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1

Vibration Response Predictions for Heavy Panel Mounted Components from Panel Acreage Environment Specifications  

NASA Technical Reports Server (NTRS)

The development of new launch vehicles in the Aerospace industry often relies on response measurements taken from previously developed vehicles during various stages of liftoff and ascent, and from wind tunnel models. These measurements include sound pressure levels, dynamic pressures in turbulent boundary layers and accelerations. Rigorous statistical scaling methods are applied to the data to derive new environments and estimate the performance of new skin panel structures. Scaling methods have proven to be reliable, particularly for designs similar to the vehicles used as the basis for scaling, and especially in regions of smooth acreage without exterior protuberances or heavy components mounted to the panel. To account for response attenuation of a panel-mounted component due to its apparent mass at higher frequencies, the vibroacoustics engineer often reduces the acreage vibration according to a weight ratio first suggested by Barrett. The accuracy of the reduction is reduced with increased weight of the panel-mounted component, and does not account for low-frequency amplification of the component/panel response as a system. A method is proposed that combines acreage vibration from scaling methods with finite element analysis to account for the frequency-dependent dynamics of heavy panel-mounted components. Since the acreage and mass-loaded skins respond to the same dynamic input pressure, such pressure may be eliminated in favor of a frequency-dependent scaling function applied to the acreage vibration to predict the mass-loaded panel response. The scaling function replaces the Barrett weight ratio, and contains all of the dynamic character of the loaded and unloaded skin panels. The solution simplifies for spatially uncorrelated and fully correlated input pressures. Since the prediction uses finite element models of the loaded and unloaded skins, a rich suite of response data are available to the design engineer, including interface forces, stress and strain, as well as acceleration and displacement. An extension of the method is also developed to incorporate the effect of a local protuberance near a heavy component. Acreage environments from traditional scaling methods with and without protuberance effects serve as the basis for the extension. Authors:

Harrison, Phillip; Frady, Greg; Duvall, Lowery; Fulcher, Clay; LaVerde, Bruce

2010-01-01

2

Solar panel parallel mounting configuration  

NASA Technical Reports Server (NTRS)

A spacecraft includes a plurality of solar panels interconnected with a power coupler and an electrically operated device to provide power to the device when the solar cells are insolated. The solar panels are subject to bending distortion when entering or leaving eclipse. Spacecraft attitude disturbances are reduced by mounting each of the solar panels to an elongated boom made from a material with a low coefficient of thermal expansion, so that the bending of one panel is not communicated to the next. The boom may be insulated to reduce its bending during changes in insolation. A particularly advantageous embodiment mounts each panel to the boom with a single mounting, which may be a hinge. The single mounting prevents transfer of bending moments from the panel to the boom.

Mutschler, Jr., Edward Charles (Inventor)

1998-01-01

3

A Fuzzy-Based Maximum Power Point Tracker for Body Mounted Solar Panels in LEO Satellites  

Microsoft Academic Search

Solar panels are the power subsystem components which provide satellite electrical power. Solar panels characteristics depend on environmental conditions (insolation level, temperature and etc.). In this paper, design and simulation of fuzzy-based MPPT for the body mounted solar panel in a LEO satellite are presented. To show how good the proposed technique is; we applied it into a real system.

M. Taherbaneh; M. B. Menhaj

2007-01-01

4

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

NASA Technical Reports Server (NTRS)

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.

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

2011-01-01

5

Arthroscopic knee surgery using the advanced flat panel high-resolution color head-mounted display  

NASA Astrophysics Data System (ADS)

The first ever deployed arthroscopic knee surgeries have been performed using a high resolution color head-mounted display (HMD) developed under the DARPA Advanced Flat Panel HMD program. THese procedures and several fixed hospital procedures have allowed both the system designers and surgeons to gain new insight into the use of a HMD for medical procedures in both community and combat support hospitals scenarios. The surgeons demonstrated and reported improved head-body orientation and awareness while using the HMD and reported several advantages and disadvantages of the HMD as compared to traditional CRT monitor viewing of the arthroscopic video images. The surgeries, the surgeon's comments, and a human factors overview of HMDs for Army surgical applications are discussed here.

Nelson, Scott A.; Jones, D. E. Casey; St. Pierre, Patrick; Sampson, James B.

1997-06-01

6

A geochemical survey using heavy mineral concentrates in the Mount Belknap caldera vicinity, Utah  

USGS Publications Warehouse

Geochemical surveys of the rocks, heavy-mineral concentrates, and surface and spring waters in the vicinity of the Mount Belknap caldera, Tushar Mountains, west-central Utah, were conducted during the summers of 1978 and 1979. Anomalous concentrations of mostly lithophile elements, particularly niobium, beryllium, lead, yttrium, tin, zinc, manganese, and molybdenum in the magnetic and nonmagnetic fraction of heavy-mineral concentrates derived from stream sediment suggest that late stage, highly differentiated felsic rocks were involved in the eruptive history of the Mount Belknap caldera. Q-mode factor analysis was used to characterize the geochemical assemblages within the survey area, and the areal distribution of high-factor scores associated with mineralization indicates favorable target areas for future exploration. The results of these studies indicate that porphyry-type molybdenum and possible associated vein-type uranium mineralized deposits may exist in or near the Mount Belknap caldera.

Tucker, R.E.; Miller, W. Roger; Motooka, J.M.

1982-01-01

7

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

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.

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

1984-01-01

8

Photovoltaic module mounting system  

DOEpatents

A solar array mounting system having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame. The solar array mounting system includes flexible, pedestal-style feet and structural links connected in a grid formation on the mounting surface. The photovoltaic modules are secured in place via the use of attachment clamps that grip the edge of the typically glass substrate. The panel mounting clamps are then held in place by tilt brackets and/or mid-link brackets that provide fixation for the clamps and align the solar panels at a tilt to the horizontal mounting surface. The tilt brackets are held in place atop the flexible feet and connected link members thus creating a complete mounting structure.

Miros, Robert H. J. (Fairfax, CA); Mittan, Margaret Birmingham (Oakland, CA); Seery, Martin N. (San Rafael, CA); Holland, Rodney H. (Novato, CA)

2012-04-17

9

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

PubMed

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

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

2014-03-10

10

Solar panel  

Microsoft Academic Search

A solar panel has an interior insulated heat storage means, a solar radiation collector wall mounted on a first side of the storage means having a collector surface for exposure to solar radiation, and a heat emitter wall mounted on a second side of the heat storage means opposite the first side having an emitter surface for exposure to a

K. Schmid; G. Wagner

1982-01-01

11

Analysis of the modal energy distribution of an excited vibrating panel coupled with a heavy fluid cavity by a dual modal formulation  

E-print Network

Analysis of the modal energy distribution of an excited vibrating panel coupled with a heavy fluid energies and the total energy of each subsystem. An analysis of modal energy distribution is performed for a light fluid cavity. Keywords: fluid-structure interaction, modal decomposition, heavy fluid, energy

Boyer, Edmond

12

Sharing the rivers: Balancing the needs of people and fish against the backdrop of heavy sediment loads downstream from Mount Rainier, Washington  

NASA Astrophysics Data System (ADS)

Despite heavy sediment loads, large winter floods, and floodplain development, the rivers draining Mount Rainier, a 4,392-m glaciated stratovolcano within 85 km of sea level at Puget Sound, Washington, support important populations of anadromous salmonids, including Chinook salmon and steelhead trout, both listed as threatened under the Endangered Species Act. Aggressive river-management approaches of the early 20th century, such as bank armoring and gravel dredging, are being replaced by more ecologically sensitive approaches including setback levees. However, ongoing aggradation rates of up to 8 cm/yr in lowland reaches present acute challenges for resource managers tasked with ensuring flood protection without deleterious impacts to aquatic ecology. Using historical sediment-load data and a recent reservoir survey of sediment accumulation, rivers draining Mount Rainer were found to carry total sediment yields of 350 to 2,000 tonnes/km2/yr, notably larger than sediment yields of 50 to 200 tonnes/km2/yr typical for other Cascade Range rivers. An estimated 70 to 94% of the total sediment load in lowland reaches originates from the volcano. Looking toward the future, transport-capacity analyses and sediment-transport modeling suggest that large increases in bedload and associated aggradation will result from modest increases in rainfall and runoff that are predicted under future climate conditions. If large sediment loads and associated aggradation continue, creative solutions and long-term management strategies are required to protect people and structures in the floodplain downstream of Mount Rainier while preserving aquatic ecosystems.

Magirl, C. S.; Czuba, J. A.; Czuba, C. R.; Curran, C. A.

2012-12-01

13

House siding solar panel  

Microsoft Academic Search

A house siding solar panel for the efficient conversion of solar radiation into usable heat energy, which includes an aesthetically pleasing housing having forwardly beveled side edges so that the panels may be mounted directly to the side of the house much like conventional siding, and present an aesthetically pleasing appearance. The front wall of the housing is a prismatic

Tennings

1984-01-01

14

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

NASA Astrophysics Data System (ADS)

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.

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

2013-11-01

15

Mirror mount  

DOEpatents

A mirror mount is provided that allows free pitch, yaw and roll motion of the mirror while keeping the location of a point on the surface of the mirror fixed in the rest frame of reference of the mount. Yaw movement is provided by two yaw cylinders that are bearing mounted to provide rotation. Pitch and roll motion is provided by a spherically annular shell that is air bearing mounted to move between a clamp and an upper pedestal bearing. The centers of curvature of the spherical surfaces of the shell lie upon the point. Pitch motion and roll motion are separately and independently imparted to mirror by a pair of pitch paddles and a pair of roll paddles that are independently and separately moved by control rods driven by motors.

Humpal, H.H.

1986-03-21

16

Mirror mount  

DOEpatents

A mirror mount (10) is provided that allows free pitch, yaw and roll motion of the mirror (28) while keeping the location of a point (56) on the surface of the mirror (28) fixed in the rest frame of reference of the mount (10). Yaw movement is provided by two yaw cylinders (30,32) that are bearing (52) mounted to provide rotation. Pitch and roll motion is provided by a spherically annular shell (42) that is air bearing (72,74) mounted to move between a clamp (60) and an upper pedestal bearing (44). The centers of curvature of the spherical surfaces of the shell (42) lie upon the point (56). Pitch motion and roll motion are separately and independently imparted to mirror (28) by a pair of pitch paddles (34) and a pair of roll paddles (36) that are independently and separately moved by control rods (76,80) driven by motors (78,82).

Humpal, Harold H. (San Ramon, CA)

1987-01-01

17

Mirror mount  

DOEpatents

A mirror mount is provided that allows free pitch, yaw and roll motion of the mirror while keeping the location of a point on the surface of the mirror fixed in the rest frame of reference of the mount. Yaw movement is provided by two yaw cylinders that are bearing mounted to provide rotation. Pitch and roll motion is provided by a spherically annular shell that is air bearing mounted to move between a clamp and an upper pedestal bearing. The centers of curvature of the spherical surfaces of the shell lie upon the point. Pitch motion and roll motion are separately and independently imparted to mirror by a pair of pitch paddles and a pair of roll paddles that are independently and separately moved by control rods driven by motors. 5 figs.

Humpal, H.H.

1987-11-10

18

Buckling of a Longitudinally Jointed Curved Composite Panel Arc Segment for Next Generation of Composite Heavy Lift Launch Vehicles: Verification Testing Analysis  

NASA Technical Reports Server (NTRS)

In this work, an all-bonded out-of-autoclave (OoA) curved longitudinal composite joint concept, intended for use in the next generation of composite heavy lift launch vehicles, was evaluated and verified through finite element (FE) analysis, fabrication, testing, and post-test inspection. The joint was used to connect two curved, segmented, honeycomb sandwich panels representative of a Space Launch System (SLS) fairing design. The overall size of the resultant panel was 1.37 m by 0.74 m (54 in by 29 in), of which the joint comprised a 10.2 cm (4 in) wide longitudinal strip at the center. NASTRAN and ABAQUS were used to perform linear and non-linear analyses of the buckling and strength performance of the jointed panel. Geometric non-uniformities (i.e., surface contour imperfections) were measured and incorporated into the FE model and analysis. In addition, a sensitivity study of the specimens end condition showed that bonding face-sheet doublers to the panel's end, coupled with some stress relief features at corner-edges, can significantly reduce the stress concentrations near the load application points. Ultimately, the jointed panel was subjected to a compressive load. Load application was interrupted at the onset of buckling (at 356 kN 80 kips). A post-test non-destructive evaluation (NDE) showed that, as designed, buckling occurred without introducing any damage into the panel or the joint. The jointed panel was further capable of tolerating an impact damage to the same buckling load with no evidence of damage propagation. The OoA cured all-composite joint shows promise as a low mass factory joint for segmented barrels.

Farrokh, Babak; Segal, Kenneth N.; Akkerman, Michael; Glenn, Ronald L.; Rodini, Benjamin T.; Fan, Wei-Ming; Kellas, Sortiris; Pineda, Evan J.

2014-01-01

19

Mirror mount  

DOEpatents

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.

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

1994-01-01

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.

2000-01-01

21

Graphite Composite Panel Polishing Fixture  

NASA Technical Reports Server (NTRS)

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.

Hagopian, John; Strojny, Carl; Budinoff, Jason

2011-01-01

22

Glass/Epoxy Door Panel for Automobiles  

NASA Technical Reports Server (NTRS)

Lightweight panel cost-effective. Integrally-molded intrusion strap key feature of composite outer door panel. Strap replaces bulky and heavy steel instrusion beam of conventional door. Standard steel inner panel used for demonstration purposes. Door redesigned to exploit advantages of composite outer panel thinner. Outer panel for automobilie door, made of glass/epoxy composite material, lighter than conventional steel door panel, meets same strength requirements, and less expensive.

Bauer, J. L. JR.

1985-01-01

23

Concentrating photovoltaic solar panel  

DOEpatents

The present invention relates to photovoltaic power systems, photovoltaic concentrator modules, and related methods. In particular, the present invention features concentrator modules having interior points of attachment for an articulating mechanism and/or an articulating mechanism that has a unique arrangement of chassis members so as to isolate bending, etc. from being transferred among the chassis members. The present invention also features adjustable solar panel mounting features and/or mounting features with two or more degrees of freedom. The present invention also features a mechanical fastener for secondary optics in a concentrator module.

Cashion, Steven A; Bowser, Michael R; Farrelly, Mark B; Hines, Braden E; Holmes, Howard C; Johnson, Jr., Richard L; Russell, Richard J; Turk, Michael F

2014-04-15

24

Magnetic core mounting system  

DOEpatents

A mounting apparatus for an electromagnetic device such as a transformer of inductor includes a generally planar metallic plate as a first heat sink, and a metallic mounting cup as a second heat sink. The mounting cup includes a cavity configured to receive the electromagnetic device, the cavity being defined by a base, and an axially-extending annular sidewall extending from the base to a flange portion of the mounting cup. The mounting cup includes first and second passages for allowing the leads of first and second windings of the electromagnetic device to be routed out of the cavity. The cavity is filled with a polyurethane potting resin, and the mounting cup, including the potted electromagnetic device, is mounted to the plate heat sink using fasteners. The mounting cup, which surrounds the electromagnetic device, in combination with the potting resin provides improved thermal transfer to the plate heat sink, as well as providing resistance to vibration and shocks.

Ronning, Jeffrey J. (Fishers, IN)

2002-01-01

25

Fixed mount wavefront sensor  

DOEpatents

A rigid mount and method of mounting for a wavefront sensor. A wavefront dissector, such as a lenslet array, is rigidly mounted at a fixed distance relative to an imager, such as a CCD camera, without need for a relay imaging lens therebetween.

Neal, Daniel R. (Tijeras, NM)

2000-01-01

26

High bandwidth optical mount  

DOEpatents

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.

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

1994-01-01

27

High bandwidth optical mount  

DOEpatents

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.

Bender, D.A.; Kuklo, T.

1994-11-08

28

Panel flutter  

NASA Technical Reports Server (NTRS)

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.

Dowell, E. H.

1972-01-01

29

Thermistor mount efficiency calibration  

SciTech Connect

Thermistor mount efficiency calibration is accomplished by use of the power equation concept and by complex signal-ratio measurements. A comparison of thermistor mounts at microwave frequencies is made by mixing the reference and the reflected signals to produce a frequency at which the amplitude and phase difference may be readily measured.

Cable, J.W.

1980-05-01

30

Stable mirror mount  

DOEpatents

An improved mirror mount assembly is disclosed. The mirror mount assembly provides a post assembly slidable in a Y-axis orientation and a nut plate assembly slidable in an X-axis orientation and a device for simultaneously locking the post assembly and the key assembly in a fixed position.

Cutburth, Ronald W. (Bulls Gap, TN)

1990-01-01

31

Spherical mirror mount  

NASA Technical Reports Server (NTRS)

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.

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

2011-01-01

32

Optoelectronic Mounting Structure  

DOEpatents

An optoelectronic mounting structure is provided that may be used in conjunction with an optical transmitter, receiver or transceiver module. The mounting structure may be a flexible printed circuit board. Thermal vias or heat pipes in the head region may transmit heat from the mounting structure to the heat spreader. The heat spreader may provide mechanical rigidity or stiffness to the heat region. In another embodiment, an electrical contact and ground plane may pass along a surface of the head region so as to provide an electrical contact path to the optoelectronic devices and limit electromagnetic interference. In yet another embodiment, a window may be formed in the head region of the mounting structure so as to provide access to the heat spreader. Optoelectronic devices may be adapted to the heat spreader in such a manner that the devices are accessible through the window in the mounting structure.

Anderson, Gene R. (Albuquerque, NM); Armendariz, Marcelino G. (Albuquerque, NM); Baca, Johnny R. F. (Albuquerque, NM); Bryan, Robert P. (Albuquerque, NM); Carson, Richard F. (Albuquerque, NM); Chu, Dahwey (Albuquerque, NM); Duckett, III, Edwin B. (Albuquerque, NM); McCormick, Frederick B. (Albuquerque, NM); Peterson, David W. (Sandia Park, NM); Peterson, Gary D. (Albuquerque, NM); Reber, Cathleen A. (Corrales, NM); Reysen, Bill H. (Lafayette, CO)

2004-10-05

33

Solar panel  

Microsoft Academic Search

A highly efficient solar panel ideally suited for use in heating swimming pools, hot tubs and the like, comprising a plurality of elongated, flexible fluid carrying conduits fixedly secured together in a side by side relationship. The conduits are interconnected at their extremities with header members embodying integral compression fittings of unique design. The panel is shipped in a rolled

Wojcik

1983-01-01

34

Mount Jefferson, Oregon  

NSDL National Science Digital Library

This resource about Mount Jefferson, a stratovolcano in the Cascade Range, features links to all aspects of the volcano, including its geographic setting, geologic and eruptive history, and historical information about it. The site explains that Mount Jefferson has erupted repeatedly for hundreds of thousands of years, with its last eruptive episode during the last major glaciation, which culminated about 15,000 years ago. Geologic evidence shows that Mount Jefferson is capable of large explosive eruptions. 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.

35

Laboratory calibration of field reflectance panels  

NASA Technical Reports Server (NTRS)

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.

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

1988-01-01

36

Head Mounted Displays for Medical Use  

Microsoft Academic Search

Head Mounted Displays have been used in various forms to assist surgeons and other medical personnel to support and improve visualization of the work site. Historically, many of these were of inadequate resolution, bulky, cave-like and heavy and they, deservedly, received limited acceptance. Recent availability of high-resolution displays, lighter structures and the various see-though designs that merge both real world

Kurtis Keller; Andrei State; Henry Fuchs

2008-01-01

37

Vibration isolation mounting system  

NASA Technical Reports Server (NTRS)

A system is disclosed for mounting a vibration producing device onto a spacecraft structure and also for isolating the vibration forces thereof from the structure. The system includes a mount on which the device is securely mounted and inner and outer rings. The rings and mount are concentrically positioned. The system includes a base (secured to the structure) and a set of links which are interconnected by a set of torsion bars which allow and resist relative rotational movement therebetween. The set of links are also rotatably connected to a set of brackets which are rigidly connected to the outer ring. Damped leaf springs interconnect the inner and outer rings and the mount allow relative translational movement therebetween in X and Y directions. The links, brackets and base are interconnected and configured so that they allow and resist translational movement of the device in the Z direction so that in combination with the springs they provide absorption of vibrational energy produced by the device in all three dimensions while providing rotational stiffness about all three axes to prevent undesired rotational motions.

Carter, Sam D. (Inventor); Bastin, Paul H. (Inventor)

1995-01-01

38

Pressure vessel bottle mount  

NASA Technical Reports Server (NTRS)

A mounting assembly for mounting a composite pressure vessel to a vehicle includes a saddle having a curved surface extending between two pillars for receiving the vessel. The saddle also has flanged portions which can be bolted to the vehicle. Each of the pillars has hole in which is mounted the shaft portion of an attachment member. A resilient member is disposed between each of the shaft portions and the holes and loaded by a tightening nut. External to the holes, each of the attachment members has a head portion to which a steel band is attached. The steel band circumscribes the vessel and translates the load on the springs into a clamping force on the vessel. As the vessel expands and contracts, the resilient members expand and contract so that the clamping force applied by the band to the vessel remains constant.

Wingett, Paul (Inventor)

2001-01-01

39

Mount Shasta, California  

NSDL National Science Digital Library

This resource about Mount Shasta, a compound stratovolcano in the Cascade Range, features links to all aspects of the volcano, including its geographic setting, and geologic and eruptive history. Students learn that Mount Shasta dominates the landscape of northern California and is the largest stratovolcano of the Cascade chain at approximately 350 cubic kilometers. Mount Shasta hosts five glaciers, including the Whitney Glacier, the largest in California. Shastina is a large subsidiary cone that rises to 3,758 meters on the west flank of the compound volcano. 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.

40

MOUNT BALDY WILDERNESS, ARIZONA.  

USGS Publications Warehouse

The Mount Baldy Wilderness, Arizona, was surveyed for mineral resources and was judged to have little or no promise for the occurrence of mineral resources. No mineral deposits, mining claims, or concentrations of trace metals were recognized within the area. No oil test holes have been drilled within the area; holes drilled about 35 mi north of the area were not productive. Further study of the Mount Baldy Wilderness would seem warranted only in the event that economic deposits of minerals or petroleum are found in nearby areas.

Finnell, Tommy L.; Soule, John H.

1984-01-01

41

Mount Thielsen, Oregon  

NSDL National Science Digital Library

This resource about Mount Thielsen, a normally polarized shield volcano in the Cascade Range, features links to all aspects of the volcano, including its geographic setting, and geologic and eruptive history. Students learn that Mount Thielsen is similar to many of the basaltic andesite shields that form the bulk of the High Cascades in Oregon. 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.

42

Solar panel  

Microsoft Academic Search

The invention provides a method for heating water by solar radiation using a reflux condenser system in which a heat transfer liquid is boiled by solar radiation and the vapor used to heat the water in a heat exchanger. The solar panel itself is highly efficient in operation and comprises a solar plate which incorporates a number of tubes containing

1978-01-01

43

Mount Wilson Observatory  

NSDL National Science Digital Library

Mount Wilson Observatory Home page includes a virtual tour and educational programs such as "Telescopes In Education" (TIE) Project, which permits remote access of a 24-inch telescope to schools (K-18) and amateur groups. Also contains professional services and historical information.

44

Head mounted display  

Microsoft Academic Search

This chapter describes head mounted displays (HMDs) from the viewpoint of the human factors. Because it has two separate display systems, HMDs are especially effective in displaying stereoscopic images. To develop better stereoscopic three-dimensional display technologies, it is important to investigate visual functions such as accommodation and convergence. From the results of the experiments, it is now possible to establish

Takashi Shibata

2002-01-01

45

Housing And Mounting Structure  

DOEpatents

This invention relates to an optical transmitter, receiver or transceiver module, and more particularly, to an apparatus for connecting a first optical connector to a second optical connector. The apparatus comprises: (1) a housing having at least a first end and at least a second end, the first end of the housing capable of receiving the first optical connector, and the second end of the housing capable of receiving the second optical connector; (2) a longitudinal cavity extending from the first end of the housing to the second end of the housing; and (3) an electromagnetic shield comprising at least a portion of the housing. This invention also relates to an apparatus for housing a flexible printed circuit board, and this apparatus comprises: (1) a mounting structure having at least a first surface and a second surface; (2) alignment ridges along the first and second surfaces of the mounting structure, the alignment ridges functioning to align and secure a flexible printed circuit board that is wrapped around and attached to the first and second surfaces of the mounting structure; and (3) a series of heat sink ridges adapted to the mounting structure, the heat sink ridges functioning to dissipate heat that is generated from the flexible printed circuit board.

Anderson, Gene R. (Albuquerque, NM); Armendariz, Marcelino G. (Albuquerque, NM); Baca, Johnny R.F. (Albuquerque, NM); Bryan, Robert P. (Albuquerque, NM); Carson, Richard F. (Albuquerque, NM); Duckett, III, Edwin B. (Albuquerque, NM); McCormick, Frederick B. (Albuquerque, NM); Miller, Gregory V. (Kansas City, MO); Peterson, David W. (Sandia Park, NM); Smith, Terrance T. (Albuquerque, NM)

2005-03-08

46

61. Upper panel in cornerpower panel lcpa lower panel in ...  

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

61. Upper panel in corner-power panel lcpa lower panel in corner-oxygen regeneration unit, at right-air conditioner control panel, on floor-bio-pack 45 for emergency breathing, looking northwest - Ellsworth Air Force Base, Delta Flight, Launch Control Facility, County Road CS23A, North of Exit 127, Interior, Jackson County, SD

47

52. VIEW OF REMAINS OF ORIGINAL 1907 CONTROL PANEL, LOCATED ...  

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

52. VIEW OF REMAINS OF ORIGINAL 1907 CONTROL PANEL, LOCATED ON NORTH WALL OF EAST END OF CONTROL ROOM. PORTIONS OF THIS PANEL REMAINED IN USE UNTIL THE PLANT CLOSED. THE METERS AND CONTROLS ARE MOUNTED ON SOAPSTONE PANELS. THE INSTRUMENT IN THE LEFT CENTER OF THE PHOTOGRAPH IS A TIRRILL VOLTAGE REGULATOR. - New York, New Haven & Hartford Railroad, Cos Cob Power Plant, Sound Shore Drive, Greenwich, Fairfield County, CT

48

Mount St. Helens Rebirth  

NASA Technical Reports Server (NTRS)

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.

2002-01-01

49

Plasma Screen Floating Mount  

DOEpatents

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.

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

2004-10-26

50

Mount Wilson Observatory  

NASA Astrophysics Data System (ADS)

Mount Wilson Observatory, located in the San Gabriel Mountains near Pasadena, California, was founded in 1904 by George Ellery Hale with financial support from Andrew Carnegie. In the 1920s and 1930s, working at the 2.5 m Hooker telescope, Edwin Hubble made two of the most important discoveries in the history of astronomy: first, that `nebulae' are actually island universes—galaxies—each with bil...

Murdin, P.

2000-11-01

51

Plasma Panel Based Radiation Detectors  

SciTech Connect

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.

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

52

Mount Sinai Hospital: Blueprint  

NSDL National Science Digital Library

Led by Dr. Christopher Hogue of the Samuel Lunenfeld Research Institute at Mount Sinai Hospital the Blueprint Initiative "develops, hosts and maintains public biological databases and Bioinformatics software tools such as BIND, SeqHound and Distributed Folding." The Blueprint research program also has a sister node located at the National University of Singapore. In addition to providing access to a variety of databases and software, the Blueprint website offers links to a number of downloadable research publications. Site visitors will also find job postings (when available) in the areas of software development, and curation. Additional Blueprint services include user help, educational and outreach support, and product documentation.

53

Clamp-mount device  

NASA Technical Reports Server (NTRS)

A clamp-mount device is disclosed for mounting equipment to an associated I-beam and the like structural member of the type having oppositely extending flanges wherein the device comprises a base and a pair of oppositely facing clamping members carried diagonally on the base clamping flanges therebetween and having flange receiving openings facing one another. Lock means are carried diagonally by the base opposite the clamping members locking the flanges in the clamping members. A resilient hub is carried centrally of the base engaging and biasing a back side of the flanges maintaining tightly clamped and facilitating use on vertical as well as horizontal members. The base turns about the hub to receive the flanges within the clamping members. Equipment may be secured to the base by any suitable means such as bolts in openings. Slidable gate latches secure the hinged locks in an upright locking position. The resilient hub includes a recess opening formed in the base and a rubber-like pad carried in this opening being depressably and rotatably carried therein.

Clark, K. H. (inventor)

1983-01-01

54

Surface mount component jig  

DOEpatents

A device for bending and trimming the pins of a dual-inline-package component and the like for surface mounting rather than through mounting to a circuit board comprises, in a first part, in pin cutter astride a holder having a recess for holding the component, a first spring therebetween, and, in a second part, two flat members pivotally interconnected by a hinge and urged to an upward peaked position from a downward peaked position by a second spring. As a downward force is applied to the pin cutter it urges the holder downward, assisted by the first spring and a pair of ridges riding on shoulders of the holder, to carry the component against the upward peaked flat members which guide the pins outwardly. As the holder continues downwardly, the flat members pivot to the downward peaked position bending the pins upwardly against the sides of the holder. When the downward movement is met with sufficient resistance, the ridges of the pin cutter ride over the holder's shoulders to continue downward to cut any excess length of pin.

Kronberg, James W. (Beech Island, SC)

1990-08-07

55

Heat exchanger panel  

NASA Technical Reports Server (NTRS)

The present invention relates to a heat exchanger panel which has broad utility in high temperature environments. The heat exchanger panel has a first panel, a second panel, and at least one fluid containment device positioned intermediate the first and second panels. At least one of the first panel and the second panel have at least one feature on an interior surface to accommodate the at least one fluid containment device. In a preferred embodiment, each of the first and second panels is formed from a high conductivity, high temperature composite material. Also, in a preferred embodiment, the first and second panels are joined together by one or more composite fasteners.

Warburton, Robert E. (Inventor); Cuva, William J. (Inventor)

2005-01-01

56

Mount Vesuvius, Italy  

NASA Technical Reports Server (NTRS)

This Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image of Mt. Vesuvius, Italy was acquired September 26, 2000. The full-size false-color image covers an area of 36 by 45 km. Vesuvius overlooks the city of Naples and the Bay of Naples in central Italy. (Popocatepetl and Mount Fuji are other volcanos surrounded by dense urban areas.) In 79 AD, Vesuvius erupted cataclysmically, burying all of the surrounding cites with up to 30 m of ash. The towns of Pompeii and Herculanaeum were rediscovered in the 18th century, and excavated in the 20th century. They provide a snapshot of Roman life from 2000 years ago: perfectly preserved are wooden objects, food items, and the casts of hundreds of victims. Vesuvius is intensively monitored for potential signs of unrest that could signal the beginning of another eruption. Image courtesy NASA/GSFC/MITI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team

2002-01-01

57

Mount Bailey, Oregon  

NSDL National Science Digital Library

This site features links to all aspects of Mt. Bailey, a volcano in the Cascade Range, including its geographic setting, and geologic and eruptive history. Mount Bailey is the southernmost volcano in a north-south-trending volcanic chain 10 kilometers long that rises west of Diamond Lake. This mountain was originally know as Old Baldy, and was probably mistakenly recorded as Old Bailey. It was known as Youxlokes to the Klamath, which meant Medicine Mountain and, according to legend, medicine men and priests often feasted on the summit and communed with the upper world. Links labeled 'Special Items of Interest' lead to 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.

58

Mount Auburn Cemetery  

NSDL National Science Digital Library

The bucolic grounds of Mount Auburn Cemetery are fascinating, and have provided solace to thousands of departed souls since 1831. The grounds are also quite historic and the cemetery's website provides ample information for historians, sociologists, and others who might be interested in studying this unique place. New visitors should read the reminisces offered by persons of note in the "What Makes This Place Special?" There are paens offered up by William Ellery Channing, Emily Elizabeth Parsons, and Dorothea Dix. Moving along, the Visit section offers information on guided walks, birding tours around the grounds, and special events. Of course, there is also information on the more traditional activities and ceremonies associated with any cemetery available under the Cemetery link.

2012-01-01

59

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.

60

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.

61

Tracking a head-mounted display in a room-sized environment with head-mounted cameras  

NASA Astrophysics Data System (ADS)

This paper presents our efforts to accurately track a Head-Mounted Display (HMD) in a large environment. We review our current benchtop prototype (introduced in {WCF9O]), then describe our plans for building the full-scale system. Both systems use an inside-oui optical tracking scheme, where lateraleffect photodiodes mounted on the user's helmet view flashing infrared beacons placed in the environment. Church's method uses the measured 2D image positions and the known 3D beacon locations to recover the 3D position and orientation of the helmet in real-time. We discuss the implementation and performance of the benchtop prototype. The full-scale system design includes ceiling panels that hold the infrared beacons and a new sensor arrangement of two photodiodes with holographic lenses. In the full-scale system, the user can walk almost anywhere under the grid of ceiling panels, making the working volume nearly as large as the room.

Wang, Jih-Fang; Azuma, Ronald T.; Bishop, Gary; Chi, Vernon; Eyles, John; Fuchs, Henry

1990-10-01

62

Mount St. Helens Flyover  

NASA Technical Reports Server (NTRS)

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.

2002-01-01

63

Detector Mount Design for IGRINS  

NASA Astrophysics Data System (ADS)

The Immersion Grating Infrared Spectrometer (IGRINS) is a near-infrared wide-band high-resolution spectrograph jointly developed by the Korea Astronomy and Space Science Institute and the University of Texas at Austin. IGRINS employs three HAWAII-2RG Focal Plane Array (H2RG FPA) detectors. We present the design and fabrication of the detector mount for the H2RG detector. The detector mount consists of a detector housing, an ASIC housing, a Field Flattener Lens (FFL) mount, and a support base frame. The detector and the ASIC housing should be kept at 65 K and the support base frame at 130 K. Therefore they are thermally isolated by the support made of GFRP material. The detector mount is designed so that it has features of fine adjusting the position of the detector surface in the optical axis and of fine adjusting yaw and pitch angles in order to utilize as an optical system alignment compensator. We optimized the structural stability and thermal characteristics of the mount design using computer-aided 3D modeling and finite element analysis. Based on the structural and thermal analysis, the designed detector mount meets an optical stability tolerance and system thermal requirements. Actual detector mount fabricated based on the design has been installed into the IGRINS cryostat and successfully passed a vacuum test and a cold test.

Oh, Jae Sok; Park, Chan; Cha, Sang-Mok; Yuk, In-Soo; Park, Kwijong; Kim, Kang-Min; Chun, Moo-Young; Ko, Kyeongyeon; Oh, Heeyoung; Jeong, Ueejeong; Nah, Jakyoung; Lee, Hanshin; Jaffe, Daniel T.

2014-06-01

64

SXI prototype mirror mount  

NASA Technical Reports Server (NTRS)

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.

1995-01-01

65

SXI prototype mirror mount  

NASA Astrophysics Data System (ADS)

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.

1995-04-01

66

Kinematic high bandwidth mirror mount  

DOEpatents

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.

Kuklo, Thomas C. (Oakdale, CA)

1995-01-01

67

Kinematic high bandwidth mirror mount  

DOEpatents

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. 7 figures.

Kuklo, T.C.

1995-03-21

68

Dry tilt network at Mount Rainier, Washington  

USGS Publications Warehouse

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.

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

1984-01-01

69

GIS Ethics Panel Preparation Panel Session  

E-print Network

GIS Ethics Panel Preparation Panel Session: 3236 Geographic Information Ethics and GIScience II(s): Geographic Information Science and Systems Specialty Group Ethics, Justice, and Human Rights Specialty Group State University Geney Terry - GISCI Session Description: Ethical engagements with the multitude of GIS

Wright, Dawn Jeannine

70

Optimum operating conditions of a solar cell panel and prediction of solar radiation in Sanaa, Yemen  

Microsoft Academic Search

Results of a study of the performance of solar cells under nominal operating conditions in Yemen are reported. The solar cell panel comprised 14 Si cells of .003 sq m surface area each, and was mounted on a rooftop with the solar radiation being measured by a pyranometer. Further monitoring was performed of the panel surface temperature, the ambient air

A. Khogali; M. R. I. Ramadan

1982-01-01

71

Full color LED display panel fabricated on a silicon microreflector  

Microsoft Academic Search

A high-density full color LED (light emitting diode) display panel was fabricated using LED array units which were mounted with many LED chips on silicon microreflectors. The reflector was formed on a (100) silicon wafer by anisotropic chemical etching. The silicon microreflector absorbs the heat generated by the LED chips and improves their light directive charcteristics. The three kinds of

K. Takahashi; S. Nakajima; S. Takeuchi

1997-01-01

72

Analysis of Wind Forces on RoofTop Solar Panel  

Microsoft Academic Search

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

Yogendra Panta; Ganesh Kudav

2011-01-01

73

Solar panel construction  

Microsoft Academic Search

A solar panel construction is described including an elongated, sealed, flat, polygonal case or receptacle within which is supported a metal solar energy collector panel on rigid permeable insulation material and also relatively soft yieldable permeable insulation material. A radiant energy transmitting means is spaced above the collector panel, the construction being hermetically sealed and dehumidified and particularly arranged to

Grossman

1977-01-01

74

AEROSPACE SAFETY ADVISORY PANEL  

E-print Network

AEROSPACE SAFETY ADVISORY PANEL ANNUAL REPORT FOR 20! 3 #12;. #12;NASA AEROSPACE SAFETY ADVISORY and Space Administration Authorization Act of 2005 (P.L. 109-155), the Aerospace Safety Advisory Panel (ASAP. Dyer, USN (Ret.) Chair, Aerospace Safety Advisory Panel Enclosure #12;NASA AEROSPACE SAFETY ADVISORY

Waliser, Duane E.

75

TRMM Solar Array Panels  

NASA Technical Reports Server (NTRS)

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.

1998-01-01

76

A new head mounted display system with adjustable disparity for high depth-performance  

Microsoft Academic Search

A new head mounted display (HMD) system with high depth-performance is proposed for virtual reality. To realize high depth-performance for every observer, we experimentally measure the individual difference on disparity which generates stereoscopic views. Using the experimental results, we design a disparity adjustment panel to tune the individual difference of disparity. It is experimentally proven that the proposed HMD system

Jing-Long Wu; Masaomi NAKAHATA; Sadao KAWAMURA

1995-01-01

77

Safety Panel Resources  

NASA Technical Reports Server (NTRS)

The goal of this paper is to explore what resources are potentially available to safety panels and to provide some guidance on how to utilize those resources. While the examples used in this paper will concentrate on the Flight Equipment and Reliability Review Panel (FESRRP) and Extravehicular Activity (EVA) hardware that have come through that panel, as well as resources at Johnson Space Center, the paper will address how this applies to safety panels in general, and where possible cite examples for other safety panels.

Stewart, Christine E.

2008-01-01

78

Organized Continuity Panel Reassignment  

PubMed Central

Background Structured continuity clinical experience is required in all primary care residency programs. There is a paucity of data on whether continuity patient panels are routinely used, what the ideal panel composition is, how panels are managed within residency programs across the country, and the outcomes related to this training requirement. Methods We designed an organized continuity panel reassignment process with the goal of producing balanced resident panels, that is, panels with similar numbers of patients by race/ethnicity, sex, and age group, as well as comparable numbers of patients with diabetes and those with high health care use. This project focused on postgraduate year-1 (PGY-1) panels to use balanced panels for redesign and focus of their initial training experiences on practice-based learning and patient care continuity. Results Findings suggest improved parity in patient care experiences through more evenly distributed panels. Furthermore, the focus on panel review and case management enhanced the curriculum for PGY-1 residents, whose clinical experiences and diabetes clinical quality indicators compared more favorably to residents in earlier classes. Conclusions Balanced continuity panels provide an enhanced substrate for building clinical curricula. Preliminary data suggest that this process helped contribute to improved quality indicators for patients with diabetes. PMID:22942973

Bennett, Kevin; Baxley, Elizabeth; Carter, Charles; Stanek, Michele

2011-01-01

79

Interactive optical panel  

DOEpatents

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.

Veligdan, James T. (Manorville, NY)

1995-10-03

80

Quiet Honeycomb Panels  

NASA Technical Reports Server (NTRS)

Sandwich honeycomb composite panels are lightweight and strong, and, therefore, provide a reasonable alternative to the aluminum ring frame/stringer architecture currently used for most aircraft airframes. The drawback to honeycomb panels is that they radiate noise into the aircraft cabin veil- efficiently provoking the need for additional sound treatment which adds weight and reduces the material's cost advantage. A series of honeycomb panels was made -hick incorporated different design strategies aimed at reducing the honeycomb panels' radiation efficiency while at the same time maintaining their strength. The majority of the designs were centered around the concept of creating 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.

Palumbo, Daniel L.; Klos, Jacob

2010-01-01

81

Interactive optical panel  

DOEpatents

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.

Veligdan, J.T.

1995-10-03

82

Cryogenically cooled detector pin mount  

SciTech Connect

A focal plane assembly facilitates a molybdenum base plate being mounted to another plate made from aluminum. The molybdenum pin is an interference fit (press fit) in the aluminum base plate. An annular cut out area in the base plate forms two annular flexures.

Hunt, Jr., William E; Chrisp, Michael P

2014-06-03

83

Mount St. Helens Postage Stamp  

USGS Multimedia Gallery

Mount St. Helens and surrounding area recover from the historic May 1980 eruption. Shades of white and gray indicate still-bare slopes that were swept by volcanic flows; light green areas at the top of the photo show regrowth of vegetation in devastated areas; dark green areas at the bottom were ...

84

Mount Rainier active cascade volcano  

NASA Technical Reports Server (NTRS)

Mount Rainier is one of about two dozen active or recently active volcanoes in the Cascade Range, an arc of volcanoes in the northwestern United States and Canada. The volcano is located about 35 kilometers southeast of the Seattle-Tacoma metropolitan area, which has a population of more than 2.5 million. This metropolitan area is the high technology industrial center of the Pacific Northwest and one of the commercial aircraft manufacturing centers of the United States. The rivers draining the volcano empty into Puget Sound, which has two major shipping ports, and into the Columbia River, a major shipping lane and home to approximately a million people in southwestern Washington and northwestern Oregon. Mount Rainier is an active volcano. It last erupted approximately 150 years ago, and numerous large floods and debris flows have been generated on its slopes during this century. More than 100,000 people live on the extensive mudflow deposits that have filled the rivers and valleys draining the volcano during the past 10,000 years. A major volcanic eruption or debris flow could kill thousands of residents and cripple the economy of the Pacific Northwest. Despite the potential for such danger, Mount Rainier has received little study. Most of the geologic work on Mount Rainier was done more than two decades ago. Fundamental topics such as the development, history, and stability of the volcano are poorly understood.

1994-01-01

85

36 Views of Mount Rainier  

ERIC Educational Resources Information Center

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."…

Fortune, Tracy

2011-01-01

86

Electron Diffraction Tube with mounting  

E-print Network

the electron beam, providing, with the anode, an electron optic lens system. The accelerated particles land of a fluorescent screen and #12;2 only one simple to operate, test instrument is required. compact "" The electron system (H, K, G! to G4) connect with the correspondlngly marked sockets on the mounting. The tube

Bayindir, Mehmet

87

Cinder Cone in Mount Aso  

USGS Multimedia Gallery

A cinder cone within the Mount Aso caldera, located on Kyushu Island, Japan. The caldera contains several cinder cones and stratovolcanoes. Cinder cones (otherwise known as scoria cones) are the most common type of volcano on Earth. They’re also one of the smallest. They can often be found gr...

88

Isolation mounts scatterometry with RCWA and PML  

NASA Astrophysics Data System (ADS)

In this paper, we examine the sensitivity of scatterometry for the isolation mounts on the substrate by applying PML in RCWA. We analyze the reflectance from the silicon and resist single mount and the silicon double mounts on the silicon substrate. First, we investigate the mode convergences and the beam width dependences of reflectance. Second, we show the propagation properties of the electromagnetic fields propagating for the isolation mounts on the silicon substrate. Finally, we examine the wavelength properties of reflectance calculated by changing the beam width, the mount width and the mount height for single mount and the silicon mount positions for the double silicon mounts. Then, we understand that the scatterometry observation is possible in several decade microns beam width.

Shirasaki, Hirokimi

2014-04-01

89

78 FR 59954 - Notice of Inventory Completion: Michigan State Police, Mount Pleasant Post, Mount Pleasant, MI  

Federal Register 2010, 2011, 2012, 2013

...R50000] Notice of Inventory Completion: Michigan State Police, Mount Pleasant Post...SUMMARY: The Michigan State Police, Mount Pleasant Post...should submit a written request to the Michigan State Police, Mount Pleasant...

2013-09-30

90

Aerospace safety advisory panel  

NASA Technical Reports Server (NTRS)

This report from the Aerospace Safety Advisory Panel (ASAP) contains findings, recommendations, and supporting material concerning safety issues with the space station program, the space shuttle program, aeronautics research, and other NASA programs. Section two presents findings and recommendations, section three presents supporting information, and appendices contain data about the panel membership, the NASA response to the March 1993 ASAP report, and a chronology of the panel's activities during the past year.

1994-01-01

91

Advanced solar panel designs  

Microsoft Academic Search

Solar panel designs that utilize new high-efficiency solar cells and lightweight rigid panel technologies are described. The resulting designs increase the specific power (W\\/kg) achievable in the near-term and are well suited to meet the demands of higher performance small satellites (smallsats). Advanced solar panel designs have developed and demonstrated on two NASA contracts at TECSTAR. The first used 19%

E. L. Ralph; E. B. Linder

1996-01-01

92

Titanium Honeycomb Panel Testing  

NASA Technical Reports Server (NTRS)

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.

Richards, W. Lance; Thompson, Randolph C.

1996-01-01

93

Solar reflection panels  

DOEpatents

A solar collector comprising a glass mirror, and a composite panel, wherein the back of the mirror is affixed to a front surface of the composite panel. The composite panel comprises a front sheet affixed to a surface of a core material, preferably a core material comprising a honeycomb structure, and a back sheet affixed to an opposite surface of the core material. The invention may further comprise a sealing strip, preferably comprising EPDM, positioned between the glass mirror and the front surface of the composite panel. The invention also is of methods of making such solar collectors.

Diver, Jr., Richard B. (Albuquerque, NM); Grossman, James W. (Albuquerque, NM); Reshetnik, Michael (Boulder, CO)

2006-07-18

94

Mount McLoughlin, Oregon  

NSDL National Science Digital Library

This resource about Mount McLoughlin, a steep-sided, dominantly basaltic andesite lava cone above a lower Pliocene and Pleistocene basaltic andesite shield in the Cascades, features links to all aspects of the volcano, including its geographic setting, and geologic and eruptive history. The site explains that it was formerly known as Mt. Pitt or Mt. Pit, but was renamed to honor John McLoughlin, one of the most influential figures of the fur trade and settlement periods of Pacific Northwest history. Mount McLoughlin is commonly called an andesitic volcano as inferred from its steep-sided form. Links labeled 'Special Items of Interest' include information about volcanic highlights and features, points of interest. Other links lead to maps, graphics, images, publications, reports, and other items of interest involving this volcano and others.

95

Mount Unzen kills three volcanologists  

NASA Astrophysics Data System (ADS)

Three AGU members were among 37 people killed June 3 when Mount Unzen, a volcano in Nagasaki prefecture, Japan, erupted. Unzen last erupted in 1792. The first signs of renewed activity appeared in mid-1990, with increases in seismicity and the first volcanic tremor since observations began in 1966. The three volcanologists, Harry Glicken and Maurice and Katia Krafft, had traveled to Mount Unzen to monitor the increased seismic activity. Glicken, 33, was a visiting scientist at Tokyo Metropolitan University and an assistant researcher in geological sciences at the University of California, Santa Barbara. He worked for the U.S. Geological Survey until 1989, and narrowly escaped death in the 1980 eruption of Mount St. Helens in Washington.Glicken had been an AGU member since 1980 and was known for his work in debris avalanches. Maurice, 45, and Katia Krafft, 44, of Cernay, France, were professional volcanologists known for their extensive work in publishing books and films on volcanology for the general public. Both Kraffts joined AGU in 1975.

DeVito, M. Catherine

96

Flexible optical panel  

DOEpatents

A flexible optical panel includes laminated optical waveguides, each including a ribbon core laminated between cladding, with the core being resilient in the plane of the core for elastically accommodating differential movement thereof to permit winding of the panel in a coil.

Veligdan, James T. (Manorville, NY)

2001-01-01

97

Microgravity Science Research Panel  

NASA Technical Reports Server (NTRS)

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.

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

2000-01-01

98

Analysis of Panel Data  

Microsoft Academic Search

Panel data models have become increasingly popular among applied researchers due to their heightened capacity for capturing the complexity of human behavior as compared to cross-sectional or time series data models. As a consequence, richer panel data sets also have become increasingly available. This 2003 second edition is a substantial revision of the highly successful first edition of 1986. Advances

Cheng Hsiao

1986-01-01

99

Advanced solar panel designs  

Microsoft Academic Search

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

E. L. Ralph; E. Linder

1995-01-01

100

Aerospace Safety Advisory Panel  

NASA Technical Reports Server (NTRS)

The Aerospace Safety Advisory Panel (ASAP) provided oversight on the safety aspects of many NASA programs. In addition, ASAP undertook three special studies. At the request of the Administrator, the panel assessed the requirements for an assured crew return vehicle (ACRV) for the space station and reviewed the organization of the safety and mission quality function within NASA. At the behest of Congress, the panel formed an independent, ad hoc working group to examine the safety and reliability of the space shuttle main engine. Section 2 presents findings and recommendations. Section 3 consists of information in support of these findings and recommendations. Appendices A, B, C, and D, respectively, cover the panel membership, the NASA response to the findings and recommendations in the March 1992 report, a chronology of the panel's activities during the reporting period, and the entire ACRV study report.

1993-01-01

101

Holding fixture for metallographic mount polishing  

DOEpatents

A fixture is described for holding mounted specimens for polishing, having an arm; a body attached to one end of the arm, the body having at least one flange having an opening to accommodate a mounted specimen; and a means applying pressure against the outer surface of the mounted specimen to hold the specimen in contact with the polishing surface. 3 figs.

Barth, C.H.; Cramer, C.E.

1997-12-30

102

Holding fixture for metallographic mount polishing  

SciTech Connect

A fixture for holding mounted specimens for polishing, having an arm; a body attached to one end of the arm, the body having at least one flange having an opening to accommodate a mounted specimen; and a means applying pressure against the outer surface of the mounted specimen to hold the specimen in contact with the polishing surface.

Barth, C.H.; Cramer, C.E.

1996-12-31

103

Holding fixture for metallographic mount polishing  

SciTech Connect

A fixture for holding mounted specimens for polishing, having an arm; a body attached to one end of the arm, the body having at least one flange having an opening to accommodate a mounted specimen; and a means applying pressure against the outer surface of the mounted specimen to hold the specimen in contact with the polishing surface.

Barth, Clyde H. (Ballston Lake, NY); Cramer, Charles E. (Schenectady, NY)

1997-01-01

104

MOUNT MORIAH ROADLESS AREA, NEVADA.  

USGS Publications Warehouse

A mineral survey identified the northeastern part of the Mount Moriah Roadless Area in extreme east-central Nevada as an area of probable potential for the occurrence of small, isolated deposits containing lead and zinc. Many active quarries in a unique high-quality decorative building stone occur in the area and have substantiated mineral-resource potential. Further studies in the roadless area might include detailed mapping of exposed Prospect Mountain Quartzite building stone units and notation of their suitability for quarrying. More detailed geochemical studies in the area of probable base-metal resource potential might include additional stream-sediment sampling and sampling along fault zones.

Carlson, Robert R.; Wood, Robert H., II

1984-01-01

105

Nozzle and shroud assembly mounting structure  

DOEpatents

The present nozzle and shroud assembly mounting structure configuration increases component life and reduces maintenance by reducing internal stress between the mounting structure having a preestablished rate of thermal expansion and the nozzle and shroud assembly having a preestablished rate of thermal expansion being less than that of the mounting structure. The mounting structure includes an outer sealing portion forming a cradling member in which an annular ring member is slidably positioned. The mounting structure further includes an inner mounting portion to which a hooked end of the nozzle and shroud assembly is attached. As the inner mounting portion expands and contracts, the nozzle and shroud assembly slidably moves within the outer sealing portion. 3 figs.

Faulder, L.J.; Frey, G.A.; Nielsen, E.W.; Ridler, K.J.

1997-08-05

106

Nozzle and shroud assembly mounting structure  

DOEpatents

The present nozzle and shroud assembly mounting structure configuration increases component life and reduces maintenance by reducing internal stress between the mounting structure having a preestablished rate of thermal expansion and the nozzle and shroud assembly having a preestablished rate of thermal expansion being less than that of the mounting structure. The mounting structure includes an outer sealing portion forming a cradling member in which an annular ring member is slidably positioned. The mounting structure further includes an inner mounting portion to which a hooked end of the nozzle and shroud assembly is attached. As the inner mounting portion expands and contracts, the nozzle and shroud assembly slidably moves within the outer sealing portion.

Faulder, Leslie J. (San Diego, CA); Frey, deceased, Gary A. (late of Seattle, WA); Nielsen, Engward W. (El Cajon, CA); Ridler, Kenneth J. (San Diego, CA)

1997-01-01

107

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

NASA Technical Reports Server (NTRS)

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.

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

1983-01-01

108

Commerical Research Panel  

NASA Technical Reports Server (NTRS)

This document is a transcription of the Commercial Research Panel's discussion at 'The Spacelab Accomplishments Forum'. Dr. Stodieck, Dr. David Klaus, Dr. Weija Zhou, and Dr. Albert Sacco talk about the commercial research that has taken place on Spacelab.

Kearns, Joel K.; Stodieck, Louis; Klaus, David; Zhou, Wei-Ja; Sacco, Albert

2000-01-01

109

BMP (Basic Metabolic Panel)  

MedlinePLUS

... Pages On This Site Apart from the Related Tests noted above, there are no other related pages on this site. Elsewhere On The Web MedlinePlus Medical Encyclopedia: Basic metabolic panel » See all ...

110

Autoimmune liver disease panel  

MedlinePLUS

Liver disease test panel - autoimmune ... Autoimmune disorders are a possible cause of liver disease. The most common of these diseases are autoimmune hepatitis and primary biliary cirrhosis. This group of tests helps your health care provider ...

111

Electromagnetically clean modular solar panels using components engineered for producibility  

Microsoft Academic Search

A spacecraft solar panel approach is described that uses space qualified materials, including conventional high efficiency crystalline cells, and engineers the component designs for producibility by incorporating a multi-cell transparent cover\\/shield in a modular configuration. A lamination approach allows the solar cells to be mounted onto a Kapton flex-circuit layer, which, together with a transparent conductive coating, can provide electromagnetic

Theodore G. Stern

2008-01-01

112

Gas filled panel insulation  

DOEpatents

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.

Griffith, Brent T. (Berkeley, CA); Arasteh, Dariush K. (Oakland, CA); Selkowitz, Stephen E. (Piedmont, CA)

1993-01-01

113

Medical Expenditure Panel Survey  

Cancer.gov

The Medical Expenditure Panel Survey (MEPS) is a nationally representative survey of the civilian noninstitutionalized population in the United States supported by the Agency for Healthcare Research and Quality (AHRQ). Data are collected over five rounds of in-person interviews that cover a consecutive two-year period. Each MEPS panel is a subsample of the prior year National Health Interview Survey (NHIS) respondents.

114

Propulsion Systems Panel deliberations  

NASA Technical Reports Server (NTRS)

The Propulsion Systems Panel was established because of the specialized nature of many of the materials and structures technology issues related to propulsion systems. This panel was co-chaired by Carmelo Bianca, MSFC, and Bob Miner, LeRC. Because of the diverse range of missions anticipated for the Space Transportation program, three distinct propulsion system types were identified in the workshop planning process: liquid propulsion systems, solid propulsion systems and nuclear electric/nuclear thermal propulsion systems.

Bianca, Carmelo J.; Miner, Robert; Johnston, Lawrence M.; Bruce, R.; Dennies, Daniel P.; Dickenson, W.; Dreshfield, Robert; Karakulko, Walt; Mcgaw, Mike; Munafo, Paul M.

1993-01-01

115

Mounting and alignment of IXO mirror segments  

NASA Astrophysics Data System (ADS)

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.

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

2010-07-01

116

Optical Mounts for Cryogenic Beam Splitters  

NASA Technical Reports Server (NTRS)

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.

Rudman, A. A.

1985-01-01

117

Optimization of aircraft interior panels  

NASA Technical Reports Server (NTRS)

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.

Kourtides, Demetrius A.; Roper, Willard D.

1986-01-01

118

Aerospace safety advisory panel  

NASA Astrophysics Data System (ADS)

The Aerospace Safety Advisory Panel (ASAP) monitored NASA's activities and provided feedback to the NASA Administrator, other NASA officials and Congress throughout the year. Particular attention was paid to the Space Shuttle, its launch processing and planned and potential safety improvements. The Panel monitored Space Shuttle processing at the Kennedy Space Center (KSC) and will continue to follow it as personnel reductions are implemented. There is particular concern that upgrades in hardware, software, and operations with the potential for significant risk reduction not be overlooked due to the extraordinary budget pressures facing the agency. The authorization of all of the Space Shuttle Main Engine (SSME) Block II components portends future Space Shuttle operations at lower risk levels and with greater margins for handling unplanned ascent events. Throughout the year, the Panel attempted to monitor the safety activities related to the Russian involvement in both space and aeronautics programs. This proved difficult as the working relationships between NASA and the Russians were still being defined as the year unfolded. NASA's concern for the unique safety problems inherent in a multi-national endeavor appears appropriate. Actions are underway or contemplated which should be capable of identifying and rectifying problem areas. The balance of this report presents 'Findings and Recommendations' (Section 2), 'Information in Support of Findings and Recommendations' (Section 3) and Appendices describing Panel membership, the NASA response to the March 1994 ASAP report, and a chronology of the panel's activities during the reporting period (Section 4).

1995-03-01

119

Mount Meager landslide flow history  

NASA Astrophysics Data System (ADS)

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.

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

2014-05-01

120

Mount Meager landslide flow history  

NASA Astrophysics Data System (ADS)

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.

Moretti, L.; Allstadt, K.; Mangeney, A.; Capdeville, Y.; Stutzmann, E.; Bouchut, F.

2013-12-01

121

Oven wall panel construction  

DOEpatents

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.

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

1980-04-22

122

Advanced solar panel designs  

NASA Astrophysics Data System (ADS)

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 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 a 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.

Ralph, E. L.; Linder, E.

1995-10-01

123

Advanced solar panel designs  

NASA Technical Reports Server (NTRS)

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 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 a 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.

Ralph, E. L.; Linder, E.

1995-01-01

124

PRSEUS Acoustic Panel Fabrication  

NASA Technical Reports Server (NTRS)

This report describes the development of a novel structural concept, Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS), that addresses the demanding fuselage loading requirements for the Hybrid Wing or Blended Wing Body (BWB) airplane configuration with regards to acoustic response. A PRSEUS panel was designed and fabricated and provided to NASA-LaRC for acoustic response testing in the Structural Acoustics Loads and Transmission (SALT) facility). Preliminary assessments of the sound transmission characteristics of a PRSEUS panel subjected to a representative Hybrid Wing Body (HWB) operating environment were completed for the NASA Environmentally Responsible Aviation (ERA) Program.

Nicolette, Velicki; Yovanof, Nicolette P.; Baraja, Jaime; Mathur, Gopal; Thrash, Patrick; Pickell, Robert

2011-01-01

125

Entry Systems Panel deliberations  

NASA Technical Reports Server (NTRS)

The Entry Systems Panel was chaired by Don Rummler, LaRC and Dan Rasky, ARC. As requested, each panel participant prior to the workshop prepared and delivered presentations to: (1) identify technology needs; (2) assess current programs; (3) identify technology gaps; and (4) identify highest payoff areas R&D. Participants presented background on the entry systems R&D efforts and operations experiences for the Space Shuttle Orbiter. These participants represented NASA Centers involved in research (Ames Research Center), development (Johnson Space Center) and operations (Kennedy Space Center) and the Shuttle Orbiter prime contractor. The presentations lead to the discovery of several lessons learned.

Rasky, Daniel J.; Rummler, Donald R.; Bersch, Charlie; Dixon, Sidney C.

1993-01-01

126

CFRP panel concept design study for the CCAT  

NASA Astrophysics Data System (ADS)

Under contract from the Cornell-Caltech Atacama Telescope Project (CCAT), Composite Mirror Applications, Inc. (CMA) has undertaken a feasibility design study for the use of Carbon Fiber Reinforced Plastic (CFRP) panels in forming the primary mirror surface. We review some of the past projects using CFRP panel technology for millimeter and submillimeter wavelength radio astronomy telescopes. Pros and cons of the technology are discussed. A particular panel configuration was proposed and computer modeled with finite element analysis (FEA). The technology of replicated CFRP panels for short wavelength radio astronomical telescopes is mature and cost effective. For shorter wavelengths into the IR and visible, it is becoming a very attractive alternative to traditional, heavy glass or metal technologies.

Martin, Robert N.; Romeo, Robert C.; Kingsley, Jeffrey S.

2006-06-01

127

NASA active in Mount St. Helens assessment  

Microsoft Academic Search

Ever since the May 18 eruption of Mount St. Helens, the National Aeronautics and Space Administration has been working closely with scientists from universities and government agencies to assess the impact of the explosive geologic event. Instrument-laden NASA aircraft, balloons, and spacecraft all have contributed important data. Mount St. Helens is undoubtedly the best documented volcanic eruption in history.Shortly after

Peter M. Bell

1980-01-01

128

Helmet-Mounted Liquid-Crystal Display  

NASA Technical Reports Server (NTRS)

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.

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

1991-01-01

129

East Jerusalem: Mount of Olives Jewish Cemetary  

Microsoft Academic Search

The Jewish Cemetary on the Mount of Olives has been active for over 2000 years. The site is desirable for those of Jewish faith as a Bible verse (Zech. 14:4) claims that the resurrection will begin here when the messiah arrives. The Mount of Olives is a mountain ridge in East Jerusalem whose name dates back thousands of years when

Chet Smolski

1980-01-01

130

Compact attic mounted solar heating pack assembly  

Microsoft Academic Search

A compact attic solar heating pack assembly for mounting within a building attic having south and north facing roof sections overlying a horizontal building attic floor forming the ceiling and defining an enclosed attic space above the occupied room space below the ceiling is described. The pack assembly comprises: a closed sheet metal plenum, means for fixedly mounting the plenum

1988-01-01

131

Millimeter-Wave Substrate Mounted Antenna Measurements  

Microsoft Academic Search

A substrate mounted antenna is a type of integrated circuit antenna that, unlike the microstrip antenna, does not have a ground plane on the bottom surface of the substrate. The measurement apparatus is described, and the rerults of field pattern and absolute gain measurements at 230 GHz w+&-+e presented I. INTRODUCTION The long range goals of the substrate mounted antenna

M. Couker; J. J. Gallagher

1990-01-01

132

Flexible pivot mount eliminates friction and hysteresis  

NASA Technical Reports Server (NTRS)

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.

Highman, C. O.

1970-01-01

133

Design of motor power assembly mounting system  

Microsoft Academic Search

Through an analysis on a decoupling theory, a motor power assembly mounting system is designed and all related parameters are computed for selection directed to excitation characteristics of a motor of a certain model. An optimized design scheme is put forward through a test and an analysis on the energy transfer efficiency of a mounting system. I. INTRODUCTION With the

Chao Dai; Jihui Liang

2011-01-01

134

Microrobotic Protein Crystal Mounting Under Visual Guidance  

E-print Network

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

Georgiev, Atanas

135

GPS Attitude Determination Using Deployable-Mounted Antennas  

NASA Technical Reports Server (NTRS)

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.

Osborne, Michael L.; Tolson, Robert H.

1996-01-01

136

Composite panel development at JPL  

NASA Technical Reports Server (NTRS)

Parametric computer studies can be use in a cost effective manner to determine optimized composite mirror panel designs. An InterDisciplinary computer Model (IDM) was created to aid in the development of high precision reflector panels for LDR. The materials properties, thermal responses, structural geometries, and radio/optical precision are synergistically analyzed for specific panel designs. Promising panels designs are fabricated and tested so that comparison with panel test results can be used to verify performance prediction models and accommodate design refinement. The iterative approach of computer design and model refinement with performance testing and materials optimization has shown good results for LDR panels.

Mcelroy, Paul; Helms, Rich

1988-01-01

137

Design of Fiber Reinforced Foam Sandwich Panels for Large Ares V Structural Applications  

NASA Technical Reports Server (NTRS)

The preliminary design of three major structural components within NASA's Ares V heavy lift vehicle using a novel fiber reinforced foam composite sandwich panel concept is presented. The Ares V payload shroud, interstage, and core intertank are designed for minimum mass using this panel concept, which consists of integral composite webs separated by structural foam between two composite facesheets. The HyperSizer structural sizing software, in conjunction with NASTRAN finite element analyses, is used. However, since HyperSizer does not currently include a panel concept for fiber reinforced foam, the sizing was performed using two separate approaches. In the first, the panel core is treated as an effective (homogenized) material, whose properties are provided by the vendor. In the second approach, the panel is treated as a blade stiffened sandwich panel, with the mass of the foam added after completion of the panel sizing. Details of the sizing for each of the three Ares V components are given, and it is demonstrated that the two panel sizing approaches are in reasonable agreement for thinner panel designs, but as the panel thickness increases, the blade stiffened sandwich panel approach yields heavier panel designs. This is due to the effects of local buckling, which are not considered in the effective core property approach.

Bednarcyk, Brett A.; Arnold, Steven M.; Hopkins, Dale A.

2010-01-01

138

Pre2004 Fire Assembled Panel, Howe Pony Truss Exploded Panel ...  

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

Pre-2004 Fire Assembled Panel, Howe Pony Truss Exploded Panel - Boston & Maine Railroad, Berlin Branch Bridge #148.81, Formerly spanning Moose Brook at former Boston & Maine Railroad, Gorham, Coos County, NH

139

Detail east panel of east truss showing rollling panels and ...  

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

Detail east panel of east truss showing rollling panels and counter weights. View south - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

140

Evaluation of Space Debris Impact on Spacecraft Structure Panels  

NASA Astrophysics Data System (ADS)

Mission-critical components of unmanned spacecraft, such as electronic equipment, are often mounted on the interior surfaces of structure panels. This study investigated debris impact damage to structure panels to assess the degree to which they can protect components. If debris perforates a structure panel but is stopped by the equipment chassis, the impact will not affect the probability of mission success. The ballistic limit of the chassis therefore equals to the damage limit of the structure panel. To estimate this damage limit, hypervelocity impact experiments were conducted on sets of a honeycomb sandwich panel, simulating a structure panel, fixed directly to an aluminum alloy plate, simulating an equipment chassis, with no gap between the two. Debris environment models show that alumina debris particles smaller than 1 mm in diameter are dominant in low earth orbit, and the average impact velocity is over 10 km/sec. However, advanced techniques are required to accelerate small solid projectiles to such speeds, so steel projectiles at 6 km/sec were used to simulate the impact pressure caused by alumina impacting at 9 km/sec. The depths of the resulting impact craters on the chassis plates were measured with an optical microscope, and the damage limit equation of the structure panels was derived from the crater depths. The calculated damage limit equation was compared with the SRL ballistic limit equations. As a result, it was found that the equation obtained in this study showed safety results but was too robust. The stand-off distance between honeycomb sandwich panel and aluminum alloy plate was effective to decrease depths of craters in the plate.

Higashide, Masumi; Onose, Naomi; Hasegawa, Sunao

141

Autonomic solar panel  

Microsoft Academic Search

An autonomic solar heat collecting system is provided. The heart of the system is a solar panel including a flat outer surface adapted to be exposed to the direction of the radiation of the sun. A flat or formed inner sheet is provided which is closely spaced from the outer surface section. Preferably, a flat, transparent plate is provided, which

F. S. Savage; A. D. Long

1978-01-01

142

Advanced Solar Panel Designs  

NASA Technical Reports Server (NTRS)

Solar panel designs that utilize new high-efficiency solar cells and lightweight rigid panel technologies are described. The resulting designs increase the specific power (W/kg) achievable in the near-term and are well suited to meet the demands of higher performance small satellites (smallsats). Advanced solar panel designs have been developed and demonstrated on two NASA SBIR contracts at Applied Solar. The first used 19% efficient, large area (5.5 cm x 6.5 cm) GaAs/Ge solar cells with a lightweight rigid graphite epoxy isogrid substrate configuration. A 1,445 sq cm coupon was fabricated and tested to demonstrate 60 W/kg with a high potential of achieving 80 W/kg. The second panel design used new 22% efficiency, dual-junction GaInP2/GaAs/Ge solar cells combined with a lightweight aluminum core/graphite fiber mesh facesheet substrate. A 1,445 sq cm coupon was fabricated and tested to demonstrate 105 W/kg with the potential of achieving 115 W/kg.

Ralph, E. L.; Linder, E. B.

1995-01-01

143

Solar collector panel  

Microsoft Academic Search

A solar collector panel apparatus is provided which can be easily manufactured in different shapes and capacities. A pair of manifolds is supported in a spaced relationship by one or more conductive tubes. Each tube has a helical wound tube wrapped therearound and having each end operatively connected into one manifold to create a passageway from one manifold to the

Lunsford

1982-01-01

144

Solar heating panel  

Microsoft Academic Search

A solar heating panel includes a unitary rectangular shell having a low thermal conductivity urethane foam liner sandwiched between inner and outer fiberglass boxes. The inner box is impregnated with a dark coloring and has spaced raised support and expansion ridges extending traversely across its bottom. An integral lip located at the top of the shell stiffens its sidewalls and

Eby

1979-01-01

145

Solar cogeneration panels  

Microsoft Academic Search

Photovoltaic panels generate heat as well as electricity and the amount of heat is significantly more than the electrical energy. A project, funded by New York State Research and Development Authority, Natural Resources Canada and Conserval Engineering investigated the method of combining photovoltaic cells with the transpired solar air heater, constructed prototypes, measured the combined electrical and thermal energies produced

J. C. Hollick

1998-01-01

146

Flank instability of Mount Etna  

NASA Astrophysics Data System (ADS)

Mount Etna geodetic and satellite monitoring systems have been recording surface deformation characterized by an instability of the E flank of the volcano for about 20 years. The seaward sliding of the E flank is observed either during summit and flank eruptions but also during quiescent recharging phases. Many investigations have not yet been able to give answers to the following questions: i) is the sliding affecting a thin or thick layer of the volcanic/sedimentary cover? ii) is this movement occurring along a sliding plane or is it accommodated by anelastic deformation? iii) if a sliding plane exists, where is it located? iv) if an anelastic material is responsible for the deformation, is it represented by pleistocenic clays or by the incoherent part of the flysh layers? v) which rheology best represents this behavior? vi) what is the role played by gravity? Unfortunately, indirect investigations such as tomographic, stratigraphic, geoelectric or seismic reflection studies have not been able to provide a unique interpretation of volcanic edifice structure. Our purpose here is to select the most reliable features evidenced by recent studies and build a finite element model able to reproduce the basic patterns of the observed surface deformation. The geometry of the model includes both topography and the top of the sedimentary basement, together with a synthetic reconstruction of the internal layering constrained by geology and seismic tomography. Rheological parameters of the Etnean lithotypes are constrained by laboratory experiments conducted in the framework of FLANK INGV-DPC project. First we study a series of 2D models trying to understand the role of gravity, internal layering, rheology and sliding plane. Then we move to a more realistic and more complex 3D model including also the tectonic structures that may play a relevant role accommodating the observed eastward movements of the E flank. We study the effects of magma accumulation in a isotropic spherical cavity (0.5 km radius) located at almost 5 km b.s.l. northwest of the summit craters, according to the results of numerous recently published papers. Among the results obtained, we want to remark that a significant contribution to increase the deformation in the E sector of Mount Etna may be due to the asymmetrical distribution of elastic parameters related to the presence of a high velocity body underneath summit craters imaged by seismic tomography. Moreover, when yield stress dependent rheologies are taken into account we observe that the initialization of stress in the model is very important. According to different assumptions about the initial stress distribution we predict different results characterized by a total or partial relaxation of the differential stress due to the gravity load. In the first case, only small effects on the computations are observed while in the latter case the flank collapse continuously overestimating the observed deformation. These preliminary results suggest that model assumptions severely influence the assessment of the physical mechanisms that may lead to flank instability.

Cianetti, Spina; Casarotti, Emanuele; Giunchi, Carlo

2010-05-01

147

Drill cuttings mount formation study  

NASA Astrophysics Data System (ADS)

Oil, Gas and Energy sector has been identified as an essential driving force in the Malaysian Economic Transformation Programs (ETP). Recently confirmed discovery of many offshore oil and gas deposits in Malaysian waters has ignited new confidence in this sector. However, this has also spurred intense interest on safeguarding the health and environment of coastal waters in Malaysia from adverse impact resulting from offshore oil and gas production operation. Offshore discharge of spent drilling mud and rock cuttings is the least expensive and simplest option to dispose of large volumes of drilling wastes. But this onsite offshore disposal may have adverse environmental impacts on the water column and the seabed. It may also pose occupational health hazards to the workers living in the offshore platforms. It is therefore important to model the transport and deposition of drilling mud and rock cuttings in the sea to enable proper assessment of their adverse impacts on the environment and the workers. Further, accumulation of drill particles on the seabed may impede proper operation of pipelines on the seabed. In this paper, we present an in-house application model TUNA-PT developed to cater to local oil and gas industry needs to simulate the dispersion and mount formation of drill cuttings by offshore oil and gas exploration and production platforms. Using available data on Malaysian coastal waters, simulation analyses project a pile formation on the seabed with a maximum height of about 1 m and pile radius of around 30 to 50 m. Simulated pile heights are not sensitive to the heights of release of the cuttings as the sensitivity has been mitigated by the depth of water.

Teh, Su Yean; Koh, Hock Lye

2014-07-01

148

Aerospace Safety Advisory Panel  

NASA Technical Reports Server (NTRS)

This report covers the activities of the Aerospace Safety Advisory Panel (ASAP) for calendar year 1998-a year of sharp contrasts and significant successes at NASA. The year opened with the announcement of large workforce cutbacks. The slip in the schedule for launching the International Space Station (ISS) created a five-month hiatus in Space Shuttle launches. This slack period ended with the successful and highly publicized launch of the STS-95 mission. As the year closed, ISS assembly began with the successful orbiting and joining of the Functional Cargo Block (FGB), Zarya, from Russia and the Unity Node from the United States. Throughout the year, the Panel maintained its scrutiny of NASA's safety processes. Of particular interest were the potential effects on safety of workforce reductions and the continued transition of functions to the Space Flight Operations Contractor. Attention was also given to the risk management plans of the Aero-Space Technology programs, including the X-33, X-34, and X-38. Overall, the Panel concluded that safety is well served for the present. The picture is not as clear for the future. Cutbacks have limited the depth of talent available. In many cases, technical specialties are 'one deep.' The extended hiring freeze has resulted in an older workforce that will inevitably suffer significant departures from retirements in the near future. The resulting 'brain drain' could represent a future safety risk unless appropriate succession planning is started expeditiously. This and other topics are covered in the section addressing workforce. The major NASA programs are also limited in their ability to plan property for the future. This is of particular concern for the Space Shuttle and ISS because these programs are scheduled to operate well into the next century. In the case of the Space Shuttle, beneficial and mandatory safety and operational upgrades are being delayed because of a lack of sufficient present funding. Likewise, the ISS has little flexibility to begin long lead-time items for upgrades or contingency planning. For example, the section on computer hardware and software contains specific findings related to required longer range safety-related actions. NASA can be proud of its accomplishments this past year, but must remain ever vigilant, particularly as ISS assembly begins to accelerate. The Panel will continue to focus on both the short- and long-term aspects of risk management and safety planning. This task continues to be made manageable and productive by the excellent cooperation the Panel receives from both NASA and its contractors. Particular emphasis will continue to be directed to longer term workforce and program planning issues as well as the immediate risks associated with ISS assembly and the initial flights of the X-33 and X-34. Section 2 of this report presents specific findings and recommendations generated by ASAP activities during 1998. Section 3 contains more detailed information in support of these findings and recommendations. Appendix A is a current roster of Panel members, consultants, and staff. Appendix B contains NASA's response to the findings and recommendations from the 1997 ASAP Annual Report. Appendix C details the fact-finding activities of the Panel in 1998. During the year, Mr. Richard D. Blomberg was elected chair of the Panel and Vice Admiral (VADM) Robert F Dunn was elected deputy chair. VADM Bernard M. Kauderer moved from consultant to member. Mr. Charles J. Donlan retired from the Panel after many years of meritorious service. Ms. Shirley C. McCarty and Mr. Robert L. ('Hoot') Gibson joined the Panel as consultants.

1999-01-01

149

Advanced solar panel designs  

NASA Technical Reports Server (NTRS)

Solar panel designs that utilize new high-efficiency solar cells and lightweight rigid panel technologies are described. The resulting designs increase the specific power (W/kg) achievable in the near-term and are well suited to meet the demands of higher performance small satellites (smallsats). Advanced solar panel designs have been developed and demonstrated on two NASA SBIR contracts at Applied Solar. The first used 19% efficient, large area (5.5 cm x 6.5 cm) GaAs/Ge solar cells with a lightweight rigid graphite epoxy isogrid substrate configuration. A 1,445 cm(exp 2) coupon was fabricated and tested to demonstrate 60 W/kg with a high potential of achieving 80 W/kg. The second panel design used new 22% efficiency, dual junction GaInP2/GaAs/Ge solar cells combined with a lightweight aluminum core/graphite fiber mesh facesheet substrate. A 1,445 cm(exp 2) coupon was fabricated and tested to demonstrate 105 W/kg with the potential of achieving 115 W/kg. This paper will address the construction details for the GaAs/isogrid and dual-junction GaAs/carbon mesh panel configurations. These are ultimately sized to provide 75 Watts and 119 Watts respectively for smallsats or may be used as modular building blocks for larger systems. GaAs/isogrid and dual-junction GaAs/carbon mesh coupons have been fabricated and tested to successfully demonstrate critical performance parameters and results are also provided here.

Ralph, E. L.; Linder, E. B.

1996-01-01

150

Decoupling analysis for a powertrain mounting system with a combination of hydraulic mounts  

NASA Astrophysics Data System (ADS)

The existing torque roll axis(TRA) decoupling theories for a powertrain mounting system assume that the stiffness and viscous damping properties are constant. However, real-life mounts exhibit considerable spectrally varying stiffness and damping characteristics, and the influence of the spectrally-varying properties of the hydraulic mounts on the powertrain system cannot be ignored. To overcome the deficiency, an analytical quasi-linear model of the hydraulic mount and the coupled properties of the powertrain and hydraulic mounts system are formulated. The influence of the hydraulic mounts on the TRA decoupling of a powertrain system is analytically examined in terms of eigensolutions, frequency, and impulse responses, and then a new analytical axiom is proposed based on the TRA decoupling indices. With the experimental setup of a fixed decoupler hydraulic mount in the context of non-resonant dynamic stiffness testing procedure, the quasi-linear model of the hydraulic mount is verified by comparing the predictions with the measurement. And the quasi-linear formulation of the coupled system is also verified by comparing the frequency responses with the numerical results obtained by the direct inversion method. Finally, the mounting system with a combination of hydraulic mounts is redesigned in terms of the stiffness, damping and mount locations by satisfying the new axiom. The frequency and time domain results of the redesigned system demonstrate that the torque roll axis of the redesigned powertrain mounting system is indeed decoupled in the presence of hydraulic mounts (given oscillating torque or impulsive torque excitation). The proposed research provides an important basis and method for the research on a powertrain system with spectrally-varying mount properties, especially for the TRA decoupling.

Hu, Jinfang; Chen, Wuwei; Huang, He

2013-07-01

151

Vibration dissipation mount for motors or the like  

DOEpatents

A vibration dissipation mount which permits the mounting of a motor, generator, or the like such that the rotatable shaft thereof passes through the mount and the mount permits the dissipation of self-induced and otherwise induced vibrations wherein the mount comprises a pair of plates having complementary concave and convex surfaces, a semi-resilient material being disposed therebetween.

Small, Thomas R. (Brookeville, MD)

1987-01-01

152

Mount Shasta Wilderness study area, California  

SciTech Connect

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.

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

1984-01-01

153

Two degree of freedom camera mount  

NASA Technical Reports Server (NTRS)

A two degree of freedom camera mount. The camera mount includes a socket, a ball, a first linkage and a second linkage. The socket includes an interior surface and an opening. The ball is positioned within an interior of the socket. The ball includes a coupling point for rotating the ball relative to the socket and an aperture for mounting a camera. The first and second linkages are rotatably connected to the socket and slidably connected to the coupling point of the ball. Rotation of the linkages with respect to the socket causes the ball to rotate with respect to the socket.

Ambrose, Robert O. (Inventor)

2003-01-01

154

An orientable solar panel system for nanospacecraft  

NASA Astrophysics Data System (ADS)

An orientable deployed solar array system for 1-5 kg weight nanospacecraft is described, enhancing the achievable performance of these typically power-limited systems. The system is based on a deployable solar panel system, previously developed with cooperation between Laboratorio di Sistemi Aerospaziali of University of Roma “la Sapienza” and the company IMT (Ingegneria Marketing Tecnologia). The system proposed is a modular one, and suitable in principle for the 1U, 2U and 3U standard Cubesat bus, even if the need for three axis attitude stabilization makes it typically preferred for 3U Cubesats. The size of each solar panel is the size of a lateral Cubesat surface. A single degree of freedom maneuvering capability is given to the deployed solar array, in order to follow the apparent motion of the sun as close as possible, given the mission requirements on the spacecraft attitude. Considerable effort has been devoted to design the system compatible with the Cubesat standard, being mounted outside on the external spacecraft structure, without requiring modifications on the standard prescriptions. The small available volume is the major constraint, which forces to use miniaturized electric motor technology. The system design trade-off is discussed, leading to the selection of an architecture based on two independently steerable solar array wings.

Santoni, Fabio; Piergentili, Fabrizio; Candini, Gian Paolo; Perelli, Massimo; Negri, Andrea; Marino, Michele

2014-08-01

155

Medical Physics Panel Discussion  

NASA Astrophysics Data System (ADS)

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.

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

2006-03-01

156

Lightweight, Thermally Insulating Structural Panels  

NASA Technical Reports Server (NTRS)

Lightweight, thermally insulating panels that also serve as structural members developed. Honeycomb-core panel filled with low-thermal-conductivity, opacified silica aerogel preventing convection and minimizes internal radiation. Copper coating on face sheets reduces radiation. Overall thermal conductivities of panels smaller than state-of-art commercial non-structurally-supporting foam and fibrous insulations. On Earth, panels suitable for use in low-air-pressure environments in which lightweight, compact, structurally supporting insulation needed; for example, aboard high-altitude aircraft or in partially evacuated panels in refrigerators.

Eisen, Howard J.; Hickey, Gregory; Wen, Liang-Chi; Layman, William E.; Rainen, Richard A.; Birur, Gajanana C.

1996-01-01

157

49 CFR 179.10 - Tank mounting.  

Code of Federal Regulations, 2012 CFR

...TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS General Design Requirements § 179.10 Tank mounting. (a) The manner in which tanks are attached to the car structure shall be approved. The use of rivets...

2012-10-01

158

49 CFR 179.10 - Tank mounting.  

Code of Federal Regulations, 2010 CFR

...HAZARDOUS MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS General Design Requirements § 179.10 Tank mounting. (a) The manner in which tanks are attached to the car structure shall be approved. The use of rivets...

2010-10-01

159

49 CFR 179.10 - Tank mounting.  

Code of Federal Regulations, 2013 CFR

...TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS General Design Requirements § 179.10 Tank mounting. (a) The manner in which tanks are attached to the car structure shall be approved. The use of rivets...

2013-10-01

160

49 CFR 179.10 - Tank mounting.  

Code of Federal Regulations, 2011 CFR

...TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS General Design Requirements § 179.10 Tank mounting. (a) The manner in which tanks are attached to the car structure shall be approved. The use of rivets...

2011-10-01

161

Microgravity isolation mounts based upon Piezoelectric film  

NASA Technical Reports Server (NTRS)

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.

Vonflotow, Andreas

1992-01-01

162

Composite materials in dynamic shipboard structural mounts  

E-print Network

The purpose of this thesis is to investigate the viability of replacing traditional metal structural and machinery mounts with padding made of composite material. The two types of padding or isolation materials are represented ...

Faulk, Joanna (Joanna E.)

2011-01-01

163

Research Note Radiotransmitter Mount Type Affects Burrowing  

E-print Network

Research Note Radiotransmitter Mount Type Affects Burrowing Owl Survival JENNIFER A. GERVAIS,1 cunicularia, backpack harnesses, burrowing owl, California, radiocollars, radiotagging mortality. Burrowing owls (Athene cunicularia) typify a species whose relatively small size (ca. 150 g; Haug et al

Gervais, Jennifer

164

High frequency testing of rubber mounts.  

PubMed

Rubber and fluid-filled rubber engine mounts are commonly used in automotive and aerospace applications to provide reduced cabin noise and vibration, and/or motion accommodations. In certain applications, the rubber mount may operate at frequencies as high as 5000 Hz. Therefore, dynamic stiffness of the mount needs to be known in this frequency range. Commercial high frequency test machines are practically nonexistent, and the best high frequency test machine on the market is only capable of frequencies as high as 1000 Hz. In this paper, a high frequency test machine is described that allows test engineers to study the high frequency performance of rubber mounts at frequencies up to 5000 Hz. PMID:12071247

Vahdati, Nader; Saunders, L Ken Lauderbaugh

2002-04-01

165

for doubling solar panel  

E-print Network

An outline for doubling solar panel efficiency C o l o ra do S c ho o l of M i ne s Ma g a z i ne QUANTUMQUANTUM DOTS #12;18 MINES Fall 2012 Colorado School of Mines Magazine 19 T Engineering a in Solar Power in a contemporary solar cell. "In terms of efficiency, there is a lot of room for improve- ment up there," he says

166

Clinical Space Medicine Panel  

NASA Technical Reports Server (NTRS)

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.

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

2000-01-01

167

X-band slotted array test panel and test fixture  

NASA Technical Reports Server (NTRS)

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.

1979-01-01

168

History and hazards of Mount Rainier, Washington  

USGS Publications Warehouse

Mount Rainier is an active volcano that first erupted about half a million years ago. Because of Rainier's great height (14,410 feet above sea level) and northerly location, glaciers have cut deeply into its lavas, making it appear deceptively older than it actually is. Mount Rainier is known to have erupted as recently as in the 1840s, and large eruptions took place as recently as about 1,000 and 2,300 years ago.

Sisson, Thomas W.

1995-01-01

169

Motorized control for mirror mount apparatus  

DOEpatents

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.

Cutburth, Ronald W. (Tracy, CA)

1989-01-01

170

Model mount system for testing flutter  

NASA Technical Reports Server (NTRS)

A wind tunnel model mount system is disclosed for effectively and accurately determining the effects of attack and airstream velocity on a model airfoil or aircraft. The model mount system includes a rigid model attached to a splitter plate which is supported away from the wind tunnel wall several of flexible rods. Conventional instrumentation is employed to effect model rotation through a turntable and to record model flutter data as a function of the angle of attack versus dynamic pressure.

Farmer, M. G. (inventor)

1984-01-01

171

Raster graphic helmet-mounted display study  

NASA Technical Reports Server (NTRS)

A design of a helmet mounted display system is presented, including a design specification and development plan for the selected design approach. The requirements for the helmet mounted display system and a survey of applicable technologies are presented. Three helmet display concepts are then described which utilize lasers, liquid crystal display's (LCD's), and subminiature cathode ray tubes (CRT's), respectively. The laser approach is further developed in a design specification and a development plan.

Beamon, William S.; Moran, Susanna I.

1990-01-01

172

Development of Quiet Honeycomb Panels  

NASA Technical Reports Server (NTRS)

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.

Palumbo, Daniel L.; Klos, Jacob

2009-01-01

173

Aerospace Safety Advisory Panel  

NASA Technical Reports Server (NTRS)

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.

2002-01-01

174

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

NASA Technical Reports Server (NTRS)

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.

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

1987-01-01

175

Mounting for duty cycle control switch for ceiling mounted ductless heater  

SciTech Connect

This patent describes a ceiling mounted heat exchanger having a blower means to blow air through the heat exchanger and through an outlet; a bracket mounted forwardly of the outlet, the bracket including a tapered conduit, the conduit having an inlet end and an outlet end and mounted to the heater with the inlet end positioned with respect to the outlet from the heat exchange to receive air blown by the blower through the outlet; means to mount a temperature sensitive switch forwardly of the tapered conduit whereby air passing through the tapered conduit and through the outlet of the conduit contacts the temperature sensitive switch.

Welch, D.

1988-10-18

176

Aerospace Safety Advisory Panel  

NASA Technical Reports Server (NTRS)

This report covers the activities of the Aerospace Safety Advisory Panel (ASAP) for calendar year 1998-a year of sharp contrasts and significant successes at NASA. The year opened with the announcement of large workforce cutbacks. The slip in the schedule for launching the International Space Station (ISS) created a 5-month hiatus in Space Shuttle launches. This slack period ended with the successful and highly publicized launch of the STS-95 mission. As the year closed, ISS assembly began with the successful orbiting and joining of the Functional Cargo Block (FGB), Zarya, from Russia and the Unity Node from the United States. Throughout the year, the Panel maintained its scrutiny of NASAs safety processes. Of particular interest were the potential effects on safety of workforce reductions and the continued transition of functions to the Space Flight Operations Contractor. Attention was also given to the risk management plans of the Aero-Space Technology programs, including the X-33, X-34, and X-38. Overall, the Panel concluded that safety is well served for the present. The picture is not as clear for the future. Cutbacks have limited the depth of talent available. In many cases, technical specialties are "one deep." The extended hiring freeze has resulted in an older workforce that will inevitably suffer significant departures from retirements in the near future. The resulting "brain drain" could represent a future safety risk unless appropriate succession planning is started expeditiously. This and other topics are covered in the section addressing workforce. In the case of the Space Shuttle, beneficial and mandatory safety and operational upgrades are being delayed because of a lack of sufficient present funding. Likewise, the ISS has little flexibility to begin long lead-time items for upgrades or contingency planning.

1999-01-01

177

Microsphere Insulation Panels  

NASA Technical Reports Server (NTRS)

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.

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

2006-01-01

178

Aerospace Safety Advisory Panel  

NASA Technical Reports Server (NTRS)

The results of the Panel's activities are presented in a set of findings and recommendations. Highlighted here are both improvements in NASA's safety and reliability activities and specific areas where additional gains might be realized. One area of particular concern involves the curtailment or elimination of Space Shuttle safety and reliability enhancements. Several findings and recommendations address this area of concern, reflecting the opinion that safety and reliability enhancements are essential to the continued successful operation of the Space Shuttle. It is recommended that a comprehensive and continuing program of safety and reliability improvements in all areas of Space Shuttle hardware/software be considered an inherent component of ongoing Space Shuttle operations.

1992-01-01

179

Modal analysis of gear housing and mounts  

NASA Technical Reports Server (NTRS)

Dynamic finite element analysis of a real gear housing is presented. The analysis was conducted for the housing without the rotating components (gears, shafts, and bearings). Both rigid and flexible mounting conditions for the gear housing are considered in this analysis. The flexible support simulates the realistic mounting condition on a rotorcraft, and the rigid one is analyzed for comparison purposes. The effect of gear housing stiffeners is also evaluated. The results indicate that the first six natural modes of the flexibly mounted gear housing in the 0 to 200 Hz range correspond to the translational and rotational rigid body vibration modes of the housing. Above this range, the housing plate elastic modes begin to occur. In the case of the rigid mount, only the housing plate elastic modes are observed which are verified by modal analysis experiments. Parametric studies show that the housing plate stiffeners and rigid mounts tend to increase most of the natural frequencies, the lower ones being affected the most.

Lim, Teik C.; Singh, RAJ.; Zakrajsek, James J.

1989-01-01

180

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

NASA Technical Reports Server (NTRS)

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.

Stegles, Katrine S.

2008-01-01

181

Heat Recovery From Arc Furnaces Using Water Cooled Panels  

E-print Network

, deter ioration, and erosion. Heavy wall seamless steel pipe is cast into each panel to form the water passages. This de sign provides 7 inch thick sections of cast iron that resist damage even when heavy scrap is charged into the furnace. Cooling... exchanger HE-l whose secondary side is connected to the heat/vent units via the glycol distribution piping. The primary water than passes through a water to water heat exchanger HE-2 (whose secondary side is connected to the cooling tower CT...

Darby, D. F.

182

Microgap flat panel display  

DOEpatents

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.

Wuest, C.R.

1998-12-08

183

Microgap flat panel display  

DOEpatents

A microgap flat panel display 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.

Wuest, Craig R. (Danville, CA)

1998-01-01

184

Mounting system for optical frequency reference cavities  

NASA Technical Reports Server (NTRS)

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.

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

2008-01-01

185

A mirror mount for cryogenic environments  

NASA Technical Reports Server (NTRS)

The finite element method was used to study the effect of mount-induced aberrations on the optical surface of a lightweight double arch mirror subjected to cryogenic temperatures. The mount design was controlled by the requirements imposed on the optical surface quality and stress levels. The finite element analysis was used to define the feasible range of mount parameters and the selection of a design within the feasible region. The final design consisted of three spring-loaded Invar T-clamps that uniquely define the location of the mirror, three radially compliant parallel spring guides that remove the effect of radial contraction of structure in cryogenic temperatures, and a flexible baseplate that was used to reduce the effect of temperature-induced baseplate tilt errors. The experimental results from the application of this system to an existing 20-inch fused silica double arch mirror are shown, and possible improvements in system performance are discussed.

Iraninejad, B.; Vukobratovich, D.; Richard, R. M.; Melugin, R. K.

1984-01-01

186

System requirements for head down and helmet mounted displays in the military avionics environment  

SciTech Connect

The introduction of flat panel display technologies into the military avionics cockpit is a challenging proposition, due to the very difficult system level requirements which must be met. These relate to environmental extremes (temperature and vibrational), sever ambient lighting conditions (10,000 fL to nighttime viewing), night vision system compatibility, and wide viewing angle. At the same time, the display system must be packaged in minimal space and use minimal power. The authors will present details on the display system requirements for both head down and helmet mounted systems, as well as information on how these challenges may be overcome.

Flynn, M.F.; Kalmanash, M.; Sethna, V. [Kaiser Electronics, San Jose, CA (United States)

1996-12-31

187

Panel installation development in Automated Structures Assembly Lab  

NASA Technical Reports Server (NTRS)

The design requirements for panel installation process are listed and photographs are presented of the following: panel latches to truss via adaptors; panel end effector; arm retrieving panel from canister; arm installing panel; and facility view with panel installed.

Quach, Cuong

1992-01-01

188

Sensor mount assemblies and sensor assemblies  

DOEpatents

Sensor mount assemblies and sensor assemblies are provided. In an embodiment, by way of example only, a sensor mount assembly includes a busbar, a main body, a backing surface, and a first finger. The busbar has a first end and a second end. The main body is overmolded onto the busbar. The backing surface extends radially outwardly relative to the main body. The first finger extends axially from the backing surface, and the first finger has a first end, a second end, and a tooth. The first end of the first finger is disposed on the backing surface, and the tooth is formed on the second end of the first finger.

Miller, David H. (Redondo Beach, CA)

2012-04-10

189

Predicted and measured strain responses of isotropic panels to base excitation  

NASA Technical Reports Server (NTRS)

The accuracy of classical linear theory for predicting acceleration and strain for cantilevered and Clamped-Free-Clamped-Free (C-F-C-F) panels excited through the base is studied. Aluminum, steel and titanium plates of various dimensions and thicknessess were vibration tested, using a broadband random signal applied through a shaker mounting fixture. The strains were measured at 9 locations on the cantilevered panels and at 5 locations on the C-F-C-F panels. Predictions were based on the Ritz method. The measured accelerations of the base were input to the analysis for the forcing function. Comparisons between predicted and measured strain acceleration spectra were within an average error of 20 percent for both the cantilevered and C-F-C-F panels.

Lyle, Karen H.; Leatherwood, Jack D.; Daniels, Edward F.

1988-01-01

190

Enhancing Presence in Head-mounted Display Environments by Visual Body Feedback Using Head-mounted Cameras  

E-print Network

Enhancing Presence in Head-mounted Display Environments by Visual Body Feedback Using Head-mounted a realistic view of oneself in virtual environments using cameras attached to head mounted displays. Keywords-Head-mounted displays; augmented virtuality; presence I. INTRODUCTION In 1965 Sutherland discussed

Hinrichs, Klaus

191

EOS Panel begins review  

NASA Astrophysics Data System (ADS)

Charged with “assessing alternatives for the implementation of the Earth Observing System,” a NASA-appointed panel of scientists and engineers began their investigation of the multibillion dollar program last month with a meeting at NASA Headquarters in Washington. The Earth Observing System (EOS) Engineering Review Advisory Committee, chaired by Edward A. Frieman, director of the Scripps Institution of Oceanography, heard from Administration officials, NASA managers, and EOS project personnel on May 30-31.The committee was created at the request of the Bush administration to evaluate NASA's current plans for the series of satellites, EOS-A and EOS-B, scheduled to begin operation in 1998. The committee's primary emphasis is to review the engineering aspects of the program, including platform size, instrument configuration, and launch options. A final report is expected by September 30.

Cole, Stephen

192

Optics Alignment Panel  

NASA Technical Reports Server (NTRS)

The Optics Alignment Panel (OAP) was commissioned by the HST Science Working Group to determine the optimum alignment of the OTA optics. The goal was to find the position of the secondary mirror (SM) for which there is no coma or astigmatism in the camera images due to misaligned optics, either tilt or decenter. The despace position was reviewed of the SM and the optimum focus was sought. The results of these efforts are as follows: (1) the best estimate of the aligned position of the SM in the notation of HDOS is (DZ,DY,TZ,TY) = (+248 microns, +8 microns, +53 arcsec, -79 arcsec), and (2) the best focus, defined to be that despace which maximizes the fractional energy at 486 nm in a 0.1 arcsec radius of a stellar image, is 12.2 mm beyond paraxial focus. The data leading to these conclusions, and the estimated uncertainties in the final results, are presented.

Schroeder, Daniel J.

1992-01-01

193

A new specimen of the Mount Dooling iron meteorite from Mount Manning, Western Australia  

NASA Astrophysics Data System (ADS)

The discovery of an iron meteorite near the Mount Manning Range in Western Australia which has been identified with the Mount Dooling meteorite is reported. The 701-kg iron meteorite was found embedded in the ground at a site 3 km east of the Mount Manning Range and approximately 6 km from the probable discovery site of Mount Dooling. The meteorite has a fan-shaped or delta wing configuration, with one side smooth and slightly concave with a well defined fusion crust and the other side rough, convex and possessing numerous regmaglypts; it is suggested that the meteorite performed a delta-wing-like flight at high angle of attack through much of the atmosphere. A comparison of the chemical composition, surface features, microstructure and location of the present meteorite with those of the Mount Dooling siderite confirms that the find represents a larger specimen of Mount Dooling. In light of the present discovery and that of another Mount Dooling fragment, Gosnells, it is predicted that other specimens may be discovered in the future.

de Laeter, J. R.

1980-06-01

194

Panel Closure Redesign: August 2011  

E-print Network

Panel Closure Redesign: Update August 2011 Thomas Klein-URS, Regulatory and Environmental Services aspects: ·Major Design Criteria ·Research Activities ·Interim Closure ·Gas Monitoring ·Current Research changes needed to the panel closure design after initial investigations. These changes were: 1. Replace

195

Thermal-Diode Sandwich Panel  

NASA Technical Reports Server (NTRS)

Thermal diode sandwich panel transfers heat in one direction, but when heat load reversed, switches off and acts as thermal insulator. Proposed to control temperature in spacecraft and in supersonic missiles to protect internal electronics. In combination with conventional heat pipes, used in solar panels and other heat-sensitive systems.

Basiulis, A.

1986-01-01

196

Plane and parabolic solar panels  

E-print Network

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.

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

2009-05-14

197

Plane and parabolic solar panels  

Microsoft Academic Search

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.

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

2009-01-01

198

Plane and parabolic solar panels  

Microsoft Academic Search

We present a plane and parabolic collector that absorbs radiant energy and\\u000atransforms it in heat. Therefore we have a panel to heat water. We study how to\\u000aincrement this capture of solar beams onto the panel in order to increase its\\u000aefficiency in heating water.

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

2009-01-01

199

An Integrated Cyber Panel System  

Microsoft Academic Search

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

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

2003-01-01

200

Aerospace Safety Advisory Panel  

NASA Technical Reports Server (NTRS)

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.

2001-01-01

201

Electrode mounting in DC arc furnace vessels  

Microsoft Academic Search

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

1986-01-01

202

High Performance Aircraft Helmet Mounted Display Research  

NASA Technical Reports Server (NTRS)

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.

1991-01-01

203

TAIL-MOUNTED RADIO TRANSMITTERS FOR WATERFOWL  

Microsoft Academic Search

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

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

204

Mount St. Helens, May 18, 1980  

NSDL National Science Digital Library

This GIF image is part of the U.S. Geological Survey's Cascades Volcano Observatory website, which includes pictures (archived and real-time), written reports, seismic data, and other materials on volcanology, including a glossary and links to other relevant sites. These images show Mount St. Helens while it was erupting on May 18th, 1980.

205

Fixture for mounting small parts for processing  

DOEpatents

A fixture for mounting small parts, such as fusion target spheres or microelectronic components. A glass stalk is drawn and truncated near its tip. The truncated end of the glass stalk is dipped into silicone rubber forming an extending streamer. After the rubber cures for approximately 24 hours, a small part is touched to the streamer, and will be held securely throughout processing.

Foreman, Larry R. (2456 36th St., Los Alamos, NM 87544); Gomez, Veronica M. (Rte. 5 Box 283, Santa Fe, NM 87501); Thomas, Michael H. (Rte. 3-193-1, Espanola, NM 87532)

1990-01-01

206

Modular plants2. Barge-mounted plants  

Microsoft Academic Search

Barge-mounted plants built at shipyards and towed to a final site by sea or river, or transported dry on a dockship have several advantages over land-built plants, including lesser costs, particularly when sited in developing countries, ease of delivery, and flexible adaptation to production needs, such as changes of site to be near raw materials. Installation at the operating site

Charpentier

1979-01-01

207

Vibration mounts for noise and vibration control  

SciTech Connect

Isolating noise and vibration is of major importance in engine applications whether on board ship or land. Ulstein Bergen, for instance, has virtually standardized on Metalastik D Series mounts for its range of lean-burn, gas engines used in power generation and cogeneration plants. In the largest engine installations, the Metalastik suspension system can carry as much as 47 tons, total weight. The system is designed to isolate the forces generated by a three megawatt engine able to develop full power within 10 seconds of starting. In setups of this size, as many as 24 mounts are arranged underneath the baseplate of the power unit. Metalastik recently announced an entirely new and innovative mounting for marine applications. The new Cushymount K mounting incorporates four separate rubber/metal spring elements housed between top and bottom iron castings. The design combines three-way control of engine movement with relatively large deflection in the rubber. The new design is claimed to be robust and easy to install by means of four bolt holes on the top and bottom castings. Other recommended applications include compressors, exhaust gas silencers, refrigeration/air-conditioning plant and similar ancillary equipment. 2 figs.

Mullins, P.

1995-04-01

208

Exploring QCD with Heavy Ion Collisions  

E-print Network

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.

Mark D. Baker

2003-09-02

209

76 FR 23845 - Arts Advisory Panel  

Federal Register 2010, 2011, 2012, 2013

...THE ARTS AND THE HUMANITIES National Endowment for the Arts Arts Advisory Panel Pursuant...Guidelines & Panel Operations, National Endowment for the Arts, Washington, DC 20506...Coordinator, Panel Operations, National Endowment for the Arts. [FR Doc....

2011-04-28

210

76 FR 3677 - Arts Advisory Panel  

Federal Register 2010, 2011, 2012, 2013

...THE ARTS AND THE HUMANITIES National Endowment for the Arts Arts Advisory Panel Pursuant...Guidelines & Panel Operations, National Endowment for the Arts, Washington, DC 20506...Coordinator, Panel Operations, National Endowment for the Arts. [FR Doc....

2011-01-20

211

Panelized wall system with foam core insulation  

DOEpatents

A wall system includes a plurality of wall members, the wall members having a first metal panel, a second metal panel, and an insulating core between the first panel and the second panel. At least one of the first panel and the second panel include ridge portions. The insulating core can be a foam, such as a polyurethane foam. The foam can include at least one opacifier to improve the k-factor of the foam.

Kosny, Jan (Oak Ridge, TN); Gaskin, Sally (Houston, TX)

2009-10-20

212

Bonded Bracket Assmebly for Frameless Solar Panels  

SciTech Connect

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.

Murray, Todd

2013-01-30

213

Cryogenic Shrouds for Testing Thermal-Insulation Panels  

NASA Technical Reports Server (NTRS)

Cryogenic shrouds have been designed and built for use in thermomechanical testing of samples of thermalinsulation panels on cryogenic vessels. In the original application for which these shrouds were specifically designed, the samples are representative of the large-area thermal-insulation panels on the space-shuttle external tanks that hold liquid hydrogen and liquid oxygen, and the purpose of the testing is to demonstrate the ability of bonded layers in the panels to resist delamination under a combination of applied uniaxial mechanical loads and realistic operational temperatures. Presumably, the shrouds and the tests performed by use of them could be modified to enable similar evaluation of thermomechanical properties of thermal-insulation panels for cryogenic vessels other than the external tanks of the space shuttles. The shrouds are required to enable maintenance of required temperatures on the inner and outer surfaces of the thermal-insulation-panel samples, to enable visual observation of the outer surfaces of the samples, and not to introduce any measurable loads into the panels. For each panel sample, there are two shrouds: one to be mounted on the inner surface (the surface that would be in contact with a tank containing a cryogenic liquid during normal use) and one to be mounted on the outer surface (the surface that would be exposed to ambient air or other warmer environment during normal use). The shrouds for testing specimens of thermal-insulation- panels for the liquid-hydrogen tank are made largely of titanium; the shrouds for testing specimens of thermal- insulation-panels for the liquid-oxygen tank are made largely of an aluminum- lithium alloy. The specific temperature requirements are the following: The inner shroud must make it possible to maintain a temperature of 321 degrees F (196 degrees C) [the approximate temperature of liquid nitrogen] or 453 F (about 269 C) [the approximate temperature of liquid helium] on the inner face of the sample. The outer shroud must make it possible to maintain a temperature between 30 degrees and 0 degrees F (between about 34 degrees and about 18 degrees C) on the outer surface of the sample by blowing a cryogenic gas or missile grade air along that surface. To enable viewing of the outer surface of the sample during testing, the outer shroud includes a window comprising two layers of poly(methyl methacrylate) with a gap between them to reduce fogging. To ensure that the shrouds do not introduce any measurable loads into a panel specimen, the shrouds are cushioned on the specimen by seals made of a fluoropolymer-membrane/fabric composite material and are held in place on the specimen by means of symmetrically placed clamps with poly(tetrafluoroethylene) pads. Instrumentation ports for thermocouples and strain gauges used in the tests are incorporated into the shrouds.

Norris, Jeffrey; Carroll, Robert; Kirch, Charles

2007-01-01

214

Acoustic fatigue and sound transmission characteristics of a ram composite panel design  

NASA Technical Reports Server (NTRS)

An experimental study to determine the acoustic fatigue characteristics of a flat multi-layered structural panel is described. The test panel represented a proposed design for the outer skin of a research application module to be housed within the space shuttle orbiter vehicle. The test specimen was mounted in one wall of the Wyle 100,000 cu ft reverberation room and exposed to a broadband acoustic environment having an overall level of 145 db. The test panel was exposed to nine separate applications of the acoustic environment, each application consisting of 250 seconds duration. Upon completion of the ninth test run, the specimen was exposed to a simulated micrometeoroid impact near the panel center. One additional test run of 250 seconds duration was then performed to complete the overall simulation of 50 flight missions. The experimental results show that no significant fatigue damage occurred until the test specimen was exposed to a simulated micrometeoroid impact. The intermediate foam layer forming the core of the test specimen suffered considerable damage due to this impact, causing a marked variation in the dynamic characteristics of the overall test panel. During the final application of the acoustic environment, the strain and acceleration response spectra showed considerable variation from those spectra obtained prior to impact of the panel. Fatigue damage from acoustic loading however, was limited to partial de-bonding around the edges of the composite panel.

Cockburn, J. A.; Chang, K. Y.; Kao, G. C.

1972-01-01

215

Systems and methods for mirror mounting with minimized distortion  

NASA Technical Reports Server (NTRS)

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.

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

2012-01-01

216

Aerospace Safety Advisory Panel  

NASA Astrophysics Data System (ADS)

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.

1989-03-01

217

Expandable panel and truss system/antenna/solar panel  

SciTech Connect

Disclosed is an expandable panel and truss structure capable of being stowed in a storage container (canister) for transportation into space and deployed to form structures such as antennas, solar panels or similar space or terrestial structures. The antenna formed comprises the panels stored as hinged pairs (sets) folded in accordian-like fashion together with the expandable trusses and other devices necessary for antenna space operation, such as attitude control and antenna feed. The panel sets are deployed from the canister to form a toroidal ring, circular in cross-section when deployed, for supporting the antenna lens and to form a feed support boom utilizing the canister as part of the antenna structure. The canister is connected to the ring and support boom in the deployed state by the expandable trusses. A fully automatic system is included for deploying the antenna and for holding the antenna structure in its deployed state. By adding a second (back) boom and reflector screen, a paraboloidal antenna is formed. In a second embodiment, utilizing the same storage and deployment principle but with panel sets which are triangular in cross-section, when deployed, either an offset (asymmetrical) paraboloidal or a feed horn type antenna structure is formed. In another embodiment of the invention, utilizing the same principle and with panel sets which are triangular in crosssection, when deployed, a solar panel array is formed. Also disclosed is a foldable truss geostationary platform and package for transfer into a geostationary orbit. Finally, an alternate mechanism is disclosed in the form of a pantograph for deploying panel sets to form a truss.

Slysh, P.

1983-04-12

218

Adjustable link for kinematic mounting systems  

DOEpatents

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.

Hale, L.C.

1997-07-01

219

Adjustable link for kinematic mounting systems  

DOEpatents

An adjustable link for kinematic mounting systems. 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.

Hale, Layton C. (Livermore, CA)

1997-01-01

220

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.

221

Making Sense of Mount St. Helens  

NSDL National Science Digital Library

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.

Steve Nash (University of Richmond; )

2010-09-01

222

Detection Performance of Upgraded "Polished Panel" Optical Receiver Concept on the Deep-Space Network's 34 Meter Research Antenna  

NASA Technical Reports Server (NTRS)

Initial optical communications experiments with a Vertex polished aluminum panel have been described. The polished panel was mounted on the main reflector of the DSN's research antenna at DSS-13. The PSF was recorded via remotely controlled digital camera mounted on the subreflector structure. Initial PSF generated by Jupiter showed significant tilt error and some mechanical deformation. After upgrades, the PSF improved significantly, leading to much better concentration of light. Communications performance of the initial and upgraded panel structure were compared. After the upgrades, simulated PPM symbol error probability decreased by six orders of magnitude. Work is continuing to demonstrate closed-loop tracking of sources from zenith to horizon, and better characterize communications performance in realistic daytime background environments.

Vilnrotter, Victor A.

2012-01-01

223

New mounting improves solar-cell efficiency  

NASA Technical Reports Server (NTRS)

Method boosts output by about 20 percent by trapping and redirecting solar radiation without increasing module depth. Mounted solar-cell array is covered with internally reflecting plate. Plate is attached to each cell by transparent adhesive, and space between cells is covered with layer of diffusely reflecting material. Solar energy falling on space between cells is diffused and reflected internally by plate until it is reflected onto solar cell.

Shepard, N. F., Jr.

1980-01-01

224

Fixture for mounting small parts for processing  

DOEpatents

A fixture for mounting small parts, such as fusion target spheres or microelectronic components is disclosed. A glass stalk is drawn and truncated near its tip. The truncated end of the glass stalk is dipped into silicone rubber forming an extending streamer. After the rubber cures for approximately 24 hours, a small part is touched to the streamer, and will be held securely throughout processing. 5 figs.

Foreman, L.R.; Gomez, V.M.; Thomas, M.H.

1990-05-29

225

Exascale Workshop Panel Report Meeting  

SciTech Connect

The Exascale Review Panel consists of 12 scientists and engineers with experience in various aspects of high-performance computing and its application, development, and management. The Panel hear presentations by several representatives of the workshops and town meetings convened over the past few years to examine the need for exascale computation capability and the justification for a U.S. Department of Energy (DOE) program to develop such capability. This report summarizes information provided by the presenters and substantial written reports to the Panel in advance of the meeting in Washington D.C. on January 19-20, 2010. The report also summarizes the Panel's conclusions with regard to the justification of a DOE-led exascale initiative.

Khaleel, Mohammad A.

2010-07-01

226

MEDICAL EXPENDITURE PANEL SURVEY (MEPS)  

EPA Science Inventory

The Medical Expenditure Panel Survey, or MEPS as it is commonly called, is the third (and most recent) in a series of national probability surveys conducted by AHRQ on the financing and utilization of medical care in the United States....

227

Panel Discussion on Scalar Mesons  

SciTech Connect

A panel discussion on scalar mesons was held with the participation of David Bugg, Yulia Kalashnikova, Keh-Fei Liu, Michael Scadron, the author, and members of the audience. Some introductory remarks are noted here.

Rosner, Jonathan L. [Enrico Fermi Institute, University of Chicago, Chicago, IL 60637 (United States)

2008-08-31

228

Panel Discussion on Scalar Mesons  

NASA Astrophysics Data System (ADS)

A panel discussion on scalar mesons was held with the participation of David Bugg, Yulia Kalashnikova, Keh-Fei Liu, Michael Scadron, the author, and members of the audience. Some introductory remarks are noted here.

Rosner, Jonathan L.

2008-08-01

229

Panel Discussion on Scalar Mesons  

E-print Network

A panel discussion on scalar mesons was held with the participation of David Bugg, Yulia Kalashnikova, Keh-Fei Liu, Michael Scadron, the author, and members of the audience. Some introductory remarks are noted here.

Jonathan L. Rosner

2008-04-04

230

PRSEUS Panel Fabrication Final Report  

NASA Technical Reports Server (NTRS)

NASA and the Boeing Company have been working together under the Environmentally Responsible Aviation Project to develop stitched unitized structure for reduced weight, reduced fuel burn and reduced pollutants in the next generation of commercial aircraft. The structural concept being evaluated is PRSEUS (Pultruded Rod Stitched Efficient Unitized Structure). In the PRSEUS concept, dry carbon fabric, pultruded carbon rods, and foam are stitched together into large preforms. Then these preforms are infused with an epoxy resin into large panels in an out-of-autoclave process. These panels have stiffeners in the length-wise and width-wise directions but contain no fasteners because all stiffeners are stitched to the panel skin. This document contains a description of the fabrication of panels for use in the 30-foot-long Multi-Bay Box test article to be evaluated at NASA LaRC.

Linton, Kim A.; Velicki, Alexander; Hoffman, Krishna; Thrash, Patrick; Pickell, Robert; Turley, Robert

2014-01-01

231

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

232

Panel to review EOSDIS plans  

NASA Technical Reports Server (NTRS)

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.

1994-01-01

233

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.

234

Two Thick Microwave Dichroic Panels  

NASA Technical Reports Server (NTRS)

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.

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

1994-01-01

235

Mounting apparatus for a nozzle guide vane assembly  

DOEpatents

The present invention provides a ceramic nozzle guide assembly with an apparatus for mounting it to a metal nozzle case that includes an intermediate ceramic mounting ring. The mounting ring includes a plurality of projections that are received within a plurality of receptacles formed in the nozzle case. The projections of the mounting ring are secured within the receptacles by a ceramic retainer that allows contact between the two components only along arcuate surfaces thus eliminating sliding contact between the components. 8 figs.

Boyd, G.L.; Shaffer, J.E.

1995-09-12

236

Double-cantilever mount for angle-resolving particle detectors  

NASA Astrophysics Data System (ADS)

A double cantilever detector mount, constructed from aluminum, was designed to support an angle-resolving particle detector mounted on a rotary table. The mount allows precise and accurate alignment of the detector's field of view in the Cartesian x, y, and z plane, and allows precise control of the azimuthal angle of the detector. The mount is simple to adjust, provides high precision and stability, and can be used in any situation where precise and accurate detector alignment is required.

Waterhouse, D. K.; Devlin, J. K.; Williams, J. F.

2003-04-01

237

Integral Flexure Mounts for Metal Mirrors for Cryogenic Use  

NASA Technical Reports Server (NTRS)

Semi-kinematic, six-degree-of-freedom flexure mounts have been incorporated as integral parts of metal mirrors designed to be used under cryogenic conditions as parts of an astronomical instrument. The design of the mirrors and their integral flexure mounts can also be adapted to other instruments and other operating temperatures. In comparison with prior kinematic cryogenic mirror mounts, the present mounts are more compact and can be fabricated easily using Ram-EDM (electrical discharge machining) process

Zewari, S. Wahid; Hylan, Jason E.; Irish, Sandra M.; Ohl, Raymond G.; Conkey, Shelly B.

2006-01-01

238

Design Optimization of Marine Engine-Mount System  

Microsoft Academic Search

Design optimization of marine engine-mount system for vibration control is presented in this paper. The engine is modelled as a rigid body with supports connected to a rigid floor. The mounts are modelled as three-dimensional isolators with hysteresis damping. The objective is to select the stiffness coefficient and orientations of individual mount in order to minimize the vertical force transmitted

J. S. Tao; G. R. Liu; K. Y. Lam

2000-01-01

239

DESIGN OPTIMIZATION OF MARINE ENGINE-MOUNT SYSTEM  

Microsoft Academic Search

Design optimization of marine engine–mount system for vibration control is presented in this paper. The engine is modelled as a rigid body with supports connected to a rigid floor. The mounts are modelled as three-dimensional isolators with hysteresis damping. The objective is to select the stiffness coefficient and orientations of individual mount in order to minimize the vertical force transmitted

J. S. TAO; G. R. LIU; K. Y. LAM

2000-01-01

240

Periodic Mounts to Isolate the Vibrations of Automotive Vehicle Engine  

Microsoft Academic Search

In this paper, a new class of periodic mounts for isolating the vibration transmission from vehicle engine to the car body and seats is presented. Periodic mounts exhibit unique dynamic characteristics that make them act as mechanical filters for wave propagation. As a result, waves can propagate along the periodic mounts only within specific frequency bands called the \\

Saeed Asiri; A. A. N. Aljawi

2006-01-01

241

Scanned Laser Displays for Head Mounted Displays Douglas E. Holmgren  

E-print Network

1 Scanned Laser Displays for Head Mounted Displays Douglas E. Holmgren Department of Physics, and physical size are strongly coupled properties of these technologies. For head-mounted display applications. Introduction The recent interest in incorporating display devices into Head-Mounted displays (HMDs) imposes new

North Carolina at Chapel Hill, University of

242

Darstellung physikalischer Objekte in Immersiven Head-Mounted Display Umgebungen  

E-print Network

Darstellung physikalischer Objekte in Immersiven Head-Mounted Display Umgebungen Annika Busch: Head-Mounted Displays (HMDs) isolieren in der Regel den Benutzer von visuellen Eindrücken der realen Jahre später wurden die ersten Head-Mounted Displays (HMDs) präsentiert, mit de- nen es möglich war, dem

Hinrichs, Klaus

243

75 FR 1285 - Vehicle-Mounted Earth Stations (VMES)  

Federal Register 2010, 2011, 2012, 2013

...07-101; FCC 09-64] Vehicle-Mounted Earth Stations (VMES) AGENCY: Federal Communications...to Govern the Use of Vehicle-Mounted Earth Stations in Certain Frequency Bands Allocated...and Service Rules for Vehicle-Mounted Earth Stations (VMES). Form Number: Not...

2010-01-11

244

30 Cool Facts about Mount St. Helens  

USGS Publications Warehouse

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

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

2010-01-01

245

Grid-connected polymer solar panels: initial considerations of cost, lifetime, and practicality.  

PubMed

Large solar panels were constructed from polymer solar cell modules prepared using full roll-to-roll (R2R) manufacture based on the previously published ProcessOne. The individual flexible polymer solar modules comprising multiple serially connected single cell stripes were joined electrically and laminated between a 4 mm tempered glass window and black Tetlar foil using two sheets of 0.5 mm thick ethylene vinyl acetate (EVA). The panels produced up to 8 W with solar irradiance of ~960 Wm?², and had outer dimensions of 1 m x 1.7 m with active areas up to 9180 cm². Panels were mounted on a tracking station and their output was grid connected between testing. Several generations of polymer solar cells and panel constructions were tested in this context to optimize the production of polymer solar panels. Cells lacking a R2R barrier layer were found to degrade due to diffusion of oxygen after less than a month, while R2R encapsulated cells showed around 50% degradation after 6 months but suffered from poor performance due to de-lamination during panel production. A third generation of panels with various barrier layers was produced to optimize the choice of barrier foil and it was found that the inclusion of a thin protective foil between the cell and the barrier foil is critical. The findings provide a preliminary foundation for the production and optimization of large-area polymer solar panels and also enabled a cost analysis of solar panels based on polymer solar cells. PMID:21165057

Medford, Andrew J; Lilliedal, Mathilde R; Jørgensen, Mikkel; Aarø, Dennis; Pakalski, Heinz; Fyenbo, Jan; Krebs, Frederik C

2010-09-13

246

ATST telescope mount: telescope of machine tool  

NASA Astrophysics Data System (ADS)

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.

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

2012-09-01

247

Mount St. Helens Volcano, WA, USA  

NASA Technical Reports Server (NTRS)

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.

1992-01-01

248

Design concepts for the EST mount  

NASA Astrophysics Data System (ADS)

The EST has unique an optical layout, with an on-axis Gregorian tube system and the altitude axis behind the M1 mirror unit - a great challenge for the mount designer in regard of balancing. Three different structural design concepts and various alternatives for the bearing and drive systems were investigated. Hydrostatic bearings with direct drives are compared with roller bearings and geared drives. The influence of available bearing and drive technology were investigated by FE calculations, dynamic analysis and end-to-end simulations. The finally recommended design concept is based on large-diameter segmented roller bearings and so-called pinion motors in both axes.

Kärcher, Hans J.; Süss, Martin; Fischer, David

2012-09-01

249

High Speed Rotor Head Mounted Instrumentation System  

NASA Technical Reports Server (NTRS)

NASA Ames Research Center has been investigating the air flow of a rotor blade on a UH-60 Blackhawk helicopter in-flight. This paper will address the hardware problems and solutions used to design and fabricate an instrumentation system on top of a UH-60 main rotor head. The instrumentation system consisted of 10 data systems operating in parallel and collected data from 370 sensors that are mounted in four rotor blades and on the rotating rotor head. The data was recorded on board the aircraft and simultaneously down linked to the ground station at 7.5 MHz.

Hee, Leonard; Reynolds, R. S. (Technical Monitor)

1997-01-01

250

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.

251

Application of a Broadband Active Vibration Control System to a Helicopter Trim Panel  

NASA Technical Reports Server (NTRS)

This paper discusses testing of a broadband active vibration control concept on an interior trim panel in a helicopter cabin mockup located at ONERA's Centre de Toulouse. The control system consisted of twelve diamond-shaped piezoelectric actuators distributed around a 1.2m x 1.2m trim panel. Accelerometers were mounted at the four vertices of each diamond. The aspect ratio of the diamond was based on the dielectric constants of the piezoelectric material in order to create an actuator-sensor pair that was collocated over a broad frequency range. This allowed robust control to be implemented using simple, low power analog electronics. Initial testing on a thick acrylic window demonstrated the capability of the controller, but actuator performance was less satisfactory when mounted on a composite sandwich trim panel. This may have been due to the orthotropic nature of the trim panel, or due to its much higher stiffness relative to the acrylic window. Insights gained from a finite element study of the actuator-sensor-structural system are discussed.

Cabell, Randolph H.; Schiller, Noah H.; Simon, Frank

2013-01-01

252

Side-mounted monorail transportation system  

SciTech Connect

A monorail transit system is described comprising: a beam adapted to be supported on a ground-supported foundation, the beam having two opposite sides, at least one of which has respective truck means provided thereon; a transit car body; at least one transit car truck and a transit car guide means for each transit car body; each transit car truck and each transit car guide means comprising a frame having first wheel means mounted thereon for rotation and disposed in rolling engagement with the track means for providing vertical support, and second and third wheel means mounted thereon for rotation and disposed in rolling engagement with the track means for providing horizontal support; each transit car truck and the transit car guide means further including an arm based on the respective the frame and arching upwardly and outwardly therefrom to an upper outer end at which a respective first securement means is provided; each transit car truck and transit car guide means for each car body being spaced from one another longitudinally of the respective track means.

Owen, W.E.

1987-09-01

253

Helmet-mounted choroidal laser Doppler flowmeter  

NASA Astrophysics Data System (ADS)

A compact laser Doppler flowmeter (35x80x210mm3) for the measurement of subfoveal choroidal blood flow parameters (ChBF) was mounted on a helmet. This device allows the measurement of ChBF during dynamic exercises or in supine position, without the need for pupil dilatation. Its optical system is based on a Schlieren arrangement by which the surface of light collection and that of the illumination are spatially separated by an obscuration. The laser probing beam ((lambda) equals 790 nm, 100 (mu) W at the cornea) is focused at the fovea by having the tested subject look directly at the beam. Computer analysis of the photocurrent produced by the scattered light provides a relative measure of the mean blood velocity, number and flux of the red blood cells in the choriocapillaris. Measurements were performed to assess the reliability of the flow parameters measurements in normal volunteers: reproducibility and sensibility when subjects are sitting or standing; measurement of changes in ChBF in the case of isometric and dynamic exercises. Results demonstrate that this new helmet-mounted device provides data comparable to the conventional device. It allows for the first time, however, the continuous measurement of choroidal hemodynamics in humans during various types of exercises.

Geiser, Martial H.; Moret, Fabrice; Riva, Charles E.

2001-06-01

254

Low Temperature Effects: Surface Mount Capacitors  

SciTech Connect

The low signal to noise ratio produced by the VLPC (Visible Light Photon Counter) chip in the detection of a single photon necessitates the use of a filtering capacitor. Maximum performance of the filtering capabilities dictate the placement of the capacitor be as close to the VLPC chip as possible. However, the chip operates at extremely low temperatures (7K). In addition, available space within the VLPC cassette is limited. Therefore it is desired to find a capacitor which provides good temperature stability at cryogenic temperatures within a minimal space (e.g. surface mounted). This engineering note presents the results from a test of the effect of low temperature on surface mounted capacitors. Preliminary testing suggested that capacitors of the tantalum type would provide the best te mperature stability at cryogenic temperatures, therefore two different tantalum capacitors were tested. A ceramic capacitor was also included in the results as a comparison, even though preliminary results suggested the ceramic type would not provide sufficient temperature stability.

Clark, D.; /Fermilab

1992-08-17

255

Generalized SCIDAR Measurements at Mount Graham  

NASA Astrophysics Data System (ADS)

We present the results of optical turbulence measurements conducted with a Generalized SCIDAR (scintillation detection and ranging) at Mount Graham during 16 nights in 2004 and 2005 at the Vatican Advanced Technology Telescope. The principle of the data reduction process is shown, as is the validation of the obtained results. From the measured C2N and wind speed profiles, the astroclimatic parameters, such as seeing ?0, isoplanatic angle ?0, wave-front coherence time ?0, and isopistonic angle ?P, are calculated, and their seasonal variation is studied. With subtraction of the dome seeing, we obtained median values for ?0 (0.67"), ?0 (2.7"), ?0 (3.6 ms), and ?P (3.3") that indicate that the astronomical seeing at Mount Graham is comparable to the best sites in the world. The seasonal variation of the vertical structure of the C2N profiles is studied, and the contribution by the ground-layer turbulence is analyzed. Furthermore, typical discretized C2N profiles that are suitable for numerical simulations are determined.

Egner, S. E.; Masciadri, E.; McKenna, D.

2007-06-01

256

Athermal mounting of optics in metallic housings  

NASA Astrophysics Data System (ADS)

This paper illustrates an athermal mounting for a Zinc Selenide (ZnSe) optic in an AlBeMet housing for use at cryogenic temperatures. The GOES-R Advanced Baseline Imager (ABI) instrument beamsplitter utilizes this design and the difficulty is the significant delta in the coefficient of thermal expansion (CTE) between the housing and the optic. The high discrepancy in CTE is exacerbated by a large thermal range from an ambient assembly to cryogenic operational temperature. The assembly utilizes CTE matched clips bonded to the optic using a well controlled bondline. The clips are attached to an optimized spacer of a high CTE material that is used to reduce the CTE mismatch. The spacers are coupled to a four flexure design that is symmetric in both axes. The net effect reduces the apparent CTE between the optic and the housing in a space constrained mounting. The flexures allow the final small amount of expansion room that the assembly requires as it goes over a large temperature swing. This design was qualified through extensive thermal cycling and vibration testing, and exhibited performance acceptable for production.

Leahy, Zachary N.; Magner, Andrew J.

2013-09-01

257

Barge mounted combustion turbine power plant design  

SciTech Connect

This paper presents the design considerations for installation of industrial combustion turbine power plants mounted on floating barges. Westinghouse Electric Corporation and Hudson Engineering Corporation (a McDermott Company) have initiated work on several barge-mounted power plant configurations with the Westinghouse 251B11/12 combustion turbine in simple cycle mode as the basis and utilizing a variety of fuels, including natural gas, naphtha, and distillate No. 2. The development of an operable installation required the integration of the 251B11/12 (one or two) with an isolation foundation frame, the BOP facilities, step-up transformers and switchyard capabilities onto a barge hull with the provisions for maintainability. Consideration of these requirements has resulted in two basic designs (one or two units on a barge) with the flexibility to meet several power requirements, differing fuels, and a range of onshore support facilities and mooring conditions, resulting in a power production facility that can be self-supportive in a variety of environments.

Kincaid, L.B. [Westinghouse Electric Corp., Orlando, FL (United States); Connolly, J.P. [Hudson Engineering Corp., Houston, TX (United States)

1995-09-01

258

Anaglyph with Landsat Overlay, Mount Meru, Tanzania  

NASA Technical Reports Server (NTRS)

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)

2002-01-01

259

Construction of radiation hybrid panels.  

PubMed

Whole-genome radiation hybrid (RH) mapping has proven to be a powerful tool for mapping genes and comparing genome architecture. We describe a protocol for constructing RH panels by rescuing irradiated fibroblast donor cells of any mammalian species by polyethylene glycol fusion to a thymidine kinase-deficient hamster cell line. Characterization and expansion of a panel of 90-100 cell lines can be used to map virtually any PCR-based marker that can be distinguished from the recipient hamster genome. The described procedure has been used successfully to create RH panels from diverse mammalian species such as macaques, elephants, alpacas, and armadillos, and may be applicable to nonmammalian vertebrates as well. PMID:18629660

Page, John E; Murphy, William J

2008-01-01

260

Fixture for assembling solar panels  

NASA Technical Reports Server (NTRS)

Vacuum fixture attaches array of silicon solar cells to mounting plate made of clear glass which holds and protects cells. Glass plate transmits, rather than absorbs, solar energy thus cooling cells for efficient operation. Device therefore reduces handling of cells and interconnecting conductors to one operation.

Dillard, P. A.; Fritz, W. M.

1979-01-01

261

Heavy periodane.  

PubMed

The potential energy surface of the hypothetical NaMgAlSiPSCl system (heavy periodane) is exhaustively analyzed via the gradient embedded genetic algorithm (GEGA) in combination with density functional theory (DFT) computations. The electronegativity differences among the elements in both the second and third rows of the periodic table indicate that low-energy heavy periodane structures are obtained when highly electronegative and electropositive elements are bound together, but the global minimum of the heavy periodane system is completely different to its second-row analog (LiBeBCNOF). PMID:22903586

Azpiroz, Jon M; Moreno, Diego; Ramirez-Manzanares, Alonso; Ugalde, Jesus M; Mendez-Rojas, Miguel Angel; Merino, Gabriel

2013-05-01

262

Program Helps Design Composite Panels  

NASA Technical Reports Server (NTRS)

Panel Analysis and Sizing Code (PASCO) computer program developed for buckling and vibration analysis and sizing of prismatic structures having arbitrary cross sections. Intended for analyzing and sizing stiffened panels made of laminated orthotropic materials, and of particular value in analyzing and sizing filamentary composite structures. Macintosh version of PASCO includes interactive, graphic preprocessor called MACPASCO. Main objective to make use of PASCO faster, simpler, and less error-prone. Includes graphical user interface (GUI). PASCO written in FORTRAN IV. MACPASCO written in Macintosh Programmers Workbench 3.0, MPW Pascal 3.0, and MacAPP 2.0.

Lucas, Stephen H.; Davis, Randall C.

1994-01-01

263

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

ERIC Educational Resources Information Center

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…

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

2012-01-01

264

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

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

K. Moore; G. Holdsworth

2006-01-01

265

Fire and forest history at Mount Rushmore.  

PubMed

Mount Rushmore National Memorial in the Black Hills of South Dakota is known worldwide for its massive sculpture of four of the United States' most respected presidents. The Memorial landscape also is covered by extensive ponderosa pine (Pinus ponderosa) forest that has not burned in over a century. We compiled dendroecological and forest structural data from 29 plots across the 517-ha Memorial and used fire behavior modeling to reconstruct the historical fire regime and forest structure and compare them to current conditions. The historical fire regime is best characterized as one of low-severity surface fires with occasional (> 100 years) patches (< 100 ha) of passive crown fire. We estimate that only approximately 3.3% of the landscape burned as crown fire during 22 landscape fire years (recorded at > or = 25% of plots) between 1529 and 1893. The last landscape fire was in 1893. Mean fire intervals before 1893 varied depending on spatial scale, from 34 years based on scar-to-scar intervals on individual trees to 16 years between landscape fire years. Modal fire intervals were 11-15 years and did not vary with scale. Fire rotation (the time to burn an area the size of the study area) was estimated to be 30 years for surface fire and 800+ years for crown fire. The current forest is denser and contains more small trees, fewer large trees, lower canopy base heights, and greater canopy bulk density than a reconstructed historical (1870) forest. Fire behavior modeling using the NEXUS program suggests that surface fires would have dominated fire behavior in the 1870 forest during both moderate and severe weather conditions, while crown fire would dominate in the current forest especially under severe weather. Changes in the fire regime and forest structure at Mount Rushmore parallel those seen in ponderosa pine forests from the southwestern United States. Shifts from historical to current forest structure and the increased likelihood of crown fire justify the need for forest restoration before a catastrophic wildfire occurs and adversely impacts the ecological and aesthetic setting of the Mount Rushmore sculpture. PMID:19263892

Brown, Peter M; Wienk, Cody L; Symstad, Amy J

2008-12-01

266

Heavy Flavors  

NASA Astrophysics Data System (ADS)

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.

Cox, B.; Soni, A.

267

Accurate Telescope Mount Positioning with MEMS Accelerometers  

NASA Astrophysics Data System (ADS)

This paper describes the advantages and challenges of applying microelectromechanical accelerometer systems (MEMS accelerometers) in order to attain precise, accurate, and stateless positioning of telescope mounts. This provides a completely independent method from other forms of electronic, optical, mechanical or magnetic feedback or real-time astrometry. Our goal is to reach the subarcminute range which is considerably smaller than the field-of-view of conventional imaging telescope systems. Here we present how this subarcminute accuracy can be achieved with very cheap MEMS sensors and we also detail how our procedures can be extended in order to attain even finer measurements. In addition, our paper discusses how can a complete system design be implemented in order to be a part of a telescope control system.

Mészáros, L.; Jaskó, A.; Pál, A.; Csépány, G.

2014-09-01

268

Atmospheric waves from Mount St. Helens  

NASA Astrophysics Data System (ADS)

The famous volcanic eruption of Mount St. Helens on May 18, 1980, generated atmospheric and magnetic waves that encircled the earth. Ritsema [1980] reports atmospheric pressure waves (or gravity waves), recorded by seismographs and barographs, at De Bilt in Holland. Stimulated by his report, I searched our own seismograph records with positive results (Table 1). The instruments used are the Press-Ewing long-period vertical-component seismographs (seismometer period, 15 s; galvanometer period, 90-100 s). Clear records of the direct air wave (A1) were obtained at all three stations (Kiruna, Umeå, Uppsala), while the antipodal wave (A2) was recorded less clearly and only at one station (Uppsala). In all cases, the initial motion is down on the records, which corresponds to an upward motion of the pendulum.

Båth, Markus

269

Article mounting and position adjustment stage  

DOEpatents

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.

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

1988-05-10

270

Article mounting and position adjustment stage  

DOEpatents

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.

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

1988-01-01

271

Helmet mounted display flight symbology research  

NASA Technical Reports Server (NTRS)

Screen/head stabilized MIL-STD 1295 helmet mounted display (HMD) flight symbology as integrated on the Apache helicopter was compared to world referenced/stabilized flight symbology. Simulation test results indicate that pilots perform significantly better using world-stabilized conformal attitude symbology. They were accurate to an average of 1/2 degree at estimating terrain relief and aerial target locations. World stabilized conformal symbology was preferred while performing contour flight tasks. They reported that the use of climb-dive-marker during contour flight greatly reduced pilot work load under conditions tested. Cyclic input errors occurred when using both 1295 hover symbology and test symbology indicating that a better approach for depicting hover symbology is warranted. The magnitude of cyclic input and spatial estimation errors increased as the off-axis viewing angle became larger.

Haworth, Loran A.; Seery, Ronald E.

1992-01-01

272

Mount Kilimanjaros Vanishing Snow Cap (WMS)  

NSDL National Science Digital Library

During the last few decades, the permanent snow and ice ony the summit of Mount Kilimanjaro has almost completely disappeared, at the rate of about a foot and a half of glacial ice lost per year. This loss is primarily due to increasing average annual temperatures in the region, and scientists are speculating that the glaciers could be completely gone from Kilimanjaro by the year 2015. This ice cap formed more that 11,000 years ago, and 80% of the ice fields have been lost in only the last century. The shrinkage is illustrated here in Landsat images from 1993, 2000, and 2002, with the 1993 image showing a significant ice cap and the more recent images showing only small glaciers and snow regions remaining.

Williams, James; Mitchell, Horace; Newcombe, Marte; Williams, Darrel

2005-03-02

273

Reusable vibration resistant integrated circuit mounting socket  

SciTech Connect

This invention discloses a novel form of socket for integrated circuits to be mounted on printed circuit boards. The socket uses a novel contact which is fabricated out of a bimetallic strip with a shape which makes the end of the strip move laterally as temperature changes. The end of the strip forms a barb which digs into an integrated circuit lead at normal temperatures and hold it firmly in the contact, preventing loosening and open circuits from vibration. By cooling the contact containing the bimetallic strip the barb end can be made to release so that the integrated circuit lead can be removed from the socket without damage either to the lead or to the socket components.

Evans, C.N.

1993-12-31

274

Crater Lake, Oregon: Mount Mazama, Oregon  

NSDL National Science Digital Library

This resource about Mount Mazama, a volcano in the Cascade Range, covers its geographic setting, and geologic and eruptive history. The site also offers information about Crater Lake, a caldera that was created by the largest known eruption from any Cascade Range volcano. The 8 x 10 kilometer caldera lies in the remains of this Pleistocene stratovolcano cluster covering 400 square kilometers in the southern Oregon Cascades. Prior to its climactic eruption, its southern and southeastern flanks were deeply incised by glacial valleys that today form U-shaped notches in the caldera wall. Links labeled 'Special Items of Interest' include 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.

275

The Advanced Technology Solar Telescope mount assembly  

NASA Astrophysics Data System (ADS)

When constructed on the summit of Haleakala on the island of Maui, Hawaii, the Advanced Technology Solar Telescope (ATST) will be the world's largest solar telescope. The ATST is a unique design that utilizes a state-of-the-art off-axis Gregorian optical layout with five reflecting mirrors delivering light to a Nasmyth instrument rotator, and nine reflecting mirrors delivering light to an instrument suite located on a large diameter rotating coude lab. The design of the telescope mount structure, which supports and positions the mirrors and scientific instruments, has presented noteworthy challenges to the ATST engineering staff. Several novel design solutions, as well as adaptations of existing telescope technologies to the ATST application, are presented in this paper. Also shown are plans for the control system and drives of the structure.

Warner, Mark; Cho, Myung; Goodrich, Bret; Hansen, Eric; Hubbard, Rob; Lee, Joon Pyo; Wagner, Jeremy

2006-06-01

276

Rack assembly for mounting solar modules  

DOEpatents

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.

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

2010-12-28

277

Rack assembly for mounting solar modules  

DOEpatents

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.

Plaisted, Joshua Reed; West, Brian

2012-09-04

278

Rack assembly for mounting solar modules  

SciTech Connect

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.

Plaisted, Joshua Reed; West, Brian

2014-06-10

279

Reusable vibration resistant integrated circuit mounting socket  

DOEpatents

This invention discloses a novel form of socket for integrated circuits to be mounted on printed circuit boards. The socket uses a novel contact which is fabricated out of a bimetallic strip with a shape which makes the end of the strip move laterally as temperature changes. The end of the strip forms a barb which digs into an integrated circuit lead at normal temperatures and holds it firmly in the contact, preventing loosening and open circuits from vibration. By cooling the contact containing the bimetallic strip the barb end can be made to release so that the integrated circuit lead can be removed from the socket without damage either to the lead or to the socket components.

Evans, Craig N. (Irwin, PA)

1995-01-01

280

Photovoltaic array mounting apparatus, systems, and methods  

DOEpatents

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.

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

2014-12-02

281

Mount Hood Wilderness and adjacent areas, Oregon  

SciTech Connect

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.

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

1984-01-01

282

What Is Effectiveness? Panel Discussion.  

ERIC Educational Resources Information Center

Two papers are presented from a panel discussion moderated by Naomi Zigmond, who introduces the papers with a note on definitions and measures of intervention effectiveness. "Some Thoughts on Effective Intervention for Handicapped Preschoolers," by Phillip Strain, notes that special education researchers attempt to be efficient, economical,…

Zigmond, Naomi

283

Peg supported thermal insulation panel  

DOEpatents

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.

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

1985-01-01

284

Peg supported thermal insulation panel  

DOEpatents

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.

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

1985-04-30

285

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...

286

ASIST 2003: Part II: Panels.  

ERIC Educational Resources Information Center

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;…

Proceedings of the ASIST Annual Meeting, 2003

2003-01-01

287

TECHNICAL ASSESSMENT PANEL For Reference  

E-print Network

of Representatives, U.S.A. , . .: #12;REPORT of the TECHNICAL ASSESSMENT PANEL for the 300 foot RADIO TELESCOPE at GREEN BANK, WV SUMMARY The 300 foot Radio Telescope at Green Bank, West Virginia which collapsed under The 300 foot diameter Radio Telescope at Green Bank was designed and built over a period of two years

Groppi, Christopher

288

Hydrothermal processes at Mount Rainier, Washington  

SciTech Connect

Field studies and thermal-infrared mapping at Mount Rainier indicate areas of active hydrothermal alteration where excess surface heat flux is about 9 megawatts. Three representative settings include: (1) An extensive area (greater than 12,000 m/sup 2/) of heated ground and slightly acidic boiling-point fumaroles at 76-82/sup 0/C at East and West Craters on the volcano's summit; (2) A small area (less than 500 m/sup 2/) of heated ground and sub-boiling-point fumaroles at 55-60/sup 0/C on the upper flank at Disappointment Cleaver, and other probably similar areas at Willis Wall, Sunset Amphitheater, and the South Tahoma and Kautz headwalls; (3) Sulfate and carbon dioxide enriched thermal springs at 9-24/sup 0/C on the lower flank of the volcano in valley walls beside the Winthrop and Paradise Glaciers. In addition, chloride- and carbon dioxide-enriched thermal springs issue from thin sediments that overlie Tertiary rocks at, or somewhat beyond, the base of the volcanic edifice in valley bottoms of the Nisqually and Ohanapecosh Rivers where maximum spring temperatures are 19-25/sup 0/C, respectively, and where extensive travertine deposits have developed. The heat flow, distribution of thermal activity, and nature of alteration products indicate that a narrow, central hydrothermal system exists within Mount Rainier forming steam-heated snowmelt at the summit craters and localized leakage of steam-heated fluids within 2 kilometers of the summit. The lateral extent of the hydrothermal system is limited in that only sparse, neutral sulfate-enriched thermal water issues from the lower flank of the cone. Simulations of geochemical mass transfer suggest that the thermal springs may be derived from an acid sulfate-chloride parent fluid which has been neutralized by reaction with andesite and highly diluted with shallow ground water.

Frank, D.G.

1985-01-01

289

Camera Mount for a Head-Up Display  

NASA Technical Reports Server (NTRS)

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.

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

2007-01-01

290

76 FR 50499 - Arts Advisory Panel  

Federal Register 2010, 2011, 2012, 2013

...THE ARTS AND THE HUMANITIES National Endowment for the Arts Arts Advisory Panel Pursuant...the Office of AccessAbility, National Endowment for the Arts, 1100 Pennsylvania Avenue...Guidelines & Panel Operations, National Endowment for the Arts, Washington, DC...

2011-08-15

291

75 FR 56146 - Arts Advisory Panel; Meetings  

Federal Register 2010, 2011, 2012, 2013

...THE ARTS AND THE HUMANITIES National Endowment for the Arts Arts Advisory Panel; Meetings...the Office of AccessAbility, National Endowment for the Arts, 1100 Pennsylvania Avenue...Guidelines & Panel Operations, National Endowment for the Arts, Washington, DC...

2010-09-15

292

76 FR 63664 - Arts Advisory Panel  

Federal Register 2010, 2011, 2012, 2013

...THE ARTS AND THE HUMANITIES National Endowment for the Arts Arts Advisory Panel Pursuant...the Office of AccessAbility, National Endowment for the Arts, 1100 Pennsylvania Avenue...Guidelines & Panel Operations, National Endowment for the Arts, Washington, DC...

2011-10-13

293

75 FR 27825 - Arts Advisory Panel  

Federal Register 2010, 2011, 2012, 2013

...THE ARTS AND THE HUMANITIES National Endowment for the Arts Arts Advisory Panel Pursuant...the Office of AccessAbility, National Endowment for the Arts, 1100 Pennsylvania Avenue...Guidelines & Panel Operations, National Endowment for the Arts, Washington, DC...

2010-05-18

294

Retaining Ring Fastener for Solar Panels  

NASA Technical Reports Server (NTRS)

Simple articulating linkage secures solar panels into supporting framework. Five element linkage collapses into W-shape for easy placement into framework, then expands to form rectangle of same dimensions as those of panel.

Wilson, A. H.

1983-01-01

295

21 CFR 660.3 - Reference panel.  

...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...

2014-04-01

296

21 CFR 660.3 - Reference panel.  

Code of Federal Regulations, 2011 CFR

...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...

2011-04-01

297

21 CFR 660.3 - Reference panel.  

Code of Federal Regulations, 2010 CFR

...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...

2010-04-01

298

21 CFR 660.3 - Reference panel.  

Code of Federal Regulations, 2012 CFR

...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...

2012-04-01

299

21 CFR 660.3 - Reference panel.  

Code of Federal Regulations, 2013 CFR

...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...

2013-04-01

300

30 CFR 77.310 - Control panels.  

Code of Federal Regulations, 2013 CFR

...AREAS OF UNDERGROUND COAL MINES Thermal Dryers § 77.310 Control panels. (a) All thermal dryer system control panels constructed after...to control the operation of each thermal dryer system shall be posted at or near the...

2013-07-01

301

30 CFR 77.310 - Control panels.  

Code of Federal Regulations, 2012 CFR

...AREAS OF UNDERGROUND COAL MINES Thermal Dryers § 77.310 Control panels. (a) All thermal dryer system control panels constructed after...to control the operation of each thermal dryer system shall be posted at or near the...

2012-07-01

302

30 CFR 77.310 - Control panels.  

...AREAS OF UNDERGROUND COAL MINES Thermal Dryers § 77.310 Control panels. (a) All thermal dryer system control panels constructed after...to control the operation of each thermal dryer system shall be posted at or near the...

2014-07-01

303

30 CFR 77.310 - Control panels.  

Code of Federal Regulations, 2011 CFR

...AREAS OF UNDERGROUND COAL MINES Thermal Dryers § 77.310 Control panels. (a) All thermal dryer system control panels constructed after...to control the operation of each thermal dryer system shall be posted at or near the...

2011-07-01

304

Static Performance of a Wing-Mounted Thrust Reverser Concept  

NASA Technical Reports Server (NTRS)

An experimental investigation was conducted in the Jet-Exit Test Facility at NASA Langley Research Center to study the static aerodynamic performance of a wing-mounted thrust reverser concept applicable to subsonic transport aircraft. This innovative engine powered thrust reverser system is designed to utilize wing-mounted flow deflectors to produce aircraft deceleration forces. Testing was conducted using a 7.9%-scale exhaust system model with a fan-to-core bypass ratio of approximately 9.0, a supercritical left-hand wing section attached via a pylon, and wing-mounted flow deflectors attached to the wing section. Geometric variations of key design parameters investigated for the wing-mounted thrust reverser concept included flow deflector angle and chord length, deflector edge fences, and the yaw mount angle of the deflector system (normal to the engine centerline or parallel to the wing trailing edge). All tests were conducted with no external flow and high pressure air was used to simulate core and fan engine exhaust flows. Test results indicate that the wing-mounted thrust reverser concept can achieve overall thrust reverser effectiveness levels competitive with (parallel mount), or better than (normal mount) a conventional cascade thrust reverser system. By removing the thrust reverser system from the nacelle, the wing-mounted concept offers the nacelle designer more options for improving nacelle aero dynamics and propulsion-airframe integration, simplifying nacelle structural designs, reducing nacelle weight, and improving engine maintenance access.

Asbury, Scott C.; Yetter, Jeffrey A.

1998-01-01

305

Convenient mounting method for electrical measurements of thin samples  

NASA Technical Reports Server (NTRS)

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.

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

1986-01-01

306

USGS: Mount St. Helens, Washington Eruption 2004, 2005  

NSDL National Science Digital Library

"After 18 years of relative quiescence, Mount St. Helens volcano recaptured the world's attention when it showed signs of reawakening in September 2004." This USGS website offers online factsheets on Mount St. Helens activity from September 2004 through March 2005. Visitors can discover the height of the new lava dome, new technology for monitoring eruptions, and the possible hazards related to Mount St. Helens' activity. The website supplies fascinating topographic images of the changes in Mount St. Helens crater, photos of its new growing lava dome, and more.

307

TIM-3 Busy Signals Flow Front Panel  

E-print Network

TIM-3 Busy Signals Flow FPGA2 Front Panel Busy Input (NIM) LK6 PL41 LK4 LK1 PL167 TIMOUTEN Front (NIM) Front Panel IDC TIM Busy (ECL) Front-panel RODBusy LED Front-panel ROD-Busy Output (NIMRunMode EnExtRodBusy Burst Busy SARBdisable NIMEXTBUSY enRBbusy enVBbusy enXRBbusy TIM_TRIG TTC_L1A L1A XRB

University College London

308

Lightweight composites for modular panelized construction  

NASA Astrophysics Data System (ADS)

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).

Vaidya, Amol S.

309

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

NASA Technical Reports Server (NTRS)

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.

1997-01-01

310

TESPI: Thermal Electric Solar Panel Integration  

Microsoft Academic Search

A photovoltaic panel with a heat extraction system is studied. The solution we suggest consists in superimposing a water layer on the PV panel: the water layer absorbs the infrared radiation leaving the visible part almost unaffected. This allows a good PV efficiency and heat production. This particular setup is called Thermal Electric Solar Panel Integration (TESPI) and it is

M. Rosa-Clot; P. Rosa-Clot; G. M. Tina

2011-01-01

311

ROBOTIC DEVICE FOR CLEANING PHOTOVOLTAIC PANEL ARRAYS  

E-print Network

. The main method for harnessing solar power is with arrays made up of photovoltaic (PV) panels. Accumulation of dust and debris on even one panel in an array reduces their efficiency in energy generation for the PV cells to operate at maximum efficiency without energy loss, the panels' surfaces need to be clean

Mavroidis, Constantinos

312

The CRRES high efficiency solar panel  

Microsoft Academic Search

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

Terry M. Trumble

1991-01-01

313

Submerged photovoltaic solar panel: SP2  

Microsoft Academic Search

The behavior of a photovoltaic (PV) panel submerged in water is studied. A sizeable increase of electric power output is found for shallow water. Experiments have been carried out for single crystalline silicon panels. Results are discussed and the increase in efficiency is investigated and understood. Operating problems are analyzed and the advantages of using underwater solar panels are pointed

M. Rosa-Clot; P. Rosa-Clot; G. M. Tina; P. F. Scandura

2010-01-01

314

Thermic diode solar panels - A brief summary  

Microsoft Academic Search

Thermic diode solar panels for use in heating buildings are described. Each panel combines all the necessary elements of a complete solar energy system (collector, controls, storage, heat exchangers and ducting) into a four by eight foot module. No moving parts or external power are involved. Thermic panels are also compared to other solar heating systems, such as air heating

S. Buckley

1976-01-01

315

UNIVERSITY APPEALS PANEL Ann Hajek `14  

E-print Network

UNIVERSITY APPEALS PANEL Ann Hajek `14 Esther Angert `14 Walter DeJong `14 Robert Seem (Geneva Decker `18 Ronald Harris-Warrick `18 Harry Kaiser `18 Shelley Feldman `18 UNIVERSITY APPEALS PANEL The University Appeals Panel was established to consider appeals of negative decisions on faculty regarding

Keinan, Alon

316

Fully Modified OLS for Heterogeneous Cointegrated Panels  

Microsoft Academic Search

This chapter uses fully modified OLS principles to develop new methods for estimating and testing hypotheses for cointegrating vectors in dynamic panels in a manner that is consistent with the degree of cross sectional heterogeneity that has been permitted in recent panel unit root and panel cointegration studies. The asymptotic properties of various estimators are compared based on pooling along

Peter Pedroni

2000-01-01

317

Geology of Mount Rainier National Park, Washington  

USGS Publications Warehouse

Mount Rainier National Park includes 378 square miles of rugged terrain on the west slope of the Cascade Mountains in central Washington. Its mast imposing topographic and geologic feature is glacier-clad Mount Rainier. This volcano, composed chiefly of flows of pyroxene andesite, was built upon alt earlier mountainous surface, carved from altered volcanic and sedimentary rocks invaded by plutonic and hypabyssal igneous rocks of great complexity. The oldest rocks in the park area are those that make up the Olmnapecosh Formation of late Eocene age. This formation is more than 10,000 feet thick, and consists almost entirely of volcanic debris. It includes some lensoid accumulations of lava and coarse mudflows, heaped around volcanic centers., but these are surrounded by vastly greater volumes of volcanic clastic rocks, in which beds of unstratified coarse tuff-breccia, about 30 feet in average thickness, alternate with thin-bedded breccias, sandstones, and siltstones composed entirely of volcanic debris. The coarser tuff-breccias were probably deposited from subaqueous volcanic mudflows generated when eruption clouds were discharged directly into water, or when subaerial ash flows and mudflows entered bodies of water. The less mobile mudflows and viscous lavas built islands surrounded by this sea of thinner bedded water-laid clastics. In compostion the lava flows and coarse lava fragments of the Ohanapecosh Formation are mostly andesite, but they include less abundant dacite, basalt, and rhyolite. The Ohanapecosh Formation was folded, regionally altered to minerals characteristic of the zeolite facies of metamorphism, uplifted, and deeply eroded before the overlying Stevens Ridge Formation of Oligocene or early Miocene age was deposited upon it. The Stevens Ridge rocks, which are about 3,000 feet in maximum total thickness, consist mainly of massive ash flows. These are now devitrified and altered, but they originally consisted of rhyodacite pumice lapilli and glass shards, which compacted and welded into thick massive units during emplacement and cooling. Subordinate water-laid clastic rocks occur t(ward the top of the formation, and thin-bedded pyroclastic layers occur between some of the ash flows. Exposures on Backbone Ridge and on Carbon River below the mouth of Cataract Creek show that in places the thick basal Stevens Ridge ash flows swept with great violence over an old erosion surface developed on rocks of the Ohanapecosh Formation. Masses of mud, tree trunks, and other surface debris were swirled upward into the base of the lowermost ash fiery, and lobes and tongues of hot ash were forced downward into. the saprolitic mud. The Stevens Ridge Formation is concordantly overlain by the Fifes Peak Formation of probable early Miocene age, which consists of lava flows, subordinate mudflows, and minor quantities of tuffaceous clastic rocks. The lavas are predominantly olivine basalt and basaltic andesite, but they include a little rhyolite. They are slightly to moderately altered: the ferromagnesian phenocrysts are generally replaced by saponite, chiprite, or carbonate ; the glass is devitrified ; and the rocks are locally permeated by veinlets of zeolite. Swarms of diabase sills and dikes are probably intrusive equivalents of the Fifes Peak lavas. The upper part of the Fifes Peak Formation has been mostly eroded from Mount Rainier National Park, but farther north, in the Cedar Lake quadrangle, it attains a thickness of more than 5,000 feet. The Fifes Peak and earlier formations were gently folded, faulted, uplifted, and eroded before the. late Miocene Tatoosh pluton worked its way upward to shallow depths and eventually broke through to the surface. The rise of the pluton was accompanied by .the injection of a complicated melange of satellitic stocks, sills, and dikes. A favored horizon for intrusion of sills was along or near the unconfo

Fiske, Richard S.; Hopson, Clifford Andrae; Waters, Aaron Clement

1963-01-01

318

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

NASA Technical Reports Server (NTRS)

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.

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

1979-01-01

319

Simple motor drive system operates heavy hinged door  

NASA Technical Reports Server (NTRS)

Motor drive system remotely operates heavy steel radiation shielding doors. The drive consists of a standard motor reducer unit which is mounted on the door. This reducer drives a sprocket which is linked by chain to a fixed sprocket of the same size on the door jamb.

Pitkin, R. G.

1966-01-01

320

Structural and Acoustic Numerical Modeling of a Curved Composite Honeycomb Panel  

NASA Technical Reports Server (NTRS)

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.

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

2001-01-01

321

Remote, mobile telemedicine: the satellite transmission of medical data from Mount Logan.  

PubMed

The purpose of this investigation was to demonstrate the potential of remote, mobile telemedicine during a four-week, high-altitude mountaineering expedition to Mount Logan, Canada's highest summit. Using a mobile satellite terminal and a laptop computer (both powered by a photovoltaic solar panel), ECG tracings and blood pressure measurements, in addition to colour images, short-segment video and audio clips were transmitted during the course of the ascent. The data were transmitted via a mobile communications satellite to a ground station in Ottawa, a distance of over 4000 km. The data were then transferred to the public switched data network and delivered to the University of Ottawa Heart Institute for analysis. Similarly, data were transmitted from the ground station to the expedition team on Mount Logan throughout the ascent. Using this technique, medical diagnosis and emergency care can be facilitated in extreme and isolated locations lacking a telecommunications infrastructure. Such technology has applications in developing countries, disaster response efforts, remote civilian and military operations, and in space operations. PMID:9218396

Otto, C; Pipe, A

1997-01-01

322

ASAP Aerospace Safety Advisory Panel  

NASA Technical Reports Server (NTRS)

This is the First Quarterly Report for the newly reconstituted Aerospace Safety Advisory Panel (ASAP). The NASA Administrator rechartered the Panel on November 18,2003, to provide an independent, vigilant, and long-term oversight of NASA's safety policies and programs well beyond Return to Flight of the Space Shuttle. The charter was revised to be consistent with the original intent of Congress in enacting the statute establishing ASAP in 1967 to focus on NASA's safety and quality systems, including industrial and systems safety, risk-management and trend analysis, and the management of these activities.The charter also was revised to provide more timely feedback to NASA by requiring quarterly rather than annual reports, and by requiring ASAP to perform special assessments with immediate feedback to NASA. ASAP was positioned to help institutionalize the safety culture of NASA in the post- Stafford-Covey Return to Flight environment.

2004-01-01

323

Effects of Adding Sewage Sludge and Urea-Phosphate Fertilizers to the Great Sippewissett Salt Marsh, Falmouth, MA on Heavy Metals and Microbial N-Cycling  

E-print Network

, Falmouth, MA on Heavy Metals and Microbial N-Cycling Susan Pincus Mount Holyoke College December 2006, microbes, nitrogen cycle, sewage sludge, urea phosphate fertilizer, heavy metals INTRODUCTION Pollution of toxic heavy metals has become an environmental global issue. In recognition of the toxicity of metals

Vallino, Joseph J.

324

Flat panel planar optic display  

SciTech Connect

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.

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

1994-11-01

325

Flat Panel Vacuum Thermal Insulation  

Microsoft Academic Search

Evacuated mats of glass fiber made up of fibers of proper size and orientation are capable of supporting a compressive mechanical loading of at least one atmosphere and yet maintain a thermal conductivity of less than 10 microcalories?cm°C sec. The use of such a glass fiber mat as a filler makes possible an evacuated flat-panel thermal insulation which is comparable

H. M. Strong; F. P. Bundy; H. P. Bovenkerk

1960-01-01

326

Emissions and Noise Pervasive Panel  

NASA Technical Reports Server (NTRS)

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.

Henderson, Brenda; Lee, Chi

2008-01-01

327

Examiner's finger-mounted fetal tissue oximetry  

NASA Astrophysics Data System (ADS)

The best way to assess fetal condition is to observe the oxygen status of the fetus (as well as to assess the condition of infants, children, and adults). Previously, several fetal oximeters have been developed; however, no instrument has been utilized in clinical practice because of the low-capturing rate of the fetal oxygen saturation. To overcome the problem, we developed a doctor's finger-mounted fetal tissue oximeter, whose sensor volume is one hundredth of the conventional one. Additionally, we prepared transparent gloves. The calculation algorithm of the hemoglobin concentration was derived from the light propagation analysis based on the transport theory. We measured neonatal and fetal oxygen saturation (StO2) with the new tissue oximeter. Neonatal StO was measured at any position of the head regardless of amount of hair. Neonatal StO was found to be around 77%. Fetal StO was detected in every position of the fetal head during labor regardless of the presence of labor pain. Fetal StO without labor pain was around 70% in the first stage of labor and around 60% in the second stage of labor. We concluded that our new concept of fetal tissue oximetry would be useful for detecting fetal StO in any condition of the fetus.

Kanayama, Naohiro; Niwayama, Masatsugu

2014-06-01

328

Helmet Mounted Display symbology integration research  

NASA Technical Reports Server (NTRS)

A five-week flight simulation investigation comparing screen/head stabilized Apache Helmet Mounted Display (HMD) flight symbology to world stabilized flight symbology is presented in this paper. Simulation test results indicate that pilots perform significantly (P is less than .05) better using world stabilized attitude symbology. They were accurate to an average of 1/2 deg at estimating terrain relief and aerial target locations. Pilots were able to take advantage of world referenced symbology due to the unique features of HMD that allow the pilot to visually use the symbology at extreme azimuth and elevation off-axis angles. Pilots preferred world stabilized symbology while performing contour flight tasks. They reported that the use of climb-dive-marker during contour flight greatly reduced pilot work load under conditions tested. A surprising number of cyclic input errors occurred when using both MIL-STD-1295 hover symbology and test symbology, indicating that a better approach for depicting hover symbology is probably warranted. The magnitude of cyclic input and spatial estimation errors increased as the off-axis viewing angle became larger.

Haworth, Loran A.; Seery, Ronald E.

1992-01-01

329

Virtual sine arm kinematic mount system  

SciTech Connect

A novel kinematic mount system for a vertical focusing mirror of the soft x-ray spectroscopy beamline at the Advanced Photon Source is described. The system contains three points in a horizontal plane. Each point consists of two horizontal linear precision stages, a spherical ball bearing, and a vertical precision stage. The horizontal linear stages are aligned orthogonally and are conjoined by a spherical ball bearing, supported by the vertical linear stage at each point. The position of each confined horizontal stage is controlled by a motorized micrometer head by spring-loading the flat tip of the micrometer head onto a tooling ball fixing on the carriage of the stage. A virtual sine arm is formed by tilting the upstream horizontal stage down and the two downstream horizontal stages up by a small angle. The fine pitch motion is achieved by adjusting the upstream stage. This supporting structure is extremely steady due to a relatively large span across the supporting points and yields extremely high resolution on the pitch motion. With a one degree tilt and a microstepping motor, the authors achieved a 0.4 nanoradian resolution on the mirror pitch motion.

Xu, Z.; Randall, K.J. [Argonne National Lab., IL (United States). Advanced Photon Source

1997-09-01

330

Nd:YAG breech mounted laser igniter  

NASA Astrophysics Data System (ADS)

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.

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

2005-09-01

331

Magnetotelluric investigations at Mount Hood, Oregon  

SciTech Connect

Magnetotelluric data, with both electric and magnetic field references for noise cancellation, were collected at accessible locations around and as close as possible to the Mount Hood andesite-dacite volcano. The purpose of the study was to identify and map conductive features and to relate them to the thermal regime of the region. Several conductors could be discerned. The shallowest, at a depth of around 500 m below the surface, was identified as a flow of heated water moving away from the summit: the deepest (--50 km) might be a melt zone in the upper mantle. Of particular interest is an elongate conductor that strikes N 10/sup 0/ W and extends from a depth of 12 km down to 22 km. Because the conductor strike is close to the trend of the chain of Cascade volcanoes and because of the high conductive thermal gradients reported for the area, this feature was initially believed to be a zone of partial melt following the volcanic axis. However, because no teleseismic P wave velocity anomaly has been found, the cause of the conductor is more problematic. While the existence of small zones of melt cannot be ruled out, it is possible that the conductor is caused by a large volume of intensely deformed rocks with brine-filled microfractures.

Mozley, E.C.; Goldstein, N.E.; Morrison, H.F.

1986-10-01

332

Overview of Mount Washington Icing Sensors Project  

NASA Technical Reports Server (NTRS)

NASA, the FAA, the Department of Defense, the National Center for Atmospheric Research and NOAA are developing techniques for retrieving cloud microphysical properties from a variety of remote sensing technologies. The intent is to predict aircraft icing conditions ahead of aircraft. The Mount Washington Icing Sensors Project MWISP), conducted in April, 1999 at Mt. Washington, NH, was organized to evaluate technologies for the prediction of icing conditions ahead of aircraft in a natural environment, and to characterize icing cloud and drizzle environments. April was selected for operations because the Summit is typically in cloud, generally has frequent freezing precipitation in spring, and the clouds have high liquid water contents. Remote sensing equipment, consisting of radars, radiometers and a lidar, was placed at the base of the mountain, and probes measuring cloud particles, and a radiometer, were operated from the Summit. NASA s Twin Otter research aircraft also conducted six missions over the site. Operations spanned the entire month of April, which was dominated by wrap-around moisture from a low pressure center stalled off the coast of Labrador providing persistent upslope clouds with relatively high liquid water contents and mixed phase conditions. Preliminary assessments indicate excellent results from the lidar, radar polarimetry, radiosondes and summit and aircraft measurements.

Ryerson, Charles C.; Politovich, Marcia K.; Rancourt, Kenneth L.; Koenig, George G.; Reinking, Roger F.; Miller, Dean R.

2003-01-01

333

Helmet-Mounted Display Design Guide  

NASA Technical Reports Server (NTRS)

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.

Newman, Richard L.; Greeley, Kevin W.

1997-01-01

334

Electro-optic component mounting device  

DOEpatents

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.

Gruchalla, Michael E. (Albuquerque, NM)

1994-01-01

335

Design of a built-in health monitoring system for bolted thermal protection panels  

NASA Astrophysics Data System (ADS)

Space vehicles require high performance thermal protection systems (TPS) that provide high temperature insulation capability with lower weight, high strength, and reliable integration with the existing system. Carbon-carbon panels mounted with bracket joints are potential future thermal protection systems with light weight, low creep, and high stiffness at high temperatures. However, the thermal protection system experiences a very harsh high-temperature and aerodynamic environment in addition to foreign object impacts. Damage or failure of panels without being detected can lead to catastrophe. Therefore, knowledge of the integrity of the thermal protection system before each launch and reentry is essential to the success of the mission. The objective of the study is to develop a built-in diagnostic system to assess the integrity of TPS panels as well as to lower inspection and maintenance time and costs. An integrated structural health monitoring system is being developed to monitor the TPS panels. The technology includes investigation of the loosening of bolts which connects TPS panels to the supporting structure, and potentially, identifying the location of damage on the panel caused by external impacts from micrometeorites and other objects. The first generation prototype was manufactured and tested in an acoustic chamber which simulated a re-entry environment to investigate the feasibility of the health monitoring system focusing on its survivability and sensitivity. The preliminary results were very promising. Based on the test results, the second generation design was proposed to improve the performance of the first generation design. To put a reliable and accurate decision on the diagnostics of the TPS panels, an advanced algorithm was developed with the aid of a wavelet transform technique.

Yang, Jinkyu; Chang, Fu-Kuo; Derriso, Mark M.

2003-08-01

336

Helmet-Mounted Visual Display For Flight Simulation  

NASA Technical Reports Server (NTRS)

Helmet-mounted visual display system provides pilot with broad range of visual information for flight simulation. Offers nearly unlimited field of regard. Optical fibers transmit wide-angle images in response to motions of head. Two "pancake" lenses mounted on lightweight helmet. Cable of optical fibers carries images to each lens. "Light-valve" projectors deliver computer-generated binocular images to cables.

Cook, Anthony M.

1990-01-01

337

Alternative mounting media for preservation of some protozoa.  

PubMed

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

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

2014-10-01

338

The forces and moments on airplane engine mounts  

NASA Technical Reports Server (NTRS)

A resume of the equations and formulas for the forces and moments on an aircraft-engine mount is presented. In addition, available experimental data have been included to permit the computation of these forces and moments. A sample calculation is made and compared with present design conditions for engine mounts.

Donely, Philip

1936-01-01

339

A Modal Analysis of Lamellar Diffraction Gratings in Conical Mountings  

Microsoft Academic Search

A rigorous modal analysis of lamellar gratings, i.e. gratings having rectangular grooves, in conical mountings is presented. It is an extension of the analysis of Botten et al. which considered non-conical mountings. A key step in the extension is a decomposition of the electromagnetic field in the grating region into two orthogonal components. A computer program implementing this extended modal

Lifeng Li

1993-01-01

340

Demonstration of Rack-Mounted Computer Equipment Cooling Solutions  

E-print Network

equipment were evaluated and compared for their cooling effectiveness and their energy use. The coolingLBNL-6659E Demonstration of Rack-Mounted Computer Equipment Cooling Solutions H. C. Coles-Off energy efficiency evaluation metric. #12;iii ABSTRACT Eleven cooling systems for rack mounted computer

341

Infrasound Associated With Long Period Events at Mount St. Helens  

Microsoft Academic Search

At Mount St. Helens, the process that generates long period (LP) seismic events also generates long period (infrasonic) pressure signals that radiate away from the volcano through the atmosphere. We present data from a co-located infrasound array and broadband seismometer, deployed ~13 km from the summit of Mount St. Helens after the resurgence of activity in October 2004. The temporal

R. S. Matoza; M. A. Garces; M. A. Hedlin

2006-01-01

342

ORIGINAL PAPER Water diffusion in Mount Changbai peralkaline rhyolitic melt  

E-print Network

ORIGINAL PAPER Water diffusion in Mount Changbai peralkaline rhyolitic melt Haoyue Wang Ã? 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

Zhang, Youxue

343

Panel urges cloning ethics boards  

SciTech Connect

A 7-month review of the system that guides U.S. policy on the ethical, legal, and social issues (ELSI) of the Human Genome Project has concluded that it is time for a radical overhaul. A report completed last month recommends that a high-level policy board be created in the office of the Secretary of Health and Human Services to help develop policies on such sensitive issues as genetic privacy, antidiscrimination legislation, public education on genetic risks, and the regulation of genetic testing. If accepted, the proposal-from a review panel chaired by attorney Mark Rothstein of the University of Houston and geneticist M. Anne Spence of the University of California, Irvine-would create a new panel of 15 to 18 members to serve as {open_quotes}a public forum for discussion of ... critical issues.{close_quotes} This panel would replace the current advisory body, known as the ELSI Working Group, and end what the report calls a {open_quotes}discordance{close_quotes} between the broad scope of the Working Group and the {open_quotes}very limited focus{close_quotes} of the research program under which it operates.

Marshall, E.

1997-01-03

344

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

NASA Technical Reports Server (NTRS)

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.

Sumner, I. E.

1978-01-01

345

Perspective with Landsat Overlay, Mount Kilimanjaro, Tanzania  

NASA Technical Reports Server (NTRS)

Mount Kilimanjaro (Kilima Njaro or 'shining mountain' in Swahili), the highest point in Africa, reaches 5,895 meters (19,340 feet) above sea level, tall enough to maintain a permanent snow cap despite being just 330 kilometers (210 miles) south of the equator. It is the tallest free-standing mountain on the Earth's land surface world, rising about 4,600 meters (15,000 feet) above the surrounding plain. Kilimanjaro is a triple volcano (has three peaks) that last erupted perhaps more than 100,000 years ago but still exudes volcanic gases. It is accompanied by about 20 other nearby volcanoes, some of which are seen to the west (left) in this view, prominently including Mount Meru, which last erupted only about a century ago. The volcanic mountain slopes are commonly fertile and support thick forests, while the much drier grasslands of the plains are home to elephants, lions, and other savanna wildlife.

This 3-D perspective view was generated using topographic data from the Shuttle Radar Topography Mission (SRTM), a Landsat 7 satellite image, and a false sky. Topographic expression is vertically exaggerated two times.

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: View width 124 kilometers (77 miles), View distance 166 kilometers (103 miles) Location: 3 degrees South latitude, 37 degrees East longitude Orientation: View North, 2 degrees below horizontal, 2 times vertical exaggeration Image Data: Landsat Bands 3, 2+4, 1 as red, green, blue, respectively. Original Data Resolution: SRTM 1 arc-second (30 meters or 98 feet), Thematic Mapper 30 meters (98 feet) Date Acquired: February 2000 (SRTM), A February 21, 2000 (Landsat 7)

2002-01-01

346

Gravity Probe B Detector Mount Assembly  

NASA Technical Reports Server (NTRS)

In this photo, the Gravity Probe B (GP-B) detector mount assembly is shown in comparison to the size of a dime. The assembly is used to detect exactly how much starlight is coming through different beams from the beam splitter in the telescope. The measurements from the tiny chips inside are what keeps GP-B aimed at the guide star. The GP-B is the relativity experiment developed at Stanford University to test two extraordinary predictions of Albert Einstein's general theory of relativity. The experiment will measure, very precisely, the expected tiny changes in the direction of the spin axes of four gyroscopes contained in an Earth-orbiting satellite at a 400-mile altitude. So free are the gyroscopes from disturbance that they will provide an almost perfect space-time reference system. They will measure how space and time are very slightly warped by the presence of the Earth, and, more profoundly, how the Earth's rotation very slightly drags space-time around with it. These effects, though small for the Earth, have far-reaching implications for the nature of matter and the structure of the Universe. GP-B is among the most thoroughly researched programs ever undertaken by NASA. This is the story of a scientific quest in which physicists and engineers have collaborated closely over many years. Inspired by their quest, they have invented a whole range of technologies that are already enlivening other branches of science and engineering. Launched April 20, 2004 , the GP-B program was managed for NASA by the Marshall Space Flight Center. Development of the GP-B is the responsibility of Stanford University along with major subcontractor Lockheed Martin Corporation. (Image credit to Paul Ehrensberger, Stanford University.)

2004-01-01

347

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

NASA Technical Reports Server (NTRS)

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.

1997-01-01

348

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

NASA Technical Reports Server (NTRS)

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.

1997-01-01

349

A novel triple-actuating mechanism of an active air mount for vibration control of precision manufacturing machines: experimental work  

NASA Astrophysics Data System (ADS)

With the goal of vibration control and isolation in a clean room, we propose a new type of air mount which consists of pneumatic, electromagnetic (EM), and magnetorheological (MR) actuators. The air mount is installed below a semiconductor manufacturing machine to reduce the adverse effects caused by unwanted vibration. The proposed mechanism integrates the forces in a parallel connection of the three actuators. The MR part is designed to operate in an air spring in which the EM part is installed. The control logic is developed with a classical method and a switching mode to avoid operational mismatch among the forces developed. Based on extended microprocessors, a portable, embedded controller is installed to execute both nonlinear logic and digital communication with the peripherals. The pneumatic forces constantly support the heavy weight of an upper structure and maintain the level of the air mount. The MR damper handles the transient response, while the EM controller reduces the resonance response, which is switched mutually with a threshold. Vibration is detected by laser displacement sensors which have submicron resolution. The impact test results of three tons load weight demonstrate practical feasibility by showing that the proposed triple-actuating mechanism can reduce the transient response as well as the resonance in the air mount, resulting in accurate motion of the semiconductor manufacturing machine.

Kim, Hyung-Tae; Kim, Cheol-Ho; Choi, Seung-Bok; Moon, Seok-Jun; Song, Won-Gil

2014-07-01

350

Silicon Carbide Mounts for Fabry-Perot Interferometers  

NASA Technical Reports Server (NTRS)

Etalon mounts for tunable Fabry- Perot interferometers can now be fabricated from reaction-bonded silicon carbide structural components. These mounts are rigid, lightweight, and thermally stable. The fabrication of these mounts involves the exploitation of post-casting capabilities that (1) enable creation of monolithic structures having reduced (in comparison with prior such structures) degrees of material inhomogeneity and (2) reduce the need for fastening hardware and accommodations. Such silicon carbide mounts could be used to make lightweight Fabry-Perot interferometers or could be modified for use as general lightweight optical mounts. Heretofore, tunable Fabry-Perot interferometer structures, including mounting hardware, have been made from the low-thermal-expansion material Invar (a nickel/iron alloy) in order to obtain the thermal stability required for spectroscopic applications for which such interferometers are typically designed. However, the high mass density of Invar structures is disadvantageous in applications in which there are requirements to minimize mass. Silicon carbide etalon mounts have been incorporated into a tunable Fabry-Perot interferometer of a prior design that originally called for Invar structural components. The strength, thermal stability, and survivability of the interferometer as thus modified are similar to those of the interferometer as originally designed, but the mass of the modified interferometer is significantly less than the mass of the original version.

Lindemann, Scott

2011-01-01

351

Camera Calibration for Video See-Through Head-Mounted Display Mike Bajura  

E-print Network

Camera Calibration for Video See-Through Head-Mounted Display Mike Bajura July 7, 1993 Abstract-through head-mounted display applications. 1.0 Introduction In a video see-through head-mounted display system head-mounted display. The combined imagery is shown on the head-mounted display allowing the user

North Carolina at Chapel Hill, University of

352

Decadal Survey: Planetary Rings Panel  

NASA Astrophysics Data System (ADS)

The National Research Council's Committee on Planetary and Lunar Exploration(COMPLEX) met earlier this year to begin the organization of a major activity, "A New Strategy for Solar System Exploration." Several members of the planetary rings community formed an ad hoc panel to discuss the current state and future prospects for the study of planetary rings. In this paper we summarize fundamental questions of ring science, list the key science questions expected to occupy the planetary rings community for the decade 2003-2013, outline the initiatives, missions, and other supporting activities needed to address those questions, and recommend priorities.

Gordon, M. K.; Cuzzi, J. N.; Lissauer, J. J.; Poulet, F.; Brahic, A.; Charnoz, S.; Ferrari, C.; Burns, J. A.; Nicholson, P. D.; Durisen, R. H.; Rappaport, N. J.; Spilker, L. J.; Yanamandra-Fisher, P.; Bosh, A. S.; Olkin, C.; Larson, S. M.; Graps, A. L.; Krueger, H.; Black, G. J.; Festou, M.; Karjalainen, R.; Salo, H. J.; Murray, C. D.; Showalter, M. R.; Dones, L.; Levison, H. F.; Namouni, F.; Araki, S.; Lewis, M. C.; Brooks, S.; Colwell, J. E.; Esposito, L. W.; Horanyi, M.; Stewart, G. R.; Krivov, A.; Schmidt, J.; Spahn, F.; Hamilton, D. P.; Giuliatti-Winter, S.; French, R. G.

2001-11-01

353

Amplifying Head Movements with Head-Mounted Displays The head-mounted display (HMD) is a popular form of virtual display, due to its ability to  

E-print Network

1 Amplifying Head Movements with Head-Mounted Displays Abstract The head-mounted display (HMD offered by contemporary head mounted displays (HMDs), and reports results of an experiment to test its with the amplified head movement, and we report on that. 2 Background and related work For some time the head mounted

Manchester, University of

354

Methods and apparatus for radially compliant component mounting  

DOEpatents

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.

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

355

Experimental Evaluation of the "Polished Panel Optical Receiver" Concept on the Deep Space Network's 34 Meter Antenna  

NASA Technical Reports Server (NTRS)

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 proposes to polish the aluminum reflector panels of 34-meter microwave antennas to high reflectance, and accept the relatively large spotsize generated by even state-of-the-art polished aluminum panels. 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. A custom designed aluminum panel has 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. Using the planet Jupiter as the optical point-source, the point-spread function (PSF) generated by the polished panel has been characterized, the array data processed to determine the center of the intensity distribution, and expected communications performance of the proposed polished panel optical receiver has been evaluated.

Vilnrotter, Victor A.

2012-01-01

356

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

SciTech Connect

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.

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

1995-01-01

357

Solar-Panel Dust Accumulation and Cleanings  

NASA Technical Reports Server (NTRS)

Air-fall dust accumulates on the solar panels of NASA's Mars Exploration Rovers, reducing the amount of sunlight reaching the solar arrays. Pre-launch models predicted steady dust accumulation. However, the rovers have been blessed with occasional wind events that clear significant amounts of dust from the solar panels.

This graph shows the effects of those panel-cleaning events on the amount of electricity generated by Spirit's solar panels. The horizontal scale is the number of Martian days (sols) after Spirit's Jan. 4, 2005, (Universal Time) landing on Mars. The vertical scale indicates output from the rover's solar panels as a fraction of the amount produced when the clean panels first opened. Note that the gradual declines are interrupted by occasional sharp increases, such as a dust-cleaning event on sol 420.

2005-01-01

358

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

NASA Technical Reports Server (NTRS)

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.

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

2000-01-01

359

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

NASA Technical Reports Server (NTRS)

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

Maasha, Rumaasha; Towner, Robert L.

2012-01-01

360

Gallium arsenide - Solar panel assembly technology  

Microsoft Academic Search

Gallium arsenide (GaAs) solar cell devices are maturing at 18 percent AM0 efficiencies for liquid phase epitaxy (LPE) technology, and efforts must be intensified placing necessary focus on the development of panel assembly techniques, and ultimately panel manufacturing methods capable of maintaining these high efficiencies for on-panel operation. Key problems and solutions are described which were experienced during the assembly

D. Zemmrich; N. Mardesich; B. Macfarlane; R. Loo

1984-01-01

361

Sound transmission loss of composite sandwich panels  

NASA Astrophysics Data System (ADS)

Light composite sandwich panels are increasingly used in automobiles, ships and aircraft, because of the advantages they offer of high strength-to-weight ratios. However, the acoustical properties of these light and stiff structures can be less desirable than those of equivalent metal panels. These undesirable properties can lead to high interior noise levels. A number of researchers have studied the acoustical properties of honeycomb and foam sandwich panels. Not much work, however, has been carried out on foam-filled honeycomb sandwich panels. In this dissertation, governing equations for the forced vibration of asymmetric sandwich panels are developed. An analytical expression for modal densities of symmetric sandwich panels is derived from a sixth-order governing equation. A boundary element analysis model for the sound transmission loss of symmetric sandwich panels is proposed. Measurements of the modal density, total loss factor, radiation loss factor, and sound transmission loss of foam-filled honeycomb sandwich panels with different configurations and thicknesses are presented. Comparisons between the predicted sound transmission loss values obtained from wave impedance analysis, statistical energy analysis, boundary element analysis, and experimental values are presented. The wave impedance analysis model provides accurate predictions of sound transmission loss for the thin foam-filled honeycomb sandwich panels at frequencies above their first resonance frequencies. The predictions from the statistical energy analysis model are in better agreement with the experimental transmission loss values of the sandwich panels when the measured radiation loss factor values near coincidence are used instead of the theoretical values for single-layer panels. The proposed boundary element analysis model provides more accurate predictions of sound transmission loss for the thick foam-filled honeycomb sandwich panels than either the wave impedance analysis model or the statistical energy analysis model.

Zhou, Ran

362

Uncertainties in predicting solar panel power output  

NASA Technical Reports Server (NTRS)

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.

Anspaugh, B.

1974-01-01

363

Development of Electrostatically Clean Solar Array Panels  

NASA Technical Reports Server (NTRS)

Certain missions require Electrostatically Clean Solar Array (ECSA) panels to establish a favorable environment for the operation of sensitive scientific instruments. The objective of this program was to demonstrate the feasibility of an ECSA panel that minimizes panel surface potential below 100mV in LEO and GEO charged particle environments, prevents exposure of solar cell voltage and panel insulating surfaces to the ambient environment, and provides an equipotential, grounded structure surrounding the entire panel. An ECSA panel design was developed that uses a Front Side Aperture-Shield (FSA) that covers all inter-cell areas with a single graphite composite laminate, composite edge clips for connecting the FSA to the panel substrate, and built-in tabs that interconnect the FSA to conductive coated coverglasses using a conductive adhesive. Analysis indicated the ability of the design to meet the ECSA requirements. Qualification coupons and a 0.5m x 0.5m prototype panel were fabricated and tested for photovoltaic performance and electrical grounding before and after exposure to acoustic and thermal cycling environments. The results show the feasibility of achieving electrostatic cleanliness with a small penalty in mass, photovoltaic performance and cost, with a design is structurally robust and compatible with a wide range of current solar panel technologies.

Stern, Theodore G.

2000-01-01

364

17. DETAIL VIEW OF CUPOLA ATOP OPERATOR'S CABIN WHICH MOUNTS ...  

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

17. DETAIL VIEW OF CUPOLA ATOP OPERATOR'S CABIN WHICH MOUNTS SIGNAL HORNS, WEATHER VANE - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

365

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

366

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

367

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

368

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

369

Low radioactivity material for use in mounting radiation detectors  

NASA Technical Reports Server (NTRS)

Two materials, sapphire and synthetic quartz, have been found for use in Ge detector mounting assemblies. These materials combine desirable mechanical, thermal, and electrical properties with the radioactive cleanliness required to detect minimal amounts of K, Th, and U.

Fong, Marshall; Metzger, Albert E.; Fox, Richard L.

1988-01-01

370

Two-Degree-of-Freedom Mount System for Flutter Models  

NASA Technical Reports Server (NTRS)

Flexible rods replace conventional bearing supports to minimize structural damping. Aerodynamic damping not masked by effects of mount system, making more accurate studies possible of how aerodynamic damping varies as flow over model changed. New system called PAPA.

Farmer, M. G.

1983-01-01

371

Astronaut Edward Gibson stands at Apollo Telescope Mount in Skylab  

NASA Technical Reports Server (NTRS)

Scientist-Astronaut Edward G. Gibson, Skylab 4 science pilot, stands at the Apollo Telescope Mount (ATM) console in the Multiple Docking Adapter (MDA) of the Skylab space station cluster in Earth orbit.

1974-01-01

372

Rapid location of mount points JONATHAN M. SMITH  

E-print Network

­­ ­­ Rapid location of mount points JONATHAN M. SMITH Computer Science Department, Columbia ``core'' is ``/u2/smith/core''. The current directory is a directory­valued variable. It is an implied

373

A Messy Fight over Money Divides Mount Holyoke.  

ERIC Educational Resources Information Center

Describes how Mount Holyoke College and its alumnae association are in a messy public fight over money, specifically who owns an annual fund to which 51 percent of the college's alumni contributed last year. (EV)

Lively, Kit

2001-01-01

374

29 CFR 1926.553 - Base-mounted drum hoists.  

Code of Federal Regulations, 2010 CFR

...OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) SAFETY AND HEALTH REGULATIONS FOR CONSTRUCTION Cranes, Derricks, Hoists, Elevators, and Conveyors § 1926.553 Base-mounted drum hoists. (a) General...

2010-07-01

375

14. BRIDGE ABUTMENT AND ARCH TRUSS MOUNTING PLATE SHOWING EYEBAR ...  

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

14. BRIDGE ABUTMENT AND ARCH TRUSS MOUNTING PLATE SHOWING EYE-BAR CONNECTION AND EYE-BAR PIN LOCATION - Spruce Street Bridge, East Spruce Street, 500 Block, spanning Power Canal, Sault Ste. Marie, Chippewa County, MI

376

Unique mounting for miniature optics at cryogenic temperatures  

NASA Astrophysics Data System (ADS)

This paper highlights a mounting solution for miniature, high aspect ratio Zinc Selenide (ZnSe) optics capable of sustaining high vibration loads and cryogenic temperatures. The GOES-R Advanced Baseline Imager (ABI) optical design requires ZnSe filters that have a significantly higher-than-standard aspect ratio. The thin structure, along with the material properties of ZnSe, lead to a filter that is very delicate. The mounting technique minimizes stresses induced over thermal extremes, while maintaining sufficient preload for launch loads. The filters are mounted to metallic housings using a spring loaded retainer and compliant materials. Detailed analysis of the mounting and an understanding of the unique material properties enables the design to be successful. Special attention is given to materials passing through glass transition temperatures. This design was qualified through extensive thermal cycling and vibration testing, and exhibited performance acceptable for production.

Leahy, Zachary N.; Magner, Andrew J.

2013-09-01

377

7. VIEW FROM NEAR INSPIRATION POINT, MOUNT RAINIER IN BACKGROUND, ...  

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

7. VIEW FROM NEAR INSPIRATION POINT, MOUNT RAINIER IN BACKGROUND, HAER HISTORIAN RICHARD QUIN HOLDING SCALE STICK - Stevens Canyon Highway, Between Paradise, WA, & State Highway 123, Ashford, Pierce County, WA

378

29 CFR 1926.553 - Base-mounted drum hoists.  

...CONSTRUCTION Helicopters, Hoists, Elevators, and Conveyors § 1926.553 Base-mounted...hazard, shall be guarded. (2) All controls used during the normal operation cycle...remotely operated hoists stop when any control is ineffective. (4) All...

2014-07-01

379

29 CFR 1926.553 - Base-mounted drum hoists.  

Code of Federal Regulations, 2013 CFR

...CONSTRUCTION Helicopters, Hoists, Elevators, and Conveyors § 1926.553 Base-mounted...hazard, shall be guarded. (2) All controls used during the normal operation cycle...remotely operated hoists stop when any control is ineffective. (4) All...

2013-07-01

380

29 CFR 1926.553 - Base-mounted drum hoists.  

Code of Federal Regulations, 2012 CFR

...CONSTRUCTION Helicopters, Hoists, Elevators, and Conveyors § 1926.553 Base-mounted...hazard, shall be guarded. (2) All controls used during the normal operation cycle...remotely operated hoists stop when any control is ineffective. (4) All...

2012-07-01

381

How Mount Stromlo Observatory shed its imperial beginnings  

NASA Astrophysics Data System (ADS)

In the 90 years since its foundation in 1924, Mount Stromlo Observatory in Australia has changed from an outpost of empire to an international research institution. Ragbir Bhathal examines how the British influence waxed and waned.

Bhathal, Ragbir

2014-12-01

382

10. ENGINE TEST CELL BUILDING INTERIOR. CELL 4, MOUNTING STAND. ...  

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

10. ENGINE TEST CELL BUILDING INTERIOR. CELL 4, MOUNTING STAND. LOOKING NORTHWEST. - Fairchild Air Force Base, Engine Test Cell Building, Near intersection of Arnold Street & George Avenue, Spokane, Spokane County, WA

383

VIEW SOUTHEAST, ECCENTRIC HOUSE, INTERIOR, NOTE DOUBLE OVER MOUNTED ECCENTRICS ...  

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

VIEW SOUTHEAST, ECCENTRIC HOUSE, INTERIOR, NOTE DOUBLE OVER MOUNTED ECCENTRICS WITH ATTACHED ROD LINES ON GEAR ASSEMBLY. - South Penn Oil Company, G. M. Mead Lot 492 Lease, Morrison Run Field, Clarendon, Warren County, PA

384

76 FR 52313 - Bottom Mount Combination Refrigerator-Freezers From the Republic of Korea and Mexico...  

Federal Register 2010, 2011, 2012, 2013

...Bottom Mount Combination Refrigerator-Freezers From the Republic of Korea...bottom mount combination refrigerator-freezers from the Republic of Korea...Bottom Mount Combination Refrigerator-Freezers From the Republic of...

2011-08-22

385

77 FR 28623 - Bottom Mount Combination Refrigerator-Freezers From Korea and Mexico  

Federal Register 2010, 2011, 2012, 2013

...Bottom Mount Combination Refrigerator-Freezers From Korea and Mexico Determinations...bottom mount combination refrigerator-freezers from Korea, provided for...bottom mount combination refrigerator-freezers, provided for in...

2012-05-15

386

76 FR 32142 - Bottom Mount Combination Refrigerator-Freezers From the Republic of Korea: Postponement of...  

Federal Register 2010, 2011, 2012, 2013

...Bottom Mount Combination Refrigerator-Freezers From the Republic of Korea...bottom mount combination refrigerator-freezers from the Republic of Korea...Bottom Mount Combination Refrigerator-Freezers From the Republic of...

2011-06-03

387

76 FR 29791 - Bottom Mount Combination Refrigerator-Freezers From Korea and Mexico  

Federal Register 2010, 2011, 2012, 2013

...Bottom Mount Combination Refrigerator-Freezers From Korea and Mexico Determinations...bottom mount combination refrigerator-freezers, provided for in subheadings...bottom mount combination refrigerator-freezers, provided for in...

2011-05-23

388

29 CFR 1910.67 - Vehicle-mounted elevating and rotating work platforms.  

...Vehicle-mounted elevating and rotating work platforms. 1910.67 Section 1910...Platforms, Manlifts, and Vehicle-Mounted Work Platforms § 1910.67 Vehicle-mounted elevating and rotating work platforms. (a) Definitions...

2014-07-01

389

29 CFR 1910.67 - Vehicle-mounted elevating and rotating work platforms.  

Code of Federal Regulations, 2011 CFR

...Vehicle-mounted elevating and rotating work platforms. 1910.67 Section 1910...Platforms, Manlifts, and Vehicle-Mounted Work Platforms § 1910.67 Vehicle-mounted elevating and rotating work platforms. (a) Definitions...

2011-07-01

390

29 CFR 1910.67 - Vehicle-mounted elevating and rotating work platforms.  

Code of Federal Regulations, 2012 CFR

...Vehicle-mounted elevating and rotating work platforms. 1910.67 Section 1910...Platforms, Manlifts, and Vehicle-Mounted Work Platforms § 1910.67 Vehicle-mounted elevating and rotating work platforms. (a) Definitions...

2012-07-01

391

29 CFR 1910.67 - Vehicle-mounted elevating and rotating work platforms.  

Code of Federal Regulations, 2013 CFR

...Vehicle-mounted elevating and rotating work platforms. 1910.67 Section 1910...Platforms, Manlifts, and Vehicle-Mounted Work Platforms § 1910.67 Vehicle-mounted elevating and rotating work platforms. (a) Definitions...

2013-07-01

392

29 CFR 1910.67 - Vehicle-mounted elevating and rotating work platforms.  

Code of Federal Regulations, 2010 CFR

...Vehicle-mounted elevating and rotating work platforms. 1910.67 Section 1910...Platforms, Manlifts, and Vehicle-Mounted Work Platforms § 1910.67 Vehicle-mounted elevating and rotating work platforms. (a) Definitions...

2010-07-01

393

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

PubMed

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

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

2014-10-01

394

Re-Active Passive devices for control of noise transmission through a panel  

NASA Astrophysics Data System (ADS)

Re-Active Passive 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 Re-Active Passive device uses passive constrained layer damping to cover relatively high-frequency range (>150 Hz), reactive distributed vibration absorber to cover the medium-frequency range (50-200 Hz), and active control for controlling low frequencies (<150 Hz). The actuator was applied to control noise transmission through a panel mounted in the Transmission Loss Test Facility at Virginia Tech. Experimental results are presented for the bare panel, and combinations of passive treatment, reactive treatment, and active control. Results indicate that three Re-Active Passive 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 g to the panel mass of 6.0 kg, or approximately 5%, not including control electronics.

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

2008-01-01

395

Combating Problems with Solar Power: A cost Effective Improvement on the Conversion Efficiency of Solar Panels  

E-print Network

Absract- There is no point harnessing an energy resource that has no economic value. Solar energy poses a strong threat to other forms of energy due to its purity and availability. The problem associated with harnessing solar power mainly comes from the cost and efficiency of the photovoltaic (P-V) panels. This work proffers a solution to this problem by combining the effect of colours and lenses based on the principle of white light spectrum and its behavior with lenses. A 0.9m by 0.3m mono-crystalline solar panel with a manufacturer specification of 18 % efficiency, 50W maximum output power, 18V maximum voltage output & 2.77A maximum current output was used for experiments in combination with a sheet of convex lens, glass panes dyed with various colours of the light spectrum, a battery operated portable multimeter, a meter rule, and a mount frame. Experiments were conducted for different time schedules for three days of assumed equal intensity. The results of the experiments are presented in stages and it was discovered that at stage 3, the system which is a combination of solar panel, violet colour filter and convex lens yielded a productivity of over 96 % with power output of 47.67W.A. This is almost a total extortion of white light energy as provided by the solar panel.

Engr E. M. Onyekachi; Engr I. O. Nwabueze

396

Vibration isolation of automotive vehicle engine using periodic mounting systems  

NASA Astrophysics Data System (ADS)

Customer awareness and sensitivity to noise and vibration levels have been raised through increasing television advertisement, in which the vehicle noise and vibration performance is used as the main market differentiation. This awareness has caused the transportation industry to regard noise and vibration as important criteria for improving market shares. One industry that tends to be in the forefront of the technology to reduce the levels of noise and vibration is the automobile industry. Hence, it is of practical interest to reduce the vibrations induced structural responses. The automotive vehicle engine is the main source of mechanical vibrations of automobiles. The engine is vulnerable to the dynamic action caused by engine disturbance force in various speed ranges. The vibrations of the automotive vehicle engines may cause structural failure, malfunction of other parts, or discomfort to passengers because of high level noise and vibrations. The mounts of the engines act as the transmission paths of the vibrations transmitted from the excitation sources to the body of the vehicle and passengers. Therefore, proper design and control of these mounts are essential to the attenuation of the vibration of platform structures. To improve vibration resistant capacities of engine mounting systems, vibration control techniques may be used. For instance, some passive and semi-active dissipation devices may be installed at mounts to enhance vibration energy absorbing capacity. In the proposed study, a radically different concept is presented whereby periodic mounts are considered because these mounts exhibit unique dynamic characteristics that make them act as mechanical filters for wave propagation. As a result, waves can propagate along the periodic mounts only within specific frequency bands called the "Pass Bands" and wave propagation is completely blocked within other frequency bands called the "Stop Bands". The experimental arrangements, including the design of mounting systems with plain and periodic mounts will be studied first. The dynamic characteristics of such systems will be obtained experimentally in both cases. The tests will be then carried out to study the performance characteristics of periodic mounts with geometrical and/or material periodicity. The effectiveness of the periodicity on the vibration levels of mounting systems will be demonstrated theoretically and experimentally. Finally, the experimental results will be compared with the theoretical predictions.

Asiri, S.

2005-05-01

397

Using a Head-Mounted Camera to Infer Attention Direction  

ERIC Educational Resources Information Center

A head-mounted camera was used to measure head direction. The camera was mounted to the forehead of 20 6- and 20 12-month-old infants while they watched an object held at 11 horizontal (-80° to + 80°) and 9 vertical (-48° to + 50°) positions. The results showed that the head always moved less than required to be on target. Below 30° in the…

Schmitow, Clara; Stenberg, Gunilla; Billard, Aude; von Hofsten, Claes

2013-01-01

398

Testing tail-mounted transmitters with Myocastor coypus (nutria)  

USGS Publications Warehouse

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.

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

2007-01-01

399

Anaglyph, Mount St Helens, Washington State  

NASA Technical Reports Server (NTRS)

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)

2002-01-01

400

Stereo Pair, Mount St Helens, Washington State  

NASA Technical Reports Server (NTRS)

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)

2002-01-01

401

6. COMPRESSOR CONTROL PANELS: AT LEFT, 6,000 P.S.I. PANEL, CIRCA ...  

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

6. COMPRESSOR CONTROL PANELS: AT LEFT, 6,000 P.S.I. PANEL, CIRCA 1957; AT RIGHT, FACING CAMERA, 10,000 P.S.I. PANEL. - Edwards Air Force Base, Air Force Rocket Propulsion Laboratory, Helium Compression Plant, Test Area 1-115, intersection of Altair & Saturn Boulevards, Boron, Kern County, CA

402

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

E-print Network

#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

Crowther, Paul

403

Geology and geochemistry of the Mount Riley-Mount Cox pluton, Dona Ana County, New Mexico  

SciTech Connect

The Mount Riley-Mount Cox area is comprised of a relatively homogeneous pluton of rhyodacite rising some 1600 feet above the La Mesa surface. The pluton, of apparent Tertiary age, intrudes Cretaceous sedimentary rocks and Tertiary ( ) latite and tuff. The rhyodacite is holocrystalline, light gray to pinkish gray, porphyritic to microporphyritic, and locally banded. Phenocrysts include hornblende, quartz, biotite, and calcite. The phenocrysts range in size from 0.2 to 2 mm and make up one to fifteen percent of the rock. The phenocrysts often display a glomerophyric texture within a trachytic groundmass. The groundmass ranges from cryptocrystalline to very fine grained and is composed of plagioclase, quartz, potassium feldspar, hornblende/biotite, and iron-oxide material. Locally, the rhyodacite displays millimeter-scale banding and a poikilitic texture consisting of quartz oikiocrysts and plagioclase chadocrysts. The rhyodacite averages 68.74%, SiO/sub 2/, 0.39% TiO/sub 2/, 16.40% Al/sub 2/O/sub 3/, 2.87% Fe/sub t/, 0.10% MnO, 1.21% MgO, 2.56% CaO, 3.79% Na/sub 2/O, and 3.96% K/sub 2/O. The rhyodacite is cut by veins and veinlets of brown to white calcite. The veins attain a maximum thickness of one meter, are locally bordered by calcite-cemented breccia zones, and locally include pyrite. The veins trend north or northwest, consistent with regional trends for the Rio Grande rift and the Texas Lineament, respectively. Sixty-five samples of rhyodacite, breccia, and vein were analyzed for 31 elements by emission-spectrographic methods. Trace-element data suggestive of hydrothermal mineralization was not recognized.

Zimbelman, D.R.; Siems, D.F.; Kilburn, J.E.; Hubert, A.E.

1985-01-01

404

Space Radar Image of Mount Pinatubo Volcano, Philippines  

NASA Technical Reports Server (NTRS)

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

1994-01-01

405

Design considerations for compression panels at elevated temperature  

NASA Technical Reports Server (NTRS)

The potential of graphite/polyimide is assessed on a graphite/polyimide honeycomb sandwich panels and stiffened panel concepts to develop lightweight panels for use at elevated temperatures. The capability is attained to correctly predict panel buckling behavior and panel strength at elevated temperatures.

Mcwithey, R. R.; Camarda, C. J.; Weaver, G. G.

1979-01-01

406

Panel fabrication utilizing GaAs solar cells  

NASA Technical Reports Server (NTRS)

The development of the GaAs solar cells for space applications is described. The activities in the fabrication of GaAs solar panels are outlined. Panels were fabricated while introducing improved quality control, soldering laydown and testing procedures. These panels include LIPS II, San Marco Satellite, and a low concentration panel for Rockwells' evaluation. The panels and their present status are discussed.

Mardesich, N.

1984-01-01

407

Statistical and procedural issues in the use of heated taxidermic mounts  

USGS Publications Warehouse

Studies using mounts have an inherently nested error structure; calibration and standardization should use the appropriate procedures and statistics. One example is that individual mount differences are nested within morphological factors related to species, age, or gender; without replication, mount differences may be confused with differences due to morphology. Also, the sensitivity of mounts to orientation to wind or sun is nested within mount; without replication, inadvertent variation in mount positioning may be confused with differences among mounts. Data on heat loss from a of 1-day-old mallard duckling mount are used to illustrate orientation sensitivity. (C) 2000 Elsevier Science Ltd. All rights reserved.

Bakken, G.S.; Kenow, K.P.; Korschgen, C.E.; Boysen, A.F.

2000-01-01

408

Life associated with a 2.76 Ga ephemeral pond?: evidence from Mount Roe #2 paleosol  

NASA Technical Reports Server (NTRS)

Dark sericitic material at and near the top of the 2.765 +/- 0.01 Ga Mount Roe #2 paleosol in Western Australia contains 0.05-0.10 wt% organic carbon with delta 13C values between -33% and -51% PDB (Peedee belemnite). Such negative isotopic values strongly indicate that methanotrophs once inhabited this material. The textures and the chemical composition of the dark sericitic material indicate that the methanotrophs lived in or at the edges of ephemeral ponds, that these ponds became desiccated, and that heavy rains transported the material to its present sites. The discovery of methanotrophs associated with the Mount Roe #2 paleosol may extend their geologic record on land by at least 1.5 b.y. Methanotrophy in this setting is consistent with the notion that atmospheric methane levels were > or = 20 (mu)atm during the Late Archean. The radiative forcing due to such high atmospheric methane levels could have compensated for the faint younger sun and helped to prevent massive glaciation during the Late Archean.

Rye, R.; Holland, H. D.

2000-01-01

409

Tracking a head-mounted display in a room-sized environment with head-mounted cameras  

Microsoft Academic Search

This paper presents our efforts to accurately track a Head-Mounted Display (HMD) in a largeenvironment. We review our current benchtop prototype (introduced in [WCF90]), then describe our plansfor building the full-scale system. Both systems use an inside-out optical tracking scheme, where lateraleffectphotodiodes mounted on the user's helmet view flashing infrared beacons placed in the environment.Church's method uses the measured 2D

Jih-Fang Wang; Ronald T. Azuma; Gary Bishop; Vernon Chi; John Eyles; Henry Fuchs

1990-01-01

410

Laser illuminated flat panel display  

SciTech Connect

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.

Veligdan, J.T.

1995-12-31

411

Thermal response of composite panels  

NASA Technical Reports Server (NTRS)

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.

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

1979-01-01

412

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

413

An analysis of consumer panel data  

Microsoft Academic Search

In terms of collecting comprehensive panel expenditure data, there are trade-offs to be made in terms of the demands imposed on respondents and the level of detail and spending coverage collected. Existing comprehensive spending data tends to be cross-sectional whilst panel studies include only limited expenditure questions that record spending only as broad aggregates. More recently, economists have begun to

Andrew Leicester; Zoë Oldfield

2009-01-01

414

A solar panel for residential use  

Microsoft Academic Search

A solar panel is designed for manufacture as a house construction module. This module can be inserted as a roof panel to build the collector as an integral part of the roof. The design utilizes the vee-corrugating technique to improve solar absorption and small triangular ducts to increase the heat transfer area between the solar plate and the transport fluid.

B. F. Parker

1977-01-01

415

Extended use of photovoltaic solar panels  

Microsoft Academic Search

The use of photovoltaic solar panels (and related generation of electric power) can be extended to a 24 hours per day under any environmental condition by equipping them with an artificial source of light, with emitting wavelengths matched to the photovoltaic solar panels, to be turned on in the absence of sunlight. This source of light can be obtained by

Guido E. Guazzoni; M. Frank Rose

1996-01-01

416

Improving Strength of Postbuckled Panels Through Stitching  

NASA Technical Reports Server (NTRS)

The behavior of blade-stiffened graphite-epoxy panels with impact damage is examined to determine the effect of adding through-the-thickness stitches in the stiffener flange-to-skin interface. The influence of stitches is evaluated by examining buckling and failure for panels with failure loads up to 3.5 times greater than buckling loads. Analytical and experimental results from four configurations of panel specimens are presented. For each configuration, two panels were manufactured with skin and flanges held together with through-the-thickness stitches introduced prior to resin infusion and curing and one panel was manufactured with no stitches holding the flange to the skin. No mechanical fasteners were used for the assembly of any of these panels. Panels with and without low-speed impact damage were loaded to failure in compression. Buckling and failure modes are discussed. Stitching had little effect on buckling loads but increased the failure loads of impact-damaged panels by up to 30%.

Jegley, Dawn C.

2007-01-01

417

MoMLA: From Panel to Gallery  

ERIC Educational Resources Information Center

The work presented here in this "Panel to Gallery" was originally produced and assembled for the 2012 Modern Language Association Conference in Seattle, Washington. Similar to "From Gallery to Webtext", the event Victor curated for the 2006 College Composition and Communication Conference, this "Panel to Gallery" event at MLA set aside the…

Vitanza, Victor, Ed.; Kuhn, Virginia, Ed.

2013-01-01

418

Sound transmission loss of composite sandwich panels  

Microsoft Academic Search

Light composite sandwich panels are increasingly used in automobiles, ships and aircraft, because of the advantages they offer of high strength-to-weight ratios. However, the acoustical properties of these light and stiff structures can be less desirable than those of equivalent metal panels. These undesirable properties can lead to high interior noise levels. A number of researchers have studied the acoustical

Ran Zhou

2009-01-01

419

Integral refilmer lip for floatwall panels  

Microsoft Academic Search

This patent describes a liner for a combustor of a gas turbine engine having a generally cylindrically shaped shell and spaced co-extensive panels extending circumferentially and axially relative to the shell, the shell having an outer surface being exposed to cooler air and the panels each having an inner surface being exposed to combustion gases. The shell is bent radially

1987-01-01

420

Thermic diode solar panels for space heating  

Microsoft Academic Search

The paper describes the design and operation of thermic diode panels. A single 2 x 8 ft panel contains all the elements of a complete solar energy system: collectors, controls, storage, heat exchangers, and ducting. Heat is transferred from the collector to the storage layer by natural flow of heated water, the flow being controlled by a check valve that

S. Buckley

1978-01-01

421

A National Implementation Panel for Detectable Warnings.  

ERIC Educational Resources Information Center

This paper describes meetings by a panel of travel, access, and public transit professionals to discuss detectable warning systems (devices to notify individuals with visual impairments of hazards along their path of travel). Recommendations of the panel for universal design standards and educating communities about detectable warning systems are…

Joffee, E.

1996-01-01

422

Student News Spring, 2012 AWWA Career Panel  

E-print Network

of the American Water Works Association (AWWA) held a first-of-its-kind "Career Panel" event. The panel (president-elect), Jessica Bush (secretary), and Kevin McIntyre (treasurer). The chapter's Industry Liaison System), Greg Wright (Renewable Water Resources), Gary Visser (Hach Company), Angie Mettlen (WK Dickson

Stuart, Steven J.

423

Bayesian Inference for Political Science Panel Data  

Microsoft Academic Search

To answer substantive questions regarding individual change, it is necessary to collect information from each subject multiple times. For decades, political scientists have col- lected a great deal of panel data, relating to mass behavior, comparative politics, and international relations. Unfortunately, the most commonly used method of analyzing panel data - linear models with individual fixed eects - oftentimes masks

Andrew D. Martin; Kyle L. Saunders

424

Documentation Panels Enhance Teacher Education Programs  

ERIC Educational Resources Information Center

Documentation of children's projects is advantageous to their learning process and is also a good method for student teachers to observe the process of learning. Documentation panels are a unique way to help student teachers understand how children learn. Completing a panel requires a student teacher to think through a process. Teachers must learn…

Warash, Bobbie Gibson

2005-01-01

425

Unit root tests for panel data  

Microsoft Academic Search

This paper develops unit root tests for panel data. These tests are devised under more general assumptions than the tests previously proposed. First, the number of groups in the panel data is assumed to be either finite or infinite. Second, each group is assumed to have different types of nonstochastic and stochastic components. Third, the time series spans for the

In Choi

2001-01-01

426

AQUEOUS HOMOGENEOUS REACTORTECHNICAL PANEL REPORT  

SciTech Connect

Considerable interest has been expressed for developing a stable U.S. production capacity for medical isotopes and particularly for molybdenum- 99 (99Mo). This is motivated by recent re-ductions in production and supply worldwide. Consistent with U.S. nonproliferation objectives, any new production capability should not use highly enriched uranium fuel or targets. Conse-quently, Aqueous Homogeneous Reactors (AHRs) are under consideration for potential 99Mo production using low-enriched uranium. Although the Nuclear Regulatory Commission (NRC) has guidance to facilitate the licensing process for non-power reactors, that guidance is focused on reactors with fixed, solid fuel and hence, not applicable to an AHR. A panel was convened to study the technical issues associated with normal operation and potential transients and accidents of an AHR that might be designed for isotope production. The panel has produced the requisite AHR licensing guidance for three chapters that exist now for non-power reactor licensing: Reac-tor Description, Reactor Coolant Systems, and Accident Analysis. The guidance is in two parts for each chapter: 1) standard format and content a licensee would use and 2) the standard review plan the NRC staff would use. This guidance takes into account the unique features of an AHR such as the fuel being in solution; the fission product barriers being the vessel and attached systems; the production and release of radiolytic and fission product gases and their impact on operations and their control by a gas management system; and the movement of fuel into and out of the reactor vessel.

Diamond, D.J.; Bajorek, S.; Bakel, A.; Flanagan, G.; Mubayi, V.; Skarda, R.; Staudenmeier, J.; Taiwo, T.; Tonoike, K.; Tripp, C.; Wei, T.; Yarsky, P.

2010-12-03

427

Hypervelocity Impact Performance of Open Cell Foam Core Sandwich Panel Structures  

NASA Technical Reports Server (NTRS)

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.

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

2010-01-01

428

Development of stitching reinforcement for transport wing panels  

NASA Technical Reports Server (NTRS)

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.

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

1991-01-01

429

Report of the Federal Internetworking Requirements Panel  

SciTech Connect

The Federal Internetworking Requirements Panel (FIRP) was established by the National Institute of Standards and Technology (NIST) to reassess Federal requirements for open systems networks and to recommend policy on the Government`s use of networking standards. The Panel was chartered to recommend actions which the Federal Government can take to address the short and long-term issues of interworking and convergence of networking protocols--particularly the Internet Protocol Suite (IPS) and Open Systems Interconnection (OSI) protocol suite and, when appropriate, proprietary protocols. The Panel was created at the request of the Office of Management and Budget in collaboration with the Federal Networking Council and the Federal Information Resources Management Policy Council. The Panel`s membership and charter are contained in an appendix to this report.

NONE

1994-05-31

430

Reliability of stiffened structural panels: Two examples  

NASA Technical Reports Server (NTRS)

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.

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

1992-01-01

431

Method for producing micro heat panels  

NASA Technical Reports Server (NTRS)

Flat or curved micro heat pipe panels are fabricated by arranging essentially parallel filaments in the shape of the desired panel. The configuration of the filaments corresponds to the desired configuration of the tubes that will constitute the heat pipes. A thermally conductive material is then deposited on and around the filaments to fill in the desired shape of the panel. The filaments are then removed, leaving tubular passageways of the desired configuration and surface texture in the material. The tubes are then filled with a working fluid and sealed. Composite micro heat pipe laminates are formed by layering individual micro heat pipe panels and bonding them to each other to form a single structure. The layering sequence of the micro heat pipe panels can be tailored to transport heat preferentially in specific directions as desired for a particular application.

Camarda, Charles J. (Inventor); Peterson, George P. (Inventor); Rummler, Donald R. (Inventor)

1997-01-01

432

Thin film photovoltaic panel and method  

DOEpatents

A thin film photovoltaic panel includes a backcap for protecting the active components of the photovoltaic cells from adverse environmental elements. A spacing between the backcap and a top electrode layer is preferably filled with a desiccant to further reduce water vapor contamination of the environment surrounding the photovoltaic cells. The contamination of the spacing between the backcap and the cells may be further reduced by passing a selected gas through the spacing subsequent to sealing the backcap to the base of the photovoltaic panels, and once purged this spacing may be filled with an inert gas. The techniques of the present invention are preferably applied to thin film photovoltaic panels each formed from a plurality of photovoltaic cells arranged on a vitreous substrate. The stability of photovoltaic conversion efficiency remains relatively high during the life of the photovoltaic panel, and the cost of manufacturing highly efficient panels with such improved stability is significantly reduced.

Ackerman, Bruce (El Paso, TX); Albright, Scot P. (El Paso, TX); Jordan, John F. (El Paso, TX)

1991-06-11

433

Ring connection for porous combustor wall panels  

NASA Technical Reports Server (NTRS)

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.

Verdouw, Albert J. (Inventor)

1980-01-01

434

Diffractive optics for compact flat panel displays. Final report  

SciTech Connect

Three years ago LLNL developed a practical method to dramatically reduce the chromatic aberration in single element diffractive imaging lenses. High efficiency, achromatic imaging lenses have been fabricated for human vision correction. This LDRD supported research in applying our new methods to develop a unique, diffraction-based optical interface with solid state, microelectronic imaging devices. Advances in microelectronics have led to smaller, more efficient components for optical systems. There have, however, been no equivalent advances in the imaging optics associated with these devices. The goal of this project was to replace the bulky, refractive optics in typical head-mounted displays with micro-thin diffractive optics to directly image flat-panel displays into the eye. To visualize the system think of the lenses of someone`s eyeglasses becoming flat-panel displays. To realize this embodiment, we needed to solve the problems of large chromatic aberrations and low efficiency that are associated with diffraction. We have developed a graceful tradeoff between chromatic aberrations and the diffractive optic thickness. It turns out that by doubling the thickness of a micro-thin diffractive lens we obtain nearly a two-times improvement in chromatic performance. Since the human eye will tolerate one diopter of chromatic aberration, we are able to achieve an achromatic image with a diffractive lens that is only 20 microns thick, versus 3 mm thickness for the comparable refractive lens. Molds for the diffractive lenses are diamond turned with sub-micron accuracy; the final lenses are cast from these molds using various polymers. We thus retain both the micro- thin nature of the diffractive optics and the achromatic image quality of refractive optics. During the first year of funding we successfully extended our earlier technology from 1 cm diameter optics required for vision applications up to the 5 cm diameter optics required for this application. 3 refs., 6 figs.

Sweeney, D.; DeLong, K.

1997-04-29

435

10 CFR 1045.6 - Openness Advisory Panel.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Openness Advisory Panel. 1045.6 Section 1045...Data Classification System § 1045.6 Openness Advisory Panel. The DOE shall maintain an Openness Advisory Panel, in accordance...

2010-01-01

436

77 FR 58413 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...SPACE ADMINISTRATION [Notice 12-074] Aerospace Safety Advisory Panel; Meeting AGENCY...announces a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Harmony Myers, Aerospace Safety Advisory Panel Executive...

2012-09-20

437

76 FR 2923 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (11-004)] Aerospace Safety Advisory Panel; Meeting AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Kathy Dakon, Aerospace Safety Advisory Panel Executive...

2011-01-18

438

76 FR 26316 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...SPACE ADMINISTRATION [Notice 11- 044] Aerospace Safety Advisory Panel; Meeting AGENCY...2011, announcing a meeting of the Aerospace Safety Advisory Panel (ASAP) to take...358-0732. SUPPLEMENTARY INFORMATION: The Aerospace Safety Advisory Panel will hold its...

2011-05-06

439

76 FR 62455 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (11-088)] Aerospace Safety Advisory Panel; Meeting AGENCY...announces a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Susan Burch, Aerospace Safety Advisory Panel...

2011-10-07

440

77 FR 1955 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...SPACE ADMINISTRATION [Notice 12-001] Aerospace Safety Advisory Panel; Meeting AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Susan Burch, Aerospace Safety Advisory Panel...

2012-01-12

441

78 FR 36793 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...SPACE ADMINISTRATION [Notice 13-068] Aerospace Safety Advisory Panel; Meeting AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel (ASAP). DATES...INFORMATION CONTACT: Ms. Harmony Myers, Aerospace Safety Advisory Panel Executive...

2013-06-19

442

77 FR 25502 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (12-030)] Aerospace Safety Advisory Panel; Meeting AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Harmony Myers, Aerospace Safety Advisory Panel Executive...

2012-04-30

443

78 FR 1265 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...SPACE ADMINISTRATION [Notice 13-001] Aerospace Safety Advisory Panel; Meeting AGENCY...announces a forthcoming meeting of the Aerospace Safety Advisory Panel. [[Page 1266...INFORMATION CONTACT: Ms. Harmony Myers, Aerospace Safety Advisory Panel Executive...

2013-01-08

444

75 FR 6407 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (10- 020)] Aerospace Safety Advisory Panel; Meeting AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Wednesday...INFORMATION CONTACT: Ms. Kathy Dakon, Aerospace Safety Advisory Panel Executive...

2010-02-09

445

76 FR 65750 - Aerospace Safety Advisory Panel; Charter Renewal  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (11-105)] Aerospace Safety Advisory Panel; Charter Renewal...amendment of the charter of the NASA Aerospace Safety Advisory Panel...amendment of the charter of the NASA Aerospace Safety Advisory Panel is in the...

2011-10-24

446

76 FR 19147 - Aerospace Safety Advisory Panel; Meeting.  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (11-030)] Aerospace Safety Advisory Panel; Meeting. AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Kathy Dakon, Aerospace Safety Advisory Panel Executive...

2011-04-06

447

78 FR 57903 - Aerospace Safety Advisory Panel; Charter Renewal  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice: 13-116] Aerospace Safety Advisory Panel; Charter Renewal...renewal and amendment of the charter of the Aerospace Safety Advisory Panel...renewal and amendment of the charter of the Aerospace Safety Advisory Panel is in the...

2013-09-20

448

75 FR 61219 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (10-116)] Aerospace Safety Advisory Panel; Meeting AGENCY...announces a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Kathy Dakon, Aerospace Safety Advisory Panel Executive...

2010-10-04

449

78 FR 56941 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice: 13-114] Aerospace Safety Advisory Panel; Meeting AGENCY...announces a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Harmony Myers, Aerospace Safety Advisory Panel Executive...

2013-09-16

450

78 FR 15976 - Aerospace Safety Advisory Panel; Meeting.  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice: 13-023] Aerospace Safety Advisory Panel; Meeting. AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Wednesday...INFORMATION CONTACT: Ms. Harmony Myers, Aerospace Safety Advisory Panel Executive...

2013-03-13

451

76 FR 36937 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (11-055)] Aerospace Safety Advisory Panel; Meeting AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Kathy Dakon, Aerospace Safety Advisory Panel Executive...

2011-06-23

452

77 FR 38090 - Aerospace Safety Advisory Panel; Meeting.  

Federal Register 2010, 2011, 2012, 2013

...SPACE ADMINISTRATION [Notice 12-044] Aerospace Safety Advisory Panel; Meeting. AGENCY...announces a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Harmony Myers, Aerospace Safety Advisory Panel Executive...

2012-06-26

453

78 FR 77501 - NASA Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice: 13-153] NASA Aerospace Safety Advisory Panel; Meeting AGENCY...announces a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Thursday...INFORMATION CONTACT: Ms. Marian Norris, Aerospace Safety Advisory Panel...

2013-12-23

454

75 FR 36697 - Aerospace Safety Advisory Panel; Meeting  

Federal Register 2010, 2011, 2012, 2013

...ADMINISTRATION [Notice (10-071)] Aerospace Safety Advisory Panel; Meeting AGENCY...announce a forthcoming meeting of the Aerospace Safety Advisory Panel. DATES: Friday...INFORMATION CONTACT: Ms. Kathy Dakon, Aerospace Safety Advisory Panel Executive...

2010-06-28

455

5 CFR 2472.7 - Investigation of request; Panel assistance.  

Code of Federal Regulations, 2010 CFR

...SERVICE IMPASSES PANEL IMPASSES ARISING PURSUANT TO AGENCY DETERMINATIONS NOT TO ESTABLISH OR TO TERMINATE FLEXIBLE OR COMPRESSED WORK SCHEDULES Procedures of the Panel § 2472.7 Investigation of request; Panel assistance....

2010-01-01

456

Improved Cryostat for Cooling a Wide Panel  

NASA Technical Reports Server (NTRS)

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.

Clifton, W. B.

2004-01-01

457

76 FR 23281 - Bottom Mount Combination Refrigerator-Freezers From the Republic of Korea and Mexico: Initiation...  

Federal Register 2010, 2011, 2012, 2013

...Bottom Mount Combination Refrigerator-Freezers From the Republic of Korea...bottom mount combination refrigerator-freezers (``bottom mount refrigerators...Bottom Mount Combination Refrigerator- Freezers from the Republic of...

2011-04-26

458

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

SciTech Connect

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).

Michael Deck; Rick Russell

2010-01-05

459

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

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)

Schoenberg, Michael

1984-01-01

460

75 FR 57102 - Occupational Information Development Advisory Panel Meeting; Correction  

Federal Register 2010, 2011, 2012, 2013

...SOCIAL SECURITY ADMINISTRATION...Occupational Information Development Advisory Panel Meeting; Correction AGENCY: Social Security Administration...Occupational Information Development Advisory Panel, Social Security...

2010-09-17

461

46 CFR 113.25-15 - Distribution panels.  

Code of Federal Regulations, 2013 CFR

... COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT General Emergency Alarm Systems § 113.25-15 Distribution panels. Each distribution panel...

2013-10-01

462

46 CFR 113.25-15 - Distribution panels.  

Code of Federal Regulations, 2012 CFR

... COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT General Emergency Alarm Systems § 113.25-15 Distribution panels. Each distribution panel...

2012-10-01

463

46 CFR 113.25-15 - Distribution panels.  

Code of Federal Regulations, 2011 CFR

... COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT General Emergency Alarm Systems § 113.25-15 Distribution panels. Each distribution panel...

2011-10-01

464

46 CFR 113.25-15 - Distribution panels.  

Code of Federal Regulations, 2010 CFR

... COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT General Emergency Alarm Systems § 113.25-15 Distribution panels. Each distribution panel...

2010-10-01

465

46 CFR 113.25-15 - Distribution panels.  

... COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT General Emergency Alarm Systems § 113.25-15 Distribution panels. Each distribution panel...

2014-10-01

466

Structural Analysis of Sandwich Foam Panels  

SciTech Connect

The Sandwich Panel Technologies including Structural Insulated Panels (SIPs) can be used to replace the conventional wooden-frame construction method. The main purpose of this Cooperative Research and Development Agreement (CRADA) between UT-Battelle, LLC and SGI Venture, Inc. was to design a novel high R-value type of metal sandwich panelized technology. This CRADA project report presents design concept discussion and numerical analysis results from thermal performance study of this new building envelope system. The main objective of this work was to develop a basic concept of a new generation of wall panel technologies which will have R-value over R-20 will use thermal mass to improve energy performance in cooling dominated climates and will be 100% termite resistant. The main advantages of using sandwich panels are as follows: (1) better energy saving structural panels with high and uniform overall wall R-value across the elevation that could not be achieved in traditional walls; and (2) reducing the use of raw materials or need for virgin lumber. For better utilization of these Sandwich panels, engineers need to have a thorough understanding of the actual performance of the panels and system. Detailed analysis and study on the capacities and deformation of individual panels and its assembly have to be performed to achieve that goal. The major project activity was to conduct structural analysis of the stresses, strains, load capacities, and deformations of individual sandwich components under various load cases. The analysis simulated the actual loading conditions of the regular residential building and used actual material properties of the steel facings and foam.

Kosny, Jan [ORNL; Huo, X. Sharon [Tennessee Technological University

2010-04-01

467

Panel resonant behavior of wind turbine blades.  

SciTech Connect

The principal design drivers in the certification of wind turbine blades are ultimate strength, fatigue resistance, adequate tip-tower clearance, and buckling resistance. Buckling resistance is typically strongly correlated to both ultimate strength and fatigue resistance. A composite shell with spar caps forms the airfoil shape of a blade and reinforcing shear webs are placed inside the blade to stiffen the blade in the flap-wise direction. The spar caps are dimensioned and the shear webs are placed so as to add stiffness to unsupported panel regions and reduce their length. The panels are not the major flap-wise load carrying element of a blade; however, they must be designed carefully to avoid buckling while minimizing blade weight. Typically, buckling resistance is evaluated by consideration of the load-deflection behavior of a blade using finite element analysis (FEA) or full-scale static testing of blades under a simulated extreme loading condition. The focus of this paper is on the use of experimental modal analysis to measure localized resonances of the blade panels. It can be shown that the resonant behavior of these panels can also provide a means to evaluate buckling resistance by means of analytical or experimental modal analysis. Further, panel resonances have use in structural health monitoring by observing changes in modal parameters associated with panel resonances, and use in improving panel laminate model parameters by correlation with test data. In recent modal testing of wind turbine blades, a set of panel modes were measured. This paper will report on the findings of these tests and accompanying numerical and analytical modeling efforts aimed at investigating the potential uses of panel resonances for blade evaluation, health monitoring, and design.

Paquette, Joshua A.; Griffith, Daniel Todd

2010-03-01

468

Integrated fiducial sample mount and software for correlated microscopy  

SciTech Connect

A novel design sample mount with integrated fiducials and software for assisting operators in easily and efficiently locating points of interest established in previous analytical sessions is described. The sample holder and software were evaluated with experiments to demonstrate the utility and ease of finding the same points of interest in two different microscopy instruments. Also, numerical analysis of expected errors in determining the same position with errors unbiased by a human operator was performed. Based on the results, issues related to acquiring reproducibility and best practices for using the sample mount and software were identified. Overall, the sample mount methodology allows data to be efficiently and easily collected on different instruments for the same sample location.

Timothy R McJunkin; Jill R. Scott; Tammy L. Trowbridge; Karen E. Wright

2014-02-01

469

Frequency response calibration of recess-mounted pressure transducers  

NASA Technical Reports Server (NTRS)

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.

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

1991-01-01

470

Automated inspection of solder joints for surface mount technology  

NASA Technical Reports Server (NTRS)

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.

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

1993-01-01

471

Geologic map of Mount Mazama, Crater Lake, Oregon  

USGS Publications Warehouse

Crater Lake caldera collapsed about 6,850 yr B.P. during the climactic eruption of Mount Mazama, a High Cascade basaltic andesitic to dacitic volcanic center that was constructed during a period of about 400,000 yr. The caldera and the products of the climactic eruption are clear evidence for the presence of a shallow magma body that must have supported a hydrothermal system in the recent past. The geology of Mount Mazama has been mapped at a scale of 1:24,000 based on detailed study of the walls of Crater Lake caldera and mapping of the flanks of the volcano. The map shows lavas and fragmental deposits of Mount Mazama, lavas of nearby monogenetic volcanoes, pre-Mazama silicic volcanic rocks, products of the climactic eruption, and glacial deposits. Related topical studies of the volcanology, geochronology, petrology, and geochemistry of the Crater Lake area depend on field relations established by geologic mapping.

Bacon, Charles

1990-01-01

472

Linear and/or curvilinear rail mount system  

NASA Technical Reports Server (NTRS)

One or more linear and/or curvilinear mounting rails are coupled to a structure. Each mounting rail defines a channel and at least one cartridge assembly is engaged in the channel. Each cartridge assembly includes a housing that slides within the channel. The housing defines a curvilinearly-shaped recess longitudinally aligned with the channel when the housing is in engagement therewith. The cartridge assembly also includes a cleat fitted in the recess for sliding engagement therealong. The cleat can be coupled to a fastener that passes through the mounting rail and the housing when the housing is so-engaged in the channel. The cleat is positioned in the recess by a position of the fastener.

Thomas, Jackie D. (Inventor); Harris, Lawanna L. (Inventor)

2012-01-01

473

Analysis and optimization of mounting configuration of large aperture optics  

NASA Astrophysics Data System (ADS)

With the aim to decrease the gravitational distortion and stress for the large aperture optics, a novel mounting configuration was proposed, analyzed and optimized. The effects of the design factors of external load, supporting surface topography and supporting width were studied by using the Finite Element Method (FEM), the changing trends of the distortion and stress with these varying factors were obtained, respectively. More over, orthogonal tests of the influence of these factors were carried out, consequently, the regression analysis of the test results were processed, and the mathematical models for comprehensively considering the coupling effects of these factors were received. Further more, the optimization of the mounting configuration, based on the mathematical models and additionally considered the engineering specifications, was performed, and the optimal configuration was figured out. The numerical results showed the feasibility of the mounting configuration in the aspects of decreasing the gravitational distortion and stress.

Feng, Bin; Lu, Lihua; Liu, Haitao; Su, Ruifeng; Lv, Zhiwei

2014-09-01

474

Gaze-Contingent Spatio-Temporal Filtering in a Head-Mounted Display  

E-print Network

Gaze-Contingent Spatio-Temporal Filtering in a Head-Mounted Display Michael Dorr, Martin B, integrated into a head-mounted display (HMD), could use computer vision techniques to enhance human visual by the observer [6]. 3 Head-Mounted Display Fig. 2. Picture of our head-mounted display. Note the two scene

475

Nonparametric Comparison for Multivariate Panel Count Data  

PubMed Central

Multivariate panel count data often occur when there exist several related recurrent events or response variables defined by occurrences of related events. For univariate panel count data, several nonparametric treatment comparison procedures have been developed. However, it does not seem to exist a nonparametric procedure for multivariate cases. Based on differences between estimated mean functions, this paper proposes a class of nonparametric test procedures for multivariate panel count data. The asymptotic distribution of the new test statistics is established and a simulation study is conducted. Also the new procedures are applied to a skin cancer problem that motivated this study. PMID:24465081

Zhao, Hui; Virkler, Kate; Sun, Jianguo

2014-01-01

476

Flat or curved thin optical display panel  

DOEpatents

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.

Veligdan, J.T.

1995-01-10

477

Development of a plasma panel radiation detector  

SciTech Connect

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 sensor (PPS) design and 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.

Ball, Robert [University of Michigan; Beene, James R [ORNL; Ben Moshe, M. [Tel Aviv University; Benhammou, Yan [Tel Aviv University; Bensimon, B [Tel Aviv University; Chapman, J. Wehrley [University of Michigan; Etzion, E [Tel Aviv University; Ferretti, Claudio [University of Michigan; Friedman, Dr. Peter S. [Integrated Sensors, LLC; Levin, Daniel S. [University of Michigan; Silver, Yiftah [Tel Aviv University; Weaverdyck, Curtis [University of Michigan; Wetzel, R. [University of Michigan; Zhou, Bing [University of Michigan; Anderson, T [GE Measurement and Control Solutions; McKinny, K [GE Measurement and Control Solutions; Bentefour, E [Ion Beam Applications

2014-01-01

478

Heavy Ions In Space (HIIS) experiment  

NASA Technical Reports Server (NTRS)

The Heavy Ions In Space (HIIS) experiment has two primary objectives: (1) to measure the elemental composition of ultraheavy Galactic cosmic rays, beginning in the tin-barium region of the periodic table; and (2) to study heavy ions which arrive at LDEF below the geomagnetic cutoff, either because they are not fully stripped of electrons or because their source is within the magnetosphere. Both have practical as well as astrophysical consequences. The HIIS experiment used eight thick stacks of plastic track detectors mounted in two trays on the space facing end of LDEF. Since the last LDEF symposium, the statistics were increased of the observations and have extended the analysis to a second stack and to detector sheets near the top of a stack. New results are reported on the detector resolution and on the observations of both stopping and relativistic particles.

Adams, James H., Jr.; Beahm, Lorraine P.; Tylka, Allan J.

1992-01-01

479

A Few Observations about Mounting Moderately Sized Mirrors  

SciTech Connect

Most of the mirror mounting literature has focused on small (less than 0.1 meters) or large (greater than 1 meter) mirrors. We will examine the theory and practice of mounting moderately sized mirrors (between 0.1 and 1 meter). Two examples will be taken from optical diagnostic systems designed for the National Ignition Facility (NIF). In both cases the mirrors were removable (not bonded in place). One of the examples will be for a mirror with a poor aspect ratio (i.e. diameter to thickness ratio greater than 15:1).

Kaufman, M. I.

2011-09-01

480

A modal analysis of lamellar diffraction gratings in conical mountings  

NASA Technical Reports Server (NTRS)

A rigorous modal analysis of lamellar grating, i.e., gratings having rectangular grooves, in conical mountings is presented. It is an extension of the analysis of Botten et al. which considered non-conical mountings. A key step in the extension is a decomposition of the electromagnetic field in the grating region into two orthogonal components. A computer program implementing this extended modal analysis is capable of dealing with plane wave diffraction by dielectric and metallic gratings with deep grooves, at arbitrary angles of incidence, and having arbitrary incident polarizations. Some numerical examples are included.

Li, Lifeng

1992-01-01

481

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

NSDL National Science Digital Library

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.

Stuart Snodgrass

2005-03-02

482

Whole-mount imaging of responses in mouse vomeronasal neurons.  

PubMed

Imaging permits the visualization of neural activity from the whole-mount vomeronasal sensory epithelium with single-cell resolution. The preparation preserves an intact tissue environment, enabling the robust detection of cellular responses upon chemical stimulation and study of the precise 3D mapping of vomeronasal sensory neuron (VSN) functional types within the epithelium. Using objective-coupled planar illumination (OCPI) microscopy to perform fast volumetric imaging, we routinely record the responses of thousands of VSNs for hours from a single intact vomeronasal organ preparation. Here we document the preparation of the whole-mounted vomeronasal epithelium, multichannel stimulus delivery, and three-dimensional calcium imaging by OCPI microscopy. PMID:24014363

Xu, Pei Sabrina; Holy, Timothy E

2013-01-01

483

Rolling contact mounting arrangement for a ceramic combustor  

DOEpatents

A combustor assembly having a preestablished rate of thermal expansion is mounted within a gas turbine engine housing having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the combustor assembly. The combustor assembly is constructed of a inlet end portion, a outlet end portion and a plurality of combustor ring segments positioned between the end portions. A mounting assembly is positioned between the combustor assembly and the gas turbine engine housing to allow for the difference in the rate of thermal expansion while maintaining axially compressive force on the combustor assembly to maintain contact between the separate components.

Boyd, Gary L. (328 Sneath Way, Alpine, CA 91901); Shaffer, James E. (1780 Geronimo Tr., Maitland, FL 32751)

1995-01-01

484

Rolling contact mounting arrangement for a ceramic combustor  

DOEpatents

A combustor assembly having a preestablished rate of thermal expansion is mounted within a gas turbine engine housing having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the combustor assembly. The combustor assembly is constructed of a inlet end portion, a outlet end portion and a plurality of combustor ring segments positioned between the end portions. A mounting assembly is positioned between the combustor assembly and the gas turbine engine housing to allow for the difference in the rate of thermal expansion while maintaining axially compressive force on the combustor assembly to maintain contact between the separate components. 3 figs.

Boyd, G.L.; Shaffer, J.E.

1995-10-17

485

Position detection accuracy of a novel linac-mounted intrafractional x-ray imaging system  

SciTech Connect

Purpose: The authors have developed a system that monitors intrafractional target motion perpendicular to the treatment beam with the aid of radioopaque markers by means of separating kV image and megavoltage (MV) treatment field on a single flat-panel detector. Methods: They equipped a research Siemens Artiste linear accelerator (linac) with a 41 x 41 cm{sup 2} a-Si flat-panel detector underneath the treatment head. The in-line geometry allows kV (imaging) and MV (treatment) beams to share closely aligned beam axes. The kV source, usually mounted directly across from the flat-panel imager, was retracted toward the gantry by 13 cm to intentionally misalign kV and MV beams, resulting in a geometric separation of MV treatment field and kV image on the detector. Two consecutive images acquired within 140 ms (the first with MV-only and the second with kV and MV signal) were subtracted to generate a kV-only image. The images were then analyzed ''online'' with an automated threshold-based marker detection algorithm. They employed a 3D and a 4D phantom equipped with either a single radioopaque marker or three Calypso beacons to mimic respiratory motion. Measured room positions were either cross-referenced with a phantom voltage signal (single marker) or the Calypso system. The accuracy of the back-projection (from detected marker positions into room coordinates) was verified by a simulation study. Results: A phantom study has demonstrated that the imaging framework is capable of automatically detecting marker positions and sending this information to the tracking tool at an update rate of 7.14 Hz. The system latency is 86.9 {+-} 1.0 ms for single marker detection in the absence of MV radiation. In the presence of a circular MV field of 5 cm diameter, the latency is 87.1 {+-} 0.9 ms. The total RMS position detection accuracy is 0.20 mm (without MV radiation) and 0.23 mm (with MV). Conclusions: Based on the evaluated motion patterns and MV field size, the positional accuracy and system latency indicate that this system is suitable for real-time adaptive applications.

Fast, Martin F.; Krauss, Andreas; Oelfke, Uwe; Nill, Simeon [Department of Medical Physics in Radiation Oncology, German Cancer Research Center, Im Neuenheimer Feld 280, D-69120 Heidelberg (Germany)

2012-01-15

486

Panel Resource Management (PRM) Implementation and Effects within Safety Review Panel Settings and Dynamics  

NASA Technical Reports Server (NTRS)

While technical training and advanced degree's assure proficiency at specific tasks within engineering disciplines, they fail to address the potential for communication breakdown and decision making errors familiar to multicultural environments where language barriers, intimidating personalities and interdisciplinary misconceptions exist. In an effort to minimize these pitfalls to effective panel review, NASA's lead safety engineers to the ISS Safety Review Panel (SRP), and Payload Safety Review Panel (PSRP) initiated training with their engineers, in conjunction with the panel chairs, and began a Panel Resource Management (PRM) program. The intent of this program focuses on the ability to reduce the barriers inhibiting effective participation from all panel attendees by bolstering participants confidence levels through increased communication skills, situational awareness, debriefing, and a better technical understanding of requirements and systems.

Taylor, Robert W.; Nash, Sally K.

2007-01-01

487

Supersonic Panel Flutter Test Results for Flat Fiber-Glass Sandwich Panels with Foamed Cores  

NASA Technical Reports Server (NTRS)

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.

Tuovila, W. J.; Presnell, John G., Jr.

1961-01-01

488

Fiber Reinforced Composite Cores and Panels  

NASA Technical Reports Server (NTRS)

A fiber reinforced core panel is formed from strips of plastics foam helically wound with layers of rovings to form webs which may extend in a wave pattern or may intersect transverse webs. Hollow tubes may replace foam strips. Axial rovings cooperate with overlying helically wound rovings to form a beam or a column. Wound roving patterns may vary along strips for structural efficiency. Wound strips may alternate with spaced strips, and spacers between the strips enhance web buckling strength. Continuously wound rovings between spaced strips permit folding to form panels with reinforced edges. Continuously wound strips are helically wrapped to form annular structures, and composite panels may combine both thermoset and thermoplastic resins. Continuously wound strips or strip sections may be continuously fed either longitudinally or laterally into molding apparatus which may receive skin materials to form reinforced composite panels.

Day, Stephen W. (Inventor); Campbell, G. Scott (Inventor); Tilton, Danny E. (Inventor); Stoll, Frederick (Inventor); Sheppard, Michael (Inventor); Banerjee, Robin (Inventor)

2013-01-01

489

76 FR 9378 - Meetings of Humanities Panel  

Federal Register 2010, 2011, 2012, 2013

...will review applications for DFG/NEH FY 11 Joint Sitting Panel in DFG/NEH Bilateral Digital Humanities Program, submitted to the Office of Digital Humanities at the November 16, 2010 deadline. 20. Date: March 31, 2011. Time: 9...

2011-02-17

490

NCI DEA - President's Cancer Panel Meetings  

Cancer.gov

National Institutes of Health, National Cancer Institute, Division of Extramural Activities - Home Page Skip to Main Content Home Funding Advisory Consumer Guides FAQs & Glossary Awarded Research Division of Extramural Activities President's Cancer Panel

491

NCI DEA - President's Cancer Panel - Archives  

Cancer.gov

National Institutes of Health, National Cancer Institute, Division of Extramural Activities - Home Page Skip to Main Content Home Funding Advisory Consumer Guides FAQs & Glossary Awarded Research Division of Extramural Activities President's Cancer Panel

492

Fabric panel clean change-out frame  

DOEpatents

A fabric panel clean change-out frame, for use on a containment structure having rigid walls, is formed of a compression frame and a closure panel. The frame is formed of elongated spacers, each carrying a plurality of closely spaced flat springs, and each having a hooked lip extending on the side of the spring facing the spacer. The closure panel is includes a perimeter frame formed of flexible, wedge-shaped frame members that are receivable under the springs to deflect the hooked lips. A groove on the flexible frame members engages the hooked lips and locks the frame members in place under the springs. A flexible fabric panel is connected to the flexible frame members and closes its center.

Brown, Ronald M. (1757 Dorset Ave., Pocatello, ID 83201)

1995-01-31

493

ATR FTIR Mapping of Leather Fiber Panels  

NASA Astrophysics Data System (ADS)

Leather fiber panels are very promising materials for many applications, not only for the easy availability of the constituents but also for their outstanding fi re-retardant properties. These innovative composite panels can be an excellent material for building insulation, and in recent times, the interest of industries in this composite board has considerably arisen. For this reason the discrimination of the components in the leather fiber panels is becoming fundamental in order to ensure their homogeneous properties. A method to characterize the surface of these materials is then required. An ATR FTIR mapping system for the leather fiber panels has been performed with a Perkin-Elmer microscope coupled with a Frontier FTIR spectrometer. The system has successfully allowed transforming the optical image to a chemical one. This technique can be considered as a right tool for routine controls of the surface quality, especially when the leather shavings cannot be optically distinguished.

Tondi, G.; Grünewald, T.; Petutschnigg, A.; Schnabel, T.

2015-01-01

494

NCI DEA - Special Emphasis Panel (SEP)  

Cancer.gov

National Institutes of Health, National Cancer Institute, Division of Extramural Activities - Home Page Skip to Main Content Home Funding Advisory Consumer Guides FAQs & Glossary Awarded Research Division of Extramural Activities Special Emphasis Panel

495

78 FR 26399 - Arts Advisory Panel Meeting  

Federal Register 2010, 2011, 2012, 2013

...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...

2013-05-06

496

77 FR 22613 - Arts Advisory Panel Meeting  

Federal Register 2010, 2011, 2012, 2013

...is hereby given that five meetings of the Arts Advisory Panel to the National Council on the Arts will be held at the Nancy Hanks Center...follows (ending time is approximate): Arts Education (application review): This meeting...

2012-04-16

497

Uncertainty Analysis of Stiffened Composite Panels  

NASA Technical Reports Server (NTRS)

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.

Noor, Ahmed K.; Starnes, James H., Jr.; Peters, Jeanne M.

2000-01-01

498

75 FR 20809 - Hydrographic Services Review Panel  

Federal Register 2010, 2011, 2012, 2013

...navigation data, products and services; coastal management; fisheries management; coastal and marine spatial planning; geodesy; water levels; and other science-related fields to submit applications for Panel membership. To apply for membership...

2010-04-21

499

77 FR 76001 - Hydrographic Services Review Panel  

Federal Register 2010, 2011, 2012, 2013

...navigation data, products and services; coastal management; fisheries management; coastal and marine spatial planning; geodesy; water levels; and other science-related fields to apply for Panel membership. To apply for membership on the...

2012-12-26

500

76 FR 32957 - Hydrographic Services Review Panel  

Federal Register 2010, 2011, 2012, 2013

...navigation data, products and services; coastal management; fisheries management; coastal and marine spatial planning; geodesy; water levels; and other science-related fields to apply for Panel membership. To apply for membership on the...

2011-06-07