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Sample records for nx borehole jack

  1. Estimates of in situ deformability with an NX borehole jack, Spent Fuel Test - Climax, Nevada test site

    SciTech Connect

    Patrick, W.C.; Yow, J.L. Jr.; Axelrod, M.C.

    1985-12-01

    A series of borehole modulus measurements was obtained at the Spent Fuel Test - Climax (SFT-C) facility following removal of heat sources and a subsequent 1-year cooling period. A total of 212 measurements were obtained using a standard hardrock NX borehole (Goodman) jack. The results of 64 measurements made at the site before heating were reanalyzed for comparison with the post-heat data. Modulus values were calculated from the straight-line portion of the pressure vs displacement curves. Although the deformation modulus was observed to be highly variable, models were developed to explain much of this variability. Typically, spacial effects, anisotropy, and heating effects were present. The test results indicate that the deformation modulus tended to increase in the pillars between the underground openings where temperatures increased about 10{sup 0}C above the ambient 24{sup 0}C during the SFT-C. Conversely, a decrease in modulus was observed where temperatures were near 60{sup 0}C for a three-year period. In most cases, we found the modulus values to be slightly higher for vertical than for horizontal loading. There was a tendency for the modulus to be lower near excavated openings. While this effect was not ubiquitous, it was statistically significant.

  2. An experimental study of the mechanism of failure of rocks under borehole jack loading

    NASA Technical Reports Server (NTRS)

    Van, T. K.; Goodman, R. E.

    1971-01-01

    Laboratory and field tests with an experimental jack and an NX-borehole jack are reported. The following conclusions were made: Under borehole jack loading, a circular opening in a brittle solid fails by tensile fracturing when the bearing plate width is not too small. Two proposed contact stress distributions can explain the mechanism of tensile fracturing. The contact stress distribution factor is a material property which can be determined experimentally. The borehole tensile strength is larger than the rupture flexural strength. Knowing the magnitude and orientation of the in situ stress field, borehole jack test results can be used to determine the borehole tensile strength. Knowing the orientation of the in situ stress field and the flexural strength of the rock substance, the magnitude of the in situ stress components can be calculated. The detection of very small cracks is essential for the accurate determination of the failure loads which are used in the calculation of strengths and stress components.

  3. A borehole jack for deformability, strength, and stress measurements in a 2-inch borehole

    NASA Technical Reports Server (NTRS)

    Goodman, R. E.; Hovland, H. J.; Chirapuntu, S.

    1971-01-01

    A borehole jack devised for lunar exploration is described and results of its use in simulated lunar solids are presented. A hydraulic cylinder mounted between two stiff plates acts to spread the plates apart against the borehole walls when pressured. The spreading is measured by a displacement transducer and the load is measured hydraulically. The main improvement over previous instruments is the increased stroke, which allows large deformations of the borehole. Twenty-eight pistons are used to obtain a high hydraulic efficiency, and three return pistons are also provided. Pressure-deformation curves were obtained for each test on Lunar Soil Simulant No. 2, a light gray silty basalt powder.

  4. Lightweight Jack

    NASA Technical Reports Server (NTRS)

    1996-01-01

    Under contract to Jet Propulsion Laboratory, Richard Dudgeon, Inc. developed a heavy lifting load cell system to lift segments of giant antennas in NASA's Deep Space Network. The company commercialized the technology in its Dudgeon High Pressure Ultrathin Pancake Jacks/Hydraulic Load Cells. They are ultralight and ultrathin -- a system weighing 79 pounds can lift 700 tons and can fit between points that measure fractions of an inch. They can be used for bridge weighing/lifting, heavy industrial and turbine weighing/positioning, and weighing/positioning of utilities and power plant equipment.

  5. Analysis of borehole expansion and gallery tests in anisotropic rock masses

    USGS Publications Warehouse

    Amadei, B.; Savage, W.Z.

    1991-01-01

    Closed-form solutions are used to show how rock anisotropy affects the variation of the modulus of deformation around the walls of a hole in which expansion tests are conducted. These tests include dilatometer and NX-jack tests in boreholes and gallery tests in tunnels. The effects of rock anisotropy on the modulus of deformation are shown for transversely isotropic and regularly jointed rock masses with planes of transverse isotropy or joint planes parallel or normal to the hole longitudinal axis for plane strain or plane stress condition. The closed-form solutions can also be used when determining the elastic properties of anisotropic rock masses (intact or regularly jointed) in situ. ?? 1991.

  6. Jack & the Video Camera

    ERIC Educational Resources Information Center

    Charlan, Nathan

    2010-01-01

    This article narrates how the use of video camera has transformed the life of Jack Williams, a 10-year-old boy from Colorado Springs, Colorado, who has autism. The way autism affected Jack was unique. For the first nine years of his life, Jack remained in his world, alone. Functionally non-verbal and with motor skill problems that affected his…

  7. Motorized support jack

    DOEpatents

    Haney, Steven J.; Herron, Donald Joe

    2003-05-13

    A compact, vacuum compatible motorized jack for supporting heavy loads and adjusting their positions is provided. The motorized jack includes: (a) a housing having a base; (b) a first roller device that provides a first slidable surface and that is secured to the base; (c) a second roller device that provides a second slidable surface and that has an upper surface; (d) a wedge that is slidably positioned between the first roller device and the second roller device so that the wedge is in contact with the first slidable surface and the second slidable surface; (e) a motor; and (d) a drive mechanism that connects the motor and the wedge to cause the motor to controllably move the wedge forwards or backwards. Individual motorized jacks can support and lift of an object at an angle. Two or more motorized jacks can provide tip, tilt and vertical position adjustment capabilities.

  8. Motorized support jack

    DOEpatents

    Haney, Steven J.; Herron, Donald Joe

    2001-01-01

    A compact, vacuum compatible motorized jack for supporting heavy loads and adjusting their positions is provided. The motorized jack includes: (a) a housing having a base; (b) a first roller device that provides a first slidable surface and that is secured to the base; (c) a second roller device that provides a second slidable surface and that has an upper surface; (d) a wedge that is slidably positioned between the first roller device and the second roller device so that the wedge is in contact with the first slidable surface and the second slidable surface; (e) a motor; and (d) a drive mechanism that connects the motor and the wedge to cause the motor to controllably move the wedge forwards or backwards. Individual motorized jacks can support and lift of an object at an angle. Two or more motorized jacks can provide tip, tilt and vertical position adjustment capabilities.

  9. Celebrate Ezra Jack Keats.

    ERIC Educational Resources Information Center

    Brodie, Carolyn S.

    2003-01-01

    Discusses the life of Ezra Jack Keats in relation to his children's books, both as illustrator and author. Presents extension ideas for activities and includes an annotated bibliography of his works, including videos based on Keats's work, biographies, biographical information, and Web resources. (LRW)

  10. Thomas Jack Lee

    NASA Technical Reports Server (NTRS)

    1992-01-01

    Thomas Jack Lee served as the sixth director of the Marshall Space Flight Center from July 6, 1989 to January 6, 1994. Prior to the appointment, Lee held positions as Center Deputy Director (1980 - 1989) and Spacelab Program Manager (1973 - 1980). Lee began his NASA career in July 1960 when he transferred to the newly formed MSFC from Redstone Arsenal's Army Ballistic Missile Agency.

  11. XS-1 Jack Russell

    NASA Technical Reports Server (NTRS)

    1956-01-01

    NACA High-Speed Flight Station Rocket Shop. Jack Russell, Head of the Rocket Shop preparing to do pressurization tests on the XLR-11 rocket engine. The console provided the readings for the test of the rocket engine systems. 1956 photo

  12. Jack Dymond's Deep Insights

    NASA Astrophysics Data System (ADS)

    Thomson, R. E.; Delaney, J. R.

    2004-12-01

    Most people do not know that Jack Dymond was a major influence on several aspects of current deep-sea research. Along with Margaret Leinen and Jack, we were part of the first Alvin dive program on the Endeavour hydrothermal field in 1984. Jack was working with Rick, on a sediment-trap study of the overall carbon fluxes in the vicinity of the Endeavour hydrothermal systems in an effort to address a question that Cindy Lee had posed about the overall carbon production from hydrothermal vents. At the time we were recognizing and naming many of the 20- to 40-meter-high sulfide structures in the Endeavour field (Hulk, Grotto, Dante, Dudley, Bastille), Jack commented that it was a shame that the world could not see these magnificent edifices or watch endlessly awesome black smokers. His feeling was that some vent sites should be converted to National Parks to preserve them from invasion by enthusiastic scientists, yet he clearly had the vision that the public should be given a sense of the grandeur involved locally, as well as the vastness of the 70,000-km ridge-crest system running through every ocean. Within a year we started talking about the RIDGE Program, and Jack was an early and enthusiastic participant in the design and development of RIDGE. Jack was among the first to encourage multi-disciplinary research at the hydrothermal vent sites. Recognizing that deep currents are important to vent processes, he urged physical oceanographers to work with the chemists, biologists, and geologists and was personally responsible for Rick becoming interested in studying vents. We, the co-authors of this abstract, became close friends as a result of having been introduced to each other by Jack. Several years ago, we co-authored the first paper ever written on the possible influence of hydrothermal activity on the circulation of the Europan Ocean, a paper that we here dedicate to the memory of Jack. Finally, it was in part because of Jack's conviction that the world should know

  13. Jacks--A Study of Simple Machines.

    ERIC Educational Resources Information Center

    Parsons, Ralph

    This vocational physics individualized student instructional module on jacks (simple machines used to lift heavy objects) contains student prerequisites and objectives, an introduction, and sections on the ratchet bumper jack, the hydraulic jack, the screw jack, and load limitations. Designed with a laboratory orientation, each section consists of…

  14. Jack-in-the-pulpit poisoning

    MedlinePlus

    ... this page: //medlineplus.gov/ency/article/002870.htm Jack-in-the-pulpit poisoning To use the sharing features on this page, please enable JavaScript. A Jack-in-the-pulpit is a plant belonging to ...

  15. 65th birthday Jack Steinberger

    ScienceCinema

    None

    2011-04-25

    Laudatio pour Jack Steinberger né le 25 mai 1921, à l'occasion de son 65me anniversaire et sa retraite officielle, pour sa précieuse collaboration au Cern. Néanmoins son principal activité continuera comme avant dans sa recherche au Cern. Plusieurs orateurs prennent la parole (p.ex. E.Picasso) pour le féliciter et lui rendre hommage

  16. John B. "Jack" Townshend (1927-2012)

    USGS Publications Warehouse

    Love, Jeffrey J.; Finn, Carol A.

    2012-01-01

    Jack Townshend, geophysicist and dedicated public servant, died on 13 August 2012 in Fairbanks, Alaska. He was 85. Jack's career with the federal government, most of it with the national magnetic observatory program, spanned more than six solar cycles of time, and he retired only days before his death. The duration of Jack's career encompassed an important period in the history of the advancement of our understanding of the Earth. Jack's career of contributions, his life, and his personality are worthy of retrospective celebration.

  17. Remembering Jack: A Hampshire County Summer.

    ERIC Educational Resources Information Center

    Olson, Ted

    1993-01-01

    A former counselor at a summer camp in Hampshire County (West Virginia) recalls his experiences with his campers and Jack Schaffenaker, an Appalachian "mountain man" and guitar picker. Through Jack, the campers engaged in fishing, storytelling, hiking, and folk singing, and shed some negative stereotypes about Appalachian people. (KS)

  18. 14 CFR 23.507 - Jacking loads.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 1 2012-01-01 2012-01-01 false Jacking loads. 23.507 Section 23.507 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Structure Ground Loads § 23.507 Jacking loads. (a) The airplane must...

  19. 14 CFR 23.507 - Jacking loads.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 1 2013-01-01 2013-01-01 false Jacking loads. 23.507 Section 23.507 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Structure Ground Loads § 23.507 Jacking loads. (a) The airplane must...

  20. 14 CFR 23.507 - Jacking loads.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Jacking loads. 23.507 Section 23.507 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Structure Ground Loads § 23.507 Jacking loads. (a) The airplane must...

  1. 14 CFR 23.507 - Jacking loads.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Jacking loads. 23.507 Section 23.507 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Structure Ground Loads § 23.507 Jacking loads. (a) The airplane must...

  2. 14 CFR 23.507 - Jacking loads.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Jacking loads. 23.507 Section 23.507 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Structure Ground Loads § 23.507 Jacking loads. (a) The airplane must...

  3. A note on the Goodman Jack

    USGS Publications Warehouse

    Swolfs, H.S.; Kibler, J.D.

    1982-01-01

    A Note on the Goodman Jack: Reconnaissance experiments, performed to evaluate the practical utility of the hard-rock variety of the Goodman Jack, reveal that the Hustrulid-T* correction adequately reconciles the discrepancy between the measured and true deformation modulus of the rock mass in the range of 30 to 50 gigapascals. ?? 1982 Springer-Verlag.

  4. ESF GROUND SUPPORT - PROPOSED JACKING BRACKET EVALUATION

    SciTech Connect

    Marvin D. Stine

    1996-03-28

    This calculation applies to the Constructor's design of the proposed jacking bracket for the W6 x 20 steel set. The specific features of the jacking bracket evaluated in this analysis are the shear on the bracket bolts, and the effects of the applied moment on the W6 x 20 steel set beam segment.

  5. Portable walking beam pump jack

    SciTech Connect

    Laney, R.N.

    1986-02-25

    This patent describes a portable walking beam pump jack for use in pumping liquids from an oil well. This jack consists of: an elongated frame having a longitudinal axis and front and rear ends, the frame also including first and second support seats; a towing receptacle, an axle connected transversely across the frame; ground engaging wheels connected to the axle for supporting the frame for rolling transportation; stabilizing means for securing the frame with respect to a ground location; a walking beam having a first end, a midportion and a second end, the second end being adapted for connection to a pumping rod; an engine mounted on the frame; a pair of arms counterweighted for balancing a pumping rod connected to the walking beam, a drive yoke, a support assembly foldably mounted on the frame and upon which the midportion of the walking beam is pivotally connected, the support assembly the arms and the drive yoke being foldable together, from a first, fixed position in which the walking beam arms and yoke are supported in a raised position for rocking in a pumping motion to a second, fixed position disposed downwardly and forwardly from the first fixed position and in which the walking beam arms and yoke are held in a lowered position for transportation; a front support and a hydraulic cylinder connected between the frame and the support assembly for moving the support assembly between the first, fixed position and the second fixed position.

  6. On Boreholes and PBO Borehole Strain

    NASA Astrophysics Data System (ADS)

    Gladwin, M. T.; Mee, M. W.

    2003-12-01

    Borehole tensor strainmeters (GTSM) installed in Australia and California have established a baseline of data spanning more than twenty years. The current baseline of data allows characterisation of a moderate number of instruments in a range of very different environments in a way which defines reasonable performance expectations for the upcoming PBO deployments. A generic understanding of effects which result from the process of installation of the instrument in a stressed rock mass emerges. This indicates that, provided due allowance is made for experimentally determined borehole recovery effects, the contribution of borehole strain meters more than adequately fills the observational gap between high stability/long term geodetic measurements of strain and strain rates and high resolution/high frequency seismic observations of earth deformation processes. The various strain relief processes associated with the installation procedures and borehole recovery effects associated with pre-existing stress fields will be documented. Procedures for calibration of the total borehole inclusion and for progressive removal of effects due to rock anisotropy and visco-elastic creep of the grout and rock close to the borehole from far field tectonic effects will be defined and illustrated with examples. Observed deviations from these processes will be shown to be small and consistent with otherwise observed or implied fault motions. Full details of these borehole induced processes are, however, difficult to determine in the early years following installation, particularly if there is significant tectonic activity at the time. Once quantified for each site, the effects can be robustly removed from data streams.

  7. Analysis of borehole breakouts

    SciTech Connect

    Zheng, Z.; Kemeny, J.; Cook, N. G. W.

    1989-06-10

    Boreholes drilled into rock, which is subjected to stresses that amount to a significant fraction of the strength of the rock, may cause the rock to fail adjacent to the borehole surface. Often this results in the elongation of the cross section of the borehole in the direction of the minimum principal (compressive) stress orthogonal to the borehole axis. Such breakouts are valuable indicators of the direction of the minimum compressive stress orthogonal to the axis of the borehole. Their shapes may provide information about the magnitudes of both the maximum and minimum stresses relative to the strength of the rock. Borehole breakouts also may be impediments to drilling and to in situ measurement techniques, such as hydraulic fracturing. Observations and analyses of borehole breakouts raise three important questions. First, how does the shape of the borehole breakout evolve Second, why are breakout shapes stable despite the very high compressive stress concentrations that they produce Third, how is the shape of the breakout related to the magnitudes of the stresses in the rock In this paper, extensile splitting of rock in unconfined, plane strain compression is assumed to be the process of rock failure adjacent to the circumference of the borehole, by which a breakout forms. To simulate the evolution of a borehole breakout, this process is combined with a numerical boundary element analysis of the stresses around a borehole as its cross section evolves from the originally circular shape to that of a stable breakout.

  8. Successful Pregnancy Using the NxStage Home Hemodialysis System

    PubMed Central

    Brahmbhatt, Yasmin; Ikeme, Arinze; Bhogal, Navjyot; Berghella, Vincenzo

    2016-01-01

    Pregnancy in the setting of the uremic milieu of renal disease has a lower success rate than in the normal population and is a rare event. While intensified renal replacement therapy (RRT) during pregnancy can lead to improved outcomes, most studies have focused on nocturnal hemodialysis as the main RRT in pregnancy. Although thousands of patients use the home NxStage System One short daily hemodialysis (SDHD) machine in the United States, pregnancy outcomes with this therapy are unknown. The NxStage System One uses low-volume dialysate and hence small and middle molecule clearance may differ compared to conventional therapies and affect pregnancy outcomes. We report a case of a successful conception and pregnancy using the home NxStage system. The NxStage system may provide an alternative to the more routinely used NHD or standard SDHD therapies for women of childbearing age. PMID:26949554

  9. Jack-up rig for marine drilling

    SciTech Connect

    Mueller, S. R.

    1981-05-26

    This invention relates to a mobile drilling platform of the jack -up type equipped with a special system which allows the said drilling platform to work as a drilling derrick and alternatively as a hoisting crane rig for marine service.

  10. Tropical Cyclone Jack in Satellite 3-D

    NASA Video Gallery

    This 3-D flyby from NASA's TRMM satellite of Tropical Cyclone Jack on April 21 shows that some of the thunderstorms were shown by TRMM PR were still reaching height of at least 17 km (10.5 miles). ...

  11. Connections: An Interview with Jack Beeson.

    ERIC Educational Resources Information Center

    Music Educators Journal, 1979

    1979-01-01

    Composer Jack Beeson discusses the distinctively American themes and music of his operas and comments on opera composition in general, matters of style, and the televising of opera. This article is part of a theme issue on opera. (SJL)

  12. Central Calorimeter Support Cradle Jack Failure Analysis

    SciTech Connect

    Rudland, D.L.; /Fermilab

    1987-04-10

    The Central Calorimeter and its support cradle are to be supported by either hydraulic or mechanical jacks. If hydraulics are used, each support will use two hydraulically coupled jacks with two out of the four supports hydraulically coupled giving the effect of a three point support system. If mechanical jacks are used, all four points are used for support. Figure 2 shows two examples of jack placement on a 3.5 inch support plate. These two support scenarios lead to five jack failure cases to be studied. This report deals with the way in which a 0.25 inch drop (failed jack) at one support affects the stresses in the cradle. The stresses from each failure case were analyzed in two ways. First, stress factors, defined as quotients of stress intensities of the failed case with respect to the static case, were generated and then, hand calculations similar to those in Engineering Note 3740.215-EN-14 were done using the reaction forces from the failed case.

  13. Superconformal field theory and Jack superpolynomials

    NASA Astrophysics Data System (ADS)

    Desrosiers, Patrick; Lapointe, Luc; Mathieu, Pierre

    2012-09-01

    We uncover a deep connection between the {N} = {1} superconformal field theory in 2 D and eigenfunctions of the supersymmetric Sutherland model known as Jack super-polynomials (sJacks). Specifically, the singular vector at level rs/2 of the Kac module labeled by the two integers r and s are given explicitly as a sum of sJacks whose indexing diagrams are contained in a rectangle with r columns and s rows. As a second compelling evidence for the distinguished status of the sJack-basis in SCFT, we find that the degenerate Whittaker vectors (Gaiotto states) can be expressed as a remarkably simple linear combination of sJacks. As a consequence, we are able to reformulate the supersymmetric version of the (degenerate) AGT conjecture in terms of the combinatorics of sJacks. The closed-form formulas for the singular vectors and the degenerate Whittaker vectors, although only conjectured in general, have been heavily tested (in some cases, up to level 33/2). Both the Neveu-Schwarz and Ramond sectors are treated.

  14. Borehole data transmission apparatus

    DOEpatents

    Kotlyar, O.M.

    1993-03-23

    A borehole data transmission apparatus is described whereby a centrifugal pump impeller(s) is used to provide a turbine stage having substantial pressure characteristics in response to changing rotational speed of a shaft for the pressure pulsing of data from the borehole through the drilling mud to the surface of the earth.

  15. Borehole data transmission apparatus

    DOEpatents

    Kotlyar, Oleg M.

    1993-01-01

    A borehole data transmission apparatus whereby a centrifugal pump impeller(s) is used to provide a turbine stage having substantial pressure characteristics in response to changing rotational speed of a shaft for the pressure pulsing of data from the borehole through the drilling mud to the surface of the earth.

  16. NX-2G : autonomous BBOBS-NX for a highly mobile broadband seismic observation at the seafloor

    NASA Astrophysics Data System (ADS)

    Shiobara, Hajime; Sugioka, Hiroko; Ito, Aki; Shinohara, Masanao

    2016-04-01

    We had developed the broadband ocean bottom seismometer (BBOBS) and its new generation system (BBOBS-NX), and, with them, several practical observations have been performed to create and establish a new category of the ocean floor broadband seismology, since 1999. Now, our BBOBS and BBOBS-NX data is proved to be at acceptable level for broadband seismic analyses. Especially, the BBOBS-NX is able to obtain the low noise horizontal data comparable to the land station in periods longer than 10 s, which is adequate for modern analyses of the mantle structure. Moreover, the BBOBS(T)-NX is under practical evaluation for the mobile tilt observation at the seafloor, which will enable dense geodetic monitoring. The BBOBS-NX system must be a powerful tool, although, the current system has intrinsic limitation in opportunity of observations due to the necessary use of the submersible vehicle for the deployment and recovery. If we can use this system with almost any kind of vessels, like as the BBOBS (self pop-up system), it should lead us a true breakthrough of seafloor observations in geodynamics. Hereafter, we call the new autonomous BBOBS-NX as NX-2G in short. There are two main problems to be cleared to realize the NX-2G system. The first one is a tilt of the sensor unit on landing, which is larger than the acceptable limit of the sensor (±8°) in 47 % after our 15 free-fall deployments of the BBOBS-NX. As we had no evidence at which moment the tilt occurred, so it was observed during the BBOBS-NX deployment in the last year by attaching a video camera and an acceleration logger those were originally developed for this purpose. The only one result shows that the tilt on landing seemed determined by the final posture of the BBOBS-NX system just before the penetration into the sediment. The second problem is a required force to extract the sensor unit from the sticky clay sediment, which was about 80 kgf in maximum with the current BBOBS-NX system from in-situ measurements

  17. PBO Borehole Strainmeters

    NASA Astrophysics Data System (ADS)

    David, M.; Hasting, M.; Jackson, M.; Dittmann, S. T.; Johnson, W.; Venator, S.; Andersen, G.; Hodgkinson, K.; Mueller, B.; Prescott, W.

    2006-12-01

    UNAVCO is a non-profit, community-based organization funded by the National Science Foundation to install and operate the geodetic component of EarthScope called the Plate Boundary Observatory (PBO). UNAVCO will install 103 borehole tensor strainmeters/seismometers and 28 borehole tiltmeters These instruments will be used to study the three-dimensional strain field resulting from deformation across the active boundary zone between the Pacific and North American plates in the western United States in hopes of increasing our understanding of the causes and mechanisms associated with earthquakes and volcanic activity. This represents almost a tripling of all installed borehole strainmeters in North America. Since the initial deployment of strainmeters in the early 1980's, borehole strainmeters have contributed valuable data at periods ranging from minutes to weeks with sensitivities two to three orders of magnitude better than continuous GPS at periods of days to weeks. Borehole strainmeters have been used to image earthquakes, slow earthquakes, creep events and volcanic eruptions in the US, Iceland and Japan. Initial PBO strainmeter deployments show promising results but there are still major hurdles to overcome in production, installation processes, data quality control, data processing and near real time delivery of calibrated strain data. PBO has made significant steps forward with the installation of 19 borehole strainmeters as of September 1st, 2006 with 28 total instruments planned by early December. In addition to strainmeters, each borehole contains a three-component geophone and a pore pressure transducer. A subset of the boreholes are also used for heat flow measurements. When completed the PBO borehole strainmeter network will be the largest network of strainmeters installed to date and one of the world's largest borehole seismic networks. These instruments will bridge the gap between seismology and space-geodetic techniques and represents the first dense

  18. Borehole seismic modeling

    NASA Astrophysics Data System (ADS)

    Zhen, Tao

    In many borehole seismic experiments, the velocity of the tube wave is higher than that of the surrounding rock shear wave. This fast tube wave creates a strong conical shear wave in the surrounding rock, similar to the Mach wave in supersonic aviation and the Cherenkov radiation in electrodynamics. Many geophysicists have tried to utilize the conical signal in VSP (vertical seismic profiling) and cross borehole data interpretation, using quasi static approximations to model the borehole effect. Two popular quasi static approximations are: the effective source array method for source borehole modeling and the squeeze strain method for receiver borehole modeling. These quasi static approximations are sensible as they qualitatively conform to Hueygen's principle and the typical wavelength of a VSP or a cross borehole seismic experiment is much larger than the borehole radius. However, they have not been quantitatively benchmarked against other non approximation method such as the frequency wave number method. The frequency wave number method is a rigorous, non approximation method for modeling straight boreholes without lengthwise variation. The boreholes may consist of many coaxial, homogeneous and axially symmetric shells. In this thesis, the results of the quasi static approximations are compared to the results obtained from the frequency wave number method. The comparison demonstrates that both the effective source array method and squeeze strain method gives the correct arrival time. The effective source array method gives incorrect amplitude and waveform for direct arrivals and tube waves due to its arbitrary assumption of the elementary source radiation pattern. The squeeze strain method gives fairly accurate amplitude and waveform for P and S direct arrivals but it fails to match the tube wave results obtained from the frequency wave number method. The omission of tube wave dispersion and amplitude loss by the quasi static approximation methods also

  19. Issues of a Computer-Aided Design of Hydraulic Jacks

    NASA Astrophysics Data System (ADS)

    Averchenkov, V. I.; Averchenkov, A. V.; Kolyakinand, V. V.; Orekhov, O. D.

    2016-04-01

    The article deals with the issues of a computer-aided design of hydraulic equipment, namely hydraulic jacks. Design principles of the hydraulic jack CAD system are described. In addition, the possibilities for the system improvement and expansion are considered.

  20. Some physical and chemical indices of the Union Jack lattice

    NASA Astrophysics Data System (ADS)

    Li, Shuli; Yan, Weigen; Tian, Tao

    2015-02-01

    The Union Jack lattice is the dual lattice of the 4.8.8 lattice. The quantum spin model with frustration and the Ising model on the Union Jack lattice have been studied extensively by physicists. In this paper, we derive the spectrum and Laplacian spectrum of the Union Jack lattice with toroidal boundary condition. As applications, we obtain the formulae of the number of spanning trees, the energy, and the Kirchhoff index of the Union Jack lattice with toroidal boundary condition.

  1. Structural Analysis Using NX Nastran 9.0

    NASA Technical Reports Server (NTRS)

    Rolewicz, Benjamin M.

    2014-01-01

    NX Nastran is a powerful Finite Element Analysis (FEA) software package used to solve linear and non-linear models for structural and thermal systems. The software, which consists of both a solver and user interface, breaks down analysis into four files, each of which are important to the end results of the analysis. The software offers capabilities for a variety of types of analysis, and also contains a respectable modeling program. Over the course of ten weeks, I was trained to effectively implement NX Nastran into structural analysis and refinement for parts of two missions at NASA's Kennedy Space Center, the Restore mission and the Orion mission.

  2. From Jack polynomials to minimal model spectra

    NASA Astrophysics Data System (ADS)

    Ridout, David; Wood, Simon

    2015-01-01

    In this note, a deep connection between free field realizations of conformal field theories and symmetric polynomials is presented. We give a brief introduction into the necessary prerequisites of both free field realizations and symmetric polynomials, in particular Jack symmetric polynomials. Then we combine these two fields to classify the irreducible representations of the minimal model vertex operator algebras as an illuminating example of the power of these methods. While these results on the representation theory of the minimal models are all known, this note exploits the full power of Jack polynomials to present significant simplifications of the original proofs in the literature.

  3. 21 CFR 133.154 - High-moisture jack cheese.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 2 2011-04-01 2011-04-01 false High-moisture jack cheese. 133.154 Section 133.154... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.154 High-moisture jack cheese. High-moisture jack cheese conforms...

  4. 21 CFR 133.154 - High-moisture jack cheese.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 2 2013-04-01 2013-04-01 false High-moisture jack cheese. 133.154 Section 133.154... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.154 High-moisture jack cheese. High-moisture jack cheese conforms...

  5. 21 CFR 133.154 - High-moisture jack cheese.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 2 2012-04-01 2012-04-01 false High-moisture jack cheese. 133.154 Section 133.154... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.154 High-moisture jack cheese. High-moisture jack cheese conforms...

  6. 21 CFR 133.154 - High-moisture jack cheese.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 2 2014-04-01 2014-04-01 false High-moisture jack cheese. 133.154 Section 133.154... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.154 High-moisture jack cheese. High-moisture jack cheese conforms...

  7. 21 CFR 133.154 - High-moisture jack cheese.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false High-moisture jack cheese. 133.154 Section 133.154 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD... Cheese and Related Products § 133.154 High-moisture jack cheese. High-moisture jack cheese conforms...

  8. 46 CFR 134.150 - Liftboat-jacking systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Liftboat-jacking systems. 134.150 Section 134.150 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS ADDED PROVISIONS FOR LIFTBOATS § 134.150 Liftboat-jacking systems. (a) For this subchapter, liftboat jacking...

  9. 46 CFR 134.150 - Liftboat-jacking systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Liftboat-jacking systems. 134.150 Section 134.150 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS ADDED PROVISIONS FOR LIFTBOATS § 134.150 Liftboat-jacking systems. (a) For this subchapter, liftboat jacking...

  10. 46 CFR 134.150 - Liftboat-jacking systems.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Liftboat-jacking systems. 134.150 Section 134.150 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS ADDED PROVISIONS FOR LIFTBOATS § 134.150 Liftboat-jacking systems. (a) For this subchapter, liftboat jacking...

  11. 46 CFR 134.150 - Liftboat-jacking systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Liftboat-jacking systems. 134.150 Section 134.150 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS ADDED PROVISIONS FOR LIFTBOATS § 134.150 Liftboat-jacking systems. (a) For this subchapter, liftboat jacking systems are vital systems and must comply with Sections...

  12. Borehole induction coil transmitter

    DOEpatents

    Holladay, Gale; Wilt, Michael J.

    2002-01-01

    A borehole induction coil transmitter which is a part of a cross-borehole electromagnetic field system that is used for underground imaging applications. The transmitter consists of four major parts: 1) a wound ferrite or mu-metal core, 2) an array of tuning capacitors, 3) a current driver circuit board, and 4) a flux monitor. The core is wound with several hundred turns of wire and connected in series with the capacitor array, to produce a tuned coil. This tuned coil uses internal circuitry to generate sinusoidal signals that are transmitted through the earth to a receiver coil in another borehole. The transmitter can operate at frequencies from 1-200 kHz and supplies sufficient power to permit the field system to operate in boreholes separated by up to 400 meters.

  13. New jacking system resolves dynamic forces in 400-ft jack up

    SciTech Connect

    Chevallier, J.; Turner, L.

    1984-08-27

    This article describes the design and operation of Trident IX a successfully applied jack up system. A summary of Trident IX's two years of operation in the Arabian Gulf and offshore West Africa is presented. The system is compared to conventional jacking systems in terms of design, operation, costs and safety. Dynamic forces at 400 ft. water depths are summarized, and design of the legs to withstand these dynamic forces and accomodate the new system are explained. Features are listed.

  14. Lively Jack-O'-Lantern Still Life

    ERIC Educational Resources Information Center

    Sanzaro, Christy

    2010-01-01

    Pumpkin carving is a favorite classroom activity. Around late October, the halls are filled with the sour smell of raw pumpkin innards, as parents, teachers and students are up to their elbows in yellowish strings and slime. These round, orange squash are transformed into jack-o'-lanterns that are placed around the school. The day after Halloween,…

  15. Jack London: The Paradox of Individualism.

    ERIC Educational Resources Information Center

    Deane, Paul

    1968-01-01

    Because of their interest in naturalism and socialism, critics often overlook the major intellectual conflict in Jack London's work: the paradox of individualism. London regards society as affecting the individual in two ways: it either promotes individuality or it demands a conformity that undermines individualism. When society fails Buck in "The…

  16. Jack Michael's Motivation

    ERIC Educational Resources Information Center

    Miguel, Caio F.

    2013-01-01

    Among many of Jack Michael's contributions to the field of behavior analysis is his behavioral account of motivation. This paper focuses on the concept of "motivating operation" (MO) by outlining its development from Skinner's (1938) notion of "drive." Conceptually, Michael's term helped us change our focus on…

  17. Jack London and the San Francisco earthquake

    USGS Publications Warehouse

    Sachs, J.S.

    1982-01-01

    After it was over, it seemed to many, and especially to eyewitnesses like Jack London, that the earthquake and fire had devastated San Francisco. However people were confident that, like the phoeniz, San Francisco would rise from the ashes and regain her palce as the "Imperial City of the West." 

  18. Loblolly Heroes: Jack Harris & Farris Ivie.

    ERIC Educational Resources Information Center

    Downing, Cassie, Ed.; McGarity, Fiona, Ed.

    2000-01-01

    This journal issue, published by Texas high school students, features interviews with two Army veterans of World War II, Jack Harris who fought the Japanese in the Pacific, and Farris Ivie who fought the Germans in Europe. The publication recounts the war experiences of the two Texas natives in their own words through a series of one-on-one…

  19. Ramond singular vectors and Jack superpolynomials

    NASA Astrophysics Data System (ADS)

    Alarie-Vézina, Ludovic; Desrosiers, Patrick; Mathieu, Pierre

    2014-01-01

    The explicit formula for the superconformal singular vectors in the Neveu-Schwarz sector has been obtained recently, via its symmetric polynomial representation, as a sum of Jack superpolynomials. Here we present the analogous, but slightly more complicated, closed-form expression for the Ramond singular vectors.

  20. The Yme jack-up with skirt foundation

    SciTech Connect

    Eide, A.; Tuen, K.A.; Baerheim, M.

    1996-12-31

    The Yme field is developed using the Maersk Giant jack-up as a permanent drilling and production platform. This paper will present the structural and geotechnical design aspect of jack-up with skirts to document this new way of utilizing jack-up structures. It will also outline the design of the riser system and installation aspects of the rig. The skirt foundation is an innovative cost effective foundation concept offering substantial opportunities for extending the use of jack-up structures compared to traditional spud-can foundations. The Yme field development would not have been economically attractive without skirted foundations on the jack-up.

  1. Microexplosions in boreholes

    NASA Astrophysics Data System (ADS)

    Moren, P.

    1983-12-01

    At present micro explosions are the only known source that provides sufficient energy for large scale (about 0.5 to 1 km) seismic crosshole measurements. Results from a test of nondestructiveness on bore-hole walls from micro explosions are summarized. From geophysical well loggings in the holes it was found that only micro explosions with yields of 100 g and greater have a measurable effect on the bore-hole walls. However, the chemical properties of the bore-hole water changed as a result of collodial carbon of the explosive paste. Geophone-recordings from a series of shots with yields in the range 5 up to 200 g showed that the recorded maximum amplitude was linearly dependent of explosion yield.

  2. Astronaut Jack Lousma taking hot bath

    NASA Technical Reports Server (NTRS)

    1973-01-01

    A closeup view of Astronaut Jack R. Lousma, Skylab 3 pilot, taking a hot bath in the crew quarters of the Orbital Workshop (OWS) of the Skylab space station cluster in Earth orbit. In deploying the shower facility, the shower curtain is pulled up from the floor and attached to the ceiling. The water comes through a push-button shower head attached to a flexible hose. Water is drawn off by a vacuum system.

  3. 'Weightless' acrylic painting by Jack Kroehnke

    NASA Technical Reports Server (NTRS)

    1987-01-01

    'Weightless' acrylic painting by Jack Kroehnke depicts STS-26 Discovery, Orbiter Vehicle (OV) 103, Mission Specialist (MS) David C. Hilmers participating in extravehicular activity (EVA) simulation in JSC Weightless Environment Training Facility (WETF) Bldg 29. In the payload bay (PLB) mockup, Hilmers, wearing extravehicular mobility unit (EMU), holds onto the mission-peculiar equipment support structure in foreground while SCUBA-equipped diver monitors activity overhead and camera operator records EVA procedures. Copyrighted art work for use by NASA.

  4. 3. Historic American Buildings Survey Jack Maley, Photographer May 31, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey Jack Maley, Photographer May 31, 1978 NORTHEAST (BACK) AND SOUTHEAST (SIDE) ELEVATIONS - Franklin Park Zoo, Elephant House, Seaver Street, Boston, Suffolk County, MA

  5. 4. Historic American Buildings Survey Jack Maley, Photographer May 31, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Jack Maley, Photographer May 31, 1978 SOUTHWEST (FRONT) AND SOUTHEAST (SIDE) ELEVATIONS - Franklin Park Zoo, Elephant House, Seaver Street, Boston, Suffolk County, MA

  6. 1. Historic American Buildings Survey Jack Maley, Photographer May 31, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Jack Maley, Photographer May 31, 1978 SOUTHWEST (FRONT) AND NORTHWEST (SIDE) ELEVATIONS - Franklin Park Zoo, Elephant House, Seaver Street, Boston, Suffolk County, MA

  7. 2. Historic American Buildings Survey Jack Maley, Photographer May 31, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Jack Maley, Photographer May 31, 1978 SOUTHWEST (FRONT) AND NORTHWEST (SIDE) ELEVATION - Franklin Park Zoo, Feline House, Seaver Street, Boston, Suffolk County, MA

  8. 3. Historic American Buildings Survey Jack Maley, Photographer May 31, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey Jack Maley, Photographer May 31, 1978 NORTHEAST (BACK) AND NORTHWEST (SIDE) ELEVATION - Franklin Park Zoo, Feline House, Seaver Street, Boston, Suffolk County, MA

  9. 2. Historic American Buildings Survey Jack Maley, Photographer May 31, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Jack Maley, Photographer May 31, 1978 NORTHEAST (BACK) AND NORTHWEST (SIDE) ELEVATIONS - Franklin Park Zoo, Elephant House, Seaver Street, Boston, Suffolk County, MA

  10. 1. Historic American Buildings Survey Jack Maley, Photographer May 31, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Jack Maley, Photographer May 31, 1978 SOUTHWEST (FRONT) AND SOUTHEAST (SIDE) ELEVATION - Franklin Park Zoo, Feline House, Seaver Street, Boston, Suffolk County, MA

  11. Piezotube borehole seismic source

    SciTech Connect

    Daley, Tom M; Solbau, Ray D; Majer, Ernest L

    2014-05-06

    A piezoelectric borehole source capable of permanent or semipermanent insertion into a well for uninterrupted well operations is described. The source itself comprises a series of piezoelectric rings mounted to an insulative mandrel internally sized to fit over a section of well tubing, the rings encased in a protective housing and electrically connected to a power source. Providing an AC voltage to the rings will cause expansion and contraction sufficient to create a sonic pulse. The piezoelectric borehole source fits into a standard well, and allows for uninterrupted pass-through of production tubing, and other tubing and electrical cables. Testing using the source may be done at any time, even concurrent with well operations, during standard production.

  12. Micro borehole drilling platform

    SciTech Connect

    1996-10-01

    This study by CTES, L.C. meets two main objectives. First, evaluate the feasibility of using coiled tubing (CT) to drill 1.0 inches-2.5 inches diameter directional holes in hard rocks. Second, develop a conceptual design for a micro borehole drilling platform (MBDP) meeting specific size, weight, and performance requirements. The Statement of Work (SOW) in Appendix A contains detailed specifications for the feasibility study and conceptual design.

  13. On Jack Hale's problem for impulsive systems

    NASA Astrophysics Data System (ADS)

    Bonotto, E. M.; Gimenes, L. P.; Souto, G. M.

    2015-07-01

    An interesting problem of Jack Hale deals with the existence of a maximal compact invariant set in discrete dynamical systems. A solution for this problem is known for locally bounded dynamical systems. Following this line of research, we consider in this paper a class of systems whose continuous dynamics are interrupted by abrupt changes of state and we present sufficient conditions to obtain the existence of a maximal compact invariant set for a system in this class. We use the theory of asymptotic compactness to get the results.

  14. Alloying of GaNxAs1-x with InNxAs1-x: A simple formula for the band gap parametrization of Ga1-yInyNxAs1-x alloys

    NASA Astrophysics Data System (ADS)

    Kudrawiec, R.

    2007-01-01

    It has been shown that the band gap energy of dilute nitride ternary alloys (Ga1-yInyNxAs1-x in this case) can be predicted by knowing the band gap energy for dilute nitride binary alloys (GaNxAs1-x and InNxAs1-x alloys in this case) and a bowing parameter. The band gap energy for GaNxAs1-x and InNxAs1-x can be calculated after the band anticrossing (BAC) model [W. Shan et al., Phys. Rev. Lett. 82, 1221 (1999)] or other formula, whereas the bowing parameter can be assumed to be the same as for the GaInAs alloy. This approach does not require the BAC parameters related to Ga1-yInyNxAs1-x and can be applied for other dilute nitride ternary alloys. The obtained band gap predictions are in good agreement with available experimental data for as-grown GaInNAs materials. It means that the proposed energy gap parametrization corresponds to the random environment of N atoms by Ga and In atoms since alloying of GaNxAs1-x with InNxAs1-x also corresponds to alloying of Ga-rich environment of N atoms (which is expected for the as-grown GaInNAs material with low indium content) with In-rich environment of N atoms (which is expected for the as-grown GaInNAs material with high indium content).

  15. Capsicum Annuum L. Lil' Pumpkin and Pepper Jack

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The USDA, ARS announces the release of two new pepper cultivars 05C37-3 (trademarked as Lil’ Pumpkin) and 05C69-12 (trademarked as Pepper Jack). Lil’ Pumpkin and Pepper Jack are intended for ornamental applications. Lil’ Pumpkin’s unique black foliage and orange pumpkin-like fruit and Pepper Jack’s ...

  16. Ice-Borehole Probe

    NASA Technical Reports Server (NTRS)

    Behar, Alberto; Carsey, Frank; Lane, Arthur; Engelhardt, Herman

    2006-01-01

    An instrumentation system has been developed for studying interactions between a glacier or ice sheet and the underlying rock and/or soil. Prior borehole imaging systems have been used in well-drilling and mineral-exploration applications and for studying relatively thin valley glaciers, but have not been used for studying thick ice sheets like those of Antarctica. The system includes a cylindrical imaging probe that is lowered into a hole that has been bored through the ice to the ice/bedrock interface by use of an established hot-water-jet technique. The images acquired by the cameras yield information on the movement of the ice relative to the bedrock and on visible features of the lower structure of the ice sheet, including ice layers formed at different times, bubbles, and mineralogical inclusions. At the time of reporting the information for this article, the system was just deployed in two boreholes on the Amery ice shelf in East Antarctica and after successful 2000 2001 deployments in 4 boreholes at Ice Stream C, West Antarctica, and in 2002 at Black Rapids Glacier, Alaska. The probe is designed to operate at temperatures from 40 to +40 C and to withstand the cold, wet, high-pressure [130-atm (13.20-MPa)] environment at the bottom of a water-filled borehole in ice as deep as 1.6 km. A current version is being outfitted to service 2.4-km-deep boreholes at the Rutford Ice Stream in West Antarctica. The probe (see figure) contains a sidelooking charge-coupled-device (CCD) camera that generates both a real-time analog video signal and a sequence of still-image data, and contains a digital videotape recorder. The probe also contains a downward-looking CCD analog video camera, plus halogen lamps to illuminate the fields of view of both cameras. The analog video outputs of the cameras are converted to optical signals that are transmitted to a surface station via optical fibers in a cable. Electric power is supplied to the probe through wires in the cable at a

  17. Borehole sealing method and apparatus

    DOEpatents

    Hartley, James N.; Jansen, Jr., George

    1977-01-01

    A method and apparatus is described for sealing boreholes in the earth. The borehole is blocked at the sealing level, and a sealing apparatus capable of melting rock and earth is positioned in the borehole just above seal level. The apparatus is heated to rock-melting temperature and powdered rock or other sealing material is transported down the borehole to the apparatus where it is melted, pooling on the mechanical block and allowed to cool and solidify, sealing the hole. Any length of the borehole can be sealed by slowly raising the apparatus in the borehole while continuously supplying powdered rock to the apparatus to be melted and added to the top of the column of molten and cooling rock, forming a continuous borehole seal. The sealing apparatus consists of a heater capable of melting rock, including means for supplying power to the heater, means for transporting powdered rock down the borehole to the heater, means for cooling the apparatus and means for positioning the apparatus in the borehole.

  18. Constructing optimal entanglement witnesses. II. Witnessing entanglement in 4Nx4N systems

    SciTech Connect

    Chruscinski, Dariusz; Pytel, Justyna

    2010-11-15

    We provide a class of optimal nondecomposable entanglement witnesses for 4Nx4N composite quantum systems or, equivalently, another construction of nondecomposable positive maps in the algebra of 4Nx4N complex matrices. This construction provides natural generalization of the Robertson map. It is shown that their structural physical approximations give rise to entanglement breaking channels.

  19. Borehole survey method and apparatus for drilling substantially horizontal boreholes

    SciTech Connect

    Trowsdale, L.S.

    1982-11-30

    A borehole survey method and apparatus are claimed for use in drilling substantially horizontal boreholes through a mineral deposit wherein a dip accelerometer, a roll accelerometer assembly and a fluxgate are disposed near the drill bit, which is mounted on a bent sub, and connected to a surface computation and display unit by a cable which extends through the drill string. The dip angle of the borehole near the drill bit, the azimuth of the borehole near the drill bit and the roll angle or orientation of the bent sub are measured and selectively displayed at the surface while the drill string is in the borehole for utilization in guiding the drill bit through the mineral deposit along a predetermined path.

  20. Borehole survey instrument

    SciTech Connect

    Sharp, H.E.; Lin, J.W. III; Macha, E.S.; Smither, M.A.

    1984-12-04

    A borehole survey instrument is provided having a meniscus type floating compass member with indicia thereon for indicating azimuth and inclination. A light source is disposed below the indicia for illuminating the indicia upward through the liquid through which the meniscus type floating compass member floats. A lens system is provided for focusing the image of the illuminated compass member upon a film disposed below the compass member. This arrangement permits the centering post for the compass member to be of minimum diameter consistent with rigidity requirements and permits a high angle compass member to indicate angles of inclination approaching ninety degrees. A multiple light bulb light source is utilized and each light bulb is mounted in a manner which permits a single light bulb to illuminate the entire compass member. A hand-held programming and diagnostic unit is provided which may be momentarily electrically mated with the borehole survey tool to input a programmed timed delay and diagnostically test both the condition of the light bulbs utilized as the illumination source and the state of the batteries within the instrument. This hand-held programmable unit eliminates all the mechanical programming switches and permits the instrument to be completely sealed from the pressure, fluids and contaminants normally found in a well bore.

  1. Advanced jack up rig breaking U.S. construction drought

    SciTech Connect

    Kelly, P.

    1997-03-10

    A new heavy duty jack up, due in mid-1998, will be able to simultaneously drill and produce wells in harsher environments and deeper water than current jack ups in the worldwide fleet. Rowan Cos. Inc.`s Gorilla V is the only mobile offshore drilling unit (MODU) currently under construction in the US. Two more enhanced Gorilla design rigs are planned before the year 2000. The enhanced Gorilla class jack up represents the most technologically advanced jack up unit constructed to date. The rigs are structurally designed to meet year-round weather challenges in the harshest geographical environments. Rising demand for drilling rigs, coupled with a dwindling fleet, is generating supply shortages around the world, particularly at the high-specification end of the market. Even increasing the historical retirement age from 20 to 25 years, rig attrition continues at a level of about 18 rigs per year. Apart from the jack up market per se, however, Rowan`s strategy in designing and building enhanced Gorillas is to improve existing jack up drilling technology and offer the versatility to operate as a drilling unit, a mobile production unit, or both simultaneously in either open water locations or alongside existing platforms. The paper discusses the market for these heavy jack-ups, the use of one on the Cohasset project in Nova Scotia, the Gorilla V and enhanced Gorillas, geographical range of use, and MOPU economics.

  2. Side hole drilling in boreholes

    NASA Technical Reports Server (NTRS)

    Collins, Jr., Earl R. (Inventor)

    1980-01-01

    Apparatus for use in a borehole or other restricted space to bore a side hole into the strata surrounding the borehole, including a flexible shaft with a drill at its end, and two trains of sheathing members that can be progressively locked together into a rigid structure around the flexible shaft as it is directed sidewardly into the strata.

  3. Des-γ-Carboxyprothrombin (DCP) and NX-DCP Expressions and Their Relationship with Clinicopathological Features in Hepatocellular Carcinoma

    PubMed Central

    Sumi, Akiko; Akiba, Jun; Ogasawara, Sachiko; Nakayama, Masamichi; Nomura, Yoriko; Yasumoto, Makiko; Sanada, Sakiko; Nakashima, Osamu; Abe, Toshi; Yano, Hirohisa

    2015-01-01

    Aim Des-γ-carboxyprothrombin (DCP) has been used as a tumor marker for hepatocellular carcinoma (HCC). Recently the DCP/NX-DCP ratio, calculated by dividing DCP by NX-DCP, has been reported useful in detecting HCC. The purpose of this study is to clarify the significance of DCP and NX-DCP expression in HCC tissues. Methods HCC and non-HCC tissue samples were obtained from 157 patients and were immunohistochemically examined for DCP and NX-DCP expression using anti-DCP antibody and anti-NX-DCP antibody. DCP and NX-DCP expression scores were calculated by multiplying staining intensity grade by percentage of stained area. Serum DCP and NX-DCP levels were determined in 89 patients. We evaluated the relationship between tumor expression, serum level, and pathomorphological findings. Results Intrahepatic metastasis (im) was significantly more frequent in cases with high DCP expression than in cases with low DCP expression. High NX-DCP expression was associated with significantly lower histological grade, and less frequent im or portal vein invasion (vp) than low NX-DCP expression. Serum DCP was correlated with DCP expression, but serum NX-DCP was not correlated with NX-DCP expression. DCP-positive (≥40 mAU/L), NX-DCP-positive (≥90 mAU/L), and DCP/NX-DCP ratio-positive (≥1.5) cases were associated with significantly larger tumor size and more frequent vp than negative cases. DCP was rarely expressed, but NX-DCP was frequently expressed in non-cancerous liver tissues. Patients with NX-DCP expression-negative tumors showed a lower survival rate than those with NX-DCP expression-positive tumors (p = 0.04), whereas the survival in serum NX-DCP-positive cases was lower than that of serum negative cases (p = 0.02). Conclusions DCP and NX-DCP were produced in HCC tissues, but differed in expression level and biological properties. DCP expression, serum DCP or NX-DCP level, and DCP/NX-DCP ratio were closely related to malignant properties of HCC. PMID:25739032

  4. Detail view southwest of miter gear; note crane jack to ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail view southwest of miter gear; note crane jack to right - miter and rack and pinion center top with universal joint at left. - Naval Base Philadelphia-Philadelphia Naval Shipyard, 350-Ton Hammerhead Crane, League Island, Philadelphia, Philadelphia County, PA

  5. 2. EAST SIDE OF SLAVE QUARTERS (Jack E. Boucher, photgrapher, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. EAST SIDE OF SLAVE QUARTERS (Jack E. Boucher, photgrapher, April/May, 1986) - Felix & Odile Pratt Valle Slave Quarters, Southeast corner of Merchant & Second Streets, Sainte Genevieve, Ste. Genevieve County, MO

  6. 17. INTERIOR, INSPECTION PITS, OVERHEAD CRANE SUPPORT AND CAR JACKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. INTERIOR, INSPECTION PITS, OVERHEAD CRANE SUPPORT AND CAR JACKING PADS, FACING EAST - Delaware, Lackawanna & Western Railroad Freight & Rail Yard, Multiple Unit Light Inspection Shed, New Jersey Transit Hoboken Terminal Rail Yard, Hoboken, Hudson County, NJ

  7. 2. Historic American Buildings Survey Jack E. Boucher for CFA, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Jack E. Boucher for CFA, 1970 STAIR DETAIL AT FIRST- SECOND- FLOOR LEVEL - Wilkins House, 1700 Massachusetts Avenue Northwest, Washington, District of Columbia, DC

  8. 1. Historic American Buildings Survey Jack E. Boucher, for CFA, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Jack E. Boucher, for CFA, 1970 SOUTHEAST CORNER AND MASSACHUSETTS AVE., FACADE - Clarence Moore House, 1746 Massachusetts Avenue Northwest, Washington, District of Columbia, DC

  9. 3. Jack Boucher, photographer, July 1971. Scenic view along river ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Jack Boucher, photographer, July 1971. Scenic view along river showing Erie railroad line, taken from Rt. 97 at Hawks Nest, New York. - Erie Railway, New Jersey, New York, Pennsylvania, Deposit, Broome County, NY

  10. VIEW OF THE JACKING, ELEVATING, AND LEVELING SKID. Cape ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF THE JACKING, ELEVATING, AND LEVELING SKID. - Cape Canaveral Air Force Station, Launch Complex 39, Crawler Transporters, Launcher Road, East of Kennedy Parkway North, Cape Canaveral, Brevard County, FL

  11. IR spectra of ICPCVD SiNx thin films for MEMS structures

    NASA Astrophysics Data System (ADS)

    Rudakov, G.; Reshetnikov, I.

    2015-11-01

    Optical properties of non-stoichiometric silicon nitride (SiNx) films for thermo sensitive membranes of microelectromechanical systems (MEMS) and microoptomechanical systems (MOMS) has been studied applying infrared (IR) spectroscopy. For the structures SiNx/Si and (thin metal layer)/SiNx/Si transmission and reflection spectra in the region of wave numbers of 500-7000 cm-1 has been investigated. For the investigated structures analysis of optical properties observed in the IR spectra both in the form of selective absorption bands and interference modulation of a baseline was conducted.

  12. Pump jack system for oil well

    SciTech Connect

    Camren, V.

    1984-06-19

    A pump jack system is claimed for an oil well comprising a walking beam having one end connected to a vertical pump rod while being pivoted intermediate its ends for rocking movement by means of a single vertical connecting arm driven through an eccentric connection to a cushioned wheel, preferably a pneumatic tire. The latter is driven by a motor through pulley and sprocket members which provide speed reduction to a horizontal drive shaft that engages across the surface of the wheel to drive the same. The other end of the walking beam is provided with weights slidable along the beam into adjusted positions for counterbalancing the forces imposed on the beam through the pump rod. The wheel is also suitably weighted to counterbalance the weight of the connecting arm and its bearing on the wheel. To automatically deenergize the motor when the pump rod is jammed in the well, a limit switch assembly is mounted on the beam adjacent the end at which the pump rod is located. The motor and its drive train to the wheel, are mounted on the same support structure to permit easy removal and replacement as a unit.

  13. Digital development of products with NX9 for academical areas

    NASA Astrophysics Data System (ADS)

    Goanta, A. M.

    2015-11-01

    International competitiveness forced the manufacturing enterprises to look for new ways to accelerate the development of digital products through innovation, global alliances and strategic partnerships. In an environment of global research and development of distributed geographically, all members of the joint teams made up of companies and universities need to access updated and accurate information about products created by any of the type employed, student, teacher. Current design processes involve more complex products consisting of elements of design created by multiple teams, disciplines and suppliers using independent CAD systems. Even when using a 3D CAD mature technology, many companies fail to significantly reduce losses in the process, improve product quality or product type to ensure successful innovations to market arouse interest. These challenges require a radical rethinking of the business model, which belongs to the field of design, which must be based on digital development of products based on integrated files. Through this work, the author has proposed to provide both synthesis and transformations brought news of the integrated NX [1, 2, 3] from Siemens PLM Software 9, following a news results detailed documentary study, and personal results obtained by applying the same version, the digital and integrated development of a product type device test beams. Based on educational license received for NX 9 was made a detailed study of the innovations made by this release, and the application of some of them went to graphical modelling and getting all the documentation of a test device bearing beams. Also, were synthesized in terms of methodology, the steps to take to obtain graphical documentation. The results consist of: 3D models of all parts and assembly 3D model of the three-dimensional constraints of all component parts and not least respectively all drawings and assembly drawing. The most important consequence of the paper is the obtaining of

  14. JACK - ANTHROPOMETRIC MODELING SYSTEM FOR SILICON GRAPHICS WORKSTATIONS

    NASA Technical Reports Server (NTRS)

    Smith, B.

    1994-01-01

    JACK is an interactive graphics program developed at the University of Pennsylvania that displays and manipulates articulated geometric figures. JACK is typically used to observe how a human mannequin interacts with its environment and what effects body types will have upon the performance of a task in a simulated environment. Any environment can be created, and any number of mannequins can be placed anywhere in that environment. JACK includes facilities to construct limited geometric objects, position figures, perform a variety of analyses on the figures, describe the motion of the figures and specify lighting and surface property information for rendering high quality images. JACK is supplied with a variety of body types pre-defined and known to the system. There are both male and female bodies, ranging from the 5th to the 95th percentile, based on NASA Standard 3000. Each mannequin is fully articulated and reflects the joint limitations of a normal human. JACK is an editor for manipulating previously defined objects known as "Peabody" objects. Used to describe the figures as well as the internal data structure for representing them, Peabody is a language with a powerful and flexible mechanism for representing connectivity between objects, both the joints between individual segments within a figure and arbitrary connections between different figures. Peabody objects are generally comprised of several individual figures, each one a collection of segments. Each segment has a geometry represented by PSURF files that consist of polygons or curved surface patches. Although JACK does not have the capability to create new objects, objects may be created by other geometric modeling programs and then translated into the PSURF format. Environment files are a collection of figures and attributes that may be dynamically moved under the control of an animation file. The animation facilities allow the user to create a sequence of commands that duplicate the movements of a

  15. Advanced Borehole Radar for Hydrogeology

    NASA Astrophysics Data System (ADS)

    Sato, M.

    2014-12-01

    Ground Penetrating Radar is a useful tool for monitoring the hydrogeological environment. We have developed GPR systems which can be applied to these purposes, and we will demonstrate examples borehole radar measurements. In order to have longer radar detection range, frequency lower than100MHz has been normally adopted in borehole radar. Typical subsurface fractures of our interests have a few mm aperture and radar resolution is much poorer than a few cm in this frequency range. We are proposing and demonstrating to use radar polarimetry to solve this problem. We have demonstrated that a full-polarimetry borehole radar can be used for characterization of subsurface fractures. Together with signal processing for antenna characteristic compensation to equalize the signal by a dipole antenna and slot antennas, we could demonstrate that polarimetric borehole radar can estimate the surface roughness of subsurface fractures, We believe the surface roughness is closely related to water permeability through the fractures. We then developed a directional borehole radar, which uses optical field sensor. A dipole antenna in a borehole has omni-directional radiation pattern, and we cannot get azimuthal information about the scatterers. We use multiple dipole antennas set around the borehole axis, and from the phase differences, we can estimate the 3-diemnational orientation of subsurface structures. We are using optical electric field sensor for receiver of borehole radar. This is a passive sensor and connected only with optical fibers and does not require any electric power supply to operate the receiver. It has two major advantages; the first one is that the receiver can be electrically isolated from other parts, and wave coupling to a logging cable is avoided. Then, secondary, it can operate for a long time, because it does not require battery installed inside the system. It makes it possible to set sensors in fixed positions to monitor the change of environmental

  16. Research on an AlSiNx bi-material thermal-mechanical uncooled infrared FPA pixel

    NASA Astrophysics Data System (ADS)

    Zhang, Xia; Zhang, Da-cheng

    2011-08-01

    AlSiNx bi-material thermal strain structure is used in uncooled optic readout infrared focal plane array (UOR IR FPA) pixel based on Micro-Electro-Mechanical Systems (MEMS) technology. In this paper, the problems that the AlSiNxstructure prevents FPA pixel scaling down and fill factor improving, and the Au reflection layer of the pixel leads to larger readout light energy loss are analyzed. The feasibility of AlSiNx instead of AlSiNx in the UOR IR FPA fabrication is researched in detail. The theoretical analyzing and simulation results demonstrate that, with optimized thicknesses and their matching designing of SiNx and Al, the thermal-mechanical response of AlSiNx bi-material structure is improved to 1.8 times and the intensity of optic readout signal is improved to about 2 times compared with AuSiNAlSiNx one.

  17. Characterization of a rapid thermal anneal TiNxOy/TiSi2 contact barrier

    NASA Astrophysics Data System (ADS)

    Ho, V. Q.

    1989-07-01

    In this paper, the physical and electrical properties of a TiNxOy/TiSi2 dual layer contact barrier are reported. The TiNxOy/TiSi2 barrier was formed by rapidly annealing a Ti thin film on Si in an N2 ambient. During this process, the Ti film surface reacts with N2 to form a TiNxOy skin layer and the bulk of the Ti film reacts with Si to form an underlying TiSi2 layer. The influences of rapid thermal anneal (RTA) conditions on the TiNxOy layer were investigated by varying the RTA temperature from 600 to 1100° C and cycle duration from 30 to 100 s. It is found that the resulting TiNxOy and TiSi2 layer thicknesses are dependent on RTA temperature and the starting Ti thickness. For a starting Ti thickness of 500Å, 150Å thick TiNxOy and 800Å thick TiSi2 are obtained after an RTA at 900° C for 30 s. The TiNxOy thickness is limited by a fast diffusion of Si into Ti to form TiSi2. When a Ti film is deposited on SiO2, Ti starts to react with SiO2 from 600° C and a significant reduction of the SiO2 thickness is observed after an RTA at 900° C. The resulting layer is composed of a surface TiNxOy layer followed by a complex layer of titanium oxide and titanium suicide. In addition, when Ti is depos-ited on TiSi2, thicker TiNxOy and TiSi2 layers are obtained after RTA. This is because the TiSi2 layer retards the diffusion of Si from the underlying substrate into the Ti layer. NMOSFETs were fabricated using the TiNxOy/TiSi2 as a contact barrier formed by RTA at 900° C for 30 s and a significant reduction of contact resistance was obtained. In addition, electromigration test at a high current density indicated that a significant improvement in mean time to failure (MTF) has been obtained with the barrier.

  18. Soft x-ray yield from NX2 plasma focus

    SciTech Connect

    Lee, S.; Rawat, R. S.; Lee, P.; Saw, S. H.

    2009-07-15

    The Lee model code is used to compute neon soft x-ray yield Y{sub sxr} for the NX2 plasma focus as a function of pressure. Comparison with measured Y{sub sxr} shows reasonable agreement in the Y{sub sxr} versus pressure curve, the absolute maximum yield as well as the optimum pressure. This gives confidence that the code gives a good representation of the neon plasma focus in terms of gross properties including speeds and trajectories and soft x-ray yields, despite its lack of modeling localized regions of higher densities and temperatures. Computed current curves versus pressure are presented and discussed particularly in terms of the dynamic resistance of the axial phase. Computed gross properties of the plasma focus including peak discharge current I{sub peak}, pinch current I{sub pinch}, minimum pinch radius r{sub min}, plasma density at the middle duration of pinch n{sub pinch}, and plasma temperature at middle duration of pinch T{sub pinch} are presented and the trends in variation of these are discussed to explain the peaking of Y{sub sxr} at optimum pressure.

  19. Backbone NxH compounds at high pressures.

    PubMed

    Goncharov, Alexander F; Holtgrewe, Nicholas; Qian, Guangrui; Hu, Chaohao; Oganov, Artem R; Somayazulu, Maddury; Stavrou, Elissaios; Pickard, Chris J; Berlie, Adam; Yen, Fei; Mahmood, Mahmood; Lobanov, Sergey S; Konôpková, Zuzana; Prakapenka, Vitali B

    2015-06-01

    Optical and synchrotron x-ray diffraction diamond anvil cell experiments have been combined with first-principles theoretical structure predictions to investigate mixtures of N2 and H2 up to 55 GPa. Our experiments show the formation of structurally complex van der Waals compounds [see also D. K. Spaulding et al., Nat. Commun. 5, 5739 (2014)] above 10 GPa. However, we found that these NxH (0.5 < x < 1.5) compounds transform abruptly to new oligomeric materials through barochemistry above 47 GPa and photochemistry at pressures as low as 10 GPa. These oligomeric compounds can be recovered to ambient pressure at T < 130 K, whereas at room temperature, they can be metastable on pressure release down to 3.5 GPa. Extensive theoretical calculations show that such oligomeric materials become thermodynamically more stable in comparison to mixtures of N2, H2, and NH3 above approximately 40 GPa. Our results suggest new pathways for synthesis of environmentally benign high energy-density materials. These materials could also exist as alternative planetary ices. PMID:26049497

  20. Spanning Trees of the Generalised Union Jack Lattice

    NASA Astrophysics Data System (ADS)

    Chen, Lingyun; Yan, Weigen

    2016-04-01

    The Union Jack lattice UJL(n, m) with toroidal boundary condition can be obtained from an n×m square lattice with toroidal boundary condition by inserting a new vertex vf to each face f and adding four edges (vf, ui(f)), where u1(f), u2(f), u3(f), and u4(f) are four vertices on the boundary of f. The Union Jack lattice has been studied extensively by statistical physicists. In this article, we consider the problem of enumeration of spanning trees of the so-called generalised Union Jack lattice UDn, which is obtained from the Aztec diamond ADnt of order n with toroidal boundary condition by inserting a new vertex vf to each face f and adding four edges (vf, ui(f)), where u1(f), u2(f), u3(f) and u4(f) are four vertices on the boundary of f.

  1. Progress in inflammatory neuropathy -the legacy of Dr Jack Griffin.

    PubMed

    Feldman, Eva L; Hughes, Richard A C; Willison, Hugh J

    2015-11-01

    The past quarter of a century has brought incredible advances in our understanding of inflammatory neuropathies, and the insights into Guillain-Barré syndrome (GBS) began in the 1990s with the seminal work of Dr Jack Griffin and his colleagues. In this essay, we provide a tribute to Jack, and review the recent progress in a field that he termed his personal favourite. In particular, we discuss the new developments in our understanding and diagnosis of inflammatory neuropathies, the recent emergence of the node of Ranvier and the paranode as sites of intensive investigation, and the mechanistic evidence that is providing a platform for therapeutic development studies. PMID:26458287

  2. 4. Unit 4 Turbine Pit Oil Jacking Pump and Wicket ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Unit 4 Turbine Pit Oil Jacking Pump and Wicket Gate Linkages, view to the north. The jacking pump, located along the wall on the left side of photograph, is used for pumping oil to lift the thrust bearing prior to starting the unit. Note the wicket gate linkages attached to the operating ring and visible in the lower center of the photograph. - Washington Water Power Clark Fork River Cabinet Gorge Hydroelectric Development, Powerhouse, North Bank of Clark Fork River at Cabinet Gorge, Cabinet, Bonner County, ID

  3. Integrability and Transition Coefficients Related to Jack Polynomials

    NASA Astrophysics Data System (ADS)

    Liu, Zhi-Sheng; Xu, Ying-Ying; Yu, Ming

    2014-05-01

    Integrability plays a central role in solving many body problems in physics. The explicit construction of the Jack polynomials is an essential ingredient in solving the Calogero—Sutherland model, which is a one-dimensional integrable system. Starting from a special class of the Jack polynomials associated to the hook Young diagram, we find a systematic way in the explicit construction of the transition coefficients in the power-sum basis, which is closely related to a set of mutually commuting operators, i.e. the conserved charges.

  4. Psychoanalysis of Jack London's "The Call of the Wild" and "White Fang"

    ERIC Educational Resources Information Center

    Yang, Hongyan

    2015-01-01

    "The Call of the Wild" and "White Fang" both are masterpieces of Jack London. The protagonists Buck and White Fang are the incarnation of Jack himself to some extent for the two novels reveal a great deal of the writer. This essay aims at psychoanalyzing Jack London's creative process, the Oedipus complex and the confliction…

  5. The geographic distribution and complex evolutionary history of the NX-2 trichothecene chemotype from Fusarium graminearum.

    PubMed

    Kelly, Amy; Proctor, Robert H; Belzile, Francois; Chulze, Sofia N; Clear, Randall M; Cowger, Christina; Elmer, Wade; Lee, Theresa; Obanor, Friday; Waalwijk, Cees; Ward, Todd J

    2016-10-01

    Fusarium graminearum and 21 related species comprising the F. sambucinum species complex lineage 1 (FSAMSC-1) are the most important Fusarium Head Blight pathogens of cereal crops world-wide. FSAMSC-1 species typically produce type B trichothecenes. However, some F. graminearum strains were recently found to produce a novel type A trichothecene (NX-2) resulting from functional variation in the trichothecene biosynthetic enzyme Tri1. We used a PCR-RFLP assay targeting the TRI1 gene to identify the NX-2 allele among a global collection of 2515 F. graminearum. NX-2 isolates were only found in southern Canada and the northern U.S., where they were observed at low frequency (1.8%), but over a broader geographic range and set of cereal hosts than previously recognized. Phylogenetic analyses of TRI1 and adjacent genes produced gene trees that were incongruent with the history of species divergence within FSAMSC-1, indicating trans-species evolution of ancestral polymorphism. In addition, placement of NX-2 strains in the TRI1 gene tree was influenced by the accumulation of nonsynonymous substitutions associated with the evolution of the NX-2 chemotype, and a significant (P<0.001) change in selection pressure was observed along the NX-2 branch (ω=1.16) in comparison to other branches (ω=0.17) in the TRI1 phylogeny. Parameter estimates were consistent with positive selection for specific amino-acid changes during the evolution of NX-2, but direct tests of positive selection were not significant. Phylogenetic analyses of fourfold degenerate sites and intron sequences in TRI1 indicated the NX-2 chemotype had a single evolutionary origin and evolved recently from a type B ancestor. Our results indicate the NX-2 chemotype may be indigenous, and possibly endemic, to southern Canada and the northern U.S. In addition, we demonstrate that the evolution of TRI1 within FSAMSC-1 has been complex, with evidence of trans-species evolution and chemotype-specific shifts in selective

  6. Maine Geological Survey Borehole Temperature Profiles

    DOE Data Explorer

    Marvinney, Robert

    2013-11-06

    This dataset includes temperature profiles from 30 boreholes throughout Maine that were selected for their depth, location, and lithologies encountered. Depths range from about 300 feet to 2,200 feet. Most of the boreholes selected for measurement were completed in granite because this lithology can be assumed to be nearly homogeneous over the depth of the borehole. Boreholes were also selected to address gaps in existing geothermal datasets. Temperature profiles were collected in October and November, 2012.

  7. The potential for NX-1207 in benign prostatic hyperplasia: an update for clinicians

    PubMed Central

    Cowan, Barrett

    2011-01-01

    Lower urinary tract symptoms associated with benign prostatic hyperplasia (BPH) affect many older men and can have a significant impact on health-related quality of life. BPH is a progressive condition that may lead to complications including acute urinary retention. There exists an unmet need for a safe and effective, office-based, catheter-free therapy for BPH patients. NX-1207 is a promising first-in-class drug currently in phase III trials for the treatment of BPH. This review provides an overview of the NX-1207 trial program and considers its potential application for patients with symptoms related to BPH. NX-1207 is administered as an office-based procedure by transrectal intraprostatic injection under ultrasound guidance. NX-1207 has selective pro-apoptotic properties, which induce focal cell loss in prostate tissue, leading to prostate volume reduction with both short- and long-term symptomatic improvement. In four US clinical trials to date, NX-1207 has shown evidence of symptomatic improvement substantially better than currently approved BPH medications with no significant safety issues. Larger phase III trials are ongoing to confirm further the efficacy, safety, and tolerability for this minimally invasive, anesthetic-free, clinic-based treatment for BPH. PMID:23251763

  8. Downhole Imaging With Borehole Radar

    NASA Astrophysics Data System (ADS)

    Fokkema, J. T.; van den Berg, P. M.; van Dongen, K. W. A.; Luthi, S. M.

    We describe a directional borehole radar system. The antennas are positioned in a bi-static set-up. In order to obtain a focused radiation pattern, the transmitting and receiving dipoles are shielded with a curved reflector. The radiation pattern of this scattered wavefield is computed by solving the integral equation for the unknown elec- tric surface current at the conducting surface. Based on these numerical simulations, a prototype was built. The effective radiation pattern is in good agreement with the computed pattern. We also present a three-dimensional imaging method for this bore- hole radar. The computed radiation pattern is used in such a way that deconvolution for the angular radiation pattern can be applied. Data from preliminary laboratory and field tests under controlled conditions are promising. The applications of this method include the detection of unexploded ordinance from boreholes, the detection of objects and layers in tunnels, and the determination of the diameter of concrete columns in the Jetgrout Diameter System. With appropriate modifications, this system may be appli- cable in the oil- and gas industry for the detection of layers and fractures in borehole. It covers a gap between conventional logging measurements in boreholes, and seismic surface surveys.

  9. 30 CFR 75.1322 - Stemming boreholes

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Stemming boreholes 75.1322 Section 75.1322... MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1322 Stemming boreholes (a) Only noncombustible material shall be used for stemming boreholes. (b) Stemming materials other...

  10. Waste Isolation Pilot Plant borehole data

    SciTech Connect

    1995-04-01

    Data pertaining to all the surface boreholes used at the WIPP site for site characterization hydrological testing and resource evaluation exist in numerous source documents. This project was initiated to develop a comprehensive data base that would include the data on all WIPP related surface boreholes from the Atomic Energy Commission, Waste Isolation Pilot Plant Energy Research and Development Administration, Department of Energy, and Hydrologic Test Borehole Programs. The data compiled from each borehole includes: operator, permit number, location, total depth, type of well, driller, drilling record, casing record, plugging schedule, and stratigraphic summary. There are six groups of boreholes contained in this data base, they are as follows: Commercially Drilled Potash Boreholes, Energy Department Wells, Geologic Exploration Boreholes, Hydrologic Test Boreholes, Potash Boreholes, and Subsurface Exploration Boreholes. There were numerous references which contained borehole data. In some cases the data found in one document was inconsistent with data in another document. In order to ensure consistency and accuracy in the data base, the same references were used for as many of the boreholes as possible. For example, all elevations and locations were taken from Compilation and Comparison of Test-Hole Location Surveys in the Vicinity of the WIPP Site. SAND 88-1065, Table 3-5. There are some sections where a data field is left blank. In this case, the information was either not applicable or was unavailable.

  11. 30 CFR 75.1322 - Stemming boreholes.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Stemming boreholes. 75.1322 Section 75.1322... MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1322 Stemming boreholes. (a) Only noncombustible material shall be used for stemming boreholes. (b) Stemming materials other...

  12. 30 CFR 75.1322 - Stemming boreholes.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Stemming boreholes. 75.1322 Section 75.1322... MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1322 Stemming boreholes. (a) Only noncombustible material shall be used for stemming boreholes. (b) Stemming materials other...

  13. 30 CFR 75.1322 - Stemming boreholes

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Stemming boreholes 75.1322 Section 75.1322... MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1322 Stemming boreholes (a) Only noncombustible material shall be used for stemming boreholes. (b) Stemming materials other...

  14. 30 CFR 75.1322 - Stemming boreholes

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Stemming boreholes 75.1322 Section 75.1322... MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1322 Stemming boreholes (a) Only noncombustible material shall be used for stemming boreholes. (b) Stemming materials other...

  15. Detecting a fluid-filled borehole using elastic waves from a remote borehole.

    PubMed

    Tang, Xiaoming; Cao, Jingji; Li, Zhen; Su, Yuanda

    2016-08-01

    The interaction of a fluid-filled borehole with incident elastic waves is an important topic for downhole acoustic measurements. By analyzing the wave phenomena of this problem, one can simulate the detection of a borehole target using a source-receiver system in a remote borehole. The analysis result shows that the wave signals from the target borehole are of sufficient amplitude even though the borehole size is small compared to wavelength. Consequently, the target borehole can be detected when the two boreholes are far away from each other. The result can be utilized to provide a method for testing downhole acoustic imaging tools. PMID:27586782

  16. Gravity base, jack-up platform - method and apparatus

    SciTech Connect

    Herrmann, R.P.; Pease, F.T.; Ray, D.R.

    1981-05-05

    The invention relates to an offshore, gravity base, jack-up platform comprising a deck, a gravity base and one or more legs interconnecting the deck and base. The gravity base comprises a generally polygonal shaped, monolithic hull structure with reaction members extending downwardly from the hull to penetrate the waterbed and react to vertical and lateral loads imposed upon the platform while maintaining the gravity hull in a posture elevated above the surface of the waterbed. A method aspect of the invention includes the steps of towing a gravity base, jack-up platform, as a unit, to a preselected offshore site floating upon the gravity hull. During the towing operation, the deck is mounted adjacent the gravity base with a leg or legs projecting through the deck. At a preselected offshore station ballast is added to the gravity base and the platform descends slightly to a posture where the platform is buoyantly supported by the deck. The base is then jacked down toward the seabed and the platform is laterally brought onto station. Ballast is then added to the deck and the reaction members are penetrated into the waterbed to operational soil refusal. Ballast is then ejected from the deck and the deck is jacked to an operational elevation above a predetermined statistical wave crest height.

  17. 9. Historic American Buildings Survey; Jack E. Boucher, photographer; Sept. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Historic American Buildings Survey; Jack E. Boucher, photographer; Sept. 1969 Copy of measured drawing, 1st floor plan, 1925 (From file of Wash. D.C. Board of Education, office of buildings and grounds) - Jackson (Public) School, R Street & Avon Place Northwest, Washington, District of Columbia, DC

  18. Filling Holes with Words: An Interview with Jack Gantos.

    ERIC Educational Resources Information Center

    Shoemaker, Joel

    2003-01-01

    This interview with Jack Gantos, an author who writes books for young adults, focuses on how he uses his own personal experiences in his books. Discusses memories of his father and his childhood, drug-smuggling activities and the resulting jail time, and student reactions to his books. (LRW)

  19. Astronaut Jack Lousma with part of Inflight Medical Support System

    NASA Technical Reports Server (NTRS)

    1973-01-01

    Astronaut Jack R. Lousma, Skylab 3 pilot, reaches into a medical kit, part of the Inflight Medical Support System (IMSS), during training for the second manned Skylab Earth-orbital mission. This activity took place in the Orbital Workshop (OWS) trainer in the Mission Simulation and Training Facility at JSC.

  20. Developing Political Activism Awareness: An Interview with Jack Trammell

    ERIC Educational Resources Information Center

    Shetron, Tamara Harper

    2013-01-01

    This article presents an interview with Jack Trammell, whose contributions in the field of education have encompassed a variety of areas with one common denominator: equal access to higher education for all. He serves as the director of Disability Support Services at Randolph-Macon College in Ashland, Va, where he is also an assistant professor,…

  1. Astronaut Jack Lousma egresses Skylab 3 Command Module

    NASA Technical Reports Server (NTRS)

    1973-01-01

    Astronaut Jack R. Lousma, Skylab 3 pilot, egresses the Skylab 3 Command Module aboard the prime recovery ship, U.S.S. New Orleans, during recovery operations in the Pacific Ocean. Note surgical masks on those assisting Lousma. This is to prevent the astronauts from contracting infections.

  2. Jack Colby Continues Stellar Legacy of APPA Fellows

    ERIC Educational Resources Information Center

    Thaler-Carter, Ruth E.

    2011-01-01

    This article profiles 2011 APPA Fellow Jack K. Colby, assistant vice chancellor for facilities operations at North Carolina State University. Colby has a history of nonstop service to his profession and to APPA that makes that ever-active, never-stop rabbit look like a piker. Like previous APPA Fellows, Colby could easily rest on his laurels of…

  3. Astronaut Jack Lousma works at Multispectral camera experiment

    NASA Technical Reports Server (NTRS)

    1973-01-01

    Astronaut Jack R. Lousma, Skylab 3 pilot, works at the S190A multispectral camera experiment in the Multiple Docking Adapter (MDA), seen from a color television transmission made by a TV camera aboard the Skylab space station cluster in Earth orbit. Lousma later used a small brush to clean the six lenses of the multispectral camera.

  4. Astronaut Jack Lousma doing acrobatics in OWS dome area

    NASA Technical Reports Server (NTRS)

    1973-01-01

    Astronaut Jack R. Lousma, Skylab 3 pilot, doing acrobatics in the dome area of the Orbital Workshop (OWS) on the space station cluster in Earth orbit. The dome area is about 22 feet in diameter and 19 feet from top to bottom.

  5. 8. Historic American Buildings Survey, Jack E. Boucher, from Walling's ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Historic American Buildings Survey, Jack E. Boucher, from Walling's Map of Providence County, R.I., in the collection of the Library of Congress, PHOTOCOPY OF 1851 WOODCUT OF THE WOONSOCKET COMPANY'S MILLS. - Woonsocket Company, Number 1 Mill, 100 Front Street, Woonsocket, Providence County, RI

  6. 46 CFR 134.150 - Liftboat-jacking systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... are vital systems and must comply with Sections 4/1.13.1 through 4/1.13.3 of the ABS's “Rules for... 128 of this subchapter. (b) Each control system for a liftboat jacking system must be designed so that loss of power, loss of pressure in the hydraulic system, or low hydraulic-fluid level will activate...

  7. Pentagon After Action Reports: The Jack Taylor Debate.

    ERIC Educational Resources Information Center

    Abbott, Stan

    In requesting after action reports--Pentagon-prepared summaries of interviews between reporters and Pentagon officials--investigative reporter Jack Taylor both aroused Pentagon opposition and created a rift between the Pentagon press corps and outside reporters. To investigate whether the full-time Pentagon press corps was reporting as…

  8. 7. Photocopy by Jack Boucher, VIEW OF FORT TOTTEN, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Photocopy by Jack Boucher, VIEW OF FORT TOTTEN, LOOKING NORTHWEST, 1880s. Original photograph at State Historical Society of North Dakota, file No. B 370 - Fort Totten, 12 miles southwest of Devils Lake City off Route 57, Devils Lake, Ramsey County, ND

  9. NxStage dialysis system-associated thrombocytopenia: a report of two cases.

    PubMed

    Sekkarie, Mohamed; Waldron, Michelle; Reynolds, Texas

    2016-01-01

    Thrombocytopenia in hemodialysis patients has recently been reported to be commonly caused by electron-beam sterilization of dialysis filters. We report the occurrence of thrombocytopenia in the first two patients of a newly established home hemodialysis program. The 2 patients switched from conventional hemodialysis using polysulfone electron-beam sterilized dialyzers to a NxStage system, which uses gamma sterilized polyehersulfone dialyzers incorporated into a drop-in cartridge. The thrombocytopenia resolved after return to conventional dialysis in both patients and recurred upon rechallenge in the patient who opted to retry NxStage. This is the first report of thrombocytopenia with the NxStage system according to the authors’ knowledge. Dialysis-associated thrombocytopenia pathophysiology and clinical significance are not well understood and warrant additional investigations. PMID:26521886

  10. High performance AlGaN/GaN HEMTs with AlN/SiNx passivation

    NASA Astrophysics Data System (ADS)

    Xin, Tan; Yuanjie, Lü; Guodong, Gu; Li, Wang; Shaobo, Dun; Xubo, Song; Hongyu, Guo; Jiayun, Yin; Shujun, Cai; Zhihong, Feng

    2015-07-01

    AlGaN/GaN high electron-mobility transistors (HEMTs) with 5 nm AlN passivation by plasma enhanced atomic layer deposition (PEALD) were fabricated, covered by 50 nm SiNx which was grown by plasma enhanced chemical vapor deposition (PECVD). With PEALD AlN passivation, current collapse was suppressed more effectively and the devices show better subthreshold characteristics. Moreover, the insertion of AlN increased the RF transconductance, which lead to a higher cut-off frequency. Temperature dependence of DC characteristics demonstrated that the degradations of drain current and maximum transconductance at elevated temperatures for the AlN/SiNx passivated devices were much smaller compared with the devices with SiNx passivation, indicating that PEALD AlN passivation can improve the high temperature operation of the AlGaN/GaN HEMTs. Project supported by the National Natural Science Foundation of China (No. 60890192).

  11. NxRepair: error correction in de novo sequence assembly using Nextera mate pairs.

    PubMed

    Murphy, Rebecca R; O'Connell, Jared; Cox, Anthony J; Schulz-Trieglaff, Ole

    2015-01-01

    Scaffolding errors and incorrect repeat disambiguation during de novo assembly can result in large scale misassemblies in draft genomes. Nextera mate pair sequencing data provide additional information to resolve assembly ambiguities during scaffolding. Here, we introduce NxRepair, an open source toolkit for error correction in de novo assemblies that uses Nextera mate pair libraries to identify and correct large-scale errors. We show that NxRepair can identify and correct large scaffolding errors, without use of a reference sequence, resulting in quantitative improvements in the assembly quality. NxRepair can be downloaded from GitHub or PyPI, the Python Package Index; a tutorial and user documentation are also available. PMID:26056623

  12. Isotropic plasma etching of Ge Si and SiNx films

    DOE PAGESBeta

    Henry, Michael David; Douglas, Erica Ann

    2016-05-01

    This study reports on selective isotropic dry etching of chemically vapor deposited (CVD) Ge thin film, release layers using a Shibaura chemical downstream etcher (CDE) with NF3 and Ar based plasma chemistry. Relative etch rates between Ge, Si and SiNx are described with etch rate reductions achieved by adjusting plasma chemistry with O2. Formation of oxides reducing etch rates were measured for both Ge and Si, but nitrides or oxy-nitrides created using direct injection of NO into the process chamber were measured to increase Si and SiNx etch rates while retarding Ge etching.

  13. Formation and coarsening of near-surface Ga nanoparticles on SiNx

    NASA Astrophysics Data System (ADS)

    Canniff, J. C.; Jeon, S.; Huang, S.; Goldman, R. S.

    2015-06-01

    We have investigated the formation and coarsening of near-surface Ga nanoparticles (NPs) in SiNx using Ga+ focused-ion-beam-irradiation of SiNx, followed by rapid thermal annealing. For surfaces with minimal curvature, diffusive growth is apparent, leading to nearly close packed arrays with NP diameters as small as 3 nm and densities as high as ˜4 × 1012 cm-2. The diffusive flux increases with annealing temperature, leading to NP coarsening by Ostwald ripening. For surfaces with increased curvature, diffusion towards the valleys also increases during annealing, leading to Ga NP coalescence and a bi-modal distribution of NP sizes.

  14. Intel NX to PVM 3.2 message passing conversion library

    NASA Technical Reports Server (NTRS)

    Arthur, Trey; Nelson, Michael L.

    1993-01-01

    NASA Langley Research Center has developed a library that allows Intel NX message passing codes to be executed under the more popular and widely supported Parallel Virtual Machine (PVM) message passing library. PVM was developed at Oak Ridge National Labs and has become the defacto standard for message passing. This library will allow the many programs that were developed on the Intel iPSC/860 or Intel Paragon in a Single Program Multiple Data (SPMD) design to be ported to the numerous architectures that PVM (version 3.2) supports. Also, the library adds global operations capability to PVM. A familiarity with Intel NX and PVM message passing is assumed.

  15. Impurity-Band Model for GaP1-xNx

    SciTech Connect

    Fluegel, B.; Zhang, Y.; Geisz, J. F.; Mascarenhas, A.

    2005-11-01

    Low-temperature absorption studies on free-standing GaP1-xNx films provide direct experimental evidence that the host conduction-band minimum (CBM) near X1C does not plunge downward with increased nitrogen doping, contrary to what has been suggested recently; rather, it remains stationary for x up to 0.1%. This fact, combined with the results of earlier studies of the CBM at ..GAMMA.. and conduction-band edge near L, confirms that the giant bandgap lowering observed in GaP1-xNx results from a CBM that evolves purely from nitrogen impurity bands.

  16. MWD tool for deep, small diameter boreholes

    SciTech Connect

    Buytaert, J.P.R.; Duckworth, A.

    1992-03-17

    This patent describes an apparatus for measuring a drilling parameters while drilling a borehole in an earth formation, wherein the borehole includes a small diameter deep borehole portion and a large diameter upper borehole portion. It includes small diameter drillstring means for drilling the deep borehole portion; sensor means, disposed within the small diameter drillstring means, for measuring a drilling parameter characteristic of the deep portion of the borehole while drilling the deep portion of the borehole and for providing sensor output signals indicative of the measured parameter; an upper drillstring portion extending between the surface of the formation and the small diameter drillstring means, the upper drillstring portion including a large diameter drillstring portion; data transmission means disposed within the large diameter drillstring portion and responsive to the sensor output.

  17. Roles of SiNx layers in light trapping and carrier collection of nanostructured crystalline Si solar cells

    NASA Astrophysics Data System (ADS)

    Cho, Yunae; Kim, Eunah; Gwon, Minji; Kim, Dong-Wook; Park, Hyeong-Ho; Kim, Joondong

    We investigated optical properties and photovoltaic (PV) performance of nanostructured Si solar cells with and without SiNx dielectric layers. The SiNx layer contributed to the enhancement of internal quantum efficiency of the nanostructured cells at both short and long wavelengths. In contrast, the surface passivation of SiNx layers on flat cells helped the carrier collection mainly at short wavelength. The surface nanopatterned array enhanced the optical absorption and also concentrated incoming light near the surface in broad wavelength range, revealed by experimental data and optical simulation results. As a result, the nanostructured cells had high density of photo-generated carriers near the surface. This could lead to significant recombination loss of the cells without SiNx layers. Our work suggested that the SiNx layer played a crucial role in the improved carrier collection of the nanostructured Si PV devices.

  18. Borehole Effects in Triaxial Induction Logging

    SciTech Connect

    Bertete-Aguirre, H; Cherkaev, E; Tripp, A

    2000-09-15

    Traditional induction tools use source arrays in which both receiving and transmitting magnetic dipoles are oriented along the borehole axis. This orientation has been preferred for traditional isotropic formation evaluation in vertical boreholes because borehole effects are minimized by the source-receiver-borehole symmetry. However, this source-receiver geometry tends to minimize the response of potentially interesting geological features? such as bed resistivity anisotropy and fracturing which parallels the borehole. Traditional uniaxial tool responses are also ambiguous in highly deviated boreholes in horizontally layered formations. Resolution of these features would be enhanced by incorporating one or more source transmitters that are perpendicular to the borehole axis. Although these transmitters can introduce borehole effects, resistive oil-based muds minimize borehole effects for horizontal source data collection and interpretation. However, the use of oil based muds is contraindicated in environmentally sensitive areas. For this reason, it is important to be able to assess the influence of conductive water based muds on the new generation of triaxial induction tools directed toward geothermal resource evaluation and to develop means of ameliorating any deleterious effects. The present paper investigates the effects of a borehole on triaxial measurements. The literature contains a great deal of work on analytic expressions for the EM response of a magnetic dipole contained in a borehole with possible invasion zones. Moran and Gianzero (1979) for example investigate borehole effects using such an expression. They show that for conductive borehole fluids, the borehole response can easily swamp the formation response for horizontal dipoles. This is also true when the source dipoles are enclosed in a resistive cavity, as shown by Howard (1981) using a mode match modeling technique.

  19. Slant Borehole Demonstration Summary Report

    SciTech Connect

    GARDNER, M.G.

    2000-07-19

    This report provides a summary of the demonstration project for development of a slant borehole to retrieve soil samples from beneath the SX-108 single-shell tank. It provides a summary of the findings from the demonstration activities and recommendations for tool selection and methods to deploy into the SX Tank Farm. Daily work activities were recorded on Drilling and Sampling Daily Work Record Reports. The work described in this document was performed during March and April 2000.

  20. Electromagnetic fields in cased borehole

    SciTech Connect

    Lee, Ki Ha; Kim, Hee Joon; Uchida, Toshihiro

    2001-07-20

    Borehole electromagnetic (EM) measurements, using fiberglass-cased boreholes, have proven useful in oil field reservoir characterization and process monitoring (Wilt et al., 1995). It has been presumed that these measurements would be impossible in steel-cased wells due to the very large EM attenuation and phase shifts. Recent laboratory and field studies have indicated that detection of EM signals through steel casing should be possible at low frequencies, and that these data provide a reasonable conductivity image at a useful scale. Thus, we see an increased application of this technique to mature oilfields, and an immediate extension to geothermal industry as well. Along with the field experiments numerical model studies have been carried out for analyzing the effect of steel casing to the EM fields. The model used to be an infinitely long uniform casing embedded in a homogeneous whole space. Nevertheless, the results indicated that the formation signal could be accurately recovered if the casing characteristics were independently known (Becker et al., 1998; Lee el al., 1998). Real steel-cased wells are much more complex than the simple laboratory models used in work to date. The purpose of this study is to develop efficient numerical methods for analyzing EM fields in realistic settings, and to evaluate the potential application of EM technologies to cross-borehole and single-hole environment for reservoir characterization and monitoring.

  1. Geoscience experiments in boreholes: instrumentation

    SciTech Connect

    Traeger, R.K.

    1984-05-01

    Drilling is the only method available to obtain unambiguous information on processes occurring in the earth's crust. When core and virgin formation fluid samples are available, the geological state of the formation may be defined in the vicinity of the borehole with little ambiguity. Unfortunately, core recovery is expensive and often not complete, and drilling muds contaminate formation fluids. Thus, investigations turn to downhole instrumentation systems to evaluate in situ formation parameters. Some such instruments and the associated interpretative techniques are well developed, especially if they find usage in the evaluation of hydrocarbon reservoirs. Other sytems, particularly those that yield geochemical information are, at best, shallow-hole devices, but they could be engineered for deep-hole applications. Interpretations of logs obtained in igneous and metamorphic systems are not well developed. Finally, measurements away from the immediate vicinity of the borehole are possible but the technology is primitive. In situ instrumentation capabilities and needs for research in boreholes will be reviewed; the review will include details from recent US and European discussions of instrumentation needs. The capability and availability of slim hole logging tools will be summarized. Temperature limitations of the overall logging system will be discussed (current limits are 300/sup 0/C) and options for measurements to 500/sup 0/C will be described.

  2. Borehole Stability in High-Temperature Formations

    NASA Astrophysics Data System (ADS)

    Yan, Chuanliang; Deng, Jingen; Yu, Baohua; Li, Wenliang; Chen, Zijian; Hu, Lianbo; Li, Yang

    2014-11-01

    In oil and gas drilling or geothermal well drilling, the temperature difference between the drilling fluid and formation will lead to an apparent temperature change around the borehole, which will influence the stress state around the borehole and tend to cause borehole instability in high geothermal gradient formations. The thermal effect is usually not considered as a factor in most of the conventional borehole stability models. In this research, in order to solve the borehole instability in high-temperature formations, a calculation model of the temperature field around the borehole during drilling is established. The effects of drilling fluid circulation, drilling fluid density, and mud displacement on the temperature field are analyzed. Besides these effects, the effect of temperature change on the stress around the borehole is analyzed based on thermoelasticity theory. In addition, the relationships between temperature and strength of four types of rocks are respectively established based on experimental results, and thermal expansion coefficients are also tested. On this basis, a borehole stability model is established considering thermal effects and the effect of temperature change on borehole stability is also analyzed. The results show that the fracture pressure and collapse pressure will both increase as the temperature of borehole rises, and vice versa. The fracture pressure is more sensitive to temperature. Temperature has different effects on collapse pressures due to different lithological characters; however, the variation of fracture pressure is unrelated to lithology. The research results can provide a reference for the design of drilling fluid density in high-temperature wells.

  3. Defect termination on crystalline silicon surfaces by hydrogen for improvement in the passivation quality of catalytic chemical vapor-deposited SiNx and SiNx/P catalytic-doped layers

    NASA Astrophysics Data System (ADS)

    Cham Thi, Trinh; Koyama, Koichi; Ohdaira, Keisuke; Matsumura, Hideki

    2016-02-01

    We investigate the role of hydrogen (H) in the improvement in the passivation quality of silicon nitride (SiNx) prepared by catalytic chemical vapor deposition (Cat-CVD) and Cat-CVD SiNx/phosphorus (P) Cat-doped layers on crystalline silicon (c-Si) by annealing. Both structures show promising passivation capabilities for c-Si with extremely low surface recombination velocity (SRV) on n-type c-Si. Defect termination by H is evaluated on the basis of defect density (Nd) determined by electron spin resonance (ESR) spectroscopy and interface state density (Dit) calculated by the Terman method. The two parameters are found to be drastically decreased by annealing after SiNx deposition. The calculated average Dit at midgap (Dit-average) is 2.2 × 1011 eV-1 cm-2 for the SiNx/P Cat-doped c-Si sample with a SRV of 2 cm/s, which is equivalent to 3.1 × 1011 eV-1 cm-2 for the SiNx/c-Si sample with a SRV of 5 cm/s after annealing. The results indicate that H atoms play a critical role in the reduction in Dit for SiNx/c-Si and SiNx/P Cat-doped c-Si, resulting in a drastic reduction in SRV by annealing.

  4. The Equation R[subscript n]x = b over Rhotrices

    ERIC Educational Resources Information Center

    Aminu, Abdulhadi

    2010-01-01

    In this article, we consider the concept of rhotrices and present one-sided system of the form R[subscript n]x = b, where R[subscript n] is an n-dimensional rhotrix, x the unknown n-dimensional rhotrix vector and b the right-hand-side rhotrix vector.

  5. The geographic distribution and complex evolutionary history of the NX-2 trichothecene chemotype from Fusarium graminearum

    Technology Transfer Automated Retrieval System (TEKTRAN)

    F. graminearum and 21 related species form a species complex (FSAMSC-1) characterized by production of type B trichothecenes. However, some F. graminearum strains were recently found to produce NX-2, a novel type A trichothecene, resulting from variation in the trichothecene biosynthetic enzyme Tri1...

  6. Astronaut Jack Lousma seen outside Skylab space station during EVA

    NASA Technical Reports Server (NTRS)

    1973-01-01

    Astronaut Jack R. Lousma, Skylab 3 pilot, is seen outside the Skylab space station in Earth orbit during the August 5, 1973 Skylab 3 extravehicular activity (EVA) in this photographic reproduction taken from a television transmission made by a color TV camera aboard the space station. Scientist-Astronaut Owen K. Garriott, Skylab 3 science pilot, participated in the EVA with Lousma. During the EVA the two crewmen deployed the twin pole solar shield to help shade the Orbital Workshop.

  7. Hydraulically controlled discrete sampling from open boreholes

    USGS Publications Warehouse

    Harte, Philip T.

    2013-01-01

    Groundwater sampling from open boreholes in fractured-rock aquifers is particularly challenging because of mixing and dilution of fluid within the borehole from multiple fractures. This note presents an alternative to traditional sampling in open boreholes with packer assemblies. The alternative system called ZONFLO (zonal flow) is based on hydraulic control of borehole flow conditions. Fluid from discrete fractures zones are hydraulically isolated allowing for the collection of representative samples. In rough-faced open boreholes and formations with less competent rock, hydraulic containment may offer an attractive alternative to physical containment with packers. Preliminary test results indicate a discrete zone can be effectively hydraulically isolated from other zones within a borehole for the purpose of groundwater sampling using this new method.

  8. Hadean diamonds in zircon from Jack Hills, Western Australia.

    PubMed

    Menneken, Martina; Nemchin, Alexander A; Geisler, Thorsten; Pidgeon, Robert T; Wilde, Simon A

    2007-08-23

    Detrital zircons more than 4 billion years old from the Jack Hills metasedimentary belt, Yilgarn craton, Western Australia, are the oldest identified fragments of the Earth's crust and are unique in preserving information on the earliest evolution of the Earth. Inclusions of quartz, K-feldspar and monazite in the zircons, in combination with an enrichment of light rare-earth elements and an estimated low zircon crystallization temperature, have previously been used as evidence for early recycling of continental crust, leading to the production of granitic melts in the Hadean era. Here we present the discovery of microdiamond inclusions in Jack Hills zircons with an age range from 3,058 +/- 7 to 4,252 +/- 7 million years. These include the oldest known diamonds found in terrestrial rocks, and introduce a new dimension to the debate on the origin of these zircons and the evolution of the early Earth. The spread of ages indicates that either conditions required for diamond formation were repeated several times during early Earth history or that there was significant recycling of ancient diamond. Mineralogical features of the Jack Hills diamonds-such as their occurrence in zircon, their association with graphite and their Raman spectroscopic characteristics-resemble those of diamonds formed during ultrahigh-pressure metamorphism and, unless conditions on the early Earth were unique, imply a relatively thick continental lithosphere and crust-mantle interaction at least 4,250 million years ago. PMID:17713532

  9. Hydraulically-operated pump jack with chain drive

    SciTech Connect

    Ratell Jr., R. E.

    1985-02-05

    My invention relates to pumping apparatus, particularly to a hydraulically-operated pump jack for oil, brine water and the like. The apparatus is fabricated from steel plate to make a strong, but light-weight tower which may be easily transported from one site to another by a small boom truck or gin pole truck. In contrast to pump jacks of the walking beam type which are massive in size, my improved pump jack is compact and is seated on and secured directly to the head of an oil well casing. A vertically-arranged hydraulic cylinder has its piston rod connected to a cross head on which a pair of sprockets are journalled. Chains pass around respective sprockets, one reach of each chain extending upwardly and is anchored to a stationary part of the tower. The other reach of each chain extends upwardly and over and around an upper sprocket journalled on a shaft carried by the upper end of the tower, each chain then extending downwardly to a yoke to which the polish rod is connected. This arrangement will result in a 2 to 1 ratio between the movement of the polish rod and the stroke of the hydraulic cylinder.

  10. Shear wave transducer for boreholes

    DOEpatents

    Mao, N.H.

    1984-08-23

    A technique and apparatus is provided for estimating in situ stresses by measuring stress-induced velocity anisotropy around a borehole. Two sets each of radially and tangentially polarized transducers are placed inside the hole with displacement directions either parallel or perpendicular to the principal stress directions. With this configuration, relative travel times are measured by both a pulsed phase-locked loop technique and a cross correlation of digitized waveforms. The biaxial velocity data are used to back-calculate the applied stress.

  11. High-frequency electromagnetic properties of soft magnetic Y2Fe17Nx particles with easy-plane anisotropy

    NASA Astrophysics Data System (ADS)

    Tan, Guoguo; Zhang, Yongbo; Qiao, Liang; Wang, Tao; Wang, Jianbo; Li, Fashen

    2015-11-01

    The microwave magnetic properties of the soft magnetic Y2Fe17Nx (x≈3) particles with easy-plane anisotropy were reported. The high MS and out-of-plane anisotropy result in the high permeability in GHz frequency band. The complex permeability of the Y2Fe17Nx particles/paraffin composite was further enhanced by inducing the easy magnetization planes of the particles to be parallel to each other through a rotational orientation. The calculated reflection loss (RL) properties of the orientated Y2Fe17Nx composite revealed that this composite can be used as high-performance absorber in S band.

  12. AmeriFlux US-NMj Northern Michigan Jack Pine Stand

    SciTech Connect

    Chen, Jiquan

    2016-01-01

    This is the AmeriFlux version of the carbon flux data for the site US-NMj Northern Michigan Jack Pine Stand. Site Description - The jack pine site is owned by Michigan Technological University. The stand is managed, and thus thinned and harvested depending on stand age. This jack pine site is naturally regenerating following a clearcut around 1989. Heavy snow in December 2001 c

  13. Borehole Summary Report for Core Hole C4998 – Waste Treatment Plant Seismic Boreholes Project

    SciTech Connect

    Barnett, D. BRENT; Garcia, Benjamin J.

    2006-12-15

    Seismic borehole C4998 was cored through the upper portion of the Columbia River Basalt Group and Ellensburg Formation to provide detailed lithologic information and intact rock samples that represent the geology at the Waste Treatment Plant. This report describes the drilling of borehole C4998 and documents the geologic data collected during the drilling of the cored portion of the borehole.

  14. Plan for Using Solar-Powered Jack Pumps to Sample Groundwater at the Nevada Test Site

    SciTech Connect

    David Hudson, Charles Lohrstorfer, Bruce Hurley

    2007-05-03

    Groundwater is sampled from 39 monitoring wells on the Nevada Test Site (NTS) as part of the Routine Radiological Environmental Monitoring Program. Many of these wells were not designed or constructed for long-term groundwater monitoring. Some have extensive completion zones and others have obstructions such as pumps and tubing. The high-volume submersible pumps in some wells are unsuitable for long-term monitoring and result in large volumes of water that may have to be contained and characterized before subsequent disposition. The configuration of most wells requires sampling stagnant well water with a wireline bailer. Although bailer sampling allows for the collection of depth-discrete samples, the collected samples may not be representative of local groundwater because no well purging is done. Low-maintenance, solar-powered jack pumps will be deployed in nine of these onsite monitoring wells to improve sample quality. These pumps provide the lift capacity to produce groundwater from the deep aquifers encountered in the arid environment of the NTS. The water depths in these wells range from 700 to 2,340 ft below ground surface. The considerable labor and electrical power requirements of electric submersible pumps are eliminated once these pumps are installed. Access tubing will be installed concurrent with the installation of the pump string to provide downhole access for water-level measurements or other wireline instruments. Micro-purge techniques with low pump rates will be used to minimize purge volumes and reduce hydraulic gradients. The set depths of the pumps will be determined by the borehole characteristics and screened interval.

  15. Coupled aquifer-borehole simulation.

    PubMed

    Clemo, Tom

    2010-01-01

    A model coupling fluid hydraulics in a borehole with fluid flow in an aquifer is developed in this paper. Conservation of momentum is used to create a one-dimensional steady-state model of vertical flow in an open borehole combined with radially symmetric flow in an aquifer and with inflow to the well through the wellbore screen. Both laminar and turbulent wellbore conditions are treated. The influence of inflow through the wellbore screen on vertical flow in the wellbore is included, using a relation developed by Siwoń (1987). The influence of inflow reduces the predicted vertical variation in head up to 15% compared to a calculation of head losses due to fluid acceleration and the conventional Colebrook-White formulation of friction losses in a circular pipe. The wellbore flow model is embedded into the MODFLOW-2000 ground water flow code. The nonlinear conservation of momentum equations are iteratively linearized to calculate the conductance terms for vertical flow in the wellbore. The resulting simulations agree favorably with previously published results when the model is adjusted to meet the assumptions of the previous coupled models. PMID:19682095

  16. Possibility of tilt observation at the sea floor by using the BBOBST-NX system

    NASA Astrophysics Data System (ADS)

    Shiobara, H.; Ito, A.; Sugioka, H.; Shinohara, M.

    2014-12-01

    Since 1999, we had developed the broadband ocean bottom seismometer (BBOBS) and its new generation system (BBOBS-NX), and, with them, performed several practical observations to create a new category of the ocean floor broadband seismology. Now, the BBOBS data is proved to be acceptable for broadband seismic analyses. In these studies, the period range mostly used is about 10 - 200 s, but in longer period range, i.e. geodetic range, is unknown region in the sea floor observation. High mobility of our BBOBS and BBOBS-NX can be a breakthrough to realize the geodetic observation network on the sea floor. Two kinds of attempts to expand observation range toward the geodetic one have been started since 2009, based on our BBOBS technology. One is for detecting vertical displacement by attaching an absolute pressure gauge (APG) in the BBOBS system. The highly stable frequency oscillator within the OBS recorder is adequate for precise pressure measurement of the APG. This BBOBS+APG system has been operated since 2009. In this presentation, we will report results of several test experiments for the tilt observation just beneath the sea floor by using the BBOBS-NX system, as the second one. The tilt is measured by using two horizontal mass position signals of the sensor. The first test observation was performed by using the same sensor of the BBOBS-NX at the land observatory in 2010. The result was comparable with that of the water tube tilt-meter there. After the in situ test for 2 months at the sea floor in the Shikoku Basin in 2012, we started the practical tilt observation at the sea floor off Boso peninsula (KAP3 site) as the feasibility study between April 2013 and April 2014. The deployment and recovery were performed by the ROV. In both observations, a Doppler current profiler was deployed nearby the BBOBST-NX to monitor bottom currents through the observation period. In January 2014, a slow slip event (SSE) occurred near the KAP3 site. The Mw of the SSE is 6.5, and

  17. 30 CFR 75.1318 - Loading boreholes.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... shall be the primer cartridge with the end of the cartridge containing the detonator facing the back of... between each cartridge in the borehole. (d) When loading other boreholes— (1) The primer cartridge shall... inserted shall face the back of the borehole; and (3) The primer cartridge and other explosives shall...

  18. 30 CFR 75.1318 - Loading boreholes.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... shall be the primer cartridge with the end of the cartridge containing the detonator facing the back of... between each cartridge in the borehole. (d) When loading other boreholes— (1) The primer cartridge shall... inserted shall face the back of the borehole; and (3) The primer cartridge and other explosives shall...

  19. Cross-borehole and surface-to-borehole electromagnetic induction for reservoir characterization

    SciTech Connect

    Wilt, M.J.; Morrison, H.F.; Becker, A.; Lee, K.H.

    1991-08-01

    Audio-frequency cross-borehole and surface-to-borehole electromagnetics (EM) are interesting alternatives to existing techniques for petroleum reservoir characterization and monitoring. With these methods signals may be propagated several hundreds of meters through typical sand/shale reservoirs and data may be collected at high accuracy with a high sensitivity to the subsurface resistivity distribution. Field systems for cross-borehole and surface-to-borehole EM measurements have been designed and built by Lawrence Livermore and Lawrence Berkeley Laboratories for reservoir evaluation and monitoring. The cross-borehole system utilizes vertical axis induction coil antennas for transmission and detection of sinusoidal signals. Data are collected in profiles with the source coil moving continuously while its signal is detected by a stationary receiver coil located in a separate well. Subsequent profiles are collected using a different receiver depth and the same transmitter span until a suite of profiles is obtained that cover the desired interval in the borehole. The surface-to-borehole system uses a large diameter surface loop transmitter and a vertical axis borehole receiver. Due to its high signal strength this system operates using a sweep frequency transmitter waveform so that data may be simultaneously collected over several decades of frequency. Surface-to-borehole profiles are equally repeatable and although this data is less sensitive than cross-borehole EM, it can be fit to a resistivity section consistent with the borehole log. 8 refs., 14 figs.

  20. Backtracking urbanization from borehole temperature

    NASA Astrophysics Data System (ADS)

    Bayer, Peter; Rivera, Jaime A.; Blum, Philipp; Rybach, Ladislaus

    2016-04-01

    The thermal regime in shallow ground is influenced by various factors such as short and long term climatic variations, atmospheric urban warming, land use change and geothermal energy use. Temperature profiles measured in boreholes represent precious archives of the past thermal conditions at the ground surface. Changes at the ground surface induce time-dependent variations in heat transfer. Consequently, instantaneous and persistent changes such as recent atmospheric climate change or paving of streets cause perturbations in temperature profiles, which now can be found in depths of hundred meters and even more. In our work, we focus on the influence of urbanization on temperature profiles. We inspect profiles measured in borehole heat exchanger (BHE) tubes before start of energy extraction. These were obtained at four locations in the city and suburbs of Zurich, Switzerland, by lowering a specifically developed temperature logging sensor in the 200-400 m long tubes. Increased temperatures indicate the existence of a subsurface urban heat island (SUHI). At the studied locations groundwater flow can be considered negligible, and thus conduction is the governing heat transport process. These locations are also favorable, as long-term land use changes and atmospheric temperature variations are well documented for more than the last century. For simulating transient land use changes and their effects on borehole temperature profiles, a novel analytical framework based on the superposition of Green's functions is presented. This allows flexible and fast computation of the long term three-dimensional evolution of the thermal regime in shallow ground. It also facilitates calibration of unknown spatially distributed parameter values and their correlation. With the given spatial and temporal discretization of land use and background atmospheric temperature variations, we are able to quantify the heat contribution by asphalt and buildings. By Bayesian inversion it is

  1. Hydrogen absorption by Zr-1Nb alloy with TiNx film deposited by filtered cathodic vacuum arc

    NASA Astrophysics Data System (ADS)

    Kashkarov, E. B.; Nikitenkov, N. N.; Syrtanov, M. S.; Babihina, M. N.

    2016-02-01

    coating for Zr-2.5Nb alloy from hydrogenation. Dense TiNx films were prepared by filtered cathodic vacuum arc (CVA). Hydrogen absorption rate was calculated from the kinetic curves of hydrogen sorption at elevated temperature of the sample (T = 673 K) and pressure (P = 2 atm). Results revealed that TiNx films significantly reduced hydrogen absorption rate of Zr-2.5Nb.

  2. Hard and relaxed a-SiNxHy films prepared by PECVD: Structure analysis and formation mechanism

    NASA Astrophysics Data System (ADS)

    Xu, Xiangdong; He, Qiong; Fan, Taijun; Jiang, Yadong; Huang, Long; Ao, Tianhong; Ma, Chunqian

    2013-01-01

    Amorphous hydrogenated silicon nitride (a-SiNxHy) films were prepared by plasma-enhanced chemical vapor deposition (PECVD). Their chemical structures and mechanical properties were investigated. Results reveal that there are four kinds of Sisbnd N groups, involving Si3N4, Hsbnd Sisbnd N3, H2sbnd Sisbnd N2, and Si3sbnd Sisbnd N, in the a-SiNxHy films. Deposition at 300 °C and flow ratio of SiH4/NH3 = 30/30 sccm leads to the yield of special a-SiNxHy films, in which per two high-N-coordinated Sisbnd N groups (Si3N4 or Hsbnd Sisbnd N3) are distributed with one inter-buffer group (Si3sbnd Sisbnd N). Such a-SiNxHy films exhibit ultralow residual stress (-0.17 MPa), high elastic modulus (206.9 GPa) and high uniformity, holding great potential for device fabrications. The chemical reactions for the formation of a-SiNxHy films were proposed, and the thermodynamic calculations indicate that the utilization ratio of NH3 reagent in the chemical reactions increases significantly with the increase of SiH4 flow, but the utilization ratio of Sisbnd N bonds in the a-SiNxHy formation decreases inversely. This work discloses valuable information on the chemical reactions and structures for a-SiNxHy films, and suggests a route to the preparation of a-SiNxHy films with high hardness and low stress by conventional PECVD.

  3. Tough new jack-up for rough seas

    SciTech Connect

    Not Available

    1984-01-01

    Rowan Company's new deepwater jack-up, Rowan Gorilla I, is scheduled to spud its initial well off the east coast of Canada later this month for a consortium of oil companies including Bow Valley-Husky and ATS Exploration Ltd. The new rig's class designation--Gorilla--reflects designers' expectations for the drilling unit that is suited to work in virtually all ice-free hostile environmental areas of the world. Rowan's confidence in the design, built by Marathon LeTourneau's Vicksburg, Mississippi yard, is reiterated by the fact that two additional rigs in the Gorilla class are being built. Rowan Gorilla II is being constructed at Marathon's Singapore yard, and the Rowan Gorilla III is in early construction stages at the firm's Vicksburg yard. The three Gorilla-class rigs will cost in excess of $85 million each, including owner-furnished drilling equipment. This, according to owners, will make them among the costliest jack-ups in the world. Another record being claimed by the Gorilla-class drilling units is that they are the largest jack-ups in the world. Fully outfitted, a Gorilla contains 16,000 tons of steel. Its triangular hull measures 297 ft from bow to stern and 292 ft across the stern. The rig has a variable load of 2,750 tons for drilling consumables and 42,265 sq ft of deck space. Its ample storage capacity, along with its 503-ft leg length and certain design features, makes the rig compatible with hostile offshore areas, where it can continue drilling for long periods unattended.

  4. Teaching Scientists to Fish, as Inspired by Jack Dymond

    NASA Astrophysics Data System (ADS)

    Franks, S. E.

    2004-12-01

    It is almost inconceivable that as Jack Dymond's graduate student for eight years, I never mastered the skill of fly-fishing, a pursuit so near and dear to his heart. In fact, Jack did inspire me, not to tie flies and cast, but eventually to teach fellow scientists to fish. The work I'll present - connecting scientists and educators to achieve societal benefit - is profoundly influenced by Jack's dedication to applying scientific understanding and critical thinking to societal issues. With colleagues in the Centers for Ocean Sciences Education Excellence (COSEE), http://www.cosee.net/, I enable scientists to efficiently make meaningful contributions to educational outreach. A key goal of the multi-Center, national COSEE Network is helping scientists build the skills and acquire the resources needed to share their science with diverse audiences. At Scripps, we are piloting an innovative approach to helping scientists meet funding agencies' broader impact requirements. Key elements of the approach include: 1) services to identify educational outreach options that best fit scientists' research and preferences; 2) assistance establishing partnerships with educational outreach providers who have the skills and resources to develop and implement effective programs and exhibits; and 3) nuts and bolts (line and fly) assistance writing proposal text, drafting budgets, and coordinating with institutional business offices to ensure that the proposed educational outreach effort is compelling and sufficiently funded. Where does the fishing lesson come in? We facilitators of scientist-educator partnerships empower scientists to launch enduring collaborations. Once comfortable working with top-notch educational organizations, scientists can tap these resources, project after project, often with little or no additional involvement on our part. Our initial investment in brokering the relationships is richly rewarded. By helping scientists get started, it's as if we are teaching

  5. The influence of musical cadence into aquatic jumping jacks kinematics.

    PubMed

    Costa, Mário J; Oliveira, Cristiana; Teixeira, Genoveva; Marinho, Daniel A; Silva, António J; Barbosa, Tiago M

    2011-01-01

    The aim of this study was to analyze the relationships between the head-out aquatic exercise "Jumping jacks" kinematics and the musical cadence in healthy and fit subjects. Five young women, with at least one year of experience conducting head- out aquatic programs were videotaped in the frontal plane, with a pair of cameras providing a double projection (above and below the water surface). Subjects performed an incremental protocol of five bouts (120 b·min(-1), 135 b·min(-1), 150 b·min(-1), 165 b·min(-1) and 180 b·min(-1)) with 16 full cycles of the "Jumping jacks" exercise. Data processing and calculation of upper limbs' (i.e. hands), lower limbs' (i.e. feet) and center of mass' 2D linear velocity and displacement were computed with the software Ariel Performance Analysis System and applying the 2D-DLT algorithm. Subjects decreased the cycle period during the incremental protocol. Significant and negative relationships with the musical cadence were verified for the center of mass and upper limbs vertical displacement. On the other hand, for the lower limbs lateral velocity, a significant and positive relationship was observed. It is concluded that expert and fit subjects increase the lower limb's velocity to maintain the range of motion, while the upper limb's displacement is reduced to coupe the music cadence. Key pointsWhile performing the Jumping Jacks, expert and fit subjects increase their lower limbs segmental velocity to maintain the range of motion.The upper limbs displacement is reduced to maintain the music cadence.Expert and fit subjects present similar response for alternating or simultaneously head-out aquatic exercises when increasing the music cadence. PMID:24149548

  6. Prediction methods of spudcan penetration for jack-up units

    NASA Astrophysics Data System (ADS)

    Zhang, Ai-xia; Duan, Meng-lan; Li, Hai-ming; Zhao, Jun; Wang, Jian-jun

    2012-12-01

    Jack-up units are extensively playing a successful role in drilling engineering around the world, and their safety and efficiency take more and more attraction in both research and engineering practice. An accurate prediction of the spudcan penetration depth is quite instrumental in deciding on whether a jack-up unit is feasible to operate at the site. The prediction of a too large penetration depth may lead to the hesitation or even rejection of a site due to potential difficulties in the subsequent extraction process; the same is true of a too small depth prediction due to the problem of possible instability during operation. However, a deviation between predictive results and final field data usually exists, especially when a strong-over-soft soil is included in the strata. The ultimate decision sometimes to a great extent depends on the practical experience, not the predictive results given by the guideline. It is somewhat risky, but no choice. Therefore, a feasible predictive method for the spudcan penetration depth, especially in strata with strong-over-soft soil profile, is urgently needed by the jack-up industry. In view of this, a comprehensive investigation on methods of predicting spudcan penetration is executed. For types of different soil profiles, predictive methods for spudcan penetration depth are proposed, and the corresponding experiment is also conducted to validate these methods. In addition, to further verify the feasibility of the proposed methods, a practical engineering case encountered in the South China Sea is also presented, and the corresponding numerical and experimental results are also presented and discussed.

  7. Memristor and selector devices fabricated from HfO2-xNx

    NASA Astrophysics Data System (ADS)

    Murdoch, B. J.; McCulloch, D. G.; Ganesan, R.; McKenzie, D. R.; Bilek, M. M. M.; Partridge, J. G.

    2016-04-01

    Monoclinic HfO2-xNx has been incorporated into two-terminal devices exhibiting either memristor or selector operation depending on the controlled inclusion/suppression of mobile oxygen vacancies. In HfO2 memristors containing oxygen vacancies, gradual conductance modulation, short-term plasticity, and long-term potentiation were observed using appropriate voltage-spike stimulation, suggesting suitability for artificial neural networks. Passivation of oxygen vacancies, confirmed by X-ray absorption spectroscopy, was achieved in HfO2-xNx films by the addition of nitrogen during growth. Selector devices formed on these films exhibited threshold switching and current controlled negative differential resistance consistent with thermally driven insulator to metal transitions.

  8. Fabrication of Si heterojunction solar cells using P-doped Si nanocrystals embedded in SiNx films as emitters

    PubMed Central

    2013-01-01

    Si heterojunction solar cells were fabricated on p-type single-crystal Si (sc-Si) substrates using phosphorus-doped Si nanocrystals (Si-NCs) embedded in SiNx (Si-NCs/SiNx) films as emitters. The Si-NCs were formed by post-annealing of silicon-rich silicon nitride films deposited by electron cyclotron resonance chemical vapor deposition. We investigate the influence of the N/Si ratio in the Si-NCs/SiNx films on their electrical and optical properties, as well as the photovoltaic properties of the fabricated heterojunction devices. Increasing the nitrogen content enhances the optical gap E04 while deteriorating the electrical conductivity of the Si-NCs/SiNx film, leading to an increased short-circuit current density and a decreased fill factor of the heterojunction device. These trends could be interpreted by a bi-phase model which describes the Si-NCs/SiNx film as a mixture of a high-transparency SiNx phase and a low-resistivity Si-NC phase. A preliminary efficiency of 8.6% is achieved for the Si-NCs/sc-Si heterojunction solar cell. PMID:24188725

  9. Efficiency improvement of flexible a-SiGe:H solar cells decorated by SiNx composite nanostructures

    NASA Astrophysics Data System (ADS)

    Wang, Yanyan; Ye, Xiaojun; Zhu, Jian; Zhang, Zhen; Yang, Junkun; Wu, Xuemei; Qiu, Bocang; Zhang, Ruiying

    2015-05-01

    We report on the experimental demonstration of the efficiency improvement of flexible a-SiGe:H solar cells decorated by SiNx composite nanostructures. The structures, which are composed of SiNx nanodome structures and a thin SiNx film that is underneath the nanodome structures, were implemented via sequential processes using inductance-coupled plasma chemical vapor deposition (ICP-CVD), nanosphere lithography (NSL), and reactive ion etching (RIE). Compared with the a-SiGe:H solar cells without the SiNx composite nanostructures, solar cells with SiNx composite nanostructures exhibit that the surface reflectivity reduces down to less than 5% over the spectrum range of 200-700 nm, and the open circuit voltage (Voc) and fill factor (FF) increase up to 0.76 V from 0.70 V and 52.4% from 38.4% respectively, although the short circuit current density (Jsc) reduces down to 11.6 mA/cm2 from 14.7 mA/cm2. The improvement for Voc and FF indicates that a-SiGe:H solar cells were well passivated by using such SiNx composite structures, which results in the overall enhancement of the conversion efficiency from 4.38% to 5.13% finally. If the absorption of the dielectric composite nanostructures decreases, the higher conversion efficiency should be promisingly achieved in these Si-based thin film solar cells decorated by dielectric composite nanostructures.

  10. Forest Modeling of Jack Pine Trees for BOREAS

    NASA Technical Reports Server (NTRS)

    Moghhadam, Mahta; Saatchi, Sasan

    1994-01-01

    As a part of the intensive field campaign for the Boreal forest ecosystem-atmosphere research (BOREAS) project in August 1993, the NASA/JPL AIRSAR covered an area of about 100 km by 100 km near the Prince Albert National Park in Saskatchewan, Canada. At the same time, ground-truth measurements were made in several stands which have been selected as the primary study sites, as well as in some auxiliary sites. This paper focuses on an area including Jack Pine stands in the Nipawin area near the park.

  11. Astronaut Jack Lousma in Lower Body Negative Pressure Device

    NASA Technical Reports Server (NTRS)

    1973-01-01

    A medium close-up view of Astronaut Jack R. Lousma, Skylab 3 pilot, in the Lower Body Negative Pressure Device (LBNPD), as Astronaut Alan L. Bean, commander, works around the leg band area. This portion of the LBNPD MO-92 experiment was televised on August 7, 1973. The LBNPD experiment is to provide information concerning the time course of cardiovascular adaptation during flight, and to provide inflight data for predicting the degree of orthostatic intolerence and impairment of physical capacity to be expected upon returning to Earth environment. The bicycle ergometer is in the background, partially visible behind Bean.

  12. Astronaut Jack Lousma seen outside Skylab space station during EVA

    NASA Technical Reports Server (NTRS)

    1973-01-01

    Astronaut Jack R. Lousma, Skylab 3 pilot, is seen outside the Skylab space station in Earth orbit during the August 5, 1973 Skylab 3 extravehicular activity (EVA) in this photographic reproduction taken from a television transmission made by a color TV camera aboard the space station. Lousma is at the Apollo Telescope Mount EVA work station assembling one of the two 55-foot long sectionalized poles for the twin pole solar shield which was deployed to help cool the Orbital Workshop. Part of the Airlock Module's thermal/meteoroid curtain is in the left foreground.

  13. Kimama Well - Borehole Geophysics Database

    DOE Data Explorer

    Shervais, John

    2011-07-04

    The Snake River Plain (SRP), Idaho, hosts potential geothermal resources due to elevated groundwater temperatures associated with the thermal anomaly Yellowstone-Snake River hotspot. Project HOTSPOT has coordinated international institutions and organizations to understand subsurface stratigraphy and assess geothermal potential. Over 5.9km of core were drilled from three boreholes within the SRP in an attempt to acquire continuous core documenting the volcanic and sedimentary record of the hotspot: (1) Kimama, (2) Kimberly, and (3) Mountain Home. The Kimama drill site was set up to acquire a continuous record of basaltic volcanism along the central volcanic axis and to test the extent of geothermal resources beneath the Snake River aquifer. Data submitted by project collaborator Doug Schmitt, University of Alberta

  14. Kimberly Well - Borehole Geophysics Database

    DOE Data Explorer

    Shervais, John

    2011-07-04

    The Snake River Plain (SRP), Idaho, hosts potential geothermal resources due to elevated groundwater temperatures associated with the thermal anomaly Yellowstone-Snake River hotspot. Project HOTSPOT has coordinated international institutions and organizations to understand subsurface stratigraphy and assess geothermal potential. Over 5.9km of core were drilled from three boreholes within the SRP in an attempt to acquire continuous core documenting the volcanic and sedimentary record of the hotspot: (1) Kimama, (2) Kimberly, and (3) Mountain Home. The Kimberly drill hole was selected to document continuous volcanism when analysed in conjunction with the Kimama and is located near the margin of the plain. Data submitted by project collaborator Doug Schmitt, University of Alberta

  15. Magnetotransport in perovskite series La{sub n{minus}nx}Ca{sub 1+nx}Mn{sub n}O{sub 3n+1} ferromagnets

    SciTech Connect

    Asano, H.; Hayakawa, J.; Matsui, M.

    1998-01-01

    The perovskite series La{sub n{minus}nx}Ca{sub 1+nx}Mn{sub n}O{sub 3n+1} (n=2,3, and {infinity}) composed of n layers of MnO{sub 2} is a colossal magnetoresistance (CMR) ferromagnet. Results on the transport properties of epitaxial a-axis thin-film samples with a fixed carrier concentration (x=0.3) have indicated that a reduction in the number of layers results in systematic changes in the various features. These include an increase in resistivity, a decrease in the resistivity peak temperature T{sub c}{sup {rho}} corresponding to the metal-insulator transition, an enhancement of the maximum MR near T{sub c}{sup {rho}}, and an increase in the low-temperature intrinsic MR. In order to explain the variation in these features with the number of MnO{sub 2} layers, it is necessary to take both c-axis transfer interaction and two-dimensional spin fluctuation into account. {copyright} {ital 1998} {ital The American Physical Society}

  16. Infrared absorption of thin films MoSi2/SiNx micro-bridge

    NASA Astrophysics Data System (ADS)

    Jiang, Bo; Su, Yan; He, Yong; Wang, Kaiying

    2016-02-01

    In this paper, we report the infrared absorption and opto-electrical characteristics of multilayered thin films of MoSi2/SiNx with a micro-bridge structure. The thin films of MoSi2 deposited by radio frequency magnetron sputtering exhibit a relatively smooth surface (RMS roughness <1 nm, ˜0.98 Å/s), on which their square resistance is linearly increased from 340 to 550 Ω/sq. as the thickness decreases from 32 to 16 nm. Fourier transform infrared spectroscopy analysis indicates that the thin film MoSi2 with a thickness of ˜24 nm (450 Ω/sq.) presents the maximum infrared absorption on nearly dielectric thin film SiNx. Optical simulation verifies that the resistivity of the nearly dielectric thin film SiNx has an important influence on the infrared absorption of the thin film MoSi2. This work provides the physical understanding regarding the building of micro-bridges with the high infrared absorption.

  17. Spontaneous magnetization of the Ising model on the union jack and 4-6 lattices

    NASA Astrophysics Data System (ADS)

    Lin, K. Y.; Wang, S. C.

    1988-03-01

    Spontaneous magnetization of the Ising model on the anisotropic Union Jack and 4-6 lattices are derived exactly. The conjecture by Lin and Wang is confirmed. Our result is a generalization of the recent work on the isotropic Union Jack lattice by Choy and Baxter.

  18. Investigating the Jack the Ripper Case: Engaging Students in a Criminal Investigations Class through Active Learning

    ERIC Educational Resources Information Center

    Gutierrez, Daniel; Kazmi, Syed

    2010-01-01

    The present study examines the utilization of a class project involving the Jack the Ripper murders. Students enrolled in a criminal investigations class were required to investigate the five canonical murders associated with the infamous serial killer known as Jack the Ripper and the murders that occurred in London during 1888. This paper…

  19. 14 CFR 25.519 - Jacking and tie-down provisions.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Jacking and tie-down provisions. 25.519 Section 25.519 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES Structure Ground Loads § 25.519 Jacking and tie-down provisions. (a) General. The...

  20. Qualitative Research, Semiotics, North Beach, South of Markey, Jack London, and the Grateful Dead.

    ERIC Educational Resources Information Center

    Shank, Gary

    1999-01-01

    Looks at educational research from a macro perspective, advocating semiotics as the foundation for qualitative research in education. Presents myths and disputations and an open-ended conclusion via the kaleidoscopic interpretations of Jack London, Phil Dick, Jack Kerouac, the Grateful Dead, and an assortment of street characters. (Author/VWL)

  1. Transitional Experiences of Post-16 Sports Education: Jack's Story

    ERIC Educational Resources Information Center

    Aldous, David C. R.; Sparkes, Andrew C.; Brown, David H. K.

    2014-01-01

    This paper explores the layered transitional experiences of a semi-professional athlete named Jack (a pseudonym) between the fields of professional sport and further and higher education. Our analysis is framed by the quadripartite framework of structuration and focuses on Jack's "in-situ" practices at his college and university in…

  2. 77 FR 42713 - Notice of Intent to Grant an Exclusive License; PadJack, Inc.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-20

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF DEFENSE Office of the Secretary Notice of Intent to Grant an Exclusive License; PadJack, Inc. AGENCY: National... intent to grant PadJack, Inc. a revocable exclusive license to practice the following...

  3. 29 CFR 1926.305 - Jacks-lever and ratchet, screw, and hydraulic.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 8 2010-07-01 2010-07-01 false Jacks-lever and ratchet, screw, and hydraulic. 1926.305... Power § 1926.305 Jacks—lever and ratchet, screw, and hydraulic. (a) General requirements. (1) The... secured at once. (ii) Hydraulic jacks exposed to freezing temperatures shall be supplied with an...

  4. Remembering Community Inclusion: Stories From the Life of Jack Eldon Baker

    ERIC Educational Resources Information Center

    Millington, Michael J.

    2005-01-01

    Jack Eldon Baker was born, lived, and died in Gilbert, Arkansas. The story of his life is retold in excerpts from a memorial publication published by the people of the town. This article also makes the case that his story is an example of community inclusion. Through the voices of those who knew him, we see Jack as a person who gave to the…

  5. PBO Borehole Strain and Siesmic Network

    NASA Astrophysics Data System (ADS)

    Mencin, D.; Jackson, M.; Anderson, G.; Hodgkinson, K.; Hasting, M.; Dittman, T.; Johnson, W.; Meertens, C.

    2007-05-01

    UNAVCO is a non-profit, community-based organization funded by the National Science Foundation to install and operate the geodetic component of EarthScope called the Plate Boundary Observatory (PBO). UNAVCO will install 103 borehole tensor strainmeters/seismometers and 28 borehole tiltmeters These instruments will be used to study the three-dimensional strain field resulting from deformation across the active boundary zone between the Pacific and North American plates in the western United States in hopes of increasing our understanding of the causes and mechanisms associated with earthquakes and volcanic activity. This represents almost a tripling of all installed borehole strainmeters in North America. Since the initial deployment of strainmeters in the early 1980's, borehole strainmeters have contributed valuable data at periods ranging from minutes to weeks with sensitivities two to three orders of magnitude better than continuous GPS at periods of days to weeks. Borehole strainmeters have been used to image earthquakes, slow earthquakes, creep events and volcanic eruptions in the US, Iceland and Japan. A brief history of US BSM program is presented. Initial PBO strainmeter deployments show promising results: imaging two slow slip events in the PNW along with excellent tele-siesmic imaging. Exciting work has been done in the PBO community relating modeled strain from the GPS network to observed strain from the BSM network. PBO also plans the installation of three volcanic arrays at Mt St Helens, Yellowstone and Long Valley. In addition to strainmeters, each borehole contains a three-component geophone and a pore pressure transducer. A subset of the boreholes are also used for heat flow measurements. When completed the PBO borehole strainmeter network will be the largest network of strainmeters installed to date and one of the world's largest borehole seismic networks. These instruments will bridge the gap between seismology and space-geodetic techniques and

  6. Cloning, expression, and crystallization of jack bean (Canavalia ensiformis) canavalin.

    PubMed Central

    Ng, J D; Ko, T P; McPherson, A

    1993-01-01

    Canavalin is the major storage protein of the jack bean (Canavalia ensiformis) and belongs to the classical vicilin fraction. A full-length cDNA for canavalin was generated by the polymerase chain reaction. The nucleotide sequence coding for canavalin and the corresponding amino acid sequence were determined and shown to be homologous with those of other seed storage proteins. The amino acid sequence contained an internal sequence duplication corresponding to the structural redundancy in the monomer demonstrated by crystallographic analysis. The coding region of the canavalin cDNA was inserted into a T7 RNA polymerase expression vector and used to transform Escherichia coli. A recombinant protein with a molecular mass of 47 kilodaltons was expressed and purified to 95% homogeneity. The protein exhibited the same physical, immunological, and biochemical properties as native jack bean canavalin. Recombinant canavalin, following treatment with trypsin, was crystallized in two forms. Crystals of a rhombohedral habit grew to 1 mm in the longest dimension and diffracted to beyond 3-A resolution. Three-dimensional diffraction data demonstrated crystals of the recombinant protein to be isomorphous with crystals of the natural plant protein, thereby confirming the identity of their structures. PMID:8310055

  7. Comparing Luminex NxTAG-Respiratory Pathogen Panel and RespiFinder-22 for multiplex detection of respiratory pathogens.

    PubMed

    Beckmann, Christiane; Hirsch, Hans H

    2016-08-01

    Respiratory tract infection (RTI) involves a variety of viruses and bacteria, which can be conveniently detected by multiplex nucleic acid amplification testing (NAT). To compare the novel Luminex-based NxTAG-Respiratory Pathogen Panel (NxTAG-RPP) with the routine multiplex-ligation-NAT based RespiFinder-22® (RF-22), 282 respiratory specimens including nasopharyngeal swabs (71%), broncho-alveolar lavage (27%), throat swabs, tracheal secretions, and sputum (2%) from 116 children and 155 adults were extracted using a Corbett CAS1200 (Qiagen), and analyzed in parallel by the routine RF-22 and NxTAG-RPP. Concordant results were obtained in 263 (93.3%) cases consisting of concordant positives in 167 (59.2%) and concordant negatives in 96 (34%). Results were discordant in 19 (6.7%) consisting of 15 positive:negative, and 4 negative:positive results by NxTAG-RPP versus RF-22, respectively. Co-infections were observed in 10.3% with NxTAG-RPP and in 5.9% with RF-22. Most additional viral pathogens identified by the NxTAG-RPP involved dual infections with rhinovirus and RSV. Discordant samples were mainly due to low genome signals of Ct less than 36, when retested by QNAT suggesting a higher sensitivity of the NxTAG-RPP, also when detecting multiple infections. Hands-on time after extraction for 24 and 96 samples was 0.25 and <0.5 hr for the NxTAG-RPP, and 2 and 4 hr for the RF-22, respectively. The median turn-around time was 6 hr (range 5-7 hr) for NxTAG-RPP and 12 hr (range 8-16 hr) for RF-22. The NxTAG-RPP showed comparable detection rates for most respiratory pathogens, while hands-on and turn-around time were considerably shorter. The clinical significance of detecting multiple viruses needs further clinical evaluation. J. Med. Virol. 88:1319-1324, 2016. © 2016 Wiley Periodicals, Inc. PMID:26856438

  8. Advanced motor driven clamped borehole seismic receiver

    DOEpatents

    Engler, Bruce P.; Sleefe, Gerard E.; Striker, Richard P.

    1993-01-01

    A borehole seismic tool including a borehole clamp which only moves perpendicular to the borehole. The clamp is driven by an electric motor, via a right angle drive. When used as a seismic receiver, the tool has a three part housing, two of which are hermetically sealed. Accelerometers or geophones are mounted in one hermetically sealed part, the electric meter in the other hermetically sealed part, and the clamp and right angle drive in the third part. Preferably the tool includes cable connectors at both ends. Optionally a shear plate can be added to the clamp to extend the range of the tool.

  9. Advanced motor driven clamped borehole seismic receiver

    DOEpatents

    Engler, B.P.; Sleefe, G.E.; Striker, R.P.

    1993-02-23

    A borehole seismic tool is described including a borehole clamp which only moves perpendicular to the borehole. The clamp is driven by an electric motor, via a right angle drive. When used as a seismic receiver, the tool has a three part housing, two of which are hermetically sealed. Accelerometers or geophones are mounted in one hermetically sealed part, the electric motor in the other hermetically sealed part, and the clamp and right angle drive in the third part. Preferably the tool includes cable connectors at both ends. Optionally a shear plate can be added to the clamp to extend the range of the tool.

  10. Borehole Summary Report for Waste Treatment Plant Seismic Borehole C4993

    SciTech Connect

    Rust, Colleen F.; Barnett, D. BRENT; Bowles, Nathan A.; Horner, Jake A.

    2007-02-28

    A core hole (C4998) and three boreholes (C4993, C4996, and C4997) were drilled to acquire stratigraphic and downhole seismic data to model potential seismic impacts and to refine design specifications and seismic criteria for the Waste Treatment Plant (WTP) under construction on the Hanford Site. Borehole C4993 was completed through the Saddle Mountains Basalt, the upper portion of the Wanapum Basalt, and associated sedimentary interbeds, to provide a continuous record of the rock penetrated by all four holes and to provide access to the subsurface for geophysical measure¬ment. Presented and compiled in this report are field-generated records for the deep mud rotary borehole C4993 at the WTP site. Material for C4993 includes borehole logs, lithologic summary, and record of rock chip samples collected during drilling through the months of August through early October. The borehole summary report also includes documentation of the mud rotary drilling, borehole logging, and sample collection.

  11. Serum NX-DCP as a New Noninvasive Model to Predict Significant Liver Fibrosis in Chronic Hepatitis C

    PubMed Central

    Saito, Masaya; Yano, Yoshihiko; Hirano, Hirotaka; Momose, Kenji; Yoshida, Masaru; Azuma, Takeshi

    2015-01-01

    Background: Finding a noninvasive method to predict liver fibrosis using inexpensive and easy-to-use markers is important. Objectives: We aimed to clarify whether NX-des-γ-carboxyprothrombin (NX-DCP) could become a new noninvasive model to predict liver fibrosis in hepatitis C virus (HCV) related liver disease. Patients and Methods: We performed a prospective cohort study on a consecutive group of 101 patients who underwent liver biopsy for HCV-related liver disease at Kobe University Hospital. Laboratory measurements were performed on the same day as the biopsy. Factors associated with significant fibrosis (F3-4) were assessed by multivariate analyses. A comparison of predictive ability between multivariate factors and abovementioned noninvasive models was also performed. Results: Increase in serum NX-DCP was significantly related to increase in fibrosis stage (P = 0.006). Moreover, NX-DCP was a multivariate factor associated with the presence of significant fibrosis F 3-4 (median 21 of F0-2 group vs. median 22 of F3-4 group with P = 0.002). The AUC of NX-DCP showed no significant differences compared with those of the AST-to-platelet ratio index (APRI), modified-APRI, the Göteborg University Cirrhosis Index (GUCI), the Lok index, the Hui score, cirrhosis discriminating score (CDS) and the Pohl score (P > 0.05). Conclusions: NX-DCP correlated positively with fibrosis stage and could discriminate well between HCV-related patients with or without significant fibrosis. Moreover, NX-DCP had a similar predictive ability to the abovementioned models, and thereby could be a new noninvasive prediction tool for fibrosis. PMID:25788955

  12. High-rate deposition of a-SiNx:H for photovoltaic applications by the expanding thermal plasma

    NASA Astrophysics Data System (ADS)

    Kessels, W. M. M.; Hong, J.; van Assche, F. J. H.; Moschner, J. D.; Lauinger, T.; Soppe, W. J.; Weeber, A. W.; Schram, D. C.; van de Sanden, M. C. M.

    2002-09-01

    Driven by the need for improvement of the economical competitiveness of photovoltaic energy, the feasibility of high-rate (>1 nm/s) amorphous silicon nitride (a-SiNx):H deposited by the expanding thermal plasma (ETP) technique has been explored with respect to the application of the a-SiNx:H as functional antireflection coating on crystalline silicon solar cells. First, the deposition rate and the a-SiNx:H film properties, such as refractive index, Si, N, and H atomic density, and hydrogen bonding configurations, have been mapped for various operating conditions. From ellipsometry, elastic recoil detection, and infrared spectroscopy, it has been shown that deposition rates up to 20 nm/s can be reached with a fair film homogeneity and that the refractive index and the N/Si ratio can fully be tuned by the plasma composition while the hydrogen content can be controlled by the substrate temperature. Good antireflection coating performance of the a-SiNx:H has therefore been observed for monocrystalline silicon solar cells. These cells with ETP a-SiNx:H yielded only slightly lower conversion efficiencies than high-quality reference cells due to a much lower degree of surface passivation. This lack of surface passivation has also been shown in a separate study on the surface recombination velocity. Furthermore, it has been tested whether the a-SiNx:H films lead to silicon bulk passivation, which is essential for solar cells based on cheaper, defective silicon stock material such as multicrystalline silicon. It has been proven that bulk passivation of the cells is indeed induced by the high-rate ETP deposited a-SiNx:H after a high-temperature step in which the metal contacts of the cells are processed. These results make the ETP technique an interesting candidate for high-throughput processing of competitive silicon solar cells. copyright 2002 American Vacuum Society.

  13. Which boreholes do we need to resolve the Common Era in borehole paleoclimatology?

    NASA Astrophysics Data System (ADS)

    Rath, V.; Smerdon, J. E.; Gonzalez-Rouco, F. J.; Beltrami, H.

    2011-12-01

    The global database of borehole temperature profiles used to estimate paleoclimatic ground surface temperature histories (GSTHs) has typically focused on the last 500 years. his is mainly due to the fact that the borehole database is dominated by shallow boreholes (~200-300 m). Nevertheless, it has been shown that these boreholes may be too shallow for proper separation of the downwelling climatic transient and the long-term background steady-state signal associated with heat loss from the earth's interior. The mere inclusion of deeper boreholes, however, does not necessarily mitigate the problem. Borehole temperature profiles of any depth show the signatures of earlier climatic changes, including the strong warming following the last glacial maximum (LGM). In shallow boreholes this effect is very similar to a linear trend, usually cannot be discriminated from a steady-state geotherm, and is unlikely to strongly impact estimates of GSTHs spanning common-era timescales. In deeper boreholes, however, the signature of the LGM cannot be approximated linearly, and biases associated with the LGM may impact GSTH reconstructions during the Common Era. The combined incentive to employ deep boreholes for reliable estimation of the background steady-state signal, while limiting the LGM impacts on reconstructions of Common-Era GSTHs thus leads to an multi-objective optimization problem seeking a trade-off between the impacts of the two effects. Such an optimization of the borehole maximum depth criterion is investigated in this study using numerical models. A Monte Carlo ensemble approach is used to quantify the impact of various reconstruction decisions as temperature histories, error characteristics, thermophysical properties, and maximum borehole depths. The findings have implications for interpretations of current global reconstruction products and future efforts to analyze the global borehole database for Common-Era GSTH reconstructions.

  14. Which boreholes do we need to resolve the Common Era in borehole paleoclimatology?

    NASA Astrophysics Data System (ADS)

    Rath, V.; Smerdon, J. E.; González-Rouco, J. F.; Beltrami, H.

    2012-04-01

    The global database of borehole temperature profiles used to estimate paleoclimatic ground surface temperature histories (GSTHs) has typically focused on the last 500 years. his is mainly due to the fact that the borehole database is dominated by shallow boreholes (~200-300 m). Nevertheless, it has been shown that these boreholes may be too shallow for proper separation of the downwelling climatic transient and the long-term background steady-state signal associated with heat loss from the earth's interior. The mere inclusion of deeper boreholes, however, does not necessarily mitigate the problem. Borehole temperature profiles of any depth show the signatures of earlier climatic changes, including the strong warming following the last glacial maximum (LGM). In shallow boreholes this effect is very similar to a linear trend, usually cannot be discriminated from a steady-state geotherm, and is unlikely to strongly impact estimates of GSTHs spanning common-era timescales. In deeper boreholes, however, the signature of the LGM cannot be approximated linearly, and biases associated with the LGM may impact GSTH reconstructions during the Common Era. The combined incentive to employ deep boreholes for reliable estimation of the background steady-state signal, while limiting the LGM impacts on reconstructions of Common-Era GSTHs thus leads to an multi-objective optimization problem seeking a trade-off between the impacts of the two effects. Such an optimization of the borehole maximum depth criterion is investigated in this study using numerical models. A Monte Carlo ensemble approach is used to quantify the impact of various reconstruction decisions as temperature histories, error characteristics, thermophysical properties, and maximum borehole depths. The findings have implications for interpretations of current global reconstruction products and future efforts to analyze the global borehole database for Common-Era GSTH reconstructions. (http://palma.fis.ucm.es/~volker/)

  15. Borehole Summary Report for Waste Treatment Plant Seismic Borehole C4996

    SciTech Connect

    Adams , S. C.; Ahlquist, Stephen T.; Fetters, Jeffree R.; Garcia, Ben; Rust, Colleen F.

    2007-01-28

    This report presents the field-generated borehole log, lithologic summary, and the record of samples collected during the recent drilling and sampling of the basalt interval of borehole C4996 at the Waste Treatment Plant (WTP) on the Hanford Site. Borehole C4996 was one of four exploratory borings, one core hole and three boreholes, drilled to investigate and acquire detailed stratigraphic and down-hole seismic data. This data will be used to define potential seismic impacts and refine design specifications for the Hanford Site WTP.

  16. Using Boreholes as Windows into Groundwater Ecosystems

    PubMed Central

    Sorensen, James P. R.; Maurice, Louise; Edwards, François K.; Lapworth, Daniel J.; Read, Daniel S.; Allen, Debbie; Butcher, Andrew S.; Newbold, Lindsay K.; Townsend, Barry R.; Williams, Peter J.

    2013-01-01

    Groundwater ecosystems remain poorly understood yet may provide ecosystem services, make a unique contribution to biodiversity and contain useful bio-indicators of water quality. Little is known about ecosystem variability, the distribution of invertebrates within aquifers, or how representative boreholes are of aquifers. We addressed these issues using borehole imaging and single borehole dilution tests to identify three potential aquifer habitats (fractures, fissures or conduits) intercepted by two Chalk boreholes at different depths beneath the surface (34 to 98 m). These habitats were characterised by sampling the invertebrates, microbiology and hydrochemistry using a packer system to isolate them. Samples were taken with progressively increasing pumped volume to assess differences between borehole and aquifer communities. The study provides a new conceptual framework to infer the origin of water, invertebrates and microbes sampled from boreholes. It demonstrates that pumping 5 m3 at 0.4–1.8 l/sec was sufficient to entrain invertebrates from five to tens of metres into the aquifer during these packer tests. Invertebrates and bacteria were more abundant in the boreholes than in the aquifer, with associated water chemistry variations indicating that boreholes act as sites of enhanced biogeochemical cycling. There was some variability in invertebrate abundance and bacterial community structure between habitats, indicating ecological heterogeneity within the aquifer. However, invertebrates were captured in all aquifer samples, and bacterial abundance, major ion chemistry and dissolved oxygen remained similar. Therefore the study demonstrates that in the Chalk, ecosystems comprising bacteria and invertebrates extend from around the water table to 70 m below it. Hydrogeological techniques provide excellent scope for tackling outstanding questions in groundwater ecology, provided an appropriate conceptual hydrogeological understanding is applied. PMID:23936176

  17. Borehole stability in densely welded tuffs

    SciTech Connect

    Fuenkajorn, K.; Daemen, J.J.K.

    1992-07-01

    The stability of boreholes, or more generally of underground openings (i.e. including shafts, ramps, drifts, tunnels, etc.) at locations where seals or plugs are to be placed is an important consideration in seal design for a repository (Juhlin and Sandstedt, 1989). Borehole instability or borehole breakouts induced by stress redistribution could negate the effectiveness of seals or plugs. Breakout fractures along the wall of repository excavations or exploratory holes could provide a preferential flowpath for groundwater or gaseous radionuclides to bypass the plugs. After plug installation, swelling pressures exerted by a plug could induce radial cracks or could open or widen preexisting cracks in the rock at the bottom of the breakouts where the tangential compressive stresses have been released by the breakout process. The purpose of the work reported here is to determine experimentally the stability of a circular hole in a welded tuff sample subjected to various external boundary loads. Triaxial and biaxial borehole stability tests have been performed on densely welded Apache Leap tuff samples and Topopah Spring tuff samples. The nominal diameter of the test hole is 13.3 or 14.4 mm for triaxial testing, and 25.4 mm for biaxial testing. The borehole axis is parallel to one of the principal stress axes. The boreholes are drilled through the samples prior to applying external boundary loads. The boundary loads are progressively increased until breakouts occur or until the maximum load capacity of the loading system has been reached. 74 refs.

  18. Effect of Duty Cycle on Characteristics of CrNx Thin Films Deposited by Pulsed Direct Current Reactive Magnetron Sputtering

    NASA Astrophysics Data System (ADS)

    Chang, Chi-Lung; Wu, Bo-Yi; Chen, Pin-Hung; Chen, Wei-Chih; Ho, Chun-Ta; Wu, Wan-Yu

    2013-11-01

    CrNx thin films have been deposited on silicon wafer, 304 stainless steel, and tungsten carbide substrates using pulsed DC reactive magnetron sputtering. A 10 kHz unipolar mode and a N2/Ar ratio of 17.5% were used. During the deposition, the substrate was not biased and not heated during the entire deposition time of 30 min. The microstructure, crystalline phase, and mechanical properties of the obtained CrNx thin films were examined to investigate the effect of the duty cycle. The results show that the maximum current and power density increase with decreasing duty cycle from 100% (DC) to 5%. Although the thickness of the CrNx thin films decreases with decreasing duty cycle, the ratio of the thickness to the pulse on-time shows a maximum of 273.3 nm/min at the lowest duty cycle of 5%. The obtained CrNx thin films show a mixture of the Cr2N and CrN phases. Moreover, the Cr-N bonding state and the percentages of CrN and Cr2N vary with the duty cycle. The effects of the duty cycle on the hardness, coefficient of friction, and corrosion behavior of the CrNx thin films are also investigated in this study.

  19. Evaluation of crack-healing behavior in SiNx/SiC nanolaminated thin film by microbending test

    NASA Astrophysics Data System (ADS)

    Nakatani, M.; Tonoya, Y.; Harada, Y.

    2015-03-01

    The purpose of this study is to evaluate the crack-healing behavior of SiNx/SiC nanolaminated films quantitatively. SiNx/SiC nanolaminated films were fabricated by alternating ion-beam assisted deposition of SiNx and SiC. The fabricated nanolaminated films consisted of four layers with the top layer being SiNx. Smooth and notched microbeam specimens were fabricated using a focused ion beam (FIB) system. The nanosized notch was introduced in form of an imitational crack on the film surface by FIB. Some notched samples were heated at 1000 ºC for 24 to 96 h in air. The fracture strength was evaluated by bending tests using a nanoindentation system. After heating, the notch was filled with reaction products. Energy dispersive X-ray (EDX) analysis revealed that the reaction products contained oxide compounds, most likely SiO2. The fracture load of the notched specimens recovered with increasing heating time. The filling of the notch with oxidation products caused the recovery of the fracture load. However, the recovery was not complete compared with the strength of a smooth sample. It is concluded that the filling of a notch with oxidation products recovers the mechanical strength of SiNx/SiC nanolaminated films only to a certain extent.

  20. 3-D habitat suitability of jack mackerel Trachurus murphyi in the Southeastern Pacific, a comprehensive study

    NASA Astrophysics Data System (ADS)

    Bertrand, Arnaud; Habasque, Jérémie; Hattab, Tarek; Hintzen, Niels T.; Oliveros-Ramos, Ricardo; Gutiérrez, Mariano; Demarcq, Hervé; Gerlotto, François

    2016-08-01

    South Pacific jack mackerel, Trachurus murphyi, has an ocean-scale distribution, from the South American coastline to New Zealand and Tasmania. This fish, captured by Humans since the Holocene, is nowadays heavily exploited and its population has decreased substantially since the mid-1990s. The uncertainty associated to jack mackerel population structure currently hampers management. Several hypotheses have been proposed from a single population up to several discrete populations. Still no definitive answer was given. Determining how environmental conditions drive jack mackerel distribution can provide insights on its population structure. To do so, here we performed in three steps. First, we used satellite data to develop a statistical model of jack mackerel horizontal habitat suitability. Model predictions based on interaction between temperature and chlorophyll-a match the observed jack mackerel distribution, even during extreme El Niño event. Second, we studied the impact of oxygen and show that jack mackerel distribution and abundance is correlated to oxygen over a wide variety of scales and avoid low oxygen areas and periods. Third, on the basis of the above we built a conceptual 3D model of jack mackerel habitat in the Southeastern Pacific. We reveal the presence of a low suitable habitat along the Chilean and Peruvian coast, figuratively presenting a closed door caused by a gap in the horizontal habitat at ∼19-22°S and a shallow oxycline off south-centre Peru. This kind of situation likely occurs on a seasonal basis, in austral summer but also at longer temporal scales. A lack of exchanges at some periods/seasons partially isolate jack mackerel distributed off Peru. On the other hand the continuity in the habitat during most of the year explains why exchanges occur. We conclude that the more likely population structure for jack mackerel is a pelagic metapopulation.

  1. Hydrogeological Characteristics of Fractured Rocks around the In-DEBS Test Borehole at the Underground Research Facility (KURT)

    NASA Astrophysics Data System (ADS)

    Ko, Nak-Youl; Kim, Geon Young; Kim, Kyung-Su

    2016-04-01

    In the concept of the deep geological disposal of radioactive wastes, canisters including high-level wastes are surrounded by engineered barrier, mainly composed of bentonite, and emplaced in disposal holes drilled in deep intact rocks. The heat from the high-level radioactive wastes and groundwater inflow can influence on the robustness of the canister and engineered barrier, and will be possible to fail the canister. Therefore, thermal-hydrological-mechanical (T-H-M) modeling for the condition of the disposal holes is necessary to secure the safety of the deep geological disposal. In order to understand the T-H-M coupling phenomena at the subsurface field condition, "In-DEBS (In-Situ Demonstration of Engineered Barrier System)" has been designed and implemented in the underground research facility, KURT (KAERI Underground Research Tunnel) in Korea. For selecting a suitable position of In-DEBS test and obtaining hydrological data to be used in T-H-M modeling as well as groundwater flow simulation around the test site, the fractured rock aquifer including the research modules of KURT was investigated through the in-situ tests at six boreholes. From the measured data and results of hydraulic tests, the range of hydraulic conductivity of each interval in the boreholes is about 10‑7-10‑8 m/s and that of influx is about 10‑4-10‑1 L/min for NX boreholes, which is expected to be equal to about 0.1-40 L/min for the In-DEBS test borehole (diameter of 860 mm). The test position was determined by the data and availability of some equipment for installing In-DEBS in the test borehole. The mapping for the wall of test borehole and the measurements of groundwater influx at the leaking locations was carried out. These hydrological data in the test site will be used as input of the T-H-M modeling for simulating In-DEBS test.

  2. Distinguishing primary and secondary inclusion assemblages in Jack Hills zircons

    NASA Astrophysics Data System (ADS)

    Bell, Elizabeth A.; Boehnke, Patrick; Hopkins-Wielicki, Michelle D.; Harrison, T. Mark

    2015-10-01

    Detrital igneous zircons from Jack Hills, Western Australia, range in age from ~ 3.0 to nearly 4.4 Ga and contain an inclusion assemblage dominated by quartz and muscovite, cited as evidence of their derivation from peraluminous granitoids. However, some phosphate inclusions in these zircons are known to be secondary from their post-depositional U-Pb ages and manifest mineralization along cracks. We undertook a survey of mineral inclusions in 4.3-3.0 Ga Jack Hills zircons with particular emphasis on their relationship to possible alteration features (e.g., cracks, disturbed internal zonation, and visual turbidity). Mineral inclusions revealed at polished surfaces show variations in modal mineralogy, mostly corresponding to their relationship with cracks. Muscovite is common both on and away from cracks, although the chemistry of muscovite inclusions shows little relationship with other potential alteration features. Inclusions filling cracks (secondary) and inclusions isolated from cracks differ in their modal mineralogy, although both suites are rich in muscovite and quartz. The higher incidence of crack-intersecting inclusions among younger zircons may reflect effects of the (generally larger) inclusion size among younger zircons. Mismatches between the isolated and crack-intersecting populations indicate selective loss of certain phases (e.g., feldspar, apatite) and over-representation of quartz and muscovite along cracks likely due to the effects of larger inclusion size and varying degrees of overpressure following zircon cooling and decompression. Inclusions not associated with cracks in magmatically zoned versus regions with disturbed zoning have similar phase proportions. This indicates only minor inclusion replacement away from cracks (i.e., the isolated assemblage is likely primary). This holds true also for inclusions within visually turbid versus clear volumes of zircon. Phase proportions within the inclusion assemblages differ with age indicating a

  3. Means and method for protecting apparatus situated in a borehole from closure of the borehole

    SciTech Connect

    Haberman, J.P.

    1983-08-16

    Apparatus, situated in a borehole traversing an earth formation, is protected from closure of the borehole by being encased in an inflatable device. Surface equipment inflates and maintains the inflatable device at a sufficient pressure so as to prevent the earth formation from closing in an contacting the apparatus.

  4. Experimental and theoretical investigation of the conduction band edge of GaNxP1-x

    NASA Astrophysics Data System (ADS)

    Güngerich, M.; Klar, P. J.; Heimbrodt, W.; Weiser, G.; Geisz, J. F.; Harris, C.; Lindsay, A.; O'Reilly, E. P.

    2006-12-01

    We show that a two-level band-anticrossing (BAC) model fails to describe the evolution of N-related states in GaNxP1-x . Band structure calculations prove that a two-level model describes these states in ordered GaNP supercells. Photocurrent measurements support a BAC-related blueshift of the GaP-like direct band gap in disordered GaNP, but calculations and electromodulated absorption and pressure studies show that the wide energy distribution of the lower-lying N-related states leads to the anticrossing interaction involving many N levels in disordered GaNP.

  5. Utilizing NX Advanced Simulation for NASA's New Mobile Launcher for Ares-l

    NASA Technical Reports Server (NTRS)

    Brown, Christopher

    2010-01-01

    This slide presentation reviews the use of NX to simulate the new Mobile Launcher (ML) for the Ares-I. It includes: a comparison of the sizes of the Saturn 5, the Space Shuttle, the Ares I, and the Ares V, with the height, and payload capability; the loads control plan; drawings of the base framing, the underside of the ML, beam arrangement, and the finished base and the origin of the 3D CAD data. It also reviews the modeling approach, meshing. the assembly Finite Element Modeling, the model summary. and beam improvements.

  6. SiNx Coatings Deposited by Reactive High Power Impulse Magnetron Sputtering: Process Parameters Influencing the Nitrogen Content.

    PubMed

    Schmidt, Susann; Hänninen, Tuomas; Goyenola, Cecilia; Wissting, Jonas; Jensen, Jens; Hultman, Lars; Goebbels, Nico; Tobler, Markus; Högberg, Hans

    2016-08-10

    Reactive high power impulse magnetron sputtering (rHiPIMS) was used to deposit silicon nitride (SiNx) coatings for biomedical applications. The SiNx growth and plasma characterization were conducted in an industrial coater, using Si targets and N2 as reactive gas. The effects of different N2-to-Ar flow ratios between 0 and 0.3, pulse frequencies, target power settings, and substrate temperatures on the discharge and the N content of SiNx coatings were investigated. Plasma ion mass spectrometry shows high amounts of ionized isotopes during the initial part of the pulse for discharges with low N2-to-Ar flow ratios of <0.16, while signals from ionized molecules rise with the N2-to-Ar flow ratio at the pulse end and during pulse-off times. Langmuir probe measurements show electron temperatures of 2-3 eV for nonreactive discharges and 5.0-6.6 eV for discharges in transition mode. The SiNx coatings were characterized with respect to their composition, chemical bond structure, density, and mechanical properties by X-ray photoelectron spectroscopy, X-ray reflectivity, X-ray diffraction, and nanoindentation, respectively. The SiNx deposition processes and coating properties are mainly influenced by the N2-to-Ar flow ratio and thus by the N content in the SiNx films and to a lower extent by the HiPIMS frequencies and power settings as well as substrate temperatures. Increasing N2-to-Ar flow ratios lead to decreasing growth rates, while the N content, coating densities, residual stresses, and the hardness increase. These experimental findings were corroborated by density functional theory calculations of precursor species present during rHiPIMS. PMID:27414283

  7. Seismoelectric Wave Measurements in Borehole Models

    NASA Astrophysics Data System (ADS)

    Wang, J.; Hu, H.; Guan, W.

    2014-12-01

    An experimental system was built in the laboratory based on the electrokinetic theory, which contains a small scaled seismoelectric detector and a high resolution digitizer ( 1 MS/s, 22 bits ). The electrokinetic measurements are carried out with seismoelectric well logging technique in borehole models at high frequency (90 kHz), and the localized electrokinetic fields that accompany compressional wave, shear wave and Stoneley wave are clearly observed with monopole source in two sandstone models that are saturated by tap water. The magnitudes of these seismoelectric waves are in the range of 1-100 microvolt, which is useful for designing the seismoelectric logging instruments. The experimental results also show that the seismoelectric well logging signals are related to the permeability of borehole formations. Their amplitudes become larger in the high permeability model, which can be used to measure the permeability of rock formation although no such relationship has ever been provided in existing theories. We also made seismoelectric measurements in a lucite borehole model, but no observable seismoelectric signals were recorded by the electrode. This is not out of our expectation because the lucite formation is not porous and no electrokinetic conversion occurs in such material. However, the electric signal recorded in the Lucite borehole represents the background noise of our measurement system, which is less than 0.5 microvolt. This study verifies the feasibility of seismoelectric well logging, and also presents the range of seismoelectric signals in borehole saturated by tap water that is much closer to the condition of actual formation.

  8. Inverse borehole coupling filters and their applications

    SciTech Connect

    Peng, C.

    1994-12-31

    This paper describes a new procedure for processing VSP and crosswell data acquired using an array of hydrophone. The procedure consists of three steps. In the first step the authors apply an inverse borehole coupling equation to convert hydrophone pressure data into borehole squeeze pressure data, by which the tube waves are significantly attenuated and the P-wave and S-wave are partially compensated for the borehole effects. In the second step, they make use of a partial differential equation that relates the borehole squeeze pressure to the pressure of the incident P-wave. In the third step, they show that one can also map the hydrophone pressure data into the geophone response, provided that both the P-wave and S-wave velocity profiles along the borehole are known. Several synthetic examples are used to demonstrate its accuracy. The Kent Cliffs hydrophone data are successfully processed using the above steps, and the data quality is found to be significantly improved.

  9. AmeriFlux US-Wi9 Young Jack pine (YJP)

    SciTech Connect

    Chen, Jiquan

    2016-01-01

    This is the AmeriFlux version of the carbon flux data for the site US-Wi9 Young Jack pine (YJP). Site Description - The Wisconsin Young Jack Pine site is located in the Washburn Ranger District of the northeastern section of Chequamegon National Forest. A member of the northern coniferous-deciduous biome, surveys from the mid-19th century indicate the region consisted of a mixed stand of red, white, and jack pines. After extensive timber harvesting, wildfires, and farming activity, the region turned into a fragmented mosaic of stands of various ages and composition. As an assemblage, the ten Wisconsin sites are indicative of the successional stages of development in the predominant stand types of a physically homogeneous landscape. Clearcut on 40 to 70 year intervals, jack pine stands occupy approximately 13% of the region.

  10. AmeriFlux US-Wi5 Mixed young jack pine (MYJP)

    SciTech Connect

    Chen, Jiquan

    2016-01-01

    This is the AmeriFlux version of the carbon flux data for the site US-Wi5 Mixed young jack pine (MYJP). Site Description - The Wisconsin Mixed Young Jack Pine site is located in the Washburn Ranger District of the northeastern section of Chequamegon National Forest. A member of the northern coniferous-deciduous biome, surveys from the mid-19th century indicate the region consisted of a mixed stand of red, white, and jack pines. After extensive timber harvesting, wildfires, and farming activity, the region turned into a fragmented mosaic of stands of various ages and composition. As an assemblage, the ten Wisconsin sites are indicative of the successional stages of development in the predominant stand types of a physically homogeneous landscape. Clearcut on 40 to 70 year intervals, jack pine stands occupy approximately 13% of the region.

  11. 2. Jack Boucher,photographer, July 1971. Scenic view along river showing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Jack Boucher,photographer, July 1971. Scenic view along river showing Erie railroad line, Taken from Rt. 97 at Hawks Nest, New York. - Erie Railway, New Jersey, New York, Pennsylvania, Deposit, Broome County, NY

  12. View of astronaut Jack Lousma in the Shuttle spacesuits (EMU) at bldg 29

    NASA Technical Reports Server (NTRS)

    1981-01-01

    Portrait view of astronaut Jack Lousma in the Extravehicular Mobility Unit (EMU) at bldg 29 Weightless Environment Training Facility (WETF). He is wearing the full extravehicular mobility unit and is standing on platform about to be lowered into the water.

  13. Heavy duty precision leveling jacks expedite setup time on horizontal boring mill

    NASA Technical Reports Server (NTRS)

    Dellenbaugh, W.; Jones, C.

    1966-01-01

    Leveling jack is a precise alignment tool which expedites the setup of components or assemblies up to 2500 pounds on horizontal boring mills. This tool eliminates the necessity of wedges and blocks to shim the components to proper position.

  14. Generalized Jack polynomials and the AGT relations for the SU(3) group

    NASA Astrophysics Data System (ADS)

    Mironov, S.; Morozov, A.; Zenkevich, Y.

    2014-03-01

    We find generalized Jack polynomials for the SU(3) group and verify that their Selberg averages for several first levels are given by Nekrasov functions. To compute the averages, we derive recurrence relations for the Selberg integrals.

  15. Oxidation and thermal fatigue of coated and uncoated NX-188 nickel-base alloy in a high velocity gas stream

    NASA Technical Reports Server (NTRS)

    Johnson, J. R.; Young, S. G.

    1972-01-01

    A cast nickel-base superalloy, NX-188, coated and uncoated, was tested in a high-velocity gas stream for resistance to oxidation and thermal fatigue by cycling between room temperature and 980, 1040, and 1090 C. Contrary to the behavior of more conventional nickel-base alloys, uncoated NX-188 exhibited the greatest weight loss at the lowest test temperature. In general, on the basis of weight change and metallographic observations a coating consisting of vapor-deposited Fe-Cr-Al-Y over a chromized substrate exhibited the best overall performance in resistance to oxidation and thermal fatigue.

  16. Gamma-ray spectral calculations for uranium borehole logging

    SciTech Connect

    Close, D.A.; Evans, M.L.; Jain, M.

    1980-06-01

    Gamma-ray transport calculations were performed to determine the energy distribution of gamma rays inside a borehole introduced into an infinite medium. The gamma rays from the naturally occurring radioactive isotopes of potassium, thorium, and uranium were uniformly distributed in a sandstone formation (having a porosity of 0.30 and a saturation of 1.0) surrounding the borehole. A sonde was placed coaxially inside the borehole. Parametric studies were done to determine how the borehole radius, borehole fluid, and borehole casing influence the gamma-ray flux inside the sonde.

  17. CFD Analysis of Thermal Control System Using NX Thermal and Flow

    NASA Technical Reports Server (NTRS)

    Fortier, C. R.; Harris, M. F. (Editor); McConnell, S. (Editor)

    2014-01-01

    The Thermal Control Subsystem (TCS) is a key part of the Advanced Plant Habitat (APH) for the International Space Station (ISS). The purpose of this subsystem is to provide thermal control, mainly cooling, to the other APH subsystems. One of these subsystems, the Environmental Control Subsystem (ECS), controls the temperature and humidity of the growth chamber (GC) air to optimize the growth of plants in the habitat. The TCS provides thermal control to the ECS with three cold plates, which use Thermoelectric Coolers (TECs) to heat or cool water as needed to control the air temperature in the ECS system. In order to optimize the TCS design, pressure drop and heat transfer analyses were needed. The analysis for this system was performed in Siemens NX Thermal/Flow software (Version 8.5). NX Thermal/Flow has the ability to perform 1D or 3D flow solutions. The 1D flow solver can be used to represent simple geometries, such as pipes and tubes. The 1D flow method also has the ability to simulate either fluid only or fluid and wall regions. The 3D flow solver is similar to other Computational Fluid Dynamic (CFD) software. TCS performance was analyzed using both the 1D and 3D solvers. Each method produced different results, which will be evaluated and discussed.

  18. Low temperature SiNx:H films deposited by inductively coupled plasma for solar cell applications

    NASA Astrophysics Data System (ADS)

    Zhou, H. P.; Wei, D. Y.; Xu, L. X.; Guo, Y. N.; Xiao, S. Q.; Huang, S. Y.; Xu, S.

    2013-01-01

    Amorphous hydrogenated silicon nitride thin films with different chemical compositions (SiNx:H) have been synthesized by using low frequency inductively coupled plasma of Si + N2 + H2 at a low temperature of 100 °C. The bonding configurations, bond density, hydrogen content, and chemical composition, as well as the refractive index are intensively investigated by a variety of characterization tools. Silicon nitride based antireflection layer on alkaline-textured silicon surface reduces the reflectivity to about 4%. As-deposited silicon nitride films exhibit an excellent passivation effect on p- and n-type Si. The surface recombination velocity is reduced to 36 cm/s on n-type silicon with resistivity of 2-3 Ω cm. The passivation effect originates from the H-related chemical passivation and fixed charge related field passivation. The growth mechanism of SiNx:H from the precursor gas of H2 diluted mixture of silane and nitrogen is also discussed.

  19. Molecular metal-Nx centres in porous carbon for electrocatalytic hydrogen evolution

    NASA Astrophysics Data System (ADS)

    Liang, Hai-Wei; Brüller, Sebastian; Dong, Renhao; Zhang, Jian; Feng, Xinliang; Müllen, Klaus

    2015-08-01

    Replacement of precious platinum with efficient and low-cost catalysts for electrocatalytic hydrogen evolution at low overpotentials holds tremendous promise for clean energy devices. Here we report a novel type of robust cobalt-nitrogen/carbon catalyst for the hydrogen evolution reaction (HER) that is prepared by the pyrolysis of cobalt-N4 macrocycles or cobalt/o-phenylenediamine composites and using silica colloids as a hard template. We identify the well-dispersed molecular CoNx sites on the carbon support as the active sites responsible for the HER. The CoNx/C catalyst exhibits extremely high turnover frequencies per cobalt site in acids, for example, 0.39 and 6.5 s-1 at an overpotential of 100 and 200 mV, respectively, which are higher than those reported for other scalable non-precious metal HER catalysts. Our results suggest the great promise of developing new families of non-precious metal HER catalysts based on the controlled conversion of homogeneous metal complexes into solid-state carbon catalysts via economically scalable protocols.

  20. The ML1Nx2 Phosphatidylinositol 3,5-Bisphosphate Probe Shows Poor Selectivity in Cells

    PubMed Central

    Hammond, Gerald R. V.; Takasuga, Shunsuke; Sasaki, Takehiko; Balla, Tamas

    2015-01-01

    Phosphatidylinositol (3,5)-bisphosphate (PtdIns(3,5)P2) is a quantitatively minor phospholipid in eukaryotic cells that plays a fundamental role in regulating endocytic membrane traffic. Despite its clear importance for cellular function and organism physiology, mechanistic details of its biology have so far not been fully elucidated. In part, this is due to a lack of experimental tools that specifically probe for PtdIns(3,5)P2 in cells to unambiguously identify its dynamics and site(s) of action. In this study, we have evaluated a recently reported PtdIns(3,5)P2 biosensor, GFP-ML1Nx2, for its veracity as such a probe. We report that, in live cells, the localization of this biosensor to sub-cellular compartments is largely independent of PtdIns(3,5)P2, as assessed after pharmacological, chemical genetic or genomic interventions that block the lipid’s synthesis. We therefore conclude that it is unwise to interpret the localization of ML1Nx2 as a true and unbiased biosensor for PtdIns(3,5)P2. PMID:26460749

  1. Molecular metal–Nx centres in porous carbon for electrocatalytic hydrogen evolution

    PubMed Central

    Liang, Hai-Wei; Brüller, Sebastian; Dong, Renhao; Zhang, Jian; Feng, Xinliang; Müllen, Klaus

    2015-01-01

    Replacement of precious platinum with efficient and low-cost catalysts for electrocatalytic hydrogen evolution at low overpotentials holds tremendous promise for clean energy devices. Here we report a novel type of robust cobalt–nitrogen/carbon catalyst for the hydrogen evolution reaction (HER) that is prepared by the pyrolysis of cobalt–N4 macrocycles or cobalt/o-phenylenediamine composites and using silica colloids as a hard template. We identify the well-dispersed molecular CoNx sites on the carbon support as the active sites responsible for the HER. The CoNx/C catalyst exhibits extremely high turnover frequencies per cobalt site in acids, for example, 0.39 and 6.5 s−1 at an overpotential of 100 and 200 mV, respectively, which are higher than those reported for other scalable non-precious metal HER catalysts. Our results suggest the great promise of developing new families of non-precious metal HER catalysts based on the controlled conversion of homogeneous metal complexes into solid-state carbon catalysts via economically scalable protocols. PMID:26250525

  2. Excess plutonium disposition: The deep borehole option

    SciTech Connect

    Ferguson, K.L.

    1994-08-09

    This report reviews the current status of technologies required for the disposition of plutonium in Very Deep Holes (VDH). It is in response to a recent National Academy of Sciences (NAS) report which addressed the management of excess weapons plutonium and recommended three approaches to the ultimate disposition of excess plutonium: (1) fabrication and use as a fuel in existing or modified reactors in a once-through cycle, (2) vitrification with high-level radioactive waste for repository disposition, (3) burial in deep boreholes. As indicated in the NAS report, substantial effort would be required to address the broad range of issues related to deep bore-hole emplacement. Subjects reviewed in this report include geology and hydrology, design and engineering, safety and licensing, policy decisions that can impact the viability of the concept, and applicable international programs. Key technical areas that would require attention should decisions be made to further develop the borehole emplacement option are identified.

  3. Development of a geothermal acoustic borehole televiewer

    SciTech Connect

    Heard, F.E.; Bauman, T.J.

    1983-08-01

    Most geothermal wells are drilled in hard rock formations where fluid flow is through systems of open fractures. Productivity of these wells is usually determined by the extent of intersection of the wellbore with the fracture system. A need exists for fracture mapping methods and tools which can operate in a geothermal environment. In less hostile environments, the acoustic borehole televiewer has been shown to be a useful tool for determining location, orientation, and characterization of fractures as they intersect the borehole and for general wellbore and casing inspection. The development conducted at Sandia National Laboratories to adapt an acoustic borehole televiewer for operation in a geothermal environment is described. The modified instrument has been successfully tested at temperatures as high as 280/sup 0/C and pressures up to 5000 psi, and used successfully to map fractures and casing damage in geothermal wells.

  4. VTT test borehole for bedrock investigations

    NASA Astrophysics Data System (ADS)

    Okko, Olli; Hassinen, Pertti; Front, Kai

    1994-02-01

    A borehole of depth 150 m and diameter 56 mm has been drilled in the area adjacent to the premises of the Technical Research Center of Finland (VTT) at Otaniemi, Espoo, for the purposes of calibrating geophysical measurement devices. The report presents the test results obtained so far and illustrates the processing of these, in which the various measurements are plotted as curves and combinations of curves. The interpretations provided so far consist of analyses of lithological variations, bedrock fracturing, the nature and occurrence of fracture zones and groundwater flow patterns. Samples were taken from those parts of the core shown by the borehole measurements to be homogeneous and thin sections made from these for mineralogical determinations. The rock mechanical and petrophysical properties of the same points were examined. The core is in the possession of VTT, and the hole itself is available to outsiders for the calibration and testing of borehole measurement equipment.

  5. Jack Rabbit Pretest Shadowplate Drawings For TATB IHE Model Development

    SciTech Connect

    Hart, M M; McDaniel, D W

    2009-07-10

    The Jack Rabbit Pretest (PT) series consisted of 5 focused hydrodynamic experiments 2021E PT3, PT4, PT5, PT6, and PT7. They were fired in March and April of 2008 at the Contained Firing Facility, Site 300, Lawrence Livermore National Laboratory, Livermore, California. These experiments measured deadzone formation and impulse gradients created during the detonation of TATB based insensitive high explosive. When setting up computer simulations of the Jack Rabbit Pretest series, the modeler or code developer can execute simulations with increasing degrees of refinement using detail found in the shadowplate design. The easiest way to get started is by treating the shadowplate in each experiment as a monolithic homogeneous piece of stainless steel. The simulation of detonation would begin as a point initiation below the center, bottom surface of the shadowplate. The detonation running through the ultrafine TATB booster can be simulated using program burn and then switched over to a reactive flow detonation model as the detonation front crosses the boundary into the main charge LX-17 IHE. A modeler wanting to further refine the simulation and progression of shock through the shadowplate can use the more detailed shadowplate design information presented in this document. The source drawings are included in Appendix A of this document. Their titles and drawing numbers are listed. Each experiment's shadowplate consists of two major components. A 303 stainless steel shape that defines the outer dimensions of shadowplate and a cylindrical 303 stainless steel detonator housing that is located in a closely machined pocket in the shape. The SIMPLE ASSY drawing accurately represents the dimensions of the outer shape, it's machined cylindrical pocket, and detonator body which is treated as a monolithic, homogeneous piece of stainless steel. The detonator body cross section shows an accurately dimensioned void where the slapper flyer barrel, LX-16 (pressed PETN) pellet, and pellet

  6. Using borehole geophysics and cross-borehole flow testing to define hydraulic connections between fracture zones in bedrock aquifers

    USGS Publications Warehouse

    Paillet, Frederick L.

    1993-01-01

    Nearly a decade of intensive geophysical logging at fractured rock hydrology research sites indicates that geophysical logs can be used to identify and characterize fractures intersecting boreholes. However, borehole-to-borehole flow tests indicate that only a few of the apparently open fractures found to intersect boreholes conduct flow under test conditions. This paper presents a systematic approach to fracture characterization designed to define the distribution of fractures along boreholes, relate the measured fracture distribution to structure and lithology of the rock mass, and define the nature of fracture flow paths across borehole arrays. Conventional electrical resistivity, gamma, and caliper logs are used to define lithology and large-scale structure. Borehole wall image logs obtained with the borehole televiewer are used to give the depth, orientation, and relative size of fractures in situ. High-resolution flowmeter measurements are used to identify fractures conducting flow in the rock mass adjacent to the boreholes. Changes in the flow field over time are used to characterize the hydraulic properties of fracture intersections between boreholes. Application of this approach to an array of 13 boreholes at the Mirror Lake, New Hamsphire site demonstrates that the transient flow analysis can be used to distinguish between fractures communicating with each other between observation boreholes, and those that are hydraulically isolated from each other in the surrounding rock mass. The Mirror Lake results also demonstrate that the method is sensitive to the effects of boreholes on the hydraulic properties of the fractured-rock aquifer. Experiments conducted before and after the drilling of additional boreholes in the array and before and after installation of packers in existing boreholes demonstrate that the presence of new boreholes or the inflation of packers in existing boreholes has a large effect on the measured hydraulic properties of the rock mass

  7. Jacking mechanism for upper internals structure of a liquid metal nuclear reactor

    SciTech Connect

    Gillett, James E.; Wineman, Arthur L.

    1984-01-01

    A jacking mechanism for raising the upper internals structure of a liquid metal nuclear reactor which jacking mechanism uses a system of gears and drive shafts to transmit force from a single motor to four mechanically synchronized ball jacks to raise and lower support columns which support the upper internals structure. The support columns have a pin structure which rides up and down in a slot in a housing fixed to the reactor head. The pin has two locking plates which can be rotated around the pin to bring bolt holes through the locking plates into alignment with a set of bolt holes in the housing, there being a set of such housing bolt holes corresponding to both a raised and a lowered position of the support column. When the locking plate is so aligned, a surface of the locking plate mates with a surface in the housing such that the support column is then supported by the locking plate and not by the ball jacks. Since the locking plates are to be installed and bolted to the housing during periods of reactor operation, the ball jacks need not be sized to react the large forces which occur or potentially could occur on the upper internals structure of the reactor during operation. The locking plates react these loads. The ball jacks, used only during refueling, can be smaller, which enable conventionally available equipment to fulfill the precision requirements for the task within available space.

  8. Comparative analysis of a jack-up drilling unit with different leg systems

    NASA Astrophysics Data System (ADS)

    Ren, Xiangang; Bai, Yong; Jia, Lusheng

    2012-09-01

    The jack-up unit is one of the best drilling platforms in offshore oil fields with water depth shallower than 150 meters. As the most pivotal component of the jack-up unit, the leg system can directly affect the global performance of a jack-up unit. Investigation shows that there are three kinds of leg structure forms in the world now: the reverse K, X, and mixing types. In order to clarify the advantage and defects of each one, as well as their effect on the global performance of the jack-up unit, this paper commenced to study performance targets of a deepwater jack-up unit with different leg systems (X type, reverse K type, and mixing type). In this paper a typical leg scantling dimension and identical external loads were selected, detailed finite element snalysis (FEA) models were built to simulate the jack-up unit's structural behavior, and the multi-point constraint (MPC) element together with the spring element was used to deal with the boundary condition. Finally, the above problems were solved by comparative analysis of their main performance targets (including ultimate static strength, dynamic response, and weight).

  9. Borehole Summary Report for C4997 Rotary Drilling, WTP Seismic Boreholes Project, CY 2006

    SciTech Connect

    Difebbo, Thomas J.

    2007-02-28

    The following Final Geologic Borehole Report briefly describes the drilling of a single borehole at the Waste Treatment Plant (WTP) on the Hanford, Washington, U.S. Department of Energy (DOE) reservation. The location of the WTP is illustrated in Figure 1-1. The borehole was designated as “C4997”, and was drilled to obtain seismic and lithologic data for the Pretreatment Facility and High-Level Waste Vitrification Plant in the WTP. Borehole C4997 was drilled and logged to a total depth of 1428 ft below ground surface (bgs) on October 8, 2006, and was located approximately 150 ft from a recently cored borehole, designated as “C4998”. Pacific Northwest National Laboratory (PNNL) determined the locations for C4997, C4998, and other boreholes at the WTP in cooperation with the U.S. Army Corps of Engineers (USACE) Review Panel, and the Defense Nuclear Facilities Safety Board (DNFSB). The total depth of Borehole C4997 was also determined by PNNL.

  10. Borehole temperature variability at Hoher Sonnblick, Austria

    NASA Astrophysics Data System (ADS)

    Heinrich, Georg; Schöner, Wolfgang; Prinz, Rainer; Pfeiler, Stefan; Reisenhofer, Stefan; Riedl, Claudia

    2016-04-01

    The overarching aim of the project 'Atmosphere - permafrost relationship in the Austrian Alps - atmospheric extreme events and their relevance for the mean state of the active layer (ATMOperm)' is to improve the understanding of the impacts of atmospheric extreme events on the thermal state of the active layer using a combined measurement and modeling approach as the basis for a long-term monitoring strategy. For this purpose, the Sonnblick Observatory at the summit of Hoher Sonnblick (3106 m.a.s.l) is particularly well-suited due to its comprehensive long-term atmospheric and permafrost monitoring network (i.a. three 20 m deep boreholes since 2007). In ATMOperm, a robust and accurate permanent monitoring of active layer thickness at Hoher Sonnblick will be set up using innovative monitoring approaches by automated electrical resistivity tomography (ERT). The ERT monitoring is further supplemented by additional geophysical measurements such as ground penetrating radar, refraction seismic, electromagnetic induction and transient electromagnetics in order to optimally complement the gained ERT information. On the other hand, atmospheric energy fluxes over permafrost ground and their impact on the thermal state of permafrost and active layer thickness with a particular focus on atmospheric extreme events will be investigated based on physically-based permafrost modeling. For model evaluation, the borehole temperature records will play a key role and, therefore, an in-depth quality control of the borehole temperatures is an important prerequisite. In this study we will show preliminary results regarding the borehole temperature variability at Hoher Sonnblick with focus on the active layer. The borehole temperatures will be related to specific atmospheric conditions using the rich data set of atmospheric measurements of the site in order to detect potential errors in the borehole temperature measurements. Furthermore, we will evaluate the potential of filling gaps in

  11. Radiation pattern of a borehole radar antenna

    USGS Publications Warehouse

    Ellefsen, K.J.; Wright, D.L.

    2002-01-01

    To understand better how a borehole antenna radiates radar waves into a formation, this phenomenon is simulated numerically using the finite-difference, time-domain method. The simulations are of two different antenna models that include features like a driving point fed by a coaxial cable, resistive loading of the antenna, and a water-filled borehole. For each model, traces are calculated in the far-field region, and then, from these traces, radiation patterns are calculated. The radiation patterns show that the amplitude of the radar wave is strongly affected by its frequency, its propagation direction, and the resistive loading of the antenna.

  12. CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY: Large Storage Window in a-SiNx/nc-Si/a-SiNx Sandwiched Structure for Nanocrystalline Silicon Floating Gate Memory Application

    NASA Astrophysics Data System (ADS)

    Wang, Xiang; Huang, Jian; Ding, Hong-Lin; Zhang, Xian-Gao; Yu, Lin-Wei; Huang, Xin-Fan; Li, Wei; Chen, Kun-Ji

    2008-07-01

    An a-SiNx/nanocrystalline silicon [(nc-Si)/a-SiNx] sandwiched structure is fabricated in a plasma enhanced chemical vapour deposition (PECVD) system at low temperature (250° C). The nc-Si layer is fabricated from a hydrogen-diluted silane mixture gas by using a layer-by-layer deposition technique. Atom force microscopy measurement shows that the density of nc-Si is about 2 × 1011 cm-2. By the pretreatment of plasma nitridation, low density of interface states and high-quality interface between the Si substrate and a-SiNx insulator layer are obtained. The density of interface state at the midgap is calculated to be 1 × 1010 cm-2eV-1 from the quasistatic and high frequency C - V data. The charging and discharging property of nc-Si quantum dots is studied by capacitance-voltage (C - V) measurement at room temperature. An ultra-large hysteresis is observed in the C - V characteristics, which is attributed to storage of the electrons and holes into the nc-Si dots. The long-term charge-loss process is studied and ascribed to low density of interface states at SiNx/Si substrate.

  13. Method for isolating two aquifers in a single borehole

    DOEpatents

    Burklund, Patrick W.

    1985-10-22

    A method for isolating and individually instrumenting separate aquifers within a single borehole. A borehole is first drilled from the ground surface, through an upper aquifer, and into a separating confining bed. A casing, having upper and lower sections separated by a coupling collar, is lowered into the borehole. The borehole is grouted in the vicinity of the lower section of the casing. A borehole is then drilled through the grout plug and into a lower aquifer. After the lower aquifer is instrumented, the borehole is grouted back into the lower portion of the casing. Then the upper section of the casing is unscrewed via the coupling collar and removed from the borehole. Finally, instrumentation is added to the upper aquifer and the borehole is appropriately grouted. The coupling collar is designed to have upper right-hand screw threads and lower left-hand screw thread, whereby the sections of the casing can be readily separated.

  14. Method for isolating two aquifers in a single borehole

    DOEpatents

    Burklund, P.W.

    1984-01-20

    A method for isolating and individually instrumenting separate aquifers within a single borehole is disclosed. A borehole is first drilled from the ground surface, through an upper aquifer, and into a separating confining bed. A casing, having upper and lower sections separated by a coupling collar, is lowered into the borehole. The borehole is grouted in the vicinity of the lower section of the casing. A borehole is then drilled through the grout plug and into a lower aquifer. After the lower aquifer is instrumented, the borehole is grouted back into the lower portion of the casing. Then the upper section of the casing is unscrewed via the coupling collar and removed from the borehole. Finally, instrumentation is added to the upper aquifer and the borehole is appropriately grouted. The coupling collar is designed to have upper right-hand screw threads and lower left-hand screw thread, whereby the sections of the casing can be readily separated.

  15. Multi-function magnetic jack control drive mechanism

    DOEpatents

    Bollinger, Lawrence R.; Crawford, Donald C.

    1986-01-01

    A multi-function magnetic jack control drive mechanism for controlling a nuclear reactor is provided. The mechanism includes an elongate pressure housing in which a plurality of closely spaced drive rods are located. Each drive rod is connected to a rod which is insertable in the reactor core. An electromechanical stationary latch device is provided which is actuatable to hold each drive rod stationary with respect to the pressure housing. An electromechanical movable latch device is also provided for each one of the drive rods. Each movable latch device is provided with a base and is actuatable to hold a respective drive rod stationary with respect to the base. An electromechanical lift device is further provided for each base which is actuatable for moving a respective base longitudinally along the pressure housing. In this manner, one or more drive rods can be moved in the pressure housing by sequentially and repetitively operating the electromechanical devices. Preferably, each latch device includes a pair of opposed latches which grip teeth located on the respective drive rod. Two, three, or four drive rods can be located symmetrically about the longitudinal axis of the pressure housing.

  16. Multi-function magnetic jack control drive mechanism

    DOEpatents

    Bollinger, L.R.; Crawford, D.C.

    1983-10-06

    A multi-function magnetic jack control drive mechanism for controlling a nuclear reactor is provided. The mechanism includes an elongate pressure housing in which a plurality of closely spaced drive rods are located. Each drive rod is connected to a rod which is insertable in the reactor core. An electromechanical stationary latch device is provided which is actuatable to hold each drive rod stationary with respect to the pressure housing. An electromechanical movable latch device is also provided for each one of the drive rods. Each movable latch device is provided with a base and is actuatable to hold a respective drive rod stationary with respect to the base. An electromechanical lift device is further provided for each base which is actuatable for moving a respective base longitudinally along the pressure housing. In this manner, one or more drive rods can be moved in the pressure housing by sequentially and repetitively operating the electromechanical devices. Preferably, each latch device includes a pair of opposed latches which grip teeth located on the respective drive rod. Two, three, or four drive rods can be located symmetrically about the longitudinal axis of the pressure housing.

  17. Jack Rabbit Pretest Data For TATB Based IHE Model Development

    SciTech Connect

    Hart, M M; Strand, O T; Bosson, S T

    2008-06-18

    The Jack Rabbit Pretest series consisted of 5 focused hydrodynamic experiments, 2021E PT3, PT4, PT5, PT6, and PT7. They were fired in March and April of 2008 at the Contained Firing Facility, Site 300, Lawrence Livermore National Laboratory, Livermore, California. These experiments measured dead-zone formation and impulse gradients created during the detonation of TATB based insensitive high explosive. This document contains reference data tables for all 5 experiments. These data tables include: (1) Measured laser velocimetry of the experiment diagnostic plate (2) Computed diagnostic plate profile contours through velocity integration (3) Computed center axis pressures through velocity differentiation. All times are in microseconds, referenced from detonator circuit current start. All dimensions are in millimeters. Schematic axi-symmetric cross sections are shown for each experiment. These schematics detail the materials used and dimensions of the experiment and component parts. This should allow anyone wanting to evaluate their TATB based insensitive high explosive detonation model against experiment. These data are particularly relevant in examining reactive flow detonation model prediction in computational simulation of dead-zone formation and resulting impulse gradients produced by detonating TATB based explosive.

  18. Defect reduction of SiNx embedded m-plane GaN grown by hydride vapor phase epitaxy

    NASA Astrophysics Data System (ADS)

    Woo, Seohwi; Kim, Minho; So, Byeongchan; Yoo, Geunho; Jang, Jongjin; Lee, Kyuseung; Nam, Okhyun

    2014-12-01

    Nonpolar (1 0 -1 0) m-plane GaN has been grown on m-plane sapphire substrates by hydride vapor phase epitaxy (HVPE). We studied the defect reduction of m-GaN with embedded SiNx interlayers deposited by ex-situ metal organic chemical vapor deposition (MOCVD). The full-width at half-maximum values of the X-ray rocking curves for m-GaN with embedded SiNx along [1 1 -2 0]GaN and [0 0 0 1]GaN were reduced to 528 and 1427 arcs, respectively, as compared with the respective values of 947 and 3170 arcs, of m-GaN without SiNx. Cross-section transmission electron microscopy revealed that the basal stacking fault density was decreased by approximately one order to 5×104 cm-1 due to the defect blocking of the embedded SiNx. As a result, the near band edge emission intensities of the room-temperature and low-temperature photoluminescence showed approximately two-fold and four-fold improvement, respectively.

  19. Additive and non-additive genetic components of the jack male life history in Chinook salmon (Oncorhynchus tshawytscha).

    PubMed

    Forest, Adriana R; Semeniuk, Christina A D; Heath, Daniel D; Pitcher, Trevor E

    2016-08-01

    Chinook salmon, Oncorhynchus tshawytscha, exhibit alternative reproductive tactics (ARTs) where males exist in two phenotypes: large "hooknose" males and smaller "jacks" that reach sexual maturity after only 1 year in seawater. The mechanisms that determine "jacking rate"-the rate at which males precociously sexually mature-are known to involve both genetics and differential growth rates, where individuals that become jacks exhibit higher growth earlier in life. The additive genetic components have been studied and it is known that jack sires produce significantly more jack offspring than hooknose sires, and vice versa. The current study was the first to investigate both additive and non-additive genetic components underlying jacking through the use of a full-factorial breeding design using all hooknose sires. The effect of dams and sires descendant from a marker-assisted broodstock program that identified "high performance" and "low performance" lines using growth- and survival-related gene markers was also studied. Finally, the relative growth of jack, hooknose, and female offspring was examined. No significant dam, sire, or interaction effects were observed in this study, and the maternal, additive, and non-additive components underlying jacking were small. Differences in jacking rates in this study were determined by dam performance line, where dams that originated from the low performance line produced significantly more jacks. Jack offspring in this study had a significantly larger body size than both hooknose males and females starting 1 year post-fertilization. This study provides novel information regarding the genetic architecture underlying ARTs in Chinook salmon that could have implications for the aquaculture industry, where jacks are not favoured due to their small body size and poor flesh quality. PMID:27450674

  20. BOREHOLE FLOWMETERS: FIELD APPLICATION AND DATA ANALYSIS

    EPA Science Inventory

    This paper reviews application of borehole flowmeters in granular and fractured rocks. Basic data obtained in the field are the ambient flow log and the pumping-induced flow log. These basic logs may then be used to calculate other quantities of interest. The paper describes the ...

  1. BOREHOLE FLOWMETERS: FIELD APPLICATION AND DATA ANALYSIS

    EPA Science Inventory

    This paper reviews application of borehole flowmeters in granular and fractured rocks. asic data obtained in the field are the ambient flow log and the pumping-induced flow log. hese basic logs may then be used to calculate other quantities of interest. he paper describes the app...

  2. Radiation pattern of a borehole radar antenna

    USGS Publications Warehouse

    Ellefsen, K.J.; Wright, D.L.

    2005-01-01

    The finite-difference time-domain method was used to simulate radar waves that were generated by a transmitting antenna inside a borehole. The simulations were of four different models that included features such as a water-filled borehole and an antenna with resistive loading. For each model, radiation patterns for the far-field region were calculated. The radiation patterns show that the amplitude of the radar wave was strongly affected by its frequency, the water-filled borehole, the resistive loading of the antenna, and the external metal parts of the antenna (e.g., the cable head and the battery pack). For the models with a water-filled borehole, their normalized radiation patterns were practically identical to the normalized radiation pattern of a finite-length electric dipole when the wavelength in the formation was significantly greater than the total length of the radiating elements of the model antenna. The minimum wavelength at which this criterion was satisfied depended upon the features of the antenna, especially its external metal parts. ?? 2005 Society of Exploration Geophysicists. All rights reserved.

  3. Entry Boreholes Summary Report for the Waste Treatment Plant Seismic Boreholes Project

    SciTech Connect

    Horner, Jake A.

    2007-02-28

    This report describes the 2006 fiscal year field activities associated with the installation of four cable-tool-drilled boreholes located within the boundary of the Waste Treatment Plant (WTP), DOE Hanford site, Washington. The cable-tool-drilled boreholes extend from surface to ~20 ft below the top of basalt and were utilized as cased entry holes for three deep boreholes (approximately 1400 ft) that were drilled to support the acquisition of sub-surface geophysical data, and one deep corehole (1400 ft) that was drilled to acquire continuous core samples from underlying basalt and sedimentary interbeds. The geophysical data acquired from these boreholes will be integrated into a seismic response model that will provide the basis for defining the seismic design criteria for the WTP facilities.

  4. 30 CFR 75.1315 - Boreholes for explosives.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Boreholes for explosives. 75.1315 Section 75... HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1315 Boreholes for explosives. (a) All explosives fired underground shall be confined in boreholes except— (1)...

  5. 30 CFR 75.1315 - Boreholes for explosives.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Boreholes for explosives. 75.1315 Section 75... HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1315 Boreholes for explosives. (a) All explosives fired underground shall be confined in boreholes except— (1)...

  6. 30 CFR 75.1315 - Boreholes for explosives.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Boreholes for explosives. 75.1315 Section 75... HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1315 Boreholes for explosives. (a) All explosives fired underground shall be confined in boreholes except— (1)...

  7. 30 CFR 75.1315 - Boreholes for explosives.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Boreholes for explosives. 75.1315 Section 75... HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1315 Boreholes for explosives. (a) All explosives fired underground shall be confined in boreholes except— (1)...

  8. 30 CFR 75.388 - Boreholes in advance of mining.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Boreholes in advance of mining. 75.388 Section 75.388 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR COAL MINE SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Ventilation § 75.388 Boreholes in advance of mining. (a) Boreholes shall be drilled...

  9. 30 CFR 75.388 - Boreholes in advance of mining.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Boreholes in advance of mining. 75.388 Section 75.388 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR COAL MINE SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Ventilation § 75.388 Boreholes in advance of mining. (a) Boreholes shall be drilled...

  10. 30 CFR 75.1315 - Boreholes for explosives.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Boreholes for explosives. 75.1315 Section 75... HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Explosives and Blasting § 75.1315 Boreholes for explosives. (a) All explosives fired underground shall be confined in boreholes except— (1)...