generating a signal representative thereof. The downhole telemetry system includes means for transforming and optically communicating the signal to the surface as well as means at the surface for producing a visual display of the optically communicated operating parameters of the drill bit. 7 figs.

  8. Downhole telemetry system

    DOE Patents [OSTI]

    Normann, Randy A. (Albuquerque, NM); Kadlec, Emil R. (Albuquerque, NM)

    1994-01-01

    A downhole telemetry system is described for optically communicating to the surface operating parameters of a drill bit during ongoing drilling operations. The downhole telemetry system includes sensors mounted with a drill bit for monitoring at least one operating parameter of the drill bit and generating a signal representative thereof. The downhole telemetry system includes means for transforming and optically communicating the signal to the surface as well as means at the surface for producing a visual display of the optically communicated operating parameters of the drill bit.

  9. Downhole Data Transmission System

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2004-04-06

    A system for transmitting data through a string of down-hole components. In accordance with one aspect, the system includes a plurality of downhole components, such as sections of pipe in a drill string. Each downhole component includes a pin end and a box end, with the pin end of one downhole component being adapted to be connected to the box end of another. Each pin end includes external threads and an internal pin face distal to the external threads. Each box end includes an internal shoulder face with internal threads distal to the internal shoulder face. The internal pin face and the internal shoulder face are aligned with and proximate each other when the pin end of the one component is threaded into a box end of the other component.

  10. Downhole steam quality measurement

    DOE Patents [OSTI]

    Lee, David O. (Albuquerque, NM); Montoya, Paul C. (Albuquerque, NM); Muir, James F. (Albuquerque, NM); Wayland, Jr., J. Robert (Albuquerque, NM)

    1987-01-01

    An empirical method for the remote sensing of steam quality that can be easily adapted to downhole steam quality measurements by measuring the electrical properties of two-phase flow across electrode grids at low frequencies.

  11. Three phase downhole separator process

    DOE Patents [OSTI]

    Cognata, Louis John (Baytown, TX)

    2008-06-24

    Three Phase Downhole Separator Process (TPDSP) is a process which results in the separation of all three phases, (1) oil, (2) gas, and (3) water, at the downhole location in the well bore, water disposal injection downhole, and oil and gas production uphole.

  12. Downhole transmission system

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2008-01-15

    A transmission system in a downhole component comprises a data transmission element in both ends of the downhole component. Each data transmission element houses an electrically conducting coil in a MCEI circular trough. An electrical conductor connects both the transmission elements. The electrical conductor comprises at least three electrically conductive elements insulated from each other. In the preferred embodiment the electrical conductor comprises an electrically conducting outer shield, an electrically conducting inner shield and an electrical conducting core. In some embodiments of the present invention, the electrical conductor comprises an electrically insulating jacket. In other embodiments, the electrical conductor comprises a pair of twisted wires. In some embodiments, the electrical conductor comprises semi-conductive material.

  13. Distributed downhole drilling network

    DOE Patents [OSTI]

    Hall, David R.; Hall, Jr., H. Tracy; Fox, Joe; Pixton, David S.

    2006-11-21

    A high-speed downhole network providing real-time data from downhole components of a drilling strings includes a bottom-hole node interfacing to a bottom-hole assembly located proximate the bottom end of a drill string. A top-hole node is connected proximate the top end of the drill string. One or several intermediate nodes are located along the drill string between the bottom-hole node and the top-hole node. The intermediate nodes are configured to receive and transmit data packets transmitted between the bottom-hole node and the top-hole node. A communications link, integrated into the drill string, is used to operably connect the bottom-hole node, the intermediate nodes, and the top-hole node. In selected embodiments, a personal or other computer may be connected to the top-hole node, to analyze data received from the intermediate and bottom-hole nodes.

  14. Downhole Fluid Analyzer Development

    SciTech Connect (OSTI)

    Bill Turner

    2006-11-28

    A novel fiber optic downhole fluid analyzer has been developed for operation in production wells. This device will allow real-time determination of the oil, gas and water fractions of fluids from different zones in a multizone or multilateral completion environment. The device uses near infrared spectroscopy and induced fluorescence measurement to unambiguously determine the oil, water and gas concentrations at all but the highest water cuts. The only downhole components of the system are the fiber optic cable and windows. All of the active components--light sources, sensors, detection electronics and software--will be located at the surface, and will be able to operate multiple downhole probes. Laboratory testing has demonstrated that the sensor can accurately determine oil, water and gas fractions with a less than 5 percent standard error. Once installed in an intelligent completion, this sensor will give the operating company timely information about the fluids arising from various zones or multilaterals in a complex completion pattern, allowing informed decisions to be made on controlling production. The research and development tasks are discussed along with a market analysis.

  15. Downhole pulse tube refrigerators

    SciTech Connect (OSTI)

    Swift, G.; Gardner, D.

    1997-12-01

    This report summarizes a preliminary design study to explore the plausibility of using pulse tube refrigeration to cool instruments in a hot down-hole environment. The original motivation was to maintain Dave Reagor`s high-temperature superconducting electronics at 75 K, but the study has evolved to include three target design criteria: cooling at 30 C in a 300 C environment, cooling at 75 K in a 50 C environment, cooling at both 75 K and 30 C in a 250 C environment. These specific temperatures were chosen arbitrarily, as representative of what is possible. The primary goals are low cost, reliability, and small package diameter. Pulse-tube refrigeration is a rapidly growing sub-field of cryogenic refrigeration. The pulse tube refrigerator has recently become the simplest, cheapest, most rugged and reliable low-power cryocooler. The authors expect this technology will be applicable downhole because of the ratio of hot to cold temperatures (in absolute units, such as Kelvin) of interest in deep drilling is comparable to the ratios routinely achieved with cryogenic pulse-tube refrigerators.

  16. Downhole thermoacoustic device

    SciTech Connect (OSTI)

    Kuznetsov, O. L.; Malchenok, V. O.; Maxutov, R. A.; Mordukhaev, K. M.; Ostrovsky, A. P.

    1985-12-17

    A downhole thermoacoustic device comprises a heater with a terminal chamber, connected to a source or radiator of acoustic oscillation, including a hollow housing having mounted therein a longitudinal shaft carrying coils with cores in the form of a plurality of flat rings of a magnetostrictive material, operable as the active elements adapted to generate acoustic oscillation. Accommodated intermediate the coils is a member for focusing the acoustic field, in the form of a sleeve, while the longitudinal shaft carries a tube-shaped reflector of acoustic oscillation internally of the core of each coil. The top and bottom portions of the hollow housing of the radiator of acoustic oscillation have mounted therein damping elements including sleeves of a resilient material, while a heat-insulating member including a sleeve with a fluted surface is provided intermediate the terminal chamber of the heater and the hollow housing of the radiator.

  17. Downhole Data Transmission System

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2003-12-30

    A system for transmitting data through a string of downhole components. In one aspect, the system includes first and second magnetically conductive, electrically insulating elements at both ends of the component. Each element includes a first U-shaped trough with a bottom, first and second sides and an opening between the two sides. Electrically conducting coils are located in each trough. An electrical conductor connects the coils in each component. In operation, a varying current applied to a first coil in one component generates a varying magnetic field in the first magnetically conductive, electrically insulating element, which varying magnetic field is conducted to and thereby produces a varying magnetic field in the second magnetically conductive, electrically insulating element of a connected component, which magnetic field thereby generates a varying electrical current in the second coil in the connected component.

  18. Downhole steam quality measurement

    DOE Patents [OSTI]

    Lee, D.O.; Montoya, P.C.; Muir, J.F.; Wayland, J.R. Jr.

    1985-06-19

    The present invention relates to an empirical electrical method for remote sensing of steam quality utilizing flow-through grids which allow measurement of the electrical properties of a flowing two-phase mixture. The measurement of steam quality in the oil field is important to the efficient application of steam assisted recovery of oil. Because of the increased energy content in higher quality steam it is important to maintain the highest possible steam quality at the injection sandface. The effectiveness of a steaming operation without a measure of steam quality downhole close to the point of injection would be difficult to determine. Therefore, a need exists for the remote sensing of steam quality.

  19. Downhole hydraulic seismic generator

    DOE Patents [OSTI]

    Gregory, Danny L. (Corrales, NM); Hardee, Harry C. (Albuquerque, NM); Smallwood, David O. (Albuquerque, NM)

    1992-01-01

    A downhole hydraulic seismic generator system for transmitting energy wave vibrations into earth strata surrounding a borehole. The system contains an elongated, unitary housing operably connected to a well head aboveground by support and electrical cabling, and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a hydraulic oscillator containing a double-actuating piston whose movement is controlled by an electro-servovalve regulating a high pressure hydraulic fluid flow into and out of upper and lower chambers surrounding the piston. The spent hydraulic fluid from the hydraulic oscillator is stored and pumped back into the system to provide high pressure fluid for conducting another run at the same, or a different location within the borehole.

  20. Downhole tool adapted for telemetry

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Provo, UT)

    2010-12-14

    A cycleable downhole tool such as a Jar, a hydraulic hammer, and a shock absorber adapted for telemetry. This invention applies to other tools where the active components of the tool are displaced when the tool is rotationally or translationally cycled. The invention consists of inductive or contact transmission rings that are connected by an extensible conductor. The extensible conductor permits the transmission of the signal before, after, and during the cycling of the tool. The signal may be continuous or intermittent during cycling. The invention also applies to downhole tools that do not cycle, but in operation are under such stress that an extensible conductor is beneficial. The extensible conductor may also consist of an extensible portion and a fixed portion. The extensible conductor also features clamps that maintain the conductor under stresses greater than that seen by the tool, and seals that are capable of protecting against downhole pressure and contamination.

  1. Transducer for downhole drilling components

    DOE Patents [OSTI]

    Hall, David R; Fox, Joe R

    2006-05-30

    A robust transmission element for transmitting information between downhole tools, such as sections of drill pipe, in the presence of hostile environmental conditions, such as heat, dirt, rocks, mud, fluids, lubricants, and the like. The transmission element maintains reliable connectivity between transmission elements, thereby providing an uninterrupted flow of information between drill string components. A transmission element is mounted within a recess proximate a mating surface of a downhole drilling component, such as a section of drill pipe. The transmission element may include an annular housing forming a trough, an electrical conductor disposed within the trough, and an MCEI material disposed between the annular housing and the electrical conductor.

  2. Battery switch for downhole tools

    DOE Patents [OSTI]

    Boling, Brian E. (Sugar Land, TX)

    2010-02-23

    An electrical circuit for a downhole tool may include a battery, a load electrically connected to the battery, and at least one switch electrically connected in series with the battery and to the load. The at least one switch may be configured to close when a tool temperature exceeds a selected temperature.

  3. DOWNHOLE ENTHALPY MEASUREMENT IN GEOTHERMAL

    E-Print Network [OSTI]

    Stanford University

    SGP-TR-186 DOWNHOLE ENTHALPY MEASUREMENT IN GEOTHERMAL WELLS WITH FIBER OPTICS Nilufer Atalay June 2008 Financial support was provided through the Stanford Geothermal Program under Idaho National University Stanford Geothermal Program Interdisciplinary Research in Engineering and Earth Sciences STANFORD

  4. Downhole steam generator having a downhole oxidant compressor

    DOE Patents [OSTI]

    Fox, R.L.

    1981-01-07

    Am improved apparatus is described for the downhole injection of steam into boreholes, for tertiary oil recovery. It includes an oxidant supply, a fuel supply, an igniter, a water supply, an oxidant compressor, and a combustor assembly. The apparatus is designed for efficiency, preheating of the water, and cooling of the combustion chamber walls. The steam outlet to the borehole is provided with pressure-responsive doors for closing the outlet in response to flameout. (DLC)

  5. Advanced downhole periodic seismic generator

    DOE Patents [OSTI]

    Hardee, Harry C. (Albuquerque, NM); Hills, Richard G. (Las Cruces, NM); Striker, Richard P. (Albuquerque, NM)

    1991-07-16

    An advanced downhole periodic seismic generator system for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

  6. Multipurpose Acoustic Sensor for Downhole Fluid Monitoring |...

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

    Geothermal Ultrasonic Fracture Imager Waveguide-based Ultrasonic and Far-field Electromagnetic Sensors for Downhole Reservoir Characterization High Temperature ESP Monitoring...

  7. Downhole component with a pressure equalization passageway

    SciTech Connect (OSTI)

    Hall, David R.; Pixton, David S.; Dahlgren, Scott; Reynolds, Jay T.; Breihan, James W.; Briscoe, Michael A.

    2006-08-22

    The present invention includes a downhole component adapted for transmitting downhole data. The downhole component includes a threaded end on a downhole component. The threaded end furthermore includes an interior region, and exterior region, and a mating surface wherein a cavity is formed. A data transmission element is disposed in the cavity and displaces a volume of the cavity. At least one passageway is formed in the threaded region between interior and exterior regions. The passageway is in fluid communication with both the interior and exterior regions and thereby relieves pressure build up of thread lubricant upon tool joint make up.

  8. Multipurpose Acoustic Sensor for Downhole Fluid Monitoring

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

    Alamos National Laboratory High Temperature Tools and Sensors, Down-hole Pumps and Drilling May 19, 2010 This presentation does not contain any proprietary confidential, or...

  9. Downhole material injector for lost circulation control

    DOE Patents [OSTI]

    Glowka, D.A.

    1991-01-01

    This invention is comprised of an apparatus and method for simultaneously and separately emplacing two streams of different materials through a drillstring in a borehole to a downhole location for lost circulation control. The two streams are mixed outside the drillstring at the desired downhole location and harden only after mixing for control of a lost circulation zone.

  10. Downhole material injector for lost circulation control

    DOE Patents [OSTI]

    Glowka, D.A.

    1994-09-06

    Apparatus and method are disclosed for simultaneously and separately emplacing two streams of different materials through a drill string in a borehole to a downhole location for lost circulation control. The two streams are mixed outside the drill string at the desired downhole location and harden only after mixing for control of a lost circulation zone. 6 figs.

  11. Downhole steam generator having a downhole oxidant compressor

    DOE Patents [OSTI]

    Fox, Ronald L. (Albuquerque, NM)

    1983-01-01

    Apparatus and method for generation of steam in a borehole for penetration into an earth formation wherein a downhole oxidant compressor is used to compress relatively low pressure (atmospheric) oxidant, such as air, to a relatively high pressure prior to mixing with fuel for combustion. The multi-stage compressor receives motive power through a shaft driven by a gas turbine powered by the hot expanding combustion gases. The main flow of compressed oxidant passes through a velocity increasing nozzle formed by a reduced central section of the compressor housing. An oxidant bypass feedpipe leading to peripheral oxidant injection nozzles of the combustion chamber are also provided. The downhole compressor allows effective steam generation in deep wells without need for high pressure surface compressors. Feedback preheater means are provided for preheating fuel in a preheat chamber. Preheating of the water occurs in both a water feed line running from aboveground and in a countercurrent water flow channel surrounding the combustor assembly. The countercurrent water flow channels advantageously serve to cool the combustion chamber wall. The water is injected through slotted inlets along the combustion chamber wall to provide an unstable boundary layer and stripping of the water from the wall for efficient steam generation. Pressure responsive doors are provided at the steam outlet for closing and sealing the combustion chamber from entry of reservoir fluids in the event of a flameout.

  12. Fermionic renormalization group flows Technique and Theory

    E-Print Network [OSTI]

    Heermann, Dieter W.

    of the differential equations for Wilson's renormalization group for the one­particle­irreducible Green functions, such as the projection to the Fermi surface and the calculation of susceptibilities. #12;1 Introduction Renormalization integration corresponding to the grand canonical trace as an iterated integral over degrees of freedom

  13. Category:Downhole Techniques | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButte County,Camilla, Georgia: Energy014771°,NorthCLEAN WebinarNH

  14. Downhole vibration sensing by vibration energy harvesting

    E-Print Network [OSTI]

    Trimble, A. Zachary

    2007-01-01

    This thesis outlines the design of a prototype electromagnetic induction vibration energy harvesting device for use in a downhole environment. First order models of the necessary components for a generic vibration energy ...

  15. Phase-controlled rectification for permanent-magnet downhole alternators

    E-Print Network [OSTI]

    Maher, Patrick L

    2008-01-01

    This thesis develops a method of phase-controlled rectification to be used with permanent-magnet downhole alternators. The design faces unique challenges imposed by the downhole environment. The thesis discusses the design, ...

  16. Advisory Group On The Application Of Nuclear Techniques To Geothermal...

    Open Energy Info (EERE)

    Advisory Group On The Application Of Nuclear Techniques To Geothermal Studies-Meeting In Pisa 8-12 Sep 1975 Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  17. 275 C Downhole Microcomputer System

    SciTech Connect (OSTI)

    Chris Hutchens; Hooi Miin Soo

    2008-08-31

    An HC11 controller IC and along with serial SRAM and ROM support ICs chip set were developed to support a data acquisition and control for extreme temperature/harsh environment conditions greater than 275 C. The 68HC11 microprocessor is widely used in well logging tools for control, data acquisition, and signal processing applications and was the logical choice for a downhole controller. This extreme temperature version of the 68HC11 enables new high temperature designs and additionally allows 68HC11-based well logging tools and MWD tools to be upgraded for high temperature operation in deep gas reservoirs, The microcomputer chip consists of the microprocessor ALU, a small boot ROM, 4 kbyte data RAM, counter/timer unit, serial peripheral interface (SPI), asynchronous serial interface (SCI), and the A, B, C, and D parallel ports. The chip is code compatible with the single chip mode commercial 68HC11 except for the absence of the analog to digital converter system. To avoid mask programmed internal ROM, a boot program is used to load the microcomputer program from an external mask SPI ROM. A SPI RAM IC completes the chip set and allows data RAM to be added in 4 kbyte increments. The HC11 controller IC chip set is implemented in the Peregrine Semiconductor 0.5 micron Silicon-on-Sapphire (SOS) process using a custom high temperature cell library developed at Oklahoma State University. Yield data is presented for all, the HC11, SPI-RAM and ROM. The lessons learned in this project were extended to the successful development of two high temperature versions of the LEON3 and a companion 8 Kbyte SRAM, a 200 C version for the Navy and a 275 C version for the gas industry.

  18. Loaded transducer for downhole drilling components

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT); Daly, Jeffery E. (Cypress, TX)

    2009-05-05

    A system for transmitting information between downhole components has a first downhole component with a first mating surface and a second downhole component having a second mating surface configured to substantially mate with the first mating surface. The system also has a first transmission element with a first communicating surface and is mounted within a recess in the first mating surface. The first transmission element also has an angled surface. The recess has a side with multiple slopes for interacting with the angled surface, each slope exerting a different spring force on the first transmission element. A second transmission element has a second communicating surface mounted proximate the second mating surface and adapted to communicate with the first communicating surface.

  19. Loaded Transducer Fpr Downhole Drilling Component

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT); Fox, Joe (Spanish Fork, UT)

    2005-07-05

    A robust transmission element for transmitting information between downhole tools, such as sections of drill pipe, in the presence of hostile environmental conditions, such as heat, dirt, rocks, mud, fluids, lubricants, and the like. The transmission element maintains reliable connectivity between transmission elements, thereby providing an uninterrupted flow of information between drill string components. A transmission element is mounted within a recess proximate a mating surface of a downhole drilling component, such as a section of drill pipe. To close gaps present between transmission elements, transmission elements may be biased with a "spring force," urging them closer together.

  20. Loaded transducer for downhole drilling components

    DOE Patents [OSTI]

    Hall, David R.; Hall, Jr., H. Tracy; Pixton, David S.; Briscoe, Michael A.; Dahlgren, Scott Steven; Fox, Joe; Sneddon, Cameron

    2006-02-21

    A robust transmission element for transmitting information between downhole tools, such as sections of drill pipe, in the presence of hostile environmental conditions, such as heat, dirt, rocks, mud, fluids, lubricants, and the like. The transmission element maintains reliable connectivity between transmission elements, thereby providing an uninterrupted flow of information between drill string components. A transmission element is mounted within a recess proximate a mating surface of a downhole drilling component, such as a section of drill pipe. To close gaps present between transmission elements, transmission elements may be biased with a "spring force, urging them closer together."

  1. Remote down-hole well telemetry

    DOE Patents [OSTI]

    Briles, Scott D. (Los Alamos, NM); Neagley, Daniel L. (Albuquerque, NM); Coates, Don M. (Santa Fe, NM); Freund, Samuel M. (Los Alamos, NM)

    2004-07-20

    The present invention includes an apparatus and method for telemetry communication with oil-well monitoring and recording instruments located in the vicinity of the bottom of gas or oil recovery pipes. Such instruments are currently monitored using electrical cabling that is inserted into the pipes; cabling has a short life in this environment, and requires periodic replacement with the concomitant, costly shutdown of the well. Modulated reflectance, a wireless communication method that does not require signal transmission power from the telemetry package will provide a long-lived and reliable way to monitor down-hole conditions. Normal wireless technology is not practical since batteries and capacitors have to frequently be replaced or recharged, again with the well being removed from service. RF energy generated above ground can also be received, converted and stored down-hole without the use of wires, for actuating down-hole valves, as one example. Although modulated reflectance reduces or eliminates the loss of energy at the sensor package because energy is not consumed, during the transmission process, additional stored extra energy down-hole is needed.

  2. Expandable Metal Liner For Downhole Components

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe R. (Provo, UT)

    2004-10-05

    A liner for an annular downhole component is comprised of an expandable metal tube having indentations along its surface. The indentations are formed in the wall of the tube either by drawing the tube through a die, by hydroforming, by stamping, or roll forming and may extend axially, radially, or spirally along its wall. The indentations accommodate radial and axial expansion of the tube within the downhole component. The tube is inserted into the annular component and deformed to match an inside surface of the component. The tube may be expanded using a hydroforming process or by drawing a mandrel through the tube. The tube may be expanded in such a manner so as to place it in compression against the inside wall of the component. The tube is useful for improving component hydraulics, shielding components from contamination, inhibiting corrosion, and preventing wear to the downhole component during use. It may also be useful for positioning conduit and insulated conductors within the component. An insulating material may be disposed between the tube and the component in order to prevent galvanic corrosion of the downhole component.

  3. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2003-07-05

    The third quarter of the project was dedicated to creating the detailed design for the manufacturing of the mechanical system for wireless communications and the power generation module. Another emphasis for the quarter was the development of the surface system and acoustic detector for the downhole tool for 2 way communications. The tasks accomplished during this report period were: (1) All detailed drawings for manufacturing of the wireless communications gauge and power generator were completed and the drawings were forward to a machine shop for manufacturing. (2) The power generator was incorporated to the mandrel of the wireless gauge reducing the length of the tool by 25% and manufacturing cost by about 35%. (3) The new piezoelectric acoustic generator was manufactured successfully and it was delivered during this quarter. The assembly provides a new technique to manufacture large diameter piezoelectric based acoustic generators. (4) The acoustic two-way communications development progressed significantly. The real time firmware for the surface system was developed and the processor was able to detect and process the data frame transmitted from downhole. The analog section of the tool was also developed and it is being tested for filtering capabilities and signal detection and amplification. (5) The new transformer to drive the piezoelectric wafer assembly was designed and manufactured. The transformer has been received and it will go through testing and evaluation during the next quarter.

  4. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2003-03-24

    The first quarter of the Downhole Power Generation and Wireless Communications for Intelligent Completions Applications was characterized by the evaluation and determination of the specifications required for the development of the system for permanent applications in wellbores to the optimization of hydrocarbon production. The system will monitor and transmit in real time pressure and temperature information from downhole using the production tubing as the medium for the transmission of the acoustic waves carrying digital information. The most common casing and tubing sizes were determined by interfacing with the major oil companies to obtain information related to their wells. The conceptual design was created for both the wireless gauge section of the tool as well as the power generation module. All hardware for the wireless gauge will be placed in an atmospheric pressure chamber located on the outside of a production tubing with 11.4 centimeter (4-1/2 inch) diameter. This mounting technique will reduce cost as well as the diameter and length of the tool and increase the reliability of the system. The power generator will use piezoelectric wafers to generate electricity based on the flow of hydrocarbons through an area in the wellbore where the tool will be deployed. The goal of the project is to create 1 Watt of power continuously.

  5. Polished Downhole Transducer Having Improved Signal Coupling

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2006-03-28

    Apparatus and methods to improve signal coupling in downhole inductive transmission elements to reduce the dispersion of magnetic energy at the tool joints and to provide consistent impedance and contact between transmission elements located along the drill string. A transmission element for transmitting information between downhole tools is disclosed in one embodiment of the invention as including an annular core constructed of a magnetically conductive material. The annular core forms an open channel around its circumference and is configured to form a closed channel by mating with a corresponding annular core along an annular mating surface. The mating surface is polished to provide improved magnetic coupling with the corresponding annular core. An annular conductor is disposed within the open channel.

  6. Downhole transmission system comprising a coaxial capacitor

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Pixton, David S. (Lehi, UT); Johnson, Monte L. (Orem, UT); Bartholomew, David B. (Springville, UT); Hall, Jr., H. Tracy (Provo, UT); Rawle, Michael (Springville, UT)

    2011-05-24

    A transmission system in a downhole component comprises a plurality of data transmission elements. A coaxial cable having an inner conductor and an outer conductor is disposed within a passage in the downhole component such that at least one capacitor is disposed in the passage and having a first terminal coupled to the inner conductor and a second terminal coupled to the outer conductor. Preferably the transmission element comprises an electrically conducting coil. Preferably, within the passage a connector is adapted to electrically connect the inner conductor of the coaxial cable and the lead wire. The coaxial capacitor may be disposed between and in electrically communication with the connector and the passage. In another embodiment a connector is adapted to electrical connect a first and a second portion of the inner conductor of the coaxial cable and a coaxial capacitor is in electrical communication with the connector and the passage.

  7. Data transmission element for downhole drilling components

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Dahlgren, Scott (Provo, UT); Fox, Joe (Spanish Fork, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT)

    2006-01-31

    A robust data transmission element for transmitting information between downhole components, such as sections of drill pipe, in the presence of hostile environmental conditions, such as heat, dirt, rocks, mud, fluids, lubricants, and the like. The data transmission element components include a generally U-shaped annular housing, a generally U-shaped magnetically conductive, electrically insulating element such as ferrite, and an insulated conductor. Features on the magnetically conducting, electrically insulating element and the annular housing create a pocket when assembled. The data transmission element is filled with a polymer to retain the components within the annular housing by filling the pocket with the polymer. The polymer can bond with the annular housing and the insulated conductor but preferably not the magnetically conductive, electrically insulating element. A data transmission element is mounted within a recess proximate a mating surface of a downhole drilling component, such as a section of drill pipe.

  8. Method and apparatus of assessing down-hole drilling conditions

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Pixton, David S. (Lehl, UT); Johnson, Monte L. (Orem, UT); Bartholomew, David B. (Springville, UT); Fox, Joe (Spanish Fork, UT)

    2007-04-24

    A method and apparatus for use in assessing down-hole drilling conditions are disclosed. The apparatus includes a drill string, a plurality of sensors, a computing device, and a down-hole network. The sensors are distributed along the length of the drill string and are capable of sensing localized down-hole conditions while drilling. The computing device is coupled to at least one sensor of the plurality of sensors. The data is transmitted from the sensors to the computing device over the down-hole network. The computing device analyzes data output by the sensors and representative of the sensed localized conditions to assess the down-hole drilling conditions. The method includes sensing localized drilling conditions at a plurality of points distributed along the length of a drill string during drilling operations; transmitting data representative of the sensed localized conditions to a predetermined location; and analyzing the transmitted data to assess the down-hole drilling conditions.

  9. Downhole pipe selection for acoustic telemetry

    DOE Patents [OSTI]

    Drumheller, D.S.

    1995-12-19

    A system is described for transmitting signals along a downhole string including a plurality of serially connected tubular pipes such as drill or production pipes, a transmitter for transmitting a signal along the string and a receiver for receiving the signal placed along the string at a location spaced from said transmitting means, wherein the pipes between the transmitter and the receiver are ordered according to length of tube to minimize loss of signal from said transmitter to said receiver. 7 figs.

  10. Downhole delay assembly for blasting with series delay

    DOE Patents [OSTI]

    Ricketts, Thomas E. (Grand Junction, CO)

    1982-01-01

    A downhole delay assembly is provided which can be placed into a blasthole for initiation of explosive in the blasthole. The downhole delay assembly includes at least two detonating time delay devices in series in order to effect a time delay of longer than about 200 milliseconds in a round of explosions. The downhole delay assembly provides a protective housing to prevent detonation of explosive in the blasthole in response to the detonation of the first detonating time delay device. There is further provided a connection between the first and second time delay devices. The connection is responsive to the detonation of the first detonating time delay device and initiates the second detonating time delay device. A plurality of such downhole delay assemblies are placed downhole in unfragmented formation and are initiated simultaneously for providing a round of explosive expansions. The explosive expansions can be used to form an in situ oil shale retort containing a fragmented permeable mass of formation particles.

  11. Method for bonding a transmission line to a downhole tool

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2007-11-06

    An apparatus for bonding a transmission line to the central bore of a downhole tool includes a pre-formed interface for bonding a transmission line to the inside diameter of a downhole tool. The pre-formed interface includes a first surface that substantially conforms to the outside contour of a transmission line and a second surface that substantially conforms to the inside diameter of a downhole tool. In another aspect of the invention, a method for bonding a transmission line to the inside diameter of a downhole tool includes positioning a transmission line near the inside wall of a downhole tool and placing a mold near the transmission line and the inside wall. The method further includes injecting a bonding material into the mold and curing the bonding material such that the bonding material bonds the transmission line to the inside wall.

  12. Apparatus for responding to an anomalous change in downhole pressure

    DOE Patents [OSTI]

    Hall, David R.; Fox, Joe; Wilde, Tyson; Barlow, Jonathan S.

    2010-04-13

    A method of responding to an anomalous change in downhole pressure in a bore hole comprises detecting the anomalous change in downhole pressure, sending a signal along the segmented electromagnetic transmission path, receiving the signal, and performing a automated response. The anomalous change in downhole pressure is detected at a first location along a segmented electromagnetic transmission path, and the segmented electromagnetic transmission path is integrated into the tool string. The signal is received by at least one receiver in communication with the segmented electromagnetic transmission path. The automated response is performed along the tool string. Disclosed is an apparatus for responding to an anomalous change in downhole pressure in a downhole tool string, comprising a segmented electromagnetic transmission path connecting one or more receivers and at least one pressure sensor.

  13. Data Transmission System For A Downhole Component

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David (Lehi, UT); Dahlgren, Scott (Provo, UT); Sneddon, Cameron (Provo, UT); Fox, Joe (Spanish Fork, UT); Briscoe, Michael (Lehi, UT)

    2005-01-18

    The invention is a system for transmitting data through a string of downhole components. In accordance with one aspect of the invention, the system includes a plurality of downhole components, such as sections of pipe in a drill string. Each component has a first and second end, with a first communication element located at the first end and a second communication element located at the second end. Each communication element includes a first contact and a second contact. The system also includes a coaxial cable running between the first and second communication elements, the coaxial cable having a conductive tube and a conductive core within it. The system also includes a first and second connector for connecting the first and second communication elements respectively to the coaxial cable. Each connector includes a conductive sleeve, lying concentrically within the conductive tube, which fits around and makes electrical contact with the conductive core. The conductive sleeve is electrically isolated from the conductive tube. The conductive sleeve of the first connector is in electrical contact with the first contact of the first communication element, the conductive sleeve of the second connector is in electrical contact with the first contact of the second communication element, and the conductive tube is in electrical contact with both the second contact of the first communication element and the second contact of the second communication element.

  14. Signal connection for a downhole tool string

    DOE Patents [OSTI]

    Hall, David R.; Hall, Jr., H. Tracy; Pixton, David S.; Bradford, Kline; Fox, Joe; Briscoe, Michael

    2006-08-29

    A signal transmission connection for a tool string used in exploration and production of natural resources, namely: oil, gas, and geothermal energy resources. The connection comprises first and second annular elements deployed in cooperative association with each other. The respective elements comprise inductive transducers that are capable of two-way signal transmission between each other, with downhole components of the tool string, and with ground-level equipment. The respective inductive transducers comprise one or more conductive loops housed within ferrite troughs, or within ferrite trough segments. When energized, the conductive loops produce a magnetic field suitable for transmitting the signal. The second element may be rotational in drilling applications. The respective elements may be fitted with electronic equipment to aid and manipulate the transmission of the signal. The first element may also be in communication with the World Wide Web.

  15. Multipurpose Acoustic Sensor for Downhole Fluid Monitoring

    SciTech Connect (OSTI)

    Pantea, Cristian

    2012-05-04

    The projects objectives and purpose are to: (1) development a multipurpose acoustic sensor for downhole fluid monitoring in Enhanced Geothermal Systems (EGS) reservoirs over typical ranges of pressures and temperatures and demonstrate its capabilities and performance for different EGS systems; (2) determine in real-time and in a single sensor package several parameters - temperature, pressure, fluid flow and fluid properties; (3) needed in nearly every phase of an EGS project, including Testing of Injection and Production Wells, Reservoir Validation, Inter-well Connectivity, Reservoir Scale Up and Reservoir Sustainability. (4) Current sensors are limited to operating at lower temperatures, but the need is for logging at high temperatures. The present project deals with the development of a novel acoustic-based sensor that can work at temperatures up to 374 C, in inhospitable environments.

  16. Continuous chain bit with downhole cycling capability

    DOE Patents [OSTI]

    Ritter, Don F. (Albuquerque, NM); St. Clair, Jack A. (Albuquerque, NM); Togami, Henry K. (Albuquerque, NM)

    1983-01-01

    A continuous chain bit for hard rock drilling is capable of downhole cycling. A drill head assembly moves axially relative to a support body while the chain on the head assembly is held in position so that the bodily movement of the chain cycles the chain to present new composite links for drilling. A pair of spring fingers on opposite sides of the chain hold the chain against movement. The chain is held in tension by a spring-biased tensioning bar. A head at the working end of the chain supports the working links. The chain is centered by a reversing pawl and piston actuated by the pressure of the drilling mud. Detent pins lock the head assembly with respect to the support body and are also operated by the drilling mud pressure. A restricted nozzle with a divergent outlet sprays drilling mud into the cavity to remove debris. Indication of the centered position of the chain is provided by noting a low pressure reading indicating proper alignment of drilling mud slots on the links with the corresponding feed branches.

  17. Downhole Vibration Monitoring and Control System

    SciTech Connect (OSTI)

    Martin E. Cobern

    2007-09-30

    The objective of this program is to develop a system to both monitor the vibration of a bottomhole assembly, and to adjust the properties of an active damper in response to these measured vibrations. The key feature of this system is its use of a magnetorheological fluid (MRF) to allow the damping coefficient to be changed extensively, rapidly and reversibly without the use of mechanical valves, but only by the application of a current. Phase I of this program, which entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype, was completed on May 31, 2004. Much of the effort was devoted to the design and testing of the MRF damper, itself. The principal objectives of Phase II were: more extensive laboratory testing, including the evaluation of different feedback algorithms for control of the damper; design and manufacture of a field prototype system; and, testing of the field prototype in a drilling laboratory. Phase II concluded on January 31, 2006, and a final report was issued. Work on Phase III of the project began during the first quarter, 2006, with the objectives of building precommercial prototypes, testing them in a drilling laboratory and the field; developing and implementing a commercialization plan. All of these have been accomplished. The Downhole Vibration Monitoring & Control System (DVMCS) prototypes have been successfully proven in testing at the TerraTek drilling facility and at the Rocky Mountain Oilfield Test Center (RMOTC.) Based on the results of these tests, we have signed a definitive development and distribution agreement with Smith, and commercial deployment is underway. This current version of the DVMCS monitors and controls axial vibrations. Due to time and budget constraints of this program, it was not possible to complete a system that would also deal with lateral and torsional (stick-slip) vibrations as originally planned; however, this effort is continuing without DOE funding.

  18. Jiaozuo Coal Group Hejing Technique Co Ltd | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EAInvervar Hydro Jump to:Huilun SolarLongjiangJiaozuo Coal Group Hejing

  19. Downhole steam generator with improved preheating, combustion, and protection features

    DOE Patents [OSTI]

    Fox, R.L.

    1981-01-07

    For tertiary oil recovery, a downhole steam generator is designed which provides for efficient counterflow cooling of the combustion chamber walls and preheating of the fuel and water. Pressure-responsive doors are provided for closing and opening the outlet in response to flameout, thereby preventing flooding of the combustion chamber. (DLC)

  20. Drilling jar for use in a downhole network

    DOE Patents [OSTI]

    Hall, David R.; Fox, Joe; McPherson, James; Pixton, David S.; Briscoe, Michael

    2006-01-31

    Apparatus and methods for integrating transmission cable into the body of selected downhole tools, such as drilling jars, having variable or changing lengths. A wired downhole-drilling tool is disclosed in one embodiment of the invention as including a housing and a mandrel insertable into the housing. A coiled cable is enclosed within the housing and has a first end connected to the housing and a second end connected to the mandrel. The coiled cable is configured to stretch and shorten in accordance with axial movement between the housing and the mandrel. A clamp is used to fix the coiled cable with respect to the housing, the mandrel, or both, to accommodate a change of tension in the coiled cable.

  1. Active cooling for downhole instrumentation: Preliminary analysis and system selection

    SciTech Connect (OSTI)

    Bennett, G.A.

    1988-03-01

    A feasibility study and a series of preliminary designs and analyses were done to identify candidate processes or cycles for use in active cooling systems for downhole electronic instruments. A matrix of energy types and their possible combinations was developed and the energy conversion process for each pari was identified. The feasibility study revealed conventional as well as unconventional processes and possible refrigerants and identified parameters needing further clarifications. A conceptual design or series od oesigns for each system was formulated and a preliminary analysis of each design was completed. The resulting coefficient of performance for each system was compared with the Carnot COP and all systems were ranked by decreasing COP. The system showing the best combination of COP, exchangeability to other operating conditions, failure mode, and system serviceability is chosen for use as a downhole refrigerator. 85 refs., 48 figs., 33 tabs.

  2. High power laser downhole cutting tools and systems

    DOE Patents [OSTI]

    Zediker, Mark S; Rinzler, Charles C; Faircloth, Brian O; Koblick, Yeshaya; Moxley, Joel F

    2015-01-20

    Downhole cutting systems, devices and methods for utilizing 10 kW or more laser energy transmitted deep into the earth with the suppression of associated nonlinear phenomena. Systems and devices for the laser cutting operations within a borehole in the earth. These systems and devices can deliver high power laser energy down a deep borehole, while maintaining the high power to perform cutting operations in such boreholes deep within the earth.

  3. Use of Downhole Motors in Geothermal Drilling in the Philippines

    SciTech Connect (OSTI)

    Pyle, D. E.

    1981-01-01

    This paper describes the use of downhole motors in the Tiwi geothermal field in the Philippines, The discussion includes the application Of a Dyna-Drill with insert-type bits for drilling through surface alluvium. The economics of this type of drilling are compared to those of conventional rotary drilling. The paper also describes the use of a turbodrill that drills out scale as the well produces geothermal fluids.

  4. High-Temperature Downhole Tools | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View NewTexas: Energy Resources Jump to:Hershey,High-Temperature Downhole Tools Jump to:

  5. Static downhole characteristics of well CGEH-1 at Coso Hot Springs...

    Open Energy Info (EERE)

    are in the upper-cased portion of the well. Downhole chemical sampling suggests that the borehole still contains remnants of drilling materials. The well has never been...

  6. Category:Downhole Fluid Sampling | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,Cammack Village,8199089°,AnalyticalCuttings AnalysisDownhole Fluid

  7. Element for use in an inductive coupler for downhole components

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Spanish Fork, UT)

    2009-03-31

    An element for use in an inductive coupler for downhole components comprises an annular housing having a generally circular recess. The element further comprises a plurality of generally linear, magnetically conductive segments. Each segment includes a bottom portion, an inner wall portion, and an outer wall portion. The portions together define a generally linear trough from a first end to a second end of each segment. The segments are arranged adjacent to each other within the housing recess to form a generally circular trough. The ends of at least half of the segments are shaped such that the first end of one of the segments is complementary in form to the second end of an adjacent segment. In one embodiment, all of the ends are angled. Preferably, the first ends are angled with the same angle and the second ends are angled with the complementary angle.

  8. Subsea intensifier supplies high pressure to downhole safety valves

    SciTech Connect (OSTI)

    1996-07-01

    A subsea high-pressure hydraulic intensifier (HPI) is now available as an alternative method of operating downhole surface-controlled subsea safety valves (SCSSVs). By generating high hydraulic pressures on the seafloor, the system eliminates need for transmitting high pressure via hose from surface. The new intensifier can generate up to 15,000 psi (1,035 bar) from the 3,000-psi (210-bar) low pressure actuator supply already within the umbilical. It uses low pressure hydraulic fluid acting on a large-area piston to push a second piston, one-fifth the cross sectional area, acting in a second hydraulic circuit. To reduce pulsation, the unit is double acting, with one piston drawing in fluid while the other discharges it. This paper reviews the design, performance, and construction of this equipment.

  9. Method and apparatus for transmitting and receiving data to and from a downhole tool

    DOE Patents [OSTI]

    Hall, David R.; Fox, Joe

    2007-03-13

    A transmission line network system for transmitting and/or receiving data from a downhole tool. The invention is achieved by providing one or more transceiving elements, preferably rings, at either end of a downhole tool. A conduit containing a coaxial cable capable of communicating an electrical signal is attached to the transceiving element and extends through a central bore of the downhole tool and through the central bore of any tool intermediate the first transceiving element and a second transceiving element. Upon receiving an electrical signal from the cable, the second transceiving element may convert such signal to a magnetic field. The magnetic field may be detected by a third transceiving element in close proximity to the second transceiving element. In this manner, many different tools may be included in a downhole transmission network without requiring substantial modification, if any, of any particular tool.

  10. Report covering examination of parts from downhole steam generators. [Combustor head and sleeve parts

    SciTech Connect (OSTI)

    Pettit, F. S.; Meier, G. H.

    1983-08-01

    Combustor head and sleeve parts were examined by using optical and scanning electron metallography after use in oxygen/diesel and air/diesel downhole steam generators. The degradation of the different alloy components is described in terms of reactions with oxygen, sulfur and carbon in the presence of cyclic stresses, all generated by the combustion process. Recommendations are presented for component materials (alloys and coatings) to extend component lives in the downhole steam generators. 9 references, 22 figures, 3 tables.

  11. Apparatus for downhole drilling communications and method for making and using the same

    DOE Patents [OSTI]

    Normann, R.A.; Lockwood, G.J.; Gonzales, M.

    1998-03-03

    An apparatus for downhole drilling communications is presented. The apparatus includes a spool and end pieces for maintaining the spool at the bottom of a drill string near a drill bit during drilling operations. The apparatus provides a cable for communicating signals between a downhole electronics package and a surface receiver in order to perform measurements while drilling. A method of forming the apparatus is also set forth wherein the apparatus is formed about a central spindle and lathe. 6 figs.

  12. Apparatus for downhole drilling communications and method for making and using the same

    DOE Patents [OSTI]

    Normann, Randy A. (Edgewood, NM); Lockwood, Grant J. (Albuquerque, NM); Gonzales, Meliton (Albuquerque, NM)

    1998-01-01

    An apparatus for downhole drilling communications is presented. The apparatus includes a spool and end pieces for maintaining the spool at the bottom of a drill string near a drill bit during drilling operations. The apparatus provides a cable for communicating signals between a downhole electronics package and a surface receiver in order to perform measurements while drilling. A method of forming the apparatus is also set forth wherein the apparatus is formed about a central spindle and lathe.

  13. Advances in downhole sampling of high temperature solutions

    SciTech Connect (OSTI)

    Bayhurst, G.K.; Janecky, D.R.

    1991-01-01

    A fluid sampler capable of sampling hot and/or deep wells has been developed at Los Alamos National Laboratory. In collaboration with Leutert Instruments, an off-the-shelf sampler design was modified to meet gas-tight and minimal chemical reactivity/contamination specifications for use in geothermal wells and deep ocean drillholes. This downhole sampler has been routinely used at temperatures up to 300{degrees}C and hole depths of greater than 5 km. We have tested this sampler in various continental wells, including Valles Caldera VC-2a and VC-2b, German KTB, Cajon Pass, and Yellowstone Y-10. Both the standard commercial and enhanced samplers have also been used to obtain samples from a range of depths in the Ocean Drilling Project's hole 504B and during recent mid-ocean ridge drilling efforts. The sampler has made it possible to collect samples at temperatures and conditions beyond the limits of other tools with the added advantage of chemical corrosion resistance.

  14. Drilling Optimization Utilizing Surface Instrumentaton for Downhole Event Recognition

    SciTech Connect (OSTI)

    John H. Cohen; Greg Deskins

    2006-02-01

    This DOE project was undertaken to develop and test an instrumented data-acquisition sub that is mounted in a drill string below the top drive and used to detect downhole events. Data recorded at the surface during drilling operations would then be processed and presented to the driller to discern undesirable drilling conditions and help optimize drilling rates and maximize the life of components in the BHA. This instrumented sub was originally conceived and developed solely as a single-point collection center for rig data that would be used in a number of Noble's products. The sub was designed to collect hook load, rotary torque, rotary speed, rotary position, drill pipe pressure, mud temperature, triaxial vibration, and triaxial magnetometer data. The original design and fabrication was by Sandia National Labs under Noble's direction, which was then tested with Sandia's diagnostics-while-drilling downhole package. After initial results were analyzed, the team surmised that important information describing performance and condition of the bottom-hole assembly (BHA) was embedded in the data recorded by the instrumented sub, and began investigating the potential of using surface measurements from the sub to highlight problems occurring downhole before they could be discerned by the driller. Later, a proposal was submitted to DOE for funding to more broadly investigate use of the system for detecting downhole problems while drilling. Soon after DOE awarded this contract, the Noble team responsible for the previous developments was disbanded and their work terminated (due to factors unrelated to the sub development). This change halted the complementary work that Noble had planned to conduct during the DOE project, and necessitated that all the development work be completed by the DOE project. More effort was expended on the project to develop a field-ready prototype than was originally foreseen. The sub's design had to be significantly modified during the project based on results of field tests. The original slip ring for communication was replaced with a radio link, which makes the sub easier to move to different rigs and simplifies the set-up process. In addition, the sub's previous design would prevent it being used on oil and gas rigs due to potential explosion hazard. The sub was redesigned so that during operation all electrical components on the sub are under a blanket of nitrogen. A pressure switch is used so that, should a leak develop, the sub will shut itself down until any problems are repaired. A total of four series of field tests were conducted. The first (mentioned above) was part of the original Noble-sponsored program and in conjunction with Sandia's diagnostics-while-drilling system. Although these tests highlighted important problems, they showed significant promise for the concept, and the sub was returned to Sandia for early repairs and modifications. After the DOE project took possession of the sub, it was tested three more times in the field. The first two DOE tests had the same objective, which was to establish that the sub could function correctly on the rig and deliver usable data, and to develop procedures for setting up and operating the sub and support computer on a rig. During the first test most of the time was spent troubleshooting the sub. Several significant problems were revealed, demonstrating that the current design was not robust enough to survive typical oil field operations. The sub was then redesigned to increase its robustness and allow it to run safely in areas where explosive gases might be present. Once these changes were implemented, the sub was sent to a second shake-down field test. The new design was found to be greatly improved. The sub operated throughout the test, and quality of the data was significantly higher. Near the end of this project, a final field test was conducted with the objective of creating (or simulating) specific problem conditions and recording data to determine if signatures could be recorded and identified that, after analysis, might signify particula

  15. Inductive coupler for downhole components and method for making same

    DOE Patents [OSTI]

    Hall, David R.; Hall, Jr., H. Tracy; Pixton, David S.; Dahlgren, Scott; Briscoe, Michael A.; Sneddon, Cameron; Fox, Joe

    2006-05-09

    The present invention includes a method of making an inductive coupler for downhole components. The method includes providing an annular housing, preferably made of steel, the housing having a recess. A conductor, preferably an insulated wire, is also provided along with a plurality of generally U-shaped magnetically conducting, electrically insulating (MCEI) segments. Preferably, the MCEI segments comprise ferrite. An assembly is formed by placing the plurality of MCEI segments within the recess in the annular housing. The segments are aligned to form a generally circular trough. A first portion of the conductor is placed within the circular trough. This assembly is consolidated with a meltable polymer which fills spaces between the segments, annular housing and the first portion of the conductor. The invention also includes an inductive coupler including an annular housing having a recess defined by a bottom portion and two opposing side wall portions. At least one side wall portion includes a lip extending toward but not reaching the other side wall portion. A plurality of generally U-shaped MCEI segments, preferably comprised of ferrite, are disposed in the recess and aligned so as to form a circular trough. The coupler further includes a conductor disposed within the circular trough and a polymer filling spaces between the segments, the annular housing and the conductor.

  16. Downhole steam generator with improved preheating/cooling features

    DOE Patents [OSTI]

    Donaldson, A. Burl (Albuquerque, NM); Hoke, Donald E. (Albuquerque, NM); Mulac, Anthony J. (Tijeras, NM)

    1983-01-01

    An apparatus for downhole steam generation employing dual-stage preheaters for liquid fuel and for the water. A first heat exchange jacket for the fuel surrounds the fuel/oxidant mixing section of the combustor assembly downstream of the fuel nozzle and contacts the top of the combustor unit of the combustor assembly, thereby receiving heat directly from the combustion of the fuel/oxidant. A second stage heat exchange jacket surrounds an upper portion of the oxidant supply line adjacent the fuel nozzle receiving further heat from the compression heat which results from pressurization of the oxidant. The combustor unit includes an inner combustor sleeve whose inner wall defines the combustion zone. The inner combustor sleeve is surrounded by two concentric water channels, one defined by the space between the inner combustor sleeve and an intermediate sleeve, and the second defined by the space between the intermediate sleeve and an outer cylindrical housing. The channels are connected by an annular passage adjacent the top of the combustor assembly and the countercurrent nature of the water flow provides efficient cooling of the inner combustor sleeve. An annular water ejector with a plurality of nozzles is provided to direct water downwardly into the combustor unit at the boundary of the combustion zone and along the lower section of the intermediate sleeve.

  17. Apparatus and method for compensating for clock drift in downhole drilling components

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Pixton, David S. (Lehi, UT); Johnson, Monte L. (Orem, UT); Bartholomew, David B. (Springville, UT); Hall, Jr., H. Tracy (Provo, UT)

    2007-08-07

    A precise downhole clock that compensates for drift includes a prescaler configured to receive electrical pulses from an oscillator. The prescaler is configured to output a series of clock pulses. The prescaler outputs each clock pulse after counting a preloaded number of electrical pulses from the oscillator. The prescaler is operably connected to a compensator module for adjusting the number loaded into the prescaler. By adjusting the number that is loaded into the prescaler, the timing may be advanced or retarded to more accurately synchronize the clock pulses with a reference time source. The compensator module is controlled by a counter-based trigger module configured to trigger the compensator module to load a value into the prescaler. Finally, a time-base logic module is configured to calculate the drift of the downhole clock by comparing the time of the downhole clock with a reference time source.

  18. Development of a High Pressure/High Temperature Down-hole Turbine Generator

    SciTech Connect (OSTI)

    Ben Plamp

    2008-06-30

    As oil & natural gas deposits become more difficult to obtain by conventional means, wells must extend to deeper more heat-intensive environments. The technology of the drilling equipment required to reach these depths has exceeded the availability of electrical power sources needed to operate these tools. Historically, logging while drilling (LWD) and measure while drilling (MWD) devices utilized a wireline to supply power and communication from the operator to the tool. Lithium ion batteries were used in scenarios where a wireline was not an option, as it complicated operations. In current downhole applications, lithium ion battery (LIB) packs are the primary source for electrical power. LIB technology has been proven to supply reliable downhole power at temperatures up to 175 °C. Many of the deeper well s reach ambient temperatures above 200 °C, creating an environment too harsh for current LIB technology. Other downfalls of LIB technology are cost, limitations on charge cycles, disposal issues and possible safety hazards including explosions and fires. Downhole power generation can also be achieved by utilizing drilling fluid flow and converting it to rotational motion. This rotational motion can be harnessed to spin magnets around a series of windings to produce power proportional to the rpm experienced by the driven assembly. These generators are, in most instances, driven by turbine blades or moyno-based drilling fluid pumps. To date, no commercially available downhole power generators are capable of operating at ambient temperatures of 250 °C. A downhole power g enerator capable of operation in a 250 °C and 20,000 psi ambient environment will be an absolute necessity in the future. Dexter Magnetic Technologies’ High-Pressure High-Temperature (HPHT) Downhole Turbine Generator is capable of operating at 250 °C and 20, 000 psi, but has not been tested in an actual drilling application. The technology exists, but to date no company has been willing to test the tool.

  19. Downhole geothermal well sensors comprising a hydrogen-resistant optical fiber

    DOE Patents [OSTI]

    Weiss, Jonathan D.

    2005-02-08

    A new class of optical fiber based thermal sensors has been invented. The new sensors comprise hydrogen-resistant optical fibers which are able to withstand a hot, hydrogen-containing environment as is often found in the downhole well environment.

  20. Microseismic mapping of a Cotton Valley hydraulic fracture using decimated downhole arrays J.T. Rutledge

    E-Print Network [OSTI]

    Microseismic mapping of a Cotton Valley hydraulic fracture using decimated downhole arrays J three hydraulic fracture operations in the Cotton Valley gas field of East Texas. Two 48-level, 3 a consortia of operators and service companies conducted an extensive hydraulic fracture imaging demonstration

  1. Full-waveform based complete moment tensor inversion and source parameter estimation from downhole microseismic data for hydrofracture monitoring

    E-Print Network [OSTI]

    Song, Fuxian

    Downhole microseismic monitoring is a valuable tool in understanding the efficacy of hydraulic fracturing. Inverting for the moment tensor has gained increasing popularity in recent years as a way to understand the fracturing ...

  2. Full-waveform Based Complete Moment Tensor Inversion and Stress Estimation from Downhole Microseismic Data for Hydrofracture Monitoring

    E-Print Network [OSTI]

    Song, Fuxian

    2011-01-01

    Downhole microseismics has gained increasing popularity in recent years as a way to characterize hydraulic fracturing and to estimate in-situ stress state. Conventional approaches only utilize part of the information ...

  3. Downhole microseismic monitoring of hydraulic fracturing: a full-waveform approach for complete moment tensor inversion and stress estimation

    E-Print Network [OSTI]

    Song, Fuxian

    2010-01-01

    Downhole microseismics has gained in popularity in recent years as a way to characterize hydraulic fracturing sources and to estimate in-situ stress state. Conventional approaches only utilize part of the information ...

  4. Biased insert for installing data transmission components in downhole drilling pipe

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Briscoe, Michael A. (Lehi, UT); Garner, Kory K. (Payson, UT); Wilde, Tyson J. (Spanish Fork, UT)

    2007-04-10

    An apparatus for installing data transmission hardware in downhole tools includes an insert insertable into the box end or pin end of drill tool, such as a section of drill pipe. The insert typically includes a mount portion and a slide portion. A data transmission element is mounted in the slide portion of the insert. A biasing element is installed between the mount portion and the slide portion and is configured to create a bias between the slide portion and the mount portion. This biasing element is configured to compensate for varying tolerances encountered in different types of downhole tools. In selected embodiments, the biasing element is an elastomeric material, a spring, compressed gas, or a combination thereof.

  5. An Internal Coaxial Cable Electrical Connector For Use In Downhole Tools

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Dahlgren, Scott (Provo, UT); Fox, Joe (Spanish Fork, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT)

    2005-11-29

    A coaxial cable electrical connector more specifically an internal coaxial cable connector placed within a coaxial cable and its constituent components. A coaxial cable connector is in electrical communcation with an inductive transformer and a coaxial cable. The connector is in electrical communication with the outer housing of the inductive transfonner. A generally coaxial center conductor, a portion of which could be the coil in the inductive transformer, passes through the connector, is electrically insulated from the connector, and is in electrical communication with the conductive care of the coaxial cable. A plurality of bulbous pliant tabs on the coaxial cable connector mechanically engage the inside diameter of the coaxial cable thus grounding the transformer to the coaxial cable. The coaxial cable and inductive transformer are disposed within downhole tools to transmit electrical signals between downhole tools within a drill string.

  6. High-Temperature Motor Windings for Downhole Pumps Used in Geothermal Energy Production

    SciTech Connect (OSTI)

    Hooker, Matthew; Hazelton, Craig; Kano, Kimi

    2010-12-31

    The development of highly reliable downhole equipment is an essential element in enabling the widespread utilization of Enhanced Geothermal Systems (EGS). The downhole equipment used in these systems will be required to operate at high voltages and temperatures on the order of 200 to 250°C (and eventually to 300?C). These conditions exceed the practical operating ranges of currently available thermoplastic wire insulations, and thus limit the operating lifetime of tools such as Electric Submersible Pumps (ESPs). In this work, high-temperature insulations based on composite materials were developed and demonstrated. The products of this work were found to exhibit electrical resistivities and dielectric breakdown strengths that PEEK at temperatures above 250C. In addition, sub-scale motor windings were fabricated and tested to validate the performance of this technology

  7. Downhole steam generator using low-pressure fuel and air supply

    DOE Patents [OSTI]

    Fox, R.L.

    1981-01-07

    For tertiary oil recovery, an apparatus for downhole steam generation is designed in which water is not injected directly onto the flame in the combustor, the combustion process is isolated from the reservoir pressure, the fuel and oxidant are supplied to the combustor at relatively low pressures, and the hot exhaust gases is prevented from entering the earth formation but is used to preheat the fuel and oxidant and water. The combustion process is isolated from the steam generation process. (DLC)

  8. An Internal Coaxial Cable Electrical Connector For Use In Downhole Tools

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Dahlgren, Scott (Provo, UT); Fox, Joe (Spanish Fork, UT); Sneddon, Cameron (Provo, UT); Briscoe, Michael (Lehi, UT)

    2005-09-20

    A seal for a coaxial cable electrical connector more specifically an internal seal for a coaxial cable connector placed within a coaxial cable and its constituent components. A coaxial cable connector is in electrical communcation with an inductive transformer and a coaxial cable. The connector is in electrical communication with the outer housing of the inductive transformer. A generally coaxial center conductor, a portion of which could be the coil in the inductive transformer, passes through the connector, is electrically insulated from the connector, and is in electrical communication with the conductive core of the coaxial cable. The electrically insulating material also doubles as a seal to safegaurd against penetration of fluid, thus protecting against shorting out of the electrical connection. The seal is a multi-component seal, which is pre-compressed to a desired pressure rating. The coaxial cable and inductive transformer are disposed within downhole tools to transmit electrical signals between downhole tools within a drill string. The internal coaxial cable connector and its attendant seal can be used in a plurality of downhole tools, such as sections of pipe in a drill string, drill collars, heavy weight drill pipe, and jars.

  9. Downhole control -- The key to coiled tubing drilling efficiency

    SciTech Connect (OSTI)

    1996-10-01

    Coiled tubing drilling has experienced dramatic growth in recent years. Originally a step-child, the technique now claims built-for-purpose equipment and promises cost-effective drilling with little damage to formations. The paper describes a bottom hole assembly and an orienting tool designed to be used to control coiled tubing drilling.

  10. ENHANCED OIL RECOVERY WITH DOWNHOLE VIBRATION STIMULATION IN OSAGE COUNTY OKLAHOMA

    SciTech Connect (OSTI)

    Robert Westermark; J. Ford Brett

    2003-11-01

    This Final Report covers the entire project from July 13, 2000 to June 30, 2003. The report summarizes the details of the work done on the project entitled ''Enhanced Oil Recovery with Downhole Vibration Stimulation in Osage County Oklahoma'' under DOE Contract Number DE-FG26-00BC15191. The project was divided into nine separate tasks. This report is written in an effort to document the lessons learned during the completion of each task. Therefore each task will be discussed as the work evolved for that task throughout the duration of the project. Most of the tasks are being worked on simultaneously, but certain tasks were dependent on earlier tasks being completed. During the three years of project activities, twelve quarterly technical reports were submitted for the project. Many individual topic and task specific reports were included as appendices in the quarterly reports. Ten of these reports have been included as appendices to this final report. Two technical papers, which were written and accepted by the Society of Petroleum Engineers, have also been included as appendices. The three primary goals of the project were to build a downhole vibration tool (DHVT) to be installed in seven inch casing, conduct a field test of vibration stimulation in a mature waterflooded field and evaluate the effects of the vibration on both the produced fluid characteristics and injection well performance. The field test results are as follows: In Phase I of the field test the DHVT performed exceeding well, generating strong clean signals on command and as designed. During this phase Lawrence Berkeley National Laboratory had installed downhole geophones and hydrophones to monitor the signal generated by the downhole vibrator. The signals recorded were strong and clear. Phase II was planned to be ninety-day reservoir stimulation field test. This portion of the field tests was abruptly ended after one week of operations, when the DHVT became stuck in the well during a routine removal activity. The tool cannot operate in this condition and remains in the well. There was no response measured during or afterwards to either the produced fluids from the five production wells or in the injection characteristics of the two injection wells in the pilot test area. Monitoring the pilot area injection and production wells ceased when the field test was terminated March 14, 2003. Thus, a key goal of this project, which was to determine the effects of vibration stimulation on improving oil recovery from a mature waterflood, was not obtained. While there was no improved oil recovery effect measured, there was insufficient vibration stimulation time to expect a change to occur. No conclusion can be drawn about the effectiveness of vibration stimulation in this test.

  11. Enhanced Oil Recovery with Downhole Vibrations Stimulation in Osage County, Oklahoma

    SciTech Connect (OSTI)

    J. Ford Brett; Robert V. Westermark

    2001-09-30

    This Technical Quarterly Report is for the reporting period July 1, 2001 to September 30, 2001. The report provides details of the work done on the project entitled ''Enhanced Oil Recovery with Downhole Vibration Stimulation in Osage County Oklahoma''. The project is divided into nine separate tasks. Several of the tasks are being worked on simultaneously, while other tasks are dependent on earlier tasks being completed. The vibration stimulation well is permitted as Well 111-W-27, section 8 T26N R6E Osage County Oklahoma. It was spud July 28, 2001 with Goober Drilling Rig No. 3. The well was drilled to 3090-feet cored, logged, cased and cemented. The Rig No.3 moved off August 6, 2001. Phillips Petroleum Co. has begun analyzing the cores recovered from the test well. Standard porosity, permeability and saturation measurements will be conducted. They will then begin the sonic stimulation core tests Calumet Oil Company, the operator of the NBU, has begun to collect both production and injection wells information to establish a baseline for the project in the pilot field test area. Green Country Submersible Pump Company, a subsidiary of Calumet Oil Company, will provide both the surface equipment and downhole tools to allow the Downhole Vibration Tool to be operated by a surface rod rotating system. The 7-inch Downhole Vibration Tool (DHVT) has been built and is ready for initial shallow testing. The shallow testing will be done in a temporarily abandoned well operated by Calumet Oil Co. in the Wynona waterflood unit. The data acquisition doghouse and rod rotating equipment have been placed on location in anticipation of the shallow test in Well No.20-12 Wynona Waterflood Unit. A notice of invention disclosure was submitted to the DOE Chicago Operations Office. DOE Case No.S-98,124 has been assigned to follow the documentation following the invention disclosure. A paper covering the material presented to the Oklahoma Geologic Survey (OGS)/DOE Annual Workshop in Oklahoma City May 8,9 2001 has been submitted for publication to the OGS. A technical paper draft has been submitted for the ASME/ETCE conference (Feb 2002) Production Technology Symposium. A one-day SPE sponsored short course which is planned to cover seismic stimulation efforts around the world, will be offered at the SPE/DOE Thirteenth Symposium on Improved Oil Recovery in Tulsa, OK, April 13-17, 2002. Dan Maloney, Phillips and Bob Westermark, OGCI will be the instructors. In addition, a proposed technical paper has been submitted for this meeting.

  12. Behavior of a hollow core photonic crystal fiber under high radial pressure for downhole application

    SciTech Connect (OSTI)

    Sadeghi, J., E-mail: j-sadeghi@sbu.ac.ir; Chenari, Z.; Ziaee, F. [Laser and Plasma Research Institute, Shahid Beheshti University, 1983963113 Tehran (Iran, Islamic Republic of); Latifi, H., E-mail: latifi@sbu.ac.ir [Laser and Plasma Research Institute, Shahid Beheshti University, 1983963113 Tehran (Iran, Islamic Republic of); Department of Physics, Shahid Beheshti University, Evin, 1983963113 Tehran (Iran, Islamic Republic of); Santos, J. L., E-mail: josantos@fc.up.pt [INESC Porto—Instituto de Engenharia de Sistemas e Computadores do Porto, Rua do Campo Alegre, 687, 4169-007 Porto (Portugal); Departamento de Física, da Faculdade de Ciências, da Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto (Portugal)

    2014-02-17

    Pressure fiber sensors play an important role in downhole high pressure measurements to withstand long term operation. The purpose of this paper is to present an application of hollow core photonic crystal fiber (HC-PCF) as a high pressure sensor head for downhole application based on dispersion variation. We used a high pressure stainless steel unit to exert pressure on the sensor. The experimental results show that different wavelengths based on sagnac loop interferometer have additive sensitivities from 5?×?10{sup ?5}?nm/psi at 1480?nm to 1.3?×?10{sup ?3}?nm/psi at 1680?nm. We developed a simulation to understand the reason for difference in sensitivity of wavelengths and also the relationship between deformation of HC-PCF and dispersion variation under pressure. For this purpose, by using the finite element method, we investigated the effect of structural variation of HC-PCF on spectral transformation of two linear polarizations under 1000?psi pressure. The simulation and experimental results show exponential decay behavior of dispersion variation from ?3.4?×?10{sup ?6} 1/psi to ?1.3?×?10{sup ?6} 1/psi and from ?5?×?10{sup ?6} 1/psi to ?1.8?×?10{sup ?6} 1/psi, respectively, which were in a good accordance with each other.

  13. Element for use in an inductive coupler for downhole drilling components

    DOE Patents [OSTI]

    Hall, David R.; Hall, Jr., H. Tracy; Pixton, David S.; Dahlgren, Scott; Fox, Joe; Sneddon, Cameron

    2006-08-29

    The present invention includes an element for use in an inductive coupler in a downhole component. The element includes a plurality of ductile, generally U-shaped leaves that are electrically conductive. The leaves are less than about 0.0625" thick and are separated by an electrically insulating material. These leaves are aligned so as to form a generally circular trough. The invention also includes an inductive coupler for use in downhole components, the inductive coupler including an annular housing having a recess with a magnetically conductive, electrically insulating (MCEI) element disposed in the recess. The MCEI element includes a plurality of segments where each segment further includes a plurality of ductile, generally U-shaped electrically conductive leaves. Each leaf is less than about 0.0625" thick and separated from the otherwise adjacent leaves by electrically insulating material. The segments and leaves are aligned so as to form a generally circular trough. The inductive coupler further includes an insulated conductor disposed within the generally circular trough. A polymer fills spaces between otherwise adjacent segments, the annular housing, insulated conductor, and further fills the circular trough.

  14. Fabrication, assembly, bench and drilling tests of two prototype downhole pneumatic turbine motors: Final technical report

    SciTech Connect (OSTI)

    Bookwalter, R.; Duettra, P.D.; Johnson, P.; Lyons, W.C.; Miska, S.

    1987-04-01

    The first and second prototype downhole pneumatic turbine motors have been fabricated, assembled and tested. All bench tests showed that the motor will produce horsepower and bit speeds approximating the predicted values. Specifically, the downhole pneumatic turbine motor produced approximately 50 horsepower at 100 rpm, while being supplied with about 3600 SCFM of compressed air. The first prototype was used in a drilling test from a depth of 389 feet to a depth of 789 feet in the Kirtland formation. This first prototype motor drilled at a rate exceeding 180 ft/hr, utilizing only 3000 SCFM of compressed air. High temperature tests (at approximately 460/sup 0/F) were carried out on the thrust assembly and the gearboxes for the two prototypes. These components operated successfully at these temperatures. Although the bench and drilling tests were successful, the tests revealed design changes that should be made before drilling tests are carried out in geothermal boreholes at the Geysers area, near Santa Rosa, California.

  15. Enhanced Oil Recovery with Downhole Vibration Stimulation in Osage County, Oklahoma

    SciTech Connect (OSTI)

    J. Ford Brett; Robert V. Westermark

    2002-06-30

    This Technical Quarterly Report is for the reporting period March 31, 2002 to June 30, 2002. The report provides details of the work done on the project entitled ''Enhanced Oil Recovery with Downhole Vibration Stimulation in Osage County Oklahoma''. The project is divided into nine separate tasks. Several of the tasks are being worked on simultaneously, while other tasks are dependent on earlier tasks being completed. The vibration stimulation Well 111-W-27 is located in section 8 T26N R6E of the North Burbank Unit (NBU), Osage County Oklahoma. It was drilled to 3090-feet cored, logged, cased and cemented. The rig moved off August 6, 2001. Phillips Petroleum Co. has performed several core studies on the cores recovered from the test well. Standard porosity, permeability and saturation measurements have been conducted. In addition Phillips has prepared a Core Petrology Report, detailing the lithology, stratigraphy and sedimentology for Well 111-W27, NBU. Phillips has also conducted the sonic stimulation core tests, the final sonic stimulation report has not yet been released. Calumet Oil Company, the operator of the NBU, began collecting both production and injection wells information to establish a baseline for the project in the pilot field test area since May 2001. The original 7-inch Downhole Vibration Tool (DHVT) has been thoroughly tested and it has been concluded that it needs to be redesigned. An engineering firm from Fayetteville AR has been retained to assist in developing a new design for the DHVT. The project participants requested from the DOE, a no-cost extension for the project through December 31, 2002. The no-cost extension amendment to the contract was signed during this reporting period. A technical paper SPE 75254 ''Enhanced Oil Recovery with Downhole Vibration Stimulation, Osage County, Oklahoma'' was presented at the 2002 SPE/DOE Thirteenth Symposium on Improved Oil Recovery, in Tulsa OK, April 17, 2002. A one-day short course was conducted at the SPE/DOE Thirteenth Symposium on Improved Oil Recovery in Tulsa, OK, April 13-14, 2002. Dan Maloney, Phillips and Bob Westermark, OGCI, Brett Davidson and Tim Spanos, Prism Production Technologies, were the instructors. The sixteen attendees also participated in the half-day field trip to the test facility near Tulsa.

  16. Comparison of lower-frequency (<1000 Hz) downhole seismic sources for use at environmental sites

    SciTech Connect (OSTI)

    Elbring, G.J.

    1995-03-01

    In conjunction with crosswell seismic surveying being done at the Hanford Site in south-central Washington, four different downhole seismic sources have been tested between the same set of boreholes. The four sources evaluated were the Bolt airgun, the OYO-Conoco orbital vibrator, and two Sandia-developed vertical vibrators, one pneumatically-driven, and the other based on a magnetostrictive actuator. The sources generate seismic energy in the lower frequency range of less than 1000 Hz and have different frequency characteristics, radiation patterns, energy levels, and operational considerations. Collection of identical data sets with all four sources allows the direct comparison of these characteristics and an evaluation of the suitability of each source for a given site and target.

  17. Harsh-Environment Solid-State Gamma Detector for Down-hole Gas and Oil Exploration

    SciTech Connect (OSTI)

    Peter Sandvik; Stanislav Soloviev; Emad Andarawis; Ho-Young Cha; Jim Rose; Kevin Durocher; Robert Lyons; Bob Pieciuk; Jim Williams; David O'Connor

    2007-08-10

    The goal of this program was to develop a revolutionary solid-state gamma-ray detector suitable for use in down-hole gas and oil exploration. This advanced detector would employ wide-bandgap semiconductor technology to extend the gamma sensor's temperature capability up to 200 C as well as extended reliability, which significantly exceeds current designs based on photomultiplier tubes. In Phase II, project tasks were focused on optimization of the final APD design, growing and characterizing the full scintillator crystals of the selected composition, arranging the APD device packaging, developing the needed optical coupling between scintillator and APD, and characterizing the combined elements as a full detector system preparing for commercialization. What follows is a summary report from the second 18-month phase of this program.

  18. Enhanced Oil Recovery with Downhole Vibration Stimulation in Osage County, Oklahoma

    SciTech Connect (OSTI)

    J. Ford Brett; Robert V. Westermark

    2001-12-31

    This Technical Quarterly Report is for the reporting period September 30, 2001 to December 31, 2001. The report provides details of the work done on the project entitled ''Enhanced Oil Recovery with Downhole Vibration Stimulation in Osage County Oklahoma''. The project is divided into nine separate tasks. Several of the tasks are being worked on simultaneously, while other tasks are dependent on earlier tasks being completed. The vibration stimulation well was permitted as Well 111-W-27, section 8 T26N R6E Osage County Oklahoma. It was spud July 28, 2001 with Goober Drilling Rig No. 3. The well was drilled to 3090-feet cored, logged, cased and cemented. The Rig No.3 moved off August 6, 2001. Phillips Petroleum Co. has performed standard core analysis on the cores recovered from the test well. Standard porosity, permeability and saturation measurements have been conducted. Phillips has begun the sonic stimulation core tests. Calumet Oil Company, the operator of the NBU, has been to collecting both production and injection wells information to establish a baseline for the project in the pilot field test area since May 2001. The 7-inch Downhole Vibration Tool (DHVT) has been built and has been run in a shallow well for initial power source testing. This testing was done in a temporarily abandoned well, Wynona Waterflood Unit, Well No.20-12 operated by Calumet Oil Co both in October and December 2001. The data acquisition system, and rod rotating equipment performed as designed. However, the DHVT experienced two internal failures during vibration operations. The DHVT has been repaired with modifications to improve its functionality. A proposed technical paper abstract has been accepted by the SPE to be presented at the 2002 SPE/DOE Thirteenth Symposium on Improved Oil Recovery, in Tulsa OK, 13-17 April 2002. A one-day SPE sponsored short course which is planned to cover seismic stimulation efforts around the world, will be offered at the SPE/DOE Thirteenth Symposium on Improved Oil Recovery in Tulsa, OK, April 13-17, 2002. Dan Maloney, Phillips and Bob Westermark, OGCI will be the instructors.

  19. Casingless down-hole for sealing an ablation volume and obtaining a sample for analysis

    DOE Patents [OSTI]

    Noble, D.T.; Braymen, S.D.; Anderson, M.S.

    1996-10-01

    A casing-less down hole sampling system for acquiring a subsurface sample for analysis using an inductively coupled plasma system is disclosed. The system includes a probe which is pushed into the formation to be analyzed using a hydraulic ram system. The probe includes a detachable tip member which has a soil point and a barb, with the soil point aiding the penetration of the earth, and the barb causing the tip member to disengage from the probe and remain in the formation when the probe is pulled up. The probe is forced into the formation to be tested, and then pulled up slightly, to disengage the tip member and expose a column of the subsurface formation to be tested. An instrumentation tube mounted in the probe is then extended outward from the probe to longitudinally extend into the exposed column. A balloon seal mounted on the end of the instrumentation tube allows the bottom of the column to be sealed. A source of laser radiation is emitted from the instrumentation tube to ablate a sample from the exposed column. The instrumentation tube can be rotated in the probe to sweep the laser source across the surface of the exposed column. An aerosol transport system carries the ablated sample from the probe to the surface for testing in an inductively coupled plasma system. By testing at various levels in the down-hole as the probe is extracted from the soil, a profile of the subsurface formation may be obtained. 9 figs.

  20. Downhole steam generator with improved preheating/cooling features. [Patent application

    DOE Patents [OSTI]

    Donaldson, A.B.; Hoke, D.E.; Mulac, A.J.

    1980-10-10

    An apparatus is described for downhole steam generation employing dual-stage preheaters for liquid fuel and for the water. A first heat exchange jacket for the fuel surrounds the fuel/oxidant mixing section of the combustor assembly downstream of the fuel nozzle and contacts the top of the combustor unit of the combustor assembly, thereby receiving heat directly from the combustion of the fuel/oxidant. A second stage heat exchange jacket surrounds an upper portion of the oxidant supply line adjacent the fuel nozzle receiving further heat from the compression heat which results from pressurization of the oxidant. The combustor unit includes an inner combustor sleeve whose inner wall defines the combustion zone. The inner combustor sleeve is surrounded by two concentric water channels, one defined by the space between the inner combustor sleeve and an intermediate sleeve, and the second defined by the space between the intermediate sleeve and an outer cylindrical housing. The channels are connected by an annular passage adjacent the top of the combustor assembly and the countercurrent nature of the water flow provides efficient cooling of the inner combustor sleeve. An annular water ejector with a plurality of nozzles is provided to direct water downwardly into the combustor unit at the boundary of the combustion zone and along the lower section of the intermediate sleeve.

  1. Development of a 400 Level 3C Clamped Downhole Seismic Receiver Array for 3D Borehole Seismic Imaging of Gas Reservoirs

    SciTech Connect (OSTI)

    Bjorn N. P. Paulsson

    2006-09-30

    Borehole seismology is the highest resolution geophysical imaging technique available today to the oil and gas industry for characterization and monitoring of oil and gas reservoirs. However, the industry's ability to perform high resolution 3D imaging of deep and complex gas reservoirs using borehole seismology has been hampered by the lack of acquisition technology necessary to record large volumes of high frequency, high signal-to-noise-ratio borehole seismic data. This project took aim at this shortcoming by developing a 400 level 3C clamped downhole seismic receiver array, and accompanying software, for borehole seismic 3D imaging. This large borehole seismic array has removed the technical acquisition barrier for recording the data volumes necessary to do high resolution 3D VSP and 3D cross-well seismic imaging. Massive 3D VSP{reg_sign} and long range Cross-Well Seismology (CWS) are two of the borehole seismic techniques that promise to take the gas industry to the next level in their quest for higher resolution images of deep and complex oil and gas reservoirs. Today only a fraction of the oil or gas in place is produced when reservoirs are considered depleted. This is primarily due to our lack of understanding of detailed compartmentalization of oil and gas reservoirs. In this project, we developed a 400 level 3C borehole seismic receiver array that allows for economic use of 3D borehole seismic imaging for reservoir characterization and monitoring. This new array has significantly increased the efficiency of recording large data volumes at sufficiently dense spatial sampling to resolve reservoir complexities. The receiver pods have been fabricated and tested to withstand high temperature (200 C/400 F) and high pressure (25,000 psi), so that they can operate in wells up to 7,620 meters (25,000 feet) deep. The receiver array is deployed on standard production or drill tubing. In combination with 3C surface seismic or 3C borehole seismic sources, the 400 level receiver array can be used to obtain 3D 9C data. These 9C borehole seismic data provide both compressional wave and shear wave information that can be used for quantitative prediction of rock and pore fluid types. The 400-level borehole receiver array has been deployed successfully in a number of oil and gas wells during the course of this project, and each survey has resulted in marked improvements in imaging of geologic features that are critical for oil or gas production but were previously considered to be below the limits of seismic resolution. This added level of reservoir detail has resulted in improved well placement in the oil and gas fields that have been drilled using the Massive 3D VSP{reg_sign} images. In the future, the 400-level downhole seismic receiver array is expected to continue to improve reservoir characterization and drilling success in deep and complex oil and gas reservoirs.

  2. Waveguide-based ultrasonic and far-field electromagnetic sensors for downhole reservoir characterization.

    SciTech Connect (OSTI)

    Sheen, S. H.; Chien, H. T.; Wang, K.; Liao, S.; Gopalsami, N.; Bakhtiari, S.; Raptis, A. C.; Nuclear Engineering Division

    2010-11-12

    This report summarizes the first year research and development effort leading to development of high-temperature sensors for enhanced geothermal systems. It covers evaluation of ultrasonic and electromagnetic (EM) techniques applied to temperature measurement and flow characterization. On temperature measurement, we have evaluated both microwave radiometry and ultrasonic techniques for temperature gradient and profile measurements. Different antenna designs are evaluated and array loop antenna design is selected for further development. We have also evaluated ultrasonic techniques for total flow characterization, which includes using speed of sound to determine flow temperature, measuring acoustic impedance to estimate fluid density, and using cross-correlation technique to determine the mass flow rate. Method to estimate the flow enthalpy is briefly discussed. At end, the need and proposed techniques to characterize the porosity and permeability of a hot dry rock resource are presented.

  3. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 52, NO. 5, MAY 2004 1449 Time-Domain Measurement of Negative Group

    E-Print Network [OSTI]

    Mojahedi, Mohammad

    ), metamaterials, negative group delay (NGD), negative group velocity (NGV), negative refractive index (NRI). I. It was initially stated that left handedness was equivalent to having a negative group velocity (NGV) [1], and that an NGV is a necessary characteristic of left-handed metamaterials [2]. Additional conflicting assertions

  4. Teaching Techniques 

    E-Print Network [OSTI]

    Howard, Jeff W.

    2005-05-10

    with others such as a small group discussion or the question-answer technique to al- low the 4-H?ers to express their opinion. 2. Illustrated talk This method is an offshoot of the lecture technique, in which the teacher supports the talk with such things... as drawings, posters, copies of articles and other materials. The drawings or posters need not be professional art pieces, they need only be interesting and clear. For ex- ample, in entomology, rather than just talking about the various shapes...

  5. Adsorbed sulfur-gas methods for both near-surface exploration and downhole logging

    SciTech Connect (OSTI)

    Farwell, S.O.; Barinaga, C.J.; Dolenc, M.R.; Farwell, G.H.

    1986-08-01

    The use of sulfur-containing gases in petroleum exploration is supported by (1) the idea that sulfur may play a role in petroleum genesis, (2) the corresponding existence of sulfur-containing compounds in petroleum and the potential for vertical migration of the low-molecular-weight sulfur species from these reservoirs, (3) the production of H/sub 2/S by anaerobic microorganism populations that develop in the subsurface areas overlying petroleum reservoirs due to the concomitant supply of hydrocarbon nutrients, (4) the recent discovery of near-surface accumulations of pyrite and marcasite as the source of induction potential anomalies over certain fields, and (5) the strong adsorptive affinities of sulfur gases to solid surfaces, which enhance both the concentration and localization of such sulfur-expressed anomalies. During the past 3 years, numerous near-surface soil samples and well cuttings from the Utah-Wyoming Overthrust belt have been analyzed for adsorbed sulfur-gas content by two novel analytical techniques: thermal desorption/metal foil collection/flash desorption/sulfur-selective detection (TD/MFC/FD/SSD) and thermal desorption/cryogenic preconcentration/high-resolution-gas chromatography/optimized-flame photometry (TD/CP/HRGC/OFP).

  6. Group X

    SciTech Connect (OSTI)

    Fields, Susannah

    2007-08-16

    This project is currently under contract for research through the Department of Homeland Security until 2011. The group I was responsible for studying has to remain confidential so as not to affect the current project. All dates, reference links and authors, and other distinguishing characteristics of the original group have been removed from this report. All references to the name of this group or the individual splinter groups has been changed to 'Group X'. I have been collecting texts from a variety of sources intended for the use of recruiting and radicalizing members for Group X splinter groups for the purpose of researching the motivation and intent of leaders of those groups and their influence over the likelihood of group radicalization. This work included visiting many Group X websites to find information on splinter group leaders and finding their statements to new and old members. This proved difficult because the splinter groups of Group X are united in beliefs, but differ in public opinion. They are eager to tear each other down, prove their superiority, and yet remain anonymous. After a few weeks of intense searching, a list of eight recruiting texts and eight radicalizing texts from a variety of Group X leaders were compiled.

  7. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM

    SciTech Connect (OSTI)

    Martin E. Cobern

    2004-08-31

    The deep hard rock drilling environment induces severe vibrations into the drillstring, which can cause reduced rates of penetration (ROP) and premature failure of the equipment. The only current means of controlling vibration under varying conditions is to change either the rotary speed or the weight-on-bit (WOB). These changes often reduce drilling efficiency. Conventional shock subs are useful in some situations, but often exacerbate the problems. The objective of this project is development of a unique system to monitor and control drilling vibrations in a ''smart'' drilling system. This system has two primary elements: (1) The first is an active vibration damper (AVD) to minimize harmful axial, lateral and torsional vibrations. The hardness of this damper will be continuously adjusted using a robust, fast-acting and reliable unique technology. (2) The second is a real-time system to monitor drillstring vibration, and related parameters. This monitor adjusts the damper according to local conditions. In some configurations, it may also send diagnostic information to the surface via real-time telemetry. The AVD is implemented in a configuration using magnetorheological (MR) fluid. By applying a current to the magnetic coils in the damper, the viscosity of the fluid can be changed rapidly, thereby altering the damping coefficient in response to the measured motion of the tool. Phase I of this program entailed modeling and design of the necessary subsystems and design, manufacture and test of a full laboratory prototype. Phase I of the project was completed by the revised end date of May 31, 2004. The objectives of this phase were met, and all prerequisites for Phase II have been completed.

  8. Electrochemical Techniques

    SciTech Connect (OSTI)

    Chen, Gang; Lin, Yuehe

    2008-07-20

    Sensitive and selective detection techniques are of crucial importance for capillary electrophoresis (CE), microfluidic chips, and other microfluidic systems. Electrochemical detectors have attracted considerable interest for microfluidic systems with features that include high sensitivity, inherent miniaturization of both the detection and control instrumentation, low cost and power demands, and high compatibility with microfabrication technology. The commonly used electrochemical detectors can be classified into three general modes: conductimetry, potentiometry, and amperometry.

  9. Measurement techniques

    SciTech Connect (OSTI)

    Willis, W.L.

    1980-10-01

    The discussion will be restricted to measurements of voltage and current. Also, although the measurements themselves should be as quantitative as possible, the discussion is rather nonquantitative. Emphasis is on types of instruments, how they may be used, and the inherent advantages and limitations of a given technique. A great deal of information can be obtained from good, clean voltage and current data. Power and impedance are obviously inherent if the proper time relationships are preserved. Often an associated, difficult-to-determine, physical event can be evaluated from the V-I data, such as a time-varying load characteristic, or the time of light emission, etc. The lack of active high voltage devices, such as 50-kV operational amplifiers, restricts measurement devices to passive elements, primarily R and C. There are a few more exotic techniques that are still passive in nature. There are several well-developed techniques for voltage measurements. These include: spark gaps; electrostatic meters; capacitive dividers; mixed RC dividers; and the electro-optic effect. Current is measured by either direct measurement of charge flow or by measuring the resulting magnetic field.

  10. Automata groups 

    E-Print Network [OSTI]

    Muntyan, Yevgen

    2010-01-16

    automata over the alphabet of 2 letters and 2-state automata over the 3-letter alphabet. We continue the classification work started by the research group at Texas A&M University ([BGK+07a, BGK+07b]) and further reduce the number of pairwise nonisomorphic...

  11. Review of well-logging techniques. [For use in remedial action programs

    SciTech Connect (OSTI)

    Olsen, K.B.; Young, J.A.; Thomas, V.W.

    1983-04-01

    A literature review has been conducted to determine whether suitable borehole-logging techniques exist for the measurement of gamma-ray-emitting elements using downhole detectors. Most of the methods that have been used for the last 30 years by the uranium-exploration industry involve passive gamma-ray measurement techniques utilizing NaI(Tl) and, occasionally, intrinsic germanium detectors. Parameters the industry has had to consider in calibrating these detectors are variations in (1) casing material and thickness, (2) water in the borehole, (3) hole diameter, (4) disequilibrium between uranium and its daughters in the ore zone, (5) spatial distribution of the radioactive material, and (6) dead time of the analyzer. The methods they have used to address these variable parameters appear to be applicable to remedial action programs. The techniques that have been used for the measurement of subsurface radium concentration by DOE during the engineering assessment of UMTRAP/FUSRAP sites and by NRC at one remedial action site will be described in this report.

  12. Advisory Group On The Application Of Nuclear Techniques To Geothermal

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand DaltonSolar Energy LLCAdemaInformationwebsite Jump to:

  13. GROUP STUDY ROOMS GROUP STUDY ROOMS

    E-Print Network [OSTI]

    Young, R. Michael

    STAFF AREA LEVEL 2 LOBBY bookBot GROUP STUDY ROOMS GROUP STUDY ROOMS GROUPSTUDYROOMS RAIN GARDEN LIBRARY TECHNOLOGY AND MEDIA SPACES GROUP STUDY EVENT AND MEETING SPACES STAFF ONLY STAIRS INSTITUTES AND UNIVERSITY CENTERS #12;GROUP STUDY ROOMS MAKER SPACE LEARNING COMMONS LOCKERS LOCKERS LOCKERS TEACHING

  14. Stargate: Energy Management Techniques

    E-Print Network [OSTI]

    Vijay Raghunathan; Mani Srivastava; Trevor Pering; Roy Want

    2004-01-01

    Stargate: Energy Management Techniques Vijay Raghunathan,Platform specific energy management is crucial for longSolution: System level energy management techniques and

  15. Properties of Group Five and Group Seven transactinium elements

    E-Print Network [OSTI]

    Wilk, Philip A.

    2001-01-01

    of Group Five and Group Seven Transactinium Elementsof Group Five and Group Seven Transactinium Elements byof Group Five and Group Seven Transactinium Elements by

  16. AIR INFILTRATION MEASUREMENT TECHNIQUES

    E-Print Network [OSTI]

    Sherman, M.H.

    2013-01-01

    serious study of research problems in infiltration. THEORYInfiltration Measurement Techniques REFERENCES J .B. Dick, "Experimental Studies

  17. TEC Working Group Topic Groups Tribal

    Broader source: Energy.gov [DOE]

    The Tribal Topic Group was established in January 1998 to address government-to-government consultation between DOE and Indian Tribes affected by its transportation activities. The group focuses on...

  18. Silent Study Group Study

    E-Print Network [OSTI]

    Thompson, Michael

    36/72 36/7236/72 36/72 36/72 Silent Study Room 108C Group Study Room 108J Office Room 108A Office Room 108B Staff Room Room 108K Group Study Room 108I Group Study Room 108H Group Study Room 108G Group Study Room 108F Group Study Room 108E Group Study Room 108D Service Area Research Help / Circulation

  19. Category:Drilling Techniques | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,Cammack Village,8199089°,AnalyticalCuttings AnalysisDownhole FluidDrilling

  20. Matrix Groups Max Neunhffer

    E-Print Network [OSTI]

    St Andrews, University of

    Matrix Groups Max Neunhöffer Introduction GAP examples Matrix groups in GAP Schreier-Sims Problems Group algebras SLPs Constructive recognition The problem Troubles Matrix Groups Max Neunhöffer University of St Andrews GAC 2010, Allahabad #12;Matrix Groups Max Neunhöffer Introduction GAP examples

  1. GROUP THERAPY Syracuse University

    E-Print Network [OSTI]

    McConnell, Terry

    your individual needs. In a group, up to eight students meet with one or two group therapists. MostGROUP THERAPY Syracuse University Counseling Center 200 Walnut Place Phone: 315-443-4715 Fax: 315-443-4276 counselingcenter.syr.edu WHAT STUDENTS SAY ABOUT GROUP THERAPY I was really anxious about joining a group

  2. Assessor Training Assessment Techniques

    E-Print Network [OSTI]

    NVLAP Assessor Training Assessment Techniques: Communication Skills and Conducting an Assessment listener ·Knowledgeable Assessor Training 2009: Assessment Techniques: Communication Skills & Conducting, truthful, sincere, discrete · Diplomatic · Decisive · Selfreliant Assessor Training 2009: Assessment

  3. GRAYSTONE GROUP ADVERTISING

    E-Print Network [OSTI]

    Wu, Shin-Tson

    and GRAYSTONE GROUP ADVERTISING Partnership The University Central Florida has partnered with the Graystone Group for the purposes of facilitating recruitment advertising services. Benefits of partnering evaluations. Placing Recruitment Advertising: · Graystone Group is available to support all your recruitment

  4. TEC Working Group Topic Groups Archives Communications

    Broader source: Energy.gov [DOE]

    The Communications Topic Group was convened in April 1998 to improve internal and external strategic level communications regarding DOE shipments of radioactive and other hazardous materials.

  5. Microsystems and Nanotechnology Group

    E-Print Network [OSTI]

    Pulfrey, David L.

    and energy storage. #12;Microsystems and Nanotechnology Group Microsystems and Nanotechnology Group 2, catalytic chemical vapor deposition of carbon nanotubes, nanowire (silicon, germanium) growth, nanocom

  6. Specific Group Hardware

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

    Specific Group Hardware Specific Group Hardware ALICE palicevo1 The Virtual Organization (VO) server. Serves as gatekeeper for ALICE jobs. It's duties include getting assignments...

  7. The lunar Askaryan technique: a technical roadmap

    E-Print Network [OSTI]

    Bray, J D; Buitink, S; Dagkesamanskii, R D; Ekers, R D; Falcke, H; Gayley, K G; Huege, T; James, C W; Mevius, M; Mutel, R L; Protheroe, R J; Scholten, O; Spencer, R E; ter Veen, S

    2015-01-01

    The lunar Askaryan technique, which involves searching for Askaryan radio pulses from particle cascades in the outer layers of the Moon, is a method for using the lunar surface as an extremely large detector of ultra-high-energy particles. The high time resolution required to detect these pulses, which have a duration of around a nanosecond, puts this technique in a regime quite different from other forms of radio astronomy, with a unique set of associated technical challenges which have been addressed in a series of experiments by various groups. Implementing the methods and techniques developed by these groups for detecting lunar Askaryan pulses will be important for a future experiment with the Square Kilometre Array (SKA), which is expected to have sufficient sensitivity to allow the first positive detection using this technique. Key issues include correction for ionospheric dispersion, beamforming, efficient triggering, and the exclusion of spurious events from radio-frequency interference. We review the...

  8. TEC Working Group Topic Groups Archives Protocols

    Broader source: Energy.gov [DOE]

    The Transportation Protocols Topic Group serves as an important vehicle for DOE senior managers to assess and incorporate stakeholder input into the protocols process. The Topic Group was formed to review a series of transportation protocols developed in response to a request for DOE to be more consistent in its approach to transportation.

  9. FTN4 OPTIMIZATION TECHNIQUES.

    E-Print Network [OSTI]

    Authors, Various

    2012-01-01

    3 1st Edition FTN4 OPTIMIZATION TECHNIQUES November 1979O. INTRODUCTION 1. COt1PILER OPTIMIZATIONS 2. SOURCE CODEcode. Most of these optimizations decrease central processor

  10. Downhole Sensor Holds Transformative Potential | Department of...

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

    industrial-scale variable speed drive motors to power electronics for a modern electric grid. Testing of the components developed by GE with the active electronic devices and...

  11. Link module for a downhole drilling network

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Fox, Joe (Provo, UT)

    2007-05-29

    A repeater is disclosed in one embodiment of the present invention as including a cylindrical housing, characterized by a proximal end and a distal end, and having a substantially cylindrical wall, the cylindrical wall defining a central bore passing therethrough. The cylindrical housing is formed to define at least one recess in the cylindrical wall, into which a repeater is inserted. The cylindrical housing also includes an annular recess formed into at least one of the proximal end and the distal end. An annular transmission element, operably connected to the repeater, is located in the annular recess. In selected embodiments, the annular transmission element inductively converts electrical energy to magnetic energy. In other embodiments, the annular transmission element includes an electrical contact to transmit electrical energy directly to another contact.

  12. Coiled tubing solves multiple downhole problems

    SciTech Connect (OSTI)

    Bedford, S. ); Smith, I. )

    1994-11-01

    Declining reservoir pressure and water breakthrough in the UK North Sea Magnus field has coincided with general advances in application of coiled tubing and a continuous drive to reduce operating costs, particularly in a climate of weak oil prices. These factors have led to a dramatic increase in diversity and volume of coiled tubing interventions. In the following article, coiled tubing interventions, and results of those interventions, are discussed. An assessment of future coiled tubing activity on Magnus field is provided.

  13. Multipurpose Acoustic Sensor for Downhole Fluid Monitoring

    Broader source: Energy.gov [DOE]

    Novel sensor design based on acoustics. Determine in real-timeand in a single sensor packagemultiple parameters: temperature, pressure, fluid flow; and fluid properties, such as density, viscosity, fluid composition.

  14. Down-hole periodic seismic generator

    DOE Patents [OSTI]

    Hardee, H.C.; Hills, R.G.; Striker, R.P.

    1982-10-28

    A down hole periodic seismic generator system is disclosed for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

  15. Downhole Fluid Sampling | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstrumentsArea (DOEDixmont,Missouri:Dow ChemicalDowners

  16. Downhole Fluid Sampling | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstrumentsArea (DOEDixmont,Missouri:Dow ChemicalDowners

  17. TEC Working Group Topic Groups Manual Review

    Broader source: Energy.gov [DOE]

    This group is responsible for the update of DOE Manual 460.2-1, Radioactive Material Transportation Practices Manual.  This manual was issued on September 23, 2002, and establishes a set of...

  18. TEC Working Group Topic Groups Archives Consolidated Grant Topic Group

    Broader source: Energy.gov [DOE]

    The Consolidated Grant Topic Group arose from recommendations provided by the TEC and other external parties to the DOE Senior Executive Transportation Forum in July 1998. It was proposed that the consolidation of multiple funding streams from numerous DOE sources into a single grant would provide a more equitable and efficient means of assistance to States and Tribes affected by DOE nuclear material shipments.

  19. Contamination Control Techniques

    SciTech Connect (OSTI)

    EBY, J.L.

    2000-05-16

    Welcome to a workshop on contamination Control techniques. This work shop is designed for about two hours. Attendee participation is encouraged during the workshop. We will address different topics within contamination control techniques; present processes, products and equipment used here at Hanford and then open the floor to you, the attendees for your input on the topics.

  20. Tritium Focus Group- INEL

    Broader source: Energy.gov [DOE]

    Presentation from the 34th Tritium Focus Group Meeting held in Idaho Falls, Idaho on September 23-25, 2014.

  1. RESEARCH GROUP MANUFACTURING

    E-Print Network [OSTI]

    Psarrakos, Panayiotis

    RESEARCH GROUP MANUFACTURING ADDITIVE www.lboro.ac.uk/amrg PhD Studentships in Additive by the Additive Manufacturing Research Group is based around a family of processes comprising of adding layers Additive Manufacturing Research Group in the Wolfson School of Mechanical & Manufacturing Engineering

  2. Grouped exposed metal heaters

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Coit, William George (Bellaire, TX); Griffin, Peter Terry (Brixham, GB); Hamilton, Paul Taylor (Houston, TX); Hsu, Chia-Fu (Granada Hills, CA); Mason, Stanley Leroy (Allen, TX); Samuel, Allan James (Kular Lumpar, ML); Watkins, Ronnie Wade (Cypress, TX)

    2012-07-31

    A system for treating a hydrocarbon containing formation is described. The system includes two or more groups of elongated heaters. The group includes two or more heaters placed in two or more openings in the formation. The heaters in the group are electrically coupled below the surface of the formation. The openings include at least partially uncased wellbores in a hydrocarbon layer of the formation. The groups are electrically configured such that current flow through the formation between at least two groups is inhibited. The heaters are configured to provide heat to the formation.

  3. Grouped exposed metal heaters

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Coit, William George (Bellaire, TX); Griffin, Peter Terry (Brixham, GB); Hamilton, Paul Taylor (Houston, TX); Hsu, Chia-Fu (Granada Hills, CA); Mason, Stanley Leroy (Allen, TX); Samuel, Allan James (Kular Lumpar, MY); Watkins, Ronnie Wade (Cypress, TX)

    2010-11-09

    A system for treating a hydrocarbon containing formation is described. The system includes two or more groups of elongated heaters. The group includes two or more heaters placed in two or more openings in the formation. The heaters in the group are electrically coupled below the surface of the formation. The openings include at least partially uncased wellbores in a hydrocarbon layer of the formation. The groups are electrically configured such that current flow through the formation between at least two groups is inhibited. The heaters are configured to provide heat to the formation.

  4. Some applications of pipelining techniques in parallel scientific computing 

    E-Print Network [OSTI]

    Deng, Yuanhua

    1996-01-01

    columnwise partitioning schemes. For chasing algorithms, in addition to the pipelining, we apply block-cyclic partitioning, group message-passing techniques to enhance the performance of the pipelined parallel algorithms. The numerical results for the use...

  5. Detector Support Group

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

    browser. Concerns? Hall B Navigation DSG Home Staff Presentations Notes print version Detector Support Group Spotlight Archive Index Rotation test for the SVT detector EPICS...

  6. JLab Users Group

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

    UserResearcher Information print version UG Resources Background & Purpose Users Group Wiki By Laws Board of Directors Board of Directors Minutes Directory of Members Events...

  7. Mechanical Engineering & Thermal Group

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    LASP's mechanical analysts also lead mechanical verification testing including: random vibration, forceMechanical Engineering & Thermal Group The Mechanical Engineering (ME) & Thermal Group at LASP has, and ground- based mechanical systems. Instrument Design Building on decades of design experience that has

  8. TEC Working Group Topic Groups Archives Protocols Meeting Summaries...

    Office of Environmental Management (EM)

    Working Group Topic Groups Archives Protocols Meeting Summaries Meeting Summaries Philadelphia TEC Meeting, Protocols Topic Group Summary - July 1999 Jacksonville TEC Meeting,...

  9. Group field theories generating polyhedral complexes

    E-Print Network [OSTI]

    Johannes Thürigen

    2015-06-28

    Group field theories are a generalization of matrix models which provide both a second quantized reformulation of loop quantum gravity as well as generating functions for spin foam models. While states in canonical loop quantum gravity, in the traditional continuum setting, are based on graphs with vertices of arbitrary valence, group field theories have been defined so far in a simplicial setting such that states have support only on graphs of fixed valency. This has led to the question whether group field theory can indeed cover the whole state space of loop quantum gravity. In this contribution based on [1] I present two new classes of group field theories which satisfy this objective: i) a straightforward, but rather formal generalization to multiple fields, one for each valency and ii) a simplicial group field theory which effectively covers the larger state space through a dual weighting, a technique common in matrix and tensor models. To this end I will further discuss in some detail the combinatorial structure of the complexes generated by the group field theory partition function. The new group field theories do not only strengthen the links between the mentioned quantum gravity approaches but, broadening the theory space of group field theories, they might also prove useful in the investigation of renormalizability.

  10. Query Optimization Techniques Class Hierarchies

    E-Print Network [OSTI]

    Mannheim, Universität

    Query Optimization Techniques Exploiting Class Hierarchies Sophie Cluet 1 Guido Moerkotte 2 1 INRIA Since the introduction of object base management systems (OBMS), many query optimization techniques tailored for object query languages have been proposed. They adapt known optimization techniques

  11. Rhodes 801-A Rhodes 801-B Group 1: Group 1

    E-Print Network [OSTI]

    Cahay, Marc

    Marie Group 3: Group 3: Bennett, Christopher Paul Davenport, Austin Lovell Creech, Nathan Alan Colburn Worcester, Austin Thomas Group 8: Group 8: TableATableBTableCTableD TableATableBTableCTableD #12;Rhodes 801

  12. Central extensions of Current Groups and the Jacobi Group 

    E-Print Network [OSTI]

    Docherty, Pamela Jane

    2012-11-28

    A current group GX is an infinite-dimensional Lie group of smooth maps from a smooth manifold X to a finite-dimensional Lie group G, endowed with pointwise multiplication. This thesis concerns current groups G§ for compact ...

  13. Biomechanical Classification of Judo Throwing Techniques (Nage Waza)

    E-Print Network [OSTI]

    Attilio Sacripanti

    2008-06-25

    In this paper it is applied the classic mechanical point of view to classify all the movements known as throwing judo techniques; the application of the Newtonian physical methods and principles is able to rationalize the whole matter and to group under only two very simple and clear principles all the movements, before grouped in many generic and not very clear way.

  14. Exoplanet Detection Techniques

    E-Print Network [OSTI]

    Fischer, Debra A; Laughlin, Greg P; Macintosh, Bruce; Mahadevan, Suvrath; Sahlmann, Johannes; Yee, Jennifer C

    2015-01-01

    We are still in the early days of exoplanet discovery. Astronomers are beginning to model the atmospheres and interiors of exoplanets and have developed a deeper understanding of processes of planet formation and evolution. However, we have yet to map out the full complexity of multi-planet architectures or to detect Earth analogues around nearby stars. Reaching these ambitious goals will require further improvements in instrumentation and new analysis tools. In this chapter, we provide an overview of five observational techniques that are currently employed in the detection of exoplanets: optical and IR Doppler measurements, transit photometry, direct imaging, microlensing, and astrometry. We provide a basic description of how each of these techniques works and discuss forefront developments that will result in new discoveries. We also highlight the observational limitations and synergies of each method and their connections to future space missions.

  15. Resin infiltration transfer technique

    DOE Patents [OSTI]

    Miller, David V. (Pittsburgh, PA); Baranwal, Rita (Glenshaw, PA)

    2009-12-08

    A process has been developed for fabricating composite structures using either reaction forming or polymer infiltration and pyrolysis techniques to densify the composite matrix. The matrix and reinforcement materials of choice can include, but are not limited to, silicon carbide (SiC) and zirconium carbide (ZrC). The novel process can be used to fabricate complex, net-shape or near-net shape, high-quality ceramic composites with a crack-free matrix.

  16. Image compression technique

    DOE Patents [OSTI]

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

    1997-03-25

    An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace`s equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image. 16 figs.

  17. Image compression technique

    DOE Patents [OSTI]

    Fu, Chi-Yung (San Francisco, CA); Petrich, Loren I. (Livermore, CA)

    1997-01-01

    An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace's equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image.

  18. Shift Invariant Spaces on Lca Groups

    E-Print Network [OSTI]

    Cabrelli, Carlos

    2009-01-01

    In this article we extend the theory of shift-invariant spaces to the context of LCA groups. We introduce the notion of H-invariant space for a countable discrete subgroup H of an LCA group G, and show that the concept of range function and the techniques of fiberization are valid in this context. As a consequence of this generalization we prove characterizations of frames and Riesz bases of these spaces extending previous results, that were known for Rd and the lattice Zd .

  19. Summary Report from the Accelerator Working Group M. Harrison

    E-Print Network [OSTI]

    Wurtele, Jonathan

    colliders, muon colliders, very high energy hadron colliders, and advanced acceleration techniques Group at Snowmass was organized into five working sub-groups (all energies refer to center-of-mass): 1 of the community with respect to technical issues and identification of possible paths to a 1.5 TeV collision

  20. Illinois Wind Workers Group

    SciTech Connect (OSTI)

    David G. Loomis

    2012-05-28

    The Illinois Wind Working Group (IWWG) was founded in 2006 with about 15 members. It has grown to over 200 members today representing all aspects of the wind industry across the State of Illinois. In 2008, the IWWG developed a strategic plan to give direction to the group and its activities. The strategic plan identifies ways to address critical market barriers to the further penetration of wind. The key to addressing these market barriers is public education and outreach. Since Illinois has a restructured electricity market, utilities no longer have a strong control over the addition of new capacity within the state. Instead, market acceptance depends on willing landowners to lease land and willing county officials to site wind farms. Many times these groups are uninformed about the benefits of wind energy and unfamiliar with the process. Therefore, many of the project objectives focus on conferences, forum, databases and research that will allow these stakeholders to make well-educated decisions.

  1. Applied ALARA techniques

    SciTech Connect (OSTI)

    Waggoner, L.O.

    1998-02-05

    The presentation focuses on some of the time-proven and new technologies being used to accomplish radiological work. These techniques can be applied at nuclear facilities to reduce radiation doses and protect the environment. The last reactor plants and processing facilities were shutdown and Hanford was given a new mission to put the facilities in a safe condition, decontaminate, and prepare them for decommissioning. The skills that were necessary to operate these facilities were different than the skills needed today to clean up Hanford. Workers were not familiar with many of the tools, equipment, and materials needed to accomplish:the new mission, which includes clean up of contaminated areas in and around all the facilities, recovery of reactor fuel from spent fuel pools, and the removal of millions of gallons of highly radioactive waste from 177 underground tanks. In addition, this work has to be done with a reduced number of workers and a smaller budget. At Hanford, facilities contain a myriad of radioactive isotopes that are 2048 located inside plant systems, underground tanks, and the soil. As cleanup work at Hanford began, it became obvious early that in order to get workers to apply ALARA and use hew tools and equipment to accomplish the radiological work it was necessary to plan the work in advance and get radiological control and/or ALARA committee personnel involved early in the planning process. Emphasis was placed on applying,ALARA techniques to reduce dose, limit contamination spread and minimize the amount of radioactive waste generated. Progress on the cleanup has,b6en steady and Hanford workers have learned to use different types of engineered controls and ALARA techniques to perform radiological work. The purpose of this presentation is to share the lessons learned on how Hanford is accomplishing radiological work.

  2. EdgeWrite: A New Text Entry Technique Designed for Stability EdgeWrite: A New Text Entry Technique Designed for Stability

    E-Print Network [OSTI]

    Wobbrock, Jacob O.

    EdgeWrite: A New Text Entry Technique Designed for Stability Page 1 EdgeWrite: A New Text Entry of cost, complexity, and maintenance (2). If we had a text entry technique that could be used that benefits one group may therefore benefit the other. #12;EdgeWrite: A New Text Entry Technique Designed

  3. Applied Science/Techniques

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery ActTools to someone byApplied Science/Techniques

  4. Upgraded Coal Interest Group

    SciTech Connect (OSTI)

    Evan Hughes

    2009-01-08

    The Upgraded Coal Interest Group (UCIG) is an EPRI 'users group' that focuses on clean, low-cost options for coal-based power generation. The UCIG covers topics that involve (1) pre-combustion processes, (2) co-firing systems and fuels, and (3) reburn using coal-derived or biomass-derived fuels. The UCIG mission is to preserve and expand the economic use of coal for energy. By reducing the fuel costs and environmental impacts of coal-fired power generation, existing units become more cost effective and thus new units utilizing advanced combustion technologies are more likely to be coal-fired.

  5. Bell, group and tangle

    SciTech Connect (OSTI)

    Solomon, A. I.

    2010-03-15

    The 'Bell' of the title refers to bipartite Bell states, and their extensions to, for example, tripartite systems. The 'Group' of the title is the Braid Group in its various representations; while 'Tangle' refers to the property of entanglement which is present in both of these scenarios. The objective of this note is to explore the relation between Quantum Entanglement and Topological Links, and to show that the use of the language of entanglement in both cases is more than one of linguistic analogy.

  6. 12. Automatic Groups Suppose

    E-Print Network [OSTI]

    Gilman, Robert

    for the generator a to the automaton in Figure 1, we obtain a synchronized automaton which accepts a linear language12. Automatic Groups Suppose : G is a choice of generators, and R is a rational language which are all synchronous and rational. We will define synchronous presently. R and are called an automatic

  7. Data Mining Group VNG Corporation

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Data Mining Group VNG Corporation Data Mining Group_VNG Corporation 1 #12;Data Mining Group_VNG Corporation 2 1 ·Introduction 2 ·Edge Rank 3 ·Parameter Estimate 4 ·Conclusion #12;Data Mining Group_VNG Corporation 3 #12;Data Mining Group_VNG Corporation 4 #12; User's self activity Update status Write blogs

  8. TEC Working Group Topic Groups Archives Communications Conference...

    Office of Environmental Management (EM)

    Communications Conference Call Summaries TEC Working Group Topic Groups Archives Communications Conference Call Summaries Conference Call Summaries Conference Call Summary April...

  9. TEC Working Group Topic Groups Routing Conference Call Summaries...

    Office of Environmental Management (EM)

    Routing Conference Call Summaries TEC Working Group Topic Groups Routing Conference Call Summaries CONFERENCE CALL SUMMARIES January 31, 2008 December 6, 2007 October 4, 2007...

  10. TEC Working Group Topic Groups Security Conference Call Summaries...

    Office of Environmental Management (EM)

    Conference Call Summaries TEC Working Group Topic Groups Security Conference Call Summaries Conference Call Summaries August 17, 2006 (Draft) July 18, 2006 (Draft) June 20, 2006...

  11. TEC Working Group Topic Groups Archives Mechanics of Funding...

    Office of Environmental Management (EM)

    Mechanics of Funding and Techical Assistance TEC Working Group Topic Groups Archives Mechanics of Funding and Techical Assistance Mechanics of Funding and Techical Assistance Items...

  12. CORRELATION BETWEEN GROUP LOCAL DENSITY AND GROUP LUMINOSITY

    SciTech Connect (OSTI)

    Deng Xinfa; Yu Guisheng

    2012-11-10

    In this study, we investigate the correlation between group local number density and total luminosity of groups. In four volume-limited group catalogs, we can conclude that groups with high luminosity exist preferentially in high-density regions, while groups with low luminosity are located preferentially in low-density regions, and that in a volume-limited group sample with absolute magnitude limit M{sub r} = -18, the correlation between group local number density and total luminosity of groups is the weakest. These results basically are consistent with the environmental dependence of galaxy luminosity.

  13. TEC Working Group Topic Groups Rail Meeting Summaries | Department...

    Office of Environmental Management (EM)

    - March 15, 2006 Pueblo TEC Meeting, Rail Topic Group Summary - September 22, 2005 Phoenix TEC Meeting, Rail Topic Group Summary - April 4, 2005 Minneapolis TEC Meeting, Rail...

  14. Power Systems Group Home Page

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

    Systems Division Search APS ... Search Button About ASD General Information ASD Groups ESHQA Operations Argonne Home > Advanced Photon Source > Power Systems Group This page is...

  15. Using Groupings of Static Analysis Alerts to Identify Files Likely to Contain Field Failures

    E-Print Network [OSTI]

    Sherriff, Mark S.

    of a field failure. Our technique uses singular value decomposition to generate groupings of static analysisUsing Groupings of Static Analysis Alerts to Identify Files Likely to Contain Field Failures Mark S@csc.ncsu.edu ABSTRACT In this paper, we propose a technique for leveraging historical field failure records

  16. ALS Communications Group

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve4AJ01) (See Energy Level79AJ01)19^ U N I T ECommunications Group

  17. Working Group Reports

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking WithTelecentricNCubictheThepresented in1: Model or Working Group

  18. Helms Research Group - Home

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journalvivo Low-DoseOptions forHeavy-Duty Waste HaulerHeikoHe,Helms Group

  19. Research Groups - Cyclotron Institute

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAboutNuclearPrincipalResearchResearchResearch Groups

  20. Running Jobs by Group

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) byMultidayAlumni > The Energy MaterialsRooftopRunning Jobs by Group

  1. DOE STGWG Group

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

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electric vehicle10nominateEnergyThis memo fromDepartment ofSTGWG Group

  2. Technique for fast and efficient hierarchical clustering

    DOE Patents [OSTI]

    Stork, Christopher

    2013-10-08

    A fast and efficient technique for hierarchical clustering of samples in a dataset includes compressing the dataset to reduce a number of variables within each of the samples of the dataset. A nearest neighbor matrix is generated to identify nearest neighbor pairs between the samples based on differences between the variables of the samples. The samples are arranged into a hierarchy that groups the samples based on the nearest neighbor matrix. The hierarchy is rendered to a display to graphically illustrate similarities or differences between the samples.

  3. Steam Generator Group Project. Task 6. Channel head decontamination

    SciTech Connect (OSTI)

    Allen, R.P.; Clark, R.L.; Reece, W.D.

    1984-08-01

    The Steam Generator Group Project utilizes a retired-from-service pressurized-water-reactor steam generator as a test bed and source of specimens for research. An important preparatory step to primary side research activities was reduction of the radiation field in the steam generator channel head. This task report describes the channel head decontamination activities. Though not a programmatic research objective it was judged beneficial to explore the use of dilute reagent chemical decontamination techniques. These techniques presented potential for reduced personnel exposure and reduced secondary radwaste generation, over currently used abrasive blasting techniques. Two techniques with extensive laboratory research and vendors prepared to offer commercial application were tested, one on either side of the channel head. As indicated in the report, both techniques accomplished similar decontamination objectives. Neither technique damaged the generator channel head or tubing materials, as applied. This report provides details of the decontamination operations. Application system and operating conditions are described.

  4. Dose Reduction Techniques

    SciTech Connect (OSTI)

    WAGGONER, L.O.

    2000-05-16

    As radiation safety specialists, one of the things we are required to do is evaluate tools, equipment, materials and work practices and decide whether the use of these products or work practices will reduce radiation dose or risk to the environment. There is a tendency for many workers that work with radioactive material to accomplish radiological work the same way they have always done it rather than look for new technology or change their work practices. New technology is being developed all the time that can make radiological work easier and result in less radiation dose to the worker or reduce the possibility that contamination will be spread to the environment. As we discuss the various tools and techniques that reduce radiation dose, keep in mind that the radiological controls should be reasonable. We can not always get the dose to zero, so we must try to accomplish the work efficiently and cost-effectively. There are times we may have to accept there is only so much you can do. The goal is to do the smart things that protect the worker but do not hinder him while the task is being accomplished. In addition, we should not demand that large amounts of money be spent for equipment that has marginal value in order to save a few millirem. We have broken the handout into sections that should simplify the presentation. Time, distance, shielding, and source reduction are methods used to reduce dose and are covered in Part I on work execution. We then look at operational considerations, radiological design parameters, and discuss the characteristics of personnel who deal with ALARA. This handout should give you an overview of what it takes to have an effective dose reduction program.

  5. March, 2001 Neutron Scattering Group

    E-Print Network [OSTI]

    Johnson, Peter D.

    March, 2001 Neutron Scattering Group A High Performance Hybrid Spectrometer for theA High of the instrument performance · Igor Zaliznyak · Laurence Passell OutlineOutline #12;Neutron Scattering GroupNeutron states in single crystals.single crystals. #12;Neutron Scattering GroupNeutron Scattering Group What

  6. High Temperature Membrane Working Group

    Broader source: Energy.gov [DOE]

    This presentation provides an overview of the High Temperature Membrane Working Group Meeting in May 2007.

  7. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 1999 prepared by: Data Management Group Joint Program APPENDIX A: DATA REQUESTS ..................................... 11 #12;Data Management Group 1999 Annual Report Page 1 of 14 INTRODUCTION The Data Management Group is a research project located at the Joint

  8. Winter 2015 Positive Parenting Group

    E-Print Network [OSTI]

    Winter 2015 Positive Parenting Group This is an eight-week parent group series starting Monday, January 12, 2015 Future parent group sessions to be held: January 26 (no group 19th ) February 2, 9 and 23 (no group 16th ) and March 2, 9 and 16 6:00 p.m. to 8:00 p.m. Room 145 of the Clinical Services

  9. Working Group Report: Sensors

    SciTech Connect (OSTI)

    Artuso, M.; et al.,

    2013-10-18

    Sensors play a key role in detecting both charged particles and photons for all three frontiers in Particle Physics. The signals from an individual sensor that can be used include ionization deposited, phonons created, or light emitted from excitations of the material. The individual sensors are then typically arrayed for detection of individual particles or groups of particles. Mounting of new, ever higher performance experiments, often depend on advances in sensors in a range of performance characteristics. These performance metrics can include position resolution for passing particles, time resolution on particles impacting the sensor, and overall rate capabilities. In addition the feasible detector area and cost frequently provides a limit to what can be built and therefore is often another area where improvements are important. Finally, radiation tolerance is becoming a requirement in a broad array of devices. We present a status report on a broad category of sensors, including challenges for the future and work in progress to solve those challenges.

  10. Diagnostic techniques used in AVLIS

    SciTech Connect (OSTI)

    Heestand, G.M.; Beeler, R.G.

    1992-12-01

    This is the second part of a general overview talk on the atomic vapor laser isotope separation (AVLIS) process. In this presentation the authors will discuss the diagnostic techniques used to measure key parameters in their atomic vapor including densities, temperature, velocities charge exchange rates and background ionization levels. Although these techniques have been extensively applied to their uranium program they do have applicability to other systems. Relevant data demonstrating these techniques will be shown.

  11. Profiler Instrumentation Using Metaprogramming Techniques

    E-Print Network [OSTI]

    Gray, Jeffrey G.

    Profiler Instrumentation Using Metaprogramming Techniques Ritu Arora, Yu Sun, Zekai Demirezen, Jeff manipulation) before it enters into the available class pool of an executing application. Javassist [9] (see

  12. Low Temperature Material Bonding Technique

    DOE Patents [OSTI]

    Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

    2000-10-10

    A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

  13. Low temperature material bonding technique

    DOE Patents [OSTI]

    Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

    2002-02-12

    A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

  14. Neil 65 Group Picture Neil 65 Group Picture

    E-Print Network [OSTI]

    Mohar, Bojan

    Neil 65 Group Picture Neil 65 Group Picture December 14, 2003 Row 1: Tom Dowling, Nolan Mc Glover, Mike Lohman, Sangil Oum, Blair Dowling http://www.math.ohio-state.edu/~maharry/Neil65/pictures/Neil65GroupPicture.html25.9.2004 18:19:04 #12;

  15. Electromagnetic Interrogation Techniques Damage Detection

    E-Print Network [OSTI]

    Electromagnetic Interrogation Techniques for Damage Detection H. T. Banks and M. L. Joyner Center.P. Winfree Nasa Langley Research Center Hampton, VA Plenary Lecture, Electromagnetic Nondestructive Evaluation 2001 (ENDE 2001), Kobe, Japan, May 18-19, 20001 #12;Electromagnetic Interrogation Techniques

  16. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2000 prepared by: Data Management Group Joint Program PROCESSING ...................................................2 Text Based Data Retrieval System `drs'.................................2 Internet Browser Data Retrieval System (iDRS).....................3 Complex Data Requests

  17. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    iv Data Management Group Annual Report 2003 City of Hamilton City of Toronto GO Transit Regional of York Toronto Transit Commission The Data Management Group is a research program located ........................................................................................................ 3 Text-based Data Retrieval System `drs

  18. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2001 prepared by: Data Management Group Joint Program..............................................................................2 Text Based Data Retrieval System `drs' ..........................................................2 Internet Browser Data Retrieval System (iDRS)..............................................3 Complex Data

  19. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2002 prepared by: Data Management Group Joint Program Based Data Retrieval System `drs' ............................................... 3 Internet Browser Data Retrieval System (iDRS) .................................. 4 Complex Data Requests

  20. Review of Airflow Measurement Techniques Jennifer McWilliams

    E-Print Network [OSTI]

    . This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Building of Buildings Group Environmental Energy Technologies Division Lawrence Berkeley National Laboratory BerkeleyLBNL-49747 Review of Airflow Measurement Techniques Jennifer McWilliams Energy Performance

  1. Sensitivity to parameter and data variations in dimensionality reduction techniques

    E-Print Network [OSTI]

    Verleysen, Michel

    - Machine Learning Group ICTEAM/ELEN - Place du Levant, 3 1348 Louvain-la-Neuve, Belgium 3- Univ. Catholique, Belgium Abstract. Dimensionality reduction techniques aim at representing high- dimensional data of data is available in many different fields, such as medical imaging, process control and text mining

  2. Interagency Sustainability Working Group | Department of Energy

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

    Sustainability Working Group Interagency Sustainability Working Group The Interagency Sustainability Working Group (ISWG) is the coordinating body for sustainable federal...

  3. Interagency Sustainability Working Group | Department of Energy

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

    Program Areas Sustainable Buildings & Campuses Interagency Sustainability Working Group Interagency Sustainability Working Group The Interagency Sustainability Working Group...

  4. Water Resources Working Group Report

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Water Resources Working Group Report This report provided content for the Wisconsin Initiative in February 2011. #12;Water Resources Working Group Wisconsin Initiative on Climate Change Impacts October 2010 #12;Water Resources Working Group Members ­ WICCI Tim Asplund (Co-Chair) - Wisconsin Department

  5. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 1997 #12;Data Management Group Annual Report 1997 A co-operative project that is jointly funded by members of the Toronto Area Transportation Planning Data Collection: (416) 978-3941 #12;Data Management Group 1997 Annual Report Table of Contents 1 INTRODUCTION

  6. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2004 City of Hamilton City of Toronto GO Transit Regional of York Toronto Transit Commission The Data Management Group is a research program located of the funding partners: Ministry of Transportation, Ontario #12;SUMMARY The Data Management Group (DMG

  7. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2000 prepared by: Data Management Group Joint Program ...........................................18 #12;i SUMMARY The Data Management Group (DMG), in cooperation with the funding agencies, has. In addition, there were 26 complex requests for data that required a customized computer program. Eight

  8. Shift-modulation invariant spaces on LCA groups

    E-Print Network [OSTI]

    Cabrelli, Carlos

    2011-01-01

    A $(K,\\Lambda)$ shift-modulation invariant space is a subspace of $L^2(G)$, that is invariant by translations along elements in $K$ and modulations by elements in $\\Lambda$. Here $G$ is a locally compact abelian group, and $K$ and $\\Lambda$ are closed subgroups of $G$ and the dual group $\\hat G$, respectively. In this article we provide a characterization of shift-modulation invariant spaces in this general context when $K$ and $\\Lambda$ are uniform lattices. This extends previous results known for $L^2(\\R^d)$. We develop fiberization techniques and suitable range functions adapted to LCA groups needed to provide the desired characterization.

  9. Summary Report of Working Group 1: Laser-Plasma Acceleration

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    by the laser recently has been demonstrated to produce intense beams of electrons at MeV-GeV energies was on control, detailed diagnostics and physics models, and technological tools to work towards the beam needed? (Joint with computational working group) In addition, techniques for controlling electron beam

  10. TEC Working Group Topic Groups Archives Training- Medical Training

    Broader source: Energy.gov [DOE]

    The TEC Training and Medical Training Issues Topic Group was formed to address the training issues for emergency responders in the event of a radioactive material transportation incident.

  11. TEC Working Group Topic Groups Archives | Department of Energy

    Office of Environmental Management (EM)

    the following links: Communicatons Consolidated Grant Topic Group Training - Medical Training Protocols Route Identificaiton Process Mechanics of Funding and Technical Assistance...

  12. TEC Working Group Topic Groups Routing | Department of Energy

    Office of Environmental Management (EM)

    group members will be to provide stakeholder perspectives and input to the Office of Logistics Management (OLM) in the Department of Energy's (DOE) Office of Civilian Radioactive...

  13. On The Harmonic Oscillator Group

    E-Print Network [OSTI]

    Raquel M. Lopez; Sergei K. Suslov; Jose M. Vega-Guzman

    2011-12-04

    We discuss the maximum kinematical invariance group of the quantum harmonic oscillator from a view point of the Ermakov-type system. A six parameter family of the square integrable oscillator wave functions, which seems cannot be obtained by the standard separation of variables, is presented as an example. The invariance group of generalized driven harmonic oscillator is shown to be isomorphic to the corresponding Schroedinger group of the free particle.

  14. Ad Hoc Curriculum Implementation Working Group Ad Hoc Working Group

    E-Print Network [OSTI]

    Brown, Sally

    Ad Hoc Curriculum Implementation Working Group MINUTES Ad Hoc Working Group 4 December 2002 Friedman on her visit next week. ONE CURRICULUM OR TWO? Information presented by Trudeau shows that PSE and other programs cannot be merged into a single curriculum. The Faculty Senate website states

  15. Acterra Group | Open Energy Information

    Open Energy Info (EERE)

    Product: Acterra Group provides consulting, project financing, services and support to energy, natural resource, and sustainability companies. Coordinates: 44.671312,...

  16. Filling factors and Braid group

    E-Print Network [OSTI]

    Wellington Cruz

    1998-02-25

    We extract the Braid group structure of a recently derived hierarchy scheme for the filling factors proposed by us which related the Hausdorff dimension, $h$, to statistics, $\

  17. Many-Group Cross-Section Adjustment Techniques for Boiling Water Reactor Adaptive Simulation

    SciTech Connect (OSTI)

    Jessee, Matthew Anderson

    2011-01-01

    Computational capability has been developed to adjust multigroup neutron cross sections, including self-shielding correction factors, to improve the fidelity of boiling water reactor (BWR) core modeling and simulation. The method involves propagating multigroup neutron cross-section uncertainties through various BWR computational models to evaluate uncertainties in key core attributes such as core k{sub eff}, nodal power distributions, thermal margins, and in-core detector readings. Uncertainty-based inverse theory methods are then employed to adjust multigroup cross sections to minimize the disagreement between BWR core modeling predictions and observed (i.e., measured) plant data. For this paper, observed plant data are virtually simulated in the form of perturbed three-dimensional nodal power distributions with the perturbations sized to represent actual discrepancies between predictions and real plant data. The major focus of this work is to efficiently propagate multigroup neutron cross-section uncertainty through BWR lattice physics and core simulator calculations. The data adjustment equations are developed using a subspace approach that exploits the ill-conditioning of the multigroup cross-section covariance matrix to minimize computation and storage burden. Tikhonov regularization is also employed to improve the conditioning of the data adjustment equations. Expressions are also provided for posterior covariance matrices of both the multigroup cross-section and core attributes uncertainties.

  18. Roadmap-Based Techniques for Modeling Group Behaviors in Multi-Agent Systems 

    E-Print Network [OSTI]

    Rodriguez, Samuel Oscar

    2012-07-16

    Simulating large numbers of agents, performing complex behaviors in realistic environments is a difficult problem with applications in robotics, computer graphics and animation. A multi-agent system can be a useful tool ...

  19. ANNUAL REPORT 1998 PHOTOVOLTAICS GROUP

    E-Print Network [OSTI]

    New South Wales, University of

    ANNUAL REPORT 1998 UNSW PHOTOVOLTAICS GROUP ANNUAL REPORT 1998 UNSW PHOTOVOLTAICS GROUP #12;THE UNIVERSITY OF NEW SOUTH WALES THE PHOTOVOLTAICS SPECIAL RESEARCH CENTRE IS A SPECIAL RESEARCH CENTRE OF THE AUSTRALIAN RESEARCH COUNCIL THE KEY CENTRE FOR PHOTOVOLTAIC ENGINEERING IS A KEY CENTRE OF THE AUSTRALIAN

  20. Neutron Scattering Group February, 2001

    E-Print Network [OSTI]

    Johnson, Peter D.

    Neutron Scattering Group February, 2001 A High Performance Instrument for the Single Crystal Igor Zaliznyak Outline #12;Neutron Scattering Group Neutron spectrometer for studies of the low-energy coherent excitations in single crystals. Common requirements for a single crystal neutron spectrometer

  1. FEATURE ARTICLES Group Decision Making

    E-Print Network [OSTI]

    FEATURE ARTICLES Group Decision Making in Honey Bee Swarms When 10,000 bees go house hunting, how a neighboring colony. A striking example of decision mak- ing by an animal group is the choice of a nesting site paper on house hunting by honey bees. Lindauer was then a postdtx:toral stu- dent at the University

  2. Top Management Group Pay Disparities and Subsequent Firm Performance: The Effect of Powerful CEOs

    E-Print Network [OSTI]

    McClelland, Patrick Lyn

    2008-05-21

    (OLS) regression and structured equation modeling (SEM) techniques. Results indicate that CEO power plays an important role in the distribution of compensation within top management groups and the extent to which pay is disparate. Further, results show...

  3. QA-Pagelet: Data Preparation Techniques for Large Scale Data Analysis of the Deep Web

    E-Print Network [OSTI]

    Liu, Ling

    1 QA-Pagelet: Data Preparation Techniques for Large Scale Data Analysis of the Deep Web James data preparation technique for large scale data analysis of the Deep Web. To support QA the Deep Web. Two unique features of the Thor framework are (1) the novel page clustering for grouping

  4. Revealing the Impact of Climate Variability on the Wind Resource Using Data Mining Techniques (Poster)

    SciTech Connect (OSTI)

    Clifton, A.; Lundquist, J.

    2011-12-01

    A data mining technique called 'k-means clustering' can be used to group winds at the NWTC into 4 major clusters. The frequency of some winds in the clusters is correlated with regional pressure gradients and climate indices. The technique could also be applied to wind resource assessment and selecting scenarios for flow modeling.

  5. Electromagnetic Interrogation Techniques Damage Detection

    E-Print Network [OSTI]

    Electromagnetic Interrogation Techniques for Damage Detection H. T. Banks #3; and M. L. Joyner Wincheski and W.P. Winfree Nasa Langley Research Center Hampton, VA #3; Plenary Lecture, Electromagnetic Nondestructive Evaluation 2001 (ENDE 2001), Kobe, Japan, May 18­19, 20001 #12; Electromagnetic Interrogation

  6. Inorganic Materials and Assembly Techniques

    E-Print Network [OSTI]

    Rogers, John A.

    a transformational set of capabilities for high performance flexible/stretchable electronics. KEYWORDS | Bio-integrated electronics; flexible electronics; inorganic materials; integrated systems; stretchable electron- icsINVITED P A P E R Inorganic Materials and Assembly Techniques for Flexible and Stretchable

  7. Federal Utility Partnership Working Group Meeting: Washington...

    Energy Savers [EERE]

    Utility Partnership Working Group Meeting: Washington Update Federal Utility Partnership Working Group Meeting: Washington Update Federal Utility Partnership Working Group Meeting:...

  8. Groups

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEniaElectricHydroLegal DocumentsGroton Deptgroups/all/feed

  9. Midwest Hydro Users Group Meeting

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Midwest Hydro Users Group will be holding their annual Fall meeting on November 12th and 13th in Wausau, Wisconsin.  An Owners-only meeting on the afternoon of the 12th followed by a full...

  10. Galois Groups of Schubert Problems 

    E-Print Network [OSTI]

    Martin Del Campo Sanchez, Abraham

    2012-10-19

    The Galois group of a Schubert problem is a subtle invariant that encodes intrinsic structure of its set of solutions. These geometric invariants are difficult to determine in general. However, based on a special position argument due to Schubert...

  11. LLNL Chemical Kinetics Modeling Group

    SciTech Connect (OSTI)

    Pitz, W J; Westbrook, C K; Mehl, M; Herbinet, O; Curran, H J; Silke, E J

    2008-09-24

    The LLNL chemical kinetics modeling group has been responsible for much progress in the development of chemical kinetic models for practical fuels. The group began its work in the early 1970s, developing chemical kinetic models for methane, ethane, ethanol and halogenated inhibitors. Most recently, it has been developing chemical kinetic models for large n-alkanes, cycloalkanes, hexenes, and large methyl esters. These component models are needed to represent gasoline, diesel, jet, and oil-sand-derived fuels.

  12. Innovative Exploration Techniques for Geothermal Assessment at...

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

    Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration...

  13. Quantum Techniques for Reaction Networks

    E-Print Network [OSTI]

    John C. Baez

    2013-06-14

    Reaction networks are a general formalism for describing collections of classical entities interacting in a random way. While reaction networks are mainly studied by chemists, they are equivalent to Petri nets, which are used for similar purposes in computer science and biology. As noted by Doi and others, techniques from quantum field theory can be adapted to apply to such systems. Here we use these techniques to study how the "master equation" describing stochastic time evolution for a reaction network reduces is related to the "rate equation" describing the deterministic evolution of the expected number of particles of each species in the large-number limit. We show that the relation is especially strong when a solution of master equation is a "coherent state", meaning that the numbers of entities of each kind are described by independent Poisson distributions.

  14. Data mining and visualization techniques

    DOE Patents [OSTI]

    Wong, Pak Chung (Richland, WA); Whitney, Paul (Richland, WA); Thomas, Jim (Richland, WA)

    2004-03-23

    Disclosed are association rule identification and visualization methods, systems, and apparatus. An association rule in data mining is an implication of the form X.fwdarw.Y where X is a set of antecedent items and Y is the consequent item. A unique visualization technique that provides multiple antecedent, consequent, confidence, and support information is disclosed to facilitate better presentation of large quantities of complex association rules.

  15. Harsh-Environment Packaging for Downhole Gas and Oil Exploration

    SciTech Connect (OSTI)

    Shubhra Bansal; Junghyun Cho; Kevin Durocher; Chris Kapusta; Aaron Knobloch; David Shaddock; Harry Schoeller; Hua Xia

    2007-08-31

    This research into new packaging materials and methods for elevated temperatures and harsh environment electronics focused on gaining a basic understanding of current state-of-the-art in electronics packaging used in industry today, formulating the thermal-mechanical models of the material interactions and developing test structures to confirm these models. Discussions were initiated with the major General Electric (GE) businesses that currently sell into markets requiring high temperature electronics and packaging. They related the major modes of failure they encounter routinely and the hurdles needed to be overcome in order to improve the temperature specifications of these products. We consulted with our GE business partners about the reliability specifications and investigated specifications and guidelines that from IPC and the SAE body that is currently developing guidelines for electronics package reliability. Following this, a risk analysis was conducted for the program to identify the critical risks which need to be mitigated in order to demonstrate a flex-based packaging approach under these conditions. This process identified metal/polyimide adhesion, via reliability for flex substrates and high temperature interconnect as important technical areas for reliability improvement.

  16. Downhole steam generator with improved preheating, combustion and protection features

    DOE Patents [OSTI]

    Fox, Ronald L. (Albuquerque, NM)

    1983-01-01

    An apparatus for generation of steam in a borehole for penetration into an earth formation wherein feedback preheater means are provided for the fuel and water before entering the combustor assembly. First, combustion gases are conducted from the combustion chamber to locations in proximity to the water and fuel supplies. Secondly, both hot combustion gases and steam are conducted from the borehole back to the water and fuel supply. The water used for conversion to steam is passed in a countercurrent manner through a plurality of annular water flow channels surrounding the combustion chamber. In this manner, the water is preheated, and the combustion chamber is cooled simultaneously, thereby minimizing thermal stresses and deterioration of the walls of the combustion chamber. The water is injected through slotted inlets along the combustion chamber wall to provide an unstable boundary layer and stripping of the water from the wall for efficient steam generation. Pressure responsive doors are provided at the steam outlet of the combustor assembly. The outlet doors and fluid flow functions may be controlled by a diagnostic/control module. The module is positioned in the water flow channel to maintain a relatively constant, controlled temperature.

  17. Geothermal pump down-hole energy regeneration system

    DOE Patents [OSTI]

    Matthews, Hugh B. (Boylston, MA)

    1982-01-01

    Geothermal deep well energy extraction apparatus is provided of the general kind in which solute-bearing hot water is pumped to the earth's surface from a subterranean location by utilizing thermal energy extracted from the hot water for operating a turbine motor for driving an electrical power generator at the earth 3 s surface, the solute bearing water being returned into the earth by a reinjection well. Efficiency of operation of the total system is increased by an arrangement of coaxial conduits for greatly reducing the flow of heat from the rising brine into the rising exhaust of the down-well turbine motor.

  18. Downhole burner systems and methods for heating subsurface formations

    DOE Patents [OSTI]

    Farmayan, Walter Farman (Houston, TX); Giles, Steven Paul (Damon, TX); Brignac, Jr., Joseph Phillip (Katy, TX); Munshi, Abdul Wahid (Houston, TX); Abbasi, Faraz (Sugarland, TX); Clomburg, Lloyd Anthony (Houston, TX); Anderson, Karl Gregory (Missouri City, TX); Tsai, Kuochen (Katy, TX); Siddoway, Mark Alan (Katy, TX)

    2011-05-31

    A gas burner assembly for heating a subsurface formation includes an oxidant conduit, a fuel conduit, and a plurality of oxidizers coupled to the oxidant conduit. At least one of the oxidizers includes a mix chamber for mixing fuel from the fuel conduit with oxidant from the oxidant conduit, an igniter, and a shield. The shield includes a plurality of openings in communication with the oxidant conduit. At least one flame stabilizer is coupled to the shield.

  19. Diagnosis of Acid Placement from Downhole Temperature Measurements 

    E-Print Network [OSTI]

    Tan, Xuehao

    2012-10-19

    average area B(Vi) function of interstitial velocity 0 HClC concentration of HCl Cn covariance matrix Cpf heat capacity of the wellbore fluid Cps heat capacity of acid solution CpR heat capacity of rock c(t) time-dependent function... for estimating injection temperature D depth D(t) time function in the wormhole model Dtotal total depth of the wellbore section d observed data vector e residual vector ek specific kinetic energy ep specific potential energy eR specific...

  20. Methods of performing downhole operations using orbital vibrator energy sources

    DOE Patents [OSTI]

    Cole, Jack H.; Weinberg, David M.; Wilson, Dennis R.

    2004-02-17

    Methods of performing down hole operations in a wellbore. A vibrational source is positioned within a tubular member such that an annulus is formed between the vibrational source and an interior surface of the tubular member. A fluid medium, such as high bulk modulus drilling mud, is disposed within the annulus. The vibrational source forms a fluid coupling with the tubular member through the fluid medium to transfer vibrational energy to the tubular member. The vibrational energy may be used, for example, to free a stuck tubular, consolidate a cement slurry and/or detect voids within a cement slurry prior to the curing thereof.

  1. Downhole steam generator using low pressure fuel and air supply

    DOE Patents [OSTI]

    Fox, Ronald L. (Albuquerque, NM)

    1983-01-01

    An apparatus for generation of steam in a borehole for penetration into an earth formation wherein a spiral, tubular heat exchanger is used in the combustion chamber to isolate the combustion process from the water being superheated for conversion into steam. The isolation allows combustion of a relatively low pressure oxidant and fuel mixture for generating high enthalpy steam. The fuel is preheated by feedback of combustion gases from the top of the combustion chamber through a fuel preheater chamber. The hot exhaust gases of combustion at the bottom of the combustion chamber, after flowing over the heat exchanger enter an exhaust passage and pipe. The exhaust pipe is mounted inside the water supply line heating the water flowing into the heat exchanger. After being superheated in the heat exchanger, the water is ejected through an expansion nozzle and converts into steam prior to penetration into the earth formation. Pressure responsive doors are provided at a steam outlet downstream of the nozzle and close when the steam pressure is lost due to flameout.

  2. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2005-05-08

    The wireless gauge has not been modified or upgraded during this report period. Tubel Tech is working with the DoE Rocky Mountain test center to create a CRADA to allow Tubel Tech to test its tool in a well at the test center.

  3. DOWNHOLE POWER GENERATION AND WIRELESS COMMUNICATIONS FOR INTELLIGENT COMPLETIONS APPLICATIONS

    SciTech Connect (OSTI)

    Paul Tubel

    2005-05-08

    The development work during this quarter was focused in the test of the wireless gauge in a well. The tool was sent to Halliburton for a test. The company indicated that the test well was not available for 4 months and the company was not able to schedule a test of the wireless gauge in its test well. The tool was returned to Tubel Tech's facility in The Woodlands. Tubel Tech is looking for a new test well to deploy the wireless gauge to complete the requirements for the DOE.

  4. Downhole Power Generation and Wireless Communications for Intelligent Completions Applications

    SciTech Connect (OSTI)

    Paul Tubel

    2005-11-07

    Tubel Tech has been working with the DoE Rocky Mountain test center to create a CRADA which will allow Tubel Tech to test its wireless gauge in a well at the test center. The CRADA agreement should be completed by the next quarter and Tubel Tech expects to perform the final test on this project during the next quarter as well. The wireless gauge has not been modified or upgraded during this report period.

  5. Downhole Sensor Holds Transformative Potential | Department of Energy

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

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electricLaboratoryofNotices | Department of EnergyDougBuildings |term

  6. Self-Consuming Downhole Packer | 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 on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4 » Searchwith Firstat the High Temperature10 March

  7. SECURITY TECHNIQUES Chris J Mitchell1

    E-Print Network [OSTI]

    Mitchell, Chris

    SECURITY TECHNIQUES Chris J Mitchell1 Introduction In this paper we consider the range of security security has been exerted. However, the techniques described are of general applicability by a security technique; in doing so we will distinguish between security features and security techniques (or

  8. Galaxy Groups at Intermediate Redshift

    E-Print Network [OSTI]

    R. G. Carlberg; H. K. C. Yee; S. L. Morris; H. Lin; P. B. Hall; D. R. Patton; M. Sawicki; C. W. Shepherd

    2000-08-14

    Galaxy groups likely to be virialized are identified within the CNOC2 intermediate redshift galaxy survey using an iterative method. The number-velocity dispersion relation is in agreement with the low-mass extrapolation of the cluster normalized Press-Schechter function. The two-point group-group correlation function has r_0=6.8+/- 0.3 Mpc, which is larger than the correlations of individual galaxies at the level predicted from n-body calibrated halo clustering. The groups are stacked in velocity and position to create a sample large enough for measurement of a density and velocity dispersion profile. The stacked mean galaxy density profile falls nearly as a power law with r^{-2.5} and has no well-defined core. The projected velocity dispersion is examined for a variety of samples with different methods and found to be either flat or slowly rising outwards. The combination of a steeper-than-isothermal density profile and the outward rising velocity dispersion implies that the mass-to-light ratio of groups rises with radius. The M/L can be kept nearly constant if the galaxy orbits are nearly circular, although such strong tangential anisotropy is not supported by other evidence. The segregation of mass and light is not dependent on galaxy luminosity but is far more prominent in the red galaxies than the blue. The M/L gradient could arise from orbital ``sloshing'' of the galaxies in the group halos, dynamical friction acting on the galaxies in a background of ``classical'' collisionless dark matter, or, more speculatively, the dark matter may have a true core.

  9. A Study of the forced Van der Pol generalized oscillator with renormalization group method

    E-Print Network [OSTI]

    L. A. Hinvi; A. V. Monwanou; J. B. Chabi Orou

    2013-11-04

    In this paper the equation of forced Van der Pol generalized oscillator is examined with renormalization group method. A brief recall of the renormalization group technique is done. We have applied this method to the equation of forced Van der Pol generalized oscillator to search for its asymptotic solution and its renormalization group equation. The analysis of the numerical simulation graph is done; the method's efficiency is pointed out.

  10. Group theoretical methods in physics

    SciTech Connect (OSTI)

    Zachary, W.W.

    1984-01-01

    This book presents the papers given at a colloquium on group theory. Topics considered at the colloquium included supersymmetric Yang-Mills fields and relations with other nonlinear systems, quantum chaos, a Lie-transformed action principle for classical plasma dynamics, an obstacle to predictability, perturbation theory, simple Lie groups, coherent states, scattering and band structure problems, scattering amplitudes, bosons, charge density wave superconductors, harmonic analysis of boson algebras, the gauge principle, the equivalence principle, supergravity, quantum field theory, quantum gravity, and the Cauchy problem.

  11. Tonon Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeterInformation PolicyTinna Group JumpTombigbeeTonon Group Jump to:

  12. Repositioning of Covered Stents: The Grip Technique

    SciTech Connect (OSTI)

    Kirby, John Martin; Guo Xiaofeng; Midia, Mehran

    2011-06-15

    Introduction: Retrieval and repositioning of a stent deployed beyond its intended target region may be a difficult technical challenge. Materials and Methods: A balloon-mounted snare technique, a variant of the coaxial loop snare technique, is described. Results: The technique is described for the repositioning of a covered transjugular intrahepatic portosystemic shunt stent and a covered biliary stent. Conclusion: The balloon-mounted snare technique is a useful technique for retrieval of migrated stents.

  13. Techniques for Automated Performance Analysis

    SciTech Connect (OSTI)

    Marcus, Ryan C.

    2014-09-02

    The performance of a particular HPC code depends on a multitude of variables, including compiler selection, optimization flags, OpenMP pool size, file system load, memory usage, MPI configuration, etc. As a result of this complexity, current predictive models have limited applicability, especially at scale. We present a formulation of scientific codes, nodes, and clusters that reduces complex performance analysis to well-known mathematical techniques. Building accurate predictive models and enhancing our understanding of scientific codes at scale is an important step towards exascale computing.

  14. Geochemical Techniques | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable UrbanKentucky: EnergyGateway EditOpenTechniques Jump to: navigation,

  15. Seismic Techniques | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS Report UrlNM-bRenewableSMUDSectional Model FlumeSeeoTechniques Jump

  16. Geophysical Techniques | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePowerEdistoWhiskeyFootprintGEXAGeminiEnergyHawaii |Methods JumpTechniques Jump

  17. CEMENT RELATED RESEARCH HYDROGEOCHEMISTRY GROUP

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    CEMENT RELATED RESEARCH HYDROGEOCHEMISTRY GROUP Josep M. Soler Jordi Cama Carles Ayora Ana Trapote.soler@idaea.csic.es #12;NOMECLATURE cement + water = hardened cement paste cement + water + sand = mortar cement + waterC) clinker + gypsum portland cement PORTLAND CEMENT #12;GTS-HPF Core Infiltration Experiment Experimental

  18. Finite groups and quantum physics

    SciTech Connect (OSTI)

    Kornyak, V. V.

    2013-02-15

    Concepts of quantum theory are considered from the constructive 'finite' point of view. The introduction of a continuum or other actual infinities in physics destroys constructiveness without any need for them in describing empirical observations. It is shown that quantum behavior is a natural consequence of symmetries of dynamical systems. The underlying reason is that it is impossible in principle to trace the identity of indistinguishable objects in their evolution-only information about invariant statements and values concerning such objects is available. General mathematical arguments indicate that any quantum dynamics is reducible to a sequence of permutations. Quantum phenomena, such as interference, arise in invariant subspaces of permutation representations of the symmetry group of a dynamical system. Observable quantities can be expressed in terms of permutation invariants. It is shown that nonconstructive number systems, such as complex numbers, are not needed for describing quantum phenomena. It is sufficient to employ cyclotomic numbers-a minimal extension of natural numbers that is appropriate for quantum mechanics. The use of finite groups in physics, which underlies the present approach, has an additional motivation. Numerous experiments and observations in the particle physics suggest the importance of finite groups of relatively small orders in some fundamental processes. The origin of these groups is unclear within the currently accepted theories-in particular, within the Standard Model.

  19. CHERN APPROXIMATIONS FOR GENERALISED GROUP ...

    E-Print Network [OSTI]

    ... to* * E0BG that can be built using knowledge of the complex representations of G. We give a ... At present * *we know very little about how to interpret transfers in terms of formal groups, ... 1991 Mathematics Subject Classification. ...... so fi* **ck

  20. Policy Groups Winfried E. Kuhnhauser

    E-Print Network [OSTI]

    Kühnhauser, Winfried

    1 Policy Groups Winfried E. Kuhnhauser GMD National Research Center For Information Technology D: Systems that support a multitude of independent security domains in which an individual security policy domains consti- tutes a major problem. While security policies are capable of controlling the applications

  1. Task Group 9 Update (Presentation)

    SciTech Connect (OSTI)

    Bosco, N.

    2014-04-01

    This presentation is a brief update of IEC TC82 QA Task Force, Group 9. Presented is an outline of the recently submitted New Work Item Proposal (NWIP) for a Comparative Thermal Cycling Test for CPV Modules to Differentiate Thermal Fatigue Durability.

  2. Group Motion Editing Taesoo Kwon

    E-Print Network [OSTI]

    Takahashi, Shigeo

    : I.3.7 [Three-Dimensional Graphics and Realism]: Animation--Virtual reality Keywords: Group Motion Editing, Crowd Simulation, Human Motion, Character Animation 1 Introduction Crowd scenes appear frequently in crowd animation make it possible to synthesize convincing animations of virtual crowds by simulating

  3. Compensation Techniques in Accelerator Physics

    SciTech Connect (OSTI)

    Hisham Kamal Sayed

    2011-05-31

    Accelerator physics is one of the most diverse multidisciplinary fields of physics, wherein the dynamics of particle beams is studied. It takes more than the understanding of basic electromagnetic interactions to be able to predict the beam dynamics, and to be able to develop new techniques to produce, maintain, and deliver high quality beams for different applications. In this work, some basic theory regarding particle beam dynamics in accelerators will be presented. This basic theory, along with applying state of the art techniques in beam dynamics will be used in this dissertation to study and solve accelerator physics problems. Two problems involving compensation are studied in the context of the MEIC (Medium Energy Electron Ion Collider) project at Jefferson Laboratory. Several chromaticity (the energy dependence of the particle tune) compensation methods are evaluated numerically and deployed in a figure eight ring designed for the electrons in the collider. Furthermore, transverse coupling optics have been developed to compensate the coupling introduced by the spin rotators in the MEIC electron ring design.

  4. Magnetic Techniques | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to: navigation, search Name:Power Electronics Group Jump to:

  5. UCLA Particle Physics Research Group annual progress report

    SciTech Connect (OSTI)

    Nefkens, B.M.K.

    1983-11-01

    The objectives, basic research programs, recent results, and continuing activities of the UCLA Particle Physics Research Group are presented. The objectives of the research are to discover, to formulate, and to elucidate the physics laws that govern the elementary constituents of matter and to determine basic properties of particles. The research carried out by the Group last year may be divided into three separate programs: (1) baryon spectroscopy, (2) investigations of charge symmetry and isospin invariance, and (3) tests of time reversal invariance. The main body of this report is the account of the techniques used in our investigations, the results obtained, and the plans for continuing and new research. An update of the group bibliography is given at the end.

  6. Subranging technique using superconducting technology

    DOE Patents [OSTI]

    Gupta, Deepnarayan (Hawthorne, NY)

    2003-01-01

    Subranging techniques using "digital SQUIDs" are used to design systems with large dynamic range, high resolution and large bandwidth. Analog-to-digital converters (ADCs) embodying the invention include a first SQUID based "coarse" resolution circuit and a second SQUID based "fine" resolution circuit to convert an analog input signal into "coarse" and "fine" digital signals for subsequent processing. In one embodiment, an ADC includes circuitry for supplying an analog input signal to an input coil having at least a first inductive section and a second inductive section. A first superconducting quantum interference device (SQUID) is coupled to the first inductive section and a second SQUID is coupled to the second inductive section. The first SQUID is designed to produce "coarse" (large amplitude, low resolution) output signals and the second SQUID is designed to produce "fine" (low amplitude, high resolution) output signals in response to the analog input signals.

  7. Schrödinger group and quantum finance

    E-Print Network [OSTI]

    Juan M. Romero; Ulises Lavana; Elio Martínez

    2013-04-18

    Using the one dimensional free particle symmetries, the quantum finance symmetries are obtained. Namely, it is shown that Black-Scholes equation is invariant under Schr\\"odinger group. In order to do this, the one dimensional free non-relativistic particle and its symmetries are revisited. To get the Black-Scholes equation symmetries, the particle mass is identified as the inverse of square of the volatility. Furthermore, using financial variables, a Schr\\"odinger algebra representation is constructed.

  8. Sinocome Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-Enhancing Capacity forSilicium de Provence SASSinem GeothermalGroup Jump to:

  9. Ralos Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page onRAPID/Geothermal/Exploration/Colorado <RAPID/Geothermal/WaterEnergy Marketing Corp Jump to:RajasthanHills,Ralos Group

  10. PROGRAMME GROUP RESEARCH UPDATE: Biodiversity indicators &

    E-Print Network [OSTI]

    operations and impacts, tree species type and site quality, observation and evidence of forest biological1 PROGRAMME GROUP RESEARCH UPDATE: Biodiversity indicators & knowledge management programme group Introduction Duncan Ray The programme group Biodiversity Indicators and Knowledge Management (BIKM

  11. The World Bank Group Energy Strategy

    E-Print Network [OSTI]

    Kammen, Daniel M.

    The World Bank Group Energy Strategy Approach Paper Sustainable Development Network October 2009...............................................................................................................................................iii World Bank Group Energy Strategy Approach Paper...............................................................................................................3 World Bank Group Energy Sector Strategy and Performance in Recent Years

  12. Hanergy Holdings Group Company Ltd formerly Farsighted Group aka Huarui

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA JumpDuimen River Power Co LtdGuntherGreens LaserGroup | Open Energy

  13. TEC Working Group Topic Groups Tribal Meeting Summaries | Department of

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLEStatutory Authority SustainXSystem for39:TEC Working Group

  14. TEC Working Group Topic Groups | Department of Energy

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLEStatutory Authority SustainXSystem for39:TEC Working GroupTopic

  15. Techniques for Foundry Identification James B. Wendt

    E-Print Network [OSTI]

    Techniques for Foundry Identification James B. Wendt Computer Science Department, University of California, Los Angeles miodrag@cs.ucla.edu ABSTRACT Foundry identification is essential for many tasks introduce statistical techniques for foundry detection, specifically for identifying from which foundry

  16. Modeling techniques for simulating well behavior 

    E-Print Network [OSTI]

    Rattu, Bungen Christina

    2002-01-01

    This thesis is a catalog of modeling techniques useful in simulating well behavior in certain types of reservoirs that are often encountered in petroleum reservoirs. Emphasis has been placed on techniques that can be used with any conventional...

  17. EERE's Usability and Analysis Techniques Guidebook

    Office of Energy Efficiency and Renewable Energy (EERE)

    For more information on the usability techniques associated with the templates, see EERE's Usability and Analysis Techniques Guidebook, which is a collection of best practices for creating and running different kinds of user-centered design projects.

  18. NEC Corporation Volkswagen Group of America

    E-Print Network [OSTI]

    FELLOWS Cisco Intel NEC Corporation Volkswagen Group of America RESEARCH CONTRACTS AND SPECIAL Univision Viacom Volkswagen Group of America, Inc. VSP Global Welspun ENDOWMENT AND NAMING GRANTS Asahi

  19. TEC/WG Tribal Topic Group

    Office of Environmental Management (EM)

    Meeting September 22, 2005 - Pueblo, CO Group Chair: Jay Jones (DOEOCRWM) Tribal Topic Group Members Present: Richard Arnold (Southern PaiuteCGTO), Vicki Best (Bechtel SAIC-YMP),...

  20. Federal Utility Partnership Working Group Meeting: Washington...

    Energy Savers [EERE]

    Federal Utility Partnership Working Group Meeting: Washington Update Federal Utility Partnership Working Group Meeting: Washington Update Presentation-given at the Fall 2012...

  1. Sampling Techniques for Probabilistic Roadmap Planners

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Sampling Techniques for Probabilistic Roadmap Planners Roland Geraerts Mark H. Overmars institute;Sampling Techniques for Probabilistic Roadmap Planners Roland Geraerts Mark H. Overmars Institute,markov}@cs.uu.nl. Abstract The probabilistic roadmap approach is a commonly used motion planning technique. A crucial

  2. Sampling Techniques for Probabilistic Roadmap Planners

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Sampling Techniques for Probabilistic Roadmap Planners Roland Geraerts Mark H. Overmars institute; Sampling Techniques for Probabilistic Roadmap Planners Roland Geraerts Mark H. Overmars Institute,markov}@cs.uu.nl. Abstract The probabilistic roadmap approach is a commonly used motion planning technique. A crucial

  3. GEA Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable Urban TransportFortistarFuelCellsEtcSilicon Co Ltd JumpCaldemonGroup Jump

  4. Enovos Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, AlabamaETEC GmbH JumpEllenville, NewLtdEnergypedia JumpEnhancedEnnovateEnovos Group

  5. Electrocell Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:of theClimate Finance ReadinessNo4 PinalElectrocell Group

  6. Ensus Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEnia SpA Jump to: navigation, search Name:Ensus Group Jump

  7. Bumlai Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLC JumpBiossenceBrunswick, Maine: EnergyGHGsBuildingsBumlai Group

  8. MLS Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavyAgency (IRENA) JumpLiterature Review HomeM-7MHK LCOEMLS Group

  9. Ramky Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg,Energy LLCALLETEREFU Elektronik GmbHRahusRamky Group Jump to:

  10. Humus Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA JumpDuimen RiverScoring Tool JumpHuaningXinda BioPowerHumus Group

  11. Jinglong Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EAInvervar Hydro Jump to:HuilunWater ElectricityJinglong Group Jump to:

  12. Klebl Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EAInvervar Hydro JumpHuariKeewatinKenya:Electric Coop,Klebl Group Jump

  13. Schulthess Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg,EnergyEastCarbonOpenSchulthess Group Jump to: navigation,

  14. Sunvim Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeter BatterySolarfinMarketMember CorpSunvie SAS Jump to: navigation,Group

  15. Swatch Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeter BatterySolarfinMarketMember CorpSunviePtySwatch Group Jump to:

  16. Tinna Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeterInformation PolicyTinna Group Jump to: navigation, search Name:

  17. Tongwei Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeterInformation PolicyTinna Group JumpTombigbee

  18. USJ Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company) Jump to:TucsonLLCAdministrationUSIMAT Jump to:USJ Group

  19. Vandana Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowa (Utility Company) JumpGTZUtility Rates APIVandana Group Jump to:

  20. Angeleno Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminex A S Jump to: navigation,InofMill,AndroscogginAngeleno Group

  1. Airvoice Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand DaltonSolarOpen Energy Information Geothermal AreaAireGroup Jump

  2. Aksa Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand DaltonSolarOpen EnergyFebruary 2009 | OpenAkiachak,Aksa Group Jump to:

  3. Camco Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank, Maine:Kansas:Information(RedirectedEnterprise Jump to:Wisconsin:Group

  4. Emte Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePowerEdisto Electric Coop, Inc JumpElko, Nevada:Geothermal Power LLC JumpGroup

  5. Lucas Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource HistoryScenarios Towards 2050 Jump to: navigation, search ToolWellsLowryOhio:Group

  6. Copisa Group | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower Ventures JumpCommercialRenewableGlobal L P JumpFarmCopisa Group Jump to:

  7. The Yi Liu Group - Home

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With U.S.Week DayDr. Jeffrey publication of the Group Members News

  8. Jay Srinivasan! NERSC Systems Group!

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACT EVALUATIONIntroducing theActivationDept ofNERSC Systems Group! ! NUG

  9. Mixed Waste Working Group report

    SciTech Connect (OSTI)

    Not Available

    1993-11-09

    The treatment of mixed waste remains one of this country`s most vexing environmental problems. Mixed waste is the combination of radioactive waste and hazardous waste, as defined by the Resource Conservation and Recovery Act (RCRA). The Department of Energy (DOE), as the country`s largest mixed waste generator, responsible for 95 percent of the Nation`s mixed waste volume, is now required to address a strict set of milestones under the Federal Facility Compliance Act of 1992. DOE`s earlier failure to adequately address the storage and treatment issues associated with mixed waste has led to a significant backlog of temporarily stored waste, significant quantities of buried waste, limited permanent disposal options, and inadequate treatment solutions. Between May and November of 1993, the Mixed Waste Working Group brought together stakeholders from around the Nation. Scientists, citizens, entrepreneurs, and bureaucrats convened in a series of forums to chart a course for accelerated testing of innovative mixed waste technologies. For the first time, a wide range of stakeholders were asked to examine new technologies that, if given the chance to be tested and evaluated, offer the prospect for better, safer, cheaper, and faster solutions to the mixed waste problem. In a matter of months, the Working Group has managed to bridge a gap between science and perception, engineer and citizen, and has developed a shared program for testing new technologies.

  10. Efficiency Limitations for -Protocols for Group Homomorphisms

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Efficiency Limitations for -Protocols for Group Homomorphisms (Full Version) Endre Bangerter1 , Jan stephan.krenn@bfh.ch Abstract. Efficient zero-knowledge proofs of knowledge for group ho- momorphisms be performed very efficiently within groups of known order, for hidden order groups the respective proofs

  11. Group Study Room Policy and Reservation Form

    E-Print Network [OSTI]

    Reynolds, Albert C.

    a maximum of eight (8) members. · The Group Study Room is not intended for use by scheduled classes. GroupGroup Study Room Policy and Reservation Form Please read the entire policy document below before going to the link at the end to make your reservation for the Group Study Room. Overview Mc

  12. Exascale Hardware Architectures Working Group

    SciTech Connect (OSTI)

    Hemmert, S; Ang, J; Chiang, P; Carnes, B; Doerfler, D; Leininger, M; Dosanjh, S; Fields, P; Koch, K; Laros, J; Noe, J; Quinn, T; Torrellas, J; Vetter, J; Wampler, C; White, A

    2011-03-15

    The ASC Exascale Hardware Architecture working group is challenged to provide input on the following areas impacting the future use and usability of potential exascale computer systems: processor, memory, and interconnect architectures, as well as the power and resilience of these systems. Going forward, there are many challenging issues that will need to be addressed. First, power constraints in processor technologies will lead to steady increases in parallelism within a socket. Additionally, all cores may not be fully independent nor fully general purpose. Second, there is a clear trend toward less balanced machines, in terms of compute capability compared to memory and interconnect performance. In order to mitigate the memory issues, memory technologies will introduce 3D stacking, eventually moving on-socket and likely on-die, providing greatly increased bandwidth but unfortunately also likely providing smaller memory capacity per core. Off-socket memory, possibly in the form of non-volatile memory, will create a complex memory hierarchy. Third, communication energy will dominate the energy required to compute, such that interconnect power and bandwidth will have a significant impact. All of the above changes are driven by the need for greatly increased energy efficiency, as current technology will prove unsuitable for exascale, due to unsustainable power requirements of such a system. These changes will have the most significant impact on programming models and algorithms, but they will be felt across all layers of the machine. There is clear need to engage all ASC working groups in planning for how to deal with technological changes of this magnitude. The primary function of the Hardware Architecture Working Group is to facilitate codesign with hardware vendors to ensure future exascale platforms are capable of efficiently supporting the ASC applications, which in turn need to meet the mission needs of the NNSA Stockpile Stewardship Program. This issue is relatively immediate, as there is only a small window of opportunity to influence hardware design for 2018 machines. Given the short timeline a firm co-design methodology with vendors is of prime importance.

  13. Renormalization group aspects of graphene

    E-Print Network [OSTI]

    Maria A. H. Vozmediano

    2010-10-25

    Graphene is a two dimensional crystal of carbon atoms with fascinating electronic and morphological properties. The low energy excitations of the neutral, clean system are described by a massless Dirac Hamiltonian in (2+1) dimensions which also captures the main electronic and transport properties. A renormalization group analysis sheds light on the success of the free model: due to the special form of the Fermi surface which reduces to two single points in momentum space, short range interactions are irrelevant and only gauge interactions like long range Coulomb or effective disorder can play a role in the low energy physics. We review these features and discuss briefly other aspects related to disorder and to the bilayer material along the same lines.

  14. Empirical comparison of network sampling techniques

    E-Print Network [OSTI]

    Blagus, Neli; Bahec, Marko

    2015-01-01

    In the past few years, the storage and analysis of large-scale and fast evolving networks present a great challenge. Therefore, a number of different techniques have been proposed for sampling large networks. In general, network exploration techniques approximate the original networks more accurately than random node and link selection. Yet, link selection with additional subgraph induction step outperforms most other techniques. In this paper, we apply subgraph induction also to random walk and forest-fire sampling. We analyze different real-world networks and the changes of their properties introduced by sampling. We compare several sampling techniques based on the match between the original networks and their sampled variants. The results reveal that the techniques with subgraph induction underestimate the degree and clustering distribution, while overestimate average degree and density of the original networks. Techniques without subgraph induction step exhibit exactly the opposite behavior. Hence, the pe...

  15. A nuclear magnetic resonance probe of group IV clathrates 

    E-Print Network [OSTI]

    Gou, Weiping

    2008-10-10

    (NMR) technique. NMR is a local probe, which can tell us local electronic and magnetic information. The long coherence times allow NMR to be used to study relatively low-frequency atomic dynamics. 13 CHAPTER II INTRODUCTION TO SOLID STATE NMR Nuclear... University, China; M.S., Academy of Science of China; M.S., Texas A&M University Chair of Advisory Committee: Dr. Joseph H. Ross, Jr. The clathrates feature large cages of silicon, germanium, or tin, with guest atoms in the cage centers. The group IV...

  16. Promising technique improves hydrogen production of affordable...

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

    (Materialscientist, Wikipedia) (click image to enlarge) Promising technique improves hydrogen production of affordable alternative to platinum By Angela Hardin * October 26, 2015...

  17. Tomographic inversion techniques incorporating physical constraints...

    Office of Scientific and Technical Information (OSTI)

    spatial coverage of the plasma cross-section, standard inversion techniques utilizing matrix inversion and linear-regularization often cannot produce unique and physically...

  18. Eddy current technique for predicting burst pressure

    DOE Patents [OSTI]

    Petri, Mark C. (Yorkville, IL); Kupperman, David S. (Oak Park, IL); Morman, James A. (Woodridge, IL); Reifman, Jaques (Western Springs, IL); Wei, Thomas Y. C. (Downers Grove, IL)

    2003-01-01

    A signal processing technique which correlates eddy current inspection data from a tube having a critical tubing defect with a range of predicted burst pressures for the tube is provided. The method can directly correlate the raw eddy current inspection data representing the critical tubing defect with the range of burst pressures using a regression technique, preferably an artificial neural network. Alternatively, the technique deconvolves the raw eddy current inspection data into a set of undistorted signals, each of which represents a separate defect of the tube. The undistorted defect signal which represents the critical tubing defect is related to a range of burst pressures utilizing a regression technique.

  19. Methods for improved growth of group III nitride buffer layers

    DOE Patents [OSTI]

    Melnik, Yurity; Chen, Lu; Kojiri, Hidehiro

    2014-07-15

    Methods are disclosed for growing high crystal quality group III-nitride epitaxial layers with advanced multiple buffer layer techniques. In an embodiment, a method includes forming group III-nitride buffer layers that contain aluminum on suitable substrate in a processing chamber of a hydride vapor phase epitaxy processing system. A hydrogen halide or halogen gas is flowing into the growth zone during deposition of buffer layers to suppress homogeneous particle formation. Some combinations of low temperature buffers that contain aluminum (e.g., AlN, AlGaN) and high temperature buffers that contain aluminum (e.g., AlN, AlGaN) may be used to improve crystal quality and morphology of subsequently grown group III-nitride epitaxial layers. The buffer may be deposited on the substrate, or on the surface of another buffer. The additional buffer layers may be added as interlayers in group III-nitride layers (e.g., GaN, AlGaN, AlN).

  20. A group-embeddable non-automatic semigroup whose universal group is automatic

    E-Print Network [OSTI]

    St Andrews, University of

    A group-embeddable non-automatic semigroup whose universal group is automatic Alan J. Cain School in a group and S is not automatic, but the universal group of S is automatic. 2000 Mathematics Subject Classification: , . The concept of an automatic structure has been generalized from groups [ECH+] to semigroups

  1. Preferences, Information, and Group Decision Making 

    E-Print Network [OSTI]

    Espinoza, Alejandro

    2009-05-15

    This study will examine how the structure of preferences of group members in a decision-making group, as well as the information they have, affects the collection and the processing of information by individual members of ...

  2. CHARTER OF THE TRITIUM FOCUS GROUP (TFG)

    Office of Environmental Management (EM)

    OF THE TRITIUM FOCUS GROUP (TFG) APRIL 2013 PURPOSE - The purpose of the TFG, a Standing DOE Working Group, is to promote cost-effective improvements in tritium safety,...

  3. FUNDAMENTAL GROUPS AND COVERING SPACES ETHAN JERZAK

    E-Print Network [OSTI]

    May, J. Peter

    FUNDAMENTAL GROUPS AND COVERING SPACES ETHAN JERZAK Abstract. In this paper, I will briefly develop) Date: August 22, 2008. 1 #12;2 ETHAN JERZAK the structure of a group; the constant loop is the identity

  4. LANDAU'S NECESSARY DENSITY CONDITIONS FOR LCA GROUPS

    E-Print Network [OSTI]

    Kutyniok, Gitta

    LANDAU'S NECESSARY DENSITY CONDITIONS FOR LCA GROUPS KARLHEINZ GR¨OCHENIG, GITTA KUTYNIOK's conditions to the setting of locally compact abelian (LCA) groups, relying in an analogous way on the basics

  5. Jefferson Lab - Detector Support Group (DSG) Staff

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

    Halls Hall A Hall B Hall C Hall D Additional Links Info Jefferson Lab Home Page Detector Support Group (DSG) Home The Detector Support Group (DSG) under the direction of Dr....

  6. COMPLETE POSITIVE GROUP PRESENTATIONS PATRICK DEHORNOY

    E-Print Network [OSTI]

    Dehornoy, Patrick

    COMPLETE POSITIVE GROUP PRESENTATIONS PATRICK DEHORNOY Abstract. A combinatorial property of positive group presentations, called completeness, is introduced, with an effective criterion for recognizing complete presentations, and an iterative method for completing an incomplete presenta- tion. We

  7. GROUP SPARSITY VIA LINEAR-TIME PROJECTION

    E-Print Network [OSTI]

    2008-08-01

    Jul 31, 2008 ... linear-time algorithm for Euclidean projection onto the l1- and group l1-norm ..... of 128 entries and eight non-zero groups, and additive noise si ...

  8. The process of resocialization within group sessions 

    E-Print Network [OSTI]

    Settles, Lincoln Jay

    2000-01-01

    This thesis examines current resocialization strategies within a juvenile justice facility in Texas. The focus is on intervention groups and the conversations within these groups. Data was collected on several different ...

  9. Nick Wright Named Advanced Technologies Group Lead

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

    National Laboratory's Future Technologies Group (FTG) to assess emerging technologies in architecture, algorithms, parallel programming paradigms and languages. "Computing...

  10. Integral of Map into Abelian $?$-group

    E-Print Network [OSTI]

    Aleks Kleyn

    2014-03-12

    The common in ring, module and algebra is that they are Abelian group with respect to addition. This property is enough to study integration. I treat integral of measurable map into normed Abelian $\\Omega$-group. Theory of integration of maps into $\\Omega$-group has a lot of common with theory of integration of functions of real variable. However I had to change some statements, since they implicitly assume either compactness of range or total order in $\\Omega$-group.

  11. Catalysis Working Group Meeting: January 2015

    Broader source: Energy.gov [DOE]

    Agenda and presentations from the Catalysis Working Group meeting held January 21, 2015, in Los Alamos, New Mexico.

  12. Distributed Systems Group Membership and View

    E-Print Network [OSTI]

    Guerraoui, Rachid

    Synchrony (vs). Uses: GroupMembership (gmp). TerminatingReliableBroadcast(trb). BestEffortBroadcast(beb). #12

  13. Agenda: High Temperature Membrane Working Group Meeting

    Broader source: Energy.gov [DOE]

    Agenda for the High Temperature Membrane Working Group (HTMWG) meeting on May 18, 2009, in Arlington, Virginia

  14. Catalysis Working Group Meeting: June 2015

    Broader source: Energy.gov [DOE]

    Agenda and presentations from the Catalysis Working Group meeting held on June 8, 2015, in Arlington, Virginia.

  15. Applied Microearthquake Techniques for Geothermal Resource Development

    E-Print Network [OSTI]

    Foulger, G. R.

    . In recent years, interest in exploiting geothermal energy has increased greatly, accompanied by interest. The microearthquake techniques currently producing the most useful results for geothermal energy production, and whichApplied Microearthquake Techniques for Geothermal Resource Development Gillian R. Foulger1 & Bruce

  16. e! Science News Semiconductor manufacturing technique holds

    E-Print Network [OSTI]

    Rogers, John A.

    e! Science News Semiconductor manufacturing technique holds promise for solar energy PublishedSemiconductor manufacturing technique holds promise for solar energy | e! Science News 5/26/2010http semiconductor manufacturing method pioneered at the University of Illinois, the future of solar energy just got

  17. Design techniques for forest management planning

    E-Print Network [OSTI]

    Design techniques for forest management planning Practice Guide #12;#12;Practice Guide Design by the Forestry Commission in 1998 as `Forest design planning: a guide to good practice'. This revised second edition published in 2014. ISBN: 978-0-85538-894-2 Forestry Commission (2014). Design techniques

  18. QUANTITATIVE RISK MANAGEMENT: CONCEPTS, TECHNIQUES AND TOOLS*

    E-Print Network [OSTI]

    Embrechts, Paul

    QUANTITATIVE RISK MANAGEMENT: CONCEPTS, TECHNIQUES AND TOOLS* Paul Embrechts Department of Mathematics ETH Zurich www.math.ethz.ch/~embrechts #12;QUANTITATIVE RISK MANAGEMENT: CONCEPTS, TECHNIQUES Theorems of Quantitative Risk Management · PE's Desert-Island Copula · Example 1: Credit Risk · Example 2

  19. Data Mining: Foundation, Techniques and Applications

    E-Print Network [OSTI]

    Tung, Anthony Kum Hoe

    Data Mining: Foundation, Techniques and Applications Anthony Tung() School of Computing National #12;11/30/2007 Data Mining: Foundation, Techniques and Applications 2 Main objectives of this course: · Data mining is a diverse field which draw its foundation from many research areas like databases

  20. Opto-electrokinetic manipulation technique for highperformance

    SciTech Connect (OSTI)

    Kwon, Jae-Sung [Purdue University; Ravindranath, Sandeep [Purdue University; Kumar, Aloke [ORNL; Irudayaraj, Joseph [Purdue University; Wereley, Steven T. [Purdue University

    2012-01-01

    This communication first demonstrates bio-compatibility of a recently developed opto-electrokinetic manipulation technique, using microorganisms. Aggregation, patterning, translation, trapping and size-based separation of microorganisms performed with the technique firmly establishes its usefulness for development of a high-performance on-chip bioassay system.

  1. Directed Test Suite Augmentation: Techniques and Tradeoffs

    E-Print Network [OSTI]

    Directed Test Suite Augmentation: Techniques and Tradeoffs Zhihong Xu, Yunho Kim, Moonzoo Kim and Technology kimyunho@kaist.ac.kr, moonzoo@cs.kaist.ac.kr ABSTRACT Test suite augmentation techniques are used in regression testing to identify code elements affected by changes and to generate test cases to cover those

  2. Dependable Computing Techniques for Reconfigurable Hardware

    E-Print Network [OSTI]

    Stanford University

    Hardware Wei-Je Robert Huang TR 01-7 June 2001 Center for Reliable Computing Gates Building 2A, Room 236 "Dependable Computing Techniques for Reconfigurable Hardware." Funding: This research was supported TECHNIQUES FOR RECONFIGURABLE HARDWARE A DISSERTATION SUBMITTED TO THE DEPARTMENT OF ELECTRICAL ENGINEERING

  3. Techniques and Trends for Embedded System Design

    E-Print Network [OSTI]

    Bae, Doo-Hwan

    Techniques and Trends for Embedded System Design & Energy Estimation and Low-Power Design;Contents Introduction Techniques and trends for embedded system design Power estimation and low-powerHW development High cost & inefficient design loop Early separation of HW and SW Long design time/ high cost

  4. Information Security Group IY5512 Computer Security

    E-Print Network [OSTI]

    Mitchell, Chris

    Information Security Group IY5512 Computer Security Part 7b: Windows securityPart 7b: Windows security Chris Mitchell me@chrismitchell.net http://www.chrismitchell.net 1 Information Security Group) of Windows machines. 2 Information Security Group Objectives II · Focus on Active Directory, authentication

  5. Fourier Sampling Coset States of Nonabelian Groups

    E-Print Network [OSTI]

    Hallgren, Sean

    55 Chapter 6 Fourier Sampling Coset States of Nonabelian Groups In this chapter we analyze the HSP problem, to the HSP over the symmetric group S n . In particular, we will analyze Fourier sampling coset states when the group is nonabelian. We show that Fourier sampling a polynomial number of coset states

  6. ABB Group April 16, 2009 | Slide 1

    E-Print Network [OSTI]

    Basse, Nils Plesner

    Group April 16, 2009 | Slide 12 Research and development Validation EXPERIMENTS SIMULATIONS (e.g. CFD, UPB International Seminar in Electronics Engineering, May 2009 #12;© ABB Group April 16, 2009 | Slide of development tests/costs #12;© ABB Group April 16, 2009 | Slide 13 Measurements and CFD simulations compared

  7. 303:20130618.1036 Thermal Engineering Group

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    303:20130618.1036 Thermal Engineering Group LASP's Thermal Engineering Group is involved in all of the component, as well as on-orbit trending and operations planning. Design Experience The Thermal Engineering Systems Engineering The group has formulated general thermal design and thermal interface requirements

  8. Democratic Group Signatures with Threshold Traceability

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    of disputes the identity of the signer can be discovered by a designated group authority(group manager). Group are not ap- plicable to the following scenario[19]. In the presence of economic globalization joint venture ventures companies form strategic al- liances that help them to enter new economic markets and further

  9. Certifying Solutions to Permutation Group Problems

    E-Print Network [OSTI]

    Sorge, Volker

    the integration of permutation group algorithms with proof planning. We consider eight basic questions arising planning. We consider eight basic questions arising in computational permutation group theory, for whichCertifying Solutions to Permutation Group Problems Arjeh Cohen 1 , Scott H. Murray 1#3; , Martin

  10. Certifying Solutions to Permutation Group Problems

    E-Print Network [OSTI]

    Murray, Scott H.

    of permutation group algorithms with proof planning. We consider eight basic questions arising in com- putational the integration of permutation group algorithms from computer algebra with proof planning. We consider eight basicCertifying Solutions to Permutation Group Problems Arjeh Cohen1 , Scott H. Murray1, , Martin Pollet

  11. Proof Planning some Permutation Group Problems | Abstract |

    E-Print Network [OSTI]

    Sorge, Volker

    of permutation group algorithms from computer algebra with proof planning. We consider eight basic questions handle eight basic queries, ranging from \\Is this permutation in that permutation group?" to \\What suÃ?cient information. In detail we concentrate on the following eight problems: Let G be a group

  12. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto System Access Request/DD/YY): __________________________ In signing this agreement, I agree to use my account on the computer system at the Data Management Group only of another user. Although the Data Management Group will attempt to maintain service at all times and provide

  13. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto System Access Request: __________________________________________________________________________ In signing this agreement, I agree to use my account on the computer system at the Data Management Group only of another user. Although the Data Management Group will attempt to maintain service at all times and provide

  14. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto System Access Request/DD/YY): ________________________ In signing this agreement, I agree to use my account on the computer system at the Data Management Group only of another user. Although the Data Management Group will attempt to maintain service at all times and provide

  15. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto access. Although the Data Management Group will attempt to maintain service at all times and provide regular file Management Group has attempted to ensure the accuracy of the data, the data is provided "as is

  16. Data Management Group Joint Program in Transportation

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Joint Program in Transportation University of Toronto access of another user. Although the Data Management Group will attempt to maintain service at all times and provide Management Group has assembled the data from various sources and has attempted to ensure the data fields

  17. Algebraic Cellular Automata and Groups Michel Coornaert

    E-Print Network [OSTI]

    Delzant, Thomas

    Algebraic Cellular Automata and Groups Michel Coornaert IRMA, Strasbourg, France International Cellular Automata and Groups March 7, 2011 1 / 25 #12;Algebraic Cellular Automata and Groups Michel, On algebraic cellular automata, arXiv:1011.4759. Michel Coornaert (IRMA, Strasbourg, France) Algebraic Cellular

  18. Local Groups Online: Political Learning and Participation

    E-Print Network [OSTI]

    Carroll, John M.

    Classification Keywords: H.5.3 Group and Organization interfaces, Collaborative computing 1. Introduction Human (Blau, 1977; Rogers, 1995). These commonalities may be as primary as family, kin and friends influencing policy through advocacy. At the group level of analysis, many groups combine instrumental

  19. A graphical technique for explaining the relationship between energy security and greenhouse gas emissions

    E-Print Network [OSTI]

    Hughes, Larry

    ERG/200806 A graphical technique for explaining the relationship between energy security and greenhouse gas emissions Larry Hughes and Nikita Sheth Energy Research Group Department of Electrical the relationship between energy security and greenhouse gas emissions Larry Hughes and Nikita Sheth Abstract

  20. Predictors of Employee Group Cohesion and Group Performance: A Study of Primary Care Practices 

    E-Print Network [OSTI]

    Trevino, Monica

    2013-08-29

    Research regarding organizational workgroups has substantially increased over the past two decades given that successful groups and teams are associated with having several important attributes, including group cohesion and group performance...

  1. Sustainability Peer Educator Group Lead Positions Position: Sustainability Peer Educators Group Lead

    E-Print Network [OSTI]

    Boonstra, Rudy

    Sustainability Peer Educator Group Lead Positions Position: Sustainability Peer Educators Group times) Term of position: September 2013 ­ April 2014 Position Summary: Working with the Sustainability Project Coordinator, the Sustainability Peer Educator Group Leads will be responsible

  2. Cognitive Engineering Group Contact group leader: Cristobal.Curio@tuebingen.mpg.de

    E-Print Network [OSTI]

    Cognitive Engineering Group Contact group leader: Cristobal.Curio@tuebingen.mpg.de Research Max Planck Institute for Biological Cybernetics Goal: To develop reliable, non-intrusive, Human paper awards In the Cognitive Engineering group computer scientists, psychologists, mathematicians

  3. PFT Air Infiltration Measurement Technique | Department of Energy

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

    Infiltration Measurement Technique PFT Air Infiltration Measurement Technique The Brookhaven National Laboratory developed the PFT (PerFluorocarbon tracer gas) technique to...

  4. Method of manufacturing semiconductor having group II-group VI compounds doped with nitrogen

    DOE Patents [OSTI]

    Compaan, Alvin D.; Price, Kent J.; Ma, Xianda; Makhratchev, Konstantin

    2005-02-08

    A method of making a semiconductor comprises depositing a group II-group VI compound onto a substrate in the presence of nitrogen using sputtering to produce a nitrogen-doped semiconductor. This method can be used for making a photovoltaic cell using sputtering to apply a back contact layer of group II-group VI compound to a substrate in the presence of nitrogen, the back coating layer being doped with nitrogen. A semiconductor comprising a group II-group VI compound doped with nitrogen, and a photovoltaic cell comprising a substrate on which is deposited a layer of a group II-group VI compound doped with nitrogen, are also included.

  5. Group/Company Name________________________________________________________________________ Group Number_______________________________________________________ Office Location________________________________________ Date of Hire____________________________

    E-Print Network [OSTI]

    Snider, Barry B.

    Group/Company Name________________________________________________________________________ Group Divorced Domestic Partner Type of Coverage Requested: Individual Family Other Date______________________ Names of Family Members Covered___________________________________ Is Spouse

  6. Nonlinear optics determination of the symmetry group of a crystal using structured light

    E-Print Network [OSTI]

    Jauregui, Rocio

    2015-01-01

    We put forward a technique to unveil to which symmetry group a nonlinear crystal belongs, making use of nonlinear optics with structured light. We consider as example the process of spontaneous parametric down-conversion. The crystal, which is illuminated with a special type of Bessel beam, is characterized by a nonlinear susceptibility tensor whose structure is dictated by the symmetry group of the crystal. The observation of the spatial angular dependence of the lower-frequency generated light provides direct information about the symmetry group of the crystal.

  7. An uncertainty principle for unimodular quantum groups

    SciTech Connect (OSTI)

    Crann, Jason; Kalantar, Mehrdad E-mail: mkalanta@math.carleton.ca

    2014-08-15

    We present a generalization of Hirschman's entropic uncertainty principle for locally compact Abelian groups to unimodular locally compact quantum groups. As a corollary, we strengthen a well-known uncertainty principle for compact groups, and generalize the relation to compact quantum groups of Kac type. We also establish the complementarity of finite-dimensional quantum group algebras. In the non-unimodular setting, we obtain an uncertainty relation for arbitrary locally compact groups using the relative entropy with respect to the Haar weight as the measure of uncertainty. We also show that when restricted to q-traces of discrete quantum groups, the relative entropy with respect to the Haar weight reduces to the canonical entropy of the random walk generated by the state.

  8. 2008 Nature Publishing Group NEWS & VIEWS

    E-Print Network [OSTI]

    Tackley, Paul J.

    energy prices, restoration strategies should not depend on energy-intensive techniques, ecotechnological approaches that depend mainly on natural energies such as tides, waves and natural currents

  9. Superhydrophobic Materials Technology-PVC Bonding Techniques

    SciTech Connect (OSTI)

    Hunter, Scott R.; Efird, Marty

    2013-05-03

    The purpose of the technology maturation project was to develop an enhanced application technique for applying diatomaceous earth with pinned polysiloxane oil to PVC pipes and materials. The oil infiltration technique is applied as a spray of diluted oil in a solvent onto the superhydrophobic diatomaceous earth substrate. This makes the surface take on the following characteristics: • wet?cleanable • anti?biofouling • waterproof • anti?corrosion. The project involved obtaining input and supplies from VeloxFlow and the development of successful techniques that would quickly result in a commercial license agreement with VeloxFlow and other companies that use PVC materials in a variety of other fields of use.

  10. Value-based Customer Grouping from Large Retail Data-sets Alexander Strehl and Joydeep Ghosh

    E-Print Network [OSTI]

    Strehl, Alexander

    on a real retail industry data-set of several thousand customers and products, to demonstrate the power of the proposed technique. Keywords: Data mining, clustering, graph partitioning, retail marketing 1. INTRODUCTIONValue-based Customer Grouping from Large Retail Data-sets Alexander Strehl and Joydeep Ghosh

  11. Soft X-ray techniques to study mesoscale magnetism

    E-Print Network [OSTI]

    Kortright, Jeffrey B.

    2003-01-01

    X-Ray Techniques to Study Mesoscale Magnetism Jeffrey B.X-Ray Techniques to Study Mesoscale Magnetism Jeffrey B.

  12. Techniques for enhanced physical-layer security

    E-Print Network [OSTI]

    Pinto, Pedro C.

    Information-theoretic security--widely accepted as the strictest notion of security--relies on channel coding techniques that exploit the inherent randomness of propagation channels to strengthen the security of communications ...

  13. Tailoring couple therapy techniques to client needs 

    E-Print Network [OSTI]

    Hsueh, Annie C.

    2010-01-14

    Research illuminating which therapist techniques are used in care-as-usual couple therapy, and under what circumstances, can contribute to a fuller understanding of how therapy works. The overall goal of the present study was to better understand...

  14. Continuous flow separation techniques for microchemical synthesis

    E-Print Network [OSTI]

    Kralj, Jason G

    2006-01-01

    Performing multistep microchemical synthesis requires many techniques from combining micromixers in series to the development of continuous microfluidic separation tools. Safety, high heat and mass transfer rates, and cost ...

  15. Internal Benchmarking Outreach and Data Collection Techniques

    Broader source: Energy.gov [DOE]

    U.S. Department of Energy (DOE) Technical Assistance Program (TAP) presentation at a TAP webinar held on April 11, 2013 and dealing with internal benchmarking outreach and data collection techniques.

  16. Proper Injection Techniques in Dairy Cattle 

    E-Print Network [OSTI]

    Villarino, Mario A.

    2009-05-04

    sanitation guidelines. Selecting the drug, dosage and injection technique Consult a veterinarian and read the medication label ? and/or package insert before vaccinating animals. Administer only drugs labeled for use in dairy ? cattle. Refer...

  17. Comparison of Virtualization and Containerization Techniques...

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

    Comparison of Virtualization and Containerization Techniques for High-Performance Computing July 31, 2015 1:30PM to 2:30PM Presenter Yuyu Zhou, University of Pittsburgh Location...

  18. Comparison of receiver function deconvolution techniques

    E-Print Network [OSTI]

    Pesce, Kathryn A

    2010-01-01

    Receiver function (RF) techniques are commonly used by geophysicists to image discontinuities and estimate layer thicknesses within the crust and upper mantle. A receiver function is a time-series record of the P-to-S (Ps) ...

  19. Techniques for green radio cellular communications 

    E-Print Network [OSTI]

    Videv, Stefan

    2013-07-01

    This thesis proposes four novel techniques to solve the problem of growing energy consumption requirements in cellular communication networks. The first and second part of this work propose a novel energy efficient ...

  20. Review of Building Energy Saving Techniques 

    E-Print Network [OSTI]

    Zeng, X.; Zhu, D.

    2006-01-01

    The pace of building energy saving in our country is late, compared with developed countries, and the consumption of building energy is much higher. Therefore, it is imperative to open up new building energy saving techniques and heighten energy use...

  1. Spring Semester, Course Title: Scanned Probe Techniques

    E-Print Network [OSTI]

    Sherrill, David

    : a fundamental understanding of the theoretical underpinnings behind each scanned probe technique Scanning Probe Methods (Vol. 1-13) ­ Bharat Bhushan, ed. Springer Handbook of Nanotechnology - Bharat Roughness o Representative applications in surface science HOPG Silicon Screw dislocations Liquid

  2. Method for automatically evaluating a transition from a batch manufacturing technique to a lean manufacturing technique

    DOE Patents [OSTI]

    Ivezic, Nenad; Potok, Thomas E.

    2003-09-30

    A method for automatically evaluating a manufacturing technique comprises the steps of: receiving from a user manufacturing process step parameters characterizing a manufacturing process; accepting from the user a selection for an analysis of a particular lean manufacturing technique; automatically compiling process step data for each process step in the manufacturing process; automatically calculating process metrics from a summation of the compiled process step data for each process step; and, presenting the automatically calculated process metrics to the user. A method for evaluating a transition from a batch manufacturing technique to a lean manufacturing technique can comprise the steps of: collecting manufacturing process step characterization parameters; selecting a lean manufacturing technique for analysis; communicating the selected lean manufacturing technique and the manufacturing process step characterization parameters to an automatic manufacturing technique evaluation engine having a mathematical model for generating manufacturing technique evaluation data; and, using the lean manufacturing technique evaluation data to determine whether to transition from an existing manufacturing technique to the selected lean manufacturing technique.

  3. Data Capture Technique for High Speed Signaling

    DOE Patents [OSTI]

    Barrett, Wayne Melvin (Rochester, MN); Chen, Dong (Croton On Hudson, NY); Coteus, Paul William (Yorktwon Heights, NY); Gara, Alan Gene (Mount Kisco, NY); Jackson, Rory (Eastchester, NY); Kopcsay, Gerard Vincent (Yorktown Hieghts, NY); Nathanson, Ben Jesse (Teaneck, NY); Vranas, Paylos Michael (Bedford Hills, NY); Takken, Todd E. (Brewster, NY)

    2008-08-26

    A data capture technique for high speed signaling to allow for optimal sampling of an asynchronous data stream. This technique allows for extremely high data rates and does not require that a clock be sent with the data as is done in source synchronous systems. The present invention also provides a hardware mechanism for automatically adjusting transmission delays for optimal two-bit simultaneous bi-directional (SiBiDi) signaling.

  4. Cascade Training Technique for Particle Identification

    E-Print Network [OSTI]

    Yong Liu; Ion Stancu

    2006-11-27

    The cascade training technique which was developed during our work on the MiniBooNE particle identification has been found to be a very efficient way to improve the selection performance, especially when very low background contamination levels are desired. The detailed description of this technique is presented here based on the MiniBooNE detector Monte Carlo simulations, using both artifical neural networks and boosted decision trees as examples.

  5. Lidar techniques for search and rescue

    SciTech Connect (OSTI)

    Cabral, W.L.

    1985-01-01

    Four techniques for using LIDAR in Search and Rescue Operations will be discussed. The topic will include laser retroreflection, laser-induced fluorescence in the visible, laser-induced fluorescence during daylight hours, and laser-induced fluorescence in the uv. These techniques use high-repetition rate lasers at a variety of frequencies to induce either fluorescence in dye markers or retroreflection from plastic corner cubes on life preservers and other emergency markers.

  6. Automatically Identifying Groups Based on Content and Collective Behavioral Patterns of Group Members

    SciTech Connect (OSTI)

    Gregory, Michelle L.; Engel, David W.; Bell, Eric B.; Piatt, Andrew W.; Dowson, Scott T.; Cowell, Andrew J.

    2011-07-17

    Online communities, or groups, have largely been defined based on links, page rank, and eigenvalues. In this paper we explore identifying abstract groups, groups where member's interests and online footprints are similar but they are not necessarily connected to one another explicitly. We use a combination of structural information and content information from posts and their comments to build a footprint for groups. We find that these variables do a good job at identifying groups, placing members within a group, and help determine the appropriate granularity for group boundaries.

  7. Improving the reproducibility of pyrolysis MS techniques

    SciTech Connect (OSTI)

    Roussis, S.G.; Fedora, J.W. [Imperial Oil, Sarnia (Canada)

    1995-12-31

    The analysis of the majority of volatile samples is primarily accomplished with established techniques (EI, CI). These techniques are based on the direct vapourization of the sample, upon heating, in the ionization source of a mass spectrometer. Typical analytical techniques, able to analyze non-volatile samples are those that allow the desorption of components from the solid or liquid phase directly to the gas phase. Field Desorption (FD) and Desorption Chemical Ionization (DCI) are two of these techniques. Fast Atom Bombardment (FAB) has been more successful in analyzing polar samples than non-volatile hydrocarbon samples. Limited information is available for the capabilities of the newer ionization techniques (Electrospray Ionization, ESI; Matrix Assisted Laser Desorption Ionization, MALDI) to characterize the non-volatile hydrocarbon samples. ESI of mixtures of compounds produces complex mass spectra, consisting of multiply charged ion species, that may be difficult to interpret. MALDI has the potential for ionization of non-volatile hydrocarbon samples, but extensive research is required to determine the appropriate matrix compounds that will permit the unbiased desorption of all sample components. An important requirement in the characterization of the non-volatile samples using direct desorption techniques without prior chromatographic separation, is the use of ultra high resolution (>50,000), for the separation of high molecular weight isobaric peaks. In the present work, the experimental parameters affecting reproducibility have been studied, optimum conditions have been determined that permit reproducible analysis.

  8. Automatic identification of abstract online groups

    DOE Patents [OSTI]

    Engel, David W; Gregory, Michelle L; Bell, Eric B; Cowell, Andrew J; Piatt, Andrew W

    2014-04-15

    Online abstract groups, in which members aren't explicitly connected, can be automatically identified by computer-implemented methods. The methods involve harvesting records from social media and extracting content-based and structure-based features from each record. Each record includes a social-media posting and is associated with one or more entities. Each feature is stored on a data storage device and includes a computer-readable representation of an attribute of one or more records. The methods further involve grouping records into record groups according to the features of each record. Further still the methods involve calculating an n-dimensional surface representing each record group and defining an outlier as a record having feature-based distances measured from every n-dimensional surface that exceed a threshold value. Each of the n-dimensional surfaces is described by a footprint that characterizes the respective record group as an online abstract group.

  9. USD Catalysis Group for Alternative Energy

    SciTech Connect (OSTI)

    Hoefelmeyer, James D.; Koodali, Ranjit; Sereda, Grigoriy; Engebretson, Dan; Fong, Hao; Puszynski, Jan; Shende, Rajesh; Ahrenkiel, Phil

    2012-03-13

    The South Dakota Catalysis Group (SDCG) is a collaborative project with mission to develop advanced catalysts for energy conversion with two primary goals: (1) develop photocatalytic systems in which polyfunctionalized TiO2 are the basis for hydrogen/oxygen synthesis from water and sunlight (solar fuels group), (2) develop new materials for hydrogen utilization in fuel cells (fuel cell group). In tandem, these technologies complete a closed chemical cycle with zero emissions.

  10. Infinite-Dimensional Representations of 2-Groups

    E-Print Network [OSTI]

    John C. Baez; Aristide Baratin; Laurent Freidel; Derek K. Wise

    2011-02-09

    A "2-group" is a category equipped with a multiplication satisfying laws like those of a group. Just as groups have representations on vector spaces, 2-groups have representations on "2-vector spaces", which are categories analogous to vector spaces. Unfortunately, Lie 2-groups typically have few representations on the finite-dimensional 2-vector spaces introduced by Kapranov and Voevodsky. For this reason, Crane, Sheppeard and Yetter introduced certain infinite-dimensional 2-vector spaces called "measurable categories" (since they are closely related to measurable fields of Hilbert spaces), and used these to study infinite-dimensional representations of certain Lie 2-groups. Here we continue this work. We begin with a detailed study of measurable categories. Then we give a geometrical description of the measurable representations, intertwiners and 2-intertwiners for any skeletal measurable 2-group. We study tensor products and direct sums for representations, and various concepts of subrepresentation. We describe direct sums of intertwiners, and sub-intertwiners - features not seen in ordinary group representation theory. We study irreducible and indecomposable representations and intertwiners. We also study "irretractable" representations - another feature not seen in ordinary group representation theory. Finally, we argue that measurable categories equipped with some extra structure deserve to be considered "separable 2-Hilbert spaces", and compare this idea to a tentative definition of 2-Hilbert spaces as representation categories of commutative von Neumann algebras.

  11. Plenia Locatel Group: Globalizing from Venezuela

    E-Print Network [OSTI]

    Gibson, Cyrus

    2009-05-01

    In 2009 the founders and top executives of Plenia Locatel Group, a retail business in Venezuela specializing in health care products and services, were planning a global

  12. . . . . . 85 . . . . . International Deep Drawing Research Group

    E-Print Network [OSTI]

    . . . . . 85 . . . . . International Deep Drawing Research Group IDDRG 2009 International 20899-855 USA e-mail: mark.iadicola@nist.gov, Web page: www

  13. Preliminary Notice of Violation, Washington Group International...

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

    October 23, 2003 Issued to Washington Group International related to Falsification of Records and Procurement Deficiencies at the Advanced Mixed Waste Treatment Project at the...

  14. Federal Utility Partnership Working Group Utility Partners

    Broader source: Energy.gov [DOE]

    Federal Utility Partnership Working Group (FUPWG) utility partners are eager to work closely with Federal agencies to help achieve energy management goals.

  15. Pyramidal Ownership in Ecuadorian Business Groups 

    E-Print Network [OSTI]

    Granda Kuffo, Maria L.

    2010-01-16

    INTRODUCTION??........................................................................ 1 II LITERATURE REVIEW..................................................................... 8 III DATA AND BACKGROUND............................................................... 17 Ecuadorian business groups ........................................................... 17 Data and statistics........................................................................... 20 IV THE TUNNELING HYPOTHESIS...

  16. ASRAC MREF Working Group Notice of Intent

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

    rulemaking process, and instead explore openly with other parties all ideas that may emerge from the working group's discussions. E. Facilitator The facilitator will act as a...

  17. Joint Outreach Task Group Calendar: September 2013

    Broader source: Energy.gov [DOE]

    Joint Outreach Task Group (JOTG)has created a monthly calendar of community events to facilitate interagency and community involvement in these events. September 2013

  18. Nuclear Suppliers Group & Regimes | National Nuclear Security...

    National Nuclear Security Administration (NNSA)

    Suppliers Group & Regimes | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing Proliferation Powering the...

  19. Group 3: Humidity, Temperature, and Voltage (Presentation)

    SciTech Connect (OSTI)

    Wohlgemuth, J.

    2013-05-01

    Group 3 is chartered to develop accelerated stress tests that can be used as comparative predictors of module lifetime versus stresses associated with humidity, temperature and voltage.

  20. Spring O&M Users Group Meeting

    Broader source: Energy.gov [DOE]

    The spring 2015 UVIG O&M User Group meeting will feature a plenary session focused on blade inspection best practices.  The UVIG membership will hear presentations from:

  1. Distributed Energy Systems Integration Group (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-10-01

    Factsheet developed to describe the activites of the Distributed Energy Systems Integration Group within NREL's Electricity, Resources, and Buildings Systems Integration center.

  2. Federal Utility Partnership Working Group - Utility Interconnection...

    Energy Savers [EERE]

    Federal Utility Partnership Working Group (FUPWG) meeting-discusses solarphotovoltaic (PV) projects to connect with utility in California and their issues. fupwgfall12jewell.pd...

  3. Phenomena Identification and Ranking Technique (PIRT) Panel Meeting Summary Report

    SciTech Connect (OSTI)

    Mark Holbrook

    2007-07-01

    Phenomena Identification and Ranking Technique (PIRT) is a systematic way of gathering information from experts on a specific subject and ranking the importance of the information. NRC, in collaboration with DOE and the working group, conducted the PIRT exercises to identify safety-relevant phenomena for NGNP, and to assess and rank the importance and knowledge base for each phenomenon. The overall objective was to provide NRC with an expert assessment of the safety-relevant NGNP phenomena, and an overall assessment of R and D needs for NGNP licensing. The PIRT process was applied to five major topical areas relevant to NGNP safety and licensing: (1) thermofluids and accident analysis (including neutronics), (2) fission product transport, (3) high temperature materials, (4) graphite, and (5) process heat for hydrogen cogeneration.

  4. Homotopy Groups Braid Groups Main Results Methods of the Proofs Remarks Mirror Reflections on Braids and the Higher

    E-Print Network [OSTI]

    Wu, Jie

    Homotopy Groups Braid Groups Main Results Methods of the Proofs Remarks Mirror Reflections Braid Groups Main Results Methods of the Proofs Remarks Artin Braids and Homotopy Groups Homotopy Groups Braid Groups Main Results Methods of the Proofs Remarks #12;Homotopy Groups Braid Groups Main Results

  5. Retinoblastoma-comparative analysis of external radiotherapy techniques, including an IMRT technique

    SciTech Connect (OSTI)

    Reisner, Marcio Lemberg [Department of Radiation Oncology, Hospital Universitario Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro (Brazil)]. E-mail: mreisner@uol.com.br; Viegas, Celia Maria Pais [Department of Radiation Oncology, Instituto Nacional de Cancer, Rio de Janeiro (Brazil); Grazziotin, Rachele Zanchet [Department of Radiation Oncology, Instituto Nacional de Cancer, Rio de Janeiro (Brazil); Santos Batista, Delano Valdivino [Division of Medical Physics, Department of Radiation Oncology, Instituto Nacional de Cancer, Rio de Janeiro (Brazil); Carneiro, Tulio Meneses; Mendonca de Araujo, Carlos Manoel [Department of Radiation Oncology, Instituto Nacional de Cancer, Rio de Janeiro (Brazil); Marchiori, Edson [Department of Radiology, Hospital Universitario Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro (Brazil)

    2007-03-01

    Purpose: To compare the numerous external radiotherapy (RT) techniques for the treatment of retinoblastoma, as well as an intensity-modulated RT (IMRT) technique. The latter was elaborated to evaluate the potential dose reduction in the surrounding tissue, as well as the potential avoidance of subdosage in the ora serrata retinae. Methods and Materials: A 2-year-old patient with unilateral retinoblastoma underwent CT. With the aid of an ophthalmologist, the ocular structures were delimited, and 13 techniques described in published reports were reproduced on three-dimensional planning software and identified according to their authors. A technique with four noncoplanar fields using IMRT was also elaborated. These techniques were compared according to the dose to the ora serrata retinae, lens, orbit (volume that received a dose of {>=}20 Gy), vitreous, optic nerve, lacrimal gland (volume that received a dose of {>=}34 Gy), and cornea and according to their ease of reproducibility. Results: The techniques that attained the therapeutic dose to the ora serrata retinae were the IMRT technique and the techniques of Haye, Cassady, Cormack, and al-Beteri. The Cormack technique had the lowest volume that received a dose of {>=}20 Gy in the orbit, followed by the IMRT technique. The IMRT technique also achieved the lowest volume that received a dose of {>=}34 Gy (14%) in the lacrimal gland. The Abramson/McCormick/Blach, Cassady, Reese, and Schipper techniques were the easiest to reproduce and the Chin the most complex. Conclusion: Retinoblastoma treatment with IMRT has an advantage over the other techniques, because it allows for the greatest reduction of dose to the orbit and lacrimal gland, while maintaining the therapeutic dose to the ora serrata retinae and vitreous.

  6. Micro-fabrication Techniques for Target Components

    SciTech Connect (OSTI)

    Miles, R; Hamilton, J; Crawford, J; Ratti, S; Trevino, J; Graff, T; Stockton, C; Harvey, C

    2008-06-10

    Micro-fabrication techniques, derived from the semi-conductor industry, can be used to make a variety of useful mechanical components for targets. A selection of these components including supporting cooling arms for prototype cryogenic inertial confinement fusion targets, stepped and graded density targets for materials dynamics experiments are described. Micro-fabrication enables cost-effective, simultaneous fabrication of multiple high-precision components with complex geometries. Micro-fabrication techniques such as thin-film deposition, photo-lithographic patterning and etch processes normally used in the semi-conductor manufacture industry, can be exploited to make useful mechanical target components. Micro-fabrication processes have in recent years been used to create a number of micro-electro-mechanical systems (MEMS) components such as pressure sensors, accelerometers, ink jet printer heads, microfluidics platforms and the like. These techniques consist primarily of deposition of thin films of material, photo-lithographic patterning and etching processes performed sequentially to produce three dimensional structures using essentially planar processes. While the planar technology can be limiting in terms of the possible geometries of the final product, advantages of using these techniques include the ability to make multiple complex structures simultaneously and cost-effectively. Target components fabricated using these techniques include the supporting cooling arms for cryogenic prototype fusion ignition targets, stepped targets for equation-of-state experiments, and graded density reservoirs for material strength experiments.

  7. RENEWABLE ENERGY GROUPS COVET FUSION'S BUDGET

    E-Print Network [OSTI]

    RENEWABLE ENERGY GROUPS COVET FUSION'S BUDGET A group called the Energy Efficiency Education billion in the DOE budget out of fusion, fission and fossil energy research and into "more cost-effective and environmentally sound energy- efficiency and renewable energy programs." Rep. Philip R. Sharp (D-IN) and chair

  8. IY5512: Part 1 Information Security Group

    E-Print Network [OSTI]

    Mitchell, Chris

    IY5512: Part 1 1 Information Security Group IY5512 Computer Security Part 1: Introduction to computer security Chris Mitchell me@chrismitchell.net http://www.chrismitchell.net 1 Information Security) ... 2 Information Security Group Agenda · Overview · Security goals · Security approaches ­ prevention

  9. Terms of Reference Information Security Group

    E-Print Network [OSTI]

    Haase, Markus

    Terms of Reference Information Security Group Version 3.1 8 March 2011 © University of Leeds 2011 Security Group Information Security Management 3.1 (8/3/11) Page 2 of 4 Document Control Owner: Kevin Darley, IT Security Co-ordinator, Information Systems Services, University of Leeds Source Location: V

  10. Fusion Technology Working Group Presented by

    E-Print Network [OSTI]

    California at Los Angeles, University of

    Snowmass Fusion Technology Working Group Summary Presented by M. Abdou, S. Milora Snowmass July 23, 1999 #12;Technology Working Group Subgroup # 1 Subgroup # 2 Solid Walls Ulrickson / Mattas Liquid Walls / Ying Chamber Technology Abdou / Ulrickson Heating/CD/Fueling Swain / Temkin Magnets Schultz / Woolley

  11. Working Group 4 April 25 -30 2000

    E-Print Network [OSTI]

    DIS2000 Working Group 4 April 25 - 30 2000 Liverpool, UK Di#11;ractive D #3;#6; (2010) Production Selection #15; Results from ZEUS and H1 #15; Conclusions #12; DIS2000 | Working Group 4 Jo Cole Why measure states, eg. J= #15; Study of charm provides test of under- lying dynamics of di#11;raction April 2000 2

  12. Identifying Risk Groups Associated with Colorectal Cancer

    E-Print Network [OSTI]

    Jin, Huidong "Warren"

    Identifying Risk Groups Associated with Colorectal Cancer Jie Chen1 , Hongxing He1 , Huidong Jin1 of identifying and describing risk groups for colorectal cancer (CRC) from population based administrative health are applied to the colorectal cancer patients' profiles in contrast to background pa- tients' profiles

  13. Group 3: Humidity, Temperature and Voltage (Presentation)

    SciTech Connect (OSTI)

    Wohlgemuth, J.

    2013-09-01

    This is a summary of the work of Group 3 of the International PV QA Task Force. Group 3 is chartered to develop accelerated stress tests that can be used as comparative predictors of module lifetime versus stresses associated with humidity, temperature and voltage.

  14. Free unitary groups are (almost) simple

    SciTech Connect (OSTI)

    Chirvasitu, Alexandru [Department of Mathematics, University of California, Berkeley, California 94720-3840 (United States)

    2012-12-15

    We show that the quotients of Wang and Van Daele's universal quantum groups by their centers are simple in the sense that they have no normal quantum subgroups, thus providing the first examples of simple compact quantum groups with non-commutative fusion rings.

  15. THE STRUCTURE OF UNIT GROUPS DANIEL KLINE

    E-Print Network [OSTI]

    May, J. Peter

    THE STRUCTURE OF UNIT GROUPS DANIEL KLINE Abstract. Since the time of ancient Greece and India are significant, because they correspond to the units of the rings Z[ d]. Along with prime numbers, units's Unit Theorem establishes the structure of the units of a number field as a finite abelian group

  16. 1Nanomaterials for Energy Group Byungwoo Park

    E-Print Network [OSTI]

    Park, Byungwoo

    Fuel Cell Solar Panel Portable Devices Solar Cell Phosphor Li+ Battery #12;4Nanomaterials for Energy://bp.snu.ac.kr Cutting-Edge Nanomaterials for Energy: Solar Cell · Li+ Battery #12;2Nanomaterials for Energy Group- Sensitized Solar Cells DSSC SONY DSSC KIST #12;6Nanomaterials for Energy Group e-e- h

  17. 302:20130613.1452 Quality Assurance Group

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    and software development from the preliminary design phase through launch. Our quality assurance expertise and software. LASP's quality management philosophy includes the belief that quality and safety302:20130613.1452 Quality Assurance Group LASP Quality Assurance Group is involved in hardware

  18. COMPLETELY SIMPLE SEMIGROUPS WITH NILPOTENT STRUCTURE GROUPS

    E-Print Network [OSTI]

    COMPLETELY SIMPLE SEMIGROUPS WITH NILPOTENT STRUCTURE GROUPS PRIMOZ MORAVEC Abstract. In this paper we find simple characterizations of completely simple semigroups with H -classes nilpotent of class c, and of completely simple semi- groups whose core has H -classes nilpotent of class c. The notion

  19. EG for systolic groups Piotr Przytycki

    E-Print Network [OSTI]

    Elsner, Tomasz

    EG for systolic groups Piotr Przytycki Institute of Mathematics, Polish Academy of Sciences from X is a finite model for EG. MSC: 20F67; 20F65; Keywords: Systolic group, simplicial nonpositive, then X is a finite model for EG. Similarly, if G acts properly on a CAT(0) space X and if G is torsion

  20. System and method for secure group transactions

    DOE Patents [OSTI]

    Goldsmith, Steven Y. (Rochester, MN)

    2006-04-25

    A method and a secure system, processing on one or more computers, provides a way to control a group transaction. The invention uses group consensus access control and multiple distributed secure agents in a network environment. Each secure agent can organize with the other secure agents to form a secure distributed agent collective.

  1. Exotic fusion systems over 2-groups

    E-Print Network [OSTI]

    Thévenaz, Jacques

    Exotic fusion systems over 2-groups Bob Oliver joint with Kasper Andersen and Joana Ventura The fusion category of a finite group G encodes the conjugacy relations within a Sylow p-subgroup S of GFS(G)(P, Q) = HomG(P, Q). 1 #12;The notion of an abstract fusion system is due to Puig. The definitions we

  2. Program Building Committee's Central Planning Group

    E-Print Network [OSTI]

    Richardson, Burl B.; Marshall, Mary G.

    1982-01-01

    of local citizens in program development. The basic units of the county program building committee are: ? CENTRAL PLANNING GROUP (executive committee or overall committee - see pages 4-5) ? PROGRAM AREA COMMITTEES (sometimes called subcommittees... chairmen ? other key leaders ...-.. ...-.....-.....-.. " CENTRAL ....... ....... .............. '" PLANNING o 000 GROUP Program Area Committees as needed 4 Another organizational structure entails a large county committee that, as a whole, serves...

  3. IY5512: Part 2 Information Security Group

    E-Print Network [OSTI]

    Mitchell, Chris

    ; ­ introduction to security evaluation criteria. Information Security Group Agenda · Design principles · DesignIY5512: Part 2 1 Information Security Group IY5512 Computer Security Part 2: Design & evaluation · This part of the course covers: ­ fundamental security design principles; ­ a security design methodology

  4. Some suggestions for adapting group and pair work techniques in teaching English as a second language in Tanzania 

    E-Print Network [OSTI]

    Igwilla, Juma C.

    1989-01-01

    English is regarded as a second language in Tanzania for it is the major language of law, government, education, business and industry. It is important that it is a compulsory subject in the curriculum - from primary to tertiary education level...

  5. Professor Janik's group utilizes atomistic modeling techniques, mainly first principles based electronic structure methods, to probe the relationship between the

    E-Print Network [OSTI]

    Edition (accepted for publication). 11. C. D. Taylor, M. J. Janik, M. Neurock, R. G. Kelly. "Ab Initio. Rossmeisl, J. K. Nørskov, C. D. Taylor, M. J. Janik, M. Neurock. "Calculated Phase Diagrams-21839. 9. M. J. Janik, R. J. Davis, M. Neurock. "A Density Functional Theory Study of the Alkylation

  6. Parsons Infrastructure & Technology Group, Inc. Preliminary Notice...

    Office of Environmental Management (EM)

    to a sheave pinch-point hazard and moving wire rope during the application of lubricant using a hand swabbing technique. Specific examples are listed below: A. Parsons did...

  7. Technique for Measuring Hybrid Electronic Component Reliability

    SciTech Connect (OSTI)

    Green, C.C.; Hernandez, C.L.; Hosking, F.M.; Robinson, D.; Rutherford, B.; Uribe, F.

    1999-01-01

    Materials compatibility studies of aged, engineered materials and hardware are critical to understanding and predicting component reliability, particularly for systems with extended stockpile life requirements. Nondestructive testing capabilities for component reliability would significantly enhance lifetime predictions. For example, if the detection of crack propagation through a solder joint can be demonstrated, this technique could be used to develop baseline information to statistically determine solder joint lifelengths. This report will investigate high frequency signal response techniques for nondestructively evaluating the electrical behavior of thick film hybrid transmission lines.

  8. Invariance, groups, and non-uniqueness: The discrete case

    SciTech Connect (OSTI)

    Vasco, D.W.

    2005-03-24

    Lie group methods provide a valuable tool for examininginvariance and non-uniqueness associated with geophysical inverseproblems. The techniques are particularly well suited for the study ofnon-linear inverse problems. Using the infinitesimal generators of thegroup it is possible to move within the null space in an iterativefashion. The key computational step in determining the symmetry groupsassociated with an inverse problem is the singular value decomposition(SVD) of a sparse matrix. I apply the methodology to the eikonal equationand examine the possible solutions associated with a crosswelltomographic experiment. Results from a synthetic test indicate that it ispossible to vary the velocity model significantly and still fit thereference arrival times. the approach is also applied to data fromcorosswell surveys conducted before and after a CO2 injection at the LostHills field in California. The results highlight the fact that a faultcross-cutting the region between the wells may act as a conduit for theflow of water and CO2.

  9. Hanford single-shell tank grouping study

    SciTech Connect (OSTI)

    Remund, K.M.; Anderson, C.M.; Simpson, B.C.

    1995-10-01

    A tank grouping study has been conducted to find Hanford single-shell tanks with similar waste properties. The limited sampling resources of the characterization program could be allocated more effectively by having a better understanding of the groups of tanks that have similar waste types. If meaningful groups of tanks can be identified, tank sampling requirements may be reduced, and the uncertainty of the characterization estimates may be narrowed. This tank grouping study considers the analytical sampling information and the historical information that is available for all single-shell tanks. The two primary sources of historical characterization estimates and information come from the Historical Tank Content Estimate (HTCE) Model and the Sort on Radioactive Waste Tanks (SORWT) Model. The sampling and historical information are used together to come up with meaningful groups of similar tanks. Based on the results of analyses presented in this report, credible tank grouping looks very promising. Some groups defined using historical information (HTCE and SORWT) correspond well with those based on analytical data alone.

  10. Presentations and Structural Properties of Self-similar Groups and Groups without Free Sub-semigroups 

    E-Print Network [OSTI]

    Benli, Mustafa G

    2013-07-22

    This dissertation is devoted to the study of self-similar groups and related topics. It consists of three parts. The first part is devoted to the study of examples of finitely generated amenable groups for which every ...

  11. Neutron and X-ray Scattering Techniques have proved so successful in condensed matter studies that a wide variety of sample environments have been developed in consquence. Many

    E-Print Network [OSTI]

    Boyer, Edmond

    Foreword Neutron and X-ray Scattering Techniques have proved so successful in condensed matter whose function is to develop and optimise the techniques appropriate to neutron scattering. Since other neutron and X-ray research centres have similar technical support groups, it was felt timely to unité

  12. Synthesis and Surface Chemistry of Group IV Nanocrystals (Friday...

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

    Synthesis and Surface Chemistry of Group IV Nanocrystals (Friday, September 18) Synthesis and Surface Chemistry of Group IV Nanocrystals, Nathan Neale, Group Leader, National...

  13. Prabhat Steps In as DAS Group LeadPage

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

    Group Lead September 1, 2014 prabhat Prabhat has been named Group Lead of the Data and Analytics Services (DAS) Group at the Department of Energy's National Energy Research...

  14. Group action in topos quantum physics

    SciTech Connect (OSTI)

    Flori, C.

    2013-03-15

    Topos theory has been suggested first by Isham and Butterfield, and then by Isham and Doering, as an alternative mathematical structure within which to formulate physical theories. In particular, it has been used to reformulate standard quantum mechanics in such a way that a novel type of logic is used to represent propositions. In this paper, we extend this formulation to include the notion of a group and group transformation in such a way that we overcome the problem of twisted presheaves. In order to implement this we need to change the type of topos involved, so as to render the notion of continuity of the group action meaningful.

  15. Groups and embeddings in SL(2, C)

    E-Print Network [OSTI]

    Button, J. O.

    2015-01-01

    are forced to be conjugate to each other. Proposition 3.5 Let F2 be free on a, b and let ? be the triple HNN extension formed using stable letters t, s, r so that tat?1 = b, sas?1 = ab and rar?1 = aba?1b?1. Then ? does not embed in SL(2,C) but is a graph... Memoirs, 20. Mathematical Society of Japan, Tokyo, 2009. [6] C.Champetier and V.Guirardel, Limit groups as limits of free groups, Israel J. Math. 146 (2005), 1–75. [7] M.Culler, Lifting representations to covering groups, Adv. in Math. 59 (1986), 64–70. [8...

  16. Hunton Group core workshop and field trip

    SciTech Connect (OSTI)

    Johnson, K.S.

    1993-12-31

    The Late Ordovician-Silurian-Devonian Hunton Group is a moderately thick sequence of shallow-marine carbonates deposited on the south edge of the North American craton. This rock unit is a major target for petroleum exploration and reservoir development in the southern Midcontinent. The workshop described here was held to display cores, outcrop samples, and other reservoir-characterization studies of the Hunton Group and equivalent strata throughout the region. A field trip was organized to complement the workshop by allowing examination of excellent outcrops of the Hunton Group of the Arbuckle Mountains.

  17. Scalable Compilers for Group Key Establishment : Two/Three Party to Group

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Scalable Compilers for Group Key Establishment : Two/Three Party to Group S. Sree Vivek1, , S presents the first scalable, efficient and generic compilers to construct group key exchange (GKE) protocols from two/three party key exchange (2-KE/3-KE) protocols. We propose three different compilers

  18. Scalable Compilers for Group Key Establishment : Two/Three Party to Group

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Scalable Compilers for Group Key Establishment : Two/Three Party to Group S. Sree Vivek 1,# , S presents the first scalable, e#cient and generic compilers to construct group key exchange (GKE) protocols from two/three party key exchange (2­KE/3­KE) protocols. We propose three di#erent compilers where

  19. Working Group 5 Applying Mathematics in Realistic Situations Group Leaders: Ivan Meznik & Enrica Lemut

    E-Print Network [OSTI]

    Spagnolo, Filippo

    Working Group 5 ­ Applying Mathematics in Realistic Situations Group Leaders: Ivan Meznik & Enrica Lemut Seven papers have been presented and discussed out of the 9 announced and the 8 included people presenting a contribution participated to all the Working Group sessions; also other people

  20. Sterile Technique Sterile (aseptic) technique is essential to avoiding contamination in yeast chronological life span

    E-Print Network [OSTI]

    Aris, John P.

    Sterile Technique Sterile (aseptic) technique is essential to avoiding contamination in yeast experiments have increased risk for contamination because the same samples / tubes are opened repeatedly over containers are open. Keep air movement to a minimum to limit airborne contamination. 6. Do not pour sterile

  1. High Harmonic Generation Basic Techniques & Challenges

    E-Print Network [OSTI]

    Budker, Dmitry

    High Harmonic Generation Basic Techniques & Challenges C. Michael R. Greaves #12;Regimes-cycle laser fields #12;Outline · Optical Field Atomic Ionization · High Harmonic Generation (HHG-rays · References #12;Optical Field Atomic Ionization · Harmonics are generated by the tunneling, transport

  2. Introduction Seismic inversion techniques provide us with

    E-Print Network [OSTI]

    Taylor, Mark A J

    Introduction Seismic inversion techniques provide us with information about the wave velocity stratigraphy requires a knowledge of the physical properties, such as the bulk and shear moduli, and the microstructure of media through which the waves travel. Understanding how seismic velocities depend

  3. Enhancing Compiler Techniques for Memory Energy Optimizations

    E-Print Network [OSTI]

    that the best performance opti- mizations do not necessarily generate the best energy behavior in mem- ory. WeEnhancing Compiler Techniques for Memory Energy Optimizations Joseph Zambreno1 , Mahmut Taylan frequencies steadily rise in modern microprocessors, energy consumption is quickly joining perfor- mance

  4. Artificial intelligence in engineering: Tools and techniques

    SciTech Connect (OSTI)

    Sriram, D.; Adey, R.A.

    1987-01-01

    Much of the early research in AI has focused on the development of the necessary tools and techniques for building applications. The 26 papers presented in this book summarise some of the latest developments and how they can be applied in engineering.

  5. Dynamical systems techniques for enhancing microfluidic mixing

    E-Print Network [OSTI]

    Balasuriya, Sanjeeva

    Dynamical systems techniques for enhancing microfluidic mixing Sanjeeva Balasuriya School@yahoo.com 17 March 2015 Abstract. Achieving rapid mixing is often desirable in microfluidic devices microfluidic situations (e.g., best cross-flow positioning in cross- channel micromixers, usage of channel

  6. Implementation Techniques for Inductive Types in Plastic ?

    E-Print Network [OSTI]

    Luo, Zhaohui

    Implementation Techniques for Inductive Types in Plastic ? Paul Callaghan and Zhaohui Luo://www.dur.ac.uk/CARG fP.C.Callaghan, Zhaohui.Luog@durham.ac.uk Abstract. In the context of Plastic, a proof assistant the reduction mechanisms of Plastic, and briefly considers optimisations for inductive types. Key words: type

  7. Compilation Techniques for Efficient Encrypted Computation

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Compilation Techniques for Efficient Encrypted Computation Christopher Fletcher MIT CSAIL cwfletch-dependent loops has not been a focus of attention. In this paper, we take a first step toward building a compiler the compilation step of a program with complex control constructs. Since the server deals with encrypted data

  8. Investigating Visual Feedforward for Target Expansion Techniques

    E-Print Network [OSTI]

    . Three design axes characterize the concept of atomic feedforward mechanism, an elementary unit that can expansion technique. Focusing on feedforward mechanisms, we introduce a design space that allows us the concept of atomic feedforward mechanism along three design axes. We then describe a target expansion

  9. Bornholm Web Mining Techniques rup Nielsen

    E-Print Network [OSTI]

    Nielsen, Finn Årup

    Bornholm Web Mining Techniques Finn A Æ rup Nielsen Informatics and Mathematical Modelling; Focused crawling #15; Counting links #15; Size of web-sites #15; PostScript/PDF conversion #15; Generation and Giles, 1998). \\[...] no engine indexes more than about 16% of the web" (Lawrence and Giles, 1999). #15

  10. Knowledge Engineering Technique for Cluster Development

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Knowledge Engineering Technique for Cluster Development Pradorn Sureephong1 , Nopasit Chakpitak1 management by using knowledge engineering which is one of the most important method for managing knowledge. This work analyzed three well known knowledge engineering methods, i.e. MOKA, SPEDE and Common

  11. Spectral averaging techniques for Jacobi matrices

    E-Print Network [OSTI]

    Rafael del Rio; Carmen Martinez; Hermann Schulz-Baldes

    2008-02-20

    Spectral averaging techniques for one-dimensional discrete Schroedinger operators are revisited and extended. In particular, simultaneous averaging over several parameters is discussed. Special focus is put on proving lower bounds on the density of the averaged spectral measures. These Wegner type estimates are used to analyze stability properties for the spectral types of Jacobi matrices under local perturbations.

  12. Medial Techniques for Automating Finite Element Analysis

    E-Print Network [OSTI]

    Whitton, Mary C.

    Medial Techniques for Automating Finite Element Analysis by Jessica Renee Crawford Crouch Analysis. (Under the direction of Stephen M. Pizer.) Finite element analysis provides a principled method the simulation of tissue deformation. The drawback to using finite element analysis for imaging problems

  13. Genetic Painting: A Salience Adaptive Relaxation Technique

    E-Print Network [OSTI]

    Collomosse, John

    Chapter 4 Genetic Painting: A Salience Adaptive Relaxation Technique for Painterly Rendering paintings1. We draw upon our previous ob- servations of artistic practice to define the degree of optimality for a painting to be measured by the correlation between the salience map of the original image and the level

  14. Seating Arrangement, Group Composition and Competition-driven Interaction: Effects on Students' Performance in Physics

    SciTech Connect (OSTI)

    Roxas, R. M.; Monterola, C.; Carreon-Monterola, S. L.

    2010-07-28

    We probe the effect of seating arrangement, group composition and group-based competition on students' performance in Physics using a teaching technique adopted from Mazur's peer instruction method. Ninety eight lectures, involving 2339 students, were conducted across nine learning institutions from February 2006 to June 2009. All the lectures were interspersed with student interaction opportunities (SIO), in which students work in groups to discuss and answer concept tests. Two individual assessments were administered before and after the SIO. The ratio of the post-assessment score to the pre-assessment score and the Hake factor were calculated to establish the improvement in student performance. Using actual assessment results and neural network (NN) modeling, an optimal seating arrangement for a class was determined based on student seating location. The NN model also provided a quantifiable method for sectioning students. Lastly, the study revealed that competition-driven interactions increase within-group cooperation and lead to higher improvement on the students' performance.

  15. Wigner Functions for Noncommutative Quantum Mechanics: a group representation based construction

    E-Print Network [OSTI]

    S. Hasibul Hassan Chowdhury; S. Twareque Ali

    2015-06-21

    This paper is devoted to the construction and analysis of the Wigner functions for noncommutative quantum mechanics, their marginal distributions and star-products, following a technique developed earlier, {\\it viz\\/,} using the unitary irreducible representations of the group $\\g$, which is the three fold central extension of the abelian group of $\\mathbb R^4$. These representations have been exhaustively studied in earlier papers. The group $\\g$ is identified with the kinematical symmetry group of noncommutative quantum mechanics of a system with two degrees of freedom. The Wigner functions studied here reflect different levels of non-commutativity -- both the operators of position and those of momentum not commuting, the position operators not commuting and finally, the case of standard quantum mechanics, obeying the canonical commutation relations only.

  16. RISK ASSESSMENT TECHNICAL EXPERT WORKING GROUP

    Broader source: Energy.gov [DOE]

    The Risk Assessment Technical Expert Working Group (RWG) is established to assist the Department of Energy (DOE) with the appropriate and effective use of quantitative risk assessment in nuclear...

  17. Enforcement Letter, Parsons Infrastructure & Technology Group...

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

    Infrastructure & Technology Group, Inc., related to a Form Wood Timber Fire at the Salt Waste Processing Facility at the Savannah River Site On July 13, 2009, the U.S....

  18. GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS

    E-Print Network [OSTI]

    Shoj, Toshiaki

    P describe Green functions QO(u)* *). Note that the matrix is completely determined GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS University of Tokyo Noda, Chiba 278-8510, Japan Abstract. Green functions

  19. Inserting Group Variables into Fluid Mechanics

    E-Print Network [OSTI]

    R. Jackiw

    2004-10-28

    A fluid, like a quark-gluon plasma, may possess degrees of freedom indexed by a group variable, which retains its identity even in the fluid/continuum description. Conventional Eulerian fluid mechanics is extended to encompass this possibility.

  20. Statistical Sciences Group, Los Alamos National Laboratory,

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    Luke Bornn CCS-6, Statistical Sciences Group, Los Alamos National Laboratory, MS F600, Los Alamos Institute, Los Alamos National Laboratory, MS T006, Los Alamos, NM 87545 Structural Health Monitoring

  1. Hydrogen Storage Workshop Advanced Concepts Working Group

    E-Print Network [OSTI]

    / Current Status · Aerogels are the scaffold; template with organic functional groups; physisorption, acid benign ­ Inexpensive #12;Self-Assembled Nanocomposites ­ R&D Needs 1. Studying silica aerogels 2. Modifying aerogels 3. Theoretical Modeling - various chemical structures / materials 4. Functionalization

  2. TEC/WG Tribal Topic Group

    Office of Environmental Management (EM)

    State Regional Groups. One day will focus on TRAGIS and the second day on RADTRAN routing models. If space is available, attendance will be opened up to DOE and contractor staff....

  3. Organizing Your 4-H Project Group 

    E-Print Network [OSTI]

    Howard, Jeff W.

    2005-05-10

    Project work allows 4-H volunteer leaders to teach and young people to learn new skills and gain new knowledge. Each project group should be organized in cooperation with the club's organizational leader. Use this guide when planning your first...

  4. PREVIOUS NIU LLI STUDY GROUPS Winter 2015

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    PREVIOUS NIU LLI STUDY GROUPS Winter 2015 Scandals of All Sorts ­ Carol Zar The Changing Media or Photograph? ­ Tom Smith #12;Science, Technology, Engineering, and Mathematics (STEM) at NIU ­ Omar Ghrayeb

  5. W Boson Mass Working Group Report

    SciTech Connect (OSTI)

    Kilgore, W.; Kilgore, W.

    2010-06-14

    The W boson mass working group discussed the current status of the W boson mass measurement and the prospects for improving on LEP and Tevatron measurements at the LHC.

  6. Topology of spaces of orderings of groups

    E-Print Network [OSTI]

    Harizanov, Valentina S.

    on ad infinitum. In this way, we get a convergent subsequence. M. Dabkowska, M. Dabkowski, V. Harizanov, J. Przytycki, M. Veve: generalization to semi- groups and other structures. My motivation

  7. Master's Thesis Hybrid Statistical Model Checking Technique for

    E-Print Network [OSTI]

    Master's Thesis Hybrid Statistical Model Checking Technique for Reliable Safety Critical Systems Technique for Reliable Safety Critical Systems #12;Hybrid Statistical Model Checking Technique for Reliable Safety Critical Systems Advisor : Professor Kim, Moonzoo by Kim, Youngjoo Department of Computer Science

  8. Eighteenth LAMPF users group meeting: proceedings

    SciTech Connect (OSTI)

    Bradbury, J.N. (comp.)

    1985-03-01

    The Eighteenth Annual LAMPF Users Group Meeting was held October 29-30, 1984, at the Clinton P. Anderson Meson Physics Facility. The program included a number of invited talks on various aspects of nuclear and particle physics as well as status reports on LAMPF and discussions of upgrade options. The LAMPF working groups met and discussed plans for the secondary beam lines, experimental programs, and computing facilities.

  9. Finite Density Matrix Renormalisation Group Algorithm for Anyonic Systems

    E-Print Network [OSTI]

    Robert N. C. Pfeifer; Sukhwinder Singh

    2015-05-01

    The numerical study of anyonic systems is known to be highly challenging due to their non-bosonic, non-fermionic particle exchange statistics, and with the exception of certain models for which analytical solutions exist, very little is known about their collective behaviour as a result. Meanwhile, the density matrix renormalisation group (DMRG) algorithm is an exceptionally powerful numerical technique for calculating the ground state of a low-dimensional lattice Hamiltonian, and has been applied to the study of bosonic, fermionic, and group-symmetric systems. The recent development of a tensor network formulation for anyonic systems opened up the possibility of studying these systems using algorithms such as DMRG, though this has proved challenging both in terms of programming complexity and computational cost. This paper presents the implementation of DMRG for finite anyonic systems, including a detailed scheme for the implementation of anyonic tensors with optimal scaling of computational cost. The anyonic DMRG algorithm is demonstrated by calculating the ground state energy of the Golden Chain, which has become the benchmark system for the numerical study of anyons, and is shown to produce results comparable to those of the anyonic TEBD algorithm and superior to the variationally optimised anyonic MERA, at far lesser computational cost.

  10. A market-power based model of business groups

    E-Print Network [OSTI]

    Feenstra, Robert C; Huang, D S; Hamilton, G G

    2003-01-01

    complicated. In our model, business groups not only sellof Indian groups. 3. A Model of Business Groups We willa market-power based model of business groups. This We

  11. Intragroup diffuse light in compact groups of galaxies II. HCG 15, 35 and 51

    E-Print Network [OSTI]

    C. Da Rocha; B. L. Ziegler; C. Mendes de Oliveira

    2008-05-29

    This continuing study of intragroup light in compact groups of galaxies aims to establish new constraints to models of formation and evolution of galaxy groups, specially of compact groups, which are a key part in the evolution of larger structures, such as clusters. In this paper we present three additional groups (HCG 15, 35 and 51) using deep wide field $B$ and $R$ band images observed with the LAICA camera at the 3.5m telescope at the Calar Alto observatory (CAHA). This instrument provides us with very stable flatfielding, a mandatory condition for reliably measuring intragroup diffuse light. The images were analyzed with the OV\\_WAV package, a wavelet technique that allows us to uncover the intragroup component in an unprecedented way. We have detected that 19, 15 and 26% of the total light of HCG 15, 35 and 51, respectively, is in the diffuse component, with colours that are compatible with old stellar populations and with mean surface brightness that can be as low as $28.4 {\\rm B mag arcsec^{-2}}$. Dynamical masses, crossing times and mass to light ratios were recalculated using the new group parameters. Also tidal features were analyzed using the wavelet technique.

  12. A Comparison of Graphical Techniques for Asymmetric Decision Problems

    E-Print Network [OSTI]

    Bielza, Concha; Shenoy, Prakash P.

    1999-11-01

    Reactor problem using each of the four techniques. For each technique, we highlight the strengths, weaknesses, and some open issues that perhaps can be resolved with further research....

  13. Evaluation of a New Ramping Technique for Duct Leakage Testing

    E-Print Network [OSTI]

    1 LBNL-61743 Evaluation of a New Ramping Technique for Duct Leakage Testing Iain S. Walker ramping Technique for Duct Leakage Testing Table of contents Introduction

  14. Validation of techniques to mitigate copper surface contamination...

    Office of Scientific and Technical Information (OSTI)

    Validation of techniques to mitigate copper surface contamination in CUORE Citation Details In-Document Search Title: Validation of techniques to mitigate copper surface...

  15. Moore Foundation Funds ALS Researchers for Promising New Technique...

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

    Moore Foundation Funds ALS Researchers for Promising New Technique for Studying Materials Moore Foundation Funds ALS Researchers for Promising New Technique for Studying Materials...

  16. New ALS Technique Guides IBM in Next-Generation Semiconductor...

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

    New ALS Technique Guides IBM in Next-Generation Semiconductor Development New ALS Technique Guides IBM in Next-Generation Semiconductor Development Print Wednesday, 21 January 2015...

  17. High Througput Combinatorial Techniques in Hydrogen Storage Materials...

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

    High Througput Combinatorial Techniques in Hydrogen Storage Materials R&D Workshop High Througput Combinatorial Techniques in Hydrogen Storage Materials R&D Workshop Summary of the...

  18. High-Throughput/Combinatorial Techniques in Hydrogen Storage...

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

    High-ThroughputCombinatorial Techniques in Hydrogen Storage Materials R&D (presentation) High-ThroughputCombinatorial Techniques in Hydrogen Storage Materials R&D (presentation)...

  19. Benchmarking Outreach and Data Collection Techniques for External...

    Energy Savers [EERE]

    Benchmarking Outreach and Data Collection Techniques for External Portfolios Benchmarking Outreach and Data Collection Techniques for External Portfolios This presentation contains...

  20. USE OF ADVANCED DATA PROCESSING TECHNIQUES IN THE IMAGING OF...

    Open Energy Info (EERE)

    data processing methods, which include Optim's proprietary nonlinear velocity optimization technique and pre-stack Kirchhoff migration. The nonlinear optimization technique...

  1. A New Particle Swarm Optimization Technique

    E-Print Network [OSTI]

    Simon, Dan

    · Particle Swarm Optimization (PSO) ­ Invented by Eberhart & Kennedy in 1995 ­ Motivated by social behavior PSO · Discrete PSO ­ Flip each bit probabilistically ­ Research has been done on benchmark functions · Individual and groups #12;9/8/2005 7 New Particle Swarm Optimization · Formulae are similar to PSO · pid

  2. Transit Users Group Supports Transit Agencies with Natural Gas Buses

    SciTech Connect (OSTI)

    Not Available

    2002-04-01

    Fact sheet describes the benefits of the Transit Users Group, which supports transit groups with compressed natural gas (CNG) buses.

  3. The Lunar Cherenkov Technique: From Parkes Onwards

    E-Print Network [OSTI]

    C. W. James; R. D. Ekers; R. A. McFadden; R. J. Protheroe

    2007-09-03

    The lunar Cherenkov technique, which aims to detect the coherent Cherenkov radiation produced when UHE particles interact in the lunar regolith, was first attempted with the Parkes radio-telescope in 1995, though the theory was not sufficiently developed at this time to calculate a limit on the UHE neutrino flux from the non-observation. Since then, the technique has evolved to include experiments utilising lower frequencies, wider bandwidths, and entire arrays of antenna. We develop a simulation to analyse the full range of experiments, and calculate the UHE neutrino flux limit from the Parkes experiment, including the directional dependence. Our results suggest a methodology for planning future observations, and demonstrate how to utilise all available information on the nature of radio pulses from the Moon for the detection of UHE particles.

  4. Active load control techniques for wind turbines.

    SciTech Connect (OSTI)

    van Dam, C.P.; Berg, Dale E.; Johnson, Scott J.

    2008-07-01

    This report provides an overview on the current state of wind turbine control and introduces a number of active techniques that could be potentially used for control of wind turbine blades. The focus is on research regarding active flow control (AFC) as it applies to wind turbine performance and loads. The techniques and concepts described here are often described as 'smart structures' or 'smart rotor control'. This field is rapidly growing and there are numerous concepts currently being investigated around the world; some concepts already are focused on the wind energy industry and others are intended for use in other fields, but have the potential for wind turbine control. An AFC system can be broken into three categories: controls and sensors, actuators and devices, and the flow phenomena. This report focuses on the research involved with the actuators and devices and the generated flow phenomena caused by each device.

  5. Economics of the Family Equilibrium Group Size and Genetic Relatedness

    E-Print Network [OSTI]

    Caraco, Thomas

    Benefits Increase Large Groups: Competitive Costs May Dominate Equilibrium Group Size Rules of Entry 1: Solitaries Decide to Enter Group Or Remain G = 1 Solitaries Enter Group at No Cost Assume r = 0 Free Entry (Overcome Territory Defense) Larger Group May Also Increase Local Competition (Cost) #12;3. Groups Reduce

  6. A Radiographic Technique With Heavy Ion Microbeams

    SciTech Connect (OSTI)

    Muscio, J.; Somacal, H.; Burlon, A. A.; Debray, M. E.; Valda, A. A.; Kreiner, A. J.; Kesque, J. M.; Minsky, D. M.

    2007-02-12

    In this work, we introduce a new technique to perform densitometric and multielemental analysis of samples at the same time using a simple detector with heavy ion micro-beams. It consists in the simultaneous analysis of X-rays induced in the sample and in a secondary target arranged behind the specimen. The X-rays originated in the secondary target are attenuated when crossing the specimen producing a radiographic image with a monochromatic source.

  7. Selected applications of microwave radiometric techniques 

    E-Print Network [OSTI]

    Jean, Buford Randall

    1971-01-01

    of oil (=2) is much less than that of water (=80) [17]. Since the calming effect of an oil layer on a water surface tends to decrease the effective emissivity, the possibility exists for an oil spill to be "invisible" for certain frequencies, viewing... above about 30 GHz can be expected to provide an oil slick detection capability [34]. The higher fre- quencies are required because an uncontained oil spill spreads rapidly, and it is estimated that an oil pollution surveillance technique should...

  8. New characterization techniques for LSST sensors

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

    Nomerotski, A.

    2015-06-18

    Fully depleted, thick CCDs with extended infra-red response have become the sensor of choice for modern sky surveys. The charge transport effects in the silicon and associated astrometric distortions could make mapping between the sky coordinates and sensor coordinates non-trivial, and limit the ultimate precision achievable with these sensors. Two new characterization techniques for the CCDs, which both could probe these issues, are discussed: x-ray flat fielding and imaging of pinhole arrays.

  9. Category:Electromagnetic Techniques | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,Cammack Village,8199089°,AnalyticalCuttingsElectrical Techniques

  10. Spent Fuel Working Group Report. Volume 1

    SciTech Connect (OSTI)

    O`Toole, T.

    1993-11-01

    The Department of Energy is storing large amounts of spent nuclear fuel and other reactor irradiated nuclear materials (herein referred to as RINM). In the past, the Department reprocessed RINM to recover plutonium, tritium, and other isotopes. However, the Department has ceased or is phasing out reprocessing operations. As a consequence, Department facilities designed, constructed, and operated to store RINM for relatively short periods of time now store RINM, pending decisions on the disposition of these materials. The extended use of the facilities, combined with their known degradation and that of their stored materials, has led to uncertainties about safety. To ensure that extended storage is safe (i.e., that protection exists for workers, the public, and the environment), the conditions of these storage facilities had to be assessed. The compelling need for such an assessment led to the Secretary`s initiative on spent fuel, which is the subject of this report. This report comprises three volumes: Volume I; Summary Results of the Spent Fuel Working Group Evaluation; Volume II, Working Group Assessment Team Reports and Protocol; Volume III; Operating Contractor Site Team Reports. This volume presents the overall results of the Working Group`s Evaluation. The group assessed 66 facilities spread across 11 sites. It identified: (1) facilities that should be considered for priority attention. (2) programmatic issues to be considered in decision making about interim storage plans and (3) specific vulnerabilities for some of these facilities.

  11. 2008 Nature Publishing Group NEWS & VIEWS

    E-Print Network [OSTI]

    , standard semiconductor processing techniques could, perhaps, pattern graphene into `nanoribbons of graphene -- individual layers of graphite in which each carbon atom is bonded to three other carbon atoms magnetic fields and ultralow temperatures, suggest that graphene-based devices might perform well enough

  12. Vacuum Structure and Boundary Renormalization Group

    E-Print Network [OSTI]

    M. Asorey; J. M. Munoz-Castaneda

    2007-12-28

    The vacuum structure is probed by boundary conditions. The behaviour of thermodynamical quantities like free energy, boundary entropy and entanglement entropy under the boundary renormalization group flow are analysed in 2D conformal field theories. The results show that whereas vacuum energy and boundary entropy turn out to be very sensitive to boundary conditions, the vacuum entanglement entropy is independent of boundary properties when the boundary of the entanglement domain does not overlap the boundary of the physical space. In all cases the second law of thermodynamics holds along the boundary renormalization group flow.

  13. Summary of the impedance working group

    SciTech Connect (OSTI)

    Chao, A.W.

    1995-05-01

    The impedance working group concentrated on the LHC design during the workshop. They look at the impedance contributions of liner, beam position monitors, shielded bellows, experimental chambers, superconducting cavities, recombination chambers, space charge, kickers, and the resistive wall. The group concluded that the impedance budgeting and the conceptual designs of the vacuum chamber components looked basically sound. It also noted, not surprisingly, that a large amount of studies are to be carried out further, and it ventured to give a partial list of these studies.

  14. Low Luminosity Activity in Hickson Compact Groups

    E-Print Network [OSTI]

    M. A. Martinez; A. del Olmo; J. Perea; R. Coziol

    2006-11-02

    With the aim of studying the influence of environment on the nuclear activity of galaxies, we have selected a well defined sample of 65 Compact Groups of galaxies with concordant redshift in the Hickson Catalog. In this proceeding, we present the results of the classification of nuclear activity for 42 galaxies, based on newly obtained spectral observations. In this subsample, 71% of the galaxies turned out to have emission lines in their nuclei. 73% of these emission-line galaxies were found to have characteristics consistent with low luminosity AGN (LLAGN), which makes compact groups extremely rich in such objects.

  15. Dual Superconductivity in G2 group

    E-Print Network [OSTI]

    G. Cossu; M. D'Elia; A. Di Giacomo; B. Lucini; C. Pica

    2006-09-28

    We investigate the dual superconductivity mechanism in the exceptional group $G_2$. This is a centerless group (no 't Hooft flux vortices are allowed) and we check for the presence of a magnetic monopole condensate in the confined phase by measuring on the lattice a disorder parameter related to the vacuum expectation value of an operator carrying magnetic charge. The behaviour of the disorder parameter is consistent with the dual superconductor picture. A first step of an analysis on the thermodynamical properties of the theory is conducted by mean of this operator.

  16. Expansivity and Roquette Groups Alex Monnard

    E-Print Network [OSTI]

    Thévenaz, Jacques

    T of G such that IndG NG(T) Inf NG(T) NG(T)/T Def NG(T) NG(T)/T ResG NG(T)(L) = L. This theorem proves) A subgroup T of a finite group G is called expansive in G if, for every g NG(T), the NG(T)-core of the subgroup g T NG(T) T contains properly T, where we note g T for gTg-1 . (iii) A finite group G is said

  17. A Narrowband Ultrasonic Spectroscopy Technique for the Inspection of

    E-Print Network [OSTI]

    This thesis introduces a narrowband ultrasonic spectroscopy (NBUS) technique for non-destructive testing. NBUS

  18. The scale invariant generator technique for quantifying anisotropic scale invariance

    E-Print Network [OSTI]

    Lovejoy, Shaun

    The scale invariant generator technique for quantifying anisotropic scale invariance G.M. Lewisa, 1 invariant generator technique (SIG). The accuracy of the technique is tested using anisotropic multifractal characteristics. The scale invariant generator technique can pro®tably be applied to the scale invariant study

  19. Benchmarking Outreach and Data Collection Techniques for External Portfolios

    Broader source: Energy.gov [DOE]

    This presentation contains information on Benchmarking Outreach and Data Collection Techniques for External Portfolios.

  20. ON THE INERTIA GROUP OF ELLIPTIC CURVES IN THE CREMONA GROUP OF THE PLANE

    E-Print Network [OSTI]

    Blanc, Jérémy

    -Be], [dFe], [BeB], and [Bla]). In the case where K = C, the inertia groups of curves of geometric genus 2