Sample records for heavy panel mounted

  1. Lunar Rover Solar Panel MountTeam Members: Tian Le, Tudor Boiangiu, Jeremy Chan, James Haensel To develop a mechanized mount for a solar panel to

    E-print Network

    Lunar Rover Solar Panel MountTeam Members: Tian Le, Tudor Boiangiu, Jeremy Chan, James Haensel To develop a mechanized mount for a solar panel to be mounted on a lunar rover. Must be: · capable of orienting panel towards sun · reside on mast extending vertically from rover · capable of unfurling solar

  2. Installation system for integral mounting of thermal or photovoltaic panels

    Microsoft Academic Search

    D. F. Rost; G. Ameduri; L. Groves

    1981-01-01

    A unique installation system for mounting solar thermal or photovoltaic solar collector panels as an integral part of a structure is described. The most common example would have the collector array replacing the sheathing and shingles of a roof supported by trusses or rafters on 24 inch centers. The design achieves the goals of a good integral installation which is

  3. Mount assembly for porous transition panel at annular combustor outlet

    NASA Technical Reports Server (NTRS)

    Sweeney, Ralph B. (Inventor); Verdouw, Albert J. (Inventor)

    1980-01-01

    A gas turbine engine combustor assembly of annular configuration has outer and inner walls made up of a plurality of axially extending multi-layered porous metal panels joined together at butt joints therebetween and each outer and inner wall including a transition panel of porous metal defining a combustor assembly outlet supported by a combustor mount assembly including a stiffener ring having a side undercut thereon fit over a transition panel end face; and wherein an annular weld joins the ring to the end face to transmit exhaust heat from the end face to the stiffener ring for dissipation from the combustor; a combustor pilot member is located in axially spaced, surrounding relationship to the end face and connector means support the stiffener ring in free floating relationship with the pilot member to compensate for both radial and axial thermal expansion of the transition panel; and said connector means includes a radial gap for maintaining a controlled flow of coolant from outside of the transition panel into cooling relationship with the stiffener ring and said weld to further cool the end face against excessive heat build-up therein during flow of hot gas exhaust through said outlet.

  4. Panel discussion on stopping of heavy ions

    NASA Astrophysics Data System (ADS)

    Baurichter, A.; Sigmund, P.; Sørensen, A. H.

    2002-10-01

    This is a condensed transscript of 90 minutes' discussion session marking the end of the International Symposium on Stopping of Heavy Ions (STOP01) held in Odense, Denmark, 5-8 August 2001. The time was divided up about equally between introductory and concluding remarks by the panel, and a general discussion involving most of the participants. The session was moderated by A.H. S ørensen. We have kept the contributions in the chronological order.

  5. 3D head mount display with single panel

    NASA Astrophysics Data System (ADS)

    Wang, Yuchang; Huang, Junejei

    2014-09-01

    The head mount display for entertainment usually requires light weight. But in the professional application has more requirements. The image quality, field of view (FOV), color gamut, response and life time are considered items, too. A head mount display based on 1-chip TI DMD spatial light modulator is proposed. The multiple light sources and splitting images relay system are the major design tasks. The relay system images the object (DMD) into two image planes to crate binocular vision. The 0.65 inch 1080P DMD is adopted. The relay has a good performance which includes the doublet to reduce the chromatic aberration. Some spaces are reserved for placing the mirror and adjustable mechanism. The mirror splits the rays to the left and right image plane. These planes correspond to the eyepieces objects and image to eyes. A changeable mechanism provides the variable interpupillary distance (IPD). The folding optical path makes sure that the HMD center of gravity is close to the head and prevents the uncomfortable downward force being applied to head or orbit. Two RGB LED assemblies illuminate to the DMD in different angle. The light is highly collimated. The divergence angle is small enough such that one LED ray would only enters to the correct eyepiece. This switching is electronic controlled. There is no moving part to produce vibration and fast switch would be possible. Two LED synchronize with 3D video sync by a driving board which also controls the DMD. When the left eye image is displayed on DMD, the LED for left optical path turns on. Vice versa for right image and 3D scene is accomplished.

  6. Test-Anchored Vibration Response Predictions for an Acoustically Energized Curved Orthogrid Panel with Mounted Components

    NASA Technical Reports Server (NTRS)

    Frady, Gregory P.; Duvall, Lowery D.; Fulcher, Clay W. G.; Laverde, Bruce T.; Hunt, Ronald A.

    2011-01-01

    A rich body of vibroacoustic test data was recently generated at Marshall Space Flight Center for a curved orthogrid panel typical of launch vehicle skin structures. Several test article configurations were produced by adding component equipment of differing weights to the flight-like vehicle panel. The test data were used to anchor computational predictions of a variety of spatially distributed responses including acceleration, strain and component interface force. Transfer functions relating the responses to the input pressure field were generated from finite element based modal solutions and test-derived damping estimates. A diffuse acoustic field model was employed to describe the assumed correlation of phased input sound pressures across the energized panel. This application demonstrates the ability to quickly and accurately predict a variety of responses to acoustically energized skin panels with mounted components. Favorable comparisons between the measured and predicted responses were established. The validated models were used to examine vibration response sensitivities to relevant modeling parameters such as pressure patch density, mesh density, weight of the mounted component and model form. Convergence metrics include spectral densities and cumulative root-mean squared (RMS) functions for acceleration, velocity, displacement, strain and interface force. Minimum frequencies for response convergence were established as well as recommendations for modeling techniques, particularly in the early stages of a component design when accurate structural vibration requirements are needed relatively quickly. The results were compared with long-established guidelines for modeling accuracy of component-loaded panels. A theoretical basis for the Response/Pressure Transfer Function (RPTF) approach provides insight into trends observed in the response predictions and confirmed in the test data. The software modules developed for the RPTF method can be easily adapted for quick replacement of the diffuse acoustic field with other pressure field models; for example a turbulent boundary layer (TBL) model suitable for vehicle ascent. Wind tunnel tests have been proposed to anchor the predictions and provide new insight into modeling approaches for this type of environment. Finally, component vibration environments for design were developed from the measured and predicted responses and compared with those derived from traditional techniques such as Barrett scaling methods for unloaded and component-loaded panels.

  7. Test-Anchored Vibration Response Predictions for an Acoustically Energized Curved Orthogrid Panel with Mounted Components

    NASA Technical Reports Server (NTRS)

    Frady, Gregory P.; Duvall, Lowery D.; Fulcher, Clay W. G.; Laverde, Bruce T.; Hunt, Ronald A.

    2011-01-01

    rich body of vibroacoustic test data was recently generated at Marshall Space Flight Center for component-loaded curved orthogrid panels typical of launch vehicle skin structures. The test data were used to anchor computational predictions of a variety of spatially distributed responses including acceleration, strain and component interface force. Transfer functions relating the responses to the input pressure field were generated from finite element based modal solutions and test-derived damping estimates. A diffuse acoustic field model was applied to correlate the measured input sound pressures across the energized panel. This application quantifies the ability to quickly and accurately predict a variety of responses to acoustically energized skin panels with mounted components. Favorable comparisons between the measured and predicted responses were established. The validated models were used to examine vibration response sensitivities to relevant modeling parameters such as pressure patch density, mesh density, weight of the mounted component and model form. Convergence metrics include spectral densities and cumulative root-mean squared (RMS) functions for acceleration, velocity, displacement, strain and interface force. Minimum frequencies for response convergence were established as well as recommendations for modeling techniques, particularly in the early stages of a component design when accurate structural vibration requirements are needed relatively quickly. The results were compared with long-established guidelines for modeling accuracy of component-loaded panels. A theoretical basis for the Response/Pressure Transfer Function (RPTF) approach provides insight into trends observed in the response predictions and confirmed in the test data. The software developed for the RPTF method allows easy replacement of the diffuse acoustic field with other pressure fields such as a turbulent boundary layer (TBL) model suitable for vehicle ascent. Structural responses using a TBL model were demonstrated, and wind tunnel tests have been proposed to anchor the predictions and provide new insight into modeling approaches for this environment. Finally, design load factors were developed from the measured and predicted responses and compared with those derived from traditional techniques such as historical Mass Acceleration Curves and Barrett scaling methods for acreage and component-loaded panels.

  8. An evaluation of thermal comfort and energy consumption for a surface-mounted ceiling radiant panel heating system

    SciTech Connect

    Yost, P.A.; Barbour, C.E. [NAHB Research Center, Inc., Upper Marlboro, MD (United States); Watson, R.

    1995-08-01

    A review of literature revealed little relevant empirical evidence for energy savings and thermal comfort associated with ceiling, surface-mounted radiant heating systems. Empirical studies used to discuss the energy and thermal comfort performance of radiant heating systems made little or no distinction among the various types of radiant heating systems. Since ceiling, surface-mounted radiant panels-in contrast to other radiant systems-are fast-acting and deliver a much higher proportion of their output as radiant heat, they can have a substantial impact on both energy and thermal comfort performance. Testing the energy and thermal comfort performance in an occupied home could serve to expand the base of information on which discussions of various heating strategies are based. A surface-mounted, ceiling radiant heating system, an air-to-air heat pump system, and a monitoring data-acquisition system were installed in an occupied research home. Information on thermal comfort and energy consumption for alternating operation of the two heating systems was collected for approximately half of a heating season. This allowed a comparison of the radiant system and the more conventional air-to-air heat pump system. Also, data on energy consumption from a zoned electric baseboard heating system previously installed in the same house were available for comparison. Fast-acting radiant heating systems that can recover quickly from setback and target the delivery of heat to objects and occupants have a significantly reduced installed capacity in comparison to more conventional heating systems. In this study, for the same outdoor design conditions, the installed capacity of the radiant system was 2.5 times less than the electric baseboard system and two times less than that of the heat pump system.

  9. Analytical results and sample locality map of stream-sediment, heavy-mineral-concentrate, and rock samples from the Little Rockies, Mount Pennell, and Mount Hillers Wilderness Study Areas (UT-050-247,248,249), Garfield County, Utah

    SciTech Connect

    Detra, D.E.; Erickson, M.S.; Kemp, W.M. III; Willson, W.R.

    1984-01-01

    This report presents the results of a geochemical and mineralogical survey of the Little Rockies, Mount Pennell, and Mount Hillers Wilderness Study Areas (UT-050-247,248,249), Garfield County, Utah. The Little Rockies, Mount Pennell, and Mount Hillers Wilderness Study Areas comprise about 350 mi/sup 2/ (910 km/sup 2/) in Garfield County, Utah. The study areas occupy the southern portion of the Henry Mountains and includes Mount Pennell, Mount Hillers, and Mount Ellsworth. The areas consist of a series of diorite porphyry laccoliths and their satellite bodies, all of Eocene age, which intrude the 8000 ft (2500 m) thick Henry Basin sediments which range in age from Permian to Holocene. Only Triassic and younger rocks are exposed in the areas. Samples were collected at 153 sites. At nearly all of those sites, both a stream-sediment sample and a heavy-mineral-concentrate sample were collected. Where suitable outcrop was available, rock samples were collected. In addition to the spectrographic analysis all heavy-mineral-concentrate samples were mineralogically analyzed. Minerals reported include zircon (round and euhedral), sphene, rutile, anatase, barite, apatite, scheelite, epidote, pyrite, pyroxene, arsenopyrite, amphibole, and rock fragments.

  10. A hybrid simulated method for analyzing the optical efficiency of a head-mounted display with a quasi-crystal OLED panel.

    PubMed

    Chang, Kao-Der; Li, Chang-Yi; Pan, Jui-Wen; Cheng, Kuei-Yuan

    2014-03-10

    Organic light emitting diodes (OLEDs) with a quasi-crystal (QC) structure are analyzed and applied in a head-mounted display (HMD) system in this study. We adopt a hybrid simulated method to evaluate the light extraction efficiency (LEE) and far-field pattern in the air, and study the relationship between them. The simulation results show that OLEDs implanted with the QC structure can provide a collimated far-field pattern to increase the brightness. Using this 10-fold QC arrangement the maxima LEE of the OLEDs can be increased by 1.20 times. Compared with conventional OLEDs, the viewing angle of the OLED panel decreases from 120 degrees to 26 degrees with an improvement in the optical efficiency of the HMD system by 2.66 times. Moreover, the normalized on-axis intensity in the pupil of the eyepiece can be enlarged up to 3.95 times which suggests that the OLED panel can save 74.68% energy while achieving the same on-axis intensity as conventional OLEDs. PMID:24922267

  11. Harvesting energy from the sun---photovoltaic panel apparatus

    NASA Astrophysics Data System (ADS)

    Riccio, David; Schier, Walter

    2011-04-01

    Two 11 cm x 18 cm photovoltaic panels are mounted on a modified ballistic pendulum apparatus that was retired from service in our labs. Its heavy base with pivoted arm provides a stable mount with angle adjustment. Residential PV panel installations group the panels both in series and in parallel, extract maximum power from these groupings, and deal with varying intensity due to changing light conditions. Measurements in the undergraduate lab with a bare light bulb simultaneously provide characteristic graphs of current vs voltage, power vs voltage, load resistance vs voltage for PV panels singly, in series, or in parallel. Also intensity dependence on angle and on distance to the light source are studied in the lab. A custom junction box with a variable load resistor connects the PV panels to PASCO's interface box with voltage and current leads. PASCO's Data Studio is used to record and analyze the graphs.

  12. Modular structurally integrated solar panel

    Microsoft Academic Search

    Stout

    1981-01-01

    An improved solar panel system is provided which is constructed for mounting of solar collector panel modules between conventionally spaced and sloped roof rafters. The solar panel modules include integral gutter portions and integral flashing portions. The solar panel system also includes a system of top and side flashings which complement the integral flashings of the solar panel modules so

  13. Human health and ecological toxicity potentials due to heavy metal content in waste electronic devices with flat panel displays.

    PubMed

    Lim, Seong-Rin; Schoenung, Julie M

    2010-05-15

    Display devices such as cathode-ray tube (CRT) televisions and computer monitors are known to contain toxic substances and have consequently been banned from disposal in landfills in the State of California and elsewhere. New types of flat panel display (FPD) devices, millions of which are now purchased each year, also contain toxic substances, but have not previously been systematically studied and compared to assess the potential impact that could result from their ultimate disposal. In the current work, the focus is on the evaluation of end-of-life toxicity potential from the heavy metal content in select FPD devices with the intent to inform material selection and design-for-environment (DfE) decisions. Specifically, the metals antimony, arsenic, barium, beryllium, cadmium, chromium, cobalt, copper, lead, mercury, molybdenum, nickel, selenium, silver, vanadium, and zinc in plasma TVs, LCD (liquid crystal display) TVs, LCD computer monitors and laptop computers are considered. The human health and ecotoxicity potentials are evaluated through a life cycle assessment perspective by combining data on the respective heavy metal contents, the characterization factors in the U.S. EPA Tool for the Reduction and Assessment of Chemical and other environmental Impacts (TRACI), and a pathway and impact model. Principal contributors to the toxicity potentials are lead, arsenic, copper, and mercury. Although the heavy metal content in newer flat panel display devices creates less human health toxicity potential than that in CRTs, for ecological toxicity, the new devices are worse, especially because of the mercury in LCD TVs and the copper in plasma TVs. PMID:20056318

  14. Mounts For Selective Rotation And Translation

    NASA Technical Reports Server (NTRS)

    Collins, Earl R., Jr.

    1989-01-01

    Blade-in-groove bearings stacked to obtain necessary degrees of freedom. Mounting system allows panels to be tilted, rotated, and translated selectively. Developed for large solar reflectors or antennas composed of hexagonal panels about 6 ft. wide and 6 in. thick. With system, each panel tilted around two axes to focus antenna. At same time, each panel translates along these axes to accommodate thermal expansion and contraction without affecting focus.

  15. A large-scale mutant panel in wheat developed using heavy-ion beam mutagenesis and its application to genetic research

    NASA Astrophysics Data System (ADS)

    Murai, Koji; Nishiura, Aiko; Kazama, Yusuke; Abe, Tomoko

    2013-11-01

    Mutation analysis is a powerful tool for studying gene function. Heavy-ion beam mutagenesis is a comparatively new approach to inducing mutations in plants and is particularly efficient because of its high linear energy transfer (LET). High LET radiation induces a higher rate of DNA double-strand breaks than other mutagenic methods. Over the last 12 years, we have constructed a large-scale mutant panel in diploid einkorn wheat (Triticum monococcum) using heavy-ion beam mutagenesis. Einkorn wheat seeds were exposed to a heavy-ion beam and then sown in the field. Selfed seeds from each spike of M1 plants were used to generate M2 lines. Every year, we obtained approximately 1000 M2 lines and eventually developed a mutant panel with 10,000 M2 lines in total. This mutant panel is being systematically screened for mutations affecting reproductive growth, and especially for flowering-time mutants. To date, we have identified several flowering-time mutants of great interest: non-flowering mutants (mvp: maintained vegetative phase), late-flowering mutants, and early-flowering mutants. These novel mutations will be of value for investigations of the genetic mechanism of flowering in wheat.

  16. Conical diffused-sunlight solar panel

    Microsoft Academic Search

    Clegg

    1986-01-01

    A conical diffused-sunlight solar panel is described comprising in general an annular lens mounted below roof windows in the peripheral area of a circular roof of a circular building, a circular conical beam concentrator mounted below the roof in the center of the building, a glass heat duct mounted inside the beam concentrator, and a metal heat duct mounted inside

  17. Mirror mount

    DOEpatents

    Kuklo, Thomas C. (Oakdale, CA); Bender, Donald A. (Dublin, CA)

    1994-01-01

    A unique lens or mirror mount having adjustable constraints at two key locations to allow for "X" and "Y" tilts of the mirror only. The device uses two pair of flexures of a type such that the pivots of the mirror gimble are rigidly fixed in all planes allowing the device to have zero stacking tolerance and zero wear over time.

  18. Mirror mount

    DOEpatents

    Kuklo, T.C.; Bender, D.A.

    1994-10-04

    A unique lens or mirror mount having adjustable constraints at two key locations to allow for ''X'' and ''Y'' tilts of the mirror only is disclosed. The device uses two pair of flexures of a type such that the pivots of the mirror gimble are rigidly fixed in all planes allowing the device to have zero stacking tolerance and zero wear over time. 4 figs.

  19. Mounting structure

    NASA Technical Reports Server (NTRS)

    Ganssle, Eugene Robert (Inventor); Scott, Ralph Richard (Inventor); Williams, Richard Jean (Inventor)

    1978-01-01

    A mounting platform for heat producing instruments operated in a narrow equilibrium temperature range comprises a grid-like structure with relatively large openings therein. The instruments are secured to and thermally coupled with the grid surface facing the instruments. Excess heat from the instruments is selectively radiated to the ambient through openings in the grid, the grid surfaces at these openings exhibiting low thermal emissivity and adsorptivity. The remainder of the grid is maintained at the equilibrium temperature and is covered with a thermal insulating blanket. Thus, the entire system including the platform and instruments is maintained substantially isothermal, whereby the instruments remain in fixed physical relationship to one another.

  20. Mount Vernon

    NSDL National Science Digital Library

    Owned and operated by the Mount Vernon Ladies' Association since 1858, the home and grounds at Mount Vernon were home to George Washington for over 45 years. While the site contains ample information for those planning to visit the home in person, there are several nice online features here for persons who cannot make the trip. The Mansion Tour is one such feature, as it allows visitors to the site to take a virtual tour of the home's three floors. Navigating through the floors, visitors can click on such rooms as the Master Bedroom (where Washington himself died in 1799) and read a brief discussion of the room's use and importance, along with viewing additional objects that were part of the room's decor, such as portraits and a mantel clock. The Educational Resources section of the site contains a biographical portrait of Washington, along with an online quiz. Information on the various archaeological digs on the site is available, as is a frequently asked questions section, which dispels various popular myths about the late president, such as the belief that he wore wooden teeth or that he chopped down a cherry tree.

  1. Graphite Composite Panel Polishing Fixture

    NASA Technical Reports Server (NTRS)

    Hagopian, John; Strojny, Carl; Budinoff, Jason

    2011-01-01

    The use of high-strength, lightweight composites for the fixture is the novel feature of this innovation. The main advantage is the light weight and high stiffness-to-mass ratio relative to aluminum. Meter-class optics require support during the grinding/polishing process with large tools. The use of aluminum as a polishing fixture is standard, with pitch providing a compliant layer to allow support without deformation. Unfortunately, with meter-scale optics, a meter-scale fixture weighs over 120 lb (.55 kg) and may distort the optics being fabricated by loading the mirror and/or tool used in fabrication. The use of composite structures that are lightweight yet stiff allows standard techniques to be used while providing for a decrease in fixture weight by almost 70 percent. Mounts classically used to support large mirrors during fabrication are especially heavy and difficult to handle. The mount must be especially stiff to avoid deformation during the optical fabrication process, where a very large and heavy lap often can distort the mount and optic being fabricated. If the optic is placed on top of the lapping tool, the weight of the optic and the fixture can distort the lap. Fixtures to support the mirror during fabrication are often very large plates of aluminum, often 2 in. (.5 cm) or more in thickness and weight upwards of 150 lb (68 kg). With the addition of a backing material such as pitch and the mirror itself, the assembly can often weigh over 250 lb (.113 kg) for a meter-class optic. This innovation is the use of a lightweight graphite panel with an aluminum honeycomb core for use as the polishing fixture. These materials have been used in the aerospace industry as structural members due to their light weight and high stiffness. The grinding polishing fixture consists of the graphite composite panel, fittings, and fixtures to allow interface to the polishing machine, and introduction of pitch buttons to support the optic under fabrication. In its operation, the grinding polishing fixture acts as a reaction structure to the polishing tool. It must be stiff enough to avoid imparting a distorted shape to the optic under fabrication and light enough to avoid self-deflection. The fixture must also withstand significant tangential loads from the polishing machine during operations.

  2. Ultrasonic scanner for radial and flat panels

    NASA Technical Reports Server (NTRS)

    Spencer, R. L.; Hill, E. K. (inventors)

    1973-01-01

    An ultrasonic scanning mechanism is described that scans panels of honeycomb construction or with welded seams. It incorporates a device which by simple adjustment is adapted to scan either a flat panel or a radial panel. The supporting structure takes the form of a pair of spaced rails. An immersion tank is positioned between the rails and below their level. A work holder is mounted in the tank and is adapted to hold the flat or radial panel. A traveling bridge is movable along the rails and a carriage is mounted on the bridge.

  3. Vibration isolating engine mount

    NASA Astrophysics Data System (ADS)

    Bender, Stanley I.; Dawes, Peter W.; Butler, Lawrence

    1993-07-01

    An improved engine suspension system is provided for attenuating vibration in a gas turbine engine. In one embodiment, the invention is directed to an aircraft engine suspension system for mounting a gas turbine engine to a supporting frame by mounts arranged in first and second parallel, spaced axial mounting planes of the engine. First and second vibration isolation mounts are aligned in the first mounting plane and couple the engine to the supporting frame. Each of the first and second mounts provides both radial and axial vibration damping to the engine as well as radial and axial stiffness. A third vibration isolation mount is aligned in the second mounting plane and couples the engine and support frame together to provide radial and tangential vibration damping to the engine as well as radial and tangential stiffness. The mounts are arranged axially and radially such that the suspension system is statically and dynamically determinate.

  4. PV module mounting method and mounting assembly

    SciTech Connect

    Lenox, Carl J.S.; Johnson, Kurt M.

    2013-04-23

    A method for mounting PV modules to a deck includes selecting PV module layout pattern so that adjacent PV module edges are spaced apart. PV mounting and support assemblies are secured to the deck according to the layout pattern using fasteners extending into the deck. The PV modules are placed on the PV mounting and support assemblies. Retaining elements are located over and secured against the upper peripheral edge surfaces of the PV modules so to secure them to the deck with the peripheral edges of the PV modules spaced apart from the deck. In some examples a PV module mounting assembly, for use on a shingled deck, comprises flashing, a base mountable on the flashing, a deck-penetrating fastener engageable with the base and securable to the deck so to secure the flashing and the base to the shingled deck, and PV module mounting hardware securable to the base.

  5. High bandwidth optical mount

    DOEpatents

    Bender, Donald A. (Dublin, CA); Kuklo, Thomas (Oakdale, CA)

    1994-01-01

    An optical mount, which directs a laser beam to a point by controlling the position of a light-transmitting optic, is stiffened so that a lowest resonant frequency of the mount is approximately one kilohertz. The optical mount, which is cylindrically-shaped, positions the optic by individually moving a plurality of carriages which are positioned longitudinally within a sidewall of the mount. The optical mount is stiffened by allowing each carriage, which is attached to the optic, to move only in a direction which is substantially parallel to a center axis of the optic. The carriage is limited to an axial movement by flexures or linear bearings which connect the carriage to the mount. The carriage is moved by a piezoelectric transducer. By limiting the carriage to axial movement, the optic can be kinematically clamped to a carriage.

  6. High bandwidth optical mount

    DOEpatents

    Bender, D.A.; Kuklo, T.

    1994-11-08

    An optical mount, which directs a laser beam to a point by controlling the position of a light-transmitting optic, is stiffened so that a lowest resonant frequency of the mount is approximately one kilohertz. The optical mount, which is cylindrically-shaped, positions the optic by individually moving a plurality of carriages which are positioned longitudinally within a sidewall of the mount. The optical mount is stiffened by allowing each carriage, which is attached to the optic, to move only in a direction which is substantially parallel to a center axis of the optic. The carriage is limited to an axial movement by flexures or linear bearings which connect the carriage to the mount. The carriage is moved by a piezoelectric transducer. By limiting the carriage to axial movement, the optic can be kinematically clamped to a carriage. 5 figs.

  7. Spherical mirror mount

    NASA Technical Reports Server (NTRS)

    Meyer, Jay L. (Inventor); Messick, Glenn C. (Inventor); Nardell, Carl A. (Inventor); Hendlin, Martin J. (Inventor)

    2011-01-01

    A spherical mounting assembly for mounting an optical element allows for rotational motion of an optical surface of the optical element only. In that regard, an optical surface of the optical element does not translate in any of the three perpendicular translational axes. More importantly, the assembly provides adjustment that may be independently controlled for each of the three mutually perpendicular rotational axes.

  8. Panel flutter

    NASA Technical Reports Server (NTRS)

    Dowell, E. H.

    1972-01-01

    Criteria are presented for the prediction of panel flutter, determination of its occurrence, design for its prevention, and evaluation of its severity. Theoretical analyses recommended for the prediction of flutter stability boundaries, vibration amplitudes, and frequencies for several types of panels are described. Vibration tests and wind tunnel tests are recommended for certain panels and environmental flow conditions to provide information for design of verification analysis. Appropriate design margins on flutter stability boundaries are given and general criteria are presented for evaluating the severity of possible short-duration, limited-amplitude panel flutter on nonreusable vehicles.

  9. Operation and maintenance cost data for residential photovoltaic modules/panels

    NASA Technical Reports Server (NTRS)

    Oster, J. R., Jr.; Zaremski, D. R., Jr.; Albert, E. M.; Hawkins, S. L.

    1980-01-01

    Costs associated with the operation and maintenance of residential photovoltaic modules and arrays are studied. Six basic topics related to operation and maintenance to photovoltaic arrays are investigated: maintenance; cleaning; panel replacement; gasket repair/replacement; wiring repair/replacement; and termination repair/replacement. The effects of the mounting types (rack mount, stand off mount, direct mount and integral mount) and the installation/replacement type (sequential, partial interruption and independent) are identified and described. Methods of reducing maintenance costs are suggested.

  10. Laboratory calibration of field reflectance panels

    NASA Technical Reports Server (NTRS)

    Biggar, S. F.; Labed, J.; Santer, R. P.; Slater, P. N.; Jackson, R. D.

    1988-01-01

    A method used for calibrating field reflectance panels in the visible and shortwave infrared wavelength range is described. The directional reflectance factor of painted barium sulfate (BaSO4) panels is determined. The reference for this method is the hemispherical reflectance of pressed polytetrafluoroethylene (halon) powder prepared according to National Bureau of Standards (NBS) directions. The panels and a radiometer are mounted on rotation stages to measure the reflectance factor at different incidence and view angles. The sensor can be any laboratory or field filter radiometer small enough to mount on the apparatus. The method is used to measure the reflectance factors of halon and BaSO4 panels between 0.45 and 0.85 micrometers. These reflectance factors are compared to those measured by a field apparatus. The results agree to within 0.013 in reflectance at incidence angles between 15 and 75 degrees.

  11. Mount St. Helens, Washington

    NSDL National Science Digital Library

    This resource about Mount St. Helens, a stratovolcano in the Cascade Range best known for its violent eruption in 1980, features links to all aspects of the volcano, including real time, online video cam and current seismicity, its geographic setting, and geologic and eruptive history. Students learn of an eruption in 1800 as well as extensive details of the 1980 event. Links labeled 'Special Items of Interest' include information about volcanic highlights and features, points of interest, and Lewis and Clark information, which includes the sighting of Mount St. Helens. Other links lead to maps, graphics, images, publications, reports, and other items of interest involving this volcano and others.

  12. Apollo Telescope Mount Illustration

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The Apollo Telescope Mount (ATM) served as the first marned astronomical observatory in space. It was designed for solar research from Earth orbit aboard the Skylab. This image is a cutaway illustration of the ATM canister with callouts and characteristics. The ATM was designed and developed by the Marshall Space Flight Center.

  13. Apollo Telescope Mount Illustration

    NASA Technical Reports Server (NTRS)

    1971-01-01

    The Apollo Telescope Mount (ATM) served as the first marned astronomical observatory in space. It was designed for solar research from Earth orbit aboard the Skylab. This image is a cutaway illustration of the ATM canister. The ATM was designed and developed by the Marshall Space Flight Center.

  14. Apollo Telescope Mount Illustration

    NASA Technical Reports Server (NTRS)

    1971-01-01

    The Apollo Telescope Mount (ATM) served as the first marned astronomical observatory in space. It was designed for solar research from Earth orbit aboard the Skylab. This image is a cutaway illustration of the ATM canister with callouts. The ATM was designed and developed by the Marshall Space Flight Center.

  15. Mount Wilson - America's observatory

    NASA Astrophysics Data System (ADS)

    Jastrow, Robert; Baliunas, Sallie

    1993-03-01

    New developments at the Mount Wilson Observatory are reviewed. The renovation of the 100-inch Hooker reflector is described, and projects involving interferometry and adaptive optics are examined. Major new programs in support of science education and amateur astronomy are discussed.

  16. Mount St. Helens

    NSDL National Science Digital Library

    Mount St. Helens, the most active volcano in the Cascade Range, caught the public's attention when massive eruptions began in 1980. With new eruptions and earthquakes taking place recently, people are being reminded of the grave dangers associated with this volcano. The first website, provided by the USDA Forest Service, presents the research, recreational, and educational activities at the 110,000-acre National Volcanic Monument, created in 1982 (1). Users can find live pictures and videos of Mount St. Helens and read about the latest volcanic activity. Second, the University of North Dakota supplies great retrospective of the 1980 explosion (2). Through a series of incredible pictures, students can discover how a huge eruption can drastically change the surrounding landscape. Users can take a virtual trip up the volcano from the trailhead to the summit. At the next website, the USGS provides links to current seismicity and real-time eruption and hydrologic monitoring data (3). Educators can find numerous pictures and figures illustrating the physical features of a volcano. Next, the Pacific Northwest Seismograph Network supplies seismographic and volcanic data for Mount St. Helens (4). While Mount St. Helens is considered the most active volcano in the Pacific Northwest at the moment, visitors can also discover the potential for earthquakes and significant volcanic activity at other locations in the Pacific Northwest. At the fifth website, the Wheeling Jesuit University offers a historical narrative of the serenity of the volcano and its periodic rages (5). While this site does not provide in-depth materials and data like the other sites, the straightforward writing style may be more beneficial to younger audiences. The sixth website is a news release from NASA describing the possibility that infrared digital images could "provide valuable clues as to how" Mount St. Helens erupted on October 1, 2004 (6). Through the many enlightening images of the lava dome, users can learn about how digital infrared imagery's master bands and associated wavelengths are used to characterize different features of the volcano. Next, in a press release, the National Geographic describes the Mount St. Helens eruption this month (7). Students and educators can discover how earthquakes are caused as rainwater encounters hot rock in the fall and how this process may impact the activity of volcanoes. The web site also introduces individuals to the Ring of Fire. Lastly, MSNBC offers a news article and video on the molten magma rising in Mount St. Helens, the current activity levels, and the advisories (8). The web site features a link describing the newest sensors that may assist scientists in predicting explosions.

  17. Panel Sessions.

    ERIC Educational Resources Information Center

    Proceedings of the ASIS Mid-Year Meeting, 1992

    1992-01-01

    Lists the speakers and summarizes the issues addressed for 12 panel sessions on topics related to networking, including libraries and national networks, federal national resources and energy programs, multimedia issues, telecommuting, remote image serving, accessing the Internet, library automation, scientific information, applications of Z39.50,…

  18. Mount St. Helens Rebirth

    NASA Technical Reports Server (NTRS)

    2002-01-01

    The catastrophic eruption of Mt. St. Helens 20 years ago today (on May 18, 1980), ranks among the most important natural events of the twentieth century in the United States. Because Mt. St. Helens is in a remote area of the Cascades Mountains, only a few people were killed by the eruption, but property damage and destruction totaled in the billions of dollars. Mount St. Helens is an example of a composite or stratovolcano. These are explosive volcanoes that are generally steep-sided, symmetrical cones built up by the accumulation of debris from previous eruptions and consist of alternating layers of lava flows, volcanic ash and cinder. Some of the most photographed mountains in the world are stratovolcanoes, including Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mount Hood in Oregon, and Mount Rainier in Washington. The recently erupting Mount Usu on the island of Hokkaido in Japan is also a stratovolcano. Stratovolcanoes are characterized by having plumbing systems that move magma from a chamber deep within the Earth's crust to vents at the surface. The height of Mt. St. Helens was reduced from about 2950 m (9677 ft) to about 2550 m (8364 ft) as a result of the explosive eruption on the morning of May 18. The eruption sent a column of dust and ash upwards more than 25 km into the atmosphere, and shock waves from the blast knocked down almost every tree within 10 km of the central crater. Massive avalanches and mudflows, generated by the near-instantaneous melting of deep snowpacks on the flanks of the mountain, devastated an area more than 20 km to the north and east of the former summit, and rivers choked with all sorts of debris were flooded more than 100 km away. The area of almost total destruction was about 600 sq. km. Ash from the eruption cloud was rapidly blown to the northeast and east producing lightning which started many small forest fires. An erie darkness caused by the cloud enveloped the landscape more than 200 km from the blast area, and ash could be seen falling from the sky over the Great Plains, more than 1500 km distant. This image was acquired by Landsat 7 on Aug. 22, 1999. It was produced at 30-m resolution using bands 3, 2, and 1 to display red, green, and blue, respectively ('true color'). Some of the effects of the massive eruption on May 18, 1980, can still be seen clearly, especially on the northern and eastern flanks of Mount St. Helens, which are still mostly barren (shades of white and gray). The crater is in the center of the image. Note the streaking from the crater (gray on the image). These are the remnants of pyroclastic flows (superheated avalanches of gas, ash and pieces of rock) that carved deep channels down the slopes and onto the relatively flat areas near the base of the mountain. The partially-filled Spirit Lake can be seen just to the northeast of the crater (blue-black on the image), and the where most of the energy was directed during the blast is the gray area immediately to the northwest of the crater. However, on other parts of the mountain, the rejuvenation process is obvious. Ash deposits have supplied minerals which have accelerated vegetation growth (various shades of green). Though far from what it looked like 20 years ago, Mount St Helens is actively recovering. Data courtesy Landsat 7 project and EROS Data Center. Caption by James Foster, NASA Goddard Space Flight Center.

  19. Plasma Screen Floating Mount

    DOEpatents

    Eakle, Robert F. (New Ellenton, SC); Pak, Donald J. (Martine, GA)

    2004-10-26

    A mounting system for a flat display screen, particularly a plasma display screen, suspends the screen separately in each of the x-, y- and z-directions. A series of frames located by linear bearings and isolated by springs and dampers allows separate controlled movement in each axis. The system enables the use of relatively larger display screens in vehicles in which plasma screen are subject to damage from vibration.

  20. Active control of sound transmission through a stiffened panel using a hybrid control strategy

    Microsoft Academic Search

    Ming Yuan; Hongli Ji; Jinhao Qiu; Tianbing Ma

    2012-01-01

    This article presents active control laws for sound transmission through a stiffened panel in the low-frequency range. A stiffened panel mounted on a metallic box is used to simulate aircraft fuselage and cabin system. A loudspeaker located outside the box is driven by band-limited white noise to exert acoustic excitation. Dynamic properties of the stiffened panel are characterized through a

  1. Architectural Panels

    NASA Astrophysics Data System (ADS)

    1985-01-01

    Alliance Wall Corporation's Whyteboard, a porcelain enamel on steel panels wall board, owes its color stability to a KIAC engineering background study to identify potential technologies and manufacturers of equipment which could be used to detect surface flaws. One result of the data base search was the purchase of a spectrocolorimeter which enables the company to control some 250 standard colors, and match special colors.

  2. Roofing panels

    Microsoft Academic Search

    Brill-edwards

    1983-01-01

    A roofing panel of glass-reinforced plastic (G.R.P.) or sheet metal is stiffened by longitudinal beams on its underside to span one pitch of a pitched roof from eaves to ridge. It has an outer skin and an inner impervious liner spaced therefrom and supported on the stiffening beams so as to form a tunnel open at both ends and extending

  3. Manipulator mounted transfer platform

    SciTech Connect

    Dobbins, J.C.; Hoover, M.A.; May, K.W.; Ross, M.J.

    1990-01-23

    The patent describes in a manipulator system for use in hazardous environments including a manipulator adapted for reciprocal movement upon a guide device, a transfer platform. It comprises: a bed frame defining a generally horizontal bed projecting outwardly from the manipulator; and frame mounting means securing the bed frame to the manipulator in a generally cantilevered fashion, thereby essentially minimizing the structure necessary to support the platform outwardly of the manipulator while enhancing operator visibility of the platform and the manipulator during use of the manipulator system.

  4. Plasma Panel Based Radiation Detectors

    SciTech Connect

    Friedman, Dr. Peter S. [Integrated Sensors, LLC; Varner Jr, Robert L [ORNL; Ball, Robert [University of Michigan; Beene, James R [ORNL; Ben Moshe, M. [Tel Aviv University; Benhammou, Yan [Tel Aviv University; Chapman, J. Wehrley [University of Michigan; Etzion, E [Tel Aviv University; Ferretti, Claudio [University of Michigan; Bentefour, E [Ion Beam Applications; Levin, Daniel S. [University of Michigan; Moshe, M. [Tel Aviv University; Silver, Yiftah [Tel Aviv University; Weaverdyck, Curtis [University of Michigan; Zhou, Bing [University of Michigan

    2013-01-01

    The plasma panel sensor (PPS) is a gaseous micropattern radiation detector under current development. It has many operational and fabrication principles common to plasma display panels (PDPs). It comprises a dense matrix of small, gas plasma discharge cells within a hermetically sealed panel. As in PDPs, it uses non-reactive, intrinsically radiation-hard materials such as glass substrates, refractory metal electrodes, and mostly inert gas mixtures. We are developing these devices primarily as thin, low-mass detectors with gas gaps from a few hundred microns to a few millimeters. The PPS is a high gain, inherently digital device with the potential for fast response times, fine position resolution (< 50 m RMS) and low cost. In this paper we report here on prototype PPS experimental results in detecting betas, protons and cosmic muons, and we extrapolate on the PPS potential for applications including detection of alphas, heavy-ions at low to medium energy, thermal neutrons and X-rays.

  5. Hymenaea courbaril Marine construction, heavy construction,

    E-print Network

    FSC Jatoba Hymenaea courbaril Marine construction, heavy construction, light construction, interior construction, furniture FSC Pine Pinus spp. Marine construction, heavy construction, light construction, interior construction, panel products, furniture FSC Larch Larix spp. (European Larch, Larix decidua

  6. Mount St. Helens

    NSDL National Science Digital Library

    The Mount St. Helens Web page was built by a student in Vancouver, Washington and offers images, stories, and curriculum related to the eruption of the volcano in 1980. Over 1,500 images are available allowing tours of the volcano before, during, and after the eruption. Learn about the people, animals, and plants affected by the blast, and find out how the earth heals itself from an event of this magnitude. The Living Laboratory Curriculum section takes advantage of a unique opportunity to relate a presently-observable volcanic phenomenon to study plant succession, animal behavior, evolutionary and geologic processes, ecology, weather patterns and environmental issues. Links to other volcano-related sites include NASA's Volcano World.

  7. Mount Baker, Washington

    NSDL National Science Digital Library

    This site contains information about Mt. Baker, a volcano in the Cascade Range. The site features links to all aspects of the volcano, including its geographic setting, and geologic and eruptive history. Named for third lieutenant Joseph Baker of the Vancouver exploration, Mt. Baker sits atop a similar older volcanic cone called Black Buttes volcano, which was active between 500,000 and 300,000 years ago. Historical activity at Mount Baker includes several explosions during the mid-19th century, which were witnessed from the Bellingham area, and since the late 1950s, numerous small-volume debris avalanches. Links labeled 'Special Items of Interest' include information about volcanic highlights and features, and points of interest. Other links lead to maps, graphics, images, publications, reports, and other items of interest involving this volcano and others.

  8. Mount Usu Erupts

    NSDL National Science Digital Library

    de Nie, Michael Willem.

    The snow-covered peak of the 2,402-foot (732-meter) Mount Usu erupted today, spewing black smoke and ash and forcing over 15,000 people from their homes. Historically one of Japan's most active volcanoes, Usu last erupted in 1978 after a number of earthquakes which formed a new and smaller volcano by its side. Mudslides triggered by that eruption killed three people in 1978, but so far no casualties have been reported from this eruption, which was predicted by experts. While volcanologists doubt that another major explosion will occur, they have not ruled out further activity. Another concern is mudslides, as the hot ash and smoke could quickly melt the mountain's thick carpet of snow.

  9. Task Panel Sensing with a Movable Camera

    NASA Astrophysics Data System (ADS)

    Wolfe, William J.; Mathis, Donald W.; Magee, Michael; Hoff, William A.

    1990-03-01

    This paper discusses the integration of model based computer vision with a robot planning system. The vision system deals with structured objects with several movable parts (the "Task Panel"). The robot planning system controls a T3-746 manipulator that has a gripper and a wrist mounted camera. There are two control functions: move the gripper into position for manipulating the panel fixtures (doors, latches, etc.), and move the camera into positions preferred by the vision system. This paper emphasizes the issues related to repositioning the camera for improved viewpoints.

  10. Mount St. Helens Flyover

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image of Mt. St. Helens volcano in Washington State was acquired on August 8, 2000 and covers an area of 37 by 51 km. Mount Saint Helens, a volcano in the Cascade Range of southwestern Washington that had been dormant since 1857, began to show signs of renewed activity in early 1980. On 18 May 1980, it erupted with such violence that the top of the mountain was blown off, spewing a cloud of ash and gases that rose to an altitude of 19 kilometers. The blast killed about 60 people and destroyed all life in an area of some 180 square kilometers (some 70 square miles), while a much larger area was covered with ash and debris. It continues to spit forth ash and steam intermittently. As a result of the eruption, the mountain's elevation decreased from 2,950 meters to 2,549 meters. The simulated fly-over was produced by draping ASTER visible and near infrared image data over a digital topography model, created from ASTER's 3-D stereo bands. The color was computer enhanced to create a 'natural' color image, where the vegetation appears green. The topography has been exaggerated 2 times to enhance the appearance of the relief. Landsat7 aquired an image of Mt. St. Helens on August 22, 1999. Image and animation courtesy NASA/GSFC/MITI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team.

  11. Spartan Auxiliary Mount Panel (SPAM): A Metal Matrix Composite Honeycomb Panel for Space Flight Use

    NASA Technical Reports Server (NTRS)

    Segal, Kenneth N.; Stevens, Edward J.

    1998-01-01

    This presentation focus on the use of metal matrix composite (MMC) material option in spaceflight hardware applications. It addresses the important questions and issues such as: what is SPAM; why the use of MMC; design requirements and flexibility; qualification testing; and flight concerns.

  12. The in-flight calibration of a helicopter-mounted Daedalus multispectral scanner

    SciTech Connect

    Balick, L.K.; Golanics, C.J.; Shines, J.E. (EG and G Energy Measurements, Inc., Las Vegas, NV (USA)); Biggar, S.F.; Slater, P.N. (Arizona Univ., Tucson, AZ (USA). Optical Sciences Center)

    1991-01-01

    A convenient way that has been used to calibrate, in-flight, a helicopter-mounted Daedalus multispectral scanner is described. It used four large canvas panels laid out in a square with a Spectralon panel as a reference. A calibrated Barnes modular multispectral radiometer, carried on a 2.2-m boom was rotated around a 2.5-m high tripod at the center of the square. The radiometer sampled the four large panels and the Spectralon panel once every two minutes. Atmospheric spectral transmittance measurements were made using a filter radiometer on an autotracking mount during the morning of the flight. The reflectance and optical depth data were used in an atmospheric radiative transfer code to predict the spectral radiances at the scanner. The calibration was completed by comparing the image digital counts to the predicted spectral radiances. 7 refs., 2 figs., 5 tabs.

  13. Bioburden release of Ariane 5 Fairing Acoustic Protection Panels

    NASA Astrophysics Data System (ADS)

    Stieglmeier, Michaela; Rohr, Thomas; Schmeitzky, Olivier; Rumler, Peter; Kminek, Gerhard

    The ESA-NASA ExoMars mission will be subject to strict Planetary Protection constrictions. The original ExoMars mission concept was based on an Ariane 5 launch system. Like all launch systems, the Ariane 5 fairing is lined with acoustic protection panels. These panels consist of an outer polyester/cotton fabric and an inner open celled foam. During launch the panels will be exposed to vibrations and a decrease in pressure. A release of possible external and/ or embedded microbes would cause a contamination of the satellite. Planetary Protection requirements for ExoMars imply the determination of the bioburden release from the Ariane 5 Fairing Acoustic Protection Panels (FAP-panels). Thus a study at ESTEC was performed comparing the bioburden release of a sterilized and non-sterilized panel by simulating a launch environment. Panels were mounted in test jigs above a sterile ground plate. Sterile stainless steel witness plates for the determination of bioburden release were mounted on the latter. The launch environment was simulated in two different tests. In a vacuum chamber the panels were exposed to a depressurization event. For the simulation of the vibrations the jigs were mounted in the Large European Acoustic Facility (LEAF) at ESTEC. After each test witness plates were demounted under sterile conditions and analyzed for microbial growth by incubating them in agar. Furthermore pieces of the outer fabric as well as the inner foam were taken and examined for embedded microbes. In total the amount of embedded microbes was very low and there was no significant difference between the sterilized and non-sterilized panel concerning the released bioburden. Thus sterilization of the Ariane 5 FAP-panels seems not necessary to comply with Planetary Protection constraints. Although the ExoMars project will use a different launch system in the new mission concept, the data acquired during these tests can be used for future scientific satellites launched with Ariane 5.

  14. Mount St. Helens

    NASA Technical Reports Server (NTRS)

    2005-01-01

    This Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image of Mount St. Helens was captured one week after the March 8, 2005, ash and steam eruption, the latest activity since the volcano's reawakening in September 2004. The new lava dome in the southeast part of the crater is clearly visible, highlighted by red areas where ASTER's infrared channels detected hot spots from incandescent lava. The new lava dome is 155 meters (500 feet) higher than the old lava dome, and still growing.

    With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters (about 50 to 300 feet), ASTER images Earth to map and monitor the changing surface of our planet.

    ASTER is one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products.

    The broad spectral coverage and high spectral resolution of ASTER provides scientists in numerous disciplines with critical information for surface mapping, and monitoring of dynamic conditions and temporal change. Example applications are: monitoring glacial advances and retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands evaluation; thermal pollution monitoring; coral reef degradation; surface temperature mapping of soils and geology; and measuring surface heat balance.

    The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

    Size: 21.9 by 24.4 kilometers (13.6 by 15.1 miles) Location: 46.2 degrees North latitude, 122.2 degrees West longitude Orientation: North at top Image Data: ASTER bands 8, 3, and 1 Original Data Resolution: 15 meters (49.2 feet) Dates Acquired: March 15, 2005

  15. In-flight calibration of a helicopter-mounted Daedalus multispectral scanner

    Microsoft Academic Search

    Lee K. Balick; Charles J. Golanics; Janet E. Shines; Stuart F. Biggar; Philip N. Slater

    1991-01-01

    A convenient technique that has been used to calibrate, in-flight, a helicopter-mounted Daedalus multispectral scanner is described. It used four large canvas panels laid out in a square with a Spectralon panel as a reference. A calibrated Barnes modular multispectral radiometer, carried on a 2.2-m boom, was rotated around a 2.5-m high tripod at the center of the square. The

  16. Operation and maintenance cost data for residential photovoltaic modules/panels

    SciTech Connect

    None

    1980-07-01

    Burt Hill Kosar Rittelmann Associates has conducted a study to identify and estimate costs associated with the operation and maintenance of residential photovoltaic modules and arrays. Six basic topics related to operation and maintenance to photovoltaic arrays were investigated - General (Normal) Maintenance, Cleaning, Panel Replacement, Gasket Repair/Replacement, Wiring Repair/Replacement, and Termination Repair/Replacement. The effects of the mounting types - Rack Mount, Stand-Off Mount, Direct Mount, and Integral Mount - and the installation/replacement type - Sequential, Partial Interruption, and Independent - have been identified and described. Recommendation on methods of reducing maintenance costs are made.

  17. SXI prototype mirror mount

    NASA Technical Reports Server (NTRS)

    1995-01-01

    The purpose of this contract was to provide optomechanical engineering and fabrication support to the Solar X-ray Imager (SXI) program in the areas of mirror, optical bench and camera assemblies of the telescope. The Center for Applied Optics (CAO) worked closely with the Optics and S&E technical staff of MSFC to develop and investigate the most viable and economical options for the design and fabrication of a number of parts for the various telescope assemblies. All the tasks under this delivery order have been successfully completed within budget and schedule. A number of development hardware parts have been designed and fabricated jointly by MSFC and UAH for the engineering model of SXI. The major parts include a nickel electroformed mirror and a mirror mount, plating and coating of the ceramic spacers, and gold plating of the contact rings and fingers for the camera assembly. An aluminum model of the high accuracy sun sensor (HASS) was also designed and fabricated. A number of fiber optic tapers for the camera assembly were also coated with indium tin oxide and phosphor for testing and evaluation by MSFC. A large number of the SXI optical bench parts were also redesigned and simplified for a prototype telescope. These parts include the forward and rear support flanges, front aperture plate, the graphite epoxy optical bench and a test fixture for the prototype telescope. More than fifty (50) drawings were generated for various components of the prototype telescope. Some of these parts were subsequently fabricated at UAH machine shop or at MSFC or by the outside contractors. UAH also provide technical support to MSFC staff for a number of preliminary and critical design reviews. These design reviews included PDR and CDR for the mirror assembly by United Technologies Optical Systems (UTOS), and the program quarterly reviews, and SXI PDR and CDR. UAH staff also regularly attended the monthly status reviews, and made a significant number of suggestions to improve the design, assembly and alignment of the telescope. Finally, a high level assembly and alignment plan for the entire telescope was prepared by UAH. This plan addresses the sequence of assembly, the required assembly and alignment tolerances, and the methods to verify the alignment at each step during the assembly process. This assembly and alignment plan will be used to assemble and integrate the engineering model (EM) of the telescope. Later on, based on this plan more detailed assembly and alignment procedures will be developed for the lower-level assemblies of SXI.

  18. Kinematic high bandwidth mirror mount

    DOEpatents

    Kuklo, Thomas C. (Oakdale, CA)

    1995-01-01

    An adjustable mirror mount system for a mirror is disclosed comprising a mirror support having a planar surface thereon, a mirror frame containing a mirror and having a planar surface behind the mirror facing the planar surface of the mirror support and parallel to the reflecting surface of the mirror and mounted pivotally to the mirror support at a point central to the frame, a first adjustment means between the mirror support and the mirror frame spaced from the central pivot mount for adjusting the movement of the mirror along one axis lying in the plane of the planar surface of the mirror frame; and a second adjustment means between the mirror support and the mirror frame spaced from the central pivot mount for adjusting the movement of the mirror along a second axis lying in the plane of the planar surface of the mirror frame and perpendicular to the first axis.

  19. Dry tilt network at Mount Rainier, Washington

    USGS Publications Warehouse

    Dzurisin, Daniel; Johnson, Daniel J.; Symonds, R.B.

    1984-01-01

    In addition to its primary responsibility of monitoring active Mount St. Helens, the David A. Johnston Cascades Volcano Observatory (CVO) has been charged with obtaining baseline geodetic and geochemical information at each of the other potentially active Cascade volcanoes. Dry tilt and/or trilateration networks were established during 1975-82 at Mount Baker, Mount St. Helens, Mount Hood, Mount Shasta, Lassen Peak, Crater Lake, and Long Valley caldera; coverage was extended during September 1982 to include Mount Rainier.

  20. Plasma panel-based radiation detectors

    E-print Network

    Peter Friedman; Robert Ball; James Beene; Yan Benhammou; Meny Ben-Moshe; Hassan Bentefour; J. W. Chapman; Erez Etzion; Claudio Ferretti; Daniel Levin; Yiftah Silver; Robert Varner; Curtis Weaverdyck; Bing Zhou

    2013-05-10

    The plasma panel sensor (PPS) is a gaseous micropattern radiation detector under current development. It has many operational and fabrication principles common to plasma display panels. It comprises a dense matrix of small, gas plasma discharge cells within a hermetically sealed panel. As in plasma display panels, it uses nonreactive, intrinsically radiation-hard materials such as glass substrates, refractory metal electrodes, and mostly inert gas mixtures. We are developing these devices primarily as thin, low-mass detectors with gas gaps from a few hundred microns to a few millimeters. The PPS is a high gain, inherently digital device with the potential for fast response times, fine position resolution (<50-mm RMS) and low cost. In this paper, we report on prototype PPS experimental results in detecting betas, protons, and cosmic muons, and we extrapolate on the PPS potential for applications including the detection of alphas, heavy ions at low-to-medium energy, thermal neutrons, and X-rays.

  1. Solar panel driven air purging apparatus for motor vehicles

    Microsoft Academic Search

    J. A. Bobier; G. E. Brown

    1992-01-01

    This patent describes improvement in a motor vehicle having an enclosable cabin an internal combustion engine, a battery, an ignition switch having an on position for enabling the internal combustion engine and an off position, an electric motor coupled in driving relationship with an air circulating fan for circulating air through the cabin. The improvement comprises: a solar panel mounted

  2. Evaluation of image quality and dose on a flat-panel CT-scanner

    Microsoft Academic Search

    M. Grasruck; Ch. Suess; K. Stierstorfer; S. Popescu; T. Flohr

    2005-01-01

    We developed and evaluated a prototype flat-panel detector based Volume CT (VCT) scanner. We focused on improving the image quality using different detector settings and reducing x-ray scatter intensities. For the presented results we used a Varian 4030CB flat-panel detector mounted in a multislice CT-gantry (Siemens Medical Systems). The scatter intensities may severely impair image quality in flat-panel detector CT

  3. GIS Ethics Panel Preparation Panel Session

    E-print Network

    Wright, Dawn Jeannine

    GIS Ethics Panel Preparation Panel Session: 3236 Geographic Information Ethics and GIScience II State University Geney Terry - GISCI Session Description: Ethical engagements with the multitude of GIS, the variety of applications of GIS&T has led the U.S. Department of Labor to highlight "geographic technology

  4. Adjustable two-axis instrument mount

    Microsoft Academic Search

    William H. Nedderman

    1994-01-01

    A two-axis adjustable instrument mount having a fixed base plate, an intermediate plate, and an instrument mount plate is disclosed. The intermediate plate is attached to the base plate by a three-point mount in the shape of an isosceles triangle. The two mounting points corresponding to the base of the triangle include hinge flex plates fixed to the base plate

  5. Basic metabolic panel

    MedlinePLUS

    The basic metabolic panel is a group of blood tests that provides information about your body's metabolism . ... SMAC7; Sequential multi-channel analysis with computer-7; SMA7; Metabolic panel 7; CHEM-7

  6. TRMM Solar Array Panels

    NASA Technical Reports Server (NTRS)

    1998-01-01

    This final report presents conclusions/recommendations concerning the TRMM Solar Array; deliverable list and schedule summary; waivers and deviations; as-shipped performance data, including flight panel verification matrix, panel output detail, shadow test summary, humidity test summary, reverse bias test panel; and finally, quality assurance summary.

  7. 36 Views of Mount Rainier

    ERIC Educational Resources Information Center

    Fortune, Tracy

    2011-01-01

    Look for ways to take students on virtual journeys to faraway places, and then connect the experience to something they can relate to on a more personal level. In this article, the author describes a block-printing unit inspired by Japanese printmaker, Katsushika Hokusai (1760-1849), and his series of art prints, "Thirty-six Views of Mount Fuji."…

  8. Mount St. Helens aerosol evolution

    NASA Technical Reports Server (NTRS)

    Oberbeck, V. R.; Farlow, N. H.; Fong, W.; Snetsinger, K. G.; Ferry, G. V.; Hayes, D. M.

    1982-01-01

    Stratospheric aerosol samples were collected using a wire impactor during the year following the eruption of Mount St. Helens. Analysis of samples shows that aerosol volume increased for 6 months due to gas-to-particle conversion and then decreased to background levels in the following 6 months.

  9. Mount St. Helens aerosol evolution

    SciTech Connect

    Oberbeck, V.R.; Farlow, N.H.

    1982-08-01

    Stratospheric aerosol samples were collected using a wire impactor during the year following the eruption of Mount St. Helens. Analysis of samples shows that aerosol volume increased for 6 months due to gas-to-particle conversion and then decreased to background levels in the following 6 months.

  10. Science Teachers Explore Mount Rainier

    USGS Multimedia Gallery

    Members of the USGS Cascades Volcano Observatory and National Park Service provide a week-long opportunity for teachers to explore Mount Rainier National Park conducting inquiry-based volcano science activities. Here, teachers measure and record the amount of snow that melts over a one-hour period t...

  11. Interactive optical panel

    DOEpatents

    Veligdan, J.T.

    1995-10-03

    An interactive optical panel assembly includes an optical panel having a plurality of ribbon optical waveguides stacked together with opposite ends thereof defining panel first and second faces. A light source provides an image beam to the panel first face for being channeled through the waveguides and emitted from the panel second face in the form of a viewable light image. A remote device produces a response beam over a discrete selection area of the panel second face for being channeled through at least one of the waveguides toward the panel first face. A light sensor is disposed across a plurality of the waveguides for detecting the response beam therein for providing interactive capability. 10 figs.

  12. Interactive optical panel

    DOEpatents

    Veligdan, James T. (Manorville, NY)

    1995-10-03

    An interactive optical panel assembly 34 includes an optical panel 10 having a plurality of ribbon optical waveguides 12 stacked together with opposite ends thereof defining panel first and second faces 16, 18. A light source 20 provides an image beam 22 to the panel first face 16 for being channeled through the waveguides 12 and emitted from the panel second face 18 in the form of a viewable light image 24a. A remote device 38 produces a response beam 40 over a discrete selection area 36 of the panel second face 18 for being channeled through at least one of the waveguides 12 toward the panel first face 16. A light sensor 42,50 is disposed across a plurality of the waveguides 12 for detecting the response beam 40 therein for providing interactive capability.

  13. 76 FR 76689 - Cibola National Forest, Mount Taylor Ranger District, NM, Mount Taylor Combined Exploratory Drilling

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-08

    ...Forest Service Cibola National Forest, Mount Taylor Ranger District, NM, Mount Taylor Combined Exploratory Drilling AGENCY: Forest...drilling on the Cibola National Forest, Mount Taylor Ranger District. There are two areas...

  14. The influence of depth of focus on visibility of monocular head-mounted display symbology in simulation and training applications

    Microsoft Academic Search

    Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Christine Covas; Jennifer Winner

    2005-01-01

    The Joint Helmet Mounted Cueing System (JHMCS),is being considered for integration into the F-15, F-16, and F-18 aircraft. If this integration occurs, similar monocular head-mounted displays (HMDs) will need to be integrated with existing out-the-window simulator systems for training purposes. One such system is the Mobile Modular Display for Advanced Research and Training (M2DART), which is constructed with flat-panel rear-projection

  15. Quaternary glaciation of Mount Everest

    Microsoft Academic Search

    Lewis A. Owen; Ruth Robinson; Douglas I. Benn; Robert C. Finkel; Nicole K. Davis; Chaolu Yi; Jaakko Putkonen; Dewen Li; Andrew S. Murray

    2009-01-01

    The Quaternary glacial history of the Rongbuk valley on the northern slopes of Mount Everest is examined using field mapping, geomorphic and sedimentological methods, and optically stimulated luminescence (OSL) and 10Be terrestrial cosmogenic nuclide (TCN) dating. Six major sets of moraines are present representing significant glacier advances or still-stands. These date to >330ka (Tingri moraine), >41ka (Dzakar moraine), 24–27ka (Jilong

  16. Quaternary glaciation of Mount Everest

    NASA Astrophysics Data System (ADS)

    Owen, Lewis A.; Robinson, Ruth; Benn, Douglas I.; Finkel, Robert C.; Davis, Nicole K.; Yi, Chaolu; Putkonen, Jaakko; Li, Dewen; Murray, Andrew S.

    2009-07-01

    The Quaternary glacial history of the Rongbuk valley on the northern slopes of Mount Everest is examined using field mapping, geomorphic and sedimentological methods, and optically stimulated luminescence (OSL) and 10Be terrestrial cosmogenic nuclide (TCN) dating. Six major sets of moraines are present representing significant glacier advances or still-stands. These date to >330 ka (Tingri moraine), >41 ka (Dzakar moraine), 24-27 ka (Jilong moraine), 14-17 ka (Rongbuk moraine), 8-2 ka (Samdupo moraines) and ˜1.6 ka (Xarlungnama moraine), and each is assigned to a distinct glacial stage named after the moraine. The Samdupo glacial stage is subdivided into Samdupo I (6.8-7.7 ka) and Samdupo II (˜2.4 ka). Comparison with OSL and TCN defined ages on moraines on the southern slopes of Mount Everest in the Khumbu Himal show that glaciations across the Everest massif were broadly synchronous. However, unlike the Khumbu Himal, no early Holocene glacier advance is recognized in the Rongbuk valley. This suggests that the Khumbu Himal may have received increased monsoon precipitation in the early Holocene to help increase positive glacier mass balances, while the Rongbuk valley was too sheltered to receive monsoon moisture during this time and glaciers could not advance. Comparison of equilibrium-line altitude depressions for glacial stages across Mount Everest reveals asymmetric patterns of glacier retreat that likely reflects greater glacier sensitivity to climate change on the northern slopes, possibly due to precipitation starvation.

  17. Compression buckling behavior of laminated composite panels

    SciTech Connect

    Parida, B.K.; Prakash, R.V.; Ghosal, A.K. [National Aerospace Labs., Bangalore (India); Mangalgiri, P.D.; Vijayaraju, K. [Aeronautical Development Agency, Bangalore (India)

    1997-12-31

    Experimental simulation of boundary conditions while carrying out a panel buckling test has been known to be difficult. In this paper, compression buckling tests on 6.0-mm-thick carbon fiber composite (CFC) panels have been described for which a reasonably good simulation of the boundary condition was achieved, especially under the simple supported condition. Carefully designed test fixtures that provided excellent alignment of the panel with the loading axis and adequate lateral stiffness for edge supports during buckling of the CFC panels were used to achieve this goal. Both simply supported and clamped boundary conditions have been studied. Tests in room-temperature-as-received (RT/AR) and hot-wet (H/W) conditions are described. A buckling test on a simply supported panel with prior moisture conditioning was performed under the H/W condition with an environmental test chamber mounted on the test rig to prevent any loss of moisture during the test at 100 C and {ge}85% relative humidity. Based on these results, a test procedure was developed to identify buckling loads through measurement of out-of-plane displacements rather than relying solely upon longitudinal strain measurement. This procedure facilitated estimation of the buckling load of a hydrothermally aged and simply supported CFC panel under the H/W condition, where accurate strain measurements were found to be rather difficult and at times unreliable. Experimental results were compared with those obtained from finite element analysis with regard to the buckling loads and corresponding mode shapes for the boundary conditions considered. The effect of rounding off the knife edges used for the simply supported condition was specifically studied during FEM analysis and was found to be significant.

  18. Titanium Honeycomb Panel Testing

    NASA Technical Reports Server (NTRS)

    Richards, W. Lance; Thompson, Randolph C.

    1996-01-01

    Thermal-mechanical tests were performed on a titanium honeycomb sandwich panel to experimentally validate the hypersonic wing panel concept and compare test data with analysis. Details of the test article, test fixture development, instrumentation, and test results are presented. After extensive testing to 900 deg. F, non-destructive evaluation of the panel has not detected any significant structural degradation caused by the applied thermal-mechanical loads.

  19. Ballast-mounted PV arrays: Phase 2 final report

    SciTech Connect

    Edward C. Kern

    2000-03-01

    The expansive flat rooftops of industrial and commercial buildings across America offer the largest, most secure, and potentially least-cost real estate opportunity to install massive amounts of solar photovoltaic generation in the building sector. Unfortunately, mechanical penetration of roofing membranes is very expensive and perceived by building owners and operators to increase the likelihood of leaking. In response Ascension Technology has pioneered the development of low-cost ballasted approaches for mounting PV arrays. Recently, however, we have experienced our first two instances in which strong winds have moved our arrays on rooftops and heightened our interest, and the PV industries' need, to develop zero-penetration mounting techniques that are more secure, yet remain low in cost. In this PV BONUS project, Ascension Technology and its partners addressed wind loading on solar panels and the suitability of using frictional forces between ballast trays and roofing materials to resist PV arrays sliding on rooftops. The primary goal of the project is to capture the potential cost savings made possible by ballast-mounting by showing under what conditions it can satisfy wind loading concerns. A secondary goal is to address a more geographically constrained concern regarding withstanding seismic forces.

  20. PANEL LIBRARY AND EDITOR

    NASA Technical Reports Server (NTRS)

    Raible, E.

    1994-01-01

    The Panel Library and Editor is a graphical user interface (GUI) builder for the Silicon Graphics IRIS workstation family. The toolkit creates "widgets" which can be manipulated by the user. Its appearance is similar to that of the X-Windows System. The Panel Library is written in C and is used by programmers writing user-friendly mouse-driven applications for the IRIS. GUIs built using the Panel Library consist of "actuators" and "panels." Actuators are buttons, dials, sliders, or other mouse-driven symbols. Panels are groups of actuators that occupy separate windows on the IRIS workstation. The application user can alter variables in the graphics program, or fire off functions with a click on a button. The evolution of data values can be tracked with meters and strip charts, and dialog boxes with text processing can be built. Panels can be stored as icons when not in use. The Panel Editor is a program used to interactively create and test panel library interfaces in a simple and efficient way. The Panel Editor itself uses a panel library interface, so all actions are mouse driven. Extensive context-sensitive on-line help is provided. Programmers can graphically create and test the user interface without writing a single line of code. Once an interface is judged satisfactory, the Panel Editor will dump it out as a file of C code that can be used in an application. The Panel Library (v9.8) and Editor (v1.1) are written in C-Language (63%) and Scheme, a dialect of LISP, (37%) for Silicon Graphics 4D series workstations running IRIX 3.2 or higher. Approximately 10Mb of disk space is required once compiled. 1.5Mb of main memory is required to execute the panel editor. This program is available on a .25 inch streaming magnetic tape cartridge in UNIX tar format for an IRIS, and includes a copy of XScheme, the public-domain Scheme interpreter used by the Panel Editor. The Panel Library Programmer's Manual is included on the distribution media. The Panel Library and Editor were released to COSMIC in 1991. Silicon Graphics, IRIS, and IRIX are trademarks of Silicon Graphics, Inc. X-Window System is a trademark of Massachusetts Institute of Technology.

  1. Mounting assembly for heater thermostat control

    Microsoft Academic Search

    1987-01-01

    This patent describes an assembly for mounting a thermostat control on the outer wall of a heater tank including an external spud in which a heating element is mounted. The mounting assembly comprises: a first bracket made from a spring material and including a body having an opening adapted to lockingly fit over the tank spud. The first bracket further

  2. Scattering matrices of volcanic ash particles of Mount St. Helens, Redoubt, and Mount Spurr Volcanoes

    E-print Network

    Rose, William I.

    Scattering matrices of volcanic ash particles of Mount St. Helens, Redoubt, and Mount Spurr: the 18 May 1980 Mount St. Helens eruption, the 1989­1990 Redoubt eruption, and the 18 August and 17 are not known. The measured results for the Mount St. Helens sample have been compared with results of Lorenz

  3. SNP panels/Imputation

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Participants from thirteen countries discussed services that Interbull can perform or recommendations that Interbull can make to promote harmonization and assist member countries in improving their genomic evaluations in regard to SNP panels and imputation. The panel recommended: A mechanism to shar...

  4. Vehicle Systems Panel deliberations

    Microsoft Academic Search

    Tom Bales; Tom Modlin; Jack Suddreth; Tom Wheeler; Darrel R. Tenney; Ernest O. Bayless; W. Barry Lisagor; Donald A. Bolstad; Harold Croop; J. Dyer

    1993-01-01

    The Vehicle Systems Panel addressed materials and structures technology issues related to launch and space vehicle systems not directly associated with the propulsion or entry systems. The Vehicle Systems Panel was comprised of two subpanels - Expendable Launch Vehicles & Cryotanks (ELVC) and Reusable Vehicles (RV). Tom Bales, LaRC, and Tom Modlin, JSC, chaired the expendable and reusable vehicles subpanels,

  5. AEROSPACE SAFETY ADVISORY PANEL

    E-print Network

    Waliser, Duane E.

    AEROSPACE SAFETY ADVISORY PANEL ANNUAL REPORT FOR 20! 3 #12;. #12;NASA AEROSPACE SAFETY ADVISORY) is pleased to submit the ASAP Annual Report for 2013 to the U.S. Congress and to the Administrator of the National Aeronautics and Space Administration (NASA). This report is based on the Panel's 2013 fact

  6. Advanced solar panel designs

    Microsoft Academic Search

    E. L. Ralph; E. Linder

    1995-01-01

    This paper describes solar cell panel designs that utilize new hgih efficiency solar cells along with lightweight rigid panel technology. The resulting designs push the W\\/kg and W\\/sq m parameters to new high levels. These new designs are well suited to meet the demand for higher performance small satellites. This paper reports on progress made on two SBIR Phase 1

  7. Microgravity Science Research Panel

    NASA Technical Reports Server (NTRS)

    Carpenter, Bradley M.; Trinh, Eugene H.; DeLucas, Lawrence J.; Larson, David; Koss, Matthew; Ostrach, Simon

    2000-01-01

    This document is a transcription of the Microgravity Science Research Panel's discussion about their research and about some of the contributions that they feel have been important to the field during their time with the program. The panel includes Dr. Eugene Trinh, Dr. Lawrence DeLucas, Dr. Charles Bugg, Dr. David Larson, and Dr. Simon Ostrach.

  8. Closing Panel Question & Answer

    E-print Network

    Moore, Paul A.

    N E X T #12;Closing Panel Question & Answer REDDIN SYMPOSIUM XXI CANADIAN STUDIES"Unsecure"World Question and Answer Inuit Rights and Responsibilities in the Changing North Question & Answer Environmental to translate science into public policy. 1 #12;Closing Panel Question & Answer REDDIN SYMPOSIUM XXI CANADIAN

  9. Dual resolution, vacuum compatible optical mount

    DOEpatents

    Halpin, John Michael (Tracy, CA)

    2011-10-04

    An optical mount for an optical element includes a mounting plate, a lever arm pivot coupled to mounting plate, and an adjustment plate. The optical mount also includes a flexure pivot mechanically coupling the adjustment plate to the mounting plate and a lever arm. The optical mount further includes a first adjustment device extending from the adjustment plate to make contact with the lever arm at a first contact point. A projection of a line from the first contact point to a pivot point, measured along the lever arm, is a first predetermined distance. The optical mount additionally includes a second adjustment device extending from the adjustment plate to make contact with the lever arm at a second contact point. A projection of a line from the second contact point to the pivot point, measured along the lever arm, is a second predetermined distance greater than the first predetermined distance.

  10. Mount Apatite Park, Auburn, Maine

    NSDL National Science Digital Library

    This guide discusses the geology, mineralogy, and mineral collecting opportunities of the Mount Apatite quarries at Auburn, Maine. Topics include the history and occurrence of the granite pegmatites, which contain collectible specimens of apatite, tourmaline, lepidolite, and other minerals; the history of glaciation in the area; and the history of the mining industry in Auburn, an important producer of commercial feldspar in the early 1900s. There is also information for mineral collectors, including permission and access, directions, and information on the exposures and how to extract specimens from them. References and links to additonal information are included.

  11. Bulb mounting of solar cell

    SciTech Connect

    Thompson, M.E.

    1983-04-05

    An energy converting assembly is provided for parasiting of light from a fluorescent light bulb utilizing a solar cell. The solar cell is mounted on a base member elongated in the dimension of elongation of the fluorescent bulb, and electrical interconnections to the cell are provided. A flexible sheet of opaque material having a flat white interior reflective surface surrounds the fluorescent bulb and reflects light emitted from the bulb back toward the bulb and the solar cell. The reflective sheet is tightly held in contact with the bottom of the bulb by adhesive, a tie strap, an external clip, or the like.

  12. Evolution of integrated panel structural design and interfaces for PV power plants

    NASA Technical Reports Server (NTRS)

    Arnett, J. C.; Anderson, A. J.; Robertson, R. E.

    1983-01-01

    The evolution of integrated photovoltaic (PV) panel design at ARCO Solar is discussed. Historically, framed PV modules of about 1 x 4-ft size were individually mounted in the field on fixed support structures and interconnected electrically with cables to build higher-power arrays. When ARCO Solar saw the opportunity in 1982 to marry its PV modules with state-of-the-art heliostat trackers developed by ARCO Power Systems, it became obvious that mounting individual modules was impractical. For this project, the framed modules were factory-assembled into panels and interconnected with cables before being mounted on the trackers. Since then, ARCO Solar made considerable progress and gained substantial experience in the design and fabrication of large PV panels. Constraints and criteria considered in these design activities included static and dynamic loads; assembly and transportation equipment and logistics, structural and electrical interfaces, and safety and grounding concerns.

  13. Examination of operational dynamics of radiant ceiling panel

    NASA Astrophysics Data System (ADS)

    Dudkiewicz, Edyta; Jadwiszczak, Piotr; Je?owiecki, Janusz

    2011-06-01

    Radiant ceiling panels can be used in large-volume halls, e.g. vehicle repair shops and markets, to heat the entire or specific zones of the enclosed space. The system with radiant panels may be of small water capacity when just one or several units are installed over selected zones to provide additional heating. Depending on dimensions of radiant ceiling panel, its mounting mode and the temperature of its feeding medium, various thermal conditions are created under such panel. Thermal effects are also affected by the mode of thermal or cooling power control and dynamics of such control for an individual radiant panel or a set of panels. The dynamics of attainable radiant ceiling panel capacity was investigated and used as the grounds to determine general requirements for time-domain automatic control programs and those for operation of the controllers. The results presented from the examinations carried out for water radiators are not intended to delineate the requirements for all automatic control loops for water radiators; they are aimed at attracting attention to issues to be considered when preparing the algorithm of automatic control in particular situations.

  14. Panel 5: Microbiology and Immunology Panel

    PubMed Central

    Murphy, Timothy F.; Chonmaitree, Tasnee; Barenkamp, Stephen; Kyd, Jennelle; Nokso-Koivisto, Johanna; Patel, Janak A.; Heikkinen, Terho; Yamanaka, Noboru; Ogra, Pearay; Swords, W. Edward; Sih, Tania; Pettigrew, Melinda M.

    2014-01-01

    Objective The objective is to perform a comprehensive review of the literature from January 2007 through June 2011 on the virology, bacteriology, and immunology related to otitis media. Data Sources PubMed database of the National Library of Medicine. Review Methods Three subpanels with co-chairs comprising experts in the virology, bacteriology, and immunology of otitis media were formed. Each of the panels reviewed the literature in their respective fields and wrote draft reviews. The reviews were shared with all panel members, and a second draft was created. The entire panel met at the 10th International Symposium on Recent Advances in Otitis Media in June 2011 and discussed the review and refined the content further. A final draft was created, circulated, and approved by the panel. Conclusion Excellent progress has been made in the past 4 years in advancing an understanding of the microbiology and immunology of otitis media. Advances include laboratory-based basic studies, cell-based assays, work in animal models, and clinical studies. Implications for Practice The advances of the past 4 years formed the basis of a series of short-term and long-term research goals in an effort to guide the field. Accomplishing these goals will provide opportunities for the development of novel interventions, including new ways to better treat and prevent otitis media. PMID:23536533

  15. Diesel particulate trap mounting system

    SciTech Connect

    Miller, P.R.

    1992-01-21

    This patent describes a particulate trap assembly. It comprises an outer housing having a gas inlet and a gas outlet and a passageway interconnecting the gas inlet and the gas outlet; a particulate trapping means located within the passageway of the housing for trapping particles entrained in gas passing through the passageway, the passageway and the particulate trapping means having circumferential extents which fall within relatively large predetermined manufacturing tolerances respectively; tourniquet means surrounding the particulate trapping means for applying a predetermined radial pressure to the trapping means which is substantially independent of the circumferential extents of the passageway and the including an encircling element having a selectably adjustable circumferential extent for permitting the tourniquet means to conform to the circumferential extent of the particulate trapping means when mounted in compressive relationship about the particulate trapping means, and mounting means for retaining the particulate trapping means radially and axially within the passageway in a manner which imposes no further substantial radial compressive force to the particulate trapping means.

  16. POPOVER Review Panel report

    SciTech Connect

    Davito, A.; Baker, C.J.; King, C.J.; Costerus, B.; Nelson, T.; Prokosch, D.; Pastrnak, J.; Grace, P.

    1996-04-10

    The POPOVER series of high explosive (HE) certification tests was conducted at the Big Explosives Experimental Facility (BEEF) in Area 4 of the Nevada Test Site (NTS). The two primary objectives of POPOVER were to certify that: (1) BEEF meets DOE requirements for explosives facilities and is safe for personnel-occupied operations during testing of large charges of conventional HE. (2) Facility structures and equipment will function as intended when subjected to the effects of these charges. After careful analysis of test results, the POPOVER Review Panel concludes that the POPOVER series met both objectives. Further details on the Review Panel`s conclusions are included in Section 7--Findings and Recommendations.

  17. Mount St. Helens: the aftermath

    SciTech Connect

    Flaherty, D.C.

    1983-01-01

    During the May 18, 1980 eruption of Mount St. Helens, ash fell over a 100,000 sq mile area to the east. The Idaho studies showed that, although the ashfall altered the food chains of some forest streams, within a year they fully recovered. The effects of ashfall on lake benthic organisms are still being assessed by sediment sampling. The Montana studies reported on snow avalanche models adapted to mudflows, trophic impact of ash deposits on Montana lakes, and the volcanic ash as nutrient subsidy to sub-alpine lakes. The Oregon studies reported herring and smelt egg and larvae damage due to suspended ash. The drainage patterns in eruption debris were studied along with the filling of Columbia River berths with ash.

  18. Mounting and Alignment of IXO Mirror Segments

    NASA Technical Reports Server (NTRS)

    Chan, Kai-Wing; Zhang, William; Evans, Tyler; McClelland, Ryan; Hong, Melinda; Mazzarella, James; Saha, Timo; Jalota, Lalit; Olsen, Lawrence; Byron, Glenn

    2010-01-01

    A suspension-mounting scheme is developed for the IXO (International X-ray Observatory) mirror segments in which the figure of the mirror segment is preserved in each stage of mounting. The mirror, first fixed on a thermally compatible strongback, is subsequently transported, aligned and transferred onto its mirror housing. In this paper, we shall outline the requirement, approaches, and recent progress of the suspension mount processes.

  19. Optical Mounts for Cryogenic Beam Splitters

    NASA Technical Reports Server (NTRS)

    Rudman, A. A.

    1985-01-01

    Spring-loaded optical mounts maintain flatness and alinement of rigid, framed, or pellicle beam splitters over wide temperature range, despite differences in thermal expansion amoung materials. Mounts permit optical adjustments at ambient temperature even though optical system operated subsequently within few degrees of absolute zero. Mounts useful as holders for integrated-circuit master patterns, survey targets, vibrating membranes, noise- or pressure-sensing membranes, osmosis filters, and fuel-cell elements.

  20. Holographic center high-mounted stoplight

    NASA Astrophysics Data System (ADS)

    Smith, Ronald T.

    1991-07-01

    The holographic center high mounted stoplight achieves the required performance of a conventional center high mounted stoplight, but without the obstruction to the driver's view through the rear window. A lamp located in the roof illuminates a transmission image hologram mounted on the inner surface of the automobile rear window. The hologram strongly diffracts the incident light rearward but is transparent to the driver looking in his rearview mirror.

  1. Panel acoustic contribution analysis.

    PubMed

    Wu, Sean F; Natarajan, Logesh Kumar

    2013-02-01

    Formulations are derived to analyze the relative panel acoustic contributions of a vibrating structure. The essence of this analysis is to correlate the acoustic power flow from each panel to the radiated acoustic pressure at any field point. The acoustic power is obtained by integrating the normal component of the surface acoustic intensity, which is the product of the surface acoustic pressure and normal surface velocity reconstructed by using the Helmholtz equation least squares based nearfield acoustical holography, over each panel. The significance of this methodology is that it enables one to analyze and rank relative acoustic contributions of individual panels of a complex vibrating structure to acoustic radiation anywhere in the field based on a single set of the acoustic pressures measured in the near field. Moreover, this approach is valid for both interior and exterior regions. Examples of using this method to analyze and rank the relative acoustic contributions of a scaled vehicle cabin are demonstrated. PMID:23363099

  2. Honeycomb-panel spacecraft radiator with multichip module thermal analysis and vacuum-testing

    Microsoft Academic Search

    John Chapter

    1997-01-01

    This paper documents a thermal vacuum test and analysis of three small honeycomb panels for spacecraft application. The prime purpose of this test was to characterize the thermal performance of 24.1 cm×31.8 cm (9.5 in×12.5 in) honeycomb panels that use composite face-sheets with a power dissipating Multichip Module (MCM) mounted on one side. The test MCM simulates electronic circuits and

  3. Gas filled panel insulation

    DOEpatents

    Griffith, B.T.; Arasteh, D.K.; Selkowitz, S.E.

    1993-12-14

    A structural or flexible highly insulative panel which may be translucent, is formed from multi-layer polymeric material in the form of an envelope surrounding a baffle. The baffle is designed so as to minimize heat transfer across the panel, by using material which forms substantially closed spaces to suppress convection of the low conductivity gas fill. At least a portion of the baffle carries a low emissivity surface for suppression of infrared radiation. 18 figures.

  4. Hexagon solar power panel

    NASA Technical Reports Server (NTRS)

    Rubin, I. (inventor)

    1978-01-01

    A solar energy panel support is described upon which silicon cells are arrayed. The cells are wafer thin and of two geometrical types, both of the same area and electrical rating, namely hexagon cells and hourglass cells. The hourglass cells are composites of half hexagons. A near perfect nesting relationship of the cells achieves a high density packing whereby optimum energy production per panel area is achieved.

  5. Heat Pipe Thermal Conditioning Panel

    NASA Technical Reports Server (NTRS)

    Saaski, E. W.

    1973-01-01

    The development, fabrication, and evaluation of heat pipe thermal conditioning panels are discussed. The panels were designed and fabricated to be compatible with several planned NASA space vehicles, in terms of panel size, capacity, temperature gradients, and integration with various heat exchangers and electronic components. It was satisfactorily demonstrated that the heat pipe thermal conditioning panel meets the thermal efficiency and heat transport requirements.

  6. Aerospace Safety Advisory Panel

    NASA Technical Reports Server (NTRS)

    1998-01-01

    During 1997, the Aerospace Safety Advisory Panel (ASAP) continued its safety reviews of NASA's human space flight and aeronautics programs. Efforts were focused on those areas that the Panel believed held the greatest potential to impact safety. Continuing safe Space Shuttle operations and progress in the manufacture and testing of primary components for the International Space Station (ISS) were noteworthy. The Panel has continued to monitor the safety implications of the transition of Space Shuttle operations to the United Space Alliance (USA). One area being watched closely relates to the staffing levels and skill mix in both NASA and USA. Therefore, a section of this report is devoted to personnel and other related issues that are a result of this change in NASA's way of doing business for the Space Shuttle. Attention will continue to be paid to this important topic in subsequent reports. Even though the Panel's activities for 1997 were extensive, fewer specific recommendations were formulated than has been the case in recent years. This is indicative of the current generally good state of safety of NASA programs. The Panel does, however, have several longer term concerns that have yet to develop to the level of a specific recommendation. These are covered in the introductory material for each topic area in Section 11. In another departure from past submissions, this report does not contain individual findings and recommendations for the aeronautics programs. While the Panel devoted its usual efforts to examining NASA's aeronautic centers and programs, no specific recommendations were identified for inclusion in this report. In lieu of recommendations, a summary of the Panel's observations of NASA's safety efforts in aeronautics and future Panel areas of emphasis is provided. With profound sadness the Panel notes the passing of our Chairman, Paul M. Johnstone, on December 17, 1997, and our Staff Assistant, Ms. Patricia M. Harman, on October 5, 1997. Other changes to the Panel composition during the past year were: the resignation of Mr. Dennis E. Fitch as a Consultant; the appointment of Mr. Roger D. Schaufele as a Consultant; and the assignment of Ms. Susan M. Smith as Staff Assistant.

  7. Predicting the vibroacoustic response of satellite equipment panels.

    PubMed

    Conlon, S C; Hambric, S A

    2003-03-01

    Modern satellites are constructed of large, lightweight equipment panels that are strongly excited by acoustic pressures during launch. During design, performing vibroacoustic analyses to evaluate and ensure the integrity of the complex electronics mounted on the panels is critical. In this study the attached equipment is explicitly addressed and how its properties affect the panel responses is characterized. FEA and BEA methods are used to derive realistic parameters to input to a SEA hybrid model of a panel with multiple attachments. Specifically, conductance/modal density and radiation efficiency for nonhomogeneous panel structures with and without mass loading are computed. The validity of using the spatially averaged conductance of panels with irregular features for deriving the structure modal density is demonstrated. Maidanik's proposed method of modifying the traditional SEA input power is implemented, illustrating the importance of accounting for system internal couplings when calculating the external input power. The predictions using the SEA hybrid model agree with the measured data trends, and are found to be most sensitive to the assumed dynamic mass ratio (attachments/structure) and the attachment internal loss factor. Additional experimental and analytical investigations are recommended to better characterize dynamic masses, modal densities and loss factors. PMID:12656381

  8. Optimization of aircraft interior panels

    NASA Technical Reports Server (NTRS)

    Kourtides, Demetrius A.; Roper, Willard D.

    1986-01-01

    Eight different graphite composite panels were fabricated using four different resin matrices. The resin matrices included Hercules 71775, a blend of vinylpolystyrpyridine and bismaleimide, H795, a bismaleimide, Cycom 6162, a phenolic, and PSP 6022M, a polystyrylpyridine. Graphite panels were fabricated using fabric or unidirectional tape. This report describes the processes for preparing these panels and some of their mechanical, thermal and flammability properties. Panel properties are compared with state-of-the-art epoxy fiberglass composite panels.

  9. Mount Meager landslide flow history

    NASA Astrophysics Data System (ADS)

    Moretti, Laurent; Allstadt, Kate; Mangeney, Anne; Yann, capdeville; Eleonore, Stutzmann; François, Bouchut

    2014-05-01

    Gravitational instabilities, such as landslides, avalanches, or debris flows, play a key role in erosional processes and represent one of the major natural hazards in mountainous, coastal, and volcanic regions. Despite the great amount of field, experimental and numerical work devoted to this problem, the understanding of the physical processes at work in gravitational flows is still an open issue, in particular due to the lack of observations relevant to their dynamics. In this context, the seismic signal generated by gravitational flows is a unique opportunity to obtain information on their dynamics. Indeed, as shown recently by Favreau et al., (2010), simulation of the seismic signal generated by landslides makes it possible to discriminate different flow scenarios and estimate rheological parameters. Global and regional seismic networks continuously record gravitational instabilities, so this new method will help gather new data on landslide behavior, particularly when combined with a landslide numerical modeling. Using this approach, we focus on the 6 August 2010 Mount Meager landslide: a 48.5 Mm3 rockslide-debris flow occurring in the Mount Meager Volcanic complex in the Southwest British Columbia. This landslide traveled over 12.7 km in just a few minutes time and was recorded by 25 broadband seismic stations. The time history of the forces exerted by the landslide on the ground surface was inverted from the seismic waveforms. The forcing history revealed the occurrence of a complicated initiation and showed features attributable to flow over a complicated path that included two sharp turns and runup at a valley wall barrier. To reliably interpret this signal and thus obtain detailed information about the dynamics of the landslide, we ran simulations for a range of scenarios by varying the coefficient of friction and the number, mass, and timings of subevents and compute the forces generated in each case. By comparing the results of these simulations to the forces obtained from the seismic data, we are able to reconstruct the event and better understand its dynamics in unprecedented detail.

  10. Flexible pivot mount eliminates friction and hysteresis

    NASA Technical Reports Server (NTRS)

    Highman, C. O.

    1970-01-01

    Flexible steel pivot mount, suspended by flat vertical beryllium copper springs, is capable of rotation, free of hysteresis and starting friction. Mount requires no lubrication, is made in varying sizes, and is driven with either dc torque motor or mechanical linkage.

  11. Microrobotic Protein Crystal Mounting Under Visual Guidance

    E-print Network

    Georgiev, Atanas

    1 Microrobotic Protein Crystal Mounting Under Visual Guidance Atanas Georgiev, Member, IEEE, Peter for protein crystal micro-manipulation. The specific task we focus on is the automated crystal mounting for X of proteins, the product of genes. A large coordinated effort is underway worldwide to master the process

  12. A flexible cruciform journal bearing mount

    NASA Technical Reports Server (NTRS)

    Frost, A. E.; Geiger, W. A.

    1973-01-01

    Flexible mount achieves low roll, pitch and yaw stiffnesses while maintaining high radial stiffness by holding bearing pad in fixed relationship to deep web cruciform member and holding this member in fixed relationship to bearing support. This mount has particular application in small, high performance gas turbines.

  13. Helmet-Mounted Liquid-Crystal Display

    NASA Technical Reports Server (NTRS)

    Smith, Steve; Plough, Alan; Clarke, Robert; Mclean, William; Fournier, Joseph; Marmolejo, Jose A.

    1991-01-01

    Helmet-mounted binocular display provides text and images for almost any wearer; does not require fitting for most users. Accommodates users from smallest interpupillary distance to largest. Two liquid-crystal display units mounted in helmet. Images generated seen from any position head can assume inside helmet. Eyes directed to position for best viewing.

  14. Three-point spherical mirror mount

    DOEpatents

    Cutburth, R.W.

    1984-01-23

    A three-point spherical mirror mount for use with lasers is disclosed. The improved mirror mount is adapted to provide a pivot ring having an outer surface with at least three spaced apart mating points to engage an inner spherical surface of a support housing.

  15. Technique for mounting pyroelectric detector arrays

    NASA Technical Reports Server (NTRS)

    Breckenridge, R. A.; Fripp, A. L.; Robertson, J. B.

    1980-01-01

    Technique is developed at Langley Research Center for mounting pyroelectric detector arrays on silicon integrated circuits. Procedure incorporates normal silicon integrated-circuit technology to form quasi-free mounts for detector arrays. Advantages of technique include lower cost, better image registration, and improved reliability.

  16. GPS Attitude Determination Using Deployable-Mounted Antennas

    NASA Technical Reports Server (NTRS)

    Osborne, Michael L.; Tolson, Robert H.

    1996-01-01

    The primary objective of this investigation is to develop a method to solve for spacecraft attitude in the presence of potential incomplete antenna deployment. Most research on the use of the Global Positioning System (GPS) in attitude determination has assumed that the antenna baselines are known to less than 5 centimeters, or one quarter of the GPS signal wavelength. However, if the GPS antennas are mounted on a deployable fixture such as a solar panel, the actual antenna positions will not necessarily be within 5 cm of nominal. Incomplete antenna deployment could cause the baselines to be grossly in error, perhaps by as much as a meter. Overcoming this large uncertainty in order to accurately determine attitude is the focus of this study. To this end, a two-step solution method is proposed. The first step uses a least-squares estimate of the baselines to geometrically calculate the deployment angle errors of the solar panels. For the spacecraft under investigation, the first step determines the baselines to 3-4 cm with 4-8 minutes of data. A Kalman filter is then used to complete the attitude determination process, resulting in typical attitude errors of 0.50.

  17. Panel methods: An introduction

    NASA Technical Reports Server (NTRS)

    Erickson, Larry L.

    1990-01-01

    Panel methods are numerical schemes for solving (the Prandtl-Glauert equation) for linear, inviscid, irrotational flow about aircraft flying at subsonic or supersonic speeds. The tools at the panel-method user's disposal are (1) surface panels of source-doublet-vorticity distributions that can represent nearly arbitrary geometry, and (2) extremely versatile boundary condition capabilities that can frequently be used for creative modeling. Panel-method capabilities and limitations, basic concepts common to all panel-method codes, different choices that were made in the implementation of these concepts into working computer programs, and various modeling techniques involving boundary conditions, jump properties, and trailing wakes are discussed. An approach for extending the method to nonlinear transonic flow is also presented. Three appendices supplement the main test. In appendix 1, additional detail is provided on how the basic concepts are implemented into a specific computer program (PANAIR). In appendix 2, it is shown how to evaluate analytically the fundamental surface integral that arises in the expressions for influence-coefficients, and evaluate its jump property. In appendix 3, a simple example is used to illustrate the so-called finite part of the improper integrals.

  18. Oven wall panel construction

    DOEpatents

    Ellison, Kenneth (20 Avondale Cres., Markham, CA); Whike, Alan S. (R.R. #1, Caledon East, both of Ontario, CA)

    1980-04-22

    An oven roof or wall is formed from modular panels, each of which comprises an inner fabric and an outer fabric. Each such fabric is formed with an angle iron framework and somewhat resilient tie-bars or welded at their ends to flanges of the angle irons to maintain the inner and outer frameworks in spaced disposition while minimizing heat transfer by conduction and permitting some degree of relative movement on expansion and contraction of the module components. Suitable thermal insulation is provided within the module. Panels or skins are secured to the fabric frameworks and each such skin is secured to a framework and projects laterally so as slidingly to overlie the adjacent frame member of an adjacent panel in turn to permit relative movement during expansion and contraction.

  19. Vehicle Systems Panel deliberations

    NASA Technical Reports Server (NTRS)

    Bales, Tom; Modlin, Tom; Suddreth, Jack; Wheeler, Tom; Tenney, Darrel R.; Bayless, Ernest O.; Lisagor, W. Barry; Bolstad, Donald A.; Croop, Harold; Dyer, J.

    1993-01-01

    The Vehicle Systems Panel addressed materials and structures technology issues related to launch and space vehicle systems not directly associated with the propulsion or entry systems. The Vehicle Systems Panel was comprised of two subpanels - Expendable Launch Vehicles & Cryotanks (ELVC) and Reusable Vehicles (RV). Tom Bales, LaRC, and Tom Modlin, JSC, chaired the expendable and reusable vehicles subpanels, respectively, and co-chaired the Vehicle Systems Panel. The following four papers are discussed in this section: (1) Net Section components for Weldalite Cryogenic Tanks, by Don Bolstad; (2) Build-up Structures for Cryogenic Tanks and Dry Bay Structural Applications, by Barry Lisagor; (3) Composite Materials Program, by Robert Van Siclen; (4) Shuttle Technology (and M&S Lessons Learned), by Stan Greenberg.

  20. Advanced solar panel designs

    SciTech Connect

    Ralph, E.L.; Linder, E.

    1995-10-01

    This paper describes solar cell panel designs that utilize new high efficiency solar cells along with lightweight rigid panel technology. The resulting designs push the W/kg and W/sq m parameters to new high levels. These new designs are well suited to meet the demand for higher performance small satellites. This paper reports on progress made on two SBIR Phase 1 contracts. One panel design involved the use of large area (5.5 cm x 6.5 cm) GaAs/Ge solar cells of 19% efficiency combined with a lightweight rigid graphite fiber epoxy isogrid substrate configuration. A coupon (38 cm x 38 cm) was fabricated and tested which demonstrated an array specific power level of 60 W/kg with a potential of reaching 80 W/kg. The second panel design involved the use of newly developed high efficiency (22%) dual junction GaInP2/GaAs/Ge solar cells combined with an advanced lightweight rigid substrate using aluminum honeycomb core with high strength graphite fiber mesh facesheets. A coupon (38 cm x 38 cm) was fabricated and tested which demonstrated an array specific power of 105 W/kg and 230 W/sq m. This paper will address the construction details of the panels and an analysis of the component weights. A strawman array design suitable for a typical small-sat mission is described for each of the two panel design technologies being studied. Benefits in respect to weight reduction, area reduction, and system cost reduction are analyzed and compared to conventional arrays.

  1. Primary succession in Mount Pinatubo

    PubMed Central

    Marler, Thomas E; del Moral, Roger

    2013-01-01

    Vegetation structure on the east flank of Mount Pinatubo was investigated to determine the inventory of species at 15 y post-eruption, then to ascertain environmental variables that have influenced the early patterns of primary succession. Unconstrained and constrained ordination methods were used to determine the influence of spatial, elevation, and substrate patterns on vegetation. Vegetation was assigned to one of 3 habitat types. Scours were eroded flat surfaces, terraces were perched flat surfaces, and talus piles were created along the canyon edges as mass waste events. The influence of habitat type on vegetation was multifaceted because they represent different conditions and different histories. The talus piles have preferential access to colonists from the vegetation on the canyon walls above and a more benign microclimate than the exposed terrace and scour sites. Scoured sites on the valley floor exhibited the least vegetation cover, as these substrates had the least mature surfaces and the most restricted capacity for root exploration. Perched terraces exhibited greater plant dominance than did the other habitats in the early stages of succession because of the ubiquitous appearance of Parasponia rugosa as initial colonists on these relatively flat surfaces. Polynomial canonical correspondence analysis was more closely aligned with the pattern of vegetation than linear canonical correspondence analysis, and therefore more closely approximated accurate descriptions of correlations among site ordination positions and measured variables. These results confirm that a variety of statistical approaches can clarify applications for restoration ecology following landslide and volcanic disturbances or agriculture and forestry anthropogenic disturbances in the lowland tropics. PMID:24505499

  2. 77 FR 61768 - Neurological Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-11

    ...Neurological Devices Panel of the Medical Devices Advisory Committee...multi-lumen device with two balloons mounted near the distal tip...inflation of the individual balloons. The device is placed in the...patients who have failed maximal medical management. Of note,...

  3. 77 FR 68788 - Neurological Devices Panel of the Medical Devices Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-16

    ...Neurological Devices Panel of the Medical Devices Advisory Committee...multilumen device with two balloons mounted near the distal tip...inflation of the individual balloons. The device is placed in the...patients who have failed maximal medical management. Of note,...

  4. 78. DETAIL OF COMMUNICATIONS PANEL ON LAUNCH ANALYST PANEL SHOWING ...

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

    78. DETAIL OF COMMUNICATIONS PANEL ON LAUNCH ANALYST PANEL SHOWING 20 CHANNEL-SELECTION SWITCHES, ROTARY DIAL, HEADSET, AND FOOT PEDAL - Vandenberg Air Force Base, Space Launch Complex 3, Launch Operations Building, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  5. Mount Shasta Wilderness study area, California

    SciTech Connect

    Christiansen, R.L.; Tuchek, E.T.

    1984-01-01

    The Mount Shasta Wilderness study area was surveyed in 1975. It lies wholly on the slopes and summit area of Mount Shasta and consists almost entirely of the products of geologically young volcanism. Small deposits of volcanic cinders and pumice are present. The volcanic system of Mount Shasta is judged to have probable resource potential for geothermal energy but that potential is least within the wilderness study area boundaries. Because any geothermal energy resource beneath the volcano would lie at considerable depths, exploration or development would be most likely at lower altitudes on the gentler slopes outside the study area.

  6. An Application of Panel Regression to Pseudo Panel Data

    Microsoft Academic Search

    Jeffrey E. Russell; W. Fraas

    This article illustrates how, in the absence of true panel data, multivariate regression analysis can be used in conjunction with a pseudo panel data set to identify variables that were related to the increase in the proportion of two-income spouses in the United States between 1940 and 2000. We present the procedures used to form the pseudo panel data set,

  7. Hexagon solar power panel

    Microsoft Academic Search

    I. Rubin

    1978-01-01

    A solar energy panel support is described upon which silicon cells are arrayed. The cells are wafer thin and of two geometrical types, both of the same area and electrical rating, namely hexagon cells and hourglass cells. The hourglass cells are composites of half hexagons. A near perfect nesting relationship of the cells achieves a high density packing whereby optimum

  8. AEROSPACE SAFETY ADVISORY PANEL

    E-print Network

    AEROSPACE SAFETY ADVISORY PANEL National Aeronautics and Space Administration Washington, DC 20546 VADM National Aeronautics and Space Administration Washington, DC 20546 Dear Mr. Bolden: Pursuant to Section 106(b) of the National Aeronautics and Space Administration Authorization Act of 2005 (P.L. 109

  9. 14 CFR 33.23 - Engine mounting attachments and structure.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2011-01-01 false Engine mounting attachments and structure. 33.23 Section...General § 33.23 Engine mounting attachments and structure. (a) The maximum...and ultimate loads for engine mounting attachments and related engine structure must...

  10. 14 CFR 33.23 - Engine mounting attachments and structure.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 false Engine mounting attachments and structure. 33.23 Section...General § 33.23 Engine mounting attachments and structure. (a) The maximum...and ultimate loads for engine mounting attachments and related engine structure must...

  11. LCD Panels: The Electronic Wonder.

    ERIC Educational Resources Information Center

    Anderson, Glenn

    1994-01-01

    Describes Liquid Crystal Display (LCD) panels and their use in the classroom. Topics discussed include active versus passive matrix panels; the number of pixels; projectors, including transmissive or reflective overhead projectors; costs; and vendors that supply LCDs. (LRW)

  12. Report of Industry Panel Group

    NASA Technical Reports Server (NTRS)

    Gallimore, Simon; Gier, Jochen; Heitland, Greg; Povinelli, Louis; Sharma, Om; VandeWall, Allen

    2006-01-01

    A final report is presented from the industry panel group. The contents include: 1) General comments; 2) Positive progress since Minnowbrook IV; 3) Industry panel outcome; 4) Prioritized turbine projects; 5) Prioritized compressor projects; and 6) Miscellaneous.

  13. Analysis of Wind Forces on Roof-Top Solar Panel

    NASA Astrophysics Data System (ADS)

    Panta, Yogendra; Kudav, Ganesh

    2011-03-01

    Structural loads on solar panels include forces due to high wind, gravity, thermal expansion, and earthquakes. International Building Code (IBC) and the American Society of Civil Engineers are two commonly used approaches in solar industries to address wind loads. Minimum Design Loads for Buildings and Other Structures (ASCE 7-02) can be used to calculate wind uplift loads on roof-mounted solar panels. The present study is primarily focused on 2D and 3D modeling with steady, and turbulent flow over an inclined solar panel on the flat based roof to predict the wind forces for designing wind management system. For the numerical simulation, 3-D incompressible flow with the standard k- ? was adopted and commercial CFD software ANSYS FLUENT was used. Results were then validated with wind tunnel experiments with a good agreement. Solar panels with various aspect ratios for various high wind speeds and angle of attacks were modeled and simulated in order to predict the wind loads in various scenarios. The present study concluded to reduce the strong wind uplift by designing a guide plate or a deflector before the panel. Acknowledgments to Northern States Metal Inc., OH (GK & YP) and School of Graduate Studies of YSU for RP & URC 2009-2010 (YP).

  14. Best foot forward to climb Mount Kilimanjaro.

    PubMed

    2015-04-01

    A NINE-STRONG team from Great Ormond Street Hospital, London, is preparing to climb Mount Kilimanjaro in Tanzania to raise money for Elephant ward, which treats children with leukaemia and other cancers. PMID:25858391

  15. Microgravity isolation mounts based upon Piezoelectric film

    NASA Technical Reports Server (NTRS)

    Vonflotow, Andreas

    1992-01-01

    The topics are presented in viewgraph form and include the following: a polyvinylidene fluoride (PVDF) actuator; a semi-active soft mount; a 3-axis experiment; low frequency disturbance attenuation; the control problem; and a 6-axis laboratory prototype.

  16. X-band slotted array test panel and test fixture

    NASA Technical Reports Server (NTRS)

    1979-01-01

    Data from the development of the X-band slotted array test band, X-band array test fixture, and the X/L-band test fixture for the Support Instrumentation Requirements program are documented. An X-band array was built and installed with an existing L-band module in such a way as to permit antenna pattern measurements in a series of nonplanar configurations that might simulate the thermal effects of nonuniform solar illumination on the array in a space environment. This was accomplished with eight X-band subpanels mounted adjacently on individually adjusted supports which were then co-mounted to a larger frame which served to mount and physically distort the existing L-band module. The L-band module is a heavy electrical breadboard array section that was fabricated to demonstrate the performance capabilities of a slotted waveguide array at L-band frequencies. Drawings, mechanical analysis, and descriptions of test configurations are presented.

  17. Motorized control for mirror mount apparatus

    DOEpatents

    Cutburth, Ronald W. (Tracy, CA)

    1989-01-01

    A motorized control and automatic braking system for adjusting mirror mount apparatus is disclosed. The motor control includes a planetary gear arrangement to provide improved pitch adjustment capability while permitting a small packaged design. The motor control for mirror mount adjustment is suitable for laser beam propagation applications. The brake is a system of constant contact, floating detents which engage the planetary gear at selected between-teeth increments to stop rotation instantaneously when the drive motor stops.

  18. An innovative deployable solar panel system for Cubesats

    NASA Astrophysics Data System (ADS)

    Santoni, Fabio; Piergentili, Fabrizio; Donati, Serena; Perelli, Massimo; Negri, Andrea; Marino, Michele

    2014-02-01

    One of the main Cubesat bus limitations is the available on-board power. The maximum power obtained using body mounted solar panels and advanced triple junction solar cells on a triple unit Cubesat is typically less than 10 W. The Cubesat performance and the mission scenario opened to these small satellite systems could be greatly enhanced by an increase of the available power. This paper describes the design and realization of a modular deployable solar panel system for Cubesats, consisting of a modular hinge and spring system that can be potentially used on-board single (1U), double(2U), triple (3U) and six units (6U) Cubesats. The size of each solar panels is the size of a lateral Cubesat surface. The system developed is the basis for a SADA (Solar Array Drive Assembly), in which a maneuvering capability is added to the deployed solar array in order to follow the apparent motion of the sun. The system design trade-off is discussed, comparing different deployment concepts and architectures, leading to the final selection for the modular design. A prototype of the system has been realized for a 3U Cubesat, consisting of two deployable solar panel systems, made of three solar panels each, for a total of six deployed solar panels. The deployment system is based on a plastic fiber wire and thermal cutters, guaranteeing a suitable level of reliability. A test-bed for the solar panel deployment testing has been developed, supporting the solar array during deployment reproducing the dynamical situation in orbit. The results of the deployment system testing are discussed, including the design and realization of the test-bed, the mechanical stress given to the solar cells by the deployment accelerations and the overall system performance. The maximum power delivered by the system is about 50.4 W BOL, greatly enhancing the present Cubesat solar array performance.

  19. Payload advisory panel recommendations

    NASA Technical Reports Server (NTRS)

    Moore, Berrien, III

    1991-01-01

    The Payload Advisory Panel proposes a restructured Earth Observing System (EOS) mission to address high-priority science and environmental policy issues in Earth System Science. These issues have been identified through studies conducted by the Intergovernmental Panel on Climate Change (IPCC), the United States Environmental Protection Agency (EPA), and the Committee on Earth and Environmental Sciences (CEES). The restructured EOS defers efforts to improve the understanding of the middle and upper stratosphere and solid earth geophysics. The strategy of the mission combines high priority new measurements with continuation of critical data sets begun by missions which precede EOS. Collaborative arrangements with international partners are an essential part of the program and additional arrangements are posed. The need for continuity in Earth observations and the urgency of environmental questions require launch of some EOS elements as soon as possible. They further require maintenance of the EOS objective of obtaining consistent 15-year measurement records.

  20. Medical Physics Panel Discussion

    NASA Astrophysics Data System (ADS)

    Guèye, Paul; Avery, Steven; Baird, Richard; Soares, Christopher; Amols, Howard; Tripuraneni, Prabhakar; Majewski, Stan; Weisenberger, Drew

    2006-03-01

    The panel discussion will explore opportunities and vistas in medical physics research and practice, medical imaging, teaching medical physics to undergraduates, and medical physics curricula as a recruiting tool for physics departments. Panel members consist of representatives from NSBP (Paul Guèye and Steven Avery), NIH/NIBIB (Richard Baird), NIST (Christopher Soares), AAPM (Howard Amols), ASTRO (Prabhakar Tripuraneni), and Jefferson Lab (Stan Majewski and Drew Weisenberger). Medical Physicists are part of Departments of Radiation Oncology at hospitals and medical centers. The field of medical physics includes radiation therapy physics, medical diagnostic and imaging physics, nuclear medicine physics, and medical radiation safety. It also ranges from basic researcher (at college institutions, industries, and laboratories) to applications in clinical environments.

  1. Clinical Space Medicine Panel

    NASA Technical Reports Server (NTRS)

    Baisden, Denise L.; Billica, Roger (Technical Monitor)

    2000-01-01

    The practice of space medicine is diverse. It includes routine preventive medical care of astronauts and pilots, the development of inflight medical capability and training of flight crews as well as the preflight, inflight, and postflight medical assessment and monitoring. The Johnson Space Center Medical Operations Branch is a leader in the practice of space medicine. The papers presented in this panel will demonstrate some of the unique aspects of space medicine.

  2. Analysis and test of superplastically formed titanium hat-stiffened panels under compression

    NASA Technical Reports Server (NTRS)

    Davis, Randall C.; Royster, Dick M.; Bales, Thomas T.

    1987-01-01

    Four hat-stiffened titanium panels with two different stiffener configurations were fabricated by superplastic forming/weld brazing and tested under a moderately heavy compressive load. The panels had the same overall dimensions but differed in the shape of the hat-stiffener webs; three panels had stiffeners with flat webs and the other panel had stiffeners with beaded webs. Analysis indicated that the local buckling strain of the flat stiffener web was considerably lower than the general panel buckling strain or cap buckling strain. The analysis also showed that beading the webs of the hat stiffeners removed them as the critical element for local buckling and improved the buckling strain of the panels. The analytical extensional stiffness and failure loads compared very well with experimental results.

  3. Development of Quiet Honeycomb Panels

    NASA Technical Reports Server (NTRS)

    Palumbo, Daniel L.; Klos, Jacob

    2009-01-01

    Sandwich honeycomb composite panels are lightweight and strong, and, therefore, provide a reasonable alternative to the aluminum ring framelstringer architecture currently used for most aircraft airframes. The drawback to honeycomb panels is that they radiate noise into the aircraft cabin very efficiently provoking the need for additional sound treatment which adds weight and reduces the material's cost advantage. A series of honeycomb panels were made which incorporated different design strategies aimed at reducing the honeycomb panels' radiation efficiency while at the same time maintaining its strength. The majority of the desi gns were centered around the concept of creatin g areas of reduced stiffness in the panel by adding voids and recesses to the core. The effort culminated with a reinforced./recessed panel which had 6 dB higher transmission loss than the baseline solid core panel while maintaining comparable strength.

  4. Aerospace Safety Advisory Panel

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This Annual Report of the Aerospace Safety Advisory Panel (ASAP) presents results of activities during calendar year 2001. The year was marked by significant achievements in the Space Shuttle and International Space Station (ISS) programs and encouraging accomplishments by the Aerospace Technology Enterprise. Unfortunately, there were also disquieting mishaps with the X-43, a LearJet, and a wind tunnel. Each mishap was analyzed in an orderly process to ascertain causes and derive lessons learned. Both these accomplishments and the responses to the mishaps led the Panel to conclude that safety and risk management is currently being well served within NASA. NASA's operations evidence high levels of safety consciousness and sincere efforts to place safety foremost. Nevertheless, the Panel's safety concerns have never been greater. This dichotomy has arisen because the focus of most NASA programs has been directed toward program survival rather than effective life cycle planning. Last year's Annual Report focused on the need for NASA to adopt a realistically long planning horizon for the aging Space Shuttle so that safety would not erode. NASA's response to the report concurred with this finding. Nevertheless, there has been a greater emphasis on current operations to the apparent detriment of long-term planning. Budget cutbacks and shifts in priorities have severely limited the resources available to the Space Shuttle and ISS for application to risk-reduction and life-extension efforts. As a result, funds originally intended for long-term safety-related activities have been used for operations. Thus, while safety continues to be well served at present, the basis for future safety has eroded. Section II of this report develops this theme in more detail and presents several important, overarching findings and recommendations that apply to many if not all of NASA's programs. Section III of the report presents other significant findings, recommendations and supporting material applicable to specific program areas. Appendix A presents a list of Panel members. Appendix B contains the reaction of the ASAP to NASA's response to the calendar year 2000 findings and recommendations. In accordance with a practice started last year, this Appendix includes brief narratives as well as classifications of the responses as 'open,' 'closed,' or 'continuing.' Appendix C details the Panel's activities during the reporting period.

  5. Motion control of the satellite mounted robot arm which assures satellite attitude stability

    NASA Astrophysics Data System (ADS)

    Mitsushige, Oda

    When a robot arm is mounted on a satellite to perform some tasks, the satellite's attitude must be stabilized to retain the communication link and to generate electrical power from solar panels. It is not realistic to control the total system as one dynamic system, since the number of degrees of freedom becomes too large to be handled by state-of-the-art satellite mounted computers. This paper proposes a coordinated control between the satellite's attitude control system and the robot-arm control system. The robot-arm control system estimates the angular momentum of the planned robot-arm's motion. The satellite's attitude control system will compensate for the reaction by using feed-forward control. The robot-arm controller also manages the motion plan of the robot arm in order not to disturb the satellite's attitude stability.

  6. Ball mounting fixture for a roundness gage

    DOEpatents

    Gauler, A.L.; Pasieka, D.F.

    1983-11-15

    A ball mounting fixture for a roundness gage is disclosed. The fixture includes a pair of chuck assemblies oriented substantially transversely with respect to one another and mounted on a common base. Each chuck assembly preferably includes a rotary stage and a wobble plate affixed thereto. A ball chuck affixed to each wobble plate is operable to selectively support a ball to be measured for roundness, with the wobble plate permitting the ball chuck to be tilted to center the ball on the axis of rotation of the rotary stage. In a preferred embodiment, each chuck assembly includes a vacuum chuck operable to selectively support the ball to be measured for roundness. The mounting fixture enables a series of roundness measurements to be taken with a conventional rotating gagehead roundness instrument, which measurements can be utilized to determine the sphericity of the ball. 6 figs.

  7. Mounting system for optical frequency reference cavities

    NASA Technical Reports Server (NTRS)

    Notcutt, Mark (Inventor); Hall, John L. (Inventor); Ma, Long-Sheng (Inventor)

    2008-01-01

    A technique for reducing the vibration sensitivity of laser-stabilizing optical reference cavities is based upon an improved design and mounting method for the cavity, wherein the cavity is mounted vertically. It is suspended at one plane, around the spacer cylinder, equidistant from the mirror ends of the cavity. The suspension element is a collar of an extremely low thermal expansion coefficient material, which surrounds the spacer cylinder and contacts it uniformly. Once the collar has been properly located, it is cemented in place so that the spacer cylinder is uniformly supported and does not have to be squeezed at all. The collar also includes a number of cavities partially bored into its lower flat surface, around the axial bore. These cavities are support points, into which mounting base pins will be inserted. Hence the collar is supported at a minimum of three points.

  8. Experimental investigation of orthotropic panel flutter at arbitrary yaw angles, and comparison with theory

    NASA Technical Reports Server (NTRS)

    Shyprykevich, P.

    1973-01-01

    Flutter characteristics for yaw angles between 15 deg and 90 deg were determined experimentally for two types of corrugation-stiffened panels: those with weak twisting stiffness and those with strong twisting stiffness. By mounting the panels on a remotely controlled turntable, good definition of the flutter boundaries was obtained by rotating the panels into and out of flutter. Flutter tests were conducted at M = 2 and M = 1.6. Before testing, vibration tests and analyses were also performed. The experimental flutter data is compared with flutter theory for orthotropic panels utilizing quasi-steady aerodynamics. Five different corrugated panels were tested consisting of one single skin panel having a length-to-width ratio of 5 on clamped supports and four different square double skin panels on discrete flexible supports. The investigation indicated that flutter speed for corrugated panels is highly dependent on yaw angle. Reasonable flutter correlation between analysis and test was obtained for moderate yaw angles, but extreme sensitivity to structural parameters made the correlation at large yaw angles uncertain.

  9. Space deployable domed solar concentrator with foldable panels and hinge therefor

    NASA Technical Reports Server (NTRS)

    Grayson, Fred G. (Inventor); Miller, Warren H. (Inventor); Sturgis, James D. (Inventor)

    1989-01-01

    A space deployable solar energy concentrator is formed of a dome-shaped arrangement of compactly stowable flat panel segments mounted on a collapsible, space-deployable support structure of interconnected linear components. The support structure is comprised of a plurality of tensioned, curvilinear edge strips which extend in a radial direction from a prescribed vertex of a surrounding umbrella-like framework of radially extending rib members. Between a respective pair of radially-extending, curvilinear edge strips an individual wedge-shaped panel section is formed of a plurality of multi-segment lens panel strips each of which is supported in tension between the pair of edge strips by a pair of circumferentially extending catenary cord members connected to a pair of ribs of the surrounding umbrella-like framework. A respective lens panel strip is comprised of a plurality of flat, generally rectangular-shaped, energy-directing panels arranged side-by-side in the circumferential direction of the dome. Adjacent panels are interconnected by flexible U-shaped hinges which overlap opposing edges of adjacent panels and engage respective cylindrically-shaped, load distribution bars that slide within the flexible hinges. Because each U-shaped hinge is flexible, it is permitted to shift in the circumferential direction of the panel section to facilitate stowage and deployment of the dome.

  10. Landsat observations of Mount St. Helens

    NASA Technical Reports Server (NTRS)

    Bohn, C. G.; Bly, B. G.

    1981-01-01

    The eruption of Mount St. Helens on May 18, 1980, and subsequent destruction of approximately 593 square kilometers (229 square miles) of vegetation, clearly provided a unique opportunity for earth-oriented satellite remote sensing systems. Landsat, a relatively high resolution Multispectral Scanner (MSS) system, imaged Mount St. Helens both before and after its major eruption. Digital data have been used to create a damage assessment map and a change detection image. Several classes of timber damage and land cover modification have been developed. Acreages for each class have been tabulated.

  11. Mount St. Helens: Before and After

    NSDL National Science Digital Library

    When Mount St. Helens erupted on May 18, 1980, the top 400 meters (1,300 feet) of the volcano disappeared in a blast that covered more than 390 square kilometers (150 square miles) and sent thousands of tons of ash into the upper atmosphere. This collection of still images and video depict before-and-after scenes of Mount St. Helens and its surroundings, allowing viewers to witness the results of the eruption and revealing the extent of environmental recovery 20 years later. A background essay and list of discussion questions are also provided.

  12. Reports from Science Mount St. Helens

    NASA Technical Reports Server (NTRS)

    Pollack, James B.

    1981-01-01

    The following reports describe extensive measurements of the properties of the gases and aerosols (particles) in the volcanic clouds produced by the eruptions of Mount St. Helens from March through August 1980. Volcanic material was first injected into the atmosphere on 27 March 1980. This material, as well as that introduced by subsequent eruptions during the next 2 months, was confined to the troposphere. On 18 May the first of several major explosions occurred in which some of the volcanic cloud penetrated well into the stratosphere. The nature of the volcanic activity at Mount St. Helens from the end of March through June was described.

  13. Trying to Breathe on Mount Everest

    NSDL National Science Digital Library

    At high altitudes, Earth's atmosphere is much thinner than it is at sea level. Mountain climbers trying to reach the highest peaks have to overcome a lack of oxygen. Mount Everest, the highest point in the world, seems to be at the limit of human capabilities. This video segment, adapted from a NOVA television broadcast, describes the symptoms of mountain sickness (oxygen deprivation) and shows how climbers ascending Mount Everest combat mountain sickness. The segment is three minutes thirty-four seconds in length.

  14. Taking the Heat: Handling the Shuttle's RCC Wing Panels

    NASA Technical Reports Server (NTRS)

    Stegles, Katrine S.

    2008-01-01

    Innovative inspection technology was developed to inspect the Reinforced Carbon-Carbon (RCC) wing panels on the vehicle, thus eliminating need to remove/reinstall all 44 RCC panels for inspections per processing flow. Manually holding inspection tools up to the RCC panels was a 3-person job with high risk of personnel injury and flight hardware damage. To further enhance ergonomics, reduce personnel/flight hardware risks, and improve repeatability, an inspection cart and fixture were constructed to physically secure the instruments for Inspectors during 652 inspection points per flow. The electric lift used to handle RCCs was also utilized to raise the heavy, bulky inspection equipment up to the wing leading edge.

  15. Microsphere Insulation Panels

    NASA Technical Reports Server (NTRS)

    Mohling, R.; Allen, M.; Baumgartner, R.

    2006-01-01

    Microsphere insulation panels (MIPs) have been developed as lightweight, longlasting replacements for the foam and vacuum-jacketed systems heretofore used for thermally insulating cryogenic vessels and transfer ducts. The microsphere core material of a typical MIP consists of hollow glass bubbles, which have a combination of advantageous mechanical, chemical, and thermal-insulation properties heretofore available only separately in different materials. In particular, a core filling of glass microspheres has high crush strength and low density, is noncombustible, and performs well in soft vacuum.

  16. Aerospace Safety Advisory Panel

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This report presents the results of the Aerospace Safety Advisory Panel (ASAP) activities during 2002. The format of the report has been modified to capture a long-term perspective. Section II is new and highlights the Panel's view of NASA's safety progress during the year. Section III contains the pivotal safety issues facing NASA in the coming year. Section IV includes the program area findings and recommendations. The Panel has been asked by the Administrator to perform several special studies this year, and the resulting white papers appear in Appendix C. The year has been filled with significant achievements for NASA in both successful Space Shuttle operations and International Space Station (ISS) construction. Throughout the year, safety has been first and foremost in spite of many changes throughout the Agency. The relocation of the Orbiter Major Modifications (OMMs) from California to Kennedy Space Center (KSC) appears very successful. The transition of responsibilities for program management of the Space Shuttle and ISS programs from Johnson Space Center (JSC) to NASA Headquarters went smoothly. The decision to extend the life of the Space Shuttle as the primary NASA vehicle for access to space is viewed by the Panel as a prudent one. With the appropriate investments in safety improvements, in maintenance, in preserving appropriate inventories of spare parts, and in infrastructure, the Space Shuttle can provide safe and reliable support for the ISS for the foreseeable future. Indications of an aging Space Shuttle fleet occurred on more than one occasion this year. Several flaws went undetected in the early prelaunch tests and inspections. In all but one case, the problems were found prior to launch. These incidents were all handled properly and with safety as the guiding principle. Indeed, launches were postponed until the problems were fully understood and mitigating action could be taken. These incidents do, however, indicate the need to analyze the Space Shuttle certification criteria closely. Based on this analysis, NASA can determine the need to receritfy the vehicles and to incorporate more stringent inspections throughout the process to minimize launch schedule impact. A highly skilled and experience workforce will be increasingly important for safe and reliable operations as the Space Shuttle vehicles and infrastructure continue to age.

  17. Composite Sandwich Panels

    NSDL National Science Digital Library

    Finn, Brian

    This module, created by Brian D. Finn of the University of Washington, "investigates the fundamental aspects of designing composite sandwich panels." These boards are commonly used to create surfboards, wake boards, and corrugated cardboard. They are also heavily implemented in the aerospace industry; this includes items such as wing flaps, aircraft floors and overhead storage bins. The module features an abstract, objective, curriculum overview, procedures, mathematical calculations and references. In the end, students will learn to build, test and analyze the strength of these composite materials.

  18. Heat Pipe Thermal Conditioning Panel

    NASA Technical Reports Server (NTRS)

    Saaski, E. W.

    1973-01-01

    The technology involved in designing and fabricating a heat pipe thermal conditioning panel to satisfy a broad range of thermal control system requirements on NASA spacecraft is discussed. The design specifications were developed for a 30 by 30 inch heat pipe panel. The fundamental constraint was a maximum of 15 gradient from source to sink at 300 watts input and a flux density of 2 watts per square inch. The results of the performance tests conducted on the panel are analyzed.

  19. Exploring QCD with Heavy Ion Collisions

    E-print Network

    Mark D. Baker

    2003-09-02

    After decades of painstaking research, the field of heavy ion physics has reached an exciting new era. Evidence is mounting that we can create a high temperature, high density, strongly interacting ``bulk matter'' state in the laboratory -- perhaps even a quark-gluon plasma. This strongly interacting matter is likely to provide qualitative new information about the fundamental strong interaction, described by Quantum Chromodynamics (QCD). These lectures provide a summary of experimental heavy ion research, with particular emphasis on recent results from RHIC (Relativistic Heavy Ion Collider) at Brookhaven National Laboratory. In addition, we will discuss what has been learned so far and the outstanding puzzles.

  20. Microgap flat panel display

    DOEpatents

    Wuest, C.R.

    1998-12-08

    A microgap flat panel display is disclosed which includes a thin gas-filled display tube that utilizes switched X-Y ``pixel`` strips to trigger electron avalanches and activate a phosphor at a given location on a display screen. The panel utilizes the principal of electron multiplication in a gas subjected to a high electric field to provide sufficient electron current to activate standard luminescent phosphors located on an anode. The X-Y conductive strips of a few micron widths may for example, be deposited on opposite sides of a thin insulating substrate, or on one side of the adjacent substrates and function as a cathode. The X-Y strips are separated from the anode by a gap filled with a suitable gas. Electrical bias is selectively switched onto X and Y strips to activate a ``pixel`` in the region where these strips overlap. A small amount of a long-lived radioisotope is used to initiate an electron avalanche in the overlap region when bias is applied. The avalanche travels through the gas filled gap and activates a luminescent phosphor of a selected color. The bias is adjusted to give a proportional electron multiplication to control brightness for given pixel. 6 figs.

  1. Electrode mounting in DC arc furnace vessels

    Microsoft Academic Search

    1986-01-01

    A vessel is described for a dc arc furnace having a bottom with a refractory lining, there being a cooled electric current feeding structure arranged outside of the vessel underneath the bottom, and further including a plurality of electrode pins, the improvement comprising a separate mounting facility for each pin, including in each instance: a bore in the lining; an

  2. Electron microscopy of whole mount metaphase chromosomes

    Microsoft Academic Search

    J. B. Rattner; A. Branch; B. A. Hamkalo

    1975-01-01

    Whole mount metaphase chromosomes, from cultured L cells, have been centrifuged onto grids and examined by electron microscopy. Compact and dispersed chromosome forms provide extensive ultrastructural information. Condensed chromosome arms appear as packed fibers with centromeric heterochromatin identifiable because it stains more intensely than the rest of the chromosome. Kinetochores are readily visible in these preparations. Under appropriate isolation conditions,

  3. Shock absorbing mount for electrical components

    NASA Technical Reports Server (NTRS)

    Dillon, R. F., Jr.; Mayne, R. C. (inventors)

    1975-01-01

    A shock mount for installing electrical components on circuit boards is described. The shock absorber is made of viscoelastic material which interconnects the electrical components. With this system, shocks imposed on one component of the circuit are not transmitted to other components. A diagram of a typical circuit is provided.

  4. High Performance Aircraft Helmet Mounted Display Research

    NASA Technical Reports Server (NTRS)

    1991-01-01

    Lockheed engineer,Joe Clark,is sitting in the LaRC DMS wearing a binocular wide-field-of view Helmet Mounted Display(HMD) which utilized 6 DOF head tracking for line-of sight information and SGI display drivers to display new display concepts for air combat to the pilot of high performance (F-18 HARV) aircraft.

  5. Computer Graphics1 David M. Mount

    E-print Network

    Jacobs, David

    CMSC 427 Computer Graphics1 David M. Mount Department of Computer Science University of Maryland. Computer Graphics: Computer graphics is concerned with producing images and animations (or sequences of im that is in great demand because of the nearly limitless variety of applications. The field of computer graphics has

  6. TAIL-MOUNTED RADIO TRANSMITTERS FOR WATERFOWL

    Microsoft Academic Search

    JEAN-FRANCOIS GIROUX; DAVID V. BELL; STEVE PERCIVAL; RON W. SUMMERS

    We successfully tested tail-mounted radio transmitters on Pink-footed Geese (Anser brachyrhynchus), Barnacle Geese (Branta leucopsis), Brant (Branta bernicla) and Eur- asian Wigeon (Anas penelope). The range of detection of the transmitters was approximately 1 km and some birds were tracked for up to 4 mo. Movements and activity of the birds were not affected by the packages. We conclude that

  7. Computational Geometry1 David M. Mount

    E-print Network

    Katz, Jonathan

    CMSC 754 Computational Geometry1 David M. Mount Department of Computer Science University, Computational Geometry, at the University of Maryland. Permission to use, copy, modify, and distribute appear in all copies. Lecture Notes 1 CMSC 754 #12;Lecture 1: Introduction What is Computational Geometry

  8. Potential climate impact of Mount Pinatubo eruption

    Microsoft Academic Search

    James Hansen; Andrew Lacis; Reto Ruedy; Makiko Sato

    1992-01-01

    We use the GISS global climate model to make a preliminary estimate of Mount Pinatubo's climate impact. Assuming the aerosol optical depth is nearly twice as great as for the 1982 El Chichon eruption, the model forecasts a dramatic but temporary break in recent global warming trends. The simulations indicate that Pinatubo occurred too late in the year to prevent

  9. 137. POWER PANEL A (208 VOLTS) AND POWER PANEL B ...

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

    137. POWER PANEL A (208 VOLTS) AND POWER PANEL B (480 VOLTS) ON EAST WALL OF TRANSFORMER ROOM (212), LSB (BLDG. 751) - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 East, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  10. Panel Organization 1. Panel on Structural Geology & Geoengineering

    E-print Network

    & Systems Chair: Dr. Dennis L. Price Staff: Dr. Sherwood C. Chu Members: Dr. Garry D. Brewer Dr. D. Warner North Dr. Ellis D. Verink, Jr. 5. Panel on the Environment & Public Health Chair: Dr. Garry D. Brewer. Garry D. Brewer Dr. Patrick A. Domenico Dr. Dennis L. Price Dr. Ellis D. Verink, Jr. 7. Panel on Quality

  11. Systems and methods for mirror mounting with minimized distortion

    NASA Technical Reports Server (NTRS)

    Antonille, Scott R. (Inventor); Wallace, Thomas E. (Inventor); Content, David A. (Inventor); Wake, Shane W. (Inventor)

    2012-01-01

    A method for mounting a mirror for use in a telescope includes attaching the mirror to a plurality of adjustable mounts; determining a distortion in the mirror caused by the plurality adjustable mounts, and, if the distortion is determined to be above a predetermined level: adjusting one or more of the adjustable mounts; and determining the distortion in the mirror caused by the adjustable mounts; and in the event the determined distortion is determined to be at or below the predetermined level, rigidizing the adjustable mounts.

  12. An Integrated Cyber Panel System

    Microsoft Academic Search

    Laura S. Tinnel; O. Sami Saydjari; Joshua W. Haines

    2003-01-01

    The DARPA Cyber Panel program has funded research in defending mission-critical information systems from strategic coordinated attacks. This research spans many areas including novel sensors, alert correlation and reduction, visual correlation, mission impact assessment, and response. This paper describes the integration of Cyber Panel technologies from the different areas into an advanced cyber defense system and the demonstration of that

  13. PV panel modelling using Simscape

    Microsoft Academic Search

    N. C. Sahoo; I. Elamvazuthi; Nursyarizal Mohd Nor; P. Sebastian; B. P. Lim

    2011-01-01

    This paper discusses the photovoltaic panel model realization using software package known as Simscape, a simulation platform for the PV cell and panel. The output current and power characteristics of PV model are simulated using the proposed software based on sunlight irradiance and cell temperature characteristics. The simulation and analysis of the dynamics of PV power system is made easy

  14. Plane and parabolic solar panels

    E-print Network

    Sales, J H O

    2009-01-01

    We present a plane and parabolic collector that absorbs radiant energy and transforms it in heat. Therefore we have a panel to heat water. We study how to increment this capture of solar beams onto the panel in order to increase its efficiency in heating water.

  15. Plane and parabolic solar panels

    E-print Network

    J. H. O. Sales; A. T. Suzuki

    2009-05-14

    We present a plane and parabolic collector that absorbs radiant energy and transforms it in heat. Therefore we have a panel to heat water. We study how to increment this capture of solar beams onto the panel in order to increase its efficiency in heating water.

  16. ALDS 1980 panel review

    SciTech Connect

    Hall, D. L. [ed.] [ed.

    1981-11-01

    The overall goal of PNL (Pacific Northwest Laboratory) Applied Mathematical Sciences Research is development of a DOE (Department of Energy) capability for Analysis of Large Data Sets (ALDS) and transfer of this capability to other DOE laboratories and contractors. This capability is needed to satisfy DOE's increasing requirements for handling and analyzing large volumes of diverse energy and environmental data. The integrated statistics and computer science research includes the development of improved methodologies in data definition, data management, data analysis, and visual display. The purpose of this document is three-fold. First, the document is the permanent record of the ALDS 1979 panel review. Second, the document provides the PNL staff with a benchmark of where we were at the end of the second year of ALDS. Third, the document is available to laboratories, universities, and DOE headquarters as detailed description of the ALDS project, as well as an example of the new direction of AMS-funded research.

  17. A comparison between ship-mounted and cage-mounted passive heave compensation systems

    Microsoft Academic Search

    F. R. Driscoll; M. Nahon; R. G. Lueck

    1998-01-01

    A finite-element lumped-mass model was used to investigate the performance of ship-mounted and cage mounted passive heave compensation systems for the ROPOS deep sea ROV system. Numerical simulations were done for operating depths ranging from 400 to 5000 m and compensator travel ranging from 2 to 5 m. The compensator lowered the natural frequency of the system. The RMS cage

  18. Aerospace Safety Advisory Panel

    NASA Technical Reports Server (NTRS)

    2001-01-01

    This annual report is based on the activities of the Aerospace Safety Advisory Panel in calendar year 2000. During this year, the construction of the International Space Station (ISS) moved into high gear. The launch of the Russian Service Module was followed by three Space Shuttle construction and logistics flights and the deployment of the Expedition One crew. Continuous habitation of the ISS has begun. To date, both the ISS and Space Shuttle programs have met or exceeded most of their flight objectives. In spite of the intensity of these efforts, it is clear that safety was always placed ahead of cost and schedule. This safety consciousness permitted the Panel to devote more of its efforts to examining the long-term picture. With ISS construction accelerating, demands on the Space Shuttle will increase. While Russian Soyuz and Progress spacecraft will make some flights, the Space Shuttle remains the primary vehicle to sustain the ISS and all other U.S. activities that require humans in space. Development of a next generation, human-rated vehicle has slowed due to a variety of technological problems and the absence of an approach that can accomplish the task significantly better than the Space Shuttle. Moreover, even if a viable design were currently available, the realities of funding and development cycles suggest that it would take many years to bring it to fruition. Thus, it is inescapable that for the foreseeable future the Space Shuttle will be the only human-rated vehicle available to the U.S. space program for support of the ISS and other missions requiring humans. Use of the Space Shuttle will extend well beyond current planning, and is likely to continue for the life of the ISS.

  19. Bonded Bracket Assmebly for Frameless Solar Panels

    SciTech Connect

    Murray, Todd

    2013-01-30

    In February 2011 the US Department of Energy announced their new Sunshot Initiative. The Sunshot goal is to reduce the total cost of solar energy systems by about 75 percent before the end of the decade. The DOE estimated that a total installed cost of $1 per watt for photovoltaic systems would be equivalent to 6���¢/kilowatt hour (kWh) for energy available from the grid. The DOE also estimated that to meet the $1 per watt goal, PV module costs would need to be reduced to $.50 per watt, balance of systems costs would need to be reduced to $.40 per watt, and power electronic costs would need to reach $.10 per watt. To address the BOS balance of systems cost component of the $1 per watt goal, the DOE announced a funding opportunity called (BOS-X) Extreme Balance of System Hardware Cost Reductions. The DOE identified eight areas within the total BOS costs: 1) installation labor, 2) installation materials, 3) installation overhead and profit, 4) tracker, 5) permitting and commissioning, 6) site preparation, 7) land acquisition, 8) sales tax. The BOS-X funding announcement requested applications in four specific topics: Topic 1: Transformational Building Integrated Photovoltaic (BIPV) Modules Topic 2: Roof and Ground Mount Innovations Topic 3: Transformational Photovoltaic System Designs Topic 4: Development of New Wind Load Codes for PV Systems The application submitted by ARaymond Tinnerman reflected the requirements listed in Topic #2, Roof and Ground Mount Innovations. The goal of topic #2 was to develop technologies that would result in the extreme reduction of material and labor costs associated with applications that require physical connections and attachments to roof and ground mount structures. The topics researched in this project included component cost reduction, labor reduction, weight reduction, wiring innovations, and alternative material utilization. The project objectives included: 1) The development of an innovative quick snap bracket assembly that would be bonded to frameless PV modules for commercial rooftop installations. 2) The development of a composite pultruded rail to replace traditional racking materials. 3) In partnership with a roofing company, pilot the certification of a commercial roof to be solar panel compliant, eliminating the need for structural analysis and government oversight resulting in significantly decreased permitting costs. 4) Reduce the sum of all cost impacts in topic #2 from a baseline total of $2.05/watt to $.34/watt.

  20. 7 CFR 2902.19 - Composite panels.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Composite panels. 2902.19 Section 2902...PROCUREMENT Designated Items § 2902.19 Composite panels. (a) Definitions. (1) Plastic lumber composite panels. Engineered products...

  1. 30 CFR 77.310 - Control panels.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...SURFACE WORK AREAS OF UNDERGROUND COAL MINES Thermal Dryers § 77.310 Control panels. (a) All thermal dryer system control panels constructed...posted on or near the control panel of each thermal drying system. (c) Each...

  2. Lightweight, self-evacuated insulation panels

    NASA Technical Reports Server (NTRS)

    Dengler, R. P.; Niendorf, L. R.; Nies, G. E.; Perkins, P. J., Jr.

    1970-01-01

    Multilayer insulation of prefabricated panels is developed for cryogenic storage tanks. System utilizes panels of aluminized Mylar separated by sheets of low conductivity polyurethane foam. Panels are self-evacuated by cryopumping of gaseous carbon dioxide at time of use.

  3. Shaft mount for data coupler system

    NASA Technical Reports Server (NTRS)

    Elliott, James R., Jr. (inventor); Lord, Mark T. (inventor)

    1993-01-01

    A device for mounting a data transmission apparatus to a rotating, tapered, and instrumented shaft is provided. This device permits attachment without interfering with shaft rotation or the accuracy of data output, and prevents both radial and axial slippage of the data transmission apparatus. The mounting device consists of a sleeve assembly which is attached to the shaft by means of clamps that are situated at some distance removed from the instrumented area of the shaft. The data transmission device is secured to the sleeve such that the entire assembly rotates with the shaft. Shim adjustments between sleeve sections assure that a minimum compressive load is transferred to the instrumented area of the shaft and a rubber lining is affixed to a large portion of the interior surface of the sleeve to absorb vibration.

  4. Making Sense of Mount St. Helens

    NSDL National Science Digital Library

    Steve Nash (University of Richmond; )

    2010-09-01

    Three decades out, the pulse of research quickens at Mount St. Helens (MSH) National Volcanic Monument. The eruption in 1980 resulted in "a grand experiment that you could never have gotten anybody to fund," says Forest Service ecologist Charles Crisafulli. Unlike most misbehaving volcanoes, this one provided an accessible laboratory right along the Interstate 5 corridor, with the research infrastructure of major universities nearby. Mount St. Helens has helped revise one of ecology's oldest preoccupations: trying to recapitulate the story of how communities of plants and animals assemble themselves over timeâ??how one suite of species succeeds another. Statistical analyses find that environmental factors such as soils, temperatures, moisture, and elevation do not predict succession, especially in the early years after a disturbance. Instead, chance dominates: which seeds might be blown or carried in, what species are nearby or distant, and the "biological legacy" factors that survived the disturbance.

  5. Adjustable link for kinematic mounting systems

    DOEpatents

    Hale, L.C.

    1997-07-01

    An adjustable link for kinematic mounting systems is disclosed. The adjustable link is a low-cost, passive device that provides backlash-free adjustment along its single constraint direction and flexural freedom in all other directions. The adjustable link comprises two spheres, two sockets in which the spheres are adjustable retain, and a connection link threadly connected at each end to the spheres, to provide a single direction of restraint and to adjust the length or distance between the sockets. Six such adjustable links provide for six degrees of freedom for mounting an instrument on a support. The adjustable link has applications in any machine or instrument requiring precision adjustment in six degrees of freedom, isolation from deformations of the supporting platform, and/or additional structural damping. The damping is accomplished by using a hollow connection link that contains an inner rod and a viscoelastic separation layer between the two. 3 figs.

  6. Digital Encyclopedia: George Washington's Mount Vernon

    NSDL National Science Digital Library

    What was George Washington's life like at Mount Vernon? This frequent question is answered in fine form by this Digital Encyclopedia, compiled by a variety of scholars in collaboration with the Mount Vernon Estate. It is particularly appropriate that there is such a copious compendium of facts on the goings-on at Mt. Vernon, as Washington was enamored of encyclopedias during his life. Drawing on a range of primary sources, this project brings together hundreds of entries divided into over a dozen topics, including Military, Slavery, Food and Drink, and Animals. The Personal area is quite compelling, as it includes entries on Barbados, smallpox and, of course, the celebrated myths surrounding Washington's false teeth.

  7. Holographic Helmet-Mounted Display Unit

    NASA Technical Reports Server (NTRS)

    Burley, James R., II; Larussa, Joseph A.

    1995-01-01

    Helmet-mounted display unit designed for use in testing innovative concepts for display of information to aircraft pilots. Operates in conjunction with computers generating graphical displays. Includes two ocular subunits containing miniature cathoderay tubes and optics providing 40 degrees vertical, 50 degrees horizontal field of view to each eye, with or without stereopsis. In future color application, each ocular subunit includes trichromatic holographic combiner tuned to red, green, and blue wavelengths of phosphors used in development of miniature color display devices.

  8. Collecting, Cleaning, Mounting, and Photographing Diatoms

    Microsoft Academic Search

    Stephen S. Nagy

    \\u000a This chapter describes techniques used by diatomists to clean and mount diatoms successfully. The techniques involve the use\\u000a of extremely hazardous chemicals that are a serious threat to one’s health and physical safety, including strong mineral acids\\u000a that can cause severe skin burns or blindness after brief contact with the skin or eyes; sodium hydroxide, a strong base which\\u000a can

  9. Cantilever mounted resilient pad gas bearing

    NASA Technical Reports Server (NTRS)

    Etsion, I. (inventor)

    1978-01-01

    A gas-lubricated bearing is described, employing at least one pad mounted on a rectangular cantilever beam to produce a lubricating wedge between the face of the pad and a moving surface. The load-carrying and stiffness characteristics of the pad are related to the dimensions and modulus of elasticity of the beam. The bearing is applicable to a wide variety of types of hydrodynamic bearings.

  10. Nd:YAG breech mounted laser igniter

    Microsoft Academic Search

    Christopher R. Hardy; Michael J. Myers; John D. Myers; Robert L. Gadson; Joseph Leone; Josiah W. Fay; Kevin Boyd

    2005-01-01

    Nd:YAG lasers have been successfully used to demonstrate laser ignition of howitzer propellant charges including bag, stick, and the Modular Artillery Charge System (MACS). Breech Mount Laser Ignition Systems (BMLIS) have been designed, installed and tested on many artillery systems, including the US Army's M109A6 Paladin, M198, M777 Light Weight, Crusader, and Non-Line-of-Sight Cannon (NLOS-C). The NLOS-C incorporates advanced weapon

  11. Conceptual design for PSP mounting bracket

    SciTech Connect

    Ransom, G.; Stein, R.

    1991-08-16

    Protective structural packages (PSP's or overpacks) used to ship 2{1/2}-ton UF product cylinders are bolted to truck trailers. All bolts penetrate two longitudinal rows of wooden planks. Removal and replacement is required at various intervals for maintenance and routine testing. A conceptual design is presented for mounting brackets which would securely attach PSP's to trailer frames, reduce removal and replacement time, and minimize risk of personnel injury. 1 ref., 2 figs.

  12. 4. Panama Mount. Note concrete ring and metal rail. Note ...

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

    4. Panama Mount. Note concrete ring and metal rail. Note cliff erosion under foundation at left center. Looking 297° W. - Fort Funston, Panama Mounts for 155mm Guns, Skyline Boulevard & Great Highway, San Francisco, San Francisco County, CA

  13. 3. Panama Mount in rear. Foundation in foreground is base ...

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

    3. Panama Mount in rear. Foundation in foreground is base for ammunition depot. Looking 328° NNW. - Fort Funston, Panama Mounts for 155mm Guns, Skyline Boulevard & Great Highway, San Francisco, San Francisco County, CA

  14. 49 CFR 178.255-11 - Tank mountings.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 2010-10-01 2010-10-01 false Tank mountings. 178.255-11 Section 178...FOR PACKAGINGS Specifications for Portable Tanks § 178.255-11 Tank mountings. (a) Tanks shall be designed and fabricated with...

  15. THE UNIVERSITY OF ARIZONA Mount Graham International Observatory

    E-print Network

    Ziurys, Lucy M.

    THE UNIVERSITY OF ARIZONA Mount Graham International Observatory Emergency Response Contingency Observatory Tucson, Arizona 85721 (520) 621-6524 Key Item Contents: Emergency Coordinators....................................................Appendix G #12;i Mount Graham International Observatory Emergency Response Contingency Plan Table of Contents

  16. Dynamics of the Mount Nyiragongo lava lake

    NASA Astrophysics Data System (ADS)

    Burgi, P.-Y.; Darrah, T. H.; Tedesco, D.; Eymold, W. K.

    2014-05-01

    The permanent and presently rising lava lake at Mount Nyiragongo constitutes a major potential geological hazard to the inhabitants of the Virunga volcanic region in the Democratic Republic of Congo (DRC) and Rwanda. Based on two field campaigns in June 2010 and 2011, we estimate the lava lake level from the southeastern crater rim (~400 m diameter) and lava lake area (~46,550 m2), which constrains, respectively, the lava lake volume (~9 × 106 m3) and volume flow rate needed to keep the magma in a molten state (0.6 to 3.5 m3 s-1). A bidirectional magma flow model, which includes the characterization of the conduit diameter and funnel-shaped lava lake geometry, is developed to constrain the amount of magma intruded/emplaced within the magmatic chamber and rift-related structures that extend between Mount Nyiragongo's volcanic center and the city of Goma, DRC, since Mount Nyiragongo's last eruption (17 January 2002). Besides matching field data of the lava lake level covering the period 1977 to 2002, numerical solutions of the model indicate that by 2022, 20 years after the January 2002 eruption, between 300 and 1700 × 106 m3 (0.3 to 1.7 km3) of magma could have intruded/emplaced underneath the edifice, and the lava lake volume could exceed 15 × 106 m3.

  17. Mounting assembly for heater thermostat control

    SciTech Connect

    Murphy, M.A.

    1987-04-14

    This patent describes an assembly for mounting a thermostat control on the outer wall of a heater tank including an external spud in which a heating element is mounted. The mounting assembly comprises: a first bracket made from a spring material and including a body having an opening adapted to lockingly fit over the tank spud. The first bracket further includes a pair of laterally-spaced legs extending from the body and having a bent upper end portion adapted to apply spring pressure toward the tank outer wall when the first bracket is locked on the tank spud. Each of the legs includes in the upper end portion an elongated slot having an upper end; a second bracket carrying the thermostat control and having a pair of laterally -spaced, upstanding ears adapted to fit beneath the upper end portions of the legs. Each of the ears includes a nib received in a slot for interlocking the first and the second brackets and having an upper edge adapted to engage the upper end of the slot and cooperate therewith to urge the thermostat control into firmer contact with the tank outer wall in response to upward vertical movement of the second bracket relative to the first bracket; and the assembly further characterized by a retaining lip on the first bracket, the lip located between the legs and positioned to bear against the end wall of the thermostat control when the parts are in assembled position and an outward horizontal load is applied.

  18. MEMS accelerometers in accurate mount positioning systems

    NASA Astrophysics Data System (ADS)

    Mészáros, László; Pál, András.; Jaskó, Attila

    2014-07-01

    In order to attain precise, accurate and stateless positioning of telescope mounts we apply microelectromechanical accelerometer systems (also known as MEMS accelerometers). In common practice, feedback from the mount position is provided by electronic, optical or magneto-mechanical systems or via real-time astrometric solution based on the acquired images. Hence, MEMS-based systems are completely independent from these mechanisms. Our goal is to investigate the advantages and challenges of applying such devices and to reach the sub-arcminute range { that is well smaller than the field-of-view of conventional imaging telescope systems. We present how this sub-arcminute accuracy can be achieved with very cheap MEMS sensors. Basically, these sensors yield raw output within an accuracy of a few degrees. We show what kind of calibration procedures could exploit spherical and cylindrical constraints between accelerometer output channels in order to achieve the previously mentioned accuracy level. We also demonstrate how can our implementation be inserted in a telescope control system. Although this attainable precision is less than both the resolution of telescope mount drive mechanics and the accuracy of astrometric solutions, the independent nature of attitude determination could significantly increase the reliability of autonomous or remotely operated astronomical observations.

  19. Life-cycle analysis of shipboard machinery resilient mounts

    NASA Astrophysics Data System (ADS)

    Polter, Sherwood Vern

    This thesis is about evaluating isolation performance on elastomeric mounts removed from a vessel after 20-years of service. Mount properties are evaluated to determine if extending service life is feasible. Current maintenance requires elastomeric mounts of the center bonded type to be replaced on specific machinery components regardless of condition after 20-years. To determine if mounts are still effective in providing vibration isolation, several testing methods are introduced to evaluate key performance indicators needed for more understanding of life-cycle.

  20. 29 CFR 1926.553 - Base-mounted drum hoists.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Base-mounted drum hoists. 1926.553...Elevators, and Conveyors § 1926.553 Base-mounted drum hoists. (a) General...within easy reach of the operator's station. (3) Electric motor operated hoists...control is ineffective. (4) All base-mounted drum hoists in use shall... (b) Specific requirements....

  1. Calculating Change Curves for Multitemporal Satellite Imagery: Mount St. Helens

    E-print Network

    Lawrence, Rick L.

    Calculating Change Curves for Multitemporal Satellite Imagery: Mount St. Helens 1980­1995 Rick L is flexible and allows an analyst to extract specific of Mount St. Helens in southwest Washington has been a 550 sq km the Mount St. Helens, Washington, blast zone from 1984 homogeneous "moonscape" following

  2. Ris-R-Report Flow distortion on boom mounted cup

    E-print Network

    Risø-R-Report Flow distortion on boom mounted cup anemometers Petter Lindelöw-Marsden, Troels F, Rozenn Wagner Uwe Paulsen and Michael S. Courtney Title: Flow distortion on boom mounted cup anemometers cup anemometers. The boom mounting on the studied lattice tower is performed according to IEC standard

  3. 14 CFR 23.363 - Side load on engine mount.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...1 2012-01-01 2012-01-01 false Side load on engine mount. 23.363 Section 23.363 ...AND COMMUTER CATEGORY AIRPLANES Structure Flight Loads § 23.363 Side load on engine mount. (a) Each engine mount and...

  4. 14 CFR 23.363 - Side load on engine mount.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...1 2011-01-01 2011-01-01 false Side load on engine mount. 23.363 Section 23.363 ...AND COMMUTER CATEGORY AIRPLANES Structure Flight Loads § 23.363 Side load on engine mount. (a) Each engine mount and...

  5. 14 CFR 23.363 - Side load on engine mount.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...1 2010-01-01 2010-01-01 false Side load on engine mount. 23.363 Section 23.363 ...AND COMMUTER CATEGORY AIRPLANES Structure Flight Loads § 23.363 Side load on engine mount. (a) Each engine mount and...

  6. 14 CFR 23.363 - Side load on engine mount.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...1 2014-01-01 2014-01-01 false Side load on engine mount. 23.363 Section 23.363 ...AND COMMUTER CATEGORY AIRPLANES Structure Flight Loads § 23.363 Side load on engine mount. (a) Each engine mount and...

  7. 14 CFR 23.363 - Side load on engine mount.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...1 2013-01-01 2013-01-01 false Side load on engine mount. 23.363 Section 23.363 ...AND COMMUTER CATEGORY AIRPLANES Structure Flight Loads § 23.363 Side load on engine mount. (a) Each engine mount and...

  8. 6. Collapsed Panama Mount on beach as seen in photograph ...

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

    6. Collapsed Panama Mount on beach as seen in photograph no. 2. Exposed underside to extant Panama Mount and ammunition depot are seen at top of cliff left of center. Looking 342° NNW. - Fort Funston, Panama Mounts for 155mm Guns, Skyline Boulevard & Great Highway, San Francisco, San Francisco County, CA

  9. 5. Panama Mount. Note concrete ring and metal rail. Foundation ...

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

    5. Panama Mount. Note concrete ring and metal rail. Foundation for ammunition depot noted in photograph no.3 is seen at center rear of mount. Camera position for photograph no. 1 is seen on road at left center distance. Looking 163° S. - Fort Funston, Panama Mounts for 155mm Guns, Skyline Boulevard & Great Highway, San Francisco, San Francisco County, CA

  10. Close up view of switchboard panel operator's station #1; panel ...

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

    Close up view of switchboard panel operator's station #1; panel contains 1200 push-pull button switches which control poer to red, green, and white indicating lights on the model board; white lights indicate that power is off; green lights indicate that equipment (switch breaker or transformer) is off; red lights indicate that equipment is on - Thirtieth Street Station, Power Director Center, Thirtieth & Market Streets in Amtrak Railroad Station, Philadelphia, Philadelphia County, PA

  11. Aircraft interior ANC with flat panel speakers

    NASA Astrophysics Data System (ADS)

    Gerner, Christian; Sachau, Delf; Breitbach, Harald

    2004-07-01

    In propeller driven aircraft the main source for internal noise are tonal disturbances caused by the propeller blades that are passing the fuselage. In a certain four propeller military transport aircraft the maximum sound level in the cabin can reach up to 110 dB(A), not taking into account any noise control treatments. Inside the semi closed loadmaster working station (LMWS) the sound level must be reduced down to 86 dB(A). It is proposed to reach this goal with an active noise control system, because passive solutions are to heavy at low frequencies. Optimal positions of the loudspeakers are found by finite element calculations. These positions have been realized in a full-scale test bed. A reduction of the sound pressure level of more than 30dB within a specified volume was achieved at a frequency of 100 Hz. HiFi speakers are used as secondary actuators in this test bed. These speakers are heavy and have unsuitable geometric dimensions for an aircraft. Therefore, other actuators, e.g. flat panel speakers, will be investigated with respect to the application in a mock-up of the LMWS.

  12. Aerospace Safety Advisory Panel

    NASA Astrophysics Data System (ADS)

    1989-03-01

    This report provides findings, conclusions and recommendations regarding the National Space Transportation System (NSTS), the Space Station Freedom Program (SSFP), aeronautical projects and other areas of NASA activities. The main focus of the Aerospace Safety Advisory Panel (ASAP) during 1988 has been monitoring and advising NASA and its contractors on the Space Transportation System (STS) recovery program. NASA efforts have restored the flight program with a much better management organization, safety and quality assurance organizations, and management communication system. The NASA National Space Transportation System (NSTS) organization in conjunction with its prime contractors should be encouraged to continue development and incorporation of appropriate design and operational improvements which will further reduce risk. The data from each Shuttle flight should be used to determine if affordable design and/or operational improvements could further increase safety. The review of Critical Items (CILs), Failure Mode Effects and Analyses (FMEAs) and Hazard Analyses (HAs) after the Challenger accident has given the program a massive data base with which to establish a formal program with prioritized changes.

  13. 30 Cool Facts about Mount St. Helens

    USGS Publications Warehouse

    Driedger, Carolyn; Liz, Westby; Faust, Lisa; Frenzen, Peter; Bennett, Jeanne; Clynne, Michael

    2010-01-01

    Commemorating the 30th anniversary of the 1980 eruptions of Mount St. Helens 1-During the past 4,000 years, Mount St. Helens has erupted more frequently than any other volcano in the Cascade Range. 2-Most of Mount St. Helens is younger than 3,000 years old (younger than the pyramids of Egypt). 3-Some Native American names that refer to smoke at the volcano include- Lawala Clough, Low-We- Lat-Klah, Low-We-Not- Thlat, Loowit, Loo-wit, Loo-wit Lat-kla, and Louwala-Clough. 4-3,600 years ago-Native Americans abandoned hunting grounds devastated by an enormous eruption four times larger than the May 18, 1980 eruption. 5-1792-Captain George Vancouver named the volcano for Britain's ambassador to Spain, Alleyne Fitzherbert, also known as Baron St. Helens. 6-1975-U.S. Geological Survey geologists forecasted that Mount St. Helens would erupt again, 'possibly before the end of the century.' 7-March 20, 1980-A magnitude 4.2 earthquake signaled the reawakening of the volcano after 123 years. 8-Spring 1980-Rising magma pushed the volcano's north flank outward 5 feet per day. 9-Morning of May 18, 1980- The largest terrestrial landslide in recorded history reduced the summit by 1,300 feet and triggered a lateral blast. 10-Within 3 minutes, the lateral blast, traveling at more than 300 miles per hour, blew down and scorched 230 square miles of forest. 11-Within 15 minutes, a vertical plume of volcanic ash rose over 80,000 feet. 12-Afternoon of May 18, 1980-The dense ash cloud turned daylight into darkness in eastern Washington, causing streetlights to turn on in Yakima and Ritzville. 13-The volcanic ash cloud drifted east across the United States in 3 days and encircled Earth in 15 days. 14-Lahars (volcanic mudflows) filled rivers with rocks, sand, and mud, damaging 27 bridges and 200 homes and forcing 31 ships to remain in ports upstream. 15-The May 18, 1980 eruption was the most economically destructive volcanic event in U.S. history. 16-Small plants and trees beneath winter snow, and roots protected by soil, survived the May 18, 1980 eruption and now thrive. 17-Thousands of birds, mammals, reptiles, amphibians, and millions of hatchery fingerlings perished in the eruption. 18-Late May 1980-Wind-dispersed spiders and scavenging beetles were among the first animals to return to the Mount St. Helens area. 19-The landscape devastated by the eruption has evolved into a rich and diverse habitat for plants and animals. 20-Effects of the May 18, 1980 eruption continue today. Biologists help wild salmon and steelhead by giving them a tank-truck ride to the pristine, clear creeks above sediment-choked rivers. 21-Late spring through fall 1980-Explosive eruptions on May 25, June 12, July 22, August 7, and October 16-18 rocked Mount St. Helens and sent ash to distant communities. 22-1982-Mount St. Helens National Volcanic Monument was established for all to observe both the awesome destruction and the remarkable recovery of plants and animals. 23-October 1980 to 1986- Over the course of 17 episodes, lava eruptions began filling the crater, building a lava dome that reached 876 feet above the crater floor. 24-Since 1986, snow and rock accumulating in the deep, shaded crater formed Crater Glacier, the youngest glacier on Earth. 25-September 2004-Mount St. Helens reawakened, and it erupted continuously until January 2008. 26-October 2004 to January 2008-Growing lava domes displaced and then divided Crater Glacier into east and west lobes. The ice lobes moved downslope as fast as 6 feet per day, converging below the lava dome a little more than three years later. 27-During the 2004 to 2008 eruptions-Mount St. Helens settled one half inch due to magma withdrawal beneath the volcano. 28-The Global Positioning System (GPS) instrument that detected the settling of Mount St. Helens can detect movement of as little as 1/16 of an inch and uses less power than a refrigerator lightbulb. 29-During the 1980 to 1

  14. Panel to review EOSDIS plans

    NASA Technical Reports Server (NTRS)

    1994-01-01

    Formed in Jan. 1992, the Panel to Review EOSDIS Plans was charged with advising NASA on its plans for developing the Earth Observing System (EOS) Data and Information System (EOSDIS). Specifically, the panel was asked to do the following: assess the validity of the engineering and technical underpinnings of the EOSDIS; assess its potential value to scientific users; suggest how technical risk can be minimized; and assess whether current plans are sufficiently resilient to be adaptable to changing technology and requirements such as budget environments, data volumes, new users, and new databases. The panel completed an interim report (Addendum A) and transmitted it to NASA and other interested parties in the government on 9 Apr. 1992. Because of a delay in NASA's plans to select the contractor for EOSDIS, the panel was not able to complete its review of the program according to the original government request. With the issuance of a letter report (Addendum B) on 28 Sep. 1992, the panel became inactive until such time as NASA could release the details of the contractor's proposed architecture, schedule, and costs for developing EOSDIS. In early 1993, NASA awarded the contract for the EOSDIS Core System (ECS). On 20 Apr. 1993, NASA asked the panel to reconvene to do the following: ( 1) complete its review of NASA's approach to the EOSDIS architecture and implementation; (2) appraise NASA's responses to the panel's previous recommendations; and (3) review the planning for EOSDIS in the context of NASA's role in the Global Change Data and Information System (GCDIS) implementation plan. To respond to the NASA charge, the panel met three times in 1993 including sessions with NASA officials and the EOSDIS contractor. In addition, several of the panel members visited individual Distributed Active Archive Centers (DAAC's) to obtain additional views of EOSDIS. The panel has now obtained substantial information on the EOSDIS budget, contractor work program, and current baseline architecture that was not previously available, due to procurement restrictions. This report presents the panel's findings and recommendations based on this additional information.

  15. Two Thick Microwave Dichroic Panels

    NASA Technical Reports Server (NTRS)

    Epp, Larry W.; Chen, Jacqueline C.; Stanton, Philip H.; Jorgenson, Roy E.

    1994-01-01

    Cross-shaped apertures enable relatively tight packing, eliminating some grating lobes. Two panels made of thin, honey-comblike metal walls constitute planar arrays of waveguidelike apertures designed to satisfy special requirements with respect to microwave transmittance and reflectance. Considered for use in multiplexing signals at various frequencies in microwave communication system. Both panels required to exhibit low insertion loss. Angle of incidence 30 degrees.

  16. NASA Aerospace Safety Advisory Panel

    NSDL National Science Digital Library

    Established by Congress after the Apollo spacecraft fire in January 1967, the Aerospace Safety Advisory Panel (ASAP) is an independent group of experts tasked with advising "the NASA Administrator and Congress on all safety-related issues -- design, development, manufacturing, flight preparation, and missions operations -- concerning NASA's human space flight programs." The ASAP homepage features the text of previous annual reports and general information about the Panel and its activities.

  17. ATST telescope mount: telescope of machine tool

    NASA Astrophysics Data System (ADS)

    Jeffers, Paul; Stolz, Günter; Bonomi, Giovanni; Dreyer, Oliver; Kärcher, Hans

    2012-09-01

    The Advanced Technology Solar Telescope (ATST) will be the largest solar telescope in the world, and will be able to provide the sharpest views ever taken of the solar surface. The telescope has a 4m aperture primary mirror, however due to the off axis nature of the optical layout, the telescope mount has proportions similar to an 8 meter class telescope. The technology normally used in this class of telescope is well understood in the telescope community and has been successfully implemented in numerous projects. The world of large machine tools has developed in a separate realm with similar levels of performance requirement but different boundary conditions. In addition the competitive nature of private industry has encouraged development and usage of more cost effective solutions both in initial capital cost and thru-life operating cost. Telescope mounts move relatively slowly with requirements for high stability under external environmental influences such as wind buffeting. Large machine tools operate under high speed requirements coupled with high application of force through the machine but with little or no external environmental influences. The benefits of these parallel development paths and the ATST system requirements are being combined in the ATST Telescope Mount Assembly (TMA). The process of balancing the system requirements with new technologies is based on the experience of the ATST project team, Ingersoll Machine Tools who are the main contractor for the TMA and MT Mechatronics who are their design subcontractors. This paper highlights a number of these proven technologies from the commercially driven machine tool world that are being introduced to the TMA design. Also the challenges of integrating and ensuring that the differences in application requirements are accounted for in the design are discussed.

  18. Noise transmission and attenuation by stiffened panels

    Microsoft Academic Search

    R. Vaicaitis; M. Slazak; M. T. Chang

    1980-01-01

    An analytical study of noise transmission into semi-cylindrical and rectangular acoustic enclosures due to turbulent boundary layer pressure and propeller noise (prop-fan) is presented. The structural noise transmission models include a single panel, discretely stiffened elastic panel and stiffened viscoelastic sandwich panel. Response characteristics of the stiffened panels are evaluated using a transfer matrix procedure. The interior noise field is

  19. Woodbiological investigations on panels of rembrandt paintings

    Microsoft Academic Search

    J. Bauch; D. Eckstein

    1981-01-01

    Paintings on 150 wooden panels accepted and not accepted as authentic Rembrandts were investigated using wood-anatomical and dendrochronological techniques. Paintings on 131 panels came from oaks in the coastal area of the Netherlands and 1 panel came from an oak in the interior. The wood of the remaining 18 panels was from beech, poplar and walnut, presumably from the Netherlands,

  20. Growth Empirics: A Panel Data Approach

    Microsoft Academic Search

    Nazrul Islam

    1995-01-01

    A panel data approach is advocated and implemented for studying growth convergence. The familiar equation for testing convergence is reformulated as a dynamic panel data model and different panel data estimators are used to estimate it. The main usefulness of the panel approach lies in its ability to allow for differences in the aggregate production function across economies. This leads

  1. Habitat changes: Mount Haggin Wildlife Management Area

    USGS Publications Warehouse

    Frisina, M.R.; Keigley, R.B.

    2004-01-01

    In 1984, a rest-rotation grazing system was established on the Mount Haggin Wildlife Management Area (MHWMA) in southwest Montana. The area is a mixture of wet and dry meadow types, grass/shrublands, and forest. Prior to implementing the grazing system, photo-monitoring points were established on the MHWMA at locations were cattle concentrate were grazing. The area consists of a three pasture rest-rotation system incorporating 20,000 acres. Photo essays revealed changes in riparian, lowland, and upland sites within the grazing system. In addition, gross changes in the amount of willow present were documented.

  2. Timing considerations of Helmet Mounted Display performance

    NASA Technical Reports Server (NTRS)

    Tharp, Gregory; Liu, Andrew; French, Lloyd; Lai, Steve; Stark, Lawrence

    1992-01-01

    The Helmet Mounted Display (HMD) system developed in our lab should be a useful teleoperator systems display if it increases operator performance of the desired task; it can, however, introduce degradation in performance due to display update rate constraints and communication delays. Display update rates are slowed by communication bandwidth and/or computational power limitations. We used simulated 3D tracking and pick-and-place tasks to characterize performance levels for a range of update rates. Initial experiments with 3D tracking indicate that performance levels plateau at an update rate between 10 and 20 Hz. We have found that using the HMD with delay decreases performance as delay increases.

  3. Mount St. Helens Volcano, WA, USA

    NASA Technical Reports Server (NTRS)

    1992-01-01

    Mount St. Helens Volcano (46.0N, 122.0W) and its blast zone can be seen in this northeast looking infrared view. Mt. Rainier and Mt. Adams can also be seen in the near area. The Columbia River can be seen at the bottom of the view. When Mt. St. Helens erupted on 18 May 80, the top 1300 ft. disappeared within minutes. The blast area covered an area of more than 150 sq. miles and sent thousands of tons of ash into the upper atmosphere.

  4. Mount Pinatubo: Predicting a Volcanic Eruption

    NSDL National Science Digital Library

    In spite of the unpredictability of volcanoes, scientists have learned to read the many signs they display prior to an eruption, in the hope of minimizing damage to lives and personal property. This video segment describes efforts of scientists at the Pinatubo Volcanic Observatory to read the signs presented by Mount Pinatubo, just before it unleashed one of the most powerful eruptions of the 20th century. The segment is six minutes fifty-seven minutes in length. A background essay and list of discussion questions supplement the video.

  5. Mount St. Helens VolcanoCam

    NSDL National Science Digital Library

    This webcam shows a static image of Mount St. Helens taken from the Johnston Ridge Observatory. The Observatory and VolcanoCam are located at an elevation of approximately 4,500 feet, about five miles from the volcano. The observer is looking approximately south-southeast across the North Fork Toutle River Valley. The VolcanoCam image automatically updates approximately every five minutes. Other features include current conditions reports, weather updates, an image achive, and eruption movies. In addition, there are frequently asked questions, and information about using the VolcanoCam image and funding for the VolcanoCam.

  6. Numerical analysis for structural health monitoring of a damaged composite panel using PZT actuators and sensors

    NASA Astrophysics Data System (ADS)

    Nagabhushana, A.; Spiegel, M.; Adu, S.; Hayes, N.; Paul, D.; Trivedi, K.; Fairbee, B.; Zheng, H.; Gerrity, A.; Kotru, S.; Roy, S.; Barkey, M.; Burkett, S. L.

    2012-04-01

    Reliable damage detection is crucial for assessing the integrity of a structure. In this paper, a numerical study of a composite panel fabricated to simulate a crack is undertaken using finite element methods (FEM). The damage to be considered is a transverse crack which pre-exists in the structure. The finite element models are developed for an undamaged and a damaged composite panel to compute the change in Lamb wave response due to the existence of a crack. The model is validated using shear lag analysis applied at the crack. The results are verified experimentally by comparing the results for an undamaged composite panel and a composite panel fabricated with a simulated crack using the vacuum assisted resin transfer molding (VARTM) process. The responses for each panel are obtained using surface mounted lead zirconate titanate (PZT) actuators and sensors. PZT is used to generate Lamb waves which produce stress throughout the panel thickness. Propagation characteristics of Lamb waves are varied by the presence of damage. The sensor data provide reliable information about the integrity of the structure. Numerical results are compared to the sensor output to ensure accuracy of the damage detection system.

  7. Forces and pressures beneath the saddle during mounting from the ground and from a raised mounting platform.

    PubMed

    Geutjens, C A; Clayton, H M; Kaiser, L J

    2008-03-01

    The objective was to use an electronic pressure mat to measure and compare forces and pressures of the saddle on a horse's back when riders mounted from the ground and with the aid of a mounting platform. Ten riders mounted a horse three times each from the ground and from a 35 cm high mounting platform in random order. Total force (summation of forces over all 256 sensors) was measured and compared at specific points on the force-time curve. Total force was usually highest as the rider's right leg was swinging upwards and was correlated with rider mass. When normalized to rider mass, total force and peak pressure were significantly higher when mounting from the ground than from a raised platform (P<0.05). The area of highest pressure was on the right side of the withers in 97% of mounting efforts, confirming the importance of the withers in stabilizing the saddle during mounting. PMID:17572121

  8. Mount Wilson Telescope to be mothballed

    NASA Astrophysics Data System (ADS)

    As part of its plan to direct resources to its astronomical research facilities in Chile, the Carnegie Institution of Washington will mothball the Mount Wilson 2.54-m telescope on July 1, 1985, and will gradually decrease support for the 45.7-m and 18.3-m solar tower telescopes. Concurrently, the Mount Wilson and Las Campanas Observatories' technical development group in Pasadena, Calif., will be expanded.New equipment will be acquired for the Las Campanas Observatory in Chile, where Carnegie operates two modern telescopes. A charged coupled device camera will be added to the 1.0-m telescope at the observatory to yield more accurate imaging of extremely faint objects. Another charged coupled device will enable the recording of spectra of extended sources, including galaxies and emitting clouds. Eventually, this device will permit fiber-optical feeds for the simultaneous recording of many objects in a group of stars or galaxies. Also on the list is a new spectrograph that will introduce high-resolution spectroscopy for the first time at the Las Campanas Observatory's 2.54-m telescope. Computer facilities at the observatory will be upgraded. In addition, improvements will be made for the television viewing systems that aid in locating faint sources in the telescope field of view.

  9. Anaglyph with Landsat Overlay, Mount Meru, Tanzania

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Mount Meru is an active volcano located just 70 kilometers (44 miles) west of Mount Kilimanjaro. It reaches 4,566 meters (14,978 feet) in height but has lost much of its bulk due to an eastward volcanic blast sometime in its distant past, perhaps similar to the eruption of Mount Saint Helens in Washington State in 1980. Mount Meru most recently had a minor eruption about a century ago. The several small cones and craters seen in the vicinity probably reflect numerous episodes of volcanic activity. Mount Meru is the topographic centerpiece of Arusha National Park, but Ngurdoto Crater to the east (image top) is also prominent. The fertile slopes of both volcanoes rise above the surrounding savanna and support a forest that hosts diverse wildlife, including nearly 400 species of birds, and also monkeys and leopards, while the floor of Ngurdoto Crater hosts herds of elephants and buffaloes.

    The stereoscopic effect of this anaglyph was created by first draping a Landsat satellite image over a digital elevation data from the Shuttle Radar Topography Mission (SRTM), and then generating two differing perspectives, one for each eye. When viewed through special glasses, the result is a vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter.

    Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter (98-foot) resolution of most Landsat images and will substantially help in analyzing the large and growing Landsat image archive, managed by the U.S. Geological Survey (USGS).

    Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Earth Science Enterprise, Washington, D.C.

    Size: 37.1 kilometers (23.0 miles) by 20.3 kilometers (12.6 miles) Location: 3.2 degrees South latitude, 36.7 degrees East longitude Orientation: East at top Image Data: Landsat Bands 1, 2, 3, and 4 blended as gray. Original Data Resolution: SRTM 1 arc-second (30 meters or 98 feet) Date Acquired: February 2000 (SRTM), February 21, 2000 (Landsat 7)

  10. The May 25-27 2005 Mount Logan Storm: Implications for the reconstruction of the climate signal contained in Gulf of Alaska Ice Cores

    Microsoft Academic Search

    K. Moore; G. Holdsworth

    2006-01-01

    In late May 2005, 3 climbers were immobilized at 5400 m on Mount Logan, Canada`s highest mountain, by the high impact weather associated with an extratropical cyclone over the Gulf of Alaska. Rescue operations were hindered by the high winds, cold temperatures, and heavy snowfall associated with the storm. Ultimately, the climbers were rescued after the weather cleared. Just prior

  11. Deposits of large volcanic debris avalanches at Mount St. Helens and Mount Shasta volcanoes

    SciTech Connect

    Glicken, H.

    1985-01-01

    Large volcanic debris avalanches are among the world's largest mass movements. The rockslide-debris avalanche of the May 18, 1980, eruption of Mount St. Helens produced a 2.8 km/sup 3/ deposit and is the largest historic mass movement. A Pleistocene debris avalanche at Mount Shasta produced a 26 km/sup 3/ deposit that may be the largest Quaternary mass movement. The hummocky deposits at both volcanoes consist of rubble divided into (1) block facies that comprises unconsolidated pieces of the old edifice transported relatively intact, and (2) matrix facies that comprises a mixture of rocks from the old mountain and material picked up from the surrounding terrain. At Mount St. Helens, the juvenile dacite is found in the matrix facies, indicating that matrix facies formed from explosions of the erupting magma as well as from disaggregation and mixing of blocks. The block facies forms both hummocks and interhummock areas in the proximal part of the St. Helens avalanche deposit. At Mount St. Helens, the density of the old cone is 21% greater than the density of the avalanche deposit. Block size decreases with distance. Clast size, measured in the field and by sieving, coverages about a mean with distance, which suggests that blocks disaggregated and mixed together during transport.

  12. F-15B in flight with test panels covered with advanced spray-on foam insulation material for the Spa

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Test panels covered with an advanced foam insulation material for the Space Shuttle's giant external fuel tank were test flown aboard an F-15B research aircraft at NASA's Dryden Flight Research Center, Edwards, Calif. Six panels were mounted on the left side of a heavily instrumented Flight Text Fixture mounted underneath the F-15B's fuselage. Insulation on this panel was finely machined over a horizontal rib structure to simulate in-line airflow past the tank; other panels had the ribs mounted vertically or had the insulation left in a rough as-sprayed surface. The tests were part of an effort by NASA's Marshall Space Flight Center to determine why small particles of the new insulation flaked off the tank on recent Shuttle missions. The tests with Dryden's F-15B were designed to replicate the pressure environment the Shuttle encounters during the first minute after launch. No noticeable erosion of the insulation material was noted after the flight experiment at Dryden.

  13. Close-up of test panels covered with advanced spray-on foam insulation material for the Space Shuttl

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Test panels covered with an advanced foam insulation material for the Space Shuttle's giant external fuel tank were test flown aboard an F-15B research aircraft at NASA's Dryden Flight Research Center, Edwards, Calif. Six panels were mounted on the left side of a heavily instrumented Flight Text Fixture mounted underneath the F-15B's fuselage. Insulation on this panel was finely machined over a horizontal rib structure to simulate in-line airflow past the tank; other panels had the ribs mounted vertically or had the insulation left in a rough as-sprayed surface. The tests were part of an effort by NASA's Marshall Space Flight Center to determine why small particles of the new insulation flaked off the tank on recent Shuttle missions. The tests with Dryden's F-15B were designed to replicate the pressure environment the Shuttle encounters during the first minute after launch. No noticeable erosion of the insulation material was noted after the flight experiment at Dryden.

  14. Postbuckling of laminated anisotropic panels

    NASA Technical Reports Server (NTRS)

    Jeffrey, Glenda L.

    1987-01-01

    A two-part study of the buckling and postbuckling of laminated anisotropic plates with bending-extensional coupling is presented. The first part involves the development and application of a modified Rayleigh-Ritz analysis technique. Modifications made to the classical technique can be grouped into three areas. First, known symmetries of anisotropic panels are exploited in the selection of approximation functions. Second, a reduced basis technique based on these same symmetries is applied in the linear range. Finally, geometric boundary conditions are enforced via an exterior penalty function approach, rather than relying on choice of approximation functions to satisfy these boundary conditions. Numerical results are presented for both the linear and nonlinear range, with additional studies made to determine the effect of variation in penalty parameter and number of basis vectors. In the second part, six panels possessing anisotropy and bending-extensional coupling are tested. Detailed comparisons are made between experiment and finite element results in order to gain insight into the postbuckling and failure characteristics of such panels. The panels are constructed using two different lamination sequences, and panels with three different aspect ratios were constructed for each lamination sequence.

  15. Heavy Flavors

    NASA Astrophysics Data System (ADS)

    Cox, B.; Soni, A.

    This is a summary report of the working group on Heavy Flavors. Discussions at the workshop were centered on B physics and on the signals for heavy quarks and leptons at the SSC. The Working Group Members were: V. Barger, H.-U. Bengtsson, C. Buchanan, I. Bigi, M. Block, B. Cox, N. Glover, J. Hewett, W.Y. Keung, B. Margolis, T. Rizzo, M. Suzuki, A. Soni, D. Stork, and S. Willenbrock.

  16. Space radar image of Mount Everest

    NASA Technical Reports Server (NTRS)

    1995-01-01

    These are two comparison images of Mount Everest and its surroundings, along the border of Nepal and Tibet. The peak of Mount Everest, the highest elevation on Earth at 8,848 meters (29,028 feet), can be seen near the center of each image. The image at the top was acquired through thick cloud cover by the Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar (SIR-C/X-SAR) aboard the space shuttle Endeavour on April 16, 1994. The image on the bottom is an optical photograph taken by the Endeavour crew under clear conditions during the second flight of SIR-C/X-SAR on October 10, 1994. Both images show an area approximately 70 kilometers by 38 kilometers (43 miles by 24 miles) that is centered at 28.0 degrees north latitude and 86.9 degrees east longitude. North is toward the upper left. The colors in the radar image were obtained using the following radar channels: red represents the L-band (horizontally transmitted and received); green represents the L-band (horizontally transmitted and vertically received); blue represents the C-band (horizontally transmitted and vertically received). Radar illumination is from the top of the frame. The optical photograph has been geometrically adjusted to better match the area shown in the radar image. Many features of the Himalayan terrain are visible in both images. Snow covered areas appear white in the optical photograph while the same areas appear bright blue in the radar image. The radar image was taken in early spring and shows deep snow cover, while the optical photograph was taken in late summer and shows minimum snow cover. The curving and branching features seen in both images are glaciers. The two wavelengths and multiple polarizations of the SIR-C radar are sensitive to characteristics of the glacier surfaces that are not detected by conventional photography, such as the ice roughness, water content and stratification. For this reason, the glaciers show a variety of colors in the radar image (blue, purple, red, yellow, white) but only appear as gray or white in the photograph. Field data from other SIR-C/X-SAR test sites, such as the Alpine glaciers of Austria, are being used to help interpret data from remote regions like Mount Everest.

  17. Camera Mount for a Head-Up Display

    NASA Technical Reports Server (NTRS)

    Geoge, Wayne; Barnes, Monica; Johnson, Larry; Shelton, Kevin

    2007-01-01

    A mounting mechanism was designed and built to satisfy requirements specific to a developmental head-up display (HUD) to be used by pilots in a Boeing 757 airplane. This development was necessitated by the fact that although such mounting mechanisms were commercially available for other airplanes, there were none for the 757. The mounting mechanism supports a miniature electronic camera that provides a forward view. The mechanism was designed to be integrated with the other HUD instrumentation and to position the camera so that what is presented to the pilot is the image acquired by the camera, overlaid with alphanumeric and/or graphical symbols, from a close approximation of the pilot s natural forward perspective. The mounting mechanism includes an L-shaped mounting arm that can be adjusted easily to the pilot s perspective, without prior experience. The mounting mechanism is lightweight and flexible and presents little hazard to the pilot.

  18. Experimental Evaluation of Optically Polished Aluminum Panels on the Deep Space Network's 34 Meter Antenna

    NASA Technical Reports Server (NTRS)

    Vilnrotter, V.

    2011-01-01

    The potential development of large aperture ground?based "photon bucket" optical receivers for deep space communications has received considerable attention recently. One approach currently under investigation is to polish the aluminum reflector panels of 34?meter microwave antennas to high reflectance, and accept the relatively large spotsize generated by state of?the?art polished aluminum panels. Theoretical analyses of receiving antenna pointing, temporal synchronization and data detection have been addressed in previous papers. Here we describe the experimental effort currently underway at the Deep Space Network (DSN) Goldstone Communications Complex in California, to test and verify these concepts in a realistic operational environment. Two polished aluminum panels (a standard DSN panel polished to high reflectance, and a custom designed aluminum panel with much better surface quality) have been mounted on the 34 meter research antenna at Deep?Space Station 13 (DSS?13), and a remotely controlled CCD camera with a large CCD sensor in a weather?proof container has been installed next to the subreflector, pointed directly at the custom polished panel. The point?spread function (PSF) generated by the Vertex polished panel has been determined to be smaller than the sensor of the CCD camera, hence a detailed picture of the PSF can be obtained every few seconds, and the sensor array data processed to determine the center of the intensity distribution. In addition to estimating the center coordinates, expected communications performance can also been evaluated with the recorded data. The results of preliminary pointing experiments with the Vertex polished panel receiver using the planet Jupiter to simulate the PSF generated by a deep?space optical transmitter are presented and discussed in this paper.

  19. Monitoring machine-mounted dust scrubber performance

    SciTech Connect

    Taylor, C.D.; Thimons, E.D. [Bureau of Mines, Pittsburgh, PA (United States); Kovscek, P.D. [SMI, Pittsburgh, PA (United States)

    1995-12-31

    When blowing ventilation is used on a mining section, a machine-mounted scrubber is often required to maintain face dust levels below 2 mg/m{sup 3}. Operation of the scrubber also affects airflow patterns at the face and the dilution of liberated methane. Reductions in scrubber flow can result in increased methane concentrations. During mining, loading of the scrubber filter with dust is likely to reduce airflow. Detecting changes in scrubber flow is difficult, especially with extended cutting, because the machine must be operated from a remote location. Tests were conducted to demonstrate how scrubber airflow could be continuously monitored at a remote location. Three variables, static pressure at the fan inlet, differential pressure across the scrubber filter, and scrubber fan motor current, were continuously monitored while the scrubber filter was incrementally loaded to reduce air flow. The results show that monitoring each variable provided a way for estimating scrubber flow.

  20. Rack assembly for mounting solar modules

    DOEpatents

    Plaisted, Joshua Reed; West, Brian

    2012-09-04

    A rack assembly is provided for mounting solar modules over an underlying body. The rack assembly may include a plurality of rail structures that are arrangeable over the underlying body to form an overall perimeter for the rack assembly. One or more retention structures may be provided with the plurality of rail structures, where each retention structure is configured to support one or more solar modules at a given height above the underlying body. At least some of the plurality of rail structures are adapted to enable individual rail structures to be sealed over the underlying body so as to constrain air flow underneath the solar modules. Additionally, at least one of (i) one or more of the rail structures, or (ii) the one or more retention structures are adjustable so as to adapt the rack assembly to accommodate solar modules of varying forms or dimensions.

  1. Rack assembly for mounting solar modules

    DOEpatents

    Plaisted, Joshua Reed (Oakland, CA); West, Brian (San Francisco, CA)

    2010-12-28

    A rack assembly is provided for mounting solar modules over an underlying body. The rack assembly may include a plurality of rail structures that are arrangeable over the underlying body to form an overall perimeter for the rack assembly. One or more retention structures may be provided with the plurality of rail structures, where each retention structure is configured to support one or more solar modules at a given height above the underlying body. At least some of the plurality of rail structures are adapted to enable individual rail structures o be sealed over the underlying body so as to constrain air flow underneath the solar modules. Additionally, at least one of (i) one or more of the rail structures, or (ii) the one or more retention structures are adjustable so as to adapt the rack assembly to accommodate solar modules of varying forms or dimensions.

  2. In the wake of Mount St Helens.

    PubMed

    Nania, J; Bruya, T E

    1982-04-01

    On May 18, 1980, Mount St Helens, Washington State's most active volcano, erupted violently. Volcanic eruptions in recent geologic history have demonstrated tremendous environmental impact and caused significant loss of human life. Volcanic ash expelled during the eruption was deposited on much of eastern Washington and had a profound effect on local air quality. Although ash is relatively inert, analysis revealed a small but significant amount of free crystalline silica, the causative agent of silicosis. The fine particles of ash were of respirable size, and there was a remarkable increase in the volume of respiratory cases seen in emergency departments during the period of high airborne particulate levels. Numerous cases of injury indirectly related to the fall of ash were also seen. The long-term effect of exposure to this volcanic ash is unknown. A prompt, coordinated community medical response is necessary to protect the general population from the potential hazard of exposure to volcanic ash. PMID:7073033

  3. Lidar measurements of Mount St. Helens effluents

    NASA Technical Reports Server (NTRS)

    Mccormick, M. P.

    1982-01-01

    Lidar measurements of the worldwide movement of stratospheric aerosols produced by the 18 May 1980 eruption of Mount St. Helens are described. Ground-based and airborne measurements show that the layers below 20 km produced by this eruption moved in an easterly direction while those above 20 km moved in a westerly direction. The effluent at jet stream altitudes of 10 to 12 km circled the globe in about 16 days and the effluent at 23 km (the highest altitude recorded) circled the globe in about 56 days. Mass calculations, using backscatter-to-mass conversion models, indicate that approximately half a million metric tons of new stratospheric material were produced by this eruption. Even though this represents a 200% increase in Northern Hemispheric aerosol, no significant long-term atmospheric temperature change should occur.

  4. Mount St. Helens' volcanic ash: hemolytic activity.

    PubMed

    Vallyathan, V; Mentnech, M S; Stettler, L E; Dollberg, D D; Green, F H

    1983-04-01

    Volcanic ash samples from four Mount St. Helens' volcanic eruptions were subjected to mineralogical, analytical, and hemolytic studies in order to evaluate their potential for cytotoxicity and fibrogenicity. Plagioclase minerals constituted the major component of the ash with free crystalline silica concentrations ranging from 1.5 to 7.2%. The in vitro hemolytic activity of the volcanic ash was compared to similar concentrations of cytotoxic and inert minerals. The ash was markedly hemolytic, exhibiting an activity similar to chrysotile asbestos, a known fibrogenic agent. The hemolysis of the different ash samples varied with particle size but not with crystalline silica concentration. The results of these studies taken in conjunction with the results of our animal studies indicate a fibrogenic potential of volcanic ash in heavily exposed humans. PMID:6832120

  5. A visit to Mount St. Helens

    SciTech Connect

    Meadows, D.G.

    1994-04-01

    The May 18, 1980, eruption displaced roughly 2.6 km[sup 3] of rock and devastated more than 500 km[sup 2] of forest, mostly to the north of the mountain. Trees within 10--15 km of the mountain peak were burned and uprooted. Beyond that, high winds and flying debris created a blowdown zone. Up to 150 m of rock and ice covered some areas. Accumulations of ash were measured as much as 330 km from the volcano. Mud flows choked nearby rivers and streams. Two years later, the US Congress established the 44,000-hectare Mount St. Helens National Volcanic Monument. The Act essentially directed the USDA Forest Service to allow the area to recover naturally. The paper reviews what changes the ecosystem has been going through since the eruption and the lessons learned that suggest some new resource management techniques.

  6. In the wake of Mount St Helens

    SciTech Connect

    Nania, J.; Bruya, T.E.

    1982-04-01

    On May 18, 1980, Mount St Helens, Washington State's most active volcano, erupted violently. Volcanic eruptions in recent geologic history have demonstrated tremendous environmental impact and caused significant loss of human life. Volcanic ash expelled during the eruption was deposited on much of eastern Washington and had a profound effect on local air quality. Although ash is relatively inert, analysis revealed a small but significant amount of free crystalline silica, the causative agent of silicosis. The fine particles of ash were of respirable size, and there was a remarkable increase in the volume of respiratory cases seen in emergency departments during the period of high airborne particulate levels. Numerous cases of injury indirectly related to the fall of ash were also seen. The long-term effect of exposure to this volcanic ash is unknown. A prompt, coordinated community medical response is necessary to protect the general population from the potential hazard of exposure to volcanic ash.

  7. Photovoltaic array mounting apparatus, systems, and methods

    DOEpatents

    West, John Raymond; Atchley, Brian; Hudson, Tyrus Hawkes; Johansen, Emil

    2014-12-02

    An apparatus for mounting a photovoltaic (PV) module on a surface, including a support with an upper surface, a lower surface, tabs, one or more openings, and a clip comprising an arm and a notch, where the apparatus resists wind forces and seismic forces and creates a grounding electrical bond between the PV module, support, and clip. The invention further includes a method for installing PV modules on a surface that includes arranging supports in rows along an X axis and in columns along a Y axis on a surface such that in each row the distance between two neighboring supports does not exceed the length of the longest side of a PV module and in each column the distance between two neighboring supports does not exceed the length of the shortest side of a PV module.

  8. Article mounting and position adjustment stage

    DOEpatents

    Cutburth, Ronald W. (Tracy, CA); Silva, Leonard L. (Livermore, CA)

    1988-01-01

    An improved adjustment and mounting stage of the type used for the detection of laser beams is disclosed. A ring sensor holder has locating pins on a first side thereof which are positioned within a linear keyway in a surrounding housing for permitting reciprocal movement of the ring along the keyway. A rotatable ring gear is positioned within the housing on the other side of the ring from the linear keyway and includes an oval keyway which drives the ring along the linear keyway upon rotation of the gear. Motor-driven single-stage and dual (x, y) stage adjustment systems are disclosed which are of compact construction and include a large laser transmission hole.

  9. Article mounting and position adjustment stage

    DOEpatents

    Cutburth, R.W.; Silva, L.L.

    1988-05-10

    An improved adjustment and mounting stage of the type used for the detection of laser beams is disclosed. A ring sensor holder has locating pins on a first side thereof which are positioned within a linear keyway in a surrounding housing for permitting reciprocal movement of the ring along the keyway. A rotatable ring gear is positioned within the housing on the other side of the ring from the linear keyway and includes an oval keyway which drives the ring along the linear keyway upon rotation of the gear. Motor-driven single-stage and dual (x, y) stage adjustment systems are disclosed which are of compact construction and include a large laser transmission hole. 6 figs.

  10. Mount Hood Wilderness and adjacent areas, Oregon

    SciTech Connect

    Keith, T.E.C.; Causey, J.D.

    1984-01-01

    A mineral survey of the Mount Hood Wilderness, Oregon, was conducted in 1980. Geochemical data indicate two areas of substantiated mineral-resource potential containing weak epithermal mineralization: an area on the north side of Zigzag Mountain, where vein-type lead-zinc-silver deposits occur and an area on the south side of Zigzag Mountain, where the upper part of a quartz diorite pluton has propylitic alteration associated with mineralization of copper, gold, silver, lead, and zinc in discontinuous veins. Geothermal-resource potential for low- to intermediate-temperature (less than 248/sup 0/F) hot-water systems in the wilderness is probable in three areas. Part of the wilderness is classified as a Known Geothermal Resource Area (KGRA), which is considered to have probable geothermal-resource potential, and two parts of the wilderness have been included in geothermal lease areas.

  11. Large Scale Composite Manufacturing for Heavy Lift Launch Vehicles

    NASA Technical Reports Server (NTRS)

    Stavana, Jacob; Cohen, Leslie J.; Houseal, Keth; Pelham, Larry; Lort, Richard; Zimmerman, Thomas; Sutter, James; Western, Mike; Harper, Robert; Stuart, Michael

    2012-01-01

    Risk reduction for the large scale composite manufacturing is an important goal to produce light weight components for heavy lift launch vehicles. NASA and an industry team successfully employed a building block approach using low-cost Automated Tape Layup (ATL) of autoclave and Out-of-Autoclave (OoA) prepregs. Several large, curved sandwich panels were fabricated at HITCO Carbon Composites. The aluminum honeycomb core sandwich panels are segments of a 1/16th arc from a 10 meter cylindrical barrel. Lessons learned highlight the manufacturing challenges required to produce light weight composite structures such as fairings for heavy lift launch vehicles.

  12. Artificial Surface-Mounted Molecular Dipolar Rotors

    NASA Astrophysics Data System (ADS)

    Michl, Josef

    2003-03-01

    Several types of dipolar molecules have been synthesized and mounted on flat surfaces of solids and mercury. Each molecule contains an axle about which the dipolar rotor can rotate. In azimuthal rotors, the axle is normal to the surface, and in altitudinal rotors, it is parallel to the surface. The rotor-carrying surfaces have been characterized by standard tools: grazing incidence spectroscopy, ellipsometry, Auger spectroscopy, scanning microscopy, and in the case of mercury, also Langmuir isotherm and electrochemistry. The response of the mounted rotors to electric field has been studied by dielectric measurements as a function of temperature. The resulting data have been compared with the results of molecular dynamics simulations performed using the Universal Force Field of Rappe and Goddard. For a rotating electric field, these can be summarized in the form of log-log plots of electric field strength versus frequency. Different regions in this "rotor phase diagram" correspond to different types of response by the rotor to the driving field: synchronous rotation, asynchronous rotation, random driven motion, random thermal motion, and hindered motion. In order for the rotor to act like an electrical motor, at low frequencies the driving force has to overcome the larger of the two resisting factors, random thermal motion or intrinsic potential barrier to rotation, and at high frequencies, it needs to overcome friction (intramolecular energy redistribution from the driven rotational mode into other degrees of freedom). A simple "shaking washboard" model fits the computational results well and permits the outcome of a large number of numerical simulations to be summarized in values of a frequency-dependent friction constant.

  13. 29 CFR 1926.553 - Base-mounted drum hoists.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 2013-07-01 false Base-mounted drum hoists. 1926.553...Elevators, and Conveyors § 1926.553 Base-mounted drum hoists. (a) General...within easy reach of the operator's station. (3) Electric motor operated hoists...control is ineffective. (4) All base-mounted drum hoists in use shall... (b) Specific requirements. [Reserved] (c) This section does not......

  14. 29 CFR 1926.553 - Base-mounted drum hoists.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 2012-07-01 false Base-mounted drum hoists. 1926.553...Elevators, and Conveyors § 1926.553 Base-mounted drum hoists. (a) General...within easy reach of the operator's station. (3) Electric motor operated hoists...control is ineffective. (4) All base-mounted drum hoists in use shall... (b) Specific requirements. [Reserved] (c) This section does not......

  15. 29 CFR 1926.553 - Base-mounted drum hoists.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Base-mounted drum hoists. 1926.553...Elevators, and Conveyors § 1926.553 Base-mounted drum hoists. (a) General...within easy reach of the operator's station. (3) Electric motor operated hoists...control is ineffective. (4) All base-mounted drum hoists in use shall... (b) Specific requirements. [Reserved] (c) This section does not......

  16. 29 CFR 1926.553 - Base-mounted drum hoists.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 2014-07-01 false Base-mounted drum hoists. 1926.553...Elevators, and Conveyors § 1926.553 Base-mounted drum hoists. (a) General...within easy reach of the operator's station. (3) Electric motor operated hoists...control is ineffective. (4) All base-mounted drum hoists in use shall... (b) Specific requirements. [Reserved] (c) This section does not......

  17. A multiple pointing-mount control strategy for space platforms

    NASA Technical Reports Server (NTRS)

    Johnson, C. D.

    1992-01-01

    A new disturbance-adaptive control strategy for multiple pointing-mount space platforms is proposed and illustrated by consideration of a simplified 3-link dynamic model of a multiple pointing-mount space platform. Simulation results demonstrate the effectiveness of the new platform control strategy. The simulation results also reveal a system 'destabilization phenomena' that can occur if the set of individual platform-mounted experiment controllers are 'too responsive.'

  18. Sound Transmission Through Multi-Panel Structures Lined with Elastic Porous Materials

    NASA Astrophysics Data System (ADS)

    Bolton, J. S.; Shiau, N.-M.; Kang, Y. J.

    1996-04-01

    Theory and measurements related to sound transmission through double panels lined with elastic porous media are presented. The information has application to the design of noise control barriers and to the optimization of aircraft fuselage transmission loss, for example. The major difference between the work described here and earlier research in this field relates to the treatment of the porous material that is used to line the cavity between the two panels of the double panel structure. Here we have used the porous material theory proposed by Biot since it takes explicit account of all the wave types known to propagate in elastic porous materials. As a result, it is possible to use the theory presented here to calculate the transmission loss of lined double panels at arbitrary angles of incidence; results calculated over a range of incidence angles may then be combined to yield the random incidence transmission loss. In this paper, the equations governing wave propagation in an elastic porous material are first considered briefly and then the general forms for the stresses and displacements within the porous material are given. Those solutions are expressed in terms of a number of constants that can be determined by application of appropriate boundary conditions. The boundary conditions required to model double panels having linings that are either directly attached to the facing panels or separated?!from them by air gaps are presented and discussed. Measurements of the random incidence transmission loss of aluminium double-panel structures lined with polyurethane foam are presented and have been found to be in good agreement with theoretical predictions. Both the theoretical predictions and the measured results have shown that the method by which an elastic porous lining material is attached to the facing panels can have a profound influence on the transmission loss of the panel system. It has been found, for example, that treatments in which the lining material is not directly attached to the facing panels are generally to be preferred to those in which the lining is directly bonded to the panels. These effects may be explained by considering the degree to which the various wave types within the elastic porous material are excited, which in turn can be related to the method by which the lining is mounted to the facing panels.

  19. The "Virtual" Panel: A Computerized Model for LGBT Speaker Panels

    ERIC Educational Resources Information Center

    Beasley, Christopher; Torres-Harding, Susan; Pedersen, Paula J.

    2012-01-01

    Recent societal trends indicate more tolerance for homosexuality, but prejudice remains on college campuses. Speaker panels are commonly used in classrooms as a way to educate students about sexual diversity and decrease negative attitudes toward sexual diversity. The advent of computer-delivered instruction presents a unique opportunity to…

  20. Convenient mounting method for electrical measurements of thin samples

    NASA Technical Reports Server (NTRS)

    Matus, L. G.; Summers, R. L.

    1986-01-01

    A method for mounting thin samples for electrical measurements is described. The technique is based on a vacuum chuck concept in which the vacuum chuck simultaneously holds the sample and established electrical contact. The mounting plate is composed of a glass-ceramic insulating material and the surfaces of the plate and vacuum chuck are polished. The operation of the vacuum chuck is examined. The contacts on the sample and mounting plate, which are sputter-deposited through metal masks, are analyzed. The mounting method was utilized for van der Pauw measurements.

  1. Experimental and finite element investigation of the buckling characteristics of a beaded skin panel for a hypersonic aircraft. Ph.D. Thesis. Final Report

    NASA Technical Reports Server (NTRS)

    Siegel, W. H.

    1978-01-01

    As part of NASA's continuing research into hypersonics and 85 square foot hypersonic wing test section of a proposed hypersonic research airplane was laboratory tested. The project reported on in this paper has carried the hypersonic wing test structure project one step further by testing a single beaded panel to failure. The primary interest was focused upon the buckling characteristics of the panel under pure compression with boundary conditions similar to those found in a wing mounted condition. Three primary phases of analysis are included in the report. These phases include: experimental testing of the beaded panel to failure; finite element structural analysis of the beaded panel with the computer program NASTRAN; a summary of the semiclassical buckling equations for the beaded panel under purely compressive loads. Comparisons between each of the analysis methods are also included.

  2. Retired NASA F-18 being mounted on pedestal mount at Lancaster California Municipal Baseball Stadium

    NASA Technical Reports Server (NTRS)

    1997-01-01

    While workers on the ground steady the craft with guy ropes, workers atop a high-lift truck align the mounting plates as an F/A-18 Hornet airplane formerly flown by NASA's Dryden Flight Research Center is mounted on a 28-foot-tall pedestal in front of the municipal baseball stadium in the city of Lancaster, California. The aircraft was loaned to the city for pulbic display after its recent retirement by Dryden, which is located at nearby Edwards, California. The blue-and-white twin-jet aircraft was flown as a safety chase and support aircraft by NASA Dryden for about nine years before being retired. Known as 'The Hangar,' the stadium is the home field of the Lancaster Jethawks, a Class-A farm team of the Seattle Mariners.

  3. Robots in design (Panel Discussion)

    Microsoft Academic Search

    Ernest L. Hall

    1983-01-01

    The purpose of this panel is to discuss the significant new tool that designers now have available for automating many tasks now performed manually. This tool is the robot. Robots are universal manipulators. They are programmable, multifunctional, and have already been applied to a variety of tasks from playing checkers and decorating candy to spray painting, welding, and even ship

  4. Learning Physics with Physical Panels.

    ERIC Educational Resources Information Center

    Syurin, O.; Shulik, B.

    2000-01-01

    Presents two components of a piece of experimental equipment, the optical training ground and the electrical panel, which can be used to construct and test different electrical circuits and study laws of electricity, experimental problem solving, and basic light phenomena. (YDS)

  5. Peg supported thermal insulation panel

    DOEpatents

    Nowobilski, J.J.; Owens, W.J.

    1985-04-30

    A thermal insulation panel which is lightweight, load bearing, accommodates thermal stress, and has excellent high temperature insulation capability comprises high performance insulation between thin metal walls supported by high density, high strength glass pegs made in compliance with specified conditions of time, temperature and pressure. 2 figs.

  6. Peg supported thermal insulation panel

    DOEpatents

    Nowobilski, Jeffert J. (Orchard Park, NY); Owens, William J. (Kenmore, NY)

    1985-01-01

    A thermal insulation panel which is lightweight, load bearing, accommodates thermal stress, and has excellent high temperature insulation capability comprising high performance insulation between thin metal walls supported by high density, high strength glass pegs made in compliance with specified conditions of time, temperature and pressure.

  7. ASIST 2003: Part II: Panels.

    ERIC Educational Resources Information Center

    Proceedings of the ASIST Annual Meeting, 2003

    2003-01-01

    Forty-six panels address topics including women in information science; users and usability; information studies; reference services; information policies; standards; interface design; information retrieval; information networks; metadata; shared access; e-commerce in libraries; knowledge organization; information science theories; digitization;…

  8. Panel: RFID Security and Privacy

    NASA Astrophysics Data System (ADS)

    Fu, Kevin

    The panel on RFID security and privacy included Ross Anderson, Jon Callas, Yvo Desmedt, and Kevin Fu. Topics for discussion included the "chip and PIN" EMV payment systems, e-Passports, "mafia" attacks, and RFID-enabled credit cards. Position papers by the panelists appear in the following pages, and the RFID-enabled credit card work appears separately in these proceedings.

  9. WWW 2007 -Panel Susan Dumais

    E-print Network

    Dumais, Susan

    ;WWW 2007 - Panel Stuff IStuff I''ve Seen (SIS)ve Seen (SIS) Personal content "stuff you've seen" Finding vs. Re-finding (e.g., file, web, memory) Unified access to stuff you've seen Many types of info (e Experiences Stuff I've Seen (SIS) - Research prototype system ~3000 internal Microsoft users Analyzed: Free

  10. Corrugated panels under dynamic loads

    Microsoft Academic Search

    Y. H. Liang; L. A. Louca; R. E. Hobbs

    2007-01-01

    Corrugated panels are commonly used as blast walls on offshore installations, and an assessment of their response to dynamic pressure loads needs to be made during design. Although detailed numerical models are commonly used, simplified models based on spring-mass idealisations, such as Biggs’ method, are still important for preliminary design. Based on an earlier static formulation, the dynamic response of

  11. Striking Panel Touch Location Detect

    Microsoft Academic Search

    Chin-Yu Wang; Hon-Ta Liu; Shih-Yu Shen

    2012-01-01

    Recently, there are more touch panels that have been extensively used throughout the world. Due to customer input regarding improvements, we have examined the use of technology of touch products. In the market, most of touch monitors used by finger or touch pen get the electricity, capacity effect, or stop sensor signal. From the signal orientates the controller, lots of

  12. Thin film concentrator panel development

    Microsoft Academic Search

    D. K. Zimmerman

    1982-01-01

    The development and testing of a rigid panel concept that utilizes a thin film reflective surface for application to a low-cost point-focusing solar concentrator is discussed. It is shown that a thin film reflective surface is acceptable for use on solar concentrators, including 1500 F applications. Additionally, it is shown that a formed steel sheet substrate is a good choice

  13. Solar Panel of Photovoltaic Cells

    USGS Multimedia Gallery

    Solar panels or arrays of photovoltaic cells convert renewable solar radiation into electricity by a clean and environmentally sound means. Collected solar energy can either be used instantly or stored in batteries for later use. These systems can be used as a component of a larger photovoltaic syst...

  14. Distribution of melt beneath Mount St Helens and Mount Adams inferred from magnetotelluric data

    USGS Publications Warehouse

    Hill, G.J.; Caldwell, T.G.; Heise, W.; Chertkoff, D.G.; Bibby, H.M.; Burgess, M.K.; Cull, J.P.; Cas, Ray A.F.

    2009-01-01

    Three prominent volcanoes that form part of the Cascade mountain range in Washington State (USA)Mounts StHelens, Adams and Rainierare located on the margins of a mid-crustal zone of high electrical conductivity1,5. Interconnected melt can increase the bulk conductivity of the region containing the melt6,7, which leads us to propose that the anomalous conductivity in this region is due to partial melt associated with the volcanism. Here we test this hypothesis by using magnetotelluric data recorded at a network of 85 locations in the area of the high-conductivity anomaly. Our data reveal that a localized zone of high conductivity beneath thisvolcano extends downwards to join the mid-crustal conductor. As our measurements were made during the recent period of lava extrusion at Mount St Helens, we infer that the conductivity anomaly associated with the localized zone, and by extension with the mid-crustal conductor, is caused by the presence of partial melt. Our interpretation is consistent with the crustal origin of silicic magmas erupting from Mount St Helens8, and explains the distribution of seismicity observed at the time of the catastrophic eruption in 1980 (refs9, 10). ?? 2009 Macmillan Publishers Limited. All rights reserved.

  15. Distribution of melt beneath Mount St Helens and Mount Adams inferred from magnetotelluric data

    NASA Astrophysics Data System (ADS)

    Hill, Graham J.; Caldwell, T. Grant; Heise, Wiebke; Chertkoff, Darren G.; Bibby, Hugh M.; Burgess, Matt K.; Cull, James P.; Cas, Ray A. F.

    2009-11-01

    Three prominent volcanoes that form part of the Cascade mountain range in Washington State (USA)-Mounts St Helens, Adams and Rainier-are located on the margins of a mid-crustal zone of high electrical conductivity. Interconnected melt can increase the bulk conductivity of the region containing the melt, which leads us to propose that the anomalous conductivity in this region is due to partial melt associated with the volcanism. Here we test this hypothesis by using magnetotelluric data recorded at a network of 85 locations in the area of the high-conductivity anomaly. Our data reveal that a localized zone of high conductivity beneath this volcano extends downwards to join the mid-crustal conductor. As our measurements were made during the recent period of lava extrusion at Mount St Helens, we infer that the conductivity anomaly associated with the localized zone, and by extension with the mid-crustal conductor, is caused by the presence of partial melt. Our interpretation is consistent with the crustal origin of silicic magmas erupting from Mount St Helens, and explains the distribution of seismicity observed at the time of the catastrophic eruption in 1980 (refs 9, 10).

  16. 21 CFR 660.3 - Reference panel.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...FOR LABORATORY TESTS Antibody to Hepatitis B Surface Antigen § 660.3 Reference panel. A Reference Hepatitis B Surface Antigen Panel shall...potency and specificity of Antibody to Hepatitis B Surface Antigen. [40 FR...

  17. Testing panels in tension and flexure

    NASA Technical Reports Server (NTRS)

    Jing, G. K.

    1981-01-01

    Simple jig adapts tensile test machine for simulataneous application of tension and flexure, for evaluating panel composition, processing, and design. Environmental test chamber can be added so that panel properties can be measured at extreme temperatures.

  18. 14 CFR 1259.600 - Panel description.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 false Panel description. 1259.600 Section 1259.600 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION NATIONAL SPACE GRANT COLLEGE AND FELLOWSHIP PROGRAM Space Grant Review Panel § 1259.600...

  19. 14 CFR 1259.600 - Panel description.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 false Panel description. 1259.600 Section 1259.600 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION NATIONAL SPACE GRANT COLLEGE AND FELLOWSHIP PROGRAM Space Grant Review Panel § 1259.600...

  20. 14 CFR 1259.600 - Panel description.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2010-01-01 true Panel description. 1259.600 Section 1259.600 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION NATIONAL SPACE GRANT COLLEGE AND FELLOWSHIP PROGRAM Space Grant Review Panel § 1259.600...

  1. 14 CFR 1259.600 - Panel description.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 false Panel description. 1259.600 Section 1259.600 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION NATIONAL SPACE GRANT COLLEGE AND FELLOWSHIP PROGRAM Space Grant Review Panel § 1259.600...

  2. 14 CFR 1259.600 - Panel description.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...2013-01-01 false Panel description. 1259.600 Section 1259.600 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION NATIONAL SPACE GRANT COLLEGE AND FELLOWSHIP PROGRAM Space Grant Review Panel § 1259.600...

  3. 21 CFR 660.3 - Reference panel.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...FOR LABORATORY TESTS Antibody to Hepatitis B Surface Antigen § 660.3 Reference panel. A Reference Hepatitis B Surface Antigen Panel shall...potency and specificity of Antibody to Hepatitis B Surface Antigen. [40 FR...

  4. 21 CFR 660.3 - Reference panel.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...FOR LABORATORY TESTS Antibody to Hepatitis B Surface Antigen § 660.3 Reference panel. A Reference Hepatitis B Surface Antigen Panel shall...potency and specificity of Antibody to Hepatitis B Surface Antigen. [40 FR...

  5. PANEL CODE FOR PLANAR CASCADES

    NASA Technical Reports Server (NTRS)

    Mcfarland, E. R.

    1994-01-01

    The Panel Code for Planar Cascades was developed as an aid for the designer of turbomachinery blade rows. The effective design of turbomachinery blade rows relies on the use of computer codes to model the flow on blade-to-blade surfaces. Most of the currently used codes model the flow as inviscid, irrotational, and compressible with solutions being obtained by finite difference or finite element numerical techniques. While these codes can yield very accurate solutions, they usually require an experienced user to manipulate input data and control parameters. Also, they often limit a designer in the types of blade geometries, cascade configurations, and flow conditions that can be considered. The Panel Code for Planar Cascades accelerates the design process and gives the designer more freedom in developing blade shapes by offering a simple blade-to-blade flow code. Panel, or integral equation, solution techniques have been used for several years by external aerodynamicists who have developed and refined them into a primary design tool of the aircraft industry. The Panel Code for Planar Cascades adapts these same techniques to provide a versatile, stable, and efficient calculation scheme for internal flow. The code calculates the compressible, inviscid, irrotational flow through a planar cascade of arbitrary blade shapes. Since the panel solution technique is for incompressible flow, a compressibility correction is introduced to account for compressible flow effects. The analysis is limited to flow conditions in the subsonic and shock-free transonic range. Input to the code consists of inlet flow conditions, blade geometry data, and simple control parameters. Output includes flow parameters at selected control points. This program is written in FORTRAN IV for batch execution and has been implemented on an IBM 370 series computer with a central memory requirement of approximately 590K of 8 bit bytes. This program was developed in 1982.

  6. X-38 Mounted on Pylon of B-52 Mothership

    NASA Technical Reports Server (NTRS)

    1997-01-01

    A close-up view of the X-38 research vehicle mounted under the wing of the B-52 mothership prior to a 1997 test flight. The X-38, which was designed to help develop technology for an emergency crew return vehicle (CRV) for the International Space Station, is one of many research vehicles the B-52 has carried aloft over the past 40 years. NASA B-52, Tail Number 008, is an air launch carrier aircraft, 'mothership,' as well as a research aircraft platform that has been used on a variety of research projects. The aircraft, a 'B' model built in 1952 and first flown on June 11, 1955, is the oldest B-52 in flying status and has been used on some of the most significant research projects in aerospace history. Some of the significant projects supported by B-52 008 include the X-15, the lifting bodies, HiMAT (highly maneuverable aircraft technology), Pegasus, validation of parachute systems developed for the space shuttle program (solid-rocket-booster recovery system and the orbiter drag chute system), and the X-38. The B-52 served as the launch vehicle on 106 X-15 flights and flew a total of 159 captive-carry and launch missions in support of that program from June 1959 to October 1968. Information gained from the highly successful X-15 program contributed to the Mercury, Gemini, and Apollo human spaceflight programs as well as space shuttle development. Between 1966 and 1975, the B-52 served as the launch aircraft for 127 of the 144 wingless lifting body flights. In the 1970s and 1980s, the B-52 was the launch aircraft for several aircraft at what is now the Dryden Flight Research Center, Edwards, California, to study spin-stall, high-angle-of attack, and maneuvering characteristics. These included the 3/8-scale F-15/spin research vehicle (SRV), the HiMAT (Highly Maneuverable Aircraft Technology) research vehicle, and the DAST (drones for aerodynamic and structural testing). The aircraft supported the development of parachute recovery systems used to recover the space shuttle solid rocket booster casings. It also supported eight orbiter (space shuttle) drag chute tests in 1990. In addition, the B-52 served as the air launch platform for the first six Pegasus space boosters. During its many years of service, the B-52 has undergone several modifications. The first major modification was made by North American Aviation (now part of Boeing) in support of the X-15 program. This involved creating a launch-panel-operator station for monitoring the status of the test vehicle being carried, cutting a large notch in the right inboard wing flap to accommodate the vertical tail of the X-15 aircraft, and installing a wing pylon that enables the B-52 to carry research vehicles and test articles to be air-launched/dropped. Located on the right wing, between the inboard engine pylon and the fuselage, this wing pylon was subjected to extensive testing prior to its use. For each test vehicle the B-52 carried, minor changes were made to the launch-panel operator's station. Built originally by the Boeing Company, the NASA B-52 is powered by eight Pratt & Whitney J57-19 turbojet engines, each of which produce 12,000 pounds of thrust. The aircraft's normal launch speed has been Mach 0.8 (about 530 miles per hour) and its normal drop altitude has been 40,000 to 45,000 feet. It is 156 feet long and has a wing span of 185 feet. The heaviest load it has carried was the No. 2 X-15 aircraft at 53,100 pounds. Project manager for the aircraft is Roy Bryant.

  7. Investigating Mount Cameroon's Magma Chamber System

    NASA Astrophysics Data System (ADS)

    Riley, S. D.; Clarke, A.; Watts, R.; Suh, C. E.

    2005-12-01

    Mount Cameroon, located in the middle of the Cameroon Volcanic Line (CVL) on the passive western margin of Cameroon, is one of Africa's most active volcanoes with seven eruptions in the past century. Many population centers are in lava flow hazard zones, making monitoring imperative. Despite its high activity level, monitoring is limited to a small network of seismometers, and only one instrument was functional immediately before the 1999 eruption. Seismic activity rose above background level only a few days prior to the eruption (Suh, et al.,2003, Bull. Volcanol., 65:267-281). In order to improve spatial coverage and potential warning time, we are designing a ground deformation monitoring network. Using existing seismic, petrologic, and historical eruption data (Ambeh,1989, PhD thesis, Leeds U., UK; Suh et al. 2003) along with corresponding models of subsurface magma storage, we apply simple elastic half-space models (Mogi, 1958; Pinel and Jaupart, 2000) to explore the nature of the volcano's plumbing system. We first assumed a closed-system and a 12km deep chamber (Ambeh, 1989), with sufficient overpressure to initiate the 1999 eruption. Given the total erupted volume of 8 x 108 m3 and the required pressure, the chamber must be ~1.2 km in diameter. Overpressure in this chamber immediately prior to eruption causes maximum surface tilt of ~0.3 microradians at 6km from the center. This small amount of deformation is not detectable by surface mounted tiltmeters, however it is detectable by borehole strainmeters. Following conduit initiation, at an average extrusion rate of 40m3 s-1 recorded for the 1999 eruption (Suh et al., 2003) and assuming a 10m radius conduit, magma would erupt roughly one full day after conduit initiation. However, if the system fills a shallow chamber at ~3km depth prior to eruption, as is the case in Hawaiian volcanoes (Dvorak & Okamura, 1987), then maximum surface tilt of ~17 microradians occurs at 1.5km from the center, making eruption prediction with tiltmeters feasible. At a 40m3 s-1 chamber filling rate, the shallow chamber would take nearly a month to reach an eruptible pressure, providing two weeks of warning with tiltmeters.

  8. Lightweight composites for modular panelized construction

    NASA Astrophysics Data System (ADS)

    Vaidya, Amol S.

    Rapid advances in construction materials technology have enabled civil engineers to achieve impressive gains in the safety, economy, and functionality of structures built to serve the common needs of society. Modular building systems is a fast-growing modern, form of construction gaining recognition for its increased efficiency and ability to apply modern technology to the needs of the market place. In the modular construction technique, a single structural panel can perform a number of functions such as providing thermal insulation, vibration damping, and structural strength. These multifunctional panels can be prefabricated in a manufacturing facility and then transferred to the construction site. A system that uses prefabricated panels for construction is called a "panelized construction system". This study focuses on the development of pre-cast, lightweight, multifunctional sandwich composite panels to be used for panelized construction. Two thermoplastic composite panels are proposed in this study, namely Composite Structural Insulated Panels (CSIPs) for exterior walls, floors and roofs, and Open Core Sandwich composite for multifunctional interior walls of a structure. Special manufacturing techniques are developed for manufacturing these panels. The structural behavior of these panels is analyzed based on various building design codes. Detailed descriptions of the design, cost analysis, manufacturing, finite element modeling and structural testing of these proposed panels are included in this study in the of form five peer-reviewed journal articles. The structural testing of the proposed panels involved in this study included flexural testing, axial compression testing, and low and high velocity impact testing. Based on the current study, the proposed CSIP wall and floor panels were found satisfactory, based on building design codes ASCE-7-05 and ACI-318-05. Joining techniques are proposed in this study for connecting the precast panels on the construction site. Keywords: Modular panelized construction, sandwich composites, composite structural insulated panels (CSIPs).

  9. Silicone-Rubber Tooling for Hollow Panels

    NASA Technical Reports Server (NTRS)

    Gallimore, F. H.

    1985-01-01

    Wave-free contour surface obtained by using flexible mold. Silicone-rubber layup tool, when used in conjunction with hard plastic laminating mold defining desired contour, produces panel with wave-free surface that accurately reproduces shape of mold. In addition to providing porous hollow-panel wing structure that acts as duct for transporting sucked boundary layer tooling, also used to fabricate high-strength lightweight door panels and any single-or compound-contour panel.

  10. A detailed survey near Mount Eratosthenes Eastern Mediterranean

    Microsoft Academic Search

    S. J. Tanner; C. A. Williams

    1984-01-01

    A detailed marine survey made to the South West of Mount Eratosthenes is described. The results show the existence of a narrow zone of WNW trending deformed sediment west of the mount surrounded by an evaporite sequence in different stages of deformation.

  11. AERIAL VIEW, LAUREL HILL CEMETERY (LEFT) AND MOUNT PEACE CEMETERY ...

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

    AERIAL VIEW, LAUREL HILL CEMETERY (LEFT) AND MOUNT PEACE CEMETERY (RIGHT). LOCATED ACROSS RIDGE AVENUE FROM LAUREL HILL CEMETERY, MOUNT PEACE CEMETERY WAS FOUNDED BY THE ODD FELLOWS CEMETERY COMPANY IN 1865. - Laurel Hill Cemetery, 3822 Ridge Avenue, Philadelphia, Philadelphia County, PA

  12. The CF6 jet engine performance improvement: New front mount

    NASA Technical Reports Server (NTRS)

    Fasching, W. A.

    1979-01-01

    The New Front Mount was evaluated in component tests including stress, deflection/distortion and fatigue tests. The test results demonstrated a performance improvement of 0.1% in cruise sfc, 16% in compressor stall margin and 10% in compressor stator angle margin. The New Front Mount hardware successfully completed 35,000 simulated flight cycles endurance testing.

  13. ORIGINAL PAPER Water diffusion in Mount Changbai peralkaline rhyolitic melt

    E-print Network

    Zhang, Youxue

    ORIGINAL PAPER Water diffusion in Mount Changbai peralkaline rhyolitic melt Haoyue Wang Æ Zhengjiu in a peralkaline rhyolitic melt with major oxide concentrations matching Mount Changbai rhyolite. Combining data from this work and a related study, total water diffusivity in peralkaline rhyolitic melt can

  14. Forest development following mudflow deposition, Mount St. Helens, Washington

    E-print Network

    Franklin, Jerry

    Forest development following mudflow deposition, Mount St. Helens, Washington Marc H. Weber, Keith eruption of Mount St. Helens using permanent plot data collected along two transects traversing the Cedar'éruption du mont Saint Helens en 1980 à l'aide des données provenant de placettes-échantillons permanentes et

  15. Accelerometer mounting considerations for high frequency vibration measurements

    NASA Astrophysics Data System (ADS)

    Insalaco, Michael D.

    The mounting requirements of MIL-STD-740-2, Structureborne Vibratory Acceleration Measurements and Acceptance Criteria of Shipboard Equipment, regarding accelerometer attachment are reviewed. Conditions of accelerometer factory calibration required for accurate high-frequency measurement are discussed. Test results, using prescribed mounting conditions, are presented which demonstrate accelerometer attachment influences on the system response.

  16. Optimal design of engine mount using an artificial life algorithm

    Microsoft Academic Search

    Young Kong Ahn; Jin Dae Song; Bo-Suk Yang

    2003-01-01

    When designing fluid mounts, design parameters can be varied in order to obtain a desired notch frequency and notch depth. The notch frequency is a function of the mount parameters and is typically selected by the designer to occur at the vibration disturbance frequency. Since the process of choosing these parameters can involve some trial and error, it seems to

  17. Alternative mounting media for preservation of some protozoa.

    PubMed

    Criado-Fornelio, A; Heredero-Bermejo, I; Pérez-Serrano, J

    2014-10-01

    Protozoa resistant stages are disintegrated when mounted in toluene-based media. To overcome such problem, three toluene-free mountants were tested on preserve Acanthamoeba spp and gregarines. Two commercial glues based on cyanoacrylate or trimethoxysilane were suitable for preserving both cysts and trophozoites. Hoyer's medium showed good results for mounting gregarine oocysts. PMID:25091186

  18. 9. Map of Fort Funston, 1939 with Panama Mounts located ...

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

    9. Map of Fort Funston, 1939 with Panama Mounts located at center beneath the letter "O" in Ocean, by U.S. Engineering Office, San Francisco, California August 5, 1934. - Fort Funston, Panama Mounts for 155mm Guns, Skyline Boulevard & Great Highway, San Francisco, San Francisco County, CA

  19. Volcanic fire and glacial ice: Mount Rogers National Recreation Area

    USGS Publications Warehouse

    U.S. Geological Survey; U.S. Forest Service

    2007-01-01

    In addition to containing the highest point in Virginia (Mount Rogers, elevation 5,729 feet), the Mount Rogers National Recreation Area (NRA) of the Jefferson National Forest is a window on the history of ancient volcanic eruptions and glacial movement.

  20. The CRRES high efficiency solar panel

    Microsoft Academic Search

    Terry M. Trumble

    1991-01-01

    The purpose of the High Efficiency Solar Panel (HESP) experiment is to provide both engineering and scientific information concerning the effects of space radiation on advanced gallium arsenide (GaAs) solar cells. The HESP experiment consists of an ambient panel, an annealing panel, and a programmable load. This experiment, in conjunction with the radiation measurement experiments aboard the CRRES, provides the

  1. Method of manufacture of solar cell panel

    Microsoft Academic Search

    J. S. Walker; W. C. Kittler

    1978-01-01

    There is described a solar cell panel consisting of an outer rigid transparent faceply of glass or plastic material to which are applied at least two layers of plastic such as polyvinyl butyral between which are positioned a plurality of solar cell wafers. A thin flexible film of polyethylene terephthalate forms the other outer surface of the panel. The panel

  2. Helmet-Mounted Display Design Guide

    NASA Technical Reports Server (NTRS)

    Newman, Richard L.; Greeley, Kevin W.

    1997-01-01

    Helmet Mounted Displays (HMDs) present flight, navigation, and weapon information in the pilot's line of sight. The HMD was developed to allow the pilot to retain aircraft and weapon information while looking off boresight. This document reviews current state of the art in HMDs and presents a design guide for the HMD engineer in identifying several critical HMD issues: symbol stabilization, inadequate definitions, undefined symbol drive laws, helmet considerations, and Field Of View (FOV) vs. resolution tradeoff requirements. In particular, display latency is a key issue for HMDs. In addition to requiring further experimental studies, it impacts the definition and control law issues. Symbol stabilization is also critical. In the case of the Apache helicopter, the lack of compensation for pilot head motion creates excessive workload during hovering and Nap Of the Earth (NOE) flight. This translates into excessive training requirements. There is no agreed upon set of definitions or descriptions for how HMD symbols are driven to compensate for pilot head motion. A set of definitions is proposed to address this. There are several specific areas where simulation and flight experiments are needed: development of hover and NOE symbologies which compensate for pilot head movement; display latency and sampling, and the tradeoff between FOV, sensor resolution and symbology.

  3. Potential climate impact of Mount Pinatubo eruption

    NASA Technical Reports Server (NTRS)

    Hansen, James; Lacis, Andrew; Ruedy, Reto; Sato, Makiko

    1992-01-01

    The GISS global-climate model is used to make a preliminary estimate of Mount Pinatubo's climate impact. Assuming the aerosol optical depth is nearly twice as great as for the 1982 El Chichon eruption, the model forecasts a dramatic but temporary break in recent global warming trends. The simulations indicate that Pinatubo occurred too late in the year to prevent 1991 from becoming one of the warmest years in instrumental records, but intense aerosol cooling is predicted to begin late in 1991 and to maximize late in 1992. The predicted cooling is sufficiently large that by mid 1992 it should even overwhelm global warming associated with an El Nino that appears to be developing, but the El Nino could shift the time of minimum global temperature into 1993. The model predicts a return to record warm levels in the later 1990s. The effect is estimated of the predicted global cooling on such practical matters as the severity of the coming Soviet winter and the dates of cherry blossoming next spring.

  4. Nd:YAG breech mounted laser igniter

    NASA Astrophysics Data System (ADS)

    Hardy, Christopher R.; Myers, Michael J.; Myers, John D.; Gadson, Robert L.; Leone, Joseph; Fay, Josiah W.; Boyd, Kevin

    2005-09-01

    Nd:YAG lasers have been successfully used to demonstrate laser ignition of howitzer propellant charges including bag, stick, and the Modular Artillery Charge System (MACS). Breech Mount Laser Ignition Systems (BMLIS) have been designed, installed and tested on many artillery systems, including the US Army's M109A6 Paladin, M198, M777 Light Weight, Crusader, and Non-Line-of-Sight Cannon (NLOS-C). The NLOS-C incorporates advanced weapon technologies, to include a BMLIS. United Defense's Armament Systems Division has recently designed and built a NLOS-C System Demonstrator that uses a BMLIS that incorporates Kigre's patented square pulse technology. NLOS-C is one of the weapon systems being developed for use with the US Army's "systems of systems" Future Combat System (FCS), Manned Ground Vehicles (MGV) program, and is currently undergoing development testing at Yuma Proving Grounds. In this paper we discuss many technical aspects of an artillery laser ignition system and present BMLIS test data obtained from actual gun firings conducted with a number of different US Army howitzer platforms.

  5. Electro-optic component mounting device

    DOEpatents

    Gruchalla, Michael E. (Albuquerque, NM)

    1994-01-01

    A technique is provided for integrally mounting a device such as an electro-optic device (50) in a transmission line to avoid series resonant effects. A center conductor (52) of the transmission line has an aperture (58) formed therein for receiving the device (50). The aperture (58) splits the center conductor into two parallel sections on opposite sides of the device. For a waveguide application, the center conductor is surrounded by a conductive ground surface (54), which is spaced apart from the center conductor with a dielectric material (56). One set of electrodes formed on the surface of the electro-optic device (50) is directly connected to the center conductor 52 and an electrode formed on the surface of the electro-optic device is directly connected to the conductive ground surface (54). The electrodes formed on the surface of the electro-optic device are formed on curved sections of the surface of the device to mate with correspondingly shaped electrodes on the conductor and ground surface to provide a uniform electric field across the electro-optic device. The center conductor includes a passage ( 60) formed therein for passage of optical signals to an electro-optic device.

  6. Laser housing having integral mounts and method of manufacturing same

    DOEpatents

    Herron, Michael Alan; Brickeen, Brian Keith

    2004-10-19

    A housing adapted to position, support, and facilitate aligning various components, including an optical path assembly, of a laser. In a preferred embodiment, the housing is constructed from a single piece of material and broadly comprises one or more through-holes; one or more cavities; and one or more integral mounts, wherein the through-holes and the cavities cooperate to define the integral mounts. Securement holes machined into the integral mounts facilitate securing components within the integral mounts using set screws, adhesive, or a combination thereof. In a preferred method of making the housing, the through-holes and cavities are first machined into the single piece of material, with at least some of the remaining material forming the integral mounts.

  7. Purging of a tank-mounted multilayer insulation system by gas diffusion

    NASA Technical Reports Server (NTRS)

    Sumner, I. E.

    1978-01-01

    The investigation was conducted on a multilayer insulation (MLI) system mounted on a spherical liquid hydrogen propellant tank. The MLI consisted of two blankets of insulation each containing 15 double-aluminized Mylar radiation shields separated by double silk net spacers. The gaseous nitrogen initially contained within the MLI system and vacuum chamber was purged with gaseous helium introduced both underneath the MLI and into the vacuum chamber. The MLI panels were assumed to be purged primarily by means of gas diffusion. Overall, test results indicated that nitrogen concentrations well below 1 percent could be achieved everywhere within the MLI system. Typical times to achieve 1 percent nitrogen concentration within the MLI panels ranged from 69 minutes at the top of the tank to 158 minutes at the bottom of the tank. Four space-hold thermal performance tests indicated no significant thermal degradation of the MLI system had occurred due to the purge tests conducted. The final measured heat input attributed to the MLI was 7.23 watts as compared to 7.18 watts for the initial baseline thermal performance test.

  8. Elastic Coupling Effects in Tapered Sandwich Panels with Laminated

    E-print Network

    Vel, Senthil

    Elastic Coupling Effects in Tapered Sandwich Panels with Laminated Anisotropic Composite Facings theory for the analysis of tapered sandwich panels with laminated anisotropic facings is presented. Unlike sandwich panels of uniform depth, the response of tapered sandwich panels is counterintuitive

  9. High Efficiency, High Density Terrestrial Panel. [for solar cell modules

    NASA Technical Reports Server (NTRS)

    Wohlgemuth, J.; Wihl, M.; Rosenfield, T.

    1979-01-01

    Terrestrial panels were fabricated using rectangular cells. Packing densities in excess of 90% with panel conversion efficiencies greater than 13% were obtained. Higher density panels can be produced on a cost competitive basis with the standard salami panels.

  10. 10 CFR 800.102 - Review by Application Evaluation Panel.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...false Review by Application Evaluation Panel. 800.102 Section...102 Review by Application Evaluation Panel. (a) Applications...reviewed by an Application Evaluation Panel, which shall be...the Panel shall arrange for risk analysis, independent...

  11. Structural and Acoustic Numerical Modeling of a Curved Composite Honeycomb Panel

    NASA Technical Reports Server (NTRS)

    Grosveld, Ferdinand W.; Buehrle, Ralph D.; Robinson, Jay H.

    2001-01-01

    The finite and boundary element modeling of the curved section of a composite honeycomb aircraft fuselage sidewall was validated for both structural response and acoustic radiation. The curved panel was modeled in the pre-processor MSC/PATRAN. Geometry models of the curved panel were constructed based on the physical dimensions of the test article. Material properties were obtained from the panel manufacturer. Finite element models were developed to predict the modal parameters for free and supported panel boundary conditions up to a frequency of 600 Hz. Free boundary conditions were simulated by providing soft foam support under the four comers of the panel or by suspending the panel from elastic bands. Supported boundary conditions were obtained by clamping the panel between plastic tubing seated in grooves along the perimeter of a stiff and heavy frame. The frame was installed in the transmission loss window of the Structural Acoustic Loads and Transmission (SALT) facility at NASA Langley Research Center. The structural response of the curved panel due to point force excitation was predicted using MSC/NASTRAN and the radiated sound was computed with COMET/Acoustics. The predictions were compared with the results from experimental modal surveys and forced response tests on the fuselage panel. The finite element models were refined and updated to provide optimum comparison with the measured modal data. Excellent agreement was obtained between the numerical and experimental modal data for the free as well as for the supported boundary conditions. Frequency response functions (FRF) were computed relating the input force excitation at one panel location to the surface acceleration response at five panel locations. Frequency response functions were measured at the same locations on the test specimen and were compared with the calculated FRF values. Good agreement was obtained for the real and imaginary parts of the transfer functions when modal participation was allowed up to 3000 Hz. The validated finite element model was used to predict the surface velocities due to the point force excitation. Good agreement was obtained between the spatial characteristics of the predicted and measured surface velocities. The measured velocity data were input into the acoustic boundary element code to compute the sound radiated by the panel. The predicted sound pressure levels in the far-field of the panel agreed well with the sound pressure levels measured at the same location.

  12. 78 FR 41937 - Joint Meeting of the Gastroenterology-Urology Panel and the Radiological Devices Panel of the...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-12

    ...FDA-2013-N-0816] Joint Meeting of the Gastroenterology-Urology Panel and the Radiological Devices Panel of the Medical Devices...open to the public. Name of Committee: Gastroenterology-Urology Panel and Radiological Devices Panel of the Medical...

  13. Digital Array Radar panel development

    Microsoft Academic Search

    William Chappell; Caleb Fulton

    2010-01-01

    The Army Digital Array Radar (DAR) project's goal is to demonstrate how wide-bandgap semiconductor technology, highly-integrated transceivers, and the ever-increasing capabilities of commercial digital components can be leveraged to provide new capabilities and enhanced performance in future low-cost phased array systems. A 16-element, S-band subarray has been developed with panel-integrated, plastic-packaged gallium-nitride (GaN) amplifiers, multi-channel transceiver ICs, and digitization at

  14. Emissions and Noise Pervasive Panel

    NASA Technical Reports Server (NTRS)

    Henderson, Brenda; Lee, Chi

    2008-01-01

    Objectives include: Provide interagency coordination of technology development, aimed at engine noise reduction. a) Provide recommendations to the Steering Committee on potential areas of interagency technology collaboration to maximize the use of government investments in noise reduction. b) Serve as a forum for information and technology exchange in order to coordinate gas turbine engine environmental strategies and policies among the member agencies and industry; c) Coordinate activities across panel representatives; and d) Communicate progress to VAATE steering committee.

  15. Panel 4 - applications to transportation

    SciTech Connect

    Nichols, F. [Argonne National Lab., IL (United States); Au, J. [Sundstrand Aerospace, Rockford, IL (United States); Bhattacharya, R. [Universal Energy Systems, Inc., Dayton, OH (United States); Bhushan, B. [Ohio State Univ., Columbus (United States); Blunier, D. [Caterpillar, Inc., Peoria, IL (United States); Boardman, B. [Deere & Co., Moline, IL (United States); Brombolich, L. [Compu-Tec Engineering, Chesterfield, MO (United States); Davidson, J. [Vanderbilt Univ., Nashville, TN (United States); Graham, M. [Northwestern Univ., Evanston, IL (United States); Hakim, N. [Detroit Diesel Corp., MI (United States); Harris, K. [Dubbeldee Harris Diamond Corp., Mt. Arlington, NJ (United States); Hay, R. [Norton Diamond Film, Northboro, MA (United States); Herk, L. [Southwest Research Inst., Southfield, MI (United States); Hojnacki, H.; Rourk, D. [Intelligent Structures Incorporated, Canton, MI (United States); Kamo, R. [Adiabatics, Inc., Columbus, IN (United States); Nieman, B. [Allied-Signal Inc., Des Plaines, IL (United States); O`Neill, D. [3M, St. Paul, MN (United States); Peterson, M.B. [Wear Sciences, Arnold, MD (United States); Pfaffenberger, G. [Allison Gas Turbine, Indianapolis, IN (United States); Pryor, R.W. [Wayne State Univ., Detroit, MI (United States); Russell, J. [Superconductivity Publications, Inc., Somerset, NJ (United States); Syniuta, W. [Advanced Mechanical Technology, Inc., Newton, MA (United States); Tamor, M. [Ford Motor Co., Dearborn, MI (United States); Vojnovich, T. [Dept. of Energy, Washington, DC (United States); Yarbrough, W. [Pennsylvania State Univ., University Park (United States); Yust, C.S. [Oak Ridge National Lab., TN (United States)

    1993-01-01

    The aim of this group was to compile a listing of current and anticipated future problem areas in the transportation industry where the properties of diamond and DLC films make them especially attractive and where the panel could strongly endorse the establishment of DOE/Transportation Industry cooperative research efforts. This section identifies the problem areas for possible applications of diamond/DLC technology and presents indications of current approaches to these problems.

  16. Flat panel planar optic display

    SciTech Connect

    Veligdan, J.T. [Brookhaven National Lab., Upton, NY (United States). Dept. of Advanced Technology

    1994-11-01

    A prototype 10 inch flat panel Planar Optic Display, (POD), screen has been constructed and tested. This display screen is comprised of hundreds of planar optic class sheets bonded together with a cladding layer between each sheet where each glass sheet represents a vertical line of resolution. The display is 9 inches wide by 5 inches high and approximately 1 inch thick. A 3 milliwatt HeNe laser is used as the illumination source and a vector scanning technique is employed.

  17. Retired NASA F-18 being mounted on pedestal mount at Lancaster California Municipal Baseball Stadium

    NASA Technical Reports Server (NTRS)

    1997-01-01

    An F/A-18 Hornet aircraft formerly flown by NASA's Dryden Flight Research Center, Edwards, California, is sandwiched between two groups of workers as they mount it atop a pedestal at the municipal baseball stadium in the city of Lancaster, California. NASA Dryden had flown the blue-and-white twin-jet as a safety chase and support aircraft for about nine years prior to its recent retirement. The aircraft is now in loan to the city for public display. Known as 'The Hangar,' the stadium is the home field of the Lancaster Jethawks, a Class-A farm team of the Seattle Mariners.

  18. Retired NASA F-18 being mounted on pedestal mount at Lancaster California Municipal Baseball Stadium

    NASA Technical Reports Server (NTRS)

    1997-01-01

    Workers carefully align a mounting bracket attached to an F/A-18 Hornet aircraft with the top of a pedestal in front of the municipal baseball stadium in the city of Lancaster, California. The Blue-and-white twin-jet aircraft, formerly flown as a safety chase and support aircraft by NASA's Dryden Flight Research Center, Edwards, California, was loaned to the city for display following its recent retirement. Known as 'The Hangar,' the stadium is the home field of the Lancaster Jethawks, a Class-A farm team of the Seattle Mariners.

  19. Wrinkling Prevention Methods for Sandwich Panel Structure

    NASA Astrophysics Data System (ADS)

    Dahara, Koichiro; Sanmaru, Kazuya; Yano, Toshihiro; Noguchi, Hiroshi

    In this paper, we proposed a method for preventing the wrinkling of the facings of a sandwich panel whose outer and inner facings were at different temperatures. By using this method, the wrinkling of the outer facing of a sandwich panel structure, such as a sandwich panel refrigerator box, could be prevented. In order to prevent the facings of the structure from wrinkling, it was necessary to determine the wrinkling strength using a compressive test, and to reduce the thermal stress of the sandwich panel structure to less than the wrinkling strength. It was observed that a sandwich panel structure with slits in the facing reduced the thermal stress. In this study, we used sandwich panel containers to examine whether this proposed method could prevent a sandwich panel from wrinkling.

  20. Structure for mounting stabilizer in vehicle suspension

    SciTech Connect

    Tanahashi, H.

    1986-12-30

    A stabilizer construction is described for a suspension of a vehicle having a vehicle body and wheels, the suspension including a bearing means for rotationally supporting one of the wheels and a cylinder-piston type shock absorber extending along a substantially vertically arranged longitudinal axis thereof with a cylinder member thereof supporting the bearing means. A piston member extends upwardly from the cylinder member and is supported from the vehicle body. A means is included for guiding the combination of the cylinder member and the bearing means is movable up and down relative to the vehicle body for bounding and rebounding. The guiding means includes a suspension member pivotably connected to the vehicle body at one end thereof and to the combination of the cylinder member and the bearing means at another end thereof so as to apply a force to the combination of the cylinder member and the bearing means along a line extending in a longitudinal direction of the vehicle body. This is for restricting forward and rearward movement of the combination of the cylinder member and the bearing means in the longitudinal direction of the vehicle body. The stabilizer construction comprises: a stabilizer having a central bar portion mounted to the vehicle body so as to extend transversely relative to the longitudinal direction of the vehicle body and an arm portion extending from one end of the central bar portion substantially at a right angle relative thereto, a link, and a bracket extending from the combination of the cylinder member and the bearing means to a free end thereof transversely spaced from the longitudinal axis of the shock absorber.

  1. Methods and apparatus for radially compliant component mounting

    SciTech Connect

    Bulman, David Edward (Cincinnati, OH); Darkins, Jr., Toby George (Loveland, OH); Stumpf, James Anthony (Columbus, IN); Schroder, Mark S. (Greenville, SC); Lipinski, John Joseph (Simpsonville, SC)

    2012-03-27

    Methods and apparatus for a mounting assembly for a liner of a gas turbine engine combustor are provided. The combustor includes a combustor liner and a radially outer annular flow sleeve. The mounting assembly includes an inner ring surrounding a radially outer surface of the liner and including a plurality of axially extending fingers. The mounting assembly also includes a radially outer ring coupled to the inner ring through a plurality of spacers that extend radially from a radially outer surface of the inner ring to the outer ring.

  2. 1-3 piezocomposite SmartPanels

    NASA Astrophysics Data System (ADS)

    Fiore, Daniel; Gentilman, Richard L.; Pham-Nguyen, Hong; Serwatka, William J.; McGuire, Patrick T.; Near, Craig D.; Bowen, Leslie J.

    1997-05-01

    Piezocomposite SmartPanelsTM, consisting of 1-3 actuators and pressure sensors and net-shape-molded PZT accelerometers in a large area low profile panel, have been fabricated at Materials Systems Inc. and evaluated at the Naval Research Laboratory. Single layer and two-layer 100 X 100 mm SmartPanels have been tested for sensor sensitivities, actuator authority, surface displacement uniformity, and sensor-actuator coupling. Multilayer GRP circuits boards are used both as stiff faceplates and to provide electrical connections and ground planes. The SmartPanel technology has recently been scaled up to 250 X 250 mm devices. SmartPanels draw upon PZT (lead zirconate titanate) ceramic injection molding technology, which is used to produce cost-effective and robust 1-3 piezoelectric ceramic-polymer composite materials. The 1-3 materials are used extensively for SonoPanelTM transducers in a number of sensor and actuator applications. SonoPanels have been qualified for US Navy applications, based on successful completion of pressure and shock tests, and are currently being scaled up from 250 X 250 mm to 750 X 750 mm panels. Several applications for SmartPanels and SonoPanels are described, including conformable transducers, multielement arrays, pressure sensors, and velocity sensors.

  3. Energy efficiency improvements for refrigerator/freezers using prototype doors containing gas-filled panel insulating systems

    SciTech Connect

    Griffith, B.; Arasteh, D.; Tuerler, D.

    1995-01-01

    Energy efficiency improvements in domestic refrigerator/freezers, are directly influenced by the overall thermal performance of the cabinet and doors. An advanced system for reducing heat gain is Gas-Filled Panel thermal insulation technology. Gas-Filled Panels contain a low-conductivity, inert gas at atmospheric pressure and employ a reflective baffle to suppress radiation and convection within the gas. This paper presents energy use test results for a 1993 model 500 liter top mount refrigerator/freezer operated with its original doors and with a series of alternative prototype doors. Gas-Filled Panel technology was used in two types of prototype refrigerator/freezer doors. In one design, panels were used in composite with foam in standard metal door pans; this design yielded no measurable energy savings. In the other design, special polymer door pans were fitted with panels that fill nearly all of the available insulation volume; this design yielded a 6.5% increase in energy efficiency for the entire refrigerator/freezer. The EPA Refrigerator Analysis computer program has been used to predict the change in daily energy consumption with the alternative doors. The computer model also projects a 25% energy efficiency improvement for a refrigerator/freezer that would use Gas-Filled Panel insulation throughout the cabinet as well as the doors.

  4. OIKOS81:495-510. Copenhagen1998 Vesicular-arbuscular mycorrhizae influence Mount St. Helens

    E-print Network

    del Moral, Roger

    OIKOS81:495-510. Copenhagen1998 Vesicular-arbuscular mycorrhizae influence Mount St. Helens.Vesicular-arbuscularmycorrhizaeinfluence MountSt. Helenspioneerspeciesin greenhouseexperiments.- Oikos81.Twogreenhousestudiesexaminedthe roleof VAMin MountSt. Helenspioneerspeciesunderthreenutrientregimesand fourcompetitivescenarios

  5. 14 CFR 25.363 - Side load on engine and auxiliary power unit mounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 false Side load on engine and auxiliary power unit mounts. 25.363 Section... § 25.363 Side load on engine and auxiliary power unit mounts. (a) Each engine and auxiliary power unit mount and its...

  6. Piezoelectric Shunt Vibration Damping of F-15 Panel under High Acoustic Excitation

    NASA Technical Reports Server (NTRS)

    Wu, Shu-Yau; Turner, Travis L.; Rizzi, Stephen A.

    2000-01-01

    At last year's SPIE symposium, we reported results of an experiment on structural vibration damping of an F-15 underbelly panel using piezoelectric shunting with five bonded PZT transducers. The panel vibration was induced with an acoustic speaker at an overall sound pressure level (OASPL) of about 90 dB. Amplitude reductions of 13.45 and 10.72 dB were achieved for the first and second modes, respectively, using single- and multiple-mode shunting. It is the purpose of this investigation to extend the passive piezoelectric shunt-damping technique to control structural vibration induced at higher acoustic excitation levels, and to examine the controllability and survivability of the bonded PZT transducers at these high levels. The shunting experiment was performed with the Thermal Acoustic Fatigue Apparatus (TAFA) at the NASA Langley Research Center using the same F-15 underbelly panel. The TAFA is a progressive wave tube facility. The panel was mounted in one wall of the TAFA test section using a specially designed mounting fixture such that the panel was subjected to grazing-incidence acoustic excitation. Five PZT transducers were used with two shunt circuits designed to control the first and second modes of the structure between 200 and 400 Hz. We first determined the values of the shunt inductance and resistance at an OASPL of 130 dB. These values were maintained while we gradually increased the OASPL from 130 to 154 dB in 6-dB steps. During each increment, the frequency response function between accelerometers on the panel and the acoustic excitation measured by microphones, before and after shunting, were recorded. Good response reduction was observed up to the 148dB level. The experiment was stopped at 154 dB due to wire breakage from vibration at a transducer wire joint. The PZT transducers, however, were still bonded well on the panel and survived at this high dB level. We also observed shifting of the frequency peaks toward lower frequency when the OASPL was increased. Detailed experimental results will be presented.

  7. Correlation Results for a Mass Loaded Vehicle Panel Test Article Finite Element Models and Modal Survey Tests

    NASA Technical Reports Server (NTRS)

    Maasha, Rumaasha; Towner, Robert L.

    2012-01-01

    High-fidelity Finite Element Models (FEMs) were developed to support a recent test program at Marshall Space Flight Center (MSFC). The FEMs correspond to test articles used for a series of acoustic tests. Modal survey tests were used to validate the FEMs for five acoustic tests (a bare panel and four different mass-loaded panel configurations). An additional modal survey test was performed on the empty test fixture (orthogrid panel mounting fixture, between the reverb and anechoic chambers). Modal survey tests were used to test-validate the dynamic characteristics of FEMs used for acoustic test excitation. Modal survey testing and subsequent model correlation has validated the natural frequencies and mode shapes of the FEMs. The modal survey test results provide a basis for the analysis models used for acoustic loading response test and analysis comparisons

  8. Investigation of Vertical Drag and Periodic Airloads Acting on Flat Panels in a Rotor Slipstream

    NASA Technical Reports Server (NTRS)

    Makofski, Robert A; Menkick, George F

    1956-01-01

    Tests have been conducted on the Langley helicopter test tower to determine the vertical drag and pressure distributions on flat panels mounted below a helicopter rotor. Calculations of the vertical drag by use of a strip-analysis procedure outlined in the paper and the assumption of a fully contracted wake agreed well with the experimental results over the range from 0.2 to 0.64 rotor radius beneath the plane of zero flapping. The pressure increase caused by the passage of the blade over the panel is a maximum at about the 0.8 radius spanwise station. At this station, the pressure decreases from 10 times the disk loading per blade at 0.05 radius beneath the rotor plane of zero flapping to one-half of the disk loading per blade at 0.64 radius beneath the plane of zero flapping.

  9. 6. INTERIOR DETAIL OF GUN MOUNT ON TERRACE, LOOKING EAST ...

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

    6. INTERIOR DETAIL OF GUN MOUNT ON TERRACE, LOOKING EAST (1992). - Wright-Patterson Air Force Base, Area B, Building 22, Armament Laboratory & Gun Range, On flightline between Tenth & Eleventh Streets, Dayton, Montgomery County, OH

  10. FEATURE C. MACHINE GUN POSITION WITH REMNANT OF MOUNT, VIEW ...

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

    FEATURE C. MACHINE GUN POSITION WITH REMNANT OF MOUNT, VIEW FACING SOUTH-SOUTHEAST. - Naval Air Station Barbers Point, Battery-Machine Gun Positions, South of Point Cruz Road & west of Coral Sea Road, Ewa, Honolulu County, HI

  11. FEATURE B. MACHINE GUN POSITION WITH LEWIS MOUNT, VIEW FACING ...

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

    FEATURE B. MACHINE GUN POSITION WITH LEWIS MOUNT, VIEW FACING NORTHWEST. - Naval Air Station Barbers Point, Battery-Machine Gun Positions, South of Point Cruz Road & west of Coral Sea Road, Ewa, Honolulu County, HI

  12. FEATURE B. MACHINE GUN POSITION WITH LEWIS MOUNT, VIEW FACING ...

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

    FEATURE B. MACHINE GUN POSITION WITH LEWIS MOUNT, VIEW FACING NORTHWEST (with scale stick). - Naval Air Station Barbers Point, Battery-Machine Gun Positions, South of Point Cruz Road & west of Coral Sea Road, Ewa, Honolulu County, HI

  13. 2. DETAIL OF CEILING MOUNTED EXHAUST FAN USED TO REMOVE ...

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

    2. DETAIL OF CEILING MOUNTED EXHAUST FAN USED TO REMOVE STEAM FROM SCALDING/SCRAPING AREA ON LEVEL 4 - Rath Packing Company, Hog Killing Building, Sycamore Street between Elm & Eighteenth Streets, Waterloo, Black Hawk County, IA

  14. 16. CONCRETE PAD ON WHICH AN ELECTRICAL REACTOR WAS MOUNTED, ...

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

    16. CONCRETE PAD ON WHICH AN ELECTRICAL REACTOR WAS MOUNTED, IN THE BASEMENT, EAST WALL - Bonneville Power Administration South Bank Substation, I-84, South of Bonneville Dam Powerhouse, Bonneville, Multnomah County, OR

  15. Helmet-Mounted Display Of Clouds Of Harmful Gases

    NASA Technical Reports Server (NTRS)

    Diner, Daniel B.; Barengoltz, Jack B.; Schober, Wayne R.

    1995-01-01

    Proposed helmet-mounted opto-electronic instrument provides real-time stereoscopic views of clouds of otherwise invisible toxic, explosive, and/or corrosive gas. Display semitransparent: images of clouds superimposed on scene ordinarily visible to wearer. Images give indications on sizes and concentrations of gas clouds and their locations in relation to other objects in scene. Instruments serve as safety devices for astronauts, emergency response crews, fire fighters, people cleaning up chemical spills, or anyone working near invisible hazardous gases. Similar instruments used as sensors in automated emergency response systems that activate safety equipment and emergency procedures. Both helmet-mounted and automated-sensor versions used at industrial sites, chemical plants, or anywhere dangerous and invisible or difficult-to-see gases present. In addition to helmet-mounted and automated-sensor versions, there could be hand-held version. In some industrial applications, desirable to mount instruments and use them similarly to parking-lot surveillance cameras.

  16. Imaging the Mount St. Helens Magmatic Systems using Magnetotellurics

    NASA Astrophysics Data System (ADS)

    Hill, G. J.; Caldwell, T. G.; Heise, W.; Bibby, H. M.; Chertkoff, D. G.; Burgess, M. K.; Cull, J. P.; Cas, R. A.

    2009-05-01

    A detailed magnetotelluric survey of Mount St. Helens shows that a conduit like zone of high electrical conductivity beneath the volcano is connected to a larger zone of high conductivity at 15 km depth that extends eastward to Mount Adams. We interpret this zone to be a region of connected melt that acts as the reservoir for the silicic magma being extruded at the time of the magnetotelluric survey. This interpretation is consistent with a mid-crustal origin for the silicic component of the Mount St. Helens' magmas and provides an elegant explanation for a previously unexplained feature of the seismicity observed at the time of the catastrophic eruption in 1980. This zone of high mid-crustal conductivity extends northwards to near Mount Rainier suggesting a single region of connected melt comparable in size to the largest silicic volcanic systems known.

  17. DE LAVAUD CASTING FACING NORTH, NOTE CORE MOUNTED IN PREPARATION ...

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

    DE LAVAUD CASTING FACING NORTH, NOTE CORE MOUNTED IN PREPARATION FOR NEXT PIPE CASTING. - United States Pipe & Foundry Company Plant, Pipe Casting & Testing Area, 2023 St. Louis Avenue at I-20/59, Bessemer, Jefferson County, AL

  18. Detail of diagonal end post support bracket mounted to east ...

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

    Detail of diagonal end post support bracket mounted to east face of track girder, east span. View south - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

  19. Surface-mounted flat conductor cable for home wiring

    NASA Technical Reports Server (NTRS)

    Hankins, J. D.; Carden, J. R.

    1974-01-01

    The concepts are discussed which are being considered and developed for surface-mounted wiring using flat conductor cable. Safety aspects, problems being encountered, and advantages are also discussed.

  20. View of CCTV camera mounted on aft payload bay bulkhead

    NASA Technical Reports Server (NTRS)

    1981-01-01

    View of the closed circuit television (CCTV) camera mounted on aft payload bay bulkhead on the starboard side of the space shuttle near the orbital maneuvering systems (OMS) reaction control system (RCS) pods.

  1. 11. Submersible torpedo tube mounted on platform of elevator at ...

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

    11. Submersible torpedo tube mounted on platform of elevator at northeast (starboard) elevator tower. - Naval Torpedo Station, Firing Pier, North end of Gould Island in Narragansett Bay, Newport, Newport County, RI

  2. 10. INTERIOR VIEW SHOWING MOUNTINGS FROM TUNING DEVICE. VIEW SHOWS ...

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

    10. INTERIOR VIEW SHOWING MOUNTINGS FROM TUNING DEVICE. VIEW SHOWS COPPER SHEETING ON WALLS. - Chollas Heights Naval Radio Transmitting Facility, Helix House, 6410 Zero Road, San Diego, San Diego County, CA

  3. VIEW FACING NORTH OF WEST QUARRY WALL, WITH METAL MOUNTING ...

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

    VIEW FACING NORTH OF WEST QUARRY WALL, WITH METAL MOUNTING BOLT FOR DERRICK VISIBLE - Granite Hill Plantation, Quarry No. 1, South side of State Route 16, 1.3 miles northeast east of Sparta, Sparta, Hancock County, GA

  4. 212. MOUNT SINAI CHURCH OF GOD AT 530 SOUTH TWENTIETH ...

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

    212. MOUNT SINAI CHURCH OF GOD AT 530 SOUTH TWENTIETH STREET, SOUTH SIDE - Russell Neighborhood, Bounded by Congress & Esquire Alley, Fifteenth & Twenty-first Streets, Louisville, Jefferson County, KY

  5. Frequency response calibration of recess-mounted pressure transducers

    Microsoft Academic Search

    M. A. Marcolini; P. F. Lorber; W. T. Miller Jr.; A. F. Covino Jr.

    1991-01-01

    A technique is described for measuring the frequency response of pressure transducers mounted inside a model, where a narrow pipette leads to an orifice at the surface. An acoustic driver is mounted to a small chamber which has an opening at the opposite end with an O-ring seal to place over the orifice. A 3.18 mm (1\\/8 inch) reference microphone

  6. Spectroscopic measurement of mounting-induced strain in optoelectronic devices

    Microsoft Academic Search

    Artur Bärwolff; Jens W. Tomm; Roland Müller; S. Weiss; M. Hutter; H. Oppermann; H. Reichl

    2000-01-01

    Mounting-induced strain in high-power laser diodes is studied by noninvasive photocurrent (PC) spectroscopy. We demonstrate that the strain can be determined with high accuracy by means of Fourier-transform (FT) photocurrent measurements. The optical transitions within the quantum well (QW) region of identical InAlGaAs\\/GaAs laser diodes which were mounted with different external strain have shown spectral shifts of up to 10

  7. Testing tail-mounted transmitters with Myocastor coypus (nutria)

    USGS Publications Warehouse

    Merino, S.; Carter, J.; Thibodeaux, G.

    2007-01-01

    We developed a tail-mounted radio-transmitter for Myocastor coypus (nutria) that offers a practical and efficient alternative to collar or implant methods. The mean retention time was 96 d (range 57-147 d, n = 7), making this a practical method for short-term studies. The tail-mounts were less injurious to animals than collars and easier for field researchers to implement than either collars or surgically implanted transmitters.

  8. Recycling system for printed wiring boards with mounted parts

    Microsoft Academic Search

    S. Yokoyama; Y. Ikuta; M. Iji

    1999-01-01

    A practical recycling system has been developed for printed wiring boards (PWBs) with electronic parts mounted on them. This system consists of part-removing, solder-removing and resin-board pulverizing\\/separating processes, and is effective in the recovery of useful materials. The authors have developed a part-removal apparatus which successfully removes through-hole devices as well as surface mounted devices from PWBs with almost no

  9. An improved storage bulb mount for DSN hydrogen masers

    NASA Technical Reports Server (NTRS)

    Dachel, P. R.; Russell, D. P.; Tucker, T. K.; Stratman, L. B.

    1979-01-01

    The presently used JPL hydrogen maser suspended atomic storage bulb and a rigid, single-plane mounted bulb are compared. The new bulb incorporates three major design changes: (1) mounting design; (2) alterations to the collimator; and (3) decrease in mass. These design changes are expected to increase the long-term stability of the frequency standard by reducing its sensitivity to vibration and thermal effects.

  10. Fire and Mud: Eruptions and Lahars of Mount Pinatubo, Philippines

    NSDL National Science Digital Library

    This book is a collection of papers about the 1991 eruptions of Mount Pinatubo, its subsequent widespread lahars, and volcanic hazards mitigation. The book includes papers on eruption hazards assessment and reaction to warnings; the ancient eruptive history, and pre-1991 modern geothermal exploration of Mount Pinatubo; related geophysical papers; sulfur dioxide emissions; studies of the rocks including pumice types; and the impact of the eruption, including building damage and socioeconomic effects, as well as the atmospheric impact.

  11. Development and manufacture of visor for helmet-mounted display

    Microsoft Academic Search

    David H. Krevor; Gregg McNelly; John Skubon; Robert Speirs

    2004-01-01

    The manufacturing design and process development for the Visor for the JHMCS (Joint Helmet Mounted Cueing System) are discussed. The JHMCS system is a Helmet Mounted Display (HMD) system currently flying on the F-15, F-16 and F\\/A-18 aircraft. The Visor manufacturing processes are essential to both system performance and economy. The Visor functions both as the system optical combiner and

  12. Geologic map of Mount Gareloi, Gareloi Island, Alaska

    USGS Publications Warehouse

    Coombs, Michelle L.; McGimsey, Robert G.; Browne, Brandon L.

    2012-01-01

    As part of an effort to both monitor and study all historically active volcanoes in Alaska, the Alaska Volcano Observatory (AVO) undertook a field program at Mount Gareloi in the summer of 2003. During a month-long period, seismic networks were installed at Mount Gareloi and the neighboring Tanaga volcanic cluster. During this time, we undertook the first geologic field study of the volcano since Robert Coats visited Gareloi Island for four days in 1946. Understanding the geology of this relatively small island is important from a hazards perspective, because Mount Gareloi lies beneath a heavily trafficked air route between North America and Asia and has frequently erupted airborne ash since 1760. At least two landslides from the island have deposited debris on the sea floor; thus, landslide-generated tsunamis are also a potential hazard. Since seismic instruments were installed in 2003, they have detected small but consistent seismic signals from beneath Mount Gareloi's edifice, suggesting an active hydrothermal system. Mount Gareloi is also important from the standpoint of understanding subduction-related volcanism, because it lies in the western portion of the volcanically active arc, where subduction is oblique to the arc front. Understanding the compositional evolution of Mount Gareloi fills a spatial gap in along-arc studies.

  13. Noise transmission and attenuation by stiffened panels

    NASA Astrophysics Data System (ADS)

    Vaicaitis, R.; Slazak, M.; Chang, M. T.

    1980-06-01

    An analytical study of noise transmission into semi-cylindrical and rectangular acoustic enclosures due to turbulent boundary layer pressure and propeller noise (prop-fan) is presented. The structural noise transmission models include a single panel, discretely stiffened elastic panel and stiffened viscoelastic sandwich panel. Response characteristics of the stiffened panels are evaluated using a transfer matrix procedure. The interior noise field is determined by a Galerkin-like method. The effect on interior noise due to aerodynamic surface flow, cavity back-up pressure, pressurization, mass, stiffness, and damping addition to the structure is investigated. It is shown that stiffened viscoelastic sandwich panels, while providing the same stiffening benefits as an equivalent elastic panel, could significantly reduce vibration levels and subsequently give similar benefits for interior noise control.

  14. Wind tunnel testing of panel flutter control using piezoelectric actuation and iterative gain tuning

    NASA Astrophysics Data System (ADS)

    Ho, Ming-Tsang; Chen, Roger R.; Chu, Li-Chun

    1997-06-01

    This is the second part of a companion paper entitled 'Unified Approach of Active Panel Vibration and Flutter Control using Piezoelectric Actuation and Iterative Root Locus Method.' This paper reports the wind-tunnel test results of panel flutter suppression which is based on the methodology described in the companion paper. Composite panels with one-sided surface- mounted piezoelectric actuators and strain sensors are manufactured. Because the piezoelectric actuators are mounted on one side of the panels only, in plane forces and bending moments are induced simultaneously when the actuators are excited with input voltages. Strain and strain-rate signals picked up by strain gages and electronic differentiators are the system outputs for feedback. Three different configurations are tested and their results are compared, which are: one set of piezo-actuators at leading edge, one set of piezo-actuators at trailing edge, and two independent sets of piezo-actuators at leading and trailing edges respectively. The nonlinear finite element dynamic models for various configurations are introduced. While the experimental setup allows a systematic way of tuning the gains during the test, the theoretical control designs are introduced which comprises the iterative root locus method and the output feedback optimum algorithm. Reasonable details of test procedures are described and major findings of this research are in order. Firstly, strain level at leading edge is about 25% of that at trailing edge. Secondly, actuators at leading edge are more effective than those at trailing edge. Finally, flutter dynamic pressure can be raised by 20 to approximately 30% using active control.

  15. Re-active Passive (RAP) Devices for Control of Noise Transmission through a Panel

    NASA Technical Reports Server (NTRS)

    Carneal, James P.; Giovanardi, Marco; Fuller, Chris R.; Palumbo, Daniel L.

    2008-01-01

    Re-Active Passive (RAP) devices have been developed to control low frequency (<1000 Hz) noise transmission through a panel. These devices use a combination of active, re-active, and passive technologies packaged into a single unit to control a broad frequency range utilizing the strength of each technology over its best suited frequency range. The RAP device uses passive constrained layer damping to cover the relatively high frequency range (>200 Hz), reactive distributed vibration absorber) to cover the medium frequency range (75 to 250 Hz), and active control for controlling low frequencies (<200 Hz). The device was applied to control noise transmission through a panel mounted in a transmission loss test facility. Experimental results are presented for the bare panel, and combinations of passive treatment, reactive treatment, and active control. Results indicate that three RAP devices were able to increase the overall broadband (15-1000 Hz) transmission loss by 9.4 dB. These three devices added a total of 285 grams to the panel mass of 6.0 kg, or approximately 5%, not including control electronics.

  16. Causal feedforward control of a stochastically excited fuselage structure with active sidewall panel.

    PubMed

    Misol, Malte; Haase, Thomas; Monner, Hans Peter; Sinapius, Michael

    2014-10-01

    This paper provides experimental results of an aircraft-relevant double panel structure mounted in a sound transmission loss facility. The primary structure of the double panel system is excited either by a stochastic point force or by a diffuse sound field synthesized in the reverberation room of the transmission loss facility. The secondary structure, which is connected to the frames of the primary structure, is augmented by actuators and sensors implementing an active feedforward control system. Special emphasis is placed on the causality of the active feedforward control system and its implications on the disturbance rejection at the error sensors. The coherence of the sensor signals is analyzed for the two different disturbance excitations. Experimental results are presented regarding the causality, coherence, and disturbance rejection of the active feedforward control system. Furthermore, the sound transmission loss of the double panel system is evaluated for different configurations of the active system. A principal result of this work is the evidence that it is possible to strongly influence the transmission of stochastic disturbance sources through double panel configurations by means of an active feedforward control system. PMID:25324065

  17. Electro-optical backplane demonstrator with integrated multimode gradient-index thin glass waveguide panel

    NASA Astrophysics Data System (ADS)

    Schröder, Henning; Brusberg, Lars; Pitwon, Richard; Whalley, Simon; Wang, Kai; Miller, Allen; Herbst, Christian; Weber, Daniel; Lang, Klaus-Dieter

    2015-03-01

    Optical interconnects for data transmission at board level offer increased energy efficiency, system density, and bandwidth scalability compared to purely copper driven systems. We present recent results on manufacturing of electrooptical printed circuit board (PCB) with integrated planar glass waveguides. The graded index multi-mode waveguides are patterned inside commercially available thin-glass panels by performing a specific ion-exchange process. The glass waveguide panel is embedded within the layer stack-up of a PCB using proven industrial processes. This paper describes the design, manufacture, assembly and characterization of the first electro-optical backplane demonstrator based on integrated planar glass waveguides. The electro-optical backplane in question is created by laminating the glass waveguide panel into a conventional multi-layer electronic printed circuit board stack-up. High precision ferrule mounts are automatically assembled, which will enable MT compliant connectors to be plugged accurately to the embedded waveguide interfaces on the glass panel edges. The demonstration platform comprises a standardized sub-rack chassis and five pluggable test cards each housing optical engines and pluggable optical connectors. The test cards support a variety of different data interfaces and can support data rates of up to 32 Gb/s per channel.

  18. Space Radar Image of Mount Pinatubo Volcano, Philippines

    NASA Technical Reports Server (NTRS)

    1994-01-01

    These are color composite radar images showing the area around Mount Pinatubo in the Philippines. The images were acquired by the Spaceborne Imaging Radar-C and X-band Synthetic Aperture Radar (SIR-C/X-SAR) aboard the space shuttle Endeavour on April 14, 1994 (left image) and October 5,1994 (right image). The images are centered at about 15 degrees north latitude and 120.5 degrees east longitude. Both images were obtained with the same viewing geometry. The color composites were made by displaying the L-band (horizontally transmitted and received) in red; the L-band (horizontally transmitted and vertically received) in green; and the C-band (horizontally transmitted and vertically received) in blue. The area shown is approximately 40 kilometers by 65 kilometers (25 miles by 40 miles). The main volcanic crater on Mount Pinatubo produced by the June 1991 eruptions and the steep slopes on the upper flanks of the volcano are easily seen in these images. Red on the high slopes shows the distribution of the ash deposited during the 1991 eruption, which appears red because of the low cross-polarized radar returns at C and L bands. The dark drainages radiating away from the summit are the smooth mudflows, which even three years after the eruptions continue to flood the river valleys after heavy rain. Comparing the two images shows that significant changes have occurred in the intervening five months along the Pasig-Potrero rivers (the dark area in the lower right of the images). Mudflows, called 'lahars,' that occurred during the 1994 monsoon season filled the river valleys, allowing the lahars to spread over the surrounding countryside. Three weeks before the second image was obtained, devastating lahars more than doubled the area affected in the Pasig-Potrero rivers, which is clearly visible as the increase in dark area on the lower right of the images. Migration of deposition to the east (right) has affected many communities. Newly affected areas included the community of Bacolor, Pampanga, where thousands of homes were buried in meters of hot mud and rock as 80,000 people fled the lahar-stricken area. Scientists are closely monitoring the westward migration ( toward the left in this image) of the lahars as the Pasig-Potrero rivers seek to join with the Porac River, an area that has not seen laharic activity since the eruption. This could be devastating because the Pasig-Potrero rivers might be permanently redirected to lower elevations along the Porac River where communities are located. Ground saturation with water during the rainy season reveals inactive channels that were dry in the April image. A small lake has turned into a pond in the lower reaches of the Potrero River because the channels are full of lahar deposits and the surface runoff has no where to flow. Changes in the degree of erosion in ash and pumice deposits from the 1991 eruption can also be seen in the channels that deliver the mudflow material to the Pasig-Potrero rivers. The 1991 Mount Pinatubo eruption is well known for its near-global effects on the atmosphere and short-term climate due to the large amount of sulfur dioxide that was injected into the upper atmosphere. Locally, however, the effects will most likely continue to impact surrounding areas for as long as the next 10 to 15 years. Mudflows, quite certainly, will continue to pose severe hazards to adjacent areas. Radar observations like those obtained by SIR-C/X-SAR will play a key role in monitoring these changes because of the radar's ability to see in daylight or darkness and even in the worst weather conditions. Radar imaging will be particularly useful, for example, during the monsoon season, when the lahars form. Frequent imaging of these lahar fields will allow scientists to better predict when they are likely to begin flowing again and which communities might be at risk. Spaceborne Imaging Radar-C and X-band Synthetic Aperture Radar (SIR-C/X-SAR) is part of NASA's Mission to Planet Earth. The radars illuminate Earth with microwaves, allowing detailed observations at any time, regardless

  19. Anaglyph, Mount St Helens, Washington State

    NASA Technical Reports Server (NTRS)

    2002-01-01

    On May 18, 1980, Mount St. Helens catastrophically erupted, causing the worst volcanic disaster in the recorded history of the United States. An earthquake shook loose the northern flank of the volcano, and about 2.8 cubic kilometers (0.67 cubic miles) of rock slid downslope in the world's largest recorded landslide. The avalanche released pressure on the volcano and unleashed a huge explosion, which was directed generally northward. The mountain ultimately lost 227 meters (1314 feet) of its height and devastated about 600 square kilometers (230 square miles) of forest.

    This anaglyph combines a Landsat satellite image with a Shuttle Radar Topography Mission elevation model to show the volcanic crater and most of the zone of devastation. Areas now relatively devoid of vegetation appear bright. Note the landslide debris clogging the northern drainages and forming natural dams (or enlarging previously existing ones). Also note the volcanic dome built up within the crater, and the extensive floating debris still present on Spirit Lake (northeast of the crater) 12 years after the eruption.

    The stereoscopic effect of this anaglyph was created by first draping a Landsat satellite image over a digital elevation data from the Shuttle Radar Topography Mission (SRTM), and then generating two differing perspectives, one for each eye. When viewed through special glasses, the result is a vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter.

    Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter (98-foot)resolution of most Landsat images and will substantially help in analyzing the large and growing Landsat image archive, managed by the U.S. Geological Survey (USGS).

    Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter(approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Earth Science Enterprise, Washington, D.C.

    Size: 48.0 kilometers (29.8 miles) by 30.3 kilometers (18.8 miles) Location: 46.3 degrees North latitude, 122.2 degrees West longitude Orientation: North at top Image Data: Landsat Bands 1,2,3 averaged as grey. Original Data Resolution: SRTM 1 arc-second (30 meters or 98 feet),Landsat 30 meters Date Acquired: February 2000 (SRTM), 10 August 1992 (Landsat)

  20. Stereo Pair, Mount St Helens, Washington State

    NASA Technical Reports Server (NTRS)

    2002-01-01

    On May 18, 1980, Mount St. Helens catastrophically erupted, causing the worst volcanic disaster in the recorded history of the United States. An earthquake shook loose the northern flank of the volcano, and about 2.8 cubic kilometers (0.67 cubic miles) of rock slid downslope in the world's largest recorded landslide. The avalanche released pressure on the volcano and unleashed a huge explosion, which was directed generally northward. The mountain ultimately lost 227 meters (1314 feet) of its height and devastated about 600 square kilometers (230 square miles) of forest.

    This stereoscopic view combines a Landsat satellite image with a Shuttle Radar Topography Mission elevation model to show the volcanic crater and most of the zone of devastation. Areas now relatively devoid of vegetation appear bright. Note the landslide debris clogging the northern drainages and forming natural dams (or enlarging previously existing ones). Also note the volcanic dome built up within the crater, and the extensive floating debris still present on Spirit Lake (northeast of the crater) 12 years after the eruption.

    This stereoscopic image was generated by draping a Landsat satellite image over a Shuttle Radar Topography Mission digital elevation model. Two differing perspectives were then calculated, one for each eye. They can be seen in 3-D by viewing the left image with the right eye and the right image with the left eye (cross-eyed viewing or by downloading and printing the image pair and viewing them with a stereoscope. When stereoscopically merged, the result is a vertically exaggerated view of Earth's surface in its full three dimensions.

    Landsat has been providing visible and infrared views of the Earth since 1972. SRTM elevation data matches the 30-meter (98-foot) resolution of most Landsat images and will substantially help in analyzing the large and growing Landsat image archive, managed by the U.S. Geological Survey (USGS).

    Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect 3-D measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Earth Science Enterprise, Washington, D.C.

    Size: 48.0 kilometers (29.8 miles) by 31.9 kilometers (19.8 miles) Location: 46.3 degrees North latitude, 122.2 degrees West longitude Orientation: North at top Image Data: Landsat Bands 3, 2, 1 as red, green, blue, respectively. Original Data Resolution: SRTM 1 arc-second (30 meters or 98 feet), Landsat 30 meters Date Acquired: February 2000 (SRTM), 10 August 1992 (Landsat)

  1. Surface-discharge-type plasma display panel

    Microsoft Academic Search

    S. Sato; H. Yamamoto; Y. Shirouchi; T. Iemori; N. Nakayama; I. Morita

    1976-01-01

    The surface-discharge type plasma display panel does not require accurate spacing between two plates. Also, the number of manufacturing processes can be reduced to nearly half those required for opposed-discharge-type panels, resulting in low cost. The relationship between the principal design factors of a surface-discharge-type panel and the firing voltage in the nonmemory mode is discussed, based upon experiments and

  2. 1-3 piezocomposite SmartPanels

    Microsoft Academic Search

    Daniel Fiore; Richard L. Gentilman; Hong Pham-Nguyen; William J. Serwatka; Patrick McGuire; Leslie Bowen

    1997-01-01

    Piezocomposite SmartPanelsTM, consisting of 1-3 actuators and pressure sensors and net-shape-molded PZT accelerometers in a large area low profile panel, have been fabricated at Materials Systems Inc. and evaluated at the Naval Research Laboratory. Single layer and two-layer 100 X 100 mm SmartPanels have been tested for sensor sensitivities, actuator authority, surface displacement uniformity, and sensor-actuator coupling. Multilayer GRP circuits

  3. 75 FR 20809 - Hydrographic Services Review Panel

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-21

    ...this responsibility. The Hydrographic Services Review Panel provides...data pertaining to: (a) Hydrographic surveying; (b) Shoreline surveying...more disciplines relating to hydrographic surveying, tides, currents,...

  4. Uncertainties in predicting solar panel power output

    NASA Technical Reports Server (NTRS)

    Anspaugh, B.

    1974-01-01

    The problem of calculating solar panel power output at launch and during a space mission is considered. The major sources of uncertainty and error in predicting the post launch electrical performance of the panel are considered. A general discussion of error analysis is given. Examples of uncertainty calculations are included. A general method of calculating the effect on the panel of various degrading environments is presented, with references supplied for specific methods. A technique for sizing a solar panel for a required mission power profile is developed.

  5. The 100 Series allows flat panel monitors, keyboards and laptops to be mounted with a minimum profile while providing

    E-print Network

    Saskatchewan, University of

    profile while providing side-to-side and forward-back pivot movement. The patented friction system-screen stability without the need for knobs or levers · Up to 180° of forward/back LCD tilt and 180° of side compliant · 5 year warranty Product Sheet for low profile systems Ergotron® 100 Series 870-05-026, rev. 08

  6. Analytical structural efficiency studies of borsic/aluminum compression panels

    NASA Technical Reports Server (NTRS)

    Mcwithey, R. R.

    1976-01-01

    Analytically determined mass-strength curves, strain-strength curves, and dimensions are presented for structurally efficient hat-stiffened panels, corrugation-stiffened panels, hat-stiffened honeycomb-core sandwich panels, open-section corrugation panels, and honeycomb-core sandwich panels. The panels were assumed to be fabricated from either titanium, borsic/aluminum, or a combination of these materials. Borsic/aluminum panels and titanium panels reinforced with borsic/aluminum were lighter and stiffer than comparably designed titanium panels. Reinforced titanium panels had the same extensional stiffness as comparably designed Borsic/aluminum panels. For a given load, the structural efficiency of the hat-stiffened honeycomb-core sandwich panel was higher than the structural efficiency of the other stiffened panels.

  7. STFC Astronomy Advisory Panel Report (October 2012) STFC Astronomy Advisory Panel report (October 2012) 1

    E-print Network

    Crowther, Paul

    #12;STFC Astronomy Advisory Panel Report (October 2012) STFC Astronomy Advisory Panel report (October 2012) 1 STFC Astronomy Advisory Panel 2012 Programmatic Review report to PPAN (October 2012) Executive summary This document provides a roadmap for UK astronomy and provides advice for future science

  8. Repeated buckling of composite shear panels

    NASA Technical Reports Server (NTRS)

    Singer, Josef; Weller, Tanchum

    1990-01-01

    Failures in service of aerospace structures and research at the Technion Aircraft Structures Laboratory have revealed that repeatedly buckled stiffened shear panels might be susceptible to premature fatigue failures. Extensive experimental and analytical studies have been performed at Technion on repeated buckling, far in excess of initial buckling, for both metal and composite shear panels with focus on the influence of the surrounding structure. The core of the experimental investigation consisted of repeated buckling and postbuckling tests on Wagner beams in a three-point loading system under realistic test conditions. The effects of varying sizes of stiffeners, of the magnitude of initial buckling loads, of the panel aspect ratio and of the cyclic shearing force, V sub cyc, were studied. The cyclic to critical shear buckling ratios, (V sub cyc/V sub cr) were on the high side, as needed for efficient panel design, yet all within possible flight envelopes. The experiments were supplemented by analytical and numerical analyses. For the metal shear panels the test and numerical results were synthesized into prediction formulas, which relate the life of the metal shear panels to two cyclic load parameters. The composite shear panels studied were hybrid beams with graphite/epoxy webs bonded to aluminum alloy frames. The test results demonstrated that composite panels were less fatigue sensitive than comparable metal ones, and that repeated buckling, even when causing extensive damage, did not reduce the residual strength by more than 20 percent. All the composite panels sustained the specified fatigue life of 250,000 cycles. The effect of local unstiffened holes on the durability of repeatedly buckled shear panels was studied for one series of the metal panels. Tests on 2024 T3 aluminum panels with relatively small unstiffened holes in the center of the panels demonstrated premature fatigue failure, compared to panels without holes. Preliminary tests on two graphite epoxy shear panels with small holes in the center showed no similar fatigue life degradation and no shift in failure mode. Further tests on the effect of holes are in progress.

  9. Water levels and water-level changes in the Prairie du Chien-Jordan and Mount Simon-Hinckley aquifers, Twin Cities metropolitan area, Minnesota, 1971-80

    USGS Publications Warehouse

    Schoenberg, Michael

    1984-01-01

    The Mississippi, Minnesota, and St. Croix Rivers greatly influence flow patterns in the Prairie du Chien-Jordan aquifer. Water generally flows toward these streams from surrounding water-level highs. Heavy pumping has caused only localized cones of depression. In contrast, pumping in Minneapolis and St. Paul has greatly influenced ground-water flow in the Mount Simon-Hinckley aquifer, resulting in a large cone of depression. Between 1971 and 1980 average water levels in the Prairie du Chien-Jordan aquifer changed less than 5 feet in most of the study area, while average water levels in the Mount Simon-Hinckley aquifer rose as much as 60 feet in the center of the cone of depression. Water-level data suggest that (1) little variation of annual pumpage between 1971 and 1980 from the Prairie du Chien-Jordan aquifer produced generally stable water levels in that aquifer, (2) decreased annual pumpage from 1971 to 1980 from the Mount Simon-Hinckley aquifer caused rising water levels in that aquifer, and (3) a greater seasonal component of pumpage for the Mount Simon-Hinckley aquifer than for the Prairie du Chien-Jordan produced larger and more widespread seasonal water-level declines in the Mount Simon-Hinckley than in the Prairie du Chien-Jordan, particularly during dry years. (USGS)

  10. Hypervelocity Impact Performance of Open Cell Foam Core Sandwich Panel Structures

    NASA Technical Reports Server (NTRS)

    Ryan, S.; Ordonez, E.; Christiansen, E. L.; Lear, D. M.

    2010-01-01

    Open cell metallic foam core sandwich panel structures are of interest for application in spacecraft micrometeoroid and orbital debris shields due to their novel form and advantageous structural and thermal performance. Repeated shocking as a result of secondary impacts upon individual foam ligaments during the penetration process acts to raise the thermal state of impacting projectiles ; resulting in fragmentation, melting, and vaporization at lower velocities than with traditional shielding configurations (e.g. Whipple shield). In order to characterize the protective capability of these structures, an extensive experimental campaign was performed by the Johnson Space Center Hypervelocity Impact Technology Facility, the results of which are reported in this paper. Although not capable of competing against the protection levels achievable with leading heavy shields in use on modern high-risk vehicles (i.e. International Space Station modules), metallic foam core sandwich panels are shown to provide a substantial improvement over comparable structural panels and traditional low weight shielding alternatives such as honeycomb sandwich panels and metallic Whipple shields. A ballistic limit equation, generalized in terms of panel geometry, is derived and presented in a form suitable for application in risk assessment codes.

  11. Heavy ion measurement on LDEF

    NASA Technical Reports Server (NTRS)

    Beaujean, R.; Jonathal, D.; Enge, W.

    1991-01-01

    The Kiel Long Duration Exposure Facility (LDEF) experiment M0002, mounted on experiment tray E6, was designed to measure the heavy ion environment by means of CR-39 plastic solid state track detectors. The detector stack with a size of 40x34x4.5 cu cm was exposed in vacuum covered by thermal protection foils with a total thickness of approx. 14 mg/sq cm. After etching small samples of the detector foils tracks with Z greater than or = 6 could be easily detected on a background of small etch pits, which were probably produced by secondaries from proton interactions. The LDEF orientation with respect to the magnetic field lines within the South Atlantic Anomaly (SAA) is expected to be constant during the mission. Therefore, the azimuth angle distribution was measured on the detector foils for low energy stopping particles. All detected arrival directions are close to a plane perpendicular to the magnetic field line of -20 deg declination and -40 deg inclination at location 34 deg W and 27 deg S. Together with the steep energy spectrum, this spatial distribution close to the mirror plane in the SAA is an evidence that heavy ions were detected from a radiation belt population.

  12. Eruptions of Mount St. Helens : Past, present, and future

    USGS Publications Warehouse

    Tilling, Robert I.; Topinka, Lyn J.; Swanson, Donald A.

    1990-01-01

    Mount St. Helens, located in southwestern Washington about 50 miles northeast of Portland, Oregon, is one of several lofty volcanic peaks that dominate the Cascade Range of the Pacific Northwest; the range extends from Mount Garibaldi in British Columbia, Canada, to Lassen Peak in northern California. Geologists call Mount St. Helens a composite volcano (or stratovolcano), a term for steepsided, often symmetrical cones constructed of alternating layers of lava flows, ash, and other volcanic debris. Composite volcanoes tend to erupt explosively and pose considerable danger to nearby life and property. In contrast, the gently sloping shield volcanoes, such as those in Hawaii, typically erupt nonexplosively, producing fluid lavas that can flow great distances from the active vents. Although Hawaiian-type eruptions may destroy property, they rarely cause death or injury. Before 1980, snow-capped, gracefully symmetrical Mount St. Helens was known as the "Fujiyama of America." Mount St. Helens, other active Cascade volcanoes, and those of Alaska form the North American segment of the circum-Pacific "Ring of Fire," a notorious zone that produces frequent, often destructive, earthquake and volcanic activity.

  13. Shock absorber mount assembly for motor vehicle suspension

    SciTech Connect

    Kubo, K.

    1987-09-01

    A mount assembly is described for mounting a shock absorber/coil assembly in a motor vehicle suspension, the shock absorber/coil assembly including a fluid cylinder, a piston rod movable into and out of the cylinder, a vibration isolator mounted on an end of the piston rod, and a coil spring disposed around the fluid cylinder and the piston rod. The mount assembly consists of: a retainer adapted to be mounted on the vibration isolator and having an attachment portion adapted for attachment to a motor vehicle frame; a spring seat adapted to engage an end of the coil spring; and a thrust bearing interposed between the attachment portion of the retainer and the spring seat and adapted to extend around the vibration isolator, the thrust bearing including a pair of first and second races and a plurality of balls rotatably disposed between the first and second races, the first race engaging the retainer and the second race engaging the spring seat.

  14. Whole-mount single molecule FISH method for zebrafish embryo.

    PubMed

    Oka, Yuma; Sato, Thomas N

    2015-01-01

    Noise in gene expression renders cells more adaptable to changing environment by imposing phenotypic and functional heterogeneity on genetically identical individual cells. Hence, quantitative measurement of noise in gene expression is essential for the study of biological processes in cells. Currently, there are two complementary methods for quantitatively measuring noise in gene expression at the single cell level: single molecule FISH (smFISH) and single cell qRT-PCR (or single cell RNA-seq). While smFISH has been developed for culture cells, tissue sections and whole-mount invertebrate organisms, the method has not been reported for whole-mount vertebrate organisms. Here, we report an smFISH method that is suitable for whole-mount zebrafish embryo, a popular vertebrate model organism for the studies of development, physiology and disease. We show the detection of individual transcripts for several cell-type specific and ubiquitously expressed genes at the single cell level in whole-mount zebrafish embryo. We also demonstrate that the method can be adapted to detect two different genes in individual cells simultaneously. The whole-mount smFISH method described in this report is expected to facilitate the study of noise in gene expression and its role in zebrafish, a vertebrate animal model relevant to human biology. PMID:25711926

  15. Development of stitching reinforcement for transport wing panels

    NASA Technical Reports Server (NTRS)

    Palmer, Raymond J.; Dow, Marvin B.; Smith, Donald L.

    1991-01-01

    The NASA Advanced Composites Technology (ACT) program has the objective of providing the technology required to obtain the full benefit of weight savings and performance improvements offered by composite primary aircraft structures. Achieving the objective is dependent upon developing composite materials and structures which are damage tolerant and economical to manufacture. Researchers are investigating stitching reinforcement combined with resin transfer molding to produce materials meeting the ACT program objective. Research is aimed at materials, processes, and structural concepts for application in both transport wings and fuselages, but the emphasis to date has been on wing panels. Empirical guidelines are being established for stitching reinforcement in structures designed for heavy loads. Results are presented from evaluation tests investigating stitching types, threads, and density (penetrations per square inch). Tension strength, compression strength, and compression after impact data are reported.

  16. Fusion Development Path Panel Preliminary Report

    E-print Network

    Fusion Development Path Panel Preliminary Report Summary for NRC BPAC Panel (Focus on MFE of a demonstration power plant in approximately 35 years. The plan should recognize the capabilities of all fusion facilities around the world, and include both magnetic fusion energy (MFE) and inertial fusion energy (IFE

  17. Welding-through doweling of wood panels

    Microsoft Academic Search

    L. Resch; A. Despres; A. Pizzi; J.-M. Leban

    2006-01-01

    Panel products have been joined to levels satisfying the requirements of the relevant standards for metallic connector assemblies by rotation welding of beech dowels through them. The wood panels substrates such as particleboard, OSB and MDF welded to the dowels almost as well as solid timber. Welded-through dowel assemblies presented better stiffness of the test joints than similar assemblies of

  18. 75 FR 27825 - Arts Advisory Panel

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-18

    ...National Endowment for the Arts Arts Advisory Panel Pursuant to...given that one meeting of the Arts Advisory Panel to the National Council on the Arts will be held at the Nancy Hanks...ending times are approximate): Design/Mayor's Institute on...

  19. Circuits in the Sun: Solar Panel Physics

    ERIC Educational Resources Information Center

    Gfroerer, Tim

    2013-01-01

    Typical commercial solar panels consist of approximately 60 individual photovoltaic cells connected in series. Since the usual Kirchhoff rules apply, the current is uniform throughout the circuit, while the electric potential of the individual devices is cumulative. Hence, a solar panel is a good analog of a simple resistive series circuit, except…

  20. ROBOTIC DEVICE FOR CLEANING PHOTOVOLTAIC PANEL ARRAYS

    E-print Network

    Mavroidis, Constantinos

    . The main method for harnessing solar power is with arrays made up of photovoltaic (PV) panels. Accumulation for the environmental impact of fossil fuels, implementation of eco-friendly energy sources like solar power are rising arrays up to an operating park of 22,000 panels (20,000 square meters). #12;2 Figure 1: Example of power

  1. Combustion chamber floatwall panel attachment arrangement

    Microsoft Academic Search

    C. J. Griffin

    1984-01-01

    The abstract discloses an attachment arrangement in a combustion chamber of a gas turbine powerplant, having a double wall structure formed by a separate combustor shell and at least one floatwall panel. The arrangement includes a pair of hook-like projections protruding from the panel and through the shell and a pair of thin plates for interengaging the hook-like projections on

  2. A thermal model for nonlinear panel flutter

    Microsoft Academic Search

    David John Gee

    1998-01-01

    The subject of this research is the nonlinear panel flutter behavior for high Mach number, viscous compressible flow over one side of an isotropic, elastic panel. The fluid\\/structure interaction is treated as an aerothermoelastic problem in the sense that in addition to aeroelastic coupling, we consider thermal coupling between the fluid and structure. Specifically, at least two distinct heat transfer

  3. Thermal response of composite panels

    NASA Technical Reports Server (NTRS)

    Kourtides, D. A.; Gilwee, W. J., Jr.; Parker, J. A.

    1979-01-01

    The thermochemical and flammability characteristics of laminating resins and composites currently in use and others being considered for use as aircraft interior panels are described. The properties studied included: (1) limiting oxygen index of the composite constituents; (2) fire containment capability of the composite; (3) smoke evolution from the composite; (4) thermogravimetric analysis; (5) composition of the volatile products of thermal degradation; and (6) relative toxicity of the volatile products of pyrolysis. The performance of high-temperature laminating resins such as modified phenolics, polyimides and bismaleimides is compared with the performance of epoxies. The relationship of increased fire safety with the use of polymers with high anaerobic char yield is shown. Processing parameters of the state-of-the-art epoxy resin and the advanced resin composites are detailed.

  4. Laser illuminated flat panel display

    SciTech Connect

    Veligdan, J.T.

    1995-12-31

    A 10 inch laser illuminated flat panel Planar Optic Display (POD) screen has been constructed and tested. This POD screen technology is an entirely new concept in display technology. Although the initial display is flat and made of glass, this technology lends itself to applications where a plastic display might be wrapped around the viewer. The display screen is comprised of hundreds of planar optical waveguides where each glass waveguide represents a vertical line of resolution. A black cladding layer, having a lower index of refraction, is placed between each waveguide layer. Since the cladding makes the screen surface black, the contrast is high. The prototype display is 9 inches wide by 5 inches high and approximately I inch thick. A 3 milliwatt HeNe laser is used as the illumination source and a vector scanning technique is employed.

  5. Full scale GLARE fuselage panel tests

    NASA Technical Reports Server (NTRS)

    Vercammen, Roland W. A.; Ottens, Harold H.

    1996-01-01

    A GLARE fuselage panel, representative of the crown section of the Fokker 100 fuselage in front of the wing, was tested. The panels were loaded by air pressure resulting in tangential stress in the panel by axial loading, representative of both the cabin pressure and the fuselage bending due to taxiing and gust loading. A fatigue test, simulating 180000 flights, followed by static tests were performed. The panel was loaded to failure at 1.32 ultimate load. The test set-up, the uniform strain distribution of the panel, and the fatigue loads applied at high test frequency are described. The use of GLARE leads to a substantial weight reduction without affecting the fatigue static strength.

  6. Ring connection for porous combustor wall panels

    NASA Technical Reports Server (NTRS)

    Verdouw, Albert J. (Inventor)

    1980-01-01

    A gas turbine engine combustor assembly of unique configuration has an outer wall made up of a plurality of axially extending multi-layered porous metal panels joined together at butt joints therebetween by a reinforcing and heat dissipation ring and a unique weld configuration to prevent thermal erosion of the ends of the porous metal panels at the butt joints; the combustor further including a unique inner wall made up of a plurality of like axially extending multi-layered porous metal panels joined at butt joints by a reinforcing and heat dissipation ring on the inner surface of the inner wall panels and an improved butt weld joint that prevents thermal erosion of the ends of the porous metal inner wall panels.

  7. Reliability of stiffened structural panels: Two examples

    NASA Technical Reports Server (NTRS)

    Stroud, W. Jefferson; Davis, D. Dale, Jr.; Maring, Lise D.; Krishnamurthy, Thiagaraja; Elishakoff, Isaac

    1992-01-01

    The reliability of two graphite-epoxy stiffened panels that contain uncertainties is examined. For one panel, the effect of an overall bow-type initial imperfection is studied. The size of the bow is assumed to be a random variable. The failure mode is buckling. The benefits of quality control are explored by using truncated distributions. For the other panel, the effect of uncertainties in a strain-based failure criterion is studied. The allowable strains are assumed to be random variables. A geometrically nonlinear analysis is used to calculate a detailed strain distribution near an elliptical access hole in a wing panel that was tested to failure. Calculated strains are used to predict failure. Results are compared with the experimental failure load of the panel.

  8. Eos, Vol. 91, No. 45, 9 November 2010 I read with great interest "Mount St. Hel-

    E-print Network

    Robock, Alan

    traveling waves) that were caused by the explosion. I have a personal interest in the 1980 Mount St. Helens as far away from Mount St. Helens as Mount Clemens, Mich., 3122 kilometers dis- tant. We were able "AFGL magnetometer observations of Mount St. Helens erup- tion," which subsequently appeared in Eos (61

  9. Acoustically Tailored Composite Rotorcraft Fuselage Panels

    NASA Technical Reports Server (NTRS)

    Hambric, Stephen; Shepherd, Micah; Koudela, Kevin; Wess, Denis; Snider, Royce; May, Carl; Kendrick, Phil; Lee, Edward; Cai, Liang-Wu

    2015-01-01

    A rotorcraft roof sandwich panel has been redesigned to optimize sound power transmission loss (TL) and minimize structure-borne sound for frequencies between 1 and 4 kHz where gear meshing noise from the transmission has the most impact on speech intelligibility. The roof section, framed by a grid of ribs, was originally constructed of a single honeycomb core/composite face sheet panel. The original panel has coincidence frequencies near 700 Hz, leading to poor TL across the frequency range of 1 to 4 kHz. To quiet the panel, the cross section was split into two thinner sandwich subpanels separated by an air gap. The air gap was sized to target the fundamental mass-spring-mass resonance of the double panel system to less than 500 Hz. The panels were designed to withstand structural loading from normal rotorcraft operation, as well as 'man-on-the-roof' static loads experienced during maintenance operations. Thin layers of VHB 9469 viscoelastomer from 3M were also included in the face sheet ply layups, increasing panel damping loss factors from about 0.01 to 0.05. Measurements in the NASA SALT facility show the optimized panel provides 6-11 dB of acoustic transmission loss improvement, and 6-15 dB of structure-borne sound reduction at critical rotorcraft transmission tonal frequencies. Analytic panel TL theory simulates the measured performance quite well. Detailed finite element/boundary element modeling of the baseline panel simulates TL slightly more accurately, and also simulates structure-borne sound well.

  10. Long term measurement of lake evaporation using a pontoon mounted Eddy Covariance system

    NASA Astrophysics Data System (ADS)

    McGowan, H. A.; McGloin, R.; McJannet, D.; Burn, S.

    2011-12-01

    Accurate quantification of evaporation from water storages is essential for design of water management and allocation policy that aims to balance demands for water without compromising the sustainability of future water resources, particularly during periods of prolonged and severe drought. Precise measurement of evaporation from lakes and dams however, presents significant research challenges. These include design and installation of measurement platforms that can withstand a range of wind and wave conditions; accurate determination of the evaporation measurement footprint and the influence of changing water levels. In this paper we present results from a two year long deployment of a pontoon mounted Eddy Covariance (EC) system on a 17.2ha irrigation reservoir in southeast Queensland, Australia. The EC unit included a CSAT-3 sonic anemometer (Campbell Scientific, Utah, United States) and a Li-Cor CS7500 open-path H2O/CO2 infrared gas analyzer (LiCor, Nebraska, United States) at a height of 2.2m, a net radiometer (CNR1, Kipp & Zonen, Netherlands) at a height of 1.2m and a humidity and temperature probe (HMP45C,Vaisala, Finland) at 2.3m. The EC unit was controlled by a Campbell Scientific CR3000 data logger with flux measurements made at 10 Hz and block averaged values logged every 15 minutes. Power to the EC system was from mounted solar panels that charged deep cycle lead-acid batteries while communication was via a cellphone data link. The pontoon was fitted with a weighted central beam and gimbal ring system that allowed self-levelling of the instrumentation and minimized dynamic influences on measurements (McGowan et al 2010; Wiebe et al 2011). EC measurements were corrected for tilt errors using the double rotation method for coordinate rotation described by Wilczak et al. (2001). High and low frequency attenuation of the measured co-spectrum was corrected using Massman's (2000) method for estimating frequency response corrections, while measurements were corrected for density fluctuations using the method of Webb-Pearman-Leuning (Webb et al. 1980). The evaporation measurement footprint over the reservoir was determined using the SCADIS one and a half order turbulence closure footprint model (Sogachev and Lloyd, 2004). Comparison of EC measured evaporation rates show excellent agreement with independent measurement of evaporation by scintillometer under a wide range of conditions (McJannet et al 2011). They confirm that pontoon mounted EC systems offer a robust, highly portable and reliable cost effective approach for accurate quantification of evaporation from reservoirs.

  11. SPF/DB titanium LFC porous panel concept

    NASA Technical Reports Server (NTRS)

    Williams, N. R.

    1982-01-01

    Illustrations for a presentation demonstrating superplastic forming/diffusion bonding titanium porous panels are presented. Fabrication phases, sandwich panels, load bearing qualities, microstructure, and panel surface after finishing are illustrated.

  12. 46 CFR 120.330 - Distribution panels and switchboards.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Distribution Systems § 120.330 Distribution panels and switchboards. (a) Each distribution panel and switchboard must be...debris and dripping or splashing water. (b) Each distribution panel or switchboard must be...

  13. 46 CFR 129.330 - Distribution panels and switchboards.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Distribution Systems § 129.330 Distribution panels and switchboards. (a) Each distribution panel or switchboard must be...debris and dripping or splashing water. (b) Each distribution panel or switchboard must be...

  14. 46 CFR 183.330 - Distribution panels and switchboards.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Distribution Systems § 183.330 Distribution panels and switchboards. (a) Each distribution panel and switchboard must be...debris and dripping or splashing water. (b) Each distribution panel or switchboard must be...

  15. 46 CFR 129.330 - Distribution panels and switchboards.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Distribution Systems § 129.330 Distribution panels and switchboards. (a) Each distribution panel or switchboard must be...debris and dripping or splashing water. (b) Each distribution panel or switchboard must be...

  16. 46 CFR 120.330 - Distribution panels and switchboards.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Distribution Systems § 120.330 Distribution panels and switchboards. (a) Each distribution panel and switchboard must be...debris and dripping or splashing water. (b) Each distribution panel or switchboard must be...

  17. 46 CFR 112.43-7 - Navigating bridge distribution panel.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Navigating bridge distribution panel. 112...CONTINUED) ELECTRICAL ENGINEERING EMERGENCY LIGHTING AND POWER...112.43-7 Navigating bridge distribution panel. ...distribution panel on the navigating bridge: (1) Navigation...

  18. 46 CFR 112.43-7 - Navigating bridge distribution panel.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 false Navigating bridge distribution panel. 112...CONTINUED) ELECTRICAL ENGINEERING EMERGENCY LIGHTING AND POWER...112.43-7 Navigating bridge distribution panel. ...distribution panel on the navigating bridge: (1) Navigation...

  19. Frequency response calibration of recess-mounted pressure transducers

    NASA Technical Reports Server (NTRS)

    Marcolini, M. A.; Lorber, P. F.; Miller, W. T., Jr.; Covino, A. F., Jr.

    1991-01-01

    A technique is described for measuring the frequency response of pressure transducers mounted inside a model, where a narrow pipette leads to an orifice at the surface. An acoustic driver is mounted to a small chamber which has an opening at the opposite end with an O-ring seal to place over the orifice. A 3.18 mm (1/8 inch) reference microphone is mounted to one side of the chamber. The acoustic driver receives an input of white noise, and the transducer and reference microphone outputs are compared to obtain the frequency response of the pressure transducer. Selected results are presented in the form of power spectra for both the transducer and the reference, as well as the amplitude variation and phase shift between the two signals as a function of frequency. The effect of pipette length and the use of this technique for identifying both blocked orifices and faulty transducers are described.

  20. Piezoelectric resonator assembly with thin molybdenum mounting clips

    DOEpatents

    Peters, R. Donald (Pinellas Park, FL)

    1981-01-01

    A resonator mounting assembly wherein the resonator blank is mounted agai an essentially planar surface presented by a plurality of peripherally disposed mounting clips and bonded to this surface to provide substantially all the mechanical support for the blank in a direction normal to the major faces of the resonator blank, while being flexible in the directions parallel to said major faces so as to minimize radial stresses on the resonator blank, particularly during thermal cycling of the resonator assembly. The clips are fabricated of a low thermal expansion material, such as molybdenum, which also has considerable yield strength after exposure to processing temperatures; the bonding of the clips to the edges of the resonator blank can be achieved by a polyimide containing electrically conductive particles.

  1. Automated inspection of solder joints for surface mount technology

    NASA Technical Reports Server (NTRS)

    Savage, Robert M.; Park, Hyun Soo; Fan, Mark S.

    1993-01-01

    Researchers at NASA/GSFC evaluated various automated inspection systems (AIS) technologies using test boards with known defects in surface mount solder joints. These boards were complex and included almost every type of surface mount device typical of critical assemblies used for space flight applications: X-ray radiography; X-ray laminography; Ultrasonic Imaging; Optical Imaging; Laser Imaging; and Infrared Inspection. Vendors, representative of the different technologies, inspected the test boards with their particular machine. The results of the evaluation showed limitations of AIS. Furthermore, none of the AIS technologies evaluated proved to meet all of the inspection criteria for use in high-reliability applications. It was found that certain inspection systems could supplement but not replace manual inspection for low-volume, high-reliability, surface mount solder joints.

  2. Dynamics and control simulation of the Spacelab Experiment Pointing Mount

    NASA Technical Reports Server (NTRS)

    Marsh, E. L.; Ward, R. S.

    1977-01-01

    Computer simulations were developed to evaluate the performance of four Experiment Pointing Mounts (EPM) being considered for Spacelab experiments in the 1980-1990 time frame. The system modeled compromises a multibody system consisting of the shuttle, a mechanical isolation device, the EPM, celestial and inertial sensors, bearings, gimbal torque motors and associated nonlinearities, the experiment payload, and control and estimator algorithms. Each mount was subjected to a common disturbance (shuttle vernier thruster firing and man push off) and command (stellar pointing or solar raster scan) input. The fundamental limitation common to all mounts was found to be sensor noise. System dynamics and hardware nonlinearities have secondary effects on pointing performance for sufficiently high bandwidth.

  3. Concentrating Solar Panels: Bringing the Highest Power and Lowest Cost to the Rooftop

    SciTech Connect

    Michael Deck; Rick Russell

    2010-01-05

    Soliant Energy is a venture-capital-backed startup focused on bringing advanced concentrating solar panels to market. Our fundamental innovation is that we are the first company to develop a racking solar concentrator specifically for commercial rooftop applications, resulting in the lowest LCOE for rooftop electricity generation. Today, the commercial rooftop segment is the largest and fastest-growing market in the solar industry. Our concentrating panels can make a major contribution to the SAI's objectives: reducing the cost of solar electricity and rapidly deploying capacity. Our commercialization focus was re-shaped in 2009, shifting from an emphasis solely on panel efficiency to LCOE. Since the inception of the SAI program, LCOE has become the de facto standard for comparing commercial photovoltaic systems. While estimation and prediction models still differ, the emergence of performance-based incentive (PBI) and feed-in tariff (FIT) systems, as well as power purchase agreement (PPA) financing structures make LCOE the natural metric for photovoltaic systems. Soliant Energy has designed and demonstrated lower-cost, higher-power solar panels that consists of 6 (500X) PV module assemblies utilizing multi-junction cells and an integrated two-axis tracker. In addition, we have designed and demonstrated a prototype 1000X panel assembly with 8. Cost reductions relative to conventional flat panel PV systems were realized by (1) reducing the amount of costly semiconductor material and (2) developing strategies and processes to reduce the manufacturing costs of the entire system. Performance gains against conventional benchmarks were realized with (1) two-axis tracking and (2) higher-efficiency multi-junction PV cells capable of operating at a solar concentration ratio of 1000X (1000 kW/m2). The program objectives are: (1) Develop a tracking/concentrating solar module that has the same geometric form factor as a conventional flat, roof mounted photovoltaic (PV) panel - the Soliant module will produce more power and cost less than conventional panels of the same size; (2) Target LCOE: $0.079/kWh in 2010; (3) Target efficiency - 26% in 2010 (22% for 2008 prototype, 24% for 2009 pilot); and (4) Target performance - equivalent to 650Wp in 2010 (490W for 2008 prototype, 540W for 2009 pilot).

  4. Improved Cryostat for Cooling a Wide Panel

    NASA Technical Reports Server (NTRS)

    Clifton, W. B.

    2004-01-01

    An improved cryostat has been developed for cooling a wide panel evenly over its surface to a temperature of -423 F (approximately equal to -253 C) by use of liquid helium. Originally, the cryostat was to be used in measuring apparent strains in wide aluminum/lithium panels as functions of temperature in order to develop data for temperature compensation of the readings of strain gauges on a tank containing liquid hydrogen. Relative to the cryostat used previously for this purpose, the improved cryostat can be prepared for a test in less time, and it loses less helium during each test. Each wide panel to be tested is instrumented with thermocouples in preparation for a test. The previous cryostat was made of two aluminum halves that, for each test, were sandwiched together and sealed around the instrumented wide panel to be tested. The panel was thus enclosed in a plenum. The cryostat and adjacent panel areas protruding from the cryostat were then coated with a thermally insulating foam. During a test, liquid helium was made to flow into the plenum through a port on the bottom. The helium vaporized and expanded, filling the plenum with cold helium gas, which eventually flowed out of the plenum through a port on the top. The nature of the flow was such that a significant portion of the helium did not come into contact with the wide panel; hence, cooling was less efficient than it might otherwise have been. After completion of each test, the foam and the cryostat were separated from the panel. The cryostat was cleaned and prepared for installation on another instrumented wide panel for the next test. It took 28 hours to install the cryostat onto the instrumented panel, apply the foam, and perform ancillary operations in preparation for a test. The volume of liquid helium consumed during each test was 750 liters. The improved cryostat (see figure) includes an upper section and a lower section, both of which include permanent housings made of a thermally insulating foam 2-in. (approximately equal to 5-cm) thick. A liquid-helium- injection manifold is attached to the inside of the top section. The bottom section includes an outlet for helium gas. The manifold contains slots that, when the cryostat is installed on the panel, are located approximately 1 in. (approximately equal to 2.5 cm) from the wide panel. The array of slots spans a substantial portion of the area of the panel. The top and bottom sections of the cryostat are sealed to the panel by use of polytetrafluoroethylene cord and aluminum tape. Liquid helium is fed into the manifold from the top. The helium leaves the manifold through the slots and thus impinges directly on the panel. Hence, all the helium entering the cryostat must come into contact with the panel before leaving the cryostat. After a test, the cryostat is removed from the panel and reinstalled onto another panel for the next test. Installation of the cryostat on an instrumented panel takes a negligible amount of time, in comparison with the 28 hours associated with the previous cryostat. The amount of liquid helium consumed during a test in the improved cryostat is 500 liters - 250 liters less than before.

  5. Development and characterization for the automated surface mount assembly

    SciTech Connect

    Yerganian, S.S.; Grice, J.V.

    1996-11-01

    Development of the ability to automatically assemble surface mount devices on circuits is described, including the characterization of the assembly process and improvements made to the system to increase the accuracy and repeatability of this process. The accuracy and repeatability of the system were characterized by measurements of the individual system components as well as the actual placement of components on a specially designed gauge. The forces and stresses experienced by the components when handled by the system were analyzed. The ability to deliver surface mount components to the system was developed by the design and development of stick magazines, vibratory feeders, a feeder control system, and an automatic stick magazine loader.

  6. Mount St. Helens Before, During, and After (WMS)

    NSDL National Science Digital Library

    Stuart Snodgrass

    2005-03-02

    Mount St. Helens erupted on May 18, 1980, devastating more than 150 square miles of forest in southwestern Washington state. This animation shows Landsat images of the Mount St. Helens area in 1973, 1983, and 2000, illustrating the destruction and regrowth of the forest. The 1983 image clearly shows the new crater on the northern slope where the eruption occurred, the rivers and lakes covered with ash, and the regions of deforestation. The 2000 image, taken twenty years after the eruption, still shows the changed crater, but much of the devastated area is covered by new vegetation growth.

  7. Psychiatric reactions to disaster: the Mount St. Helens experience.

    PubMed

    Shore, J H; Tatum, E L; Vollmer, W M

    1986-05-01

    Following the 1980 Mount St. Helens volcanic eruption, psychiatric reactions were studied in the disaster area and in a control community. Using the new criterion-based diagnostic method for psychiatric epidemiologic research, the Diagnostic Interview Schedule, the authors found a significant prevalence of disaster-related psychiatric disorders. These Mount St. Helens disorders included depression, generalized anxiety, and posttraumatic stress reaction. There was a progressive "dose-response" relationship in the comparison of control, low-exposure, and high-exposure groups. The dose-response pattern occurred among both the bereaved and the property-loss victims. PMID:3963245

  8. Anatomy of the Mount Isa Fault system: thrust exhumation of middle crustal elements of the Mount Isa Rift basement during the late Isan Orogeny

    Microsoft Academic Search

    R. J. Holcombe; R. Gordon; C. Pratt; M. Carder

    The contractional Isan Orogeny in the Mount Isa Inlier of western Queensland, is generally regarded as a multiphase event spread episodically over a ~100 my interval from ~1600 Ma to ~1500 Ma. It terminated a protracted extensional interval in which rocks of the Haslingdon and Mount Isa Groups accumulated in the superposed Leichhardt River and Mount Isa Rifts at ~1800

  9. 29 CFR 1990.104 - Scientific review panel.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...CLASSIFICATION, AND REGULATION OF POTENTIAL OCCUPATIONAL CARCINOGENS General § 1990.104 Scientific review panel. ...classification, or regulation of any potential occupational carcinogen. (b) Membership. The panel will consist...

  10. 29 CFR 1990.104 - Scientific review panel.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...CLASSIFICATION, AND REGULATION OF POTENTIAL OCCUPATIONAL CARCINOGENS General § 1990.104 Scientific review panel. ...classification, or regulation of any potential occupational carcinogen. (b) Membership. The panel will consist...

  11. 29 CFR 1990.104 - Scientific review panel.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...CLASSIFICATION, AND REGULATION OF POTENTIAL OCCUPATIONAL CARCINOGENS General § 1990.104 Scientific review panel. ...classification, or regulation of any potential occupational carcinogen. (b) Membership. The panel will consist...

  12. 29 CFR 1990.104 - Scientific review panel.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...CLASSIFICATION, AND REGULATION OF POTENTIAL OCCUPATIONAL CARCINOGENS General § 1990.104 Scientific review panel. ...classification, or regulation of any potential occupational carcinogen. (b) Membership. The panel will consist...

  13. 29 CFR 1990.104 - Scientific review panel.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...CLASSIFICATION, AND REGULATION OF POTENTIAL OCCUPATIONAL CARCINOGENS General § 1990.104 Scientific review panel. ...classification, or regulation of any potential occupational carcinogen. (b) Membership. The panel will consist...

  14. Combined load test apparatus for flat panels

    NASA Astrophysics Data System (ADS)

    McWithey, Robert R.; Martin, Carl J., Jr.; Cerro, Jeffrey A.

    1992-04-01

    Future hypersonic aircraft such as the National Aero-Space Plane and a high speed civil transport will require the design and use of efficient, highly-loaded, flat structural panels to achieve mission requirements. These panels will be subjected to severe combinations of in-plane mechanical distributed loads (i.e., normal loads in two perpendicular directions plus a shear load), in addition to pressure and thermal loads. A testing apparatus is provided for applying uniform combined in-plane stresses to a flat panel containing an interior test area. Actuators cause two sets of load rods to apply loads to the edge of the flat panel. The first set applies loads which are perpendicular to and independent of the loads applied by the second set. The loads are applied according to a cosine load distribution to obtain a uniform stress field within the test area. The flat panel may be rotated with respect to the applied loads to obtain a wide range of combined stresses in the test area. Movement outside the plane of the flat panel may be selectively prevented by connecting the flat panel to a restraining disk by support rods. The support rods then define the test area. A thermal load may be applied to one side of the flat panel and a pressure load may be applied to the other side. The novelty of this method is found in providing a testing apparatus which allows mechanical, thermal and pressure loads to be applied simultaneously to a flat panel for testing purposes.

  15. The influence of depth of focus on visibility of monocular head-mounted display symbology in simulation and training applications

    NASA Astrophysics Data System (ADS)

    Winterbottom, Marc D.; Patterson, Robert; Pierce, Byron J.; Covas, Christine; Winner, Jennifer

    2005-05-01

    The Joint Helmet Mounted Cueing System (JHMCS),is being considered for integration into the F-15, F-16, and F-18 aircraft. If this integration occurs, similar monocular head-mounted displays (HMDs) will need to be integrated with existing out-the-window simulator systems for training purposes. One such system is the Mobile Modular Display for Advanced Research and Training (M2DART), which is constructed with flat-panel rear-projection screens around a nominal eye-point. Because the panels are flat, the distance from the eye point to the display screen varies depending upon the location on the screen to which the observer is directing fixation. Variation in focal distance may create visibility problems for either the HMD symbology or the out-the-window imagery presented on the simulator rear-projection display screen because observers may not be able to focus both sets of images simultaneously. The extent to which blurring occurs will depend upon the difference between the focal planes of the simulator display and HMD as well as the depth of focus of the observer. In our psychophysical study, we investigated whether significant blurring occurs as a result of such differences in focal distances and established an optimal focal distance for an HMD which would minimize blurring for a range of focal distances representative of the M2DART. Our data suggest that blurring of symbology due to differing focal planes is not a significant issue within the range of distances tested and that the optimal focal distance for an HMD is the optical midpoint between the near and far rear-projection screen distances.

  16. Design for SOP AMOLED display panel

    NASA Astrophysics Data System (ADS)

    Ma, Hai-Ying; Xu, Bu-Heng; Wu, Chun-Ya; Meng, Zhi-Guo; Xiong, Shao-Zhen; Zhang, Li-Zhu

    2005-07-01

    A novel full color SOP (system on panel) AMOLED display based on the MIUC polycrystalline silicon TFT technique, and a new control circuit for the panel, which can deal with both VGA and DVI input signals have been developed. To realize gray-scale a sub-frame technique has been designed and implemented by FPGA device, in which an I2C module has been inserted. Through actual circuit, the whole design has been proven and the advantages of the SOP AMOLED display panel have been confirmed.

  17. Flat or curved thin optical display panel

    DOEpatents

    Veligdan, J.T.

    1995-01-10

    An optical panel includes a plurality of waveguides stacked together, with each waveguide having a first end and an opposite second end. The first ends collectively define a first face, and the second ends collectively define a second face of the panel. The second face is disposed at an acute face angle relative to the waveguides to provide a panel which is relatively thin compared to the height of the second face. In an exemplary embodiment for use in a projection TV, the first face is substantially smaller in height than the second face and receives a TV image, with the second face defining a screen for viewing the image enlarged. 7 figures.

  18. Supersonic flutter of composite sandwich panels

    NASA Astrophysics Data System (ADS)

    Shiau, Le-Chung

    1992-12-01

    A flutter-motion equation is presently derived for a 2D composite sandwich panel considering the total lateral displacement of the plate as the sum of the displacement due to bending of the plate, and that which is due to shear deformation at the core. The effects of core thickness and stacking sequence of the faces on the flutter boundary of the plate are discussed; it is shown that the sandwich panel greatly improves the flutter boundary over that of a composite laminate panel, provided it has sufficient core thickness.

  19. Development of a plasma panel radiation detector

    E-print Network

    R. Ball; J. R. Beene; M. Ben-Moshe; Y. Benhammou; R. Bensimon; J. W. Chapman; E. Etzion; C. Ferretti; P. S. Friedman; D. S. Levin; Y. Silver; R. L. Varner; C. Weaverdyck; R. Wetzel; B. Zhou; T. Anderson; K. McKinny; E. H. Bentefour

    2014-06-14

    This article reports on the development and experimental results of commercial plasma display panels adapted for their potential use as micropattern gas radiation detectors. The plasma panel sensors (PPS) design an materials include glass substrates, metal electrodes and inert gas mixtures which provide a physically robust, hermetically-sealed device. Plasma display panels used as detectors were tested with cosmic ray muons, beta rays and gamma rays, protons and thermal neutrons. The results demonstrated rise times and time resolution of a few nanoseconds, as well as sub-millimeter spatial resolution compatible with the pixel pitch.

  20. The next generation of solar panel substrates?

    SciTech Connect

    Gledhill, K.M.; Boswell, R.L.; Paul, J.G.; Kim, T.D. [Air Force Phillips Lab., Albuquerque, NM (United States)

    1995-12-31

    For over 25 years, satellite power system designers have used rigid honeycomb panels as solar array substrates. Those years have seen very little improvement in the performance of these rigid systems. A new technology under development at the Phillips Laboratory, however, may undo this stagnancy. Composite isogrid panel structures offer a number of potential advantages over honeycomb sandwich structures for solar array applications, including stiffness, weight, and cost improvements. Phillips Laboratory will be performing a series of evaluative tests on the isogrid structure to determine its suitability as a substitute for honeycomb sandwiches in solar panel applications. Testing will include three-point bending, thermal vacuum, and thermal cycling.

  1. Development of a plasma panel radiation detector

    E-print Network

    Ball, R; Ben-Moshe, M; Benhammou, Y; Bensimon, R; Chapman, J W; Etzion, E; Ferretti, C; Friedman, P S; Levin, D S; Silver, Y; Varner, R L; Weaverdyck, C; Wetzel, R; Zhou, B; Anderson, T; McKinny, K; Bentefour, E H

    2014-01-01

    This article reports on an investigation of a radiation detector based on plasma display panel technology. The plasma panel sensor (PPS) is a variant of micropattern gas radiation detectors. PPS components are non-reactive and intrinsically radiation-hard materials, such as glass substrates, metal electrodes and inert gas mixtures. Plasma display panels used as detectors were tested with cosmic ray muons, beta rays and gamma rays, protons, and thermal neutrons. The results demonstrated risetimes and time resolution of a few nanoseconds, as well as spatial resolution compatible with the pixel pitch.

  2. Community advisory panels: Identifying the issues

    SciTech Connect

    Heller, K.

    1992-12-09

    From the outset, the establishment of community advisory panels (CAPs) has encompassed the spirit and the practice of Responsible Care. In the course of setting up and meeting with their panels, companies have been able to gauge the concern of their neighbors, act to address those concerns, and then spread the word. So far, out of about 2,000 sites where Chemical Manufacturers Association (CMA; Washington) members run their operations, 160 CAPs have been formed. About 90% of the sites do not have such an advisory group - even leaving aside sites isolated from communities, and taking account of panels shared by several plants.

  3. Mount St. Helens Fault Gouge - Textural Constraints on Deformation Mechanisms

    Microsoft Academic Search

    K. Cashman; S. Cashman; J. Baldwin; J. Pallister

    2007-01-01

    An unusual feature of the 2004-2006 eruptive activity of Mount St. Helens (MSH) has been the continuous growth of successive spines that are mantled by a zone 1-3 m thick composed of breccia, cataclasite and fault gouge. Individual fragments are holocrystalline, indicating that crystallization of the ascending magma preceded gouge formation. Here we examine both the transformation of solid dacite

  4. Near field magnetic communications for helmet-mounted display applications

    Microsoft Academic Search

    Mark Field; Alan Sailer

    2005-01-01

    Helmet-mounted displays need a data feed that is typically provided by a cable or RF wireless data link to an external computer. In defense applications these solutions are problematic: a cable gets in the way and restricts use and emergency egress, while an RF wireless link can be detected at some distance giving away position and is susceptible to jamming.

  5. 62. SIXTEEN INCH GUN MOUNTED ON THE MACHINING LATHE; LOOKING ...

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

    62. SIXTEEN INCH GUN MOUNTED ON THE MACHINING LATHE; LOOKING WSW. THE GUN ITSELF EXTENDS BEYOND THE BRICK ARCHES OF THE MAIN SHOP FLOOR'S W WALL AND INTO THE W AISLE. THE LATHE'S CUTTING HEAD CAN BE SEEN AT THE RIGHT CENTER OF THE VIEW. (Ryan) - Watervliet Arsenal, Building No. 110, Hagner Road between Schull & Whittemore Roads, Watervliet, Albany County, NY

  6. View forward of five inch gun mounted in sponson; note ...

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

    View forward of five inch gun mounted in sponson; note glass windows which would be removed in combat, gudgeons below window allowed attachment of armor plate which could be swung up to protect gun crew in battle; also note lower section of flag rack at top left center of photograph. (p39) - USS Olympia, Penn's Landing, 211 South Columbus Boulevard, Philadelphia, Philadelphia County, PA

  7. Monitoring Air Flow Through a Machine-Mounted Dust Scrubber

    Microsoft Academic Search

    Charles D. Taylor; Paul D. Kovscek; Edward D. Thimons

    1996-01-01

    On mining sections using blowing ventilation, a machine-mounted scrubber is often required to maintain face dust levels below 2 mg\\/m. The quantity of airborne dust entering a scrubber is directly related to the quantity of air drawn through the scrubber. Due to loading of the scrubber filter, scrubber air flow can decrease significantly during mining. Excessive loading can also cause

  8. Whole Mount In Situ Hybridization On Mouse Embryos

    E-print Network

    De Robertis, Eddy M.

    Whole Mount In Situ Hybridization On Mouse Embryos Modified by Lise Zakin and Eddy De Robertis 2008 Henrique et al., 1995. Nature 375, 787-790. Note: This protocol works well for embryos up to 10.5 days post-coïtum (d.p.c.). For older embryos, use in situ on sections. Dissections -Dissect embryos in 1X PBS; remove

  9. In vitro biological effects of volcanic ash from Mount Sakurajima

    Microsoft Academic Search

    Eiji Yano; Akiteru Takeuchi; Shunji Nishii; Akira Koizumi; Alan Poole; Robert C. Brown; Neil F. Johnson; Peter H. Evans; Yasushi Yukiyama

    1985-01-01

    Mount Sakurajima in the south of the Kyushu Island of Japan erupts hundreds of times a year and continuously emits large amounts of ash. More than a million people live under this ash plume, and there is considerable concern about the possible effects of this on their health. We have studied the physicochemical characteristics and in vitro effects of airborne

  10. A rubber mount model. Application to automotive equipment suspension

    E-print Network

    Paris-Sud XI, Université de

    A rubber mount model. Application to automotive equipment suspension B. Thomas1, 2 , L. Manin1.manin@insa-lyon.fr Abstract In order to predict the nonlinear dynamic response of automotive equipment supported by rubber identification of the model. The application concerns the suspension of an automotive engine cooling module. 1

  11. Learning from Mount St. Helens: Catastrophic Events as Educational Opportunities.

    ERIC Educational Resources Information Center

    Anderson, Jeremy

    1987-01-01

    Maintains that the study of catastrophic events should be given temporary precedence over the normal curriculum in order to help students understand the causes, consequences, and recovery alternatives, deal with trauma, and allay fear of recurrence and feelings of helplessness. Uses the May 1980 eruption of Mount St. Helens to demonstrate how…

  12. Trajectories of the Mount St. Helens eruption plume

    Microsoft Academic Search

    E. F. DANIELSEN

    1981-01-01

    The plume of the major eruption of Mount St. Helens on 18 May 1980 penetrated 10 to 11 kilometers into the stratosphere, attaining heights of 22 to 23 kilometers. Wind shears rapidly converted the plume from expanding vertical cone to a thin, slightly inclined lamina. The lamina was extruded zonally in the stratosphere as the lower part moved eastward at

  13. Pulmonary toxicity of Mount St. Helens volcanic ash

    SciTech Connect

    Sanders, C.L.; Gelman, A.; Conklin, A.; Adee, R.R.

    1980-01-01

    The distribution, clearance, translocation and pathobiology of intratracheally instilled (IT) Mount St. Helens volcanic ash samples are discussed and compared with NIOSH quartz and Ritzville sandy loam samples as positive controls and saline as a negative control. Comparisons are also made with similar studies in rats using chrysotile asbestos, beryllium oxide and cadmium oxide.

  14. Mount St. Helens related aerosol properties from solar extinction measurements

    SciTech Connect

    Michalsky, J.J.; Kleckner, E.W.; Stokes, G.M.

    1980-11-01

    The optical extinction due to the introduction of aerosols and aerosol-precursors into the troposphere and stratosphere during the major eruptive phase of Mount St. Helens, Washington, is quantified. The concentration is on the two-week period centered on the major eruption of 22 July 1980. (ACR)

  15. Air pressure waves from Mount St. Helens eruptions

    Microsoft Academic Search

    Jack W. Reed

    1987-01-01

    Weather station barograph records as well as infrasonic recordings of the pressure wave from the Mount St. Helens eruption of May 18, 1980, have been used to estimate an equivalent explosion airblast yield for this event. Pressure amplitude versus distance patterns in various directions compared with patterns from other large explosions, such as atmospheric nuclear tests, the Krakatoa eruption, and

  16. Vesiculation of May 18, 1980, Mount St. Helens magma

    Microsoft Academic Search

    Caroline Klug; Katharine V. Cashman

    1994-01-01

    The May 18, 1980, eruption of Mount St. Helens, Washington, produced both white and gray pumice, similar in composition but varying in phenocryst, microlite, and vesicle content. The white pumice has fewer phenocrysts, no microlites, and higher vesicularity, and is thus less dense than the gray. In addition, vesicles in the white pumice are larger and more interconnected than those

  17. Characterization of aerosols from eruptions of Mount St. Helens

    Microsoft Academic Search

    R. L. Chuan; D. C. Woods; M. P. McCormick

    1981-01-01

    Measurements of mass concentration and size distribution of aerosols from eruptions of Mount St. Helens as well as morphological and elemental analyses were obtained between 7 April and 7 August 1980. In situ measurements were made in early phreatic and later, minor phreatomagmatic eruption clouds near the vent of the volcano and in plumes injected into the stratosphere from the

  18. Geochemical Precursors to Volcanic Activity at Mount St. Helens, USA

    Microsoft Academic Search

    Kim Berlo; Jon Blundy; Simon Turner; Kathy Cashman; Chris Hawkesworth; Stuart Black

    2004-01-01

    The importance of the interplay between degassing and crystallization before and after the eruption of Mount St. Helens (Washington, USA) in 1980 is well established. Here, we show that degassing occurred over a period of decades to days before eruptions and that the manner of degassing, as deduced from geochemical signatures within the magma, was characteristic of the eruptive style.

  19. MONITORING THE EFFECTS OF SEDIMENTATION FROM MOUNT ST. HELENS

    Microsoft Academic Search

    Patrick S. O'Brien; Alan D. Donner; David S. Biedenharn; Halls Ferry

    Sedimentation processes from Mount St. Helens eruption affect the channel capacities and morphology of the Toutle and Cowlitz rivers in southwest Washington State. Portland District Corps of Engineers must ensure that flood protection levels are maintained on the lower Cowlitz River at the communities of Longview, Kelso, Lexington, and Castle Rock. Levees, dredging, and Sediment Retention Structure have maintained flood

  20. Fluvial sedimentation following Quaternary eruptions of Mount St. Helens, Washington

    Microsoft Academic Search

    R. J. Janda; D. F Meyer

    1985-01-01

    Depositional records of convulsive volcanic events at Mount St. Helens are in many places obscured by rapid fluvial erosion and deposition close to the volcano. Some major eruptions are recorded primarily by lahars and alluvium deposited tens of kilometers away. About 35 percent of the distinctive hummocky topography of the 1980 North Fork Toutle debris avalanche deposit now resembles an

  1. Alzheimer disease: progress or profit? Claire Mount & Christian Downton

    E-print Network

    Cai, Long

    Alzheimer disease: progress or profit? Claire Mount & Christian Downton Alzheimer disease people worldwide currently have dementia;Alzheimer disease affects about 18 million of them1. Increasing age is the greatest risk factor for Alzheimer disease. Its prevalence approxi- mately doubles every

  2. Interior of small xray room with crane and floor mounted ...

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

    Interior of small x-ray room with crane and floor mounted x-ray machine, view facing south-southeast - U.S. Naval Base, Pearl Harbor, Industrial X-Ray Building, Off Sixth Street, adjacent to and south of Facility No. 11, Pearl City, Honolulu County, HI

  3. Recycling of printed wiring boards with mounted electronic parts

    Microsoft Academic Search

    S. Yokoyama; M. Iji

    1997-01-01

    A practical technology has been developed for the recycling of printed wiring boards (PWBs) with electronic parts mounted on them. The recycling ratio of useful materials recovered from a test PWB with our method was 65%, as compared to 23% with a previous method of refining useful metals from the PWB as a whole. The electronic parts on the PWBs

  4. Recycling of Printed Wiring Boards with Mounted Electronic Components

    Microsoft Academic Search

    M. Iji; S. Yokoyama

    1997-01-01

    Recycling technology for printed wiring boards (PWBs) with mounted electronic components was studied for the purpose of disassembling the boards, recovering useful materials, and reusing these materials. An automatic removal method was developed for the electronic components on the basis of a combination of heating to above the solder melting temperature and applying impacting the shearing forces. Most of the

  5. Unusual pre-Mount Simon geology in Clark County, Ohio

    SciTech Connect

    Richard, B.H.; Wolfe, P.J. (Wright State Univ., Dayton, OH (United States))

    1994-04-01

    A well drilled by Pure Oil Company in 1926 in Clark County, Ohio and seismic sections gathered by Wright State University in 1992 and 1993 in the proximity of that well identify unusual geology below the Mount Simon Sandstone. The pair of perpendicular seismic lines cross about a mile from the well. The well encountered about 365 m of a black phosphatic limestone below the Mount Simon Formation. This is the only well that has encountered this unit in Ohio. On each seismic section the pre-Mount Simon surface is irregular with as much as 100 m of relief. Below this surface about 2,000 m of layered rocks, that include the limestone at the top, show onlap to the north suggesting the filling of a basin. The units beneath this sequence of rocks are reverse faulted and dip to the west. When the Clark County seismic sections are compared to recent seismic data to the south in Clinton and Greene Counties similar features are observed. The authors believe the following sequence of events occurred. There was substantial faulting in the late Proterozoic to produce the westward dips and the irregular surface on which the overlying sequence of layered rocks was deposited. Then prior to deposition of the Mount Simon Sandstone, subareal erosion occurred producing a karst surface with at least 100 m relief.

  6. AVIAN NESTLING PREDATION BY ENDANGERED MOUNT GRAHAM RED SQUIRREL

    Microsoft Academic Search

    Claire A. Zugmeyer; John L. Koprowski

    2007-01-01

    Studies using artificial nests or remote cameras have documented avian predation by red squirrels (Tamiasciurus hudsonicus). Although several direct observations of avian predation events are known in the northern range of the red squirrel distribution, no accounts have been reported in the southern portion. We observed predation upon a hermit thrush (Catharus guttatus) nestling by the Mount Graham red squirrel

  7. Student Contributions to Understanding Conservation and Community on Mount Kilimanjaro

    ERIC Educational Resources Information Center

    Durrant, Jeffrey O.; Durrant, Marie B.; Jackson, Mark W.

    2004-01-01

    University students participated in a research project on communities and conservation on Mount Kilimanjaro in Tanzania. Students contributed by gathering data with various methods that will be compiled in a GIS. Living in three villages at different elevations on the mountain, students facilitated GPS mapping, a random survey of over 90…

  8. Critical parameters for reliable surface mounting of high pincount packages

    Microsoft Academic Search

    Bruce L. Euzent; Bruce K. Kawanami; Sam Lau

    1998-01-01

    There have been numerous studies of delamination induced failures after reflow soldering of surface mount devices. However, most of these studies have concentrated on packages with less than 100 pins with die smaller than 100 mm\\/sup 2\\/. In this paper, we examine the failure mechanism associated with larger die in plastic quad flatpacks (PQFPs) and thermally enhanced PQFPs with up

  9. Satellite-Mounted Light Sources as Photometric Calibration Standards

    Microsoft Academic Search

    Justin Albert; Kristie Foster; James Battat; Grace Dupuis; Kyle Fransham; Kristin Koopmans; Michael Jarrett

    2009-01-01

    A significant and growing portion of systematic error on a number of fundamental parameters in astrophysics and cosmology is due to uncertainties from absolute photometric and flux standards. A path toward achieving major reduction in such uncertainties may be provided by satellite-mounted light sources, resulting in improvement in the ability to precisely characterize atmospheric extinction, and thus helping to usher

  10. Installation of surface-mounted flat-conductor cable

    NASA Technical Reports Server (NTRS)

    Carden, J. R.

    1976-01-01

    Guide describes step-by-step process for installation of interior surface-mounted FCC used in commerical and residential buildings. Photographs illustrate how cable-riser and baseboard covers are installed as well as receptacle assembly and receptacle-cover replacement.

  11. DIRECT EFFECTS OF FIRE ON ENDANGERED MOUNT GRAHAM RED SQUIRRELS

    Microsoft Academic Search

    John L. Koprowski; Katherine M. Leonard; Claire A. Zugmeyer; Julia L. Jolley; Cody W. Edwards

    2006-01-01

    Direct mortality of forest wildlife due to fire is rarely documented. In June and July 2004, the Nuttall Complex Fire burned 11,898 ha in the Pinaleno Mountains, southeastern Ari- zona. Portions of these mountains serve as the only habitat of endangered Mount Graham red squirrels (Tamiasciurus hudsonicus grahamensis). Survival of radio-collared red squirrels over a pe- riod that included the

  12. Closeup view of subarray driver module, mounted on girder at ...

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

    Closeup view of sub-array driver module, mounted on girder at back of array - Beale Air Force Base, Perimeter Acquisition Vehicle Entry Phased-Array Warning System, Techinical Equipment Building, End of Spencer Paul Road, north of Warren Shingle Road (14th Street), Marysville, Yuba County, CA

  13. 4. PULLEY SYSTEM AND CABLE FOR GATELIFTING MECHANISM, MOUNTED ABOVE ...

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

    4. PULLEY SYSTEM AND CABLE FOR GATE-LIFTING MECHANISM, MOUNTED ABOVE THE THREE GATE OPENINGS, LOOKING SOUTH/SOUTHEAST. - Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gates & Gate-Lifting Mechanisms, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

  14. Room temperature DNA storage with slide-mounted Aphid specimens

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Most of the conventional molecular studies of aphids destroy the specimen in order to extract DNA. This DNA is subsequently stored in low temperature freezers. Room temperature storage of DNA with microscope slide-mounted voucher material is demonstrated by developing a system that uses filter pa...

  15. Butterflies (Lepidoptera: Papilionoidea) of Mount Kilimanjaro: introduction and family Papilionidae

    Microsoft Academic Search

    Steven D. Liseki; Richard I. Vane-Wright

    2011-01-01

    This article marks the beginning of a short series on the butterfly fauna of Mount Kilimanjaro. It commences with a brief overview of the topography, tectonic history, climate, ecological zonation and conservation significance of Africa's highest mountain. Following an introductory account to the butterfly fauna, the rest of this paper presents an annotated checklist of the swallowtails (Papilionidae). Eight papilionid

  16. Adjustable bipod flexures for mounting mirrors in a space telescope.

    PubMed

    Kihm, Hagyong; Yang, Ho-Soon; Moon, Il Kweon; Yeon, Jeong-Heum; Lee, Seung-Hoon; Lee, Yun-Woo

    2012-11-10

    A new mirror mounting technique applicable to the primary mirror in a space telescope is presented. This mounting technique replaces conventional bipod flexures with flexures having mechanical shims so that adjustments can be made to counter the effects of gravitational distortion of the mirror surface while being tested in the horizontal position. Astigmatic aberration due to the gravitational changes is effectively reduced by adjusting the shim thickness, and the relation between the astigmatism and the shim thickness is investigated. We tested the mirror interferometrically at the center of curvature using a null lens. Then we repeated the test after rotating the mirror about its optical axis by 180° in the horizontal setup, and searched for the minimum system error. With the proposed flexure mount, the gravitational stress at the adhesive coupling between the mirror and the mount is reduced by half that of a conventional bipod flexure for better mechanical safety under launch loads. Analytical results using finite element methods are compared with experimental results from the optical interferometer. Vibration tests verified the mechanical safety and optical stability, and qualified their use in space applications. PMID:23142889

  17. Mount Agung Eruption Provides Test of a Global Climatic Perturbation

    Microsoft Academic Search

    James E. Hansen; Wei-Chyung Wang; Andrew A. Lacis

    1978-01-01

    The Mount Agung volcanic eruption in 1963 provides the best-documented global radiative perturbation to the earth's atmosphere currently available. Data on stratospheric aerosols produced by this eruption have been used as input to a model for the atmospheric thermal structure. The computed magnitude, sign, and phase lag of the temperature changes in both the stratosphere and the troposphere are in

  18. Scanned Laser Displays for Head Mounted Displays Douglas E. Holmgren

    E-print Network

    North Carolina at Chapel Hill, University of

    element through a 2D raster pattern to form a 2D image. Such a system would most likely use a laser (or1 Scanned Laser Displays for Head Mounted Displays Douglas E. Holmgren Department of Physics Abstract Technologies applicable toward a display system in which a laser is raster scanned on the viewer

  19. The Telescopes in Education Program at Mount Wilson Observatory.

    ERIC Educational Resources Information Center

    Teare, Scott W.

    1998-01-01

    Describes the Telescopes in Education Program (TIE), an educational outreach project sponsored by the National Aeronautics and Space Administration (NASA) and developed in collaboration with the Mount Wilson Institute which provides data to professionals who may not have access to telescopes. (DDR)

  20. Helmet-Mounted Display Symbology and Stabilization Concepts

    NASA Technical Reports Server (NTRS)

    Newman, Richard L.

    1995-01-01

    The helmet-mounted display (HMD) presents flight, sensor, and weapon information in the pilot's line of sight. The HMD was developed to allow the pilot to retain aircraft and weapon information and to view sensor images while looking off boresight.

  1. Mount Baker-Living with an Active Volcano

    NSDL National Science Digital Library

    This fact sheet discusses the volcanic hazards associated with Washington's Mount Baker. Topics include hazards characteristic of the volcano (lava flows, pyroclastic flows and ash, and lahars), a history of volcanic activity at the mountain, and efforts to monitor and predict future activity.

  2. Maternal mortality at Mount Hope Women's Hospital, Trinidad.

    PubMed

    Roopnarinesingh, S; Ramoutar, P; Bassaw, B

    1991-09-01

    A ten-year survey of the magnitude and causes of obstetrical deaths at Mount Hope revealed a maternal mortality rate of 33.3 per 100,000 live births. The leading causes of death were the hypertensive disorders, and the most common identifiable factors were inadequate antenatal care and substandard clinical management. PMID:1957523

  3. 182. Mount Pisgah Inn. This had been the site of ...

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

    182. Mount Pisgah Inn. This had been the site of a concessionaires since 1919. The first section of the present inn was completed in 1965. Looking west-southwest. - Blue Ridge Parkway, Between Shenandoah National Park & Great Smoky Mountains, Asheville, Buncombe County, NC

  4. Rollin' in Style!: Students Design Bike Mounted Skateboard Racks

    ERIC Educational Resources Information Center

    Massey, Rick

    2008-01-01

    Recognizing the increasing popularity of skateboarding, the author has found a project that teaches design and manufacturing concepts--and, of equal importance, really gets his students motivated. He challenges them to design and build a skateboard rack that mounts easily on a bicycle. The project benefits students by teaching creativity, the…

  5. Whole-Mount Confocal Microscopy for Vascular Branching Morphogenesis

    PubMed Central

    Mukouyama, Yoh-suke; James, Jennifer; Nam, Joseph; Uchida, Yutaka

    2014-01-01

    We introduce a whole-mount immunohistochemistry method for analyzing intricate vascular network formation in mouse embryonic tissues. Laser scanning confocal microscopy with multiple labeling allows for robust imaging of blood and lymphatic vessel branching morphogenesis with excellent resolution. PMID:22222522

  6. AFRICANAMERICAN CAVALRY SOLDIERS AND THEIR MOUNTS ENTER A CORRAL BETWEEN ...

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

    AFRICAN-AMERICAN CAVALRY SOLDIERS AND THEIR MOUNTS ENTER A CORRAL BETWEEN TWO OF THE 1916 STABLES. PHOTOGRAPH IS LOOKING TO THE WEST AND WAS TAKEN IN 1928 (FORT HUACHUCA HISTORICAL MUSEUM, PHOTOGRAPH 1928.00.00.13, PHOTOGRAPHER UNIDENTIFIED, CREATED BY AND PROPERTY OF THE UNITED STATES ARMY) - Fort Huachuca, Cavalry Stables, Clarkson Road, Sierra Vista, Cochise County, AZ

  7. Geologic Map of Mount Mazama and Crater Lake Caldera, Oregon

    USGS Publications Warehouse

    Bacon, Charles R.

    2008-01-01

    Crater Lake partly fills one of the most spectacular calderas of the world, an 8-by-10-km basin more than 1 km deep formed by collapse of the volcano known as Mount Mazama (fig. 1) during a rapid series of explosive eruptions about 7,700 years ago. Having a maximum depth of 594 m, Crater Lake is the deepest lake in the United States. Crater Lake National Park, dedicated in 1902, encompasses 645 km2 of pristine forested and alpine terrain, including the lake itself, virtually all of Mount Mazama, and most of the area of the geologic map. The geology of the area was first described in detail by Diller and Patton (1902) and later by Williams (1942), whose vivid account led to international recognition of Crater Lake as the classic collapse caldera. Because of excellent preservation and access, Mount Mazama, Crater Lake caldera, and the deposits formed by the climactic eruption constitute a natural laboratory for study of volcanic and magmatic processes. For example, the climactic ejecta are renowned among volcanologists as evidence for systematic compositional zonation within a subterranean magma chamber. Mount Mazama's climactic eruption also is important as the source of the widespread Mazama ash, a useful Holocene stratigraphic marker throughout the Pacific Northwest, adjacent Canada, and offshore. A detailed bathymetric survey of the floor of Crater Lake in 2000 (Bacon and others, 2002) provides a unique record of postcaldera eruptions, the interplay between volcanism and filling of the lake, and sediment transport within this closed basin. Knowledge of the geology and eruptive history of the Mount Mazama edifice, greatly enhanced by the caldera wall exposures, gives exceptional insight into how large volcanoes of magmatic arcs grow and evolve. Lastly, the many smaller volcanoes of the High Cascades beyond the limits of Mount Mazama are a source of information on the flux of mantle-derived magma through the region. General principles of magmatic and eruptive processes revealed by the present study have been incorporated not only in scientific investigations elsewhere, but in the practical evaluation of hazards (Bacon and others, 1997b) and geothermal resources (Bacon and Nathenson, 1996) in the Crater Lake region. In addition to papers in scientific journals, field trip guides, and the hazard and geothermal reports, the major product of this long-term study of Mount Mazama is the geologic map. The map is unusual because it portrays bedrock (outcrop), surficial, and lake floor geology. Caldera wall geology is depicted in detail on the accompanying geologic panoramas.

  8. Supersonic Panel Flutter Test Results for Flat Fiber-Glass Sandwich Panels with Foamed Cores

    NASA Technical Reports Server (NTRS)

    Tuovila, W. J.; Presnell, John G., Jr.

    1961-01-01

    Flutter tests have been made on flat panels having a 1/4 inch-thick plastic-foam core covered with thin fiber-glass laminates. The testing was done in the Langley Unitary Plan wind tunnel at Mach numbers from 1.76 t o 2.87. The flutter boundary for these panels was found to be near the flutter boundary of thin metal panels when compared on the basis of an equivalent panel stiffness. The results also demonstrated that the depth of the cavity behind the panel has a pronounced influence on flutter. Changing the cavity depth from 1 1/2 inches to 1/2 inch reduced the dynamic pressure at start of flutter by 40 percent. No flutter was obtained when the spacers on the back of the panel were against the bottom of the cavity.

  9. Heavy-duty oil containment system, pneumatic barrier system. Part I

    Microsoft Academic Search

    Houser

    1971-01-01

    The report presents the results of studies and tests of a pneumatic heavy duty oil containment system. Deployment is accomplished using large Coast Guard vessels or navy salvage ships. The design is intended for long deployment periods. The barrier design described uses a pneumatic curtain to contain the oil. The curtain air is provided by raft mounted compressors in juxtaposition

  10. Bi-directional calibration results for the cleaning of SpectralonTM reference panels

    NASA Astrophysics Data System (ADS)

    Anderson, Nik; Biggar, Stuart F.; Burkhart, Charles J.; Thome, Kurtis J.; Mavko, Matt

    2002-09-01

    The Remote Sensing Group at the University of Arizona uses SpectralonTM (a sintered polytetraflouroethylene-based material) as a white reference source for ground based measurements used in vicarious calibration. These Spectralon panels degrade spectrally and angularly over time due to use in harsh field conditions with their reflectance falling off at shorter wavelengths. This paper examines the effects of sanding on the bi-directional reflectance of Spectralon using measurements in the Remote Sensing Group's calibration lab. The objective is to determine whether the near-Lambertian and spectrally flat nature can be restored through wet sanding with wet/dry sandpaper and de-ionized water. The reference for this method is the hemispherical reflectance of pressed polytetrafluoroethylene (PTFE) powder prepared according to National Institute of Standards and Technology (NIST) directions. The panels and a radiometer are mounted on rotation stages to measure the reflectance factor at different incidence angles for a normal view angle. These measurements are repeated for different panel alignments. Sanding techniques are examined using several grit sizes and strokes.

  11. 78 FR 50451 - Arts Advisory Panel Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-19

    ...approximate; all times are Eastern Daylight Time): Literature (application review): Room 716. This meeting, from 9:00 a.m...portions of meetings are for the purpose of Panel review, discussion, evaluation, and...

  12. 77 FR 49026 - Arts Advisory Panel Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-15

    ...as follows (ending times are approximate): Literature (application review): In room 716. This meeting will be closed...portions of meetings are for the purpose of Panel review, discussion, evaluation, and...

  13. 78 FR 21978 - Arts Advisory Panel Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-12

    ...20506 as follows (ending times are approximate): Literature (application review): In Room 716. This meeting will be closed...portions of meetings are for the purpose of Panel review, discussion, evaluation, and...

  14. 78 FR 42982 - Arts Advisory Panel Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-18

    ...approximate; all times are Eastern Daylight Time): Literature (application review): Room 716. This meeting will be closed. DATES...portions of meetings are for the purpose of Panel review, discussion, evaluation, and...

  15. Solar Technology: Flat Panel Solar Collectors

    NSDL National Science Digital Library

    This brief flash animation gives information on the materials included in a flat panel solar collector as well as the reasons/benefits behind using certain materials. Note that it can be slow to load the first time opening it.

  16. Panel: Standards from the Computer Music Community

    Microsoft Academic Search

    Matthew Wright; Roger Dannenberg; Stephen Pope; Xavier Rodet; Xavier Serra; David Wessel

    This panel discussion will review the standards that the computer music community has produced and how these standards were created, followed by a guided interactive group discussion about future directions for our community in terms of old and new standards.

  17. 78 FR 26399 - Arts Advisory Panel Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-06

    ...is hereby given that two meetings of the Arts Advisory Panel to the National Council on the Arts will be held by teleconference at the Nancy...follows (ending times are approximate): Arts Education (application review): By...

  18. Industry/Utility Interface Panel Introduction 

    E-print Network

    Wright, R. L.

    1989-01-01

    This panel of five represents significant experience in molding and working within the Industry/Utility Interface. We have: Kenneth Breeding-Arkansas Power & Light, Douglas Harger-Union Carbide Corporation, Ancel ...

  19. Robust estimation procedure in panel data model

    NASA Astrophysics Data System (ADS)

    Shariff, Nurul Sima Mohamad; Hamzah, Nor Aishah

    2014-06-01

    The panel data modeling has received a great attention in econometric research recently. This is due to the availability of data sources and the interest to study cross sections of individuals observed over time. However, the problems may arise in modeling the panel in the presence of cross sectional dependence and outliers. Even though there are few methods that take into consideration the presence of cross sectional dependence in the panel, the methods may provide inconsistent parameter estimates and inferences when outliers occur in the panel. As such, an alternative method that is robust to outliers and cross sectional dependence is introduced in this paper. The properties and construction of the confidence interval for the parameter estimates are also considered in this paper. The robustness of the procedure is investigated and comparisons are made to the existing method via simulation studies. Our results have shown that robust approach is able to produce an accurate and reliable parameter estimates under the condition considered.

  20. Uncertainty Analysis of Stiffened Composite Panels

    NASA Technical Reports Server (NTRS)

    Noor, Ahmed K.; Starnes, James H., Jr.; Peters, Jeanne M.

    2000-01-01

    A study is made of the variability in the nonlinear response of three stiffened composite panels associated with variations in their geometric and material parameters. The three panels have a cylindrical skin with either four or five T-shaped stiffeners. Two of the panels have a notch and the third panel has a circular cutout. Hierarchical sensitivity analysis is used to identify the major parameters at the micro-mechanical, layer, laminate and sub-component levels. The major parameters are then taken to be fuzzy parameters, and a fuzzy set analysis is used to determine the range of variation of the response associated with pre-selected variations in the major parameters.

  1. Robust estimation procedure in panel data model

    SciTech Connect

    Shariff, Nurul Sima Mohamad [Faculty of Science of Technology, Universiti Sains Islam Malaysia (USIM), 71800, Nilai, Negeri Sembilan (Malaysia); Hamzah, Nor Aishah [Institute of Mathematical Sciences, Universiti Malaya, 50630, Kuala Lumpur (Malaysia)

    2014-06-19

    The panel data modeling has received a great attention in econometric research recently. This is due to the availability of data sources and the interest to study cross sections of individuals observed over time. However, the problems may arise in modeling the panel in the presence of cross sectional dependence and outliers. Even though there are few methods that take into consideration the presence of cross sectional dependence in the panel, the methods may provide inconsistent parameter estimates and inferences when outliers occur in the panel. As such, an alternative method that is robust to outliers and cross sectional dependence is introduced in this paper. The properties and construction of the confidence interval for the parameter estimates are also considered in this paper. The robustness of the procedure is investigated and comparisons are made to the existing method via simulation studies. Our results have shown that robust approach is able to produce an accurate and reliable parameter estimates under the condition considered.

  2. Panel data analysis of cardiotocograph (CTG) data.

    PubMed

    Horio, Hiroyuki; Kikuchi, Hitomi; Ikeda, Tomoaki

    2013-01-01

    Panel data analysis is a statistical method, widely used in econometrics, which deals with two-dimensional panel data collected over time and over individuals. Cardiotocograph (CTG) which monitors fetal heart rate (FHR) using Doppler ultrasound and uterine contraction by strain gage is commonly used in intrapartum treatment of pregnant women. Although the relationship between FHR waveform pattern and the outcome such as umbilical blood gas data at delivery has long been analyzed, there exists no accumulated FHR patterns from large number of cases. As time-series economic fluctuations in econometrics such as consumption trend has been studied using panel data which consists of time-series and cross-sectional data, we tried to apply this method to CTG data. The panel data composed of a symbolized segment of FHR pattern can be easily handled, and a perinatologist can get the whole FHR pattern view from the microscopic level of time-series FHR data. PMID:23920815

  3. Development of lightweight, fire retardant, low smoke, thermally stable, high strength floor paneling: Passenger floor panels

    NASA Technical Reports Server (NTRS)

    Gorges, F. J.

    1982-01-01

    A fire retardant, low smoke-emitting, thermally stable, light weight sandwich paneling, suitable for high traffic flooring on a passenger aircraft, was evaluated. The material is of sandwich panel construction, with graphite face sheets (a phenolic-vinyl resin) and honeycomb core. The lower side of the paneling is coated with a Fluorel elastomer L-4805, which provides an additional fire barrier, as well as reduced noise transmission.

  4. Phosphors for flat panel emissive displays

    SciTech Connect

    Anderson, M.T.; Walko, R.J.; Phillips, M.L.F.

    1995-07-01

    An overview of emissive display technologies is presented. Display types briefly described include: cathode ray tubes (CRTs), field emission displays (FEDs), electroluminescent displays (ELDs), and plasma display panels (PDPs). The critical role of phosphors in further development of the latter three flat panel emissive display technologies is outlined. The need for stable, efficient red, green, and blue phosphors for RGB fall color displays is emphasized.

  5. Brazed Borsic/aluminum structural panels

    NASA Technical Reports Server (NTRS)

    Bales, T. T.; Wiant, H. R.; Royster, D. M.

    1977-01-01

    A fluxless brazing process has been developed that minimizes degradation of the mechanical properties of Borsic/aluminum composites. The process, which employs 718 aluminum alloy braze, is being used to fabricate full scale Borsic/aluminum-titanium honeycomb-core panels for Mach 3 flight testing on the YF-12 aircraft and ground testing in support of the Supersonic Cruise Aircraft Research (SCAR) Program. The manufacturing development and results of shear tests on full scale panels are presented.

  6. Switched mode piezo-panel driver

    Microsoft Academic Search

    R. J. Slakhorst

    2007-01-01

    Abstract\\u000aThe subject of this thesis is the design of a system which can drive piezo-panels. This system is called the piezo driver. The piezo-panels are used for an Active Noise Cancelling (ANC) system which is being developed to be used inside the cabin of airplanes. The piezo driver fills the gap between the calculating system, which provides the anti-noise

  7. Flat panel ferroelectric electron emission display system

    DOEpatents

    Sampayan, S.E.; Orvis, W.J.; Caporaso, G.J.; Wieskamp, T.F.

    1996-04-16

    A device is disclosed which can produce a bright, raster scanned or non-raster scanned image from a flat panel. Unlike many flat panel technologies, this device does not require ambient light or auxiliary illumination for viewing the image. Rather, this device relies on electrons emitted from a ferroelectric emitter impinging on a phosphor. This device takes advantage of a new electron emitter technology which emits electrons with significant kinetic energy and beam current density. 6 figs.

  8. Flat panel ferroelectric electron emission display system

    DOEpatents

    Sampayan, Stephen E. (Manteca, CA); Orvis, William J. (Livermore, CA); Caporaso, George J. (Livermore, CA); Wieskamp, Ted F. (Livermore, CA)

    1996-01-01

    A device which can produce a bright, raster scanned or non-raster scanned image from a flat panel. Unlike many flat panel technologies, this device does not require ambient light or auxiliary illumination for viewing the image. Rather, this device relies on electrons emitted from a ferroelectric emitter impinging on a phosphor. This device takes advantage of a new electron emitter technology which emits electrons with significant kinetic energy and beam current density.

  9. British General Election Study: Campaign Panel, 1997

    NSDL National Science Digital Library

    Curtice, J.K.

    1998-01-01

    The Inter-university Consortium for Political and Social Research (ICPSR) at the University of Michigan in January 1999 added the election study British General Election Study: Campaign Panel, 1997 to its archive. The British General Election Study: Campaign Panel, 1997 surveyed adults in Great Britain to analyze the interaction between economic and political factors and their influence on election outcomes. The study also examined how the "modernization and professionalization of campaign communications" has affected the media, the voters, and political leaders.

  10. Combined load test apparatus for flat panels

    Microsoft Academic Search

    Robert R. McWithey; Carl J. Martin Jr.; Jeffrey A. Cerro

    1992-01-01

    Future hypersonic aircraft such as the National Aero-Space Plane and a high speed civil transport will require the design and use of efficient, highly-loaded, flat structural panels to achieve mission requirements. These panels will be subjected to severe combinations of in-plane mechanical distributed loads (i.e., normal loads in two perpendicular directions plus a shear load), in addition to pressure and

  11. CLIVAR: Asian-Australian Monsoon Panel

    NSDL National Science Digital Library

    This World Climate Research Programme on Climate Variability and Predictability (CLIVAR) website promotes the Asian-Australian Monsoon Panel's investigations of the annual monsoon cycle and its variability. Researchers can find out about the latest workshops and conferences including the Indian Ocean Modelling Workshop in Hawaii. The site features many Monsoon Panel reports detailing the innumerable monsoon process studies, monitoring activities, and modeling strategies. Visitors can read a few concise articles describing monsoon activity in Asia and Australia.

  12. Neutron shielding panels for reactor pressure vessels

    DOEpatents

    Singleton, Norman R. (Murrysville, PA)

    2011-11-22

    In a nuclear reactor neutron panels varying in thickness in the circumferential direction are disposed at spaced circumferential locations around the reactor core so that the greatest radial thickness is at the point of highest fluence with lesser thicknesses at adjacent locations where the fluence level is lower. The neutron panels are disposed between the core barrel and the interior of the reactor vessel to maintain radiation exposure to the vessel within acceptable limits.

  13. Panel cutting method: new approach to generate panels on a hull in Rankine source potential approximation

    NASA Astrophysics Data System (ADS)

    Choi, Hee-Jong; Chun, Ho-Hwan; Park, Il-Ryong; Kim, Jin

    2011-12-01

    In the present study, a new hull panel generation algorithm, namely panel cutting method, was developed to predict flow phenomena around a ship using the Rankine source potential based panel method, where the iterative method was used to satisfy the nonlinear free surface condition and the trim and sinkage of the ship was taken into account. Numerical computations were performed to investigate the validity of the proposed hull panel generation algorithm for Series 60 (CB=0.60) hull and KRISO container ship (KCS), a container ship designed by Maritime and Ocean Engineering Research Institute (MOERI). The computational results were validated by comparing with the existing experimental data.

  14. Broadband, wide-area active control of sound radiated from vibrating structures using local surface-mounted radiation suppression devices

    NASA Astrophysics Data System (ADS)

    Mason, V. Bradford; Naghshineh, Koorosh; Toth, G. K.

    A new active noise-control device, which offers a practical solution for complex noise problems, has been developed and experimentally evaluated. Noise reduction is achieved by distributing an array of control devices over the surface of the radiating structure (e.g., aircraft fuselage interior). Each device consists of a motion sensor, a control circuit, and a loudspeaker. The control circuits are independent and can be manufactured inexpensively from analog components. The loudspeaker is driven such that it reduces the volume velocity of the radiating structure within its close proximity. Experimental verification of this concept was performed using a uniformly vibrating circular plate with a single device. The controller transfer function was derived and implemented in an analog circuit. Broadband (50-500 Hz) sound reductions in the range of 10-20 dB were achieved over a wide spatial area, including the immediate vicinity of the device. The controller was found to be stable and robust. Since this device in its final implementation may be mounted behind the aircraft trim panels, it was covered by a large, flexible panel. The performance was measured and found to be excellent.

  15. Orbiter radiator panel solar focusing test

    NASA Technical Reports Server (NTRS)

    Howell, H. R.

    1982-01-01

    A test was conducted to determine the solar reflections from the Orbiter radiator panels. A one-tenth scale model of the forward and mid-forward radiator panels in the deployed position was utilized in the test. Test data was obtained to define the reflected one-sun envelope for the embossed silver/Teflon radiator coating. The effects of the double contour on the forward radiator panels were included in the test. Solar concentrations of 2 suns were measured and the one-sun envelope was found to extend approximately 86 inches above the radiator panel. A limited amount of test data was also obtained for the radiator panels with the smooth silver/Teflon coating to support the planned EVA on the Orbiter STS-5 flight. Reflected solar flux concentrations as high as 8 suns were observed with the smooth coating and the one-sun envelope was determined to extend 195 inches above the panel. It is recommended that additional testing be conducted to define the reflected solar environment beyond the one-sun boundary.

  16. Description of Panel Method Code ANTARES

    NASA Technical Reports Server (NTRS)

    Ulbrich, Norbert; George, Mike (Technical Monitor)

    2000-01-01

    Panel method code ANTARES was developed to compute wall interference corrections in a rectangular wind tunnel. The code uses point doublets to represent blockage effects and line doublets to represent lifting effects of a wind tunnel model. Subsonic compressibility effects are modeled by applying the Prandtl-Glauert transformation. The closed wall, open jet, or perforated wall boundary condition may be assigned to a wall panel centroid. The tunnel walls can be represented by using up to 8000 panels. The accuracy of panel method code ANTARES was successfully investigated by comparing solutions for the closed wall and open jet boundary condition with corresponding Method of Images solutions. Fourier transform solutions of a two-dimensional wind tunnel flow field were used to check the application of the perforated wall boundary condition. Studies showed that the accuracy of panel method code ANTARES can be improved by increasing the total number of wall panels in the circumferential direction. It was also shown that the accuracy decreases with increasing free-stream Mach number of the wind tunnel flow field.

  17. Outbrief - Long Life Rocket Engine Panel

    NASA Technical Reports Server (NTRS)

    Quinn, Jason Eugene

    2004-01-01

    This white paper is an overview of the JANNAF Long Life Rocket Engine (LLRE) Panel results from the last several years of activity. The LLRE Panel has met over the last several years in order to develop an approach for the development of long life rocket engines. Membership for this panel was drawn from a diverse set of the groups currently working on rocket engines (Le. government labs, both large and small companies and university members). The LLRE Panel was formed in order to determine the best way to enable the design of rocket engine systems that have life capability greater than 500 cycles while meeting or exceeding current performance levels (Specific Impulse and Thrust/Weight) with a 1/1,OOO,OOO likelihood of vehicle loss due to rocket system failure. After several meetings and much independent work the panel reached a consensus opinion that the primary issues preventing LLRE are a lack of: physics based life prediction, combined loads prediction, understanding of material microphysics, cost effective system level testing. and the inclusion of fabrication process effects into physics based models. With the expected level of funding devoted to LLRE development, the panel recommended that fundamental research efforts focused on these five areas be emphasized.

  18. Strength optimization of metallic sandwich panels subject to bending

    E-print Network

    Zok, Frank

    Strength optimization of metallic sandwich panels subject to bending H.J. Rathbun, F.W. Zok *, A A general methodology for the design of strong, lightweight sandwich panels is described and implemented with the weight of a solid panel. Ã? 2005 Elsevier Ltd. All rights reserved. Keywords: Sandwich panels; Lightweight

  19. Peak-power-point monitor for solar panel

    NASA Technical Reports Server (NTRS)

    Schloss, A. I.

    1972-01-01

    Attempt was made to determine solar cell panel peak power capability without disrupting power flow from panel. Separate solar cell strings were switched from panel circuits, and increasingly larger loads were added rapidly until peak power points were transversed. String wattage output was recorded and all stored string measurements summed together indicate peak power point in panel.

  20. Effect of frangible panels on internal gas pressures

    Microsoft Academic Search

    J. E. Tancreto; E. S. Helseth

    1984-01-01

    A frangible panel in a structure is an exterior surface designed to break lose and blow away quickly enough to limit effects from an explosion inside the structure. Typical frangible panels are lightweight, compared to the surfaces of the structure. Panel connections are designed to offer little resistance in any surfae of the structure. Frangible panels are primarily to limit